阅读说明：本技术 光学透明树脂和使用其形成的电子元件 (Optically transparent resin and electronic component formed using the same ) 是由 朴炫珍 李相宰 金天基 于 2018-04-24 设计创作，主要内容包括：本发明涉及一种光学透明树脂和使用所述光学透明树脂形成的电子元件,所述光学透明树脂包括：1)由化学式1表示的聚有机硅氧烷树脂；和2)至少一种光引发剂,所述光透明树脂的折射率为1.41至1.55。(The present invention relates to an optically transparent resin and an electronic component formed using the optically transparent resin, the optically transparent resin including: 1) a polyorganosiloxane resin represented by chemical formula 1; and 2) at least one photoinitiator, the refractive index of the light transparent resin being 1.41 to 1.55.)

1. An optically transparent resin, comprising:

1) a polyorganosiloxane resin represented by the following chemical formula 1; and

2) one or more photo-initiators,

wherein the refractive index of the optically transparent resin is 1.41 to 1.55:

[ chemical formula 1]

(R1SiO_3/2)_a(R2SiO_3/2)_b(R3₂SiO_2/2)_c(R4SiO_3/2)_d(Me₃SiO_1/2)_e

In chemical formula 1

R1 to R4 are identical to or different from each other and are each independently selected from the group consisting of hydrogen, alkyl groups, alkenyl groups, aryl groups, glycidyl groups, isocyanate groups, hydroxyl groups, carboxyl groups, vinyl groups, acrylate groups, methacrylate groups, epoxy groups, cyclic ether groups, sulfide groups, acetal groups, lactone groups, amide groups, alkylaryl groups, alkylglycidyl groups, alkylisocyanate groups, alkylhydroxyl groups, alkylcarboxyl groups, alkylvinyl groups, alkylacrylate groups, alkylmethacrylate groups, alkylcycloether groups, alkylsulfide groups, alkylalcetal groups, alkyllactone groups and alkylamide groups, and

the a: b: c: d: e are (0 to 60): 70 to 450: (0 to 60): 1 to 20 by weight ratio.

2. The optically transparent resin as claimed in claim 1, wherein (R1 SiO) in chemical formula 1_3/2)_aDerived from the following chemical formula 2:

[ chemical formula 2]

In chemical formula 2, R1 is an alkyl group.

3. The optically transparent resin as claimed in claim 1, wherein (R2 SiO) in chemical formula 1_3/2)_bDerived from the following chemical formula 3:

[ chemical formula 3]

In chemical formula 3, R2 is an acrylate group, a methacrylate group, an alkyl acrylate group, or an alkyl methacrylate group.

4. The optically transparent resin as claimed in claim 1, which is(R3) in chemical formula 1₂SiO_2/2)_cDerived from the following chemical formula 4:

[ chemical formula 4]

In chemical formula 4, R3 is an alkyl group.

5. The optically transparent resin as claimed in claim 1, wherein (R4 SiO) in chemical formula 1_3/2)_dDerived from the following chemical formula 5:

[ chemical formula 5]

In chemical formula 5, R4 is an aryl group.

6. The optically transparent resin of claim 1, wherein the one or more photoinitiators are in the form of a photoinitiator mixture dissolved in one or more of an acrylate-based monomer, a methacrylate-based monomer, and a siloxane-based monomer.

7. The optically transparent resin of claim 6, further comprising:

and (3) a tackifier.

8. The optically transparent resin of claim 7, wherein the tackifier is a silicone-based compound or a silane-based compound containing at least one hydrolyzable functional group.

9. The optically transparent resin of claim 7, wherein the polyorganosiloxane resin is contained in an amount of 60 to 95 wt%, the photoinitiator mixture is contained in an amount of 1 to 30 wt%, and the tackifier is contained in an amount of 0.5 to 10 wt%, based on the total weight of the optically transparent resin.

10. An electronic component formed by using the optically transparent resin according to any one of claims 1 to 9.

Technical Field

This application claims priority and benefit from korean patent application No. 10-2017-0060421, filed on 16.5.2017 to the korean intellectual property office, the entire contents of which are incorporated herein by reference.

The present invention relates to an optically transparent resin and an electronic component formed using the same.

Background

Recently, flat-type image display devices such as liquid crystal, plasma, and organic EL have attracted attention. Generally, at least one side of a flat-panel type image display device has a display region (image display unit) in which a semiconductor layer or a phosphor layer constituting an active element, or a plurality of pixels formed of a light emitting layer are disposed in a matrix between a pair of substrates (e.g., glass) having optical transparency. In general, the periphery of a display area (image display unit) and a protection unit formed of an optical plastic such as glass or acrylic are hermetically sealed by an adhesive.

In an image display device, in order to prevent a decrease in visibility caused by reflection of outdoor light or indoor illumination, a thin image display device in which a resin composition is interposed between a protective unit and an image display unit is manufactured, and a heat-curable or ultraviolet-curable resin is used as the curable resin composition used herein.

In addition, the touch system has been considered as one of important input systems in modern society, and thus, the Touch Screen Panel (TSP) gradually expands its range. Since the advent of the capacitive touch system by iPhone in 2007, the demand for TSP is rapidly increasing with the growth of smart phones and tablet computers, and it is expected that the demand for TSP as an input device for various devices will gradually increase in schools, offices, and homes, which exceeds the demand for the field of existing electronic devices including not only notebook computers, all-in-one personal computers, and general displays, but also televisions, refrigerators, washing machines, and vehicles, and the like. There are various types of TSPs depending on the drying system, but since most personal electronic devices currently in the greatest demand employ a capacitive touch system, optical adhesive materials having physical properties required to manufacture the capacitive TSPs have been actively researched and developed.

The TSP has a structure in which a transparent electrode and a display module are located under a cover window, and in the early stage, the structure is a structure using an air gap between the cover window and the electrode, but at present, a full lamination system (or a direct bonding system) filled with an optical bonding material tends to be generalized. The optical bonding material used to bond each layer in the filling and laminating system structure may be broadly classified into an Optically Clear Adhesive (OCA) which is a transparent double-sided tape type and an optically clear resin (OCR, LOCA) which is a transparent liquid type. Here, the term optically transparent means that the material itself has a transmittance of 90% or more, and means a very transparent state.

Examples of the polymer used as the optical adhesive material include acrylic polymers, silicone-based polymers, urethane-based polymers, and the like, but acrylic polymers, which are easy to design and have very good transparency, can be rapidly cured by ultraviolet rays (UV), and have an advantage in economic aspects, and thus are most used. Since the silicone-based polymer has excellent heat resistance and the urethane-based material can control physical properties by combining the soft segment and the hard segment, each polymer has advantages.

The optical adhesive material can simply adhere each constituent layer, and also has an advantage in improving image quality. In the structure having the air gap, light from the backlight unit is reflected due to a refractive index difference between the air layer and the film layer, so that partial light loss occurs, which results in image blur as a whole, thereby causing image quality degradation.

However, when the air gap is filled with the optical adhesive material, the difference in refractive index between the film layer and the adhesive material is reduced, so that the loss of light from the backlight unit is also reduced, and as a result, a clear and bright image can be represented, thereby improving visibility. Further, since the gap is filled with the adhesive material, the optical adhesive material has an advantage even in terms of vibration resistance and impact resistance.

Accordingly, the market of optical adhesive materials is gradually expanding, and further research and development of optical adhesive materials will be required in the future.

Disclosure of Invention

Technical problem

In the case of manufacturing a thin image display device in which a UV curable resin composition is adhered between a protective unit and an image display unit, in the related art, deformation occurs on the image display unit due to internal stress caused by shrinkage at the time of curing the UV curable acrylic resin composition, and therefore, in some cases, display defects and non-uniformity (mura) are generated due to disorder of the alignment of a liquid crystal material, and thus, have recently become a problem. In addition, when a cured product of the acrylic UV curable resin composition of the related art is exposed to high temperature at the time of use, its transparency is lowered and sometimes the cured product is yellowed, and thus it is required to improve it. The present invention has been made in an effort to provide an optically transparent resin having advantages in that shrinkage is suppressed when cured, discoloration is not caused under long-term aging conditions, and a change in elastic modulus with a change in temperature is small, and an electronic component formed using the optically transparent resin.

Technical scheme

An exemplary embodiment of the present invention provides an optically transparent resin including:

1) a polyorganosiloxane resin represented by the following chemical formula 1; and

2) one or more photo-initiators,

wherein the refractive index of the optically transparent resin is 1.41 to 1.55:

[ chemical formula 1]

(R1SiO_3/2)_a(R2SiO_3/2)_b(R3₂SiO_2/2)_c(R4SiO_3/2)_d(Me₃SiO_1/2)_e

In chemical formula 1

R1 to R4 are identical to or different from each other and are each independently selected from the group consisting of hydrogen, alkyl groups, alkenyl groups, aryl groups, glycidyl groups, isocyanate groups, hydroxyl groups, carboxyl groups, vinyl groups, acrylate groups, methacrylate groups, epoxy groups, cyclic ether groups, sulfide groups, acetal groups, lactone groups, amide groups, alkylaryl groups, alkylglycidyl groups, alkylisocyanate groups, alkylhydroxyl groups, alkylcarboxyl groups, alkylvinyl groups, alkylacrylate groups, alkylmethacrylate groups, alkylcycloether groups, alkylsulfide groups, alkylalcetal groups, alkyllactone groups and alkylamide groups, and

the a: b: c: d: e are (0 to 60): 70 to 450: (0 to 60): 1 to 20 by weight ratio.

Further, another exemplary embodiment of the present invention provides an electronic component formed by using the optically transparent resin.

Advantageous effects

The optically transparent resin according to an exemplary embodiment of the present invention includes the polyorganosiloxane resin represented by chemical formula 1, and thus is characterized by excellent durability and excellent light transmittance. In addition, the optically transparent resin according to the exemplary embodiment of the present invention is characterized by having a fast photo-curing rate compared to the silicone material in the related art.

Detailed Description

Hereinafter, the present application will be described in detail.

When a cured product of the resin is cured and shrunk, stress causes deformation of a panel, disorder in orientation of a liquid crystal material, and the like, thereby causing unevenness, and the like, which results in that acrylic polymers in the related art are limited in use for large displays, but silicone has an effect of reducing defects due to low curing shrinkage and excellent long-term reliability itself.

Accordingly, the present invention has been made in an effort to provide a UV-curable silicone resin composition having advantages of: the UV curable silicone resin composition is inhibited from shrinking upon curing, does not discolor under long-term aging conditions, and has a small change in elastic modulus with temperature change.

The optically transparent resin according to an exemplary embodiment of the present invention includes: 1) a polyorganosiloxane resin represented by chemical formula 1; and 2) one or more photoinitiators, wherein the optically transparent resin has a refractive index of 1.41 to 1.55.

Generally, a resin having 2 oxygen atoms bonded to one silicon atom in the silicone-based resin refers to a D-type silicone-based resin, a resin having 3 oxygen atoms bonded to one silicon atom in the silicone-based resin refers to a T-type silicone-based resin, a resin having 1 oxygen atoms bonded to one silicon atom in the silicone-based resin refers to an M-type silicone-based resin, and a resin having 4 oxygen atoms bonded to one silicon atom in the silicone-based resin refers to a Q-type silicone-based resin. In the prior art, the D-type silicone-based resin or the T-type silicone-based resin has been used independently, or the D-type silicone-based resin and the T-type silicone-based resin are mixed with each other and used. However, the silicone-based resin such as chemical formula 1 according to the present invention is not a mixture of the D-type silicone-based resin and the T-type silicone-based resin in the related art, but includes both the D-type and T-type silicone-based resins in the silicone-based resin, and is a silicone-based resin different from the silicone-based resin in the related art.

A feature of an exemplary embodiment of the present invention is that by including both D-type and T-type in a silicone resin, an adhesive layer of appropriate strength can be obtained, and shrinkage of the optically transparent resin can be reduced during curing of the optically transparent resin.

In an exemplary embodiment of the present invention, (R1 SiO) in chemical formula 1_3/2)_aIs T-type, and may be derived from the following chemical formula 2.

[ chemical formula 2]

Further, in an exemplary embodiment of the present invention, (R2 SiO) in chemical formula 1_3/2)_bIs T-type, and may be derived from the following chemical formula 3.

[ chemical formula 3]

In addition, in an exemplary embodiment of the present invention, (R3) in chemical formula 1₂SiO_2/2)_cIs D-form, and may be derived from the following chemical formula 4.

[ chemical formula 4]

Further, in an exemplary embodiment of the present invention, (R4 SiO) in chemical formula 1_3/2)_dIs T-type, and may be derived from the following chemical formula 5.

[ chemical formula 5]

In chemical formulas 2 to 5, R1 to R4 are the same as defined in chemical formula 1.

In an exemplary embodiment of the present invention, R1 and R3 in chemical formulas 2 and 4 may each independently be an alkyl group.

The alkyl group may be linear or branched, and the number of carbon atoms thereof is not particularly limited, but is preferably 1 to 30. Specific examples thereof include methyl group, ethyl group, propyl group, n-propyl group, isopropyl group, butyl group, n-butyl group, isobutyl group, tert-butyl group, sec-butyl group, 1-methylbutyl group, 1-ethylbutyl group, pentyl group, n-pentyl group, isopentyl group, neopentyl group, tert-pentyl group, hexyl group, n-hexyl group, 1-methylpentyl group, 2-methylpentyl group, 4-methyl-2-pentyl group, 3-dimethylbutyl group, 2-ethylbutyl group, heptyl group, n-heptyl group, 1-methylhexyl group, cyclopentylmethyl group, cyclohexylmethyl group, octyl group, n-octyl group, tert-octyl group, 1-methylheptyl group, 2-ethylhexyl group, 2-propylpentyl group, n-nonyl group, 2-dimethylheptyl group, 1-ethylpropyl group, 1-dimethyl-propyl group, isohexyl group, 4-methylhexyl group, 5-methylhexyl, and the like, but are not limited thereto.

In an exemplary embodiment of the present invention, R2 of chemical formula 3 may be an acrylate group, a methacrylate group, an alkyl acrylate group, or an alkyl methacrylate group.

In one exemplary embodiment of the present specification, R4 of chemical formula 5 may be an aryl group.

The aryl group may be monocyclic or polycyclic, and the number of carbon atoms thereof is not particularly limited, but is preferably 6 to 30. Specific examples thereof include phenyl, biphenyl, terphenyl, naphthyl, benzophenanthryl, anthryl, phenanthryl, pyrenyl, perylenyl, perylene, and the like,A phenyl group, a fluorenyl group, and the like, but are not limited thereto.

In chemical formula 1, a: b: c: d: e are (0 to 60): 70 to 450: 0 to 60: 1 to 20, by weight ratio. b/(a + b + c + d + e) may range between 0.001 and 0.05, while d/(a + b + c + d + e) may range between 0.05 and 0.5. From the viewpoint of obtaining good curability, the range of b/(a + b + c + d + e) is preferably between 0.001 and 0.05, and more preferably the range of b/(a + b + c + d + e) is between 0.005 and 0.03. Further, by minimizing the difference in refractive index of each interface material so as to reduce the light loss caused by the interface irregular reflection, it is preferable that d/(a + b + c + d + e) range from 0.05 to 0.5. When d/(a + b + c + d + e) exceeds 0.5, the modulus increases to cause deformation of the panel, disorder in alignment of the liquid crystal material, and the like, thereby generating unevenness and the like.

The polyorganosiloxane resin may have a weight average molecular weight of 100 to 1,000,000 or 1,000 to 500,000, but the weight average molecular weight is not limited thereto.

In the present invention, the photoinitiator is thermally inert, but is excited by light irradiation to generate radicals, and the radicals impart excitation energy to the siloxane, thereby causing the curing reaction by UV curing to start. Examples of the photoinitiator include aromatic hydrocarbons, acetophenones and derivatives thereof, benzophenones and derivatives thereof, benzoylbenzoates, benzoins, benzoin ethers and derivatives thereof, xanthones and derivatives thereof, disulfides, quinone compounds, halogenated hydrocarbons and amines, organic peroxides, and the like, from the viewpoint of reactivity, and compounds containing substituted or unsubstituted benzoyl groups or compounds of organic peroxides are more preferable from the viewpoint of compatibility with silicon and stability. Examples thereof include acetophenone, propiophenone, 2-hydroxy-2-methylpropiophenone, 2-dimethoxy-1, 2-diphenylethan-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxy-cyclohexyl-phenylketone, 1- [4- (2-hydroxyethoxy) -phenyl ] -2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy-1- {4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl ] phenyl } -2-methyl-propan-1-one, 2-methyl-1- (4-methylthiophenyl) -2-morpholine Propan-1-one, 2-benzyl-2-dimethylamino- (4-morpholinophenyl) -butanone-1, 2- (dimethylamino) -2- [ (4-methylphenyl) methyl ] -1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) -phenylphosphine oxide, 1, 2-octanedione, 1- [4- (phenylthio) -,2- (O-benzoyloxime) ], ethanone, 1- [ 9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl ] -,1- (O-acetyloxime), oxyphenylacetic acid, a mixture of 2- [ 2-oxo-2-phenylacetoxyethoxy ] ethyl ester and oxyphenylacetic acid, 2- (2-hydroxyethoxy) ethyl ester, ethyl-4-dimethylaminobenzoate, 2-ethylhexyl-4-dimethylaminobenzoate, bis (2, 6-dimethoxybenzoyl) -2,4, 4-trimethyl-pentylphosphine oxide, benzoyl peroxide, and the like, but are not limited thereto. In addition, the photoinitiator may be used in the form of a mixture dissolved in a monomer known in the art in terms of compatibility with the resin. Specific examples of the monomer include acrylate-based monomers, methacrylate-based monomers, siloxane-based monomers, and the like, but are not limited thereto.

The content of the polyorganosiloxane resin may be 60 to 99 wt% based on the total weight of the optically transparent resin, but is not limited thereto.

The content of the photoinitiator mixture may be 1 to 40 wt% based on the total weight of the optically transparent resin, but is not limited thereto. When the content of the photoinitiator mixture is less than 1 wt% based on the total weight of the optically transparent resin, the following problems may occur: even if the optically transparent resin is irradiated with strong ultraviolet rays, curing does not proceed because of only a small amount of active radicals that promote curing, and when the content thereof exceeds 40 wt%, the service life of the electronic component may be shortened because degassing occurs under a temperature condition of less than 100 ℃ after curing.

The optically transparent resin according to an exemplary embodiment of the present invention is characterized by having a refractive index of 1.41 to 1.55. The refractive index is the ratio of the speed of light in vacuum to the speed of light in the material, i.e. the ratio of the angle of incidence of the light with respect to the material to the angle of refraction. The optically transparent resin is a resin in an intermediate step of bonding glass or a plastic cover or the like, and when the refractive index difference between the interfaces is large, light loss occurs due to reflection at the interface portion. Since the refractive index of glass generally used is 1.5 and the refractive index of PC/PMMA or the like is 1.59, it is necessary to use a material having a refractive index not much different from that of each interface. Since the refractive index of a typical methyl-based silicone is 1.4, the refractive index can be adjusted according to the branched R group of the pendant group. Therefore, it is important to design the optically transparent resin to have a refractive index of a similar level to that of the adhesive interface substrate as a method of minimizing light loss at each interface. Accordingly, the optically transparent resin according to an exemplary embodiment of the present invention may have a refractive index of 1.41 to 1.55. When the refractive index exceeds 1.55, the optically transparent resin becomes brittle, so cracks and the like are easily generated in a thermal shock test, and reliability problems such as an increase in yellowness index due to heat and light are easily caused. The refractive index can be measured by using an Abbe refractometer at 25 ℃ and a wavelength of 590 nm.

The optically transparent resin according to an exemplary embodiment of the present invention may further include a tackifier. The adhesion promoter may use a silicone-based compound or a silane-based compound that contains at least one hydrolyzable functional group (e.g., methoxy and ethoxy). More specifically, aminoalkoxysilanes, polymeric silanes, polymeric organosilanes, organofunctional silanes, vinyl ether urethane silanes, glycidoxypropyltrimethoxysilane, (meth) acrylate silanes, acryloxypropyltrimethoxysilane, acryloxypropylmethyl-dimethoxysilane, methacryloxypropyl-trimethoxysilane, methacryloxypropylmethyl-dimethoxysilane, and the like can be used as the tackifier, but are not limited thereto.

The optically transparent resin according to an exemplary embodiment of the present invention may include a polyorganosiloxane resin represented by chemical formula 1, a photoinitiator mixture, and a tackifier. In this case, the content of the polyorganosiloxane resin may be 60 to 95 wt%, the content of the photoinitiator mixture may be 1 to 30 wt%, and the content of the tackifier may be 0.5 to 10 wt%, based on the total weight of the optically transparent resin.

The optically transparent resin according to an exemplary embodiment of the present invention may additionally include a monomer known in the art in order to adjust the curing rate of the silicone resin material. Specific examples of the monomer include acrylate-based monomers, methacrylate-based monomers, siloxane-based monomers, and the like, but are not limited thereto.

Examples of the monomer include trimethylolpropane ethoxy triacrylate, (meth) acrylic acid tert-butyl ester, 1, 5-pentanediol di (meth) acrylate, N-diethylaminoethyl (meth) acrylate, ethylene glycol di (meth) acrylate, 1, 4-butanediol di (meth) acrylate, diethylene glycol di (meth) acrylate, hexamethylene glycol di (meth) acrylate, 1, 3-propanediol di (meth) acrylate, decanediol di (meth) acrylate, 1, 4-cyclohexanediol di (meth) acrylate, 2-dimethylolpropane di (meth) acrylate, glycerol di (meth) acrylate, tripropylene glycol di (meth) acrylate, glycerol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, propylene glycol di (meth), Pentaerythritol tri (meth) acrylate, polyoxyethylenated trimethylolpropane tri (meth) acrylate, 2-di- (p-hydroxyphenyl) propane diacrylate, pentaerythritol tetra (meth) acrylate, 2-di- (p-hydroxyphenyl) propane dimethacrylate, triethylene glycol diacrylate, polyoxyethylene-2, 2-di- (p-hydroxyphenyl) propane dimethacrylate, bis- (3-methacryloyloxy-2-hydroxypropyl) ether of bisphenol A, bis- (2-methacryloyloxyethyl) ether of bisphenol A, bis- (3-acryloyloxy-2-hydroxypropyl) ether of bisphenol A, bis- (2-acryloyloxyethyl) ether of bisphenol A, poly (ethylene glycol) acrylate, poly, Di- (3-methacryloyloxy-2-hydroxypropyl) ether of 1, 4-butanediol, triethylene glycol dimethacrylate, polyoxypropyltrimethylolpropane triacrylate, butanediol di (meth) acrylate, 1,2, 4-butanetriol tri (meth) acrylate, 2, 4-trimethyl-1, 3-pentanediol di (meth) acrylate, 1-phenylvinyl-1, 2-dimethacrylate, diallyl fumarate, styrene, 1, 4-benzenediol dimethacrylate, isobornyl acrylate, 1, 4-diisopropenylbenzene, 1,3, 5-triisopropenylbenzene, siloxane-based monomers, siloxane acrylate-based monomers, siloxane urethane-based monomers, and the like, but is not limited thereto.

Further, the optically transparent resin according to an exemplary embodiment of the present invention may include one or more silicone-based resin series in terms of adjusting modulus and improving adhesion.

As the silicone-based resin, one or more silicone-based resins selected from MQ resin, MDQ resin, MT resin, MDT resin, MDTQ resin, DQ resin, DTQ resin, and TQ resin (provided that the silicone-based resin does not contain aliphatic unsaturated groups and mercapto groups) are preferable in terms of adhesion and economic feasibility, one or more silicone-based adhesion improvers selected from MQ resin, MDQ resin, MDT resin, MDTQ resin are more preferable in terms of flowability and ease of synthesis, and MQ resin is more preferable in terms of ease of control of adhesive strength and structure.

The above MQ resin may include a silicone-based resin represented by the following chemical formula 6.

[ chemical formula 6]

(R5₃SiO_1/2)_h(SiO_4/2)_i

In the chemical formula 6, the first and second,

each R5 is independently a substituted or unsubstituted hydrocarbon,

h + i is 1, while neither h nor i is 0.

In an exemplary embodiment of the present invention, R5 in chemical formula 6 may be an alkyl group or an aryl group.

In exemplary embodiments of the present invention, the content of the silicone-based resin represented by chemical formula 6 may be greater than 0 wt% and less than 15 wt% based on the total weight of the optically transparent resin.

In addition, the optically transparent resin according to the exemplary embodiment of the present application may include one or more additives, such as a stress modifier, a viscosity modifier, a curing agent, a dispersant, a stabilizer, and a radical stabilizer, depending on the use thereof. These additives may be used alone or in a mixture of two or more thereof.

Further, the electronic component according to the exemplary embodiment of the present invention is characterized by being formed by using the optically transparent resin. The optically transparent resin according to the present invention has excellent adhesion and flexibility, high initial transmittance, and high heat/light-resistant transparency, and thus is particularly suitable for use in components related to optical devices or components related to display devices. More specifically, the optically transparent resin according to the present invention can be used for adhesion in various flat panel displays such as liquid crystal panels, and is particularly suitable for use as an adhesive material in the manufacture of large-sized displays.

[ modes for the invention ]

Hereinafter, the present specification will be described in more detail by way of examples. However, the following examples are provided only for illustrating the present specification and are not intended to limit the present specification.

< Synthesis example 1>

Methyltrimethoxysilane (0.147 mol%, CAS #1185-55-3), phenyltrimethoxysilane (0.076 mol%, CAS #2996-92-1), methacryloxypropyltrimethoxysilane (0.05 mol%, CAS #2530-85-0), hexamethyldisiloxane (0.049 mol%, CAS #107-46-0), and dimethyldimethoxysilane (0.341 mol%, CAS #1112-39-6) were mixed at room temperature for 30 minutes and then reacted at 120 ℃ for 4 hours in the presence of a sulfuric acid catalyst (0.001 mol%). Thereafter, the resulting product was washed with dilute aqueous NaOH and neutralized with acetic acid (CAS #64-19-7) and stripped to yield the final polymer resin a 1.

< Synthesis example 2>

A polymer resin A2 was obtained in the same manner as in Synthesis example 1, except that 0.10 mol% of methacryloxypropyltrimethoxysilane was used in Synthesis example 1.

< Synthesis example 3>

A polymer resin A3 was obtained in the same manner as in Synthesis example 1, except that 0.15 mol% of methacryloxypropyltrimethoxysilane was used in Synthesis example 1.

< example >

The optically transparent resin according to the present invention is blended and produced by the following method. First, a Photoinitiator (PI) mixture was prepared by: in a yellow room treated with impurities in the air, bis (2,4, 6-trimethylbenzoyl) -phenylphosphine oxide, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and isobornyl acrylate were placed in a ratio of 9.4 wt% to 15.6 wt% to 75.0 wt% in a 1L stirrer equipped with a temperature rise/pressure drop degasser, and the resulting mixture was stirred at 50 ℃ for 6 hours, and then the mixture was filtered using a membrane filter having a pore size of 2 μm.

The optically transparent resin of the present invention was manufactured by mixing the constituent components in the following table 1. More specifically, in a room in which impurities in the air were treated, the polymer resin and the tackifier were introduced into a 5L universal mixing agitator equipped with a vacuum degassing apparatus, and the resulting mixture was uniformly mixed at low speed for 30 minutes at room temperature. Thereafter, the optically transparent resin of the present invention was prepared by the following method: in the yellow chamber, the reaction caused by light is suppressed by introducing a photoinitiator mixture and various additives into a reactor, uniformly mixing and degassing the resultant mixture at a low speed for 30 minutes, and then filtering the mixture using a membrane filter or the like having a pore size of 10 μm or less. In Table 1 below, all contents are in wt%.

[ Table 1]

< Experimental example >

< conditions for evaluating physical Properties >

The physical properties were evaluated as follows, and the results are shown in Table 2 below.

(1) Refractive index: measured at 25 ℃ and 590nm using an Abbe refractometer.

(2) And (3) permeability: using a metal halide lamp at 100mW/cm²The test sample was manufactured and the hardness of the cured product was measured at 23 c using a mini penetrometer.

(3) Gel point: a point where the storage elastic modulus (G') and the loss elastic modulus (G ") cross each other is taken as a gel point by irradiation with UV in the UVA wavelength range using an optical rheometer (omni cure), and energy is input.

(4) Transmittance: by using a UV-Vis spectrometer and a metal halide lamp manufactured by Shimadzu Corporation at 100mW/cm²To manufacture a test piece having a thickness of 180 μm, and measured using these apparatuses.

(5) Curing shrinkage rate: the specific gravity of the optically transparent resin before and after curing was measured and calculated from the difference in specific gravity between the two.

(6) Modulus: saturated storage elastic modulus (G') values were obtained by irradiation with UV in the UVA wavelength range using an optical rheometer (omni cure).

(7) Non-uniformity: when the panel operation test was performed by actually adhering the optically transparent resin to the 10-inch display panel, the case where no unevenness occurred was indicated as OK, and the case where unevenness occurred was indicated as NG.

[ Table 2]

< durability test >

The durability was evaluated as follows, and the results are shown in table 3 below.

A test specimen of glass/glass adhesion for durability test was prepared, and the test specimen was subjected to the following conditions: high temperature (85 ℃, 500 hours), high temperature and high humidity (85 ℃/85% RH, 500 hours), thermal shock (-40 ℃ to 85 ℃ for 30 minutes, 500 cycles) and QUV (340nm, 300 hours), and then Yellowness Index (YI) and appearance change were confirmed. The occurrence of a defect such as peeling or cracking was NG and the absence of a reliability defect was OK by confirming the change in appearance.

[ Table 3]

It was confirmed that the optically transparent resin according to the exemplary embodiment of the present invention includes the polyorganosiloxane resin represented by chemical formula 1, and as a result, the optically transparent resin has a fast photocuring rate and a good light yellowing index, compared to the material of comparative example 1 using the mercapto type. Further, it can be confirmed that the optically transparent resin according to the exemplary embodiment of the present invention has a fast photo-curing rate and relatively low curing shrinkage and modulus compared to the materials of comparative examples 2 and 3 including methacrylate or acrylate reactive groups at both ends, and thus, the optically transparent resin has a low yellowness index under long-term aging conditions, and a small change in elastic modulus due to a change in temperature, and thus has excellent reliability under thermal shock conditions.