Resin composition, optical compensation film using same, and manufacturing method thereof

A technology of resin composition and optical compensation film, which is applied in optics, optical components, nonlinear optics, etc., and can solve the problems that retardation plates cannot meet Re and Nz

Active Publication Date: 2017-11-10
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this document discloses a norbornene-based polymer as a polymer having positive intrinsic birefringence, a copolymer of styrene and maleic anhydride as a polymer having negative intrinsic birefringence, and a combination of these A composition obtained by mixing polymers, but the retardation plate using this composition does not satisfy the expected relationship between Re and Nz as the retardation characteristics of the retardation film

Method used

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  • Resin composition, optical compensation film using same, and manufacturing method thereof
  • Resin composition, optical compensation film using same, and manufacturing method thereof
  • Resin composition, optical compensation film using same, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0118] Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

[0119] In addition, various physical properties shown in Examples were measured by the following methods.

[0120]

[0121] The structural analysis of the polymer was carried out by proton nuclear magnetic resonance emission ( 1 H-NMR) spectrum analysis.

[0122]

[0123] A gel permeation chromatography (GPC) apparatus (manufactured by Tosoh, trade name: C0-8011 (column GMH) was used. HR -H)), measured at 40°C using tetrahydrofuran or dimethylformamide as a solvent, and obtained as standard polystyrene conversion.

[0124]

[0125] Regarding the measurement of the light transmittance and haze of the produced film, the light transmittance was measured according to JIS K7361-1 (1997 edition), and the haze was measured using a haze meter (manufactured by Nippon Denshoku Industries, trade name: NDH2000) according to JIS-K713...

Synthetic example 1

[0130] Synthesis Example 1 (Synthesis of Diethyl Fumarate Polymer)

[0131] 50 g of diethyl fumarate and 0.45 g of t-butyl peroxypivalate as a polymerization initiator were placed in a glass ampoule with a capacity of 75 mL, nitrogen substitution and pressure relief were repeated, and then the mixture was sealed under reduced pressure. The ampoule was placed in a thermostat at 50°C, and radical polymerization was carried out by holding it for 72 hours. After the completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 200 g of tetrahydrofuran. This polymer solution was dripped in 4 L of hexane and precipitated, and then vacuum-dried at 80° C. for 10 hours to obtain 26 g of a diethyl fumarate polymer. The number average molecular weight of the obtained polymer was 25,000.

Synthetic example 2

[0132] Synthesis Example 2 (Synthesis of Diethyl Fumarate / Monoethyl Fumarate Copolymer)

[0133] 48 g of diethyl fumarate, 2.1 g of monoethyl fumarate, and 0.45 g of t-butyl peroxypivalate as a polymerization initiator were placed in a glass ampoule with a capacity of 75 mL, and nitrogen substitution and pressure relief were repeated. , melted under reduced pressure. The ampoule was placed in a thermostat at 50°C, and radical polymerization was carried out by holding it for 72 hours. After the completion of the polymerization reaction, the polymer was taken out from the ampoule and dissolved in 200 g of tetrahydrofuran. 22 g of diethyl fumarate / monoethyl fumarate copolymers were obtained by dripping this polymer solution in 4 L of hexane and making it precipitate, and vacuum-dried at 80 degreeC for 10 hours. The obtained polymer had a number average molecular weight of 23,000, 95 mol % of diethyl fumarate residue units, and 5 mol % of monoethyl fumarate residue units.

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Abstract

The present invention relates to a resin composition, an optical compensation film using the resin composition, and a method for producing an optical compensation film. The resin composition is characterized in that it contains a cellulose-based resin represented by the following general formula (1): 30 to 99% by weight and 70 to 1% by weight of a fumarate polymer containing 30 mol% or more of fumaric acid diester residue units represented by the following general formula (2) . (In the formula, R1 to R3 each independently represent a substituent having 1 to 12 carbon atoms, and R4 and R5 represent an alkyl group having 1 to 12 carbon atoms.)

Description

technical field [0001] The present invention relates to a resin composition, an optical compensation film using the same, and a method for producing the same, and more particularly, to a resin composition, an optical compensation film for liquid crystal displays having excellent retardation characteristics and wavelength dispersion characteristics, and production thereof method. Background technique [0002] As the most important display device in the multimedia society, liquid crystal displays are widely used in mobile phones, computer monitors, notebook personal computers, and televisions. In order to improve display characteristics, many optical films are used in liquid crystal displays. In particular, the optical compensation film plays a large role in improving the contrast, compensation tone, etc. when viewed from the front or obliquely. [0003] Liquid crystal displays include vertical alignment type (VA-LCD), in-plane alignment liquid crystal (IPS-LCD), super twist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/26C08J5/18C08L31/06G02B5/30G02F1/13363C08J7/048
CPCC08J5/18C08L1/26C08J2301/26C08J2331/06C08J2367/02C08J2401/26C08J2431/06G02B5/3083C08L35/00C08J7/0427C08J7/048C08L35/02C08J2301/28C08J2435/02C09D101/28C08L1/28
Inventor 伊藤正泰豊增信之北川贵裕
Owner TOSOH CORP
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