Method for producing poly-p-benzene dicarboxylic acid trimethylene glycol ester

A technology of polytrimethylene terephthalate and terephthalic acid, which is applied in the field of preparation of polytrimethylene terephthalate, and can solve the problems of lower thermal stability of polyester melt, yellowing of color, and inability to obtain light-colored products, etc. problem, to achieve the effect of good thermal stability and good color tone
CN101130602AInactive Publication Date: 2008-02-27TORAY FIBER RES INST(CHINA) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TORAY FIBER RES INST(CHINA) CO LTD
Publication Date
2008-02-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparing method of polyytrimethylene terephthalate alcohol, which is characterized by the following: proceeding esterification reaction for terephthalic acid and 1, 3-methyl glycol; getting the product; proceeding polycondensation reaction; adopting structural formula (B) titanium compounds as accelerant in the polycondensation reaction; adopting phosphoric compound of structural formula (A) as stabilizer. This invention adds anti-oxidant and cobalt compounds to additional color, which polyester chip possesses better color cast and good heat endurance.
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Description

Technical field:

[0001] The invention relates to a production method of polytrimethylene terephthalate. Background technique:

[0002] Polyester, especially polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate, because of their excellent mechanical, physical, and chemical properties, are widely used in fibers, films, and other molds. Widely used in plastic products. Currently, since 1,3-propanediol is available cheaply and on a large scale, poly(trimethylene terephthalate) will be a promising plastic in the future. It has a long-chain molecular structure and most of its properties are between those of terephthalate Between ethylene formate and polybutylene terephthalate. Suitable applications include the entire field of fibers and moldings. However, with the expansion of its use and demand, the requirements for the characteristics of polyester in various fields have become more stringent, so there are still many problems to be solved....

Claims

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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