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Polyester composition and use thereof

A composition and polyester technology, applied in the field of polyester compositions for low-haze hot-pressed films, can solve the problems of high turbidity of products, poor nano-particle dispersion, and little contribution to crystalline properties, and achieve good color tone, Excellent crystallinity, Tcc reduction effect

Inactive Publication Date: 2010-11-03
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a small amount of nano-scale inorganic particles needs to be added, which has little contribution to the crystallization properties, and a large amount of nanoparticles also has problems such as poor dispersion and high turbidity of the product.

Method used

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  • Polyester composition and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Acetate is added as a catalyst during the transesterification process, a phosphorus stabilizer and a nucleating agent are added after the transesterification reaction (EI reaction), and an antimony compound is added as a catalyst during the polycondensation process to obtain a polyester composition through polycondensation reaction.

[0061] Among them, polyester is a PET-PEN copolymer obtained by transesterifying dimethyl terephthalate (DMT) and dimethyl naphthalate (DMN) with ethylene glycol (EG).

[0062] The acetate catalyst used is magnesium acetate, lithium acetate. The antimony compound catalyst is antimony trioxide.

[0063] The nucleating agent is specifically anhydrous sodium acetate (NaAc).

[0064] Concrete reaction process is as follows:

[0065] Under the temperature of 150 ℃, make 937.9 parts (weight) DMT (BASF company) and 62.1 parts (weight) DMN (Japan Mitsubishi Gas Co., Ltd.) and 631 parts (weight) EG (China Yangzi Petrochemical) carry out transeste...

Embodiment 2

[0068] At a temperature of 150°C, 862 parts (weight) of DMT and 148 parts (weight) of DMN were subjected to EI reaction in 626 parts (weight) of EG, which were placed in a polymerization flask equipped with a rectification column, and added as transesterification Catalyst magnesium acetate 600ppm, lithium acetate 50ppm, react under normal pressure, when the temperature in the flask is 235 ℃, when the temperature of the rectifying tower top drops to 50 ℃, the above reaction is completed, and a small molecular polymer is obtained.

[0069] Add phosphorus stabilizer TEPA, the addition amount is 17ppm with respect to final polyester weight P, after 5 minutes, add nucleating agent NaAc, addition amount is 3 parts (weight). NaAc was dispersed in EG to form a 10wt% slurry, and then fed. with Sb as a polymerization catalyst 2 o 3 The amount of Sb added in the compound is 100ppm and mixed, added to the above-mentioned small molecule polymer, depressurized to about 300Pa under atmosph...

Embodiment 3

[0071] Under the temperature of 150 ℃, make 835.9 parts (weight) DMT and 164.1 parts (weight) DMN carry out EI reaction in 617.7 parts (weight) EG, add the magnesium acetate (relative to the addition amount of final polyester weight) as transesterification catalyst 600ppm), lithium acetate (50ppm relative to the weight of the final polyester), reacted under normal pressure, when the temperature in the flask was 235°C and the temperature at the top of the distillation tower dropped to 50°C, the above reaction was completed , to obtain small molecular polymers.

[0072]Add phosphorus stabilizer TEPA, the addition amount relative to the final polyester weight P is 30ppm, after 5 minutes, add sodium benzoate (Shanghai Weiping Chemical Co., Ltd.), the addition amount is 3.5 parts (weight). The nucleating agent was dispersed in EG under high speed stirring to form a 12% by weight slurry. with Sb as a polymerization catalyst 2 o 3 Compounds (176ppm of Sb relative to the weight of ...

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Abstract

The invention discloses a polyester composition and use thereof. The polyester composition comprises a copolymer consisting of an ethylene terephthalate unit and an ethylene naphthalate unit; the ethylene terephthalate unit content of the copolymer consisting of the ethylene terephthalate unit and the ethylene naphthalate unit is 80 to 99.9 mol percent, while ethylene naphthalate unit content is 0.1 to 20 mol percent; and the polyester composition at least contains a compound A which may be an antimony compound or a titanium compound, a compound B which may be a phosphorous compound, and a nucleating agent which is 5ppm to 10 weight percent of the total weight of the polyester composition. The composition has high crystallinity, high tone and low haze, and can be used for preparing a hot-pressed thin polymer film.

Description

technical field [0001] The invention relates to a polyester composition for a low-haze hot-pressed film and its application. Background technique [0002] Thermoplastic polyesters are widely used in various applications such as containers, films, and fibers due to their high dimensional stability, smooth surface, excellent heat resistance, and processability. [0003] Thermoplastic polyesters represented by polyethylene terephthalate (hereinafter sometimes abbreviated as "PET") are widely used in the electrical industry, such as insulator materials in motors and capacitors, but are affected by the working environment. Affected by long-term exposure to relatively high temperatures, it is easy to age and deform the material, affecting the performance and use of the product. [0004] Copolymerization modification of PET with naphthalene dicarboxylate monomers improves performance in many aspects such as glass transition temperature (Tg), and enables the final oriented products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/10C08J5/18
Inventor 朱丛静祁华青山雅俊
Owner TORAY FIBER RES INST(CHINA) CO LTD
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