阅读说明：本技术 光学部件形成用树脂组合物、成型体和光学部件 (Resin composition for forming optical member, molded body, and optical member ) 是由 桥本裕喜 添田泰之 加藤久博 奥野孝行 于 2020-04-24 设计创作，主要内容包括：一种光学部件形成用树脂组合物,包含环状烯烃系聚合物和蒽醌系色素,上述环状烯烃系聚合物包含选自乙烯或α-烯烃与环状烯烃的共聚物、以及环状烯烃的开环聚合物中的至少一种。(A resin composition for forming an optical member, comprising a cycloolefin polymer and an anthraquinone dye, wherein the cycloolefin polymer contains at least one selected from the group consisting of a copolymer of ethylene or an alpha-olefin and a cycloolefin, and a ring-opening polymer of the cycloolefin.)

1. A resin composition for forming an optical member,

comprising a cycloolefin polymer and an anthraquinone dye,

the cyclic olefin polymer contains at least one selected from the group consisting of a copolymer of ethylene or an alpha-olefin and a cyclic olefin, and a ring-opened polymer of a cyclic olefin.

2. The resin composition for forming an optical member according to claim 1, wherein in a molded body having a thickness of 1mm formed from the resin composition for forming an optical member, an average value of transmittance at a wavelength of 850 to 1000nm is 85% or more, and an average value of transmittance at a wavelength of 300 to 600nm is 1% or less.

3. The resin composition for forming an optical member according to claim 1 or 2, wherein a refractive index at a wavelength of 830nm in a molded body having a thickness of 3mm formed from the resin composition for forming an optical member is 1.50 or more and 1.70 or less at a measurement temperature of 25 ℃.

4. The resin composition for forming an optical member according to any one of claims 1 to 3, wherein the anthraquinone-based coloring matter contains an anthraquinone-based coloring matter having a maximum absorption wavelength in a wavelength range of 550 to 800 nm.

5. The resin composition for forming an optical member according to any one of claims 1 to 4, wherein the anthraquinone-based pigment comprises a compound represented by the following general formula (A1),

[ solution 1]

In the general formula (A1), R¹～R¹²Each independently represents a substituent; r¹～R¹²Each of which may be the same or different, represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, an aromatic hydrocarbon group having 6 to 20 carbon atoms, a sulfo group, a sodium sulfonate group, a benzenesulfonic acid or a derivative thereof.

6. The resin composition for forming an optical member according to any one of claims 1 to 5, wherein a content of the anthraquinone dye in the resin composition for forming an optical member is 500ppm or more and 10000ppm or less with respect to the resin composition for forming an optical member.

7. The resin composition for forming an optical member according to any one of claims 1 to 6, wherein a refractive index of a molded body formed from the resin composition for forming an optical member at a wavelength of 830nm is higher than a refractive index of a molded body formed from the cyclic olefin polymer at a wavelength of 830nm by 0.00040 or more.

8. The optical member-forming grease composition according to any one of claims 1 to 7, wherein the optical member-forming resin composition has a transmittance at a wavelength of 850nm of 20% or more in a molded body having a thickness of 1 mm.

9. A molded article obtained by molding the resin composition for forming an optical member according to any one of claims 1 to 8.

10. An optical member comprising the molded body according to claim 9.

11. The optical member according to claim 10, which is a lens, a prism, or a light guide plate.

12. A resin composition for forming an optical member,

comprises a resin and an anthraquinone-based pigment,

the resin contains at least one selected from the group consisting of a cycloolefin polymer, a polycarbonate, an acrylic resin, and a polyester,

in a molded article having a thickness of 1mm and comprising the resin composition for forming an optical member, the average value of transmittance at a wavelength of 850 to 1000nm is 85% or more, the average value of transmittance at a wavelength of 300 to 600nm is 1% or less,

in a molded body having a thickness of 3mm and formed from the resin composition for forming an optical member, the refractive index at a wavelength of 830nm is 1.50 or more and 1.70 or less at a measurement temperature of 25 ℃.

Technical Field

The present invention relates to a resin composition for forming an optical member, a molded article, and an optical member.

Background

In recent years, 3D sensors and distance measuring sensors for measuring the shape and distance of an object are mounted on smart phones, automobiles, and the like, and their applications are expanding. These devices use near infrared light, and visible light is detected as noise. Therefore, optical components that block visible light and selectively transmit near-infrared light are indispensable for these apparatuses.

Conventionally, as such an optical component, a visible light cut filter has been widely used. The visible light cut filter is generally an optical member manufactured by laminating 10 or more layers of dielectric materials having a predetermined thickness on a glass substrate, and is provided between a lens and a sensor. However, the manufacturing process is complicated and the cost is high. Therefore, for example, as described in patent document 1, a method of easily manufacturing a visible light cut filter by applying a light absorbing layer on a resin substrate has been proposed.

Documents of the prior art

Patent document

Patent document 1 Japanese patent No. 3885850

Disclosure of Invention

Problems to be solved by the invention

However, in the above method, when the substrate resin is exposed due to peeling of the light absorbing layer or the like, the transmission characteristics may be greatly changed. In addition, particularly in a smartphone, which is strongly desired to be thin, a space for installing a visible light cut filter is problematic.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a resin composition for forming an optical component, which can produce a molded article that does not require application of a light absorbing layer because a molded article itself formed from the resin composition has near-infrared selective transmission characteristics, and which has a refractive index higher than that of the conventional resin composition, and which can provide a molded article that can reduce the thickness of a lens when used as a lens, for example.

Means for solving the problems

That is, according to the present invention, the following resin composition, molded article and optical member can be provided.

[1] A resin composition for forming an optical member, comprising a cycloolefin polymer and an anthraquinone dye,

the cycloolefin-based polymer includes at least one selected from the group consisting of a copolymer of ethylene or an α -olefin and a cycloolefin, and a ring-opened polymer of a cycloolefin.

[2] The resin composition for forming an optical member according to [1], wherein a molded article having a thickness of 1mm and formed from the resin composition for forming an optical member has a transmittance at a wavelength of 850 to 1000nm of 85% or more on average and a transmittance at a wavelength of 300 to 600nm of 1% or less on average.

[3] The resin composition for forming an optical member according to [1] or [2], wherein a molded article having a thickness of 3mm and formed from the resin composition for forming an optical member has a refractive index of 830nm wavelength of 1.50 or more and 1.70 or less at a measurement temperature of 25 ℃.

[4] The resin composition for forming an optical member as recited in any one of [1] to [3], wherein the anthraquinone dye contains an anthraquinone dye having a maximum absorption wavelength in a wavelength range of 550 to 800 nm.

[5] The resin composition for forming an optical member according to any one of [1] to [4], wherein the anthraquinone-based dye comprises a compound represented by the following general formula (A1).

[ solution 1]

(in the general formula (A1), R¹～R¹²Each independently represents a substituent. R¹～R¹²Each of which may be the same or different and represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an alkyl group having 1 to 20 carbon atomsA halogenated alkyl group, a cycloalkyl group having 3 to 15 carbon atoms, an aromatic hydrocarbon group having 6 to 20 carbon atoms, a sulfo group, a sodium sulfonate group, a benzenesulfonic acid or a derivative thereof. )

[6] The resin composition for forming an optical member according to any one of [1] to [5], wherein the content of the anthraquinone dye in the resin composition for forming an optical member is 500ppm or more and 10000ppm or less relative to the resin composition for forming an optical member.

[7] The resin composition for forming an optical member according to any one of [1] to [6], wherein a refractive index of a molded article formed from the resin composition for forming an optical member at a wavelength of 830nm is higher than a refractive index of a molded article formed from the cycloolefin-based polymer at a wavelength of 830nm by 0.00040 or more.

[8] The resin composition for forming an optical member according to any one of [1] to [7], wherein a molded body having a thickness of 1mm and formed from the resin composition for forming an optical member has a transmittance at a wavelength of 850nm of 20% or more.

[9] A molded article obtained by molding the resin composition for forming an optical member according to any one of [1] to [8 ].

[10] An optical member comprising the molded body according to [9 ].

[11] The optical member according to [10], which is a lens, a prism or a light guide plate.

[12] A resin composition for forming an optical member, comprising a resin and an anthraquinone pigment,

the resin contains at least one selected from the group consisting of cycloolefin polymers, polycarbonates, acrylic resins, and polyesters,

in a molded article having a thickness of 1mm and comprising the resin composition for forming an optical member, the average value of the transmittance at a wavelength of 850 to 1000nm is 85% or more, the average value of the transmittance at a wavelength of 300 to 600nm is 1% or less,

in a molded article having a thickness of 3mm and comprising the resin composition for forming an optical member, the refractive index at a wavelength of 830nm is 1.50 or more and 1.70 or less at a measurement temperature of 25 ℃.

Effects of the invention

According to the present invention, a resin composition which can produce a molded article that does not require application of a light absorbing layer because the molded article itself has near-infrared selective transmission characteristics, has a refractive index higher than that of the conventional resin composition, is excellent in heat resistance, moist heat resistance and ultraviolet resistance in a well-balanced manner, and can obtain a molded article in which a decrease in visible light shielding effect and a decrease in near-infrared transmittance are suppressed, and a molded article and an optical member formed from the resin composition can be provided.

Detailed Description

The embodiments of the present invention will be described in detail below.

In the present specification, unless otherwise specified, the expressions "a to b" in the description of the numerical ranges indicate a to b. For example, "1 to 5% by mass" means "1% by mass or more and 5% by mass or less".

The resin composition for forming an optical member according to the first embodiment of the present invention includes a cycloolefin polymer and an anthraquinone dye. The cycloolefin-based polymer according to the present embodiment includes at least one selected from the group consisting of a copolymer of ethylene or an α -olefin and a cycloolefin, and a ring-opened polymer of a cycloolefin.

The resin composition for forming an optical member according to the present embodiment includes a cycloolefin-based polymer and an anthraquinone-based dye, and includes at least one selected from the group consisting of a copolymer of ethylene or α -olefin and cycloolefin and a ring-opened polymer of cycloolefin as the cycloolefin-based polymer, thereby giving a near-infrared selective transmission characteristic to a molded body itself formed of the resin composition for forming an optical member, and the molded body can be a molded body which shields visible light and selectively transmits near-infrared light without applying a light absorbing layer.

Further, according to the resin composition for forming an optical member of the present embodiment, a molded body having a refractive index larger than that of the conventional one can be obtained. Therefore, for example, when a molded body formed from the resin composition for forming an optical component according to the present embodiment is used as a lens, the thickness of the lens can be reduced, and space saving and weight reduction can be achieved.

Further, according to the studies of the present inventors, it has been found that in the conventional art, when it is intended to impart near-infrared selective transmission characteristics to the resin composition for forming an optical member and a molded article formed from the resin composition for forming an optical member, color unevenness may occur in the resin composition for forming an optical member and the molded article.

Further, according to the present invention, in addition to the above effects, it is possible to provide: a resin composition for forming an optical member, which has excellent heat resistance, moist heat resistance and ultraviolet resistance and can provide an optical member in which a decrease in visible light blocking effect and a decrease in near-infrared transmittance are suppressed.

Hereinafter, each component contained in the resin composition for forming an optical member according to the present embodiment will be specifically described.

(cycloolefin-based Polymer)

The cycloolefin-based polymer is a polymer having a repeating unit derived from a cycloolefin as an essential structural unit.

The cycloolefin-based polymer according to the present embodiment includes at least one selected from a copolymer of ethylene or α -olefin and cycloolefin, and a ring-opened polymer of cycloolefin.

The cycloolefin-based polymer according to the present embodiment includes the polymer (a) described in japanese unexamined patent application publication No. 2009-120794, and the cycloolefin-based polymer according to the present embodiment may include: a cycloolefin polymer having an alicyclic structure and having a structural unit (a) derived from a cycloolefin represented by the following chemical formula [ I ], chemical formula [ II ] or chemical formula [ III ].

The structural unit (a) is preferably derived from a cyclic olefin represented by the following formula [ I ], formula [ II ] or formula [ III ].

[ solution 2]

The above formula [ I]Wherein n is 0 or 1, m is 0 or a positive integer, and q is 0 or 1. Wherein, when q is 1, R^aAnd R^bEach independently is the following atom or a hydrocarbon group; when q is 0, the respective bonds are bonded to form a 5-membered ring.

R¹～R¹⁸And R^aAnd R^bEach independently a hydrogen atom, a halogen atom or a hydrocarbon group which may be substituted with a halogen atom. Here, the halogen atom is a fluorine atom, a chlorine atom, a bromine atom or an iodine atom.

The hydrocarbon group is generally an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group, each independently. More specifically, as the alkyl group, there may be mentioned methyl, ethyl, propyl, isopropyl, pentyl, hexyl, octyl, decyl, dodecyl and octadecyl; as the cycloalkyl group, a cyclohexyl group; examples of the aromatic hydrocarbon group include a phenyl group and a naphthyl group. These hydrocarbon groups may be substituted with halogen atoms.

Further, the above formula [ I]In, R¹⁵～R¹⁸May be respectively combined (together with each other) to form a monocyclic ring or a polycyclic ring, and the monocyclic ring or the polycyclic ring thus formed may have a double bond. Here, specific examples of the formed monocyclic or polycyclic ring are shown below.

[ solution 3]

In the above examples, the carbon atom denoted by a number of 1 or 2 is represented by the formula [ I ]]In each case with R¹⁵(R¹⁶) Or R¹⁷(R¹⁸) Bound carbon atoms. In addition, R may be substituted by¹⁵And R¹⁶Or R¹⁷And R¹⁸An alkylidene group is formed. Such an alkylidene group is usually an alkylidene group having 2 to 20 carbon atoms, and specific examples thereof include ethylidene, propylidene and isopropylidene.

[ solution 4]

The above formula [ II]Wherein p and q are 0 or positive integers, and m and n are 0,1 or 2. Furthermore, R¹～R¹⁹Each independently is a hydrogen atom, a halogen atom, a hydrocarbon group which may be substituted with a halogen atom, or an alkoxy group.

The halogen atom has the same meaning as the halogen atom in the above formula [ I ]. The hydrocarbon group is independently an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group. More specifically, as the alkyl group, there may be mentioned methyl, ethyl, propyl, isopropyl, pentyl, hexyl, octyl, decyl, dodecyl and octadecyl; as the cycloalkyl group, a cyclohexyl group; the aromatic hydrocarbon group includes an aryl group and an aralkyl group, and specifically includes a phenyl group, a tolyl group, a naphthyl group, a benzyl group, a phenylethyl group, and the like. Examples of the alkoxy group include a methoxy group, an ethoxy group, and a propoxy group. These hydrocarbon groups and alkoxy groups may be substituted with a fluorine atom, a chlorine atom, a bromine atom or an iodine atom.

Here, R⁹And R¹⁰Bound carbon atom and R¹³Bound carbon atom or R¹¹The carbon atoms to be bonded may be bonded directly or via an alkylene group having 1 to 3 carbon atoms. That is, when the two carbon atoms are bonded via an alkylene group, R⁹And R¹³A group represented by, or R¹⁰And R¹¹The radicals indicated form together with one another a methylene group (-CH)₂-) ethylene (-CH₂CH₂-) or propylene (-CH)₂CH₂CH₂-) is an alkylene group. Further, when n ═ m ═ 0, R may be¹⁵And R¹²Or R¹⁵And R¹⁹Combine with each other to form a monocyclic or polycyclic aromatic ring. Examples of the monocyclic or polycyclic aromatic ring in this case include those in which R is 0 or n ═ m as described below¹⁵And R¹²Or R¹⁵And R¹⁹Further form (a)A group of aromatic rings.

[ solution 5]

Here, q has the same meaning as q in the formula [ II ].

[ solution 6]

(formula [ III ]]In, R¹～R⁸Each independently is a hydrogen atom or a hydrocarbon group, R⁵And R⁶、R⁶And R⁷、R⁷And R⁸May combine with each other to form a single ring, and the single ring may have a double bond. )

The above formula [ III]In, R¹～R⁸Each independently is preferably a hydrogen atom or a hydrocarbon group having 4 or less carbon atoms, and examples of the hydrocarbon group having 4 or less carbon atoms include an alkyl group such as a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and the like, and a cycloalkyl group such as a cyclopropyl group.

The cyclic olefin represented by the above-mentioned formula [ I ], [ II ] or [ III ] is more specifically exemplified below.

[ solution 7]

Bicyclo [2.2.1] -2-heptene (in the formula, the number of 1 to 7 represents the position number of carbon) and a derivative of bicyclo [2.2.1] -2-heptene which is substituted with, for example, a halogen atom or a hydrocarbon group which may be substituted with a halogen atom. The halogen atom has the same meaning as the halogen atom in the formula [ I ], and examples of the hydrocarbon group include 5-methyl, 5, 6-dimethyl, 1-methyl, 5-ethyl, 5-n-butyl, 5-isobutyl, 7-methyl, 5-phenyl, 5-methyl-5-phenyl, 5-benzyl, 5-tolyl, 5- (ethylphenyl), 5- (isopropylphenyl), 5- (biphenyl), 5- (. beta. -naphthyl), 5- (. alpha. -naphthyl), 5- (anthryl), and 5, 6-diphenyl. These hydrocarbon groups may be substituted with a fluorine atom, a chlorine atom, a bromine atom or an iodine atom.

Further, examples of the other derivatives include cyclopentadiene-acenaphthylene adduct, bicyclo [2.2.1] -2-heptene derivatives such as 1, 4-methylene-1, 4,4a,9 a-tetrahydrofluorene and 1, 4-methylene-1, 4,4a,5,10,10 a-hexahydroanthracene.

Tricyclic [4.3.0.1 ]^2,5]-3-decene, 2-methyltricyclo [4.3.0.1^2,5]-3-decene, 5-methyltricyclo [4.3.0.1 ]^2,5]Tricyclo [4.3.0.1 ] such as-3-decene^2,5]-3-decene derivative, tricyclo [4.4.0.1^2,5]-3-undecene, 10-methyltricyclo [4.4.0.1^2,5]Tricyclo [4.4.0.1 ] e.g. -3-undecene^2,5]-3-undecene derivatives.

[ solution 8]

Tetracyclic [4.4.0.1 ] ring^2,5.1^7,10]3-dodecene (in the formula, the number of 1 to 12 represents the position number of carbon), and derivatives thereof substituted with a hydrocarbon group. Examples of the hydrocarbon group include 8-methyl, 8-ethyl, 8-propyl, 8-butyl, 8-isobutyl, 8-hexyl, 8-cyclohexyl, 8-stearyl, 5, 10-dimethyl, 2, 10-dimethyl, 8, 9-dimethyl, 8-ethyl-9-methyl, 11, 12-dimethyl, 2,7, 9-trimethyl, 2, 7-dimethyl-9-ethyl, 9-isobutyl-2, 7-dimethyl, 9,11, 12-trimethyl, 9-ethyl-11, 12-dimethyl, 9-isobutyl-11, 12-dimethyl, 5,8,9, 10-tetramethyl, 8-ethylidene-9-methyl, and the like, 8-ethylidene-9-ethyl, 8-ethylidene-9-isopropyl, 8-ethylidene-9-butyl, 8-n-propylidene-9-methyl, 8-n-propylidene-9-ethyl, 8-n-propylidene-9-isopropyl, 8-n-propylidene-9-butyl, 8-isopropylidene-9-methyl, 8-isopropylidene-9-ethyl, 8-isopropylidene-9-isopropyl, 8-isopropylidene-9-butyl, 8-chloro, 8-bromo, 8-fluoro, 8, 9-dichloro, 8-phenyl, 8-methyl-8-phenyl, 8-benzyl, 8-tolyl, 8- (ethylphenyl), 8- (isopropyl) phenylPhenyl), 8, 9-diphenyl, 8- (biphenyl), 8- (. beta. -naphthyl), 8- (. alpha. -naphthyl), 8- (anthryl), 5, 6-diphenyl, and the like.

Further, as other derivatives, an adduct of (cyclopentadiene-acenaphthylene adduct) and cyclopentadiene, and the like can be cited. There may be mentioned pentacyclic [6.5.1.1 ]^3,6.0^2,7.0^9,13]-4-pentadecene and derivatives thereof, pentacyclo [7.4.0.1^2,5.1^9,12.0^{8 ,13}]-3-pentadecene and derivatives thereof, pentacyclic [6.5.1.1 ]^3,6.0^2,7.0^9,13]Pentacyclopentadecadienyl compounds such as-4, 10-pentadecadienyl, pentacyclo [8.4.0.1^2,5.1^9,12.0^8,13]-3-hexadecene and derivatives thereof, pentacyclic [6.6.1.1^3,6.0^{2, 7}.0^9,14]-4-hexadecene and derivatives thereof, hexacyclic [6.6.1.1 ]^3,6.1^10,13.0^2,7.0^9,14]-4-heptadecene and derivatives thereof, heptacyclo [8.7.0.1^2,9.1^4,7.1^11,17.0^3,8.0^12,16]-5-eicosene and derivatives thereof, heptacyclo [8.8.0.1^2,9.1^{4 ,7}.1^11,18.0^3,8.0^12,17]-5-heneicosene and derivatives thereof, octacyclo [8.8.0.1^2,9.1^4,7.1^11,18.1^13,16.0^{3, 8}.0^12,17]-5-docosacene and derivatives thereof, nonacyclo [10.9.1.1^4,7.1^13,20.1^15,18.0^2,10.0^3,8.0^12,21.0^{14 ,19}]-5-pentacosacene and derivatives thereof, nonacyclo [10.10.1.1^5,8.1^14,21.1^16,19.0^2,11.0^4,9.0^13,22.0^15,20]6-hexacosane and derivatives thereof, and the like.

Further, as other derivatives, cyclopentadiene-phenylalkyne adducts (called benzonorbornadiene), derivatives thereof substituted with a hydrocarbon group, and the like can be cited.

Specific examples of the cyclic olefin represented by the general formula [ I ], [ II ] or [ III ] are shown above, and specific examples of the structure of these compounds include the cyclic olefin shown in paragraphs [0038] to [0058] of the original specification of Japanese patent application laid-open No. 6-228380 and the cyclic olefin shown in paragraphs [0027] to [0029] of the original specification of Japanese patent application laid-open No. 2005-330465. The cycloolefin-based polymer according to the present embodiment may contain 2 or more units derived from the cycloolefin.

The cyclic olefin represented by the general formula [ I ], [ II ] or [ III ] can be produced by subjecting cyclopentadiene and an olefin having a corresponding structure to Diels-Alder reaction. It should be noted that such a cyclic monomer obtained by diels-alder reaction is generally obtained as an isomer mixture of an internal form and an external form, and the internal form is mainly produced. However, it has been known that the concentration of an isomer in an isomer mixture can be increased by, for example, the method described in Japanese patent application laid-open No. 5-86131. Thus, the ratio of the inner form to the outer form of the cyclic monomer can be adjusted and used within a range not impairing the object of the present invention.

Further, for example, a derivative of benzonorbornadiene (hereinafter, sometimes referred to as BNBD) can be produced by a conventionally known method described in, for example, GB 2244276. For example, BNBD may be obtained by reacting cyclopentadiene with 2-aminobenzoic acid in the presence of 1, 2-dimethoxyethane.

As described above, the cycloolefin-based polymer according to the present embodiment is preferably a norbornene-based polymer obtained by polymerizing a norbornene monomer including a structural unit derived from a monomer having a norbornene skeleton. Specific examples of the norbornene monomer are as described below.

[ copolymer of ethylene or alpha-olefin with Cyclic olefin ]

As described above, the cycloolefin-based polymer according to the present embodiment includes at least one selected from the group consisting of a copolymer of ethylene or an α -olefin and a cycloolefin and a ring-opened polymer of a cycloolefin, and preferably includes a copolymer of ethylene or an α -olefin and a cycloolefin.

Examples of the copolymer of ethylene or an α -olefin and a cyclic olefin include polymers described in paragraphs 0030 to 0123 of International patent publication No. 2008/047468 and cyclic olefin polymers described in Japanese unexamined patent application publication No. 2016-8236.

The copolymer may be, for example, a polymer in which at least a part of the repeating structural units has an alicyclic structure (hereinafter, also simply referred to as "polymer having an alicyclic structure"), and at least a part of the repeating units of the polymer has an alicyclic structure, and specifically, a copolymer including 1 or 2 or more kinds of structures represented by the following general formula (1) is preferable.

[ solution 9]

(in the formula (1), x and y represent copolymerization ratios and are real numbers satisfying 0/100 ≦ y/x ≦ 95/5, and x and y are molar references.

n represents the number of substitution of the substituent Q and is a real number of 0 ≦ n ≦ 2.

R¹Is 1 or 2 or more 2+ n-valent groups selected from the group consisting of C2-20, preferably 2-12 hydrocarbon groups. R²Is 1 or more than 2 1-valent groups selected from the group consisting of hydrogen atoms and alkyl groups with 1-10 carbon atoms. R³Is 1 or 2 or more kinds of 4-valent groups selected from the group consisting of C2-10, preferably C2-5 hydrocarbon groups.

Q is COOR^d(R^dIs a 1-valent group selected from the group consisting of a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms. ).

R¹、R²、R³And Q may be 1 kind respectively, or 2 or more kinds at an arbitrary ratio. )

The symbols in the above formula (1) include the following preferable conditions, and these conditions may be used in combination as necessary.

[1]R¹Is a group having at least one ring structure in the structure.

[2]When n is 0, R³The following exemplary structures (a), (b), and (c) are shown.

[ solution 10]

In the above formulae (a) to (c), R¹The same as in formula (1).

[3] n is 0.

[4] y/x is a real number satisfying 20/80 ≦ y/x ≦ 65/35.

[5]R²Is a hydrogen atom and/or-CH₃。

[6]Q is-COOH or-COOCH₃And (4) a base.

The cycloolefin-based polymer used in the present embodiment is more preferably a polymer having 1 or 2 or more structures represented by the following formula (2).

[ solution 11]

In the above formula (2), R¹Is 1 or 2 or more of 2-valent groups selected from the group consisting of C2-20, preferably C2-12 hydrocarbon groups.

R²Is 1 or more than 2 1-valent groups selected from the group consisting of hydrogen atoms and alkyl groups with 1-10 carbon atoms.

In the above formula (2), x and y represent copolymerization ratios, and are real numbers satisfying 5/95 ≦ y/x ≦ 95/5. Preferably, 50/50 ≦ y/x ≦ 95/5, and more preferably, 55/45 ≦ y/x ≦ 80/20. x and y are molar references.

The symbols in the above formula (2) include the following preferable conditions, and these conditions may be used in combination as necessary.

[1]R¹The group is a 2-valent group represented by the following formula (3).

[ solution 12]

In the above formula (3), p is an integer of 0 to 2. Preferred is a 2-valent group in which p in the above formula (3) is 1.

[2]R²Is a hydrogen atom.

Examples of ethylene and α -olefin include ethylene, propylene, butene-1, and the like, and ethylene is preferred.

As the cyclic olefin, the above-mentioned general formula [ I ] can be mentioned]、[II]、[III]The cyclic olefin represented by (A) is preferably selected from the group consisting of bicyclo [ 2.2.1%]-2-heptene, tetracyclo [4.4.0.1^2,5.1^7,10]One or more members selected from the group consisting of (E) -3-dodecene, 1, 4-methylene-1, 4,4a,9 a-tetrahydrofluorene, cyclopentadiene-benzyne adduct and cyclopentadiene-acenaphthylene adduct, and more preferably bicyclo [2.2.1] alkene adduct]-2-heptene and tetracyclo [4.4.0.1^2,5.1^7,10]-at least one of 3-dodecene.

The copolymer of ethylene or α -olefin and cyclic olefin according to the present embodiment may have a repeating structural unit derived from another copolymerizable monomer within a range that does not impair good physical properties of the resin composition according to the present embodiment, a molded article obtained from the resin composition, and the like. The copolymerization ratio is not particularly limited, and when the cyclic olefin polymer is 100 mol%, the repeating structural unit derived from a monomer other than ethylene or an α -olefin and a cyclic olefin is preferably 20 mol% or less, and more preferably 10 mol% or less. If the copolymerization ratio is not more than the upper limit, the resulting resin composition and a molded article obtained from the resin composition can have better optical properties and the like, and an optical component with higher precision can be obtained.

Examples of the other copolymerizable monomer include aromatic vinyl compounds. As the aromatic vinyl compound, styrene and its derivatives are included. The styrene derivative is a compound in which styrene is bonded with another group, and examples thereof include alkylstyrenes such as o-methylstyrene, m-methylstyrene, p-methylstyrene, 2, 4-dimethylstyrene, o-ethylstyrene and p-ethylstyrene; substituted styrenes such as hydroxystyrene, t-butoxystyrene, vinylbenzoic acid, vinylbenzylacetate, o-chlorostyrene, and p-chlorostyrene, in which a hydroxyl group, an alkoxy group, a carboxyl group, an acyloxy group, a halogen, and the like are introduced into the benzene nucleus of styrene; and vinyl biphenyl compounds such as 4-vinylbiphenyl and 4-hydroxy-4' -vinylbiphenyl.

Among them, from the viewpoint of optical characteristics of the obtained molded article, a monomer having a benzene ring unit is preferable, and for example, styrene and its derivatives are preferable.

The type of the copolymer of ethylene or α -olefin and cyclic olefin according to the present embodiment is not particularly limited, and various known copolymer types such as a random copolymer, a block copolymer, and an alternating copolymer can be used. Among them, a random copolymer is preferable.

When the amount of birefringence of a molded article obtained by molding the resin composition is reduced, the resin composition for forming an optical member according to the present embodiment preferably contains ethylene or a copolymer of an α -olefin and a cyclic olefin, which has a smaller amount of birefringence of the cyclic olefin polymer itself. The birefringence referred to herein is a retardation measured at a wavelength of 850nm on a molded article having a thickness of 1 mm.

[ Ring-opened Polymer of Cyclic olefin ]

As described above, the cycloolefin-based polymer according to the present embodiment includes at least one selected from the group consisting of a copolymer of ethylene or an α -olefin and a cycloolefin, and a ring-opened polymer of a cycloolefin. The ring-opened polymer of cyclic olefin is explained below.

Examples of the ring-opening polymer of the cyclic olefin include ring-opening polymers of norbornene monomers, ring-opening polymers of norbornene monomers and other monomers ring-opening copolymerizable therewith, and hydrogenated products thereof, and examples thereof include norbornene polymers described in japanese patent No. 6256353.

Examples of the norbornene monomer include a norbornene monomer, a tetracyclododecene monomer, a dicyclopentadiene monomer, and a methylenetetrahydrofluorene monomer.

Examples of the norbornene-based monomer include bicyclo [2.2.1] hept-2-ene (conventional name: norbornene), 5-methyl-bicyclo [2.2.1] hept-2-ene, 5-dimethyl-bicyclo [2.2.1] hept-2-ene, 5-ethyl-bicyclo [2.2.1] hept-2-ene, 5-ethylidene-bicyclo [2.2.1] hept-2-ene, 5-vinyl-bicyclo [2.2.1] hept-2-ene, 5-propenyl bicyclo [2.2.1] hept-2-ene, 5-methoxycarbonyl-bicyclo [2.2.1] hept-2-ene, 5-cyanobicyclo [2.2.1] hept-2-ene, 5-methyl-5-methoxycarbonyl-bicyclo [2.2.1] hept-2-ene and the like.

As the tetracyclododecene monomer, tetracyclo [4.4.0.1 ] is exemplified^2,5.1^7,10]-3-dodecene (tetracyclododecene), tetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene, 8-methyltetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene, 8-ethyltetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene, 8-ethylidenetetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene, 8, 9-dimethyltetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene, 8-ethyl-9-methyltetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene, 8-ethylidene-9-methyltetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene, 8-methyl-8-carboxymethyltetracyclo [4.4.0.1^2,5.1^7,10]-3-dodecene and the like.

Examples of the dicyclopentadiene-based monomer include tricyclo [4.3.0 ]^1,6.1^2,5]Deca-3, 7-diene (common name dicyclopentadiene), 2-methyldicyclopentadiene, 2, 3-dimethyldicyclopentadiene, 2, 3-dihydroxydicyclopentadiene and the like.

Examples of the methylenetetrahydrofluorene monomer include 7, 8-benzotricyclo [4.3.0.1 ]^2,5]Dec-3-ene (common name methylenetetrahydrofluorene, also known as 1, 4-methylene-1, 4,4a,9 a-tetrahydrofluorene), 1, 4-methylene-8-methyl-1, 4,4a,9 a-tetrahydrofluorene, 1, 4-methylene-8-chloro-1, 4,4a,9 a-tetrahydrofluorene, 1, 4-methylene-8-bromo-1, 4,4a,9 a-tetrahydrofluorene, and the like.

As the norbornene monomer, preferred is, for example, one selected from the group consisting of bicyclo [2.2.1]]Hept-2-ene (common name: norbornene) and its derivative (substituted on the ring), tricyclo [ 4.3.0%^1,6.1^2,5]Deca-3, 7-diene (common name dicyclopentadiene) and its derivatives, 7, 8-benzotricyclo [4.3.0.1 ]^2,5]Dec-3-ene (common name methylenetetrahydrofluorene, also known as 1, 4-methylene-1, 4,4a,9 a-tetrahydrofluorene) and derivatives thereof, tetracyclic [4.4.0.1^2,5.1^7,10]At least 1 species of 3-dodecene (common name: tetracyclododecene) and its derivatives.

Examples of the substituent substituted on the ring of these derivatives include an alkyl group, an alkylene group, a vinyl group, an alkoxycarbonyl group, and an alkylidene group. The number of the substituents may be 1 or 2 or more.

These norbornene monomers may be used alone or in combination of 2 or more.

The ring-opened polymer of a norbornene monomer or the ring-opened polymer of a norbornene monomer and another monomer ring-opening copolymerizable therewith can be obtained by polymerizing the monomer components in the presence of a known ring-opening polymerization catalyst. Examples of the ring-opening polymerization catalyst include a catalyst comprising a halide of a metal such as ruthenium or osmium, a nitrate or an acetylacetone compound, and a reducing agent, and a catalyst comprising a halide of a metal such as titanium, zirconium, tungsten, or molybdenum, an acetylacetone compound, and an organoaluminum compound.

Examples of the other monomer copolymerizable with norbornene monomer by ring-opening polymerization include monocyclic cycloolefin monomers such as cyclohexene, cycloheptene and cyclooctene.

The hydrogenated product of the ring-opening polymer of a norbornene monomer can be generally obtained by adding a known hydrogenation catalyst containing a transition metal such as nickel or palladium to a polymerization solution of the ring-opening polymer and hydrogenating a carbon-carbon unsaturated bond.

In the cycloolefin polymer according to the present embodiment, the content of the structural unit derived from the aromatic ring-containing monomer in the cycloolefin polymer is preferably less than 70 mol%, more preferably 50 mol% or less, further preferably 30 mol% or less, and particularly preferably 10 mol% or less, based on 100 mol% of the whole cycloolefin polymer. The lower limit of the content of the structural unit derived from the aromatic ring-containing monomer in the cycloolefin-based polymer according to the present embodiment is, for example, 0 mol% or more. That is, the cycloolefin-based polymer according to the present embodiment may be such that the cycloolefin-based polymer does not contain a structural unit derived from an aromatic ring-containing monomer.

(polar group-containing cycloolefin-based Polymer (X))

The cycloolefin-based polymer according to the present embodiment includes at least one selected from the group consisting of a copolymer of ethylene or α -olefin and cycloolefin and a ring-opened polymer of cycloolefin, and may include a cycloolefin-based polymer other than a copolymer of ethylene or α -olefin and cycloolefin and a ring-opened polymer of cycloolefin.

As an example, the cycloolefin-based polymer according to the present embodiment may include a modified product of a cycloolefin-based polymer modified with a polar group (polar group-containing cycloolefin-based polymer (X). Examples of the polar group-containing cycloolefin-based polymer (X) include a copolymer obtained by graft polymerization or graft polymerization of a polar group-containing monomer and a cycloolefin-based polymer, and a copolymer of a cyclic olefin and a polar group-containing monomer.

(anthraquinone pigments)

The resin composition for forming an optical member according to the present embodiment contains an anthraquinone pigment. The resin composition for forming an optical member according to the present embodiment may contain 1 or 2 or more kinds of anthraquinone pigments. The anthraquinone-based dye according to the present embodiment preferably includes an anthraquinone-based dye having a maximum absorption wavelength within a wavelength range of 550 to 800 nm.

The resin composition for forming an optical member according to the present embodiment preferably contains a blue anthraquinone-based dye and/or a green anthraquinone-based dye.

Here, when the resin composition for forming an optical member according to the present embodiment contains a blue anthraquinone-based dye, the maximum absorption wavelength of the blue anthraquinone-based dye is preferably in the wavelength range of 550 to 700nm, and more preferably in the wavelength range of 550 to 600 nm.

When the resin composition for forming an optical member according to the present embodiment contains a green anthraquinone-based dye, the maximum absorption wavelength of the green anthraquinone-based dye is preferably in the wavelength range of 600 to 800nm, and more preferably in the wavelength range of 650 to 750 nm.

The anthraquinone-based dye according to the present embodiment preferably contains a compound represented by the following general formula (a 1).

[ solution 13]

In the general formula (A1), R¹～R¹²Each independently represents a substituent. R¹～R¹²Each of which may be the same or different, represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, an aromatic hydrocarbon group having 6 to 20 carbon atoms, a sulfo group, a sodium sulfonate group, a benzenesulfonic acid or a derivative thereof.

Specific examples of the anthraquinone-based coloring matter according to the present embodiment include sodium 2- [ [9, 10-dihydro-4-methylamino-9, 10-dioxanthracen-1-yl ] amino ] -5-methylbenzenesulfonate, 1, 4-bis (p-toluylamino) anthraquinone, 1, 4-bis (2-sodiosulfo-4-methylanilino) anthraquinone, 1, 4-bis [2- (sodiosulfo) -4-butylanilino ] -9, 10-anthraquinone, 5, 8-bis (p-butylanilino) -1, 4-dihydroxyanthraquinone, and 1-methylamino-4- [ (3-methylphenyl) amino ] -9, 10-anthraquinone.

The resin composition for forming an optical member according to the present embodiment contains the anthraquinone-based coloring matter in the above form, and thus has more excellent visible light absorption and near infrared light transmittance, and has an excellent refractive index increasing effect.

The resin composition for forming an optical member according to the present embodiment may contain a pigment other than an anthraquinone-based pigment, and a specific example thereof includes an azo-based pigment.

In the resin composition for forming an optical member according to the present embodiment, when the total of the anthraquinone-based coloring matter and the coloring matter other than the anthraquinone-based coloring matter contained in the resin composition for forming an optical member is set to 100 parts by mass, the anthraquinone-based coloring matter contained in the resin composition for forming an optical member is preferably 30 parts by mass or more and 100 parts by mass or less, more preferably 50 parts by mass or more and 100 parts by mass or less, and particularly preferably 60 parts by mass or more and 100 parts by mass or less.

By setting the amount of the anthraquinone dye in all the dyes contained in the resin composition for forming an optical member within the above numerical range, a molded article having less color unevenness and more excellent refractive index increasing effect can be obtained.

In the resin composition for forming an optical member according to the present embodiment, the content of the anthraquinone dye in the resin composition for forming an optical member is preferably 500ppm to 10000ppm, more preferably 800ppm to 8000ppm, and further more preferably 900ppm to 4000ppm, relative to the resin composition for forming an optical member.

(other Components)

The resin composition for forming an optical member according to the present embodiment may contain, as required, known additives as optional components within a range that does not impair the good physical properties of the resin composition for forming an optical member according to the present embodiment and a molded article thereof. As the additives, for example, a phenol-based stabilizer, a higher fatty acid metal salt, an antioxidant, an ultraviolet absorber, a hindered amine-based light stabilizer, a hydrochloric acid absorbent, a metal deactivator, an antistatic agent, an antifogging agent, a lubricant, a slip agent, a nucleating agent, a plasticizer, a flame retardant, a phosphorus-based stabilizer, and the like may be blended in an appropriate amount to such an extent that the object of the present invention is not impaired.

The total content of the cycloolefin polymer and the dye including the anthraquinone dye in the resin composition for forming an optical member according to the present embodiment is preferably 50% by mass or more and 100% by mass or less, more preferably 60% by mass or more and 100% by mass or less, further preferably 70% by mass or more and 100% by mass or less, and particularly preferably 80% by mass or more and 100% by mass or less, when the total content of the resin composition for forming an optical member is 100% by mass, from the viewpoint of ensuring moldability and further improving visible light absorption, near infrared light transmittance, refractive index increasing effect, and the like.

The resin composition for forming an optical member according to the present embodiment can be obtained by the following method: a method of melt-kneading a raw material containing a cycloolefin polymer and an anthraquinone pigment by using a known kneading apparatus such as an extruder and a banbury mixer; a method in which a raw material containing a cycloolefin polymer and an anthraquinone dye is dissolved in a common solvent, and then the solvent is evaporated; and a method of adding a raw material solution containing a cycloolefin polymer and an anthraquinone dye to a poor solvent to precipitate the mixture.

(Properties of resin composition for Forming optical Member)

In the resin composition for forming an optical member according to the present embodiment, it is preferable that the average value of the transmittance at a wavelength of 850 to 1000nm is 85% or more and the average value of the transmittance at a wavelength of 300 to 600nm is 1% or less in a molded article having a thickness of 1mm formed from the resin composition for forming an optical member. Further, the resin composition for forming an optical member according to the present embodiment is more preferably such that the average value of the transmittance at a wavelength of 850 to 1000nm is 90% or more and the average value of the transmittance at a wavelength of 300 to 600nm is 0.1% or less in a molded article having a thickness of 1mm and formed from the resin composition for forming an optical member.

In the resin composition for forming an optical member according to the present embodiment, the molded article having a thickness of 1mm formed from the resin composition for forming an optical member preferably has a transmittance of 850nm wavelength of 20% or more, more preferably 50% or more, and particularly preferably 85% or more.

The resin composition for forming an optical member according to the present embodiment is a resin composition for forming an optical member which can obtain an optical member capable of sufficiently removing noise and sufficiently transmitting near-infrared light related to a sensor by adjusting the visible light shielding property and the near-infrared light transmittance to the above numerical value ranges, and therefore, the resin composition for forming an optical member can be particularly suitably used as, for example, a 3D sensor or a distance measuring sensor for measuring the shape and distance of an object.

The transmittance at each wavelength of the resin composition for forming an optical component according to the present embodiment can be determined as follows.

First, a square plate-shaped molded body having a thickness of 1mm, which is formed from the resin composition for forming an optical component according to the present embodiment, is obtained by, for example, injection molding. Here, the molding conditions were set to 275 ℃ in the cylinder temperature and 3MPa in the back pressure in the air atmosphere. Using the thus obtained square plate having a thickness of 1mm as a sample, a transmittance was measured at intervals of 1nm from a wavelength of 300nm to 600nm and at intervals of 1nm from a wavelength of 850nm to 1000nm using an ultraviolet-visible near-infrared spectrophotometer (for example, ultraviolet-visible near-infrared spectrophotometer U-4150 (manufactured by Hitachi Seisakusho Co., Ltd.). The average value of the transmittance at a wavelength of 850 to 1000nm means the arithmetic average value of the transmittance measured at every 1nm from the wavelength of 850 to 1000nm, and the transmittance at a wavelength of 300 to 600nm means the arithmetic average value of the transmittance measured at every 1nm from the wavelength of 300 to 600 nm.

In the resin composition for forming an optical member according to the present embodiment, the refractive index of a molded article formed from the resin composition for forming an optical member at a wavelength of 830nm is preferably 1.50 or more and 1.70 or less, more preferably 1.50 or more and 1.60 or less, further preferably 1.53 or more and 1.57 or less, and particularly preferably 1.53 or more and 1.55 or less at a measurement temperature of 25 ℃.

In addition, in the resin composition for forming an optical member according to the present embodiment, the refractive index of the molded article formed from the resin composition for forming an optical member at a wavelength of 830nm is preferably higher by 0.00040 or more, more preferably higher by 0.00080 or more, than the refractive index of the molded article formed from the cyclic olefin polymer according to the present embodiment at a wavelength of 830 nm.

Since the resin composition for forming an optical member according to the present embodiment can obtain a molded body having a refractive index larger than that of a conventional resin composition for forming an optical member, for example, when the molded body formed from the resin composition for forming an optical member according to the present embodiment is used as a lens, the thickness of the lens can be reduced.

The refractive index of the molded article formed from the resin composition for forming an optical member at a wavelength of 830nm and the refractive index of the molded article formed from the cyclic olefin polymer at a wavelength of 830nm can be determined by the following methods.

First, a rectangular plate-shaped molded article having a thickness of 3mm and made of a cycloolefin polymer, which are formed from the resin composition for forming an optical member according to the present embodiment, are obtained by, for example, injection molding. Here, the molding conditions were air atmosphere, cylinder temperature 275 ℃ and back pressure 3 MPa. Using the thus obtained square plate having a thickness of 3mm as a sample, a refractive index at a wavelength of 830nm was measured at a measurement temperature of 25 ℃ using a refractometer (e.g., refractometer KPR-3000 (manufactured by Shimadzu corporation)).

(molded body)

The molded article according to the present embodiment is a molded article obtained by molding the resin composition for forming an optical component according to the present embodiment. In other words, the molded article according to the present embodiment is a molded article formed from a resin composition for forming an optical member, which contains a cycloolefin polymer and an anthraquinone dye.

As described below, the method for obtaining the molded article according to the present embodiment is not particularly limited, and the molded article according to the present embodiment is preferably an injection molded article obtained by injection molding.

The molded article according to the present embodiment preferably has an average value of transmittance at a wavelength of 850 to 1000nm of 85% or more and an average value of transmittance at a wavelength of 300 to 600nm of 1% or less when converted into a thickness of 1mm, more preferably has an average value of transmittance at a wavelength of 850 to 1000nm of 90% or more and an average value of transmittance at a wavelength of 300 to 600nm of 0.1% or less when converted into a thickness of 1 mm.

The molded article according to the present embodiment preferably has a transmittance at a wavelength of 850nm of 20% or more, more preferably 50% or more, and particularly preferably 85% or more, in terms of a thickness of 1 mm.

The refractive index at a wavelength of 830nm of the molded article according to the present embodiment is preferably higher by 0.00040 or more, more preferably 0.00080 or more, than the refractive index at a wavelength of 830nm of the molded article comprising the cyclic olefin polymer according to the present embodiment.

The molded article according to the present embodiment can be used as an optical component. That is, the optical member according to the present embodiment includes the molded body according to the present embodiment. The optical member according to the present embodiment can be suitably used as an optical member such as a lens, a prism, or a light guide plate. The optical member according to the present embodiment has high visible light blocking properties and high near-infrared light transmission properties without providing a light-absorbing layer coating layer, and therefore can be suitably used as a sensor that needs to sense near-infrared light because visible light becomes noise, for example, an optical member for a 3D sensor and a distance measuring sensor that are mounted on a smartphone or an automobile and that are used for measuring the shape and distance of an object.

(method of producing molded article)

The molded article according to the present embodiment can be obtained by molding the resin composition for forming an optical member according to the present embodiment into a predetermined shape. The method for obtaining a molded article by molding the resin composition for forming an optical component according to the present embodiment is not particularly limited, and a known method can be used.

Although depending on the use and shape thereof, for example, extrusion molding, injection molding, compression molding, blow molding, extrusion blow molding, injection blow molding, pressure molding, vacuum molding, powder slush molding, calender molding, foam molding, and the like can be applied. Among them, injection molding is preferred from the viewpoint of moldability and productivity. The molding conditions may be appropriately selected depending on the purpose of use and the molding method, and for example, the resin temperature in the injection molding is appropriately selected in the range of usually 150 to 400 ℃, preferably 200 to 350 ℃, and more preferably 230 to 330 ℃.

The molded article according to the present embodiment can be used in various forms such as a lens shape, a spherical shape, a rod shape, a plate shape, a cylindrical shape, a tubular shape, a fibrous shape, a film shape, or a sheet shape.

The molded article according to the present embodiment may contain a known additive as an optional component as necessary within a range not to impair good physical properties of the molded article according to the present embodiment. As the additives, for example, a phenol-based stabilizer, a higher fatty acid metal salt, an antioxidant, an ultraviolet absorber, a hindered amine-based light stabilizer, a hydrochloric acid absorbent, a metal deactivator, an antistatic agent, an antifogging agent, a lubricant, a slip agent, a nucleating agent, a plasticizer, a flame retardant, a phosphorus-based stabilizer, and the like may be blended in an appropriate amount to such an extent that the object of the present invention is not impaired.

When the molded article according to the present embodiment is used as an optical lens, the optical lens may be combined with an optical lens different from the above-described optical lens to form an optical lens system.

That is, the optical lens system according to the present embodiment includes a1 st optical lens formed of a molded body including the resin composition according to the present embodiment, and a 2 nd optical lens different from the 1 st optical lens.

The optical lens of the above 2 nd is not particularly limited, and for example, an optical lens composed of at least one resin selected from a polycarbonate resin and a polyester resin can be used.

The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within a range in which the object of the present invention can be achieved are included in the present invention.

The resin composition for forming an optical member according to the second embodiment of the present invention comprises a resin and an anthraquinone dye, and further comprises at least one selected from the group consisting of a cycloolefin polymer, a polycarbonate, an acrylic resin, and a polyester as the resin,

in a molded article having a thickness of 1mm and formed from the resin composition for forming an optical member, the average value of the transmittance at a wavelength of 850 to 1000nm is 85% or more, the average value of the transmittance at a wavelength of 300 to 600nm is 1% or less, preferably 0.1% or less,

in a molded article having a thickness of 3mm and formed from the resin composition for forming an optical member, the refractive index at a wavelength of 830nm is 1.50 to 1.70 at a measurement temperature of 25 ℃, preferably 1.50 to 1.60, and more preferably 1.53 to 1.57.

Hereinafter, each component contained in the resin composition for forming an optical member according to the present embodiment will be specifically described.

The resin contains at least one selected from the group consisting of a cycloolefin polymer, a polycarbonate, an acrylic resin, and a polyester.

The same cycloolefin-based polymer as that described above can be used.

The polycarbonate, the acrylic resin, and the polyester are not particularly limited, and known ones can be used within the range in which the effects of the present invention can be exhibited.

The anthraquinone-based coloring matter, the amount added, other components, the physical properties of the resin composition for forming an optical component, the molded article, the method for producing the molded article, and the like are the same as those of the first embodiment.

Examples

The present invention will be described in detail below with reference to examples, but the present invention is not limited to the description of these examples.

The following resins were used in the following examples and comparative examples.

< resin >

Ethylene with Cyclic olefins (Tetracyclo [ 4.4.0.1)^2,5.1^7,10]-3-dodecene) (manufactured by mitsui chemical company; the product name is as follows: apel 5014 CL; MFR: 36g/10min (260 ℃, 2.16kg load, according to ASTM D1238); tg: 135 ℃ C.)

[ example 1]

To the pellets of the resin, 1000ppm of SudanII (azo-based, maximum absorption wavelength 500nm, manufactured by Tokyo chemical Co., Ltd.) as an orange pigment and 1000ppm of a blue pigment plate blue 8540 (anthraquinone-based, maximum absorption wavelength 600nm, manufactured by this chemical Co., Ltd.) were added, and the mixture was extrusion-kneaded at 260 ℃ using a twin-screw extruder (made of steel, manufactured by Japan) to obtain a resin composition. The obtained resin composition was pelletized with a pelletizer.

The chemical formula of SudanII is shown below.

[ solution 14]

The chemical formula of plat blue 8540 is shown below.

[ solution 15]

[ example 2]

Pellets of a resin composition were obtained in the same manner as in example 1 except that the amount of the orange pigment SudanII added was changed to 1000ppm and the amount of the blue pigment Plast blue 8540 added was changed to 2000 ppm.

[ example 3]

Pellets of a resin composition were obtained in the same manner as in example 1 except that the amount of the orange pigment SudanII added was changed to 2000ppm and the amount of the blue pigment Plast blue 8540 added was changed to 1000 ppm.

[ example 4]

Pellets of a resin composition were obtained in the same manner as in example 1 except that the pigments used and the amounts added were changed to 1000ppm of a Red pigment PS-Red G (manufactured by Mitsui chemical FINE, anthraquinone-based, maximum absorption wavelength 500nm), 2000ppm of a Black pigment Kayaset Black A-N (manufactured by Nippon chemical Co., Ltd., mixture of amino ketone-based and anthraquinone-based), 2000ppm of a Green pigment Solvent Green 28 (manufactured by Nippon chemical Co., Ltd., anthraquinone-based, maximum absorption wavelength 680 nm).

The structural formula of PS-Red G is shown below.

[ solution 16]

The structural formula of Solvent Green 28 is shown below.

[ solution 17]

[ example 5]

Pellets of a resin composition were obtained in the same manner as in example 1 except that the pigment used and the addition amount were changed to 1000ppm of SudanII (available from Tokyo chemical Co., Ltd., azo-based, maximum absorption wavelength 500nm), 2000ppm of blue pigment plant blue 8540 (available from Co., Ltd., anthraquinone-based, maximum absorption wavelength 600nm), and 2000ppm of Green pigment Solvent Green 28 (available from Co., Ltd., anthraquinone-based, maximum absorption wavelength 680 nm).

[ example 6]

Pellets of a resin composition were obtained in the same manner as in example 1 except that the pigment used and the amount added were changed to 3000ppm of Kayaset Black A-N (a mixture of an amino ketone-based pigment and an anthraquinone-based pigment manufactured by Nippon Kagaku Co., Ltd.) and 2000ppm of Green pigment Solvent Green 28 (an anthraquinone-based pigment manufactured by Nippon Kagaku Co., Ltd., maximum absorption wavelength of 680 nm).

Comparative example 1

Will contain ethylene and a cyclic olefin (tetracyclo [ 4.4.0.1)^2,5.1^7,10]-3-dodecene) (product name: apel 5014CL) was pelletized with a pelletizer. The resin composition according to comparative example 1 was not subjected to addition of a coloring matter and extrusion kneading.

Comparative example 2

Pellets of a resin composition were obtained in the same manner as in example 1 except that the pigment used and the amount added were changed to 1000ppm of Sudan II, which is an orange pigment, and 1000ppm of Sudan Black B (azo-based pigment, manufactured by Tokyo chemical Co., Ltd., maximum absorption wavelength 600 nm).

The structural formula of Sudan Black B is shown below.

[ solution 18]

The pellets obtained in examples 1 to 6 and comparative examples 1 and 2 were injection-molded by an injection molding machine (ROBOSHOT S2000 i-30. alpha. manufactured by Sonco Ltd.) at a barrel temperature of 275 ℃ and a back pressure of 3MPa to form a square plate having a thickness of 1mm X35 mm X65 mm and a square plate having a thickness of 3mm X35 mm X65 mm.

[ evaluation of visible light transmittance ]

Using the thus obtained square plate having a thickness of 1mm × 35mm × 65mm as a sample, the transmittance at a wavelength of 300nm to 600nm was measured at intervals of 1nm using an ultraviolet-visible near-infrared spectrophotometer U-4150 (manufactured by Hitachi high tech., Ltd.), and the average value thereof was defined as the visible light transmittance. The obtained transmittance was evaluated according to the following criteria.

Over 1%: is prepared from

More than 0.1% and less than 1%: good quality

Less than 0.1%: very good

[ evaluation of near Infrared light transmittance ]

Using the thus obtained square plate having a thickness of 1 mm. times.35 mm. times.65 mm as a sample, the transmittance at a wavelength of 850nm to 1000nm was measured at intervals of 1nm using an ultraviolet-visible near-infrared spectrophotometer U-4100 (manufactured by Hitachi high and New technology Co., Ltd.), and the average value thereof was defined as the near-infrared light transmittance. The obtained transmittance was evaluated according to the following criteria.

Less than 85%: is prepared from

85% or more and less than 90%: good quality

More than 90 percent: very good

[ evaluation of color unevenness ]

The square plate having a thickness of 3 mm. times.35 mm. times.65 mm thus obtained was judged by visual observation for the presence or absence of color unevenness. The case where color unevenness was observed was x, and the case where no color unevenness was observed was excellent.

[ evaluation of increase in refractive index and refractive index ]

Using the thus obtained square plate having a thickness of 3mm X35 mm X65 mm as a sample, the refractive index at a wavelength of 830nm was measured at a measurement temperature of 25 ℃ by using a refractometer KPR-3000 (manufactured by Shimadzu corporation).

Further, the refractive index increase was obtained in comparison with the case where no coloring matter was added (comparative example 1). The refractive index increase obtained was evaluated according to the following criteria.

Less than 0.0004: is prepared from

0.0004 or more and less than 0.0008: o-

0.0008 or more: very good

[ amount of change in visible light transmittance and amount of change in near-infrared transmittance before and after Heat resistance test ]

The resulting square plate having a thickness of 1 mm. times.35 mm. times.65 mm was heated in a high temperature chamber at a temperature of 105 ℃ for 1000 hours. The visible light transmittance of each sample after the heat resistance test was measured by the above-described method, and the average value was obtained. The amount of change in visible light transmittance before and after the heat resistance test was evaluated according to the following criteria.

1 or more: is prepared from

0.1 or more and less than 1: good quality

Less than 0.1: very good

The near infrared transmittance of each sample after the heat resistance test was measured by the above-described method, and the average value was obtained. The amount of change in the near infrared transmittance before and after the heat resistance test was evaluated according to the following criteria.

1 or more: is prepared from

0.1 or more and less than 1: good quality

Less than 0.1: very good

[ amount of change in visible light transmittance and amount of change in near-infrared transmittance before and after the moist Heat resistance test ]

The resulting square plate having a thickness of 1 mm. times.35 mm. times.65 mm was heated in a constant temperature and humidity bath at a temperature of 85 ℃ and a humidity of 85% for 168 hours. The visible light transmittance of each sample after the wet heat resistance test was measured by the above-described method, and the average value was obtained. The amount of change in visible light transmittance before and after the moist heat resistance test was evaluated according to the following criteria.

1 or more: is prepared from

0.1 or more and less than 1: good quality

Less than 0.1: very good

The near infrared transmittance of each sample after the wet heat resistance test was measured by the above-described method, and the average value was obtained. The amount of change in the near infrared transmittance before and after the moist heat resistance test was evaluated according to the following criteria.

1 or more: is prepared from

0.1 or more and less than 1: good quality

Less than 0.1: very good

[ amount of change in visible light transmittance and amount of change in near-infrared light transmittance before and after ultraviolet resistance test ]

The obtained square plate having a thickness of 1 mm. times.35 mm. times.65 mm was irradiated with ultraviolet rays under the following conditions.

An irradiation device: FALAUH (Happy test mechanism UVFade)

Light source: ultraviolet carbon arc lamp

Light source output power: 500W/m²

Distance between light source and sample: 250mm

Test temperature: 61 deg.C

Irradiation time: 1000 hours

The visible light transmittance of each sample after the ultraviolet resistance test was measured by the above-described method, and the average value was obtained. The amount of change in visible light transmittance before and after the ultraviolet resistance test was evaluated according to the following criteria.

1 or more: is prepared from

0.1 or more and less than 1: good quality

Less than 0.1: very good

The near infrared transmittance of each sample after the ultraviolet resistance test was measured by the above-described method, and the average value was obtained. The amount of change in the near infrared transmittance before and after the ultraviolet resistance test was evaluated according to the following criteria.

1 or more: is prepared from

0.1 or more and less than 1: good quality

Less than 0.1: very good

[ Table 1]

[ Table 2]

As described above, the molded article obtained in the examples had high visible light-shielding properties and high near-infrared light-transmitting properties, and further, the effect of increasing the refractive index of the molded article was excellent as compared with comparative example 1 in which no coloring matter was added. On the other hand, the molded articles obtained in the comparative examples which did not contain the anthraquinone-based coloring matter were inferior to those obtained in the examples in the visible light-shielding property, near infrared light transmittance and refractive index-improving effect.

Further, the molded articles obtained in examples were excellent in heat resistance, moist heat resistance and ultraviolet resistance in a well-balanced manner, and a decrease in visible light shielding effect and a decrease in near infrared transmittance were suppressed as compared with comparative examples.

The present application claims priority based on japanese application laid-open at 2019, 5/14, No. 2019-091098, the disclosure of which is incorporated in its entirety into the present specification.