Polyester and production method thereof

A technology of polyester and polycondensation reaction, which is applied in the field of hydrolysis-resistant polyester and its production, and can solve problems such as impact and unfavorable performance of polyester products

Inactive Publication Date: 2012-09-26
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, thermoplastic materials mixed with stabilizers may adversely affect other properties of polyester products

Method used

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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

[0047] A hydrolysis-resistant polyester synthesized by transesterification. A small molecular polymer is obtained by transesterification reaction of aromatic dicarboxylic acid ester, aliphatic dihydric alcohol and benzoic acid compound with three substituent groups on the benzene ring. In this process, inorganic antimony compound and organic acid manganese compound are added as Catalyst for the transesterification reaction; polycondensation reaction of the obtained small molecule polymer to obtain hydrolysis-resistant polyester, adding stabilizer phosphorus compound, inorganic phosphate, antioxidant, trisubstituted benzoic acid, potassium hydroxide respectively in the polycondensation reaction.

[0048] Polyester is polyethylene terephthalate obtained by transesterifying dimethyl terephthalate with ethylene glycol.

[0049] The antimony compound used is antimony trioxide, the manganese compound is manganese acetate, the stabilizer phosphorus compound is phosphoric acid, the in...

Embodiment 2

[0071] Relative to polyester weight, where,

[0072] Antimony element content in antimony trioxide: 250ppm;

[0073] Manganese element content in manganese acetate: 160ppm;

[0074] Addition of hindered phenol antioxidant Ir-300: 0.03wt%;

[0075] Phosphorus element content in phosphoric acid: 70ppm;

[0076] Phosphorus element content in sodium dihydrogen phosphate: 55ppm;

[0077] Potassium element content in potassium hydroxide: 30ppm;

[0078] Addition of trimellitic anhydride (TMA): 0.3 wt%.

[0079] The rest are the same as in Example 1, the COOH content of the polyester before hydrolysis treatment is 19.0eq / t, and its BB% after hydrolysis treatment is 0.39.

Embodiment 3

[0081] Relative to polyester weight, where,

[0082] Antimony element content in antimony trioxide: 250ppm;

[0083] Manganese element content in manganese acetate: 160ppm;

[0084] Addition of hindered phenol antioxidant Ir-300: 0.03wt%;

[0085] Phosphorus element content in phosphoric acid: 70ppm;

[0086] Phosphorus element content in sodium dihydrogen phosphate: 55ppm;

[0087] Potassium element content in potassium hydroxide: 30ppm;

[0088] Addition of trimellitic anhydride (TMA): 0.6 wt%.

[0089] The rest are the same as in Example 1, the COOH content of the polyester before hydrolysis treatment is 18.8eq / t, and its BB% after hydrolysis treatment is 0.37.

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Abstract

The invention discloses a hydrolysis-resistant polyester and a production method thereof. The hydrolysis-resistant polyester at least contains one compound A from inorganic antimony compounds, one compound B from organic acid manganic compounds, one compound C from stabilizer phosphorous compounds, one compound D from inorganic phosphates, one compound E from benzoic acid compounds containing tri-substituent group on the benzene ring, and one compound F from hindered phenol antioxidants and / or phosphate antioxidants. The polyester pellet disclosed by the invention has excellent hydrolysis resistance.

Description

Technical field: [0001] The invention relates to a hydrolysis-resistant polyester and a production method thereof. Background technique: [0002] Polyester itself has excellent characteristics, especially polyethylene terephthalate (PET), polytrimethylene terephthalate and polybutylene terephthalate, due to its excellent mechanical, physical and chemical properties, Such as good mechanical strength, heat resistance, chemical resistance, good transparency and other characteristics, it is widely used as fiber, film, resin and other molded products. However, most polyesters have poor hydrolysis resistance in high-temperature and humid environments, and polyesters are easily hydrolyzed by the catalysis of their residual terminal acid groups, resulting in deterioration of physical properties. [0003] Since the terminal group of polyester is sensitive to moisture, the industrial application of polyester is greatly limited. Therefore, in order to expand its application field, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/32C08K3/22C08K5/134C08K5/13C08K5/375C08K5/523C08K5/526C08G63/20C08G63/86C08G63/83
Inventor 卢群英祁华望月克彦
Owner TORAY FIBER RES INST(CHINA) CO LTD
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