Polyester composition and application thereof

A technology of composition and polyester, which is applied in the field of polyester composition for hot-pressed films, can solve the problems of high turbidity of products, poor dispersion of nanoparticles, and little contribution to crystallization performance, etc., and achieve good color tone and excellent crystallization performance , good low haze effect

Inactive Publication Date: 2010-06-30
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 application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 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.

[0056] The polyester is a PET-PEN copolymer obtained by transesterifying dimethyl terephthalate and dimethyl naphthalate with ethylene glycol.

[0057] The acetate catalyst used is magnesium acetate, lithium acetate. The antimony compound catalyst is antimony trioxide.

[0058] The nucleating agent is specifically nano-SiO 2 .

[0059] Concrete reaction process is as follows:

[0060] At a temperature of 160°C, 937.9 parts (weight) of dimethyl terephthalate (BASF) and 62.1 parts (weight) of dimethyl naphthalate (Japan Mitsubishi Gas Corporation) were mixed with 631 parts (weight) of ethyl Glycol (Yangzi Petrochemical, China) was transe...

Embodiment 2

[0063] At a temperature of 160° C., 862 parts (weight) of dimethyl terephthalate and 148 parts (weight) of dimethyl naphthalene dicarboxylate in 626 parts (weight) of ethylene glycol were subjected to an EI reaction, which was placed in the formulation Add 600ppm of magnesium acetate and 50ppm of lithium acetate as transesterification catalysts to a polymerization flask with a rectification tower, and react under normal pressure. When the temperature in the flask is 235°C and the temperature at the top of the rectification tower drops to 50°C, The above reaction is completed to obtain a small molecular polymer.

[0064] Add phosphorus stabilizer TEPA, the addition amount relative to final polyester weight is 500ppm, after 5 minutes, add nucleating agent sodium acetate NaAc (Jiangsu Jincheng Reagent Co., Ltd.), 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 compound addition a...

Embodiment 3

[0066] At a temperature of 160°C, 835.9 parts (weight) of dimethyl terephthalate and 164.1 parts (weight) of dimethyl naphthalene dicarboxylate were subjected to EI reaction in 617.7 parts (weight) of ethylene glycol, and added as a transesterification catalyst Magnesium acetate (600ppm relative to the weight of the final polyester) and lithium acetate (50ppm relative to the weight of the final polyester) were reacted under normal pressure. When the temperature in the flask was 235°C, rectification When the temperature at the top of the tower drops to 50° C., the above reaction is completed, and a polymer with small molecules is obtained.

[0067] Add phosphorus stabilizer TEPA, the addition amount relative to final polyester weight is 500ppm, after 5 minutes, add Al 2 o 3 (Degussa, Germany) and the composite nucleating agent of NaAc, Al 2 o 3 The particle size is 20 nm, the added amount is 2 parts by weight, and the added amount of NaAc is 2 parts by weight. The composite...

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Abstract

The invention discloses a polyester composition and an application thereof, comprising blends formed by poly(ethylene terephthalate) and poly(ethylene naphthalate) or copolymer formed by ethylene terephthalate units and ethylene naphthalate units; and nucleating agent which accounts for 5ppm-10wt% of the total weight of the polyester combination; in the blends formed by the poly(ethylene terephthalate) and the poly (ethylene naphthalate), the poly(ethylene terephthalate) accounts for 80-99.9mol%, and the poly(ethylene naphthalate) accounts for 0.1-20mol%; in the copolymer formed by the ethylene terephthalate units and the ethylene naphthalate units, the ethylene terephthalate units account for 80-99.9mol%, and the ethylene naphthalate units account for 0.1-20mol%. The composition has good crystallization property, good color tone and low haze. The polyester composition can be used for preparing hot-pressed polymer films.

Description

technical field [0001] The invention relates to a polyester composition for hot-pressing 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 (films, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K5/098C08K3/22C08K3/34C08K3/36
Inventor 朱丛静祁华青山雅俊
Owner TORAY FIBER RES INST(CHINA) CO LTD
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