Polyester film and application thereof

A polyester film and polyester technology, applied in the field of polyester film, can solve the problems of poor water resistance, affect polyester characteristics, and easily become brittle materials, and achieve improved refractive index performance, high heat resistance, and high refraction. rate effect

Inactive Publication Date: 2013-06-05
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When phosphorus atoms are introduced into the molecular structure, if the amount of phosphorus atoms introduced is small, the refractive index will not be improved, and if the amount of phosphorus atoms introduced is large, the material will become brittle, and the transparency will be poor due to whitening, and the water resistance will be reduced due to the increase in water absorption Difference
[0006] In Chinese published patent CN101955576A, the refractive index of polyester film can be improved by adding biphenyl compound, but the added amount is relatively large, which will affect other properties of polyester

Method used

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  • Polyester film and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The polyester composition is a copolymer obtained by the esterification reaction of terephthalic acid, ethylene glycol and 4,4'-dicarboxydiphenyl sulfone.

[0036] Concrete reaction process is as follows:

[0037] At a temperature of 250°C, 166 parts (weight) of terephthalic acid and 64.2 parts (weight) of ethylene glycol and 28.8 parts (weight) of 4,4'-dihydroxydiphenyl sulfone (Haining Huangshan Chemical Co., Ltd.) Direct esterification reaction, the above reaction is completed, and a small molecule polymer is obtained.

[0038] Add catalyst antimony trioxide compound Sb to the above-mentioned small molecule polymer 2 o 3 The addition amount of Sb in the middle is 200ppm, the addition amount of magnesium acetate is 55ppm (relative to the weight of polyester), and the phosphorus stabilizer triethylphosphonoacetate TEPA70ppm (relative to the weight of polyester). Under atmospheric pressure, the pressure is reduced to about 300Pa in 1 hour, and the temperature is rais...

Embodiment 2

[0041] 166 parts by weight of terephthalic acid, 60.6 parts by weight of ethylene glycol and 43.2 parts by weight of 4,4'-dihydroxydiphenylsulfone (Haining Huangshan Chemical Co., Ltd.) were subjected to direct esterification. All the other are the same as embodiment 1.

Embodiment 3

[0043] 166 parts by weight of terephthalic acid, 57.1 parts by weight of ethylene glycol and 57.5 parts by weight of 4,4'-dihydroxydiphenyl sulfone (Haining Huangshan Chemical Co., Ltd.) were subjected to direct esterification. All the other are the same as embodiment 1.

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Abstract

The invention discloses a polyester film. The polyester film is mainly formed by a polyester composite composed of two kinds of structural units. The refractive index of the polyester film after being stretched in two directions is 1.7 to 1.85. The polyester film is high in refractive index and heat resistance and is suitable for the preparation of high reflection films.

Description

technical field [0001] The invention relates to a polyester film, especially a polyester film with high heat resistance and high refractive index. Background technique [0002] In recent years, the demand for plastic materials for optics has been increasing, and the research on optical products such as panels for liquid crystal displays, protective films for color filters, and films for solar cells is very popular. Due to the characteristics of plastic materials such as easy molding and processing, and light weight, it has a wide range of uses. [0003] Optical films generally require properties such as high refractive index, low specific gravity, formability, heat resistance, light resistance, and impact resistance according to their different uses. In recent years, the requirements for these properties have been increased, and various monomers, oligomers, and polymers for optical applications have been extensively studied. [0004] Polyester films, especially polyethylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L67/02C08G63/688G02B1/04
Inventor 祁华卢群英望月克彦
Owner TORAY FIBER RES INST(CHINA) CO LTD
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