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Production method of complete biodegradable aliphatic polyester

The technology of aliphatic polyester and production method is applied in the field of production of completely biodegradable aliphatic polyester, which can solve the problems of complex production process, thermal stability, poor environmental friendliness in tensile ductility, aliphatic polyester Low weight-average molecular weight and other problems, to achieve the effect of good color and good thermal stability

Inactive Publication Date: 2011-11-02
ZHEJIANG BILI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] What the present invention aims to solve is that the weight-average molecular weight of the aliphatic polyester obtained by the existing production method is low, the heat stability, tensile ductility and environmental friendliness are poor, the production process is complicated, and it is necessary to add chain extenders and branching agents. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 1.3mol of 1.4 butanediol, 0.8mol of succinic acid, and 0.2mol of adipic acid into a 1L reaction flask (with stirring device, nitrogen filling device, condenser device, and vacuum device), and start stirring The device is heated to 160°C under the protection of nitrogen, and 0.005mol methanesulfonic acid is added, and the by-products generated by the reaction are discharged through the condenser. After reacting for a period of time, test that the acid value is below 10 mg, add 0.005 mol of a copolymer of titanium dioxide and silicon dioxide, heat to 200 ° C, reduce pressure to 5000 Pa, and react for 1.5 hours. Add 0.002 mol of stannous chloride, raise the temperature to 250° C., reduce the pressure to 70 Pa, and react for 6 hours to obtain a copolyester of polysuccinic acid-butanediol-adipic acid.

[0041]The weight average molecular weight of the polyester is about 180,000, and the molecular weight distribution range is about 1.8. The obtained polymer is a white so...

Embodiment 2

[0043] Add 1.5 mol of 1.4 butanediol and 1 mol of succinic acid into a 1L reaction bottle (with stirring device, nitrogen filling device, condenser device, and vacuum device), start the stirring device, and heat to 150°C, while reducing the pressure to 30000pa, add 0.001mol heteropolyacid, and the by-products generated by the reaction are discharged through the condenser. After reacting for a period of time, after testing that the acid value is below 10 mg, add 0.002 mol of titanium dioxide and silicon dioxide copolymer, heat to 200 ° C, reduce pressure to 5000 Pa, and react for 1 hour. Add 0.005 mol of antimony acetate, raise the temperature to 240° C., reduce the pressure to 50 Pa, and react for 5 hours to obtain polybutylene succinate.

[0044] The weight average molecular weight of the polyester is about 200,000, and the molecular weight distribution range is about 1.7. The obtained polymer is a white solid, the melt index is below 10 g / min, the tensile property is good, ...

Embodiment 3

[0046] Add 1.2 mol of butanediol and 1 mol of adipic acid into a 1L reaction flask (with stirring device, nitrogen filling device, condenser device, and vacuum device), start the stirring device, and heat to 170 °C under nitrogen protection. ℃, add 0.001mol p-toluenesulfonic acid, and the by-products generated by the reaction are discharged through the condenser. After reacting for a period of time, test that the acid value is below 10 mg, add 0.004 mol of titanium dioxide and silicon dioxide copolymer, heat to 200 ° C, reduce pressure to 7000 Pa, and react for 2 hours. Add 0.003mol of stannous chloride, raise the temperature to 230°C, reduce the pressure to 100pa, and react for 7 hours to obtain polybutylene adipate.

[0047] The weight-average molecular weight of the polyester is about 160,000, and the molecular weight distribution range is about 1.5. The obtained polymer is a white solid, the melt index is below 10 g / min, and has good tensile and ductile properties and the...

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Abstract

The invention discloses a production method of complete biodegradable aliphatic polyester. The production method comprises the following three steps: (1) an esterification phase that: aliphatic dibasic acid monomer and aliphatic dibasic alcohol monomer are added to a reactor according to certain proportions, an esterification catalyst is added, and a normal-pressure esterification reaction is carried out under the protection of an inert gas; (2) a pre-concentration phase that: when the esterification reaction is completely finished, a main catalyst is added, and the mixture is subject to a reaction for 1 to 2 hours; (3) a concentration phase: an auxiliary catalyst is added, and the mixture is subject to a reaction for 4 to 9 hours, such that aliphatic ???? with a weight average molecular weight greater than 150 thousands is obtained. The polyester product provided by the present invention has good heat stability, stretching ductility, environment friendly performance and a good color, and can be biodegraded.

Description

technical field [0001] The invention relates to a production method of a completely biodegradable aliphatic polyester, in particular to a method for preparing a high-molecular-weight aliphatic polyester with a weight average molecular weight of 150,000 to 200,000 in one step using a high-efficiency catalyst. Background technique [0002] At present, plastic materials are one of the most used materials in our daily life. Conventional plastics have excellent comprehensive properties and are widely used in various aspects such as construction, agriculture, and packaging. However, these materials are very stable in nature, and waste is difficult to decompose in nature. For this reason, people began to do a lot of research on degradable materials, and aliphatic polyester has been widely concerned as a completely biodegradable material. Aliphatic polyesters are known to be biodegradable, but their poor mechanical properties and processability are not conducive to their applicatio...

Claims

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Application Information

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IPC IPC(8): C08G63/16C08G63/87C08G63/85C08G63/86
Inventor 王彤
Owner ZHEJIANG BILI PACKAGING
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