阅读说明：本技术 聚碳酸酯树脂 (Polycarbonate resin ) 是由 石川骏 小川典庆 于 2020-03-30 设计创作，主要内容包括：本发明提供一种具有紫外线吸收能力的末端改性聚碳酸酯树脂。更详细而言,提供一种具有通式(A)所示的结构和源自二元酚的结构单元的末端改性聚碳酸酯树脂(上述通式(A)中,R-(1)表示氢或碳原子数1～6的烷基,R-(2)表示碳原子数1～6的亚烷基,R-(3)表示氢或甲基,R-(4)表示氢或卤素,＊表示与聚碳酸酯树脂的主链的键合位置)。(The present invention provides a terminal-modified polycarbonate resin having ultraviolet absorption ability. More specifically, provided is a terminal-modified polycarbonate resin having a structure represented by the general formula (A) below and a structural unit derived from a dihydric phenol (in the general formula (A) above, R is 1 Represents hydrogen or alkyl having 1 to 6 carbon atoms, R 2 Represents an alkylene group having 1 to 6 carbon atoms, R 3 Represents hydrogen or methyl, R 4 Represents hydrogen or halogen, and represents a bonding position with the main chain of the polycarbonate resin).)

1. A terminal-modified polycarbonate resin characterized in that,

having a structure represented by the general formula (A) and a structural unit derived from a dihydric phenol,

in the above general formula (A), R₁Represents hydrogen or alkyl having 1 to 6 carbon atoms, R₂Represents an alkylene group having 1 to 6 carbon atoms, R₃Represents hydrogen or methyl, R₄Represents hydrogen or halogen, and represents a bonding position with the main chain of the polycarbonate resin.

2. The terminal-modified polycarbonate resin according to claim 1,

the viscosity average molecular weight is 10,000-60,000.

3. The terminal-modified polycarbonate resin according to claim 1 or 2,

having a structural unit represented by the following general formula (1) wherein the terminal group is represented by the general formula (A),

in the formula (1), R₅～R₈Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, or an alkenyl group having 2 to 15 carbon atoms which may have a substituent,

x is-O-, -S-, -SO₂-, -CO-, or a divalent group represented by any one of the following general formulae (3) to (6);

in the general formulae (3) to (6), R₉And R₁₀Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₉And R₁₀Bonding the two to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

c represents an integer of 0 to 20;

R₁₁and R₁₂Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₁₁And R₁₂Bonding the two to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

R₁₃～R₁₆each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₁₃And R₁₄And R₁₅And R₁₆Are respectively bonded with each other to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

R₁₇～R₂₆each independently represents hydrogen or an alkyl group having 1 to 3 carbon atoms, R₁₇～R₂₆At least one of them is an alkyl group having 1 to 3 carbon atoms.

4. The terminal-modified polycarbonate resin according to claim 3,

x is a divalent group represented by the general formula (3).

5. The terminal-modified polycarbonate resin according to claim 3 or 4,

the dihydric phenol is a bisphenol compound.

6. The terminal-modified polycarbonate resin according to claim 5,

the bisphenol compound is selected from bisphenol A, bisphenol AP, bisphenol Z, bisphenol CD, bisphenol C, bisphenol IOTD, bisphenol IBTD and bisphenol MIBK.

7. The terminal-modified polycarbonate resin according to any one of claims 3 to 6,

the terminal structure represented by the general formula (A) is represented by the following formula (7),

in the above general formula (7), the bonding position to the main chain of the polycarbonate resin is shown.

8. The terminal-modified polycarbonate resin according to any one of claims 1 to 7,

contains 0.5 mass% or more of a terminal structure represented by the general formula (A) relative to a structural unit derived from the dihydric phenol.

9. The terminal-modified polycarbonate resin according to any one of claims 1 to 8,

the transmittance of light at 330nm is 1% or less.

Technical Field

The present invention relates to a novel terminal-modified polycarbonate resin.

Background

As the polycarbonate having terminal reactivity, there are polycarbonates having vinyl terminals or conjugated double bonds (patent documents 1 and 2). They have ultraviolet absorbability, but have a disadvantage that they react with outdoor ultraviolet rays to polymerize due to high reactivity, and the activity is lost and the function as an ultraviolet absorber is gradually lost. In addition, a polycarbonate having a triazole or benzophenone type ultraviolet absorber at the terminal is known (patent document 3). However, these ultraviolet absorbers have low reactivity as a reactive group although they exhibit excellent weather resistance, and are not suitable as a raw material for producing a block copolymer with another resin or a reactive resin modifier.

As the terminal-modified polycarbonate resin, a terminal-modified polycarbonate oligomer in which a terminal is terminated with a chalcone derivative (patent document 4), a polycarbonate resin having a terminal group having a specific structure including a benzotriazole ring (patent document 5), and the like are known, but development of a novel terminal-modified polycarbonate resin has been desired.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 55-9696

Patent document 2: japanese laid-open patent publication No. 61-141726

Patent document 3: japanese laid-open patent publication No. S49-99596

Patent document 4: japanese laid-open patent publication No. 6-256493

Patent document 5: japanese laid-open patent publication No. 9-316187

Disclosure of Invention

Problems to be solved by the invention

It is desired to develop a novel terminal-modified polycarbonate resin having excellent ultraviolet absorption ability.

Means for solving the problems

The present inventors have conducted extensive studies and as a result, have developed a novel terminal-modified polycarbonate resin having excellent ultraviolet absorption ability, and have completed the present invention.

That is, the present invention includes the following embodiments.

(1) A terminal-modified polycarbonate resin having a structure represented by the general formula (A) and a structural unit derived from a dihydric phenol.

(in the above general formula (A), R₁Represents hydrogen or alkyl having 1 to 6 carbon atoms, R₂Represents an alkylene group having 1 to 6 carbon atoms, R₃Represents hydrogen or methyl, R₄Represents hydrogen or halogen, and represents a bonding position with the main chain of the polycarbonate resin. )

(2) The terminal-modified polycarbonate resin according to the item (1), wherein the viscosity average molecular weight is 10,000 to 60,000.

(3) The terminal-modified polycarbonate resin according to the above (1) or (2), which has a structural unit represented by the following general formula (1) and has a terminal group represented by the general formula (A).

(in the formula, R₅～R₈Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, or an alkenyl group having 2 to 15 carbon atoms which may have a substituent,

x is-O-, -S-, -SO₂-, -CO-, or a divalent group represented by any one of the following general formulae (3) to (6). )

(in the general formulae (3) to (6), R₉And R₁₀Each independently represents hydrogen, halogen, may have a substituentAn alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₉And R₁₀Bonding the two to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

c represents an integer of 0 to 20;

R₁₁and R₁₂Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₁₁And R₁₂Bonding the two to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

R₁₃～R₁₆each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₁₃And R₁₄And R₁₅And R₁₆Are respectively bonded with each other to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

R₁₇～R₂₆each independently represents hydrogen or an alkyl group having 1 to 3 carbon atoms, R₁₇～R₂₆At least one of them is an alkyl group having 1 to 3 carbon atoms. )

(4) The terminal-modified polycarbonate resin according to the above (3), wherein X is a divalent group represented by the general formula (3).

(5) The terminal-modified polycarbonate resin according to the item (3) or (4), wherein the dihydric phenol is a bisphenol compound.

(6) The terminal-modified polycarbonate resin according to the above (5), wherein the bisphenol compound is selected from the group consisting of bisphenol A, bisphenol AP, bisphenol Z, bisphenol CD, bisphenol C, bisphenol IOTD, bisphenol IBTD and bisphenol MIBK.

(7) The terminal-modified polycarbonate resin according to any one of the above (3) to (6), wherein the terminal structure represented by the above general formula (A) is represented by the following formula (7).

(in the general formula (7), the symbol denotes a bonding position with the main chain of the polycarbonate resin.)

(8) The polycarbonate resin according to any one of (1) to (7) above, which contains 0.5 mass% or more of a terminal structure represented by the general formula (A) with respect to the structural unit derived from the dihydric phenol.

(9) The polycarbonate resin according to any one of (1) to (8) above, wherein the transmittance of light at 330nm is 1% or less.

Effects of the invention

According to the present invention, a novel terminal-modified polycarbonate resin having excellent ultraviolet absorbability can be obtained.

Detailed Description

The present invention will be described in detail below.

1. Terminal-modified polycarbonate resin

The present invention provides a terminal-modified polycarbonate resin having a structure represented by general formula (A) and a structural unit derived from a dihydric phenol.

(in the above general formula (A), R₁Represents hydrogen or alkyl having 1 to 6 carbon atoms, R₂Represents an alkylene group having 1 to 6 carbon atoms, R₃Represents hydrogen or methyl, R₄Represents hydrogen or halogen, and represents a bonding position with the main chain of the polycarbonate resin. )

The terminal-modified polycarbonate resin of the present invention may be a terminal-modified polycarbonate resin having a structural unit represented by the following general formula (1) and having a terminal group represented by the general formula (a).

(in the formula, R₅～R₈Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, or an alkenyl group having 2 to 15 carbon atoms which may have a substituent,

x is-O-, -S-, -SO₂-, -CO-, or a divalent group represented by any one of the following general formulae (3) to (6). )

(in the general formulae (3) to (6), R₉And R₁₀Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₉And R₁₀Bonding the two to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

c represents an integer of 0 to 20;

R₁₁and R₁₂Each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, or an alkenyl group having 2 to 15 carbon atoms which may have a substituentOr R is₁₁And R₁₂Bonding the two to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

R₁₃～R₁₆each independently represents hydrogen, halogen, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group having 1 to 5 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, an aralkyl group having 7 to 17 carbon atoms which may have a substituent, an alkenyl group having 2 to 15 carbon atoms which may have a substituent, or R₁₃And R₁₄And R₁₅And R₁₆Are respectively bonded with each other to form a carbon ring with 3-20 carbon atoms or a heterocyclic ring with 1-20 carbon atoms;

R₁₇～R₂₆each independently represents hydrogen or an alkyl group having 1 to 3 carbon atoms, R₁₇～R₂₆At least one of them is an alkyl group having 1 to 3 carbon atoms. )

In one embodiment of the present invention, X in the structural unit represented by the above general formula (1) may be a divalent group represented by the general formula (3).

In one embodiment of the present invention, the dihydric phenol may be a bisphenol compound. Examples of the bisphenol compound used as the dihydric phenol in the present invention include 2, 2-bis (4-hydroxy-3, 5-dibromophenyl) propane, 2-bis (4-hydroxy-3, 5-dichlorophenyl) propane, 2-bis (4-hydroxy-3-bromophenyl) propane, 2-bis (4-hydroxy-3-chlorophenyl) propane, 2-bis (4-hydroxy-3-methylphenyl) propane, 2-bis (4-hydroxy-3, 5-dimethylphenyl) propane, 1-bis (4-hydroxyphenyl) -1-phenylethane, bis (4-hydroxyphenyl) diphenylmethane, α, ω -bis [ 3- (O-hydroxyphenyl) propyl ] polydimethylsiloxane, 2-bis (4-hydroxyphenyl) propane (bisphenol a, BPA), 1-bis (4-hydroxyphenyl) -1-phenylethane (bisphenol AP), and bisphenol AP), 2, 2-bis (4-hydroxyphenyl) butane (bisphenol B, BPB), bis (4-hydroxyphenyl) diphenylmethane (bisphenol BP), bisphenol CD, 2-bis (3-methyl-4-hydroxyphenyl) propane (bisphenol C), 1-bis (4-hydroxyphenyl) ethane (bisphenol E), bis (4-hydroxyphenyl) methane (bisphenol F), 2-bis (4-hydroxy-3-isopropylphenyl) propane (bisphenol G), 1-bis (4-hydroxyphenyl) -2-ethylhexane (bisphenol IOTD), 1-bis (4-hydroxyphenyl) -2-methylpropane (bisphenol IBTD), and 1, 1-bis (4-hydroxyphenyl) -2-methylpentane (bisphenol MIBK), 5 '- (1-methylethylidene) -bis [1,1' - (biphenyl) -2-ol ] propane (bisphenol PH) 1, 1-bis (4-hydroxyphenyl) -3, 3, 5-trimethylcyclohexane (bisphenol TMC), 1-bis (4-hydroxyphenyl) cyclohexane (bisphenol Z, BPZ), but are not limited thereto. In a preferred embodiment of the present invention, the bisphenol compound may be selected from bisphenol a, bisphenol AP, bisphenol Z, bisphenol CD, bisphenol C, bisphenol IOTD, bisphenol IBTD and bisphenol MIBK. In one embodiment of the present invention, 1 kind of the dihydric phenol may be used alone, or 2 or more kinds may be used in combination.

The monophenol (also referred to as "end terminator a") which is a precursor of the structure represented by the above general formula (a) is readily commercially available as an ultraviolet absorber. In one embodiment of the present invention, 1 or more of the above monohydric phenols may be used alone or in combination.

In a preferred embodiment of the present invention, the terminal structure represented by the above general formula (a) may be a structure represented by the following formula (7).

(in the general formula (7), the symbol denotes a bonding position with the main chain of the polycarbonate resin.)

In one embodiment of the present invention, the terminal structure represented by the general formula (a) is preferably contained in an amount of 0.5 to 15% by mass based on the structural unit derived from the dihydric phenol. The terminal structure represented by the general formula (a) is contained in an amount of preferably 1 to 10% by mass, more preferably 2 to 10% by mass, and particularly preferably 3 to 7% by mass, based on the structural unit derived from the dihydric phenol.

In one embodiment of the present invention, the terminal-modified polycarbonate resin may include any of a random copolymer structure, a block copolymer structure, and an alternating copolymer structure.

In one embodiment of the present invention, the terminal-modified polycarbonate resin may be blended with other resins to prepare a terminal-modified polycarbonate resin composition. Examples of the other resin include, but are not limited to, polyamide, polyacetal, polycarbonate, modified polyphenylene ether, polyethylene terephthalate, and polybutylene terephthalate.

In one embodiment of the present invention, the terminal-modified polycarbonate resin may be added with an antioxidant and a mold release agent as additives to prepare a terminal-modified polycarbonate resin composition.

As the antioxidant, triethylene glycol-bis [ 3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate ], 1, 6-hexanediol-bis [ 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], pentaerythritol-tetrakis [ 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], octadecyl-3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, 1,3, 5-trimethyl-2, 4, 6-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene, N-hexamethylenebis (3, 5-di-tert-butyl-4-hydroxy-hydrocinnamide), 3, 5-di-tert-butyl-4-hydroxy-benzylphosphonate-diethyl ester, tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanurate and 3, 9-bis {1, 1-dimethyl-2- [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2, 4,8, 10-tetraoxaspiro (5,5) undecane, and the like.

The content of the antioxidant in the terminal-modified polycarbonate resin composition is preferably 0.50% by mass or less, more preferably 0.10 to 0.40% by mass, and particularly preferably 0.20 to 0.40% by mass.

As the release agent, 90% by mass or more of a release agent composed of an ester of an alcohol and a fatty acid is preferable. Specific examples of the ester of an alcohol and a fatty acid include an ester of a monohydric alcohol and a fatty acid, and a partial or full ester of a polyhydric alcohol and a fatty acid. The ester of a monohydric alcohol and a fatty acid is preferably an ester of a monohydric alcohol having 1 to 20 carbon atoms and a saturated fatty acid having 10 to 30 carbon atoms. The partial or full ester of a polyhydric alcohol and a fatty acid is preferably a partial or full ester of a polyhydric alcohol having 1 to 25 carbon atoms and a saturated fatty acid having 10 to 30 carbon atoms.

Specifically, examples of the ester of a monohydric alcohol and a saturated fatty acid include stearyl stearate, palmityl palmitate, butyl stearate, methyl laurate, and isopropyl palmitate. Examples of the partial esters or full esters of polyhydric alcohols and saturated fatty acids include full esters or partial esters of dipentaerythritol such as stearic acid monoglyceride, stearic acid diglyceride, stearic acid triglyceride, stearic acid sorbitan ester, behenic acid monoglyceride, capric acid monoglyceride, lauric acid monoglyceride, pentaerythritol monostearate, pentaerythritol tetrastearate, pentaerythritol tetrapelargonate, propylene glycol monostearate, biphenyl dicarboxylate, sorbitan monostearate, 2-ethylhexyl stearate, and dipentaerythritol hexastearate.

In the terminal-modified polycarbonate resin composition, the content of the release agent is preferably 0.50% by mass or less, more preferably 0.01 to 0.10% by mass, and particularly preferably 0.03 to 0.05% by mass.

In addition, as other additives, a processing stabilizer, an ultraviolet absorber, a fluidity modifier, a crystal nucleating agent, a reinforcing agent, a dye, an antistatic agent, a bluing agent, an antibacterial agent, and the like may be added to the terminal-modified polycarbonate resin composition of the present invention.

2. Process for producing terminal-modified polycarbonate resin

In one embodiment of the present invention, the terminal-modified polycarbonate resin can be produced by the same method as the conventional method for producing a polycarbonate resin, except that a terminal terminator is used.

The method comprises the following steps: in the interfacial polymerization method, a dihydric phenol compound is reacted with phosgene in the presence of an inert organic solvent and an aqueous alkali solution, and then a terminal terminator and a polymerization catalyst such as tertiary amine or quaternary ammonium salt are added to carry out polymerization; in the pyridine method, a bisphenol compound and a terminal terminator are dissolved in pyridine or a mixed solution of pyridine and an inert solvent, and phosgene is blown into the solution to directly obtain a polycarbonate oligomer. The interfacial polymerization method may be a method in which the above-mentioned end terminator is added during the reaction of the dihydric phenol compound with phosgene.

3. Physical Properties of terminal-modified polycarbonate resin

(A) Viscosity average molecular weight (Mv)

In one embodiment of the present invention, the viscosity average molecular weight (Mv) of the terminal-modified polycarbonate resin is preferably 10,000 to 60,000. The viscosity average molecular weight (Mv) of the terminal-modified polycarbonate is more preferably 13,000 to 50,000, still more preferably 15,000 to 40,000, still more preferably 20,000 to 35,000, and particularly preferably 25,300 to 33,500. When the viscosity average molecular weight (Mv) of the polycarbonate is within the above range, the molded article can be prevented from becoming brittle, the melt viscosity does not become too high, the resin after production can be easily taken out, the fluidity can be improved, and injection molding in a molten state can be easily performed.

The viscosity-average molecular weight (Mv) was measured under the following conditions, and the intrinsic viscosity [. eta. ] deciliter/gram was determined by the Harins constant of 0.45 and calculated by the following equation.

The measurement device: ubbelohde capillary viscometer

Solvent: methylene dichloride

Resin solution concentration: 0.5 g/dl

Measurement temperature: 25 deg.C

η＝1.23×10^-4×Mv^0.83

(B) Transmittance at 330nm

In one embodiment of the present invention, the transmittance of 330nm light of the terminal-modified polycarbonate resin may be 1% or less. The transmittance of 330nm light of the terminal-modified polycarbonate resin of the present invention is preferably 0.5% or less, and more preferably 0.1 or less. When the light transmittance at 330nm is within the above range, the terminal-modified polycarbonate resin having both excellent ultraviolet absorptivity and light stability can be practically used.

The 330nm transmittance was obtained by performing zero point correction using a methylene chloride solvent at 330nm under the following conditions, and then measuring the transmittance of the resin solution.

The measurement device: UV-1280 ultraviolet-visible spectrophotometer manufactured by Shimadzu corporation

Solvent: methylene dichloride

Resin solution concentration: 10 w/w%

Test cell: 1cm quartz test cell

Photometric mode.

(C) Infrared absorption (IR) spectroscopy

At 1640cm in the IR spectrum^-1And 1720cm^-1Absorption of C ═ N stretching vibration and N ═ N stretching vibration from the end terminator a was confirmed, and it was confirmed that they entered the ends of the polycarbonate resin.

IR Spectroscopy Using FT/IR-400 + manufactured by Nippon spectral Co., Ltd, a measurement wave number range of 4000 to 650cm was determined by a thin film method^-1Measured to obtain. The film was prepared by dissolving a polycarbonate resin in methylene chloride and molding the solution.

Examples

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

< production and physical Property analysis of terminal-modified polycarbonate resin >

The terminal-modified polycarbonate resin was produced by the following method, and the obtained resin was analyzed for viscosity average molecular weight (Mv), transmittance at 330nm, and infrared absorption (IR) spectrum.

< example 1 >

To 600ml of a 9 w/w% aqueous solution of sodium hydroxide and 200ml of pure water were added 100g of NIPPON STEEL Chemical & Material Co., Ltd. (bisphenol A) (BPA) and 0.5g of dithionite and dissolved. To this was added 330ml of methylene chloride, and while stirring, the solution temperature was kept in the range of 15 to 25 ℃ and 59.7g of phosgene was blown in over 30 minutes.

After completion of the phosgene blowing, 100ml of a 9 w/w% aqueous solution of sodium hydroxide, 200ml of methylene chloride, and 3.3g of an Otsuka chemical RUVA-93 (end terminator A) dissolved in 50ml of methylene chloride were added thereto, and the mixture was emulsified by vigorous stirring, and then 0.5ml of Triethylamine (TEA) as a polymerization catalyst was added thereto and polymerized for about 40 minutes.

The polymerization solution was separated into a water phase and an organic phase, the organic phase was neutralized with phosphoric acid, and washing with pure water was repeated until the pH of the washing solution became neutral. The organic solvent is evaporated from the resulting polycarbonate resin solution to obtain a polycarbonate resin powder.

(analysis results)

Mv was 33,500, and the 330nm transmittance was 0.1%. In addition, 1640cm in the IR spectrum^-1And 1720cm^-1Absorption of C ═ N stretching vibration and N ═ N stretching vibration from the end terminator a was confirmed, and it was confirmed that they entered the ends of the polycarbonate resin.

< example 2 >

Synthesis was carried out in the same manner as in example 1 except that BPA was changed to 87g of bisphenol AP manufactured by chemical industries, Ltd.and the amount of the terminal stopper A was changed to 3.2 g.

(analysis results)

Mv was 27,200, and the 330nm transmittance was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 3 >

Synthesis was carried out in the same manner as in example 1 except that BPA was changed to 90g of bisphenol Z manufactured by chemical industries, Ltd., and the amount of the terminal stopper A was changed to 3.6 g.

(analysis results)

Mv was 22,300, and the 330nm transmittance was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 4 >

Synthesis was carried out in the same manner as in example 1 except that BPA was changed to 130g of bisphenol cyclododecane (bisphenol CD) manufactured by chemical industries, Ltd., Japan, and the amount of the terminal stopper A was changed to 1.75 g.

(analysis results)

Mv was 33,500, and the 330nm transmittance was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 5 >

Synthesis was carried out in the same manner as in example 1, except that 61.3g of bisphenol C manufactured by Nippon chemical industries, Ltd. was used in addition to 41.2g of BPA, and the amount of the terminal stopper A was changed to 4.05 g.

(analysis results)

Mv was 29,200, and the transmission at 330nm was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 6 >

Synthesis was carried out in the same manner as in example 1 except that BPA was changed to 90g of bisphenol MIBK manufactured by chemical industries, Ltd.A terminal stopper A was changed to 3.58 g.

(analysis results)

Mv was 25,300, and the transmission at 330nm was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 7 >

Synthesis was carried out in the same manner as in example 1 except that BPA was changed to 90g of bisphenol IOTD manufactured by chemical industries, Ltd.A terminal stopper A was changed to 3.25 g.

(analysis results)

Mv was 26,600, and the 330nm transmittance was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 8 >

Synthesis was carried out in the same manner as in example 1 except that BPA was changed to 80g of bisphenol IBTD manufactured by chemical industries, Ltd. in Japan, and the amount of the terminal stopper A was changed to 3.55 g.

(analysis results)

Mv was 25,200, and the transmission at 330nm was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 9 >

Synthesis was carried out in the same manner as in example 1 except that BPA was changed to 100g of bisphenol CD manufactured by chemical industry of China and 19.2g of bisphenol MIBK manufactured by chemical industry of China, and that end terminator A was changed to 4.41 g.

(analysis results)

Mv was 18,200, and the transmission at 330nm was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< example 10 >

Synthesis was carried out in the same manner as in example 9, except that the amount of the terminal terminator A was changed to 7.17 g.

(analysis results)

Mv was 13,200, and the transmittance at 330nm was 0.1%. The entry into the end was confirmed from the IR spectrum in the same manner as in example 1.

< comparative example 1 >

Synthesis was carried out in the same manner as in example 1, except that the terminal terminator A was changed to p-tert-butylphenol (PTBP)1.55 g.

(analysis results)

Mv was 32,500, and the transmission at 330nm was 98.3%. In the IR spectrum, it is not at 1640cm^-1And 1720cm^-1Absorption was confirmed.

< comparative example 2 >

Synthesis was carried out in the same manner as in example 5 except that the end terminator A was changed to 1.73g of Milex PM (end terminator B), manufactured by Mitsui chemical Co., Ltd.

(analysis results)

Mv was 24,100, and the 330nm transmittance was 39.1%. In the IR spectrum, it is not at 1640cm^-1And 1720cm^-1Absorption was confirmed.

< comparative example 3 >

Synthesis was carried out in the same manner as in example 2 except that the terminal-stopping agent A was changed to p-tert-butylphenol (1.73 g).

(analysis results)

Mv was 21,000 and 330nm transmission 89.5%. In the IR spectrum, it is not at 1640cm^-1And 1720cm^-1Absorption was confirmed.

< comparative example 4 >

Synthesis was carried out in the same manner as in example 3, except that the terminal-terminator A was changed to p-tert-butylphenol (1.65 g).

(analysis results)

The Mv was 20,000 and the 330nm transmission was 92.6%. In the IR spectrum, it is not at 1640cm^-1And 1720cm^-1Absorption was confirmed.

< comparative example 5 >

Synthesis was carried out in the same manner as in example 4 except that the terminal-stopping agent A was changed to p-tert-butylphenol (1.6 g).

(analysis results)

The Mv was 18,000 and the 330nm transmission was 76.7%. In the IR spectrum, it is not at 1640cm^-1And 1720cm^-1Absorption was confirmed.

The above analysis results are summarized in table 1 below.

[ Table 1]

As shown in Table 1, the terminal-modified polycarbonate resin of the present invention has extremely low transmittance at 330nm and excellent ultraviolet absorbability.