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Resin composition, optical compensation film employing same, and production method for same

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: 2016-01-20
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 employing same, and production method for same
  • Resin composition, optical compensation film employing same, and production method for same
  • Resin composition, optical compensation film employing same, and production method for same

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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 the 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) spectral analysis obtained.

[0122]

[0123] Use a gel permeation chromatography (GPC) device (manufactured by Tosoh, trade name: C0-8011 (installed column GMH HR -H)) was measured at 40° C. using tetrahydrofuran or dimethylformamide as a solvent, and calculated in terms of standard polystyrene.

[0124]

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

Synthetic example 1

[0130] Synthesis example 1 (synthesis of diethyl fumarate polymer)

[0131] 50 g of diethyl fumarate and 0.45 g of tert-butyl peroxypivalate as a polymerization initiator were placed in a glass ampoule with a capacity of 75 mL, and after nitrogen substitution and pressure release were repeated, the mixture was sealed under reduced pressure. This ampoule was placed in a thermostat at 50° C., and held for 72 hours to perform radical polymerization. After the polymerization reaction was completed, the polymer was taken out from the ampoule and dissolved in 200 g of tetrahydrofuran. This polymer solution was dropped into 4 L of hexane to precipitate, 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] Put 48 g of diethyl fumarate, 2.1 g of monoethyl fumarate, and 0.45 g of tert-butyl peroxypivalate as a polymerization initiator in a glass ampoule with a capacity of 75 mL, and repeat nitrogen substitution and pressure release. , Fusion-sealed under reduced pressure. This ampoule was placed in a thermostat at 50° C., and held for 72 hours to perform radical polymerization. After the polymerization reaction was completed, the polymer was taken out from the ampoule and dissolved in 200 g of tetrahydrofuran. This polymer solution was dropped into 4 L of hexane to precipitate, and then vacuum-dried at 80° C. for 10 hours to obtain 22 g of a diethyl fumarate / monoethyl fumarate copolymer. 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

Provided are a resin composition characterized by containing 30-99 mass% of a cellulose resin represented by general formula (1) below, and 70-1 mass% of a fumaric acid ester polymer containing 30 mol% or more of fumaric acid residue units represented by general formula (2) below; an optical compensation film employing the same; and a production method for an optical compensation film. (1) (2) (In the formulas, R1-R3 represent C1-12 substituent groups, and R4 and R5 represent C1-12 alkyl groups.)

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. More specifically, it relates to a resin composition, an optical compensation film for liquid crystal displays excellent in 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] There are many types of liquid crystal displays such as vertical alignment type (VA-LCD), in-plane alignment type liqui...

Claims

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Application Information

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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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