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PET copolymer containing non-planar ring and preparation method

A copolymer and non-planar technology, which is applied in the field of non-planar ring-containing PET copolymers and its preparation, can solve the problems of insufficient performance of PET materials, etc.

Inactive Publication Date: 2018-12-07
JIANGSU GUANGHUI PACKAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of this invention is to provide a PET copolymer containing non-planar rings, to solve the problem of insufficient performance of existing PET materials

Method used

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  • PET copolymer containing non-planar ring and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0065] (1) Add terephthalic acid, catalyst, and stabilizer to 83.4ml of ethylene glycol, and stir evenly. Add cis-2,2,4,4-tetramethyl-1,3-cyclobutanediol to 30ml of ethylene glycol, heat to 75°C and stir evenly. Two kinds of slurries are formed and kept in a stirring state, wherein antimony glycol is used in an amount of 250 ppm; trimethyl phosphate is used in an amount of 8 ppm;

[0066] (2) Esterification: When the temperature in the kettle reaches 80°C, move the slurry into the reaction kettle, then turn on the stirring (50rpm), and replace the air in the kettle with nitrogen for 2 times, and then fill the kettle with nitrogen to make the inside of the kettle The pressure reaches 0.2MPa, and the temperature rises to 230°C. During the esterification process, the pressure in the kettle will continue to increase, and the pressure in the kettle will be adjusted and maintained by the regulating valve at the top of the fractionating tower. When the temperature at the top of the f...

Embodiment 2

[0070] (1) Add terephthalic acid, catalyst, and stabilizer to 73.8ml of ethylene glycol, and stir evenly. Add cis-2,2,4,4-tetramethyl-1,3-cyclobutanediol to 35ml of ethylene glycol, heat to 80°C, and stir evenly. Two kinds of slurries are formed and kept in a stirring state, the consumption of ethylene glycol antimony is 260 ppm; the consumption of trimethyl phosphate is 9 ppm;

[0071] (2) Esterification: When the temperature in the kettle reaches 80°C, move the slurry into the reaction kettle, then turn on the stirring (50rpm), and replace the air in the kettle with nitrogen for 2 times, and then fill the kettle with nitrogen to make the inside of the kettle The pressure reaches 0.3MPa, and the temperature rises to 250°C. During the esterification process, the pressure in the kettle will continue to increase, and the pressure in the kettle will be adjusted and maintained by the regulating valve at the top of the fractionating tower. When the temperature at the top of the fra...

Embodiment 3

[0075] (1) Add terephthalic acid, catalyst, and stabilizer to 70.2ml of ethylene glycol, and stir well. Add cis-2,2,4,4-tetramethyl-1,3-cyclobutanediol to 30ml ethylene glycol, heat to 78°C, stir evenly to form two kinds of slurry, keep stirring, ethylene glycol Antimony, the dosage is 270ppm; trimethyl phosphate, the dosage is 10ppm;

[0076] (2) Esterification: When the temperature in the kettle reaches 80°C, move the slurry into the reaction kettle, then turn on the stirring (50rpm), and replace the air in the kettle with nitrogen for 2 times, and then fill the kettle with nitrogen to make the inside of the kettle The pressure reaches 0.4MPa, and the temperature rises to 240°C. During the esterification process, the pressure in the kettle will continue to increase, and the pressure in the kettle will be adjusted and maintained by the regulating valve at the top of the fractionating tower. When the temperature at the top of the fractionating tower reaches 120°C, the esterifi...

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Abstract

The invention provides a PET copolymer containing a non-planar ring and a preparation method. According to the PET copolymer, a third-party monomer is introduced into a PET chain, a cis-form CBDO monomer is adopted, and cis-form CBDO of non-planar ring is added in the direct esterification reaction of PET, so that the performance of the PET polymer can be obviously improved, and particularly the glass transition temperature and the mechanical property are improved; a research result shows that by introducing terephthalic acid CBDO ester into a PET polymer chain, the tenacity of PET can be improved through spatial conformation conversion of the non-planar ring, the glass transition temperature of PET is increased by virtue of the rigidity of steric hindrance of the non-planar ring, and thecomprehensive properties such as mechanical property are improved.

Description

technical field [0001] The invention relates to a non-planar ring-containing PET copolymer and a preparation method. Background technique [0002] At present, PET (ethylene terephthalate) has been mainly used in chemical fibers and in the field of clothing since its inception. The long-term safe use temperature of crystalline PET can reach 120°C; unmodified PET resin can be used in a wide temperature range It has excellent physical and mechanical properties, excellent chemical properties, thermal and electrical properties; low cost and sufficient sources, it is an ideal engineering plastic raw material. [0003] However, PET materials also have many deficiencies, such as low crystallization rate, difficult molding processing, high molding temperature, long production cycle, low impact strength, poor flame retardancy, etc. The unmodified PET (amorphous structure) resin is at 80 It begins to soften at ℃, which cannot meet the high-temperature use requirements of engineering p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/199C08G63/78
CPCC08G63/199C08G63/78
Inventor 杨涛杨铄冰殷宇晨周军锋陈丽颖陈亚龙
Owner JIANGSU GUANGHUI PACKAGE
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