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Fumaric acid diester-cinnamic acid ester copolymer, method for producing same, and film using same

A technology of fumaric acid diester and cinnamic acid esters, which is applied in the direction of coating, etc., can solve the problems of low heat resistance, small phase difference, and insufficient properties of the phase difference film, and achieve the effect of excellent characteristics and high-efficiency manufacturing

Active Publication Date: 2016-08-31
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Moreover, there are acrylic resins and polystyrene as polymers having negative birefringence, but acrylic resins have a small retardation and have insufficient properties as a retardation film.
Polystyrene has the following problems: due to the large photoelastic coefficient in the low-temperature region, there are problems in the stability of the phase difference such as a slight stress even if the phase difference changes; in terms of optical characteristics such as the large wavelength dependence of the phase difference problems; and practical problems such as low heat resistance, so it cannot be used in reality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1 (production of diisopropyl fumarate-ethyl cinnamate copolymer)

[0056] Put 50 g (0.25 mol (95.02 mol%)) of diisopropyl fumarate and 2.3 g (0.013 mol (4.94 mol%)) of ethyl cinnamate into a glass ampoule with a capacity of 75 mL. Monomer divinylbenzene 0.014g (1.1×10 -4 mol (0.04 mol %)) and 0.29 g (0.0016 mol (0.61 mol %)) of tert-butyl peroxypivalate as a polymerization initiator, after performing nitrogen substitution and depressurization, they were sealed under reduced pressure. Radical polymerization was performed by placing this ampoule in a thermostat at 50° C. and maintaining it for 144 hours. After the polymerization reaction was completed, the polymer was taken out from the ampoule and dissolved in 400 g of tetrahydrofuran. After dropping this polymer solution into 3 L of methanol to precipitate it, vacuum-dry it at 80° C. for 10 hours to obtain 28.8 g of diisopropyl fumarate-ethyl cinnamate copolymer (yield: 55%).

[0057] The number average molecu...

Embodiment 2

[0059] Example 2 (production of diisopropyl fumarate-ethyl cinnamate copolymer)

[0060] Put 50 g (0.25 mol (85.24 mol%)) of diisopropyl fumarate and 7.6 g (0.043 mol (14.66 mol%)) of ethyl cinnamate into a glass ampoule with a capacity of 75 mL. Monomer divinylbenzene 0.038g (2.9×10 -4 mol (0.10 mol%)) and 0.32 g (0.0018 mol (0.61 mol%)) of tert-butyl peroxypivalate as a polymerization initiator were repeatedly subjected to nitrogen substitution and decompression, and then sealed under reduced pressure. Radical polymerization was performed by placing this ampoule in a thermostat at 50° C. and maintaining it for 144 hours. After the polymerization reaction was completed, the polymer was taken out from the ampoule and dissolved in 400 g of tetrahydrofuran. After dropping this polymer solution into 3 L of methanol to precipitate it, vacuum-dry it at 80° C. for 10 hours to obtain 32.3 g of diisopropyl fumarate-ethyl cinnamate copolymer (yield: 57%).

[0061] The number averag...

Embodiment 3

[0063] Example 3 (production of diisopropyl fumarate-ethyl cinnamate copolymer)

[0064] 50 g (0.25 mol (69.99 mol %)) of diisopropyl fumarate, 18.9 g (0.107 mol (29.96 mol %)) of ethyl cinnamate, as radical polymerizable polyfunctional 0.064g (1.8×10 -4 mol (0.05 mol %)) and 0.39 g (0.0023 mol (0.64 mol %)) of tert-butyl peroxypivalate as a polymerization initiator were repeatedly subjected to nitrogen substitution and decompression, and then sealed under reduced pressure. Radical polymerization was performed by placing this ampoule in a thermostat at 50° C. and maintaining it for 168 hours. After the polymerization reaction was completed, the polymer was taken out from the ampoule and dissolved in 400 g of tetrahydrofuran. The polymer solution was dropped into 3 L of methanol to precipitate it, and then vacuum-dried at 80° C. for 10 hours to obtain 35.2 g of diisopropyl fumarate-ethyl cinnamate copolymer (yield: 51%).

[0065] The number average molecular weight of the o...

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PUM

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Abstract

The present invention provides a new high-molecular-weight fumaric acid diester-cinnamate copolymer that can be expected to maintain excellent strength or have excellent toughness when it is formed into a film, a method for efficiently producing it, and a method using its membrane. Fumaric acid diester-cinnamic acid ester copolymer containing fumaric acid diester residue units, cinnamate residue units having an alkyl group having 1 to 6 carbon atoms, and having two or more radically polymerizable functional groups residue units of multifunctional monomers.

Description

technical field [0001] The present invention relates to a new fumaric acid diester-cinnamic acid ester copolymer, its production method, and a film using the fumaric acid diester-cinnamic acid ester copolymer. More specifically, it relates to a Novel high-molecular-weight fumaric acid diester-cinnamic acid ester copolymer usable in films and the like, a method for efficiently producing the same, and a film using the fumaric acid diester-cinnamic acid ester copolymer. Background technique [0002] Currently, liquid crystal displays are widely used in mobile phones, computer monitors, notebook computers, and televisions as the most important display devices in the multimedia society. In order to improve the display characteristics of the liquid crystal display, a large number of optical films can be used, especially the retardation film, which can improve the contrast and compensate the color tone when viewed from the front and obliquely. As a conventional retardation film, p...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F220/10C08F290/06C08J5/18
CPCC08F222/14C09D133/14C08J2333/04C08F265/04C08J5/18C08J2333/06C08J2333/08C08F220/1802C08F212/36C08F222/1065C08F222/102C08F220/12
Inventor 北川贵裕土井亨藤井靖芳坂口孝太乾章朗伊藤正泰
Owner TOSOH CORP
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