A kind of anti-aging polyester film and preparation method thereof

A polyester film and anti-aging technology, which is applied in the field of polyester film, can solve the problems of poor anti-aging performance of polyester film, and achieve the effect of excellent weather aging resistance and improved aging resistance

Active Publication Date: 2022-05-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of poor aging resistance of polyester films in the prior art, to provide an aging-resistant polyester film and its preparation method

Method used

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  • A kind of anti-aging polyester film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of preparation method of aging-resistant polyester film, concrete steps are as follows:

[0047] (1) preparation of modified polyester;

[0048] (1.1) Esterification reaction;

[0049] Make a slurry of terephthalic acid, ethylene glycol and imidazole-4,5-dicarboxylic acid with a molar ratio of 1:1.3:0.03, add zinc chloride and catalyst (antimony trioxide) and mix evenly. The amount of catalyst added The added amount of terephthalic acid is 0.02wt%; the added amount of zinc chloride is 20mol% of imidazole-4,5-dicarboxylic acid; the esterification reaction is carried out under pressure in a nitrogen atmosphere, and the pressurized pressure is 0.1MPa. The temperature of the reaction is 253°C, and the termination condition of the esterification reaction is: the distilled amount of water in the esterification reaction reaches 94% of the theoretical value;

[0050] (1.2) polycondensation reaction;

[0051]After the esterification reaction is over, start the polycond...

Embodiment 2

[0063] A kind of preparation method of aging-resistant polyester film, concrete steps are as follows:

[0064] (1) preparation of modified polyester;

[0065] (1.1) Esterification reaction;

[0066] Make a slurry of terephthalic acid, ethylene glycol and imidazole-4,5-dicarboxylic acid with a molar ratio of 1:1.3:0.04, add zinc chloride and catalyst (antimony trioxide) and mix evenly. The amount of catalyst added The added amount of terephthalic acid is 0.02wt%; the added amount of zinc chloride is 24mol% of imidazole-4,5-dicarboxylic acid; the esterification reaction is carried out under pressure in a nitrogen atmosphere, and the pressurized pressure is 0.25MPa. The temperature of the reaction is 255°C, and the termination condition of the esterification reaction is: the distilled amount of water in the esterification reaction reaches 96% of the theoretical value;

[0067] (1.2) polycondensation reaction;

[0068] After the esterification reaction is over, start the polyco...

Embodiment 3

[0080] A kind of preparation method of aging-resistant polyester film, concrete steps are as follows:

[0081] (1) preparation of modified polyester;

[0082] (1.1) Esterification reaction;

[0083] Make a slurry of terephthalic acid, ethylene glycol and imidazole-4,5-dicarboxylic acid with a molar ratio of 1:1.3:0.05, add zinc chloride and catalyst (antimony trioxide) and mix evenly. The amount of catalyst added The added amount of terephthalic acid is 0.02wt%; the added amount of zinc chloride is 23mol% of imidazole-4,5-dicarboxylic acid; the esterification reaction is carried out under pressure in a nitrogen atmosphere, and the pressurized pressure is 0.3MPa. The temperature of the reaction is 250°C, and the termination condition of the esterification reaction is: the distilled amount of water in the esterification reaction reaches 90% of the theoretical value;

[0084] (1.2) polycondensation reaction;

[0085] After the esterification reaction is over, start the polycon...

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Abstract

The invention relates to an aging-resistant polyester film and a preparation method thereof. The aging-resistant polyester film is obtained by modifying polyester according to a film-making process; the preparation method of the modified polyester is as follows: terephthalic acid, ethylene glycol , imidazole-4,5-dicarboxylic acid and zinc chloride are mixed uniformly and then carried out esterification reaction and polycondensation reaction to obtain modified polyester; the polyester segment of the aging-resistant polyester film includes terephthalic acid segment , ethylene glycol segment and imidazole-4,5-dicarboxylic acid segment, and the imidazole-4,5-dicarboxylic acid segments of different polyester segments are connected by Zn 2+ Coordination; the molar ratio of the terephthalic acid segment and the imidazole-4,5-dicarboxylic acid segment is 1:0.05-0.07; the imidazole-4,5-dicarboxylic acid segment participates in the coordination with two carbonyl groups O atom and N atom on imidazole. The present invention adopts Zn 2+ It forms a coordination bond with imidazole-4,5-dicarboxylic acid, which effectively improves the aging resistance of the polyester film. After aging for 500 hours, the retention rate of tensile strength is over 96.5%, and the retention rate of elongation at break is 94.4%. above.

Description

technical field [0001] The invention belongs to the technical field of polyester films, and relates to an aging-resistant polyester film and a preparation method thereof. Background technique [0002] Polyester film is an important product of polyester in the non-fiber field. At present, they mainly refer to the film form made of polyethylene terephthalate polymer in the polyester family. After biaxial stretching A high-grade plastic film with excellent performance is produced, which has high tensile strength, good stiffness, anti-burning, not easy to break, excellent electrical and optical properties, good oxygen resistance, moisture resistance, and cold resistance (-70°C) And heat resistance (200 ℃), and has excellent characteristics such as chemical corrosion resistance and shrinkage stability. Polyester film is mainly used in electrical, insulation, packaging, magnet containers, films, etc., and its application range is very wide. In my country, polyester films are mos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C08G63/78C08L67/02C08J5/18
CPCC08G63/6854C08G63/78C08J5/18C08J2367/02
Inventor 范红卫王丽丽王小雨魏存宏陈瑞张元华
Owner JIANGSU HENGLI CHEM FIBER
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