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Polyester composition, and preparation method and applications thereof

A composition and polyester technology, applied in the field of polyester composition, can solve the problems of reducing polyester gel rate, low gel rate, thermal cracking, etc., and achieve easy operation, simple manufacturing process and low gel rate. Effect

Inactive Publication Date: 2017-01-04
TORAY FIBER RES INST(CHINA) CO LTD
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  • Abstract
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Problems solved by technology

For example, Japanese Patent Laid-Open 2005-314643 and Japanese Patent Laid-Open 2006-225621 describe that gelation can be suppressed to some extent by adding a titanium compound in the oligomerization process such as transesterification, but the heat resistance of polyester itself Decrease, thermal cracking will occur during long-term film production and cannot fully inhibit the generation of gel
Also disclosed in Chinese patent CN98108099.5 is another method that can reduce the gel rate of polyester, that is, adding a copolyester with intermediary groups in the main chain to the polyester, and making the two form phase separation , and then by controlling the dispersed domain shape of the aforementioned copolyester, a polyester with a lower gel rate can be obtained, but the process conditions of this method are relatively complicated, and the stability of gel inhibition is not high

Method used

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  • Polyester composition, and preparation method and applications thereof

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preparation example Construction

[0024] The invention also discloses a preparation method of a polyester composition. Firstly, an oligomer is obtained through esterification or transesterification of an aromatic dibasic acid or its esterified product and an aliphatic dihydric alcohol, and then the oligomer is subjected to The polyester composition is prepared by polycondensation; in the preparation process of the polyester composition, a magnesium compound or a manganese compound that is 12 to 210 ppm relative to the total amount of the polyester composition is added in terms of magnesium or manganese; In terms of phosphorus element, the total amount of the polyester composition is 550-1650ppm of the pentavalent phosphoric acid ester shown in Formula 1.

[0025] The amount of the above-mentioned pentavalent phosphoric acid ester shown in Formula 1 is preferably 775-1100 ppm equivalent to the total amount of the polyester composition in terms of phosphorus element.

[0026] The aromatic dibasic acid or its est...

Embodiment 1

[0066] At 250°C, 166 parts by weight of terephthalic acid (TPA) and 72 parts by weight of ethylene glycol (EG) (that is, the molar ratio of EG to TPA is 1.15:1) were subjected to esterification reaction, through the by-product water Production capacity, when the esterification reaction rate reaches over 97%, transfer the obtained new diethylene terephthalate (BHT) oligomers to the polymerization tank. Add stabilizer trimethyl phosphate (TMPA) equivalent to 45ppm of the total amount of the polyester composition in terms of phosphorus to the polymerization kettle in sequence, and add a regulator equivalent to 7ppm of the total amount of the polyester composition in terms of lithium elements after 5 minutes Lithium acetate (LAH), pentavalent phosphate ester (formula A) equivalent to 550ppm of the total amount of the polyester composition in terms of phosphorus, and magnesium acetate equivalent to 12ppm of the total amount of the polyester composition in terms of magnesium, after 2...

Embodiment 2

[0069] In the polycondensation stage, pentavalent phosphate (formula A) corresponding to 1650 ppm of the total amount of the polyester composition in terms of phosphorus and manganese acetate equivalent to 210 ppm of the total amount of the polyester composition in terms of manganese are added. Other steps are with embodiment 1.

[0070] During the film-making process, the polymer is bonded to the cold drum without peeling off, and the film-forming property is good.

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Abstract

The invention discloses a polyester composition, and a preparation method thereof. The polyester composition is mainly prepared via reaction of an aromatic dibasic acid or an esterification product of the aromatic dibasic acid with an aliphatic dihydric alcohol; contains 500 to 1500ppm of a pentavalent phosphate based on the amount of phosphorus element in the amount of the polyester composition, and 10 to 200ppm magnesium element or manganese element based on the total amount of the polyester composition. Gelation rate of the polyester composition after thermal treatment at 300 DEG C in a nitrogen oxygen gas mixture with oxygen concentration of 1% is lower than 5wt%. The polyester composition can be applied to the field of thin films.

Description

technical field [0001] The invention relates to a polyester composition with low gel ratio, a preparation method and application of the polyester composition. Background technique [0002] Polyesters, especially polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, etc., are widely used due to their excellent mechanical, physical and chemical properties Production of fibers, films and other molded products. However, most polyesters will undergo thermal oxygen degradation and thermal decomposition under high temperature conditions. In the thermal oxygen degradation reaction, oxygen radicals attack the hydrogen on the benzene ring of polyester to generate peroxide functional groups, which are unstable. It will also decompose to generate free radicals, and the generated free radicals serve as bridging points and the products of polyester thermal decomposition to form bridging structures, that is, cross-linking reactions occur to form infusible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/181C08G63/183C08G63/86C08K5/523C08K5/521C08K5/098C08L67/02
Inventor 单伯军祁华望月克彦
Owner TORAY FIBER RES INST(CHINA) CO LTD
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