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Poly(terephthalate glycol ester-CO-glycolate) copolyester and preparation method thereof

A technology of ethylene terephthalate and terephthalate is applied in the field of poly(ethylene terephthalate-CO-glycolate) copolyester and its preparation, and can solve the problem of copolyester. The performance of polyester is very different, stainless steel is corrosive, and the preparation method is complicated, so as to achieve the effect of low cost, cost reduction and simple method

Active Publication Date: 2012-10-10
南通海晴医药科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Disclosed in CN200710046872 is the preparation method of polyethylene terephthalate succinate, and this copolyester also has certain biodegradability, but preparation method is relatively complicated, and raw material is not easy to obtain, and the performance of copolyester simultaneously Significantly different properties from polyethylene terephthalate
[0006] Disclosed in CN201010201931.X is the preparation method of poly(propylene glycol terephthalate)ethylene glycol copolyester, the acidity of its oxalic acid is relatively strong, it is corrosive to stainless steel, it is directly used as a comonomer, and it is difficult to directly carry out the copolymerization reaction

Method used

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  • Poly(terephthalate glycol ester-CO-glycolate) copolyester and preparation method thereof
  • Poly(terephthalate glycol ester-CO-glycolate) copolyester and preparation method thereof
  • Poly(terephthalate glycol ester-CO-glycolate) copolyester and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Add 0.99mol of terephthalic acid, 1.28mol of ethylene glycol, 0.045g of antimony trioxide, 0.035g of polyphosphoric acid into a batch reactor, and esterify at 230-235°C and a pressure of 0.43MPa (gauge pressure). React for 2 hours, fractionate the water, and stop the esterification when the fractionated water is greater than or equal to 95% of the theoretical water mass. The temperature of the reaction system is lowered to 200-210°C. After adding 0.01mol of polyglycolic acid ester oligomers, gradually reduce the pressure and increase the temperature. After 90 minutes, the vacuum degree of the reactor reaches 100Pa (absolute pressure), and the reaction temperature is maintained at 260- At 265°C, after 120 minutes of polymerization, when the rated stirring power is reached, the polymerization reaction is terminated, and the vacuum is replaced by nitrogen, and a poly(ethylene terephthalate-CO-glycolate) copolymer can be obtained through cold water and pelletizing. polyeste...

Embodiment 2

[0037] Add 0.95mol of terephthalic acid, 1.23mol of ethylene glycol, 0.050g of ethylene glycol antimony, and 0.040g of polyphosphoric acid into a batch reactor, and esterify at 230-235°C and a pressure of 0.43MPa (gauge pressure). React for 2 hours, fractionate the water, and stop the esterification when the fractionated water is greater than or equal to 95% of the theoretical water mass. The temperature of the reaction system is lowered to 200-210°C. After adding 0.05mol of polyglycolic acid ester oligomers, gradually reduce the pressure and increase the temperature. After 90 minutes, the vacuum degree of the reactor reaches 100Pa (absolute pressure), and the reaction temperature is maintained at 260- At 265°C, after 120 minutes of polymerization, when the rated stirring power is reached, the polymerization reaction is terminated, and the vacuum is replaced by nitrogen, and a poly(ethylene terephthalate-CO-glycolate) copolymer can be obtained through cold water and pelletizing...

Embodiment 3

[0039] Add 0.85mol of terephthalic acid, 1.1mol of ethylene glycol, 0.046g of complexed titanium, and 0.033g of polyphosphoric acid into a batch reactor, and perform esterification reaction at 230-235°C and a pressure of 0.43MPa (gauge pressure). 2h, fractionate the water, when the fractionated water is greater than or equal to 95% of the theoretical water mass, stop the esterification. The temperature of the reaction system was lowered to 200-210°C. After adding 0.15mol of polyglycolic acid ester oligomers (without catalyst), the pressure was gradually reduced and the temperature was raised. After 90 minutes, the vacuum degree of the reactor reached 100Pa (absolute pressure), and the reaction temperature Maintain at 260-265°C, end the polymerization reaction when the rated stirring power is reached after 135 minutes of polymerization, replace the vacuum with nitrogen, and get a poly(ethylene terephthalate-CO-ethanol) through cold water and cutting into pellets ester) copolyes...

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Abstract

The invention relates to a poly(terephthalate glycol ester-CO-glycolate) copolyester and a preparation method thereof. The poly(terephthalate glycol ester-CO-glycolate) copolyester has the melting point of 200-250 DEG C, has the intrinsic viscosity of 0.6-1.2 dL / g, and is biodegradable. The preparation method is simple; raw materials are low in cost; the product performance has a smaller difference from that of PET (polyethylene terephthalate); and the copolyester can be applied to preparation of fibers, films, sheets, bottles and other plastic products.

Description

technical field [0001] The invention belongs to the field of polyester preparation, and in particular relates to a poly(ethylene terephthalate-CO-glycolate) copolyester and a preparation method thereof. Background technique [0002] Aromatic polyester packaging materials represented by PET (polyethylene terephthalate) can maintain excellent physical properties and impact resistance in a wide temperature range, and are resistant to friction, high rigidity, and hygroscopicity. Small size, good dimensional stability, convenient processing, clean and transparent appearance of the parts, and the ability to resist most organic solvents and inorganic acids are favored by packaging, chemical fiber and other industries. Due to the water resistance of its own ester bonds, PET polyester waste is difficult to degrade naturally in nature. Only under extreme conditions such as a high temperature above 200°C or a strong alkaline environment can there be a relatively fast hydrolysis rate. ...

Claims

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Application Information

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IPC IPC(8): C08G63/60C08G63/78
Inventor 崔爱军田俊凯蒋卫华李静陈群何明阳
Owner 南通海晴医药科技有限公司
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