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High molecular weight aliphatic-aromatic copolyester and preparation method thereof

A high-molecular-weight, aromatic technology, applied in the field of polymer materials, can solve problems such as difficult control and complex operation of chain extension methods, and achieve the effects of simplifying production processes, reducing production costs, and continuous production

Inactive Publication Date: 2014-01-01
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation method of high molecular weight aliphatic-aromatic copolyester, to solve the technical problem that the chain extension mode operation that exists in the preparation method of PBAT in the prior art is complicated, difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add PTA, AA, BG and antimony trioxide into a 10L batch polymerization tank with agitator, wherein the ratio of the amount of substances n(PTA):n(AA)=1:1, n(PTA+AA) :n(BG)=1.2:1, antimony trioxide accounts for 0.5wt% of the total acid mass. The system was blown with nitrogen, and the temperature was raised to 180° C. under normal pressure to carry out the esterification reaction. When the distillate water in the esterification reaction was exhausted, vacuuming was started, and the reaction temperature was increased, and the polycondensation reaction was carried out at 240°C. After the polycondensation reaction was completed for 5 hours, the PBAT prepolymer was obtained, and the number average molecular weight was measured to be 2320.

[0032] Stir the PBAT prepolymer and the chain extender toluene diisocyanate with a high-speed mixer at room temperature, and then add them to the twin-screw extruder. The chain extender accounts for 0.3wt% of the PBAT prepolymer, the aspe...

Embodiment 2

[0034] Add PTA, BG and tetrabutyl titanate to a 10L batch polymerization kettle with a stirrer, the molar percentage of BG added to the total BG is the molar percentage of PTA to the total acid, and the system is ventilated with nitrogen, under normal pressure Raise the temperature to 190°C to carry out the esterification reaction. When the water output reaches the theoretical value, add AA and BG into the reaction kettle. Wherein the ratio of the amount of total substance n(PTA):n(AA)=1.2:1, n(PTA+AA):n(BG)=1.3:1, tetrabutyl titanate accounts for 0.3wt of the total mass of acid %. The esterification reaction was continued at 190°C. When the distillate water in the esterification reaction was exhausted, vacuuming was started, and the reaction temperature was increased, and the polycondensation reaction was carried out at 270 ° C. The polycondensation reaction was completed after 6 hours, and the PBAT prepolymer was obtained. The measured number average molecular weight was 18...

Embodiment 3

[0037] Add DMT, BG and antimony acetate to a 10L batch-type polymerization kettle with a stirrer. The molar percentage of BG to the total BG is the molar percentage of PTA to the total acid. Nitrogen is passed through the system, and the temperature is raised to 170 The esterification reaction is carried out at ℃, and when the distillate methanol of the esterification reaction is exhausted, add AA and BG into the reaction kettle. The ratio of the total amount of substances n(DMT):n(AA)=1.3:1, n(DMT+AA):n(BG)=1.5:1, antimony acetate accounts for 0.3wt% of the total mass of the acid. Continue to carry out the esterification reaction at 170°C, start vacuuming when the distillate water and methanol in the esterification reaction are exhausted, and raise the reaction temperature, and carry out the polycondensation reaction at 280°C, the polycondensation reaction ends after 8 hours, and the PBAT pre- Polymer, the measured number average molecular weight is 32180.

[0038] Stir the ...

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Abstract

The invention relates to the technical field of polymer materials, and especially relates to high molecular weight aliphatic-aromatic copolyester and a preparation method thereof. The preparation method of high molecular weight aliphatic-aromatic copolyester comprises following steps: (1) adding aromatic monomers, 1,4-butanediol, hexanedioic acid, and a catalyst into an intermittent reactor, carrying out esterification reactions under the protection of inert gas, and carrying out condensation polymerization reactions after the esterification reactions are over so as to obtain a PBAT prepolymer; (2) subjecting the obtained PBAT prepolymer to a chain propagation treatment with a double screw extruder when adopting a chain extender so as to obtain a PBAT copolyester with a number-average molecular weight Mn of 10000 to 100000. Compared to the prior art, the preparation method of PBAT copolyester is capable of simplifying the production technology, and has the advantages of controllable operation, realization of continuous production, and reduction on production cost.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high molecular weight aliphatic-aromatic copolyester and a preparation method thereof. Background technique [0002] With the rapid economic growth, the use of polymer materials has penetrated into all areas of people's lives. However, because most of the commonly used polymer materials are difficult to biodegrade, they are discarded into nature after use, causing serious impact on the ecological environment. Therefore, the development of environmentally friendly biodegradable polymer materials has become a research hotspot at home and abroad. [0003] Poly(butylene terephthalate-co-butylene adipate) (PBAT) is an aliphatic-aromatic copolyester. It not only has good ductility and toughness, but also has good heat resistance and impact performance; at the same time, this copolyester also has good biodegradability, and is an environmentally friendly polymer material th...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G59/40C08G63/685C08G63/183
CPCC08G18/4216C08G59/40C08G63/183C08G63/6856
Inventor 袁角亮赵冬云严莉莉
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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