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Polyester and production method thereof

A technology of polyester and compound, applied in the field of polyester and its production, can solve the problems of prolonged polymerization reaction time, yellowing of polymer, decrease in heat resistance, etc., to reduce foreign matter content, solve yellowing of color tone, and avoid environmental problems Effect

Inactive Publication Date: 2010-11-17
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, when a titanium compound is used as a catalyst, due to its high activity, side reactions are also promoted, resulting in problems such as poor thermal stability of the obtained polymer, or yellowing and coloring of the polymer.
[0005] In the process of producing polyester, the combination of catalyst titanium compound and phosphorus compound can indeed improve the stability of the melt-heated polyester to a certain extent, but if the phosphorus compound is added above a certain amount, it will excessively inhibit the stability of the titanium compound. Polymerization activity, the target degree of polymerization cannot be achieved, or the polymerization reaction time is significantly prolonged, resulting in unsatisfactory color tone of the obtained polyester
[0006] As mentioned in the patent CN 1412218, adding a toner cobalt compound, although the obtained polyester color tone is relatively good, but the heat resistance is reduced, and the use of heavy metals also has an impact on the environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Polyester and production method thereof
  • Polyester and production method thereof
  • Polyester and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of polyester, which is prepared from the reactants of conventional polyester production in the presence of a catalyst.

[0029] Wherein the transesterification catalyst is calcium acetate.

[0030] The catalyst titanium compound used for the polycondensation reaction is:

[0031]

[0032] The phosphorus-containing compound stabilizer (PW9225) contains compound (AT626) and tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (AT10), and the mass ratio is 1:1 . Among them, the mechanism of AT626 is:

[0033]

[0034] The chemical structural formula of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester is:

[0035]

[0036] The preparation process is as follows: at a temperature of 235°C, add 0.096 parts (weight) of catalyst calcium acetate (the content of calcium element is 113ppm), make 194 parts (weight) of dimethyl terephthalate and 121 parts (weight) of ethyl Glycol is subjected to transes...

Embodiment 2

[0038] The consumption of catalyst is:

[0039] The content of calcium atoms in the calcium compound is 113ppm

[0040] The content of phosphorus atoms in phosphorus compounds is 10ppm

[0041] The content of titanium atoms in the titanium compound is 3ppm

[0042] Cyan 45 dye 1.4ppm

[0043] All the other are with embodiment 1.

Embodiment 3

[0045] The consumption of catalyst is:

[0046] The content of calcium atoms in the calcium compound is 68ppm

[0047] The content of phosphorus atoms in phosphorus compounds is 10ppm

[0048] The content of titanium atoms in the titanium compound is 3ppm

[0049] Cyan 104 dye 1.4ppm

[0050] All the other are with embodiment 1.

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Abstract

The invention discloses polyester and a production method thereof. The polyester at least comprises a compound A from calcium compounds, at least comprises a compound B from phosphorous compounds, and at least comprises a compound C from antimony and titanium compounds. In the polyester, the calcium compounds and the phosphorous compounds are combined for use so that a side reaction is inhibited; and therefore, the obtained polyester has good tone and high heat stability.

Description

Technical field: [0001] The present invention relates to a kind of polyester and its production method. Background technique: [0002] Polyesters, especially polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate, are widely used in fibers, films and other molds due to their excellent mechanical, physical and chemical properties. Widely used in plastic products. [0003] At present, many catalysts used in industrial production and research are mainly three series of compounds: Sb, Ge, and Ti. At present, about 90% of the production uses antimony catalysts. Although the catalytic effect of antimony-based catalysts is very good, when antimony compounds are used as polymerization catalysts, when the polyester obtained is melt-spun continuously for a long period of time, the obtained polyester has defects, and foreign impurities adhere and accumulate on the melt-spun surface. The nozzle, and causes the polymer melt extruded through the nozzl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08K5/098C08K3/22C08K3/24C08K3/30C08K5/527C08K5/103C08G63/87C08G63/85C08G63/86C08G63/83C08G63/183
Inventor 成娟杨娟青山雅俊
Owner TORAY FIBER RES INST(CHINA) CO LTD