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Resin composition for optical material, optical film, and liquid crystal display device

A resin composition and optical material technology, applied in optics, optical components, nonlinear optics, etc., can solve problems such as small optical films and difficulty in obtaining photoelastic coefficients

Active Publication Date: 2017-09-05
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if the optical material disclosed in Patent Document 1 is used, it is difficult to obtain an optical film having a sufficiently small photoelastic coefficient.

Method used

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  • Resin composition for optical material, optical film, and liquid crystal display device
  • Resin composition for optical material, optical film, and liquid crystal display device
  • Resin composition for optical material, optical film, and liquid crystal display device

Examples

Experimental program
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Effect test

Embodiment

[0103] Hereinafter, based on an Example, this invention is demonstrated more concretely. Parts and % in examples are based on mass unless otherwise specified.

[0104] Synthesis Example 1 [Synthesis of Compound (B)]

[0105] In a 1-liter four-necked flask equipped with a thermometer, a stirrer, a reflux condenser and a nitrogen inlet pipe, add 299 g of tetramethylbiphenol type epoxy resin (epoxy equivalent 187), 195 g of benzoic acid and triphenyl as a catalyst 1 g of phosphine was reacted at 115° C. for 20 hours to obtain the compound (B1) represented by the aforementioned general formula (1-1). The compound (B1) had an acid value of 0.7 and a hydroxyl value of 178.

Synthetic example 2

[0106] Synthesis example 2 (same as above)

[0107] In a 1-liter four-necked flask equipped with a thermometer, a stirrer, a reflux condenser, and a nitrogen inlet tube, add 299 g of tetramethylbiphenol type epoxy resin (epoxy equivalent 187), 195 g of phenol, and triphenyl triphenyl as a catalyst. Phosphine 1 g was reacted at 115° C. for 20 hours to obtain the compound (B2) represented by the aforementioned general formula (1-2). The compound (B2) had an acid value of 0.7 and a hydroxyl value of 178.

Synthetic example 3

[0108] Synthesis example 3 (same as above)

[0109] In a 1-liter four-necked flask equipped with a thermometer, a stirrer, a reflux condenser, and a nitrogen inlet pipe, add 299 g of tetramethylbiphenol type epoxy resin (epoxy equivalent 187), 217 g of p-toluic acid and three trimethylbenzenes as a catalyst. 1 g of phenylphosphine was reacted at 115° C. for 24 hours to obtain the compound (B3) represented by the aforementioned general formula (1-1). The compound (B3) had an acid value of 0.2 and a hydroxyl value of 171.

[0110] Synthesis Example 4 [Comparison of Synthesis of Polyester Resin (b') for Comparison]

[0111] 341 g of ethylene glycol and 659 g of adipic acid were charged into a four-neck flask with an internal volume of 1 liter equipped with a thermometer, a stirrer, and a reflux condenser. Furthermore, with respect to the total amount of ethylene glycol and adipic acid, 30 ppm tetraisopropyl titanate was added, and the temperature was raised to 220° C. while sti...

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Abstract

The present invention provides a resin composition for optical materials, which contains (A) a polymer obtained using a (meth)acrylic acid or a (meth)acrylic acid alkyl ester and (B) a compound represented by general formula (1), for the purpose of providing: a resin composition that is small in birefringence change by an external force and is suitable for use in the production of an optical member; an optical film which is obtained using this resin composition; and a liquid crystal display device which uses this optical film. (In the formula, each of A1 and A2 independently represents an alkyl group having 1-8 carbon atoms or an aryl group having 6-18 carbon atoms; each of R1-R4 independently represents an alkyl group having 1-3 carbon atoms; and each of X1 and X2 independently represents a divalent linking group.)

Description

technical field [0001] The present invention relates to a resin composition that has little change in birefringence due to external force and can be suitably used for producing optical members, an optical film obtained using the resin composition, and a liquid crystal display device using the resin composition. Background technique [0002] Recently, for example, with the expansion of the display market, there has been an increase in the need to see images more clearly, and there is a need for optical materials that are not only transparent materials but also endowed with higher optical characteristics. [0003] In general, polymers have different refractive indices in the direction of the main chain of the molecule and in the direction perpendicular to it, resulting in birefringence. Strict control of this birefringence is required depending on the application. In the case of a protective film used for a polarizing plate of a liquid crystal, even if the total light transmit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30C08K5/06C08K5/101C08L33/00G02F1/1335
CPCC08K5/06C08K5/101G02B1/04G02F1/133528G02F2201/50C08L33/08C08L69/00
Inventor 田尻裕辅吉村洋志
Owner DIC CORP