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Mixed glycol modified copolyester and preparation method thereof

A technology of diol and copolyester, which is applied in the field of polyester materials and its preparation, can solve the problems of low intrinsic viscosity, insufficient transparency, and high acetaldehyde content, and achieve high transparency, slow crystallization speed, and reasonable design. Effect

Active Publication Date: 2020-09-25
浙江凯普奇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acetaldehyde content of the polyester products made by the above-disclosed prior art is relatively high, and the intrinsic viscosity is not high and not transparent enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A mixed glycol modified copolyester, its components include: 86 parts by weight of terephthalic acid PTA as a dibasic acid; mixed glycol with 32 parts by weight of ethylene glycol MEG and 1,2-propylene glycol PDO 2.3 Parts by weight; the catalyst is ethylene glycol antimony, whose antimony content accounts for 200 ppm of the weight of the dibasic acid; the stabilizer is phosphoric acid, whose phosphorus content accounts for 9 ppm of the weight of the dibasic acid; the red dye is 283 produced by Jiaros Asia Co., Ltd. -10068-2 PRT Global Red Dispersant-2, the addition amount is 0.25 ppm of the weight of the dibasic acid, and the blue dye uses the PRT Global Blue Dispersant Model 285-10135-2 produced by Jiaros Asia Co., Ltd. -2, the addition amount is 0.67 ppm of the weight of the dibasic acid.

[0029] The preparation method is:

[0030] (1) Continuous liquid phase polymerization process:

[0031] The first stage esterification reaction: the above-mentioned components are firs...

Embodiment 2

[0044] A mixed glycol modified copolyester, its components include: 86 parts by weight of terephthalic acid PTA as a dibasic acid; mixed glycol with 31 parts by weight of ethylene glycol MEG and 1,2-propylene glycol PDO 2.3 Diethylene glycol DEG 0.6 parts by weight; antimony trioxide is used as the catalyst, and its antimony content accounts for 300 ppm by weight of the dibasic acid; the stabilizer is phosphoric acid, and its phosphorus content accounts for 10 ppm by weight of the dibasic acid; the red dye is Jialuosi The PRT Global Red Dispersant-2 produced by Asia Co., Ltd. with the model number 283-10068-2, the addition amount is 0.5 ppm of the weight of the dibasic acid, and the blue dye is selected from the model number 285-10135 produced by Jiaros Asia Co., Ltd. 2 PRT Global Blue Dispersant-2, its addition amount is 1.5 ppm of the weight of the dibasic acid.

[0045] The preparation method of this embodiment is roughly the same as that of the first embodiment, the differenc...

Embodiment 3

[0059] A mixed glycol modified copolyester, its components include: 86 parts by weight of terephthalic acid PTA as a dibasic acid; mixed glycol with 29.4 parts by weight of ethylene glycol MEG and 1,2-propylene glycol PDO 4.1 parts by weight and 1.1 parts by weight of diethylene glycol DEG; the catalyst uses titanium glycol, whose titanium content accounts for 10 ppm of the weight of the dibasic acid; the stabilizer uses triethyl phosphate, whose phosphorus content accounts for 8 ppm of the weight of the dibasic acid; red The dye is selected from PRT Global Red Dispersant-2, model 283-10068-2 produced by Jiaros Asia Co., Ltd., and the addition amount is 0.5 ppm of the weight of the dibasic acid. The blue dye is selected from the model produced by Jiaros Asia Co., Ltd. 285-10135-2 PRT Global Blue Dispersant-2, its addition amount is 1.2ppm by weight of dibasic acid.

[0060] The preparation method of this embodiment is roughly the same as that of the first embodiment, with the dif...

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Abstract

The invention relates to mixed dihydric alcohol modified copolyester. The mixed dihydric alcohol modified copolyester is characterized by being prepared from the following components of dicarboxylic acid and mixed dihydric alcohol according to a molar ratio of 1:(1.04 to 2), wherein the dicarboxylic acid adopts terephthalic acid PTA; the mixed dihydric alcohol consists of ethylene glycol MEG, 1,2-propanediol PDO, and diethylene glycol DEG; 1,2-propanediol PDO accounts for 1 to 10mol% of total usage amount of mixed dihydric alcohol; the usage amount of diethylene glycol DEG is no more than 6mol% of total usage amount of mixed dihydric alcohol. The invention also relates to a preparation method of the mixed dihydric alcohol modified copolyester. Compared with the prior art, the mixed dihydric alcohol modified copolyester has the advantages that the preparation method is reasonable; the viscosity is high, the transparency is high, the content of acetaldehyde is low, and the fluidity of polymer is good.

Description

Technical field [0001] The invention belongs to the field of polyester materials and their preparation, and specifically relates to a mixed glycol modified copolyester and a preparation method. Background technique [0002] As a class of engineering plastics with excellent performance and wide application, polyester products have been widely used in chemical fiber, plastics, film and other industries. In the prior art, production is mostly carried out by transesterification polycondensation method, direct esterification polycondensation method, etc., such as the Chinese invention patent "A ethylene terephthalate 1,2-propylene glycol copolyester" with application number 200910087052.6 (Authorization announcement number is CN101921385B) discloses an ethylene terephthalate 1,2-propylene glycol copolyester, which uses 1,2-propylene glycol as the third monomer to add to terephthalic acid or terephthalic acid In the synthesis system of dimethyl ester and ethylene glycol, polyethylene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672C08G63/78
CPCC08G63/672C08G63/78
Inventor 郑兵邱增明章延举华云肖海军沈志刚
Owner 浙江凯普奇新材料科技有限公司
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