Poly(butylene succinate) and preparation method thereof

A technology of polybutylene succinate and succinic acid is applied in the field of high molecular weight polybutylene succinate and its preparation, which can solve the problems such as limiting the application scope of the product, and achieves low cost, short time, and low cost. Less side effects

Inactive Publication Date: 2014-06-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101077905A has reported the method that uses dibasic isocyanate to carry out chain extension reaction to the polybutylene succinate prepolymer of low molecular weight and prepares the polybutylene succinate of high molecular weight, but the toxicity of dibasic isocyanate chain extender Limit the scope of application of the product

Method used

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  • Poly(butylene succinate) and preparation method thereof
  • Poly(butylene succinate) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Solution esterification stage: Add succinic acid, 1,4-butanediol, toluene, stannous chloride and p-toluenesulfonic acid into the reflux water separation reaction device, stir and heat up, and reflux water separation at 140°C After 60 minutes, the toluene was evaporated, and the succinic acid: 1,4-butanediol: tin protochloride: the mol ratio of p-toluenesulfonic acid was 1: 1.1: 0.002: 0.001, every time 1 mole of succinic acid was added Then correspondingly add 500 milliliters of toluene; (2) melt polycondensation stage: after steaming out the toluene, change the reflux water separation device to a vacuum device, protect with nitrogen, stir and heat up, and melt and polycondense for 60 minutes at 230° C. and 5 mmHg vacuum degree; 3) Dibasic acid chloride chain extension stage: return to normal pressure after step (2), lower the temperature to 130°C, install a gas absorption device, pass nitrogen protection, and then add chain extender dibasic acid chloride under rapid...

Embodiment 2

[0024] (1) Solution esterification stage: Add succinic acid, 1,4-butanediol, toluene, stannous chloride and p-toluenesulfonic acid into the reflux water separation reaction device, stir and heat up, at 145 ° C, reflux separation After 120 minutes of water, the toluene was evaporated, and the succinic acid: 1,4-butanediol: tin protochloride: the mol ratio of p-toluenesulfonic acid was 1: 1.1: 0.002: 0.001, every time 1 mole of butanediol was added Add 500 ml of toluene to the acid; (2) melt polycondensation stage: change the reflux water separation device to a vacuum device after steaming out the toluene, protect with nitrogen, stir and heat up, and melt and polycondense at 230 ° C and 5 mmHg vacuum for 120 minutes; (3) Dibasic acid chloride chain extension stage: After step (2), return to normal pressure, lower the temperature to 150°C, install a gas absorption device, pass nitrogen protection, and then add chain extender dibasic acid chloride under rapid stirring to react at n...

Embodiment 3

[0026] (1) Solution esterification stage: Add succinic acid, 1,4-butanediol, toluene, stannous chloride and p-toluenesulfonic acid into the reflux water separation reaction device, stir and heat up, and reflux water separation at 150°C After 90 minutes, the toluene was evaporated, and the succinic acid: 1,4-butanediol: tin protochloride: the mol ratio of p-toluenesulfonic acid was 1: 1.1: 0.002: 0.001, every time 1 mole of succinic acid was added Then correspondingly add 500 milliliters of toluene; (2) melt polycondensation stage: after steaming out the toluene, change the reflux water separation device to a vacuum device, protect with nitrogen, stir and heat up, and melt and polycondense for 90 minutes at 230° C. and 5 mmHg vacuum degree; 3) Dibasic acid chloride chain extension stage: return to normal pressure after step (2), lower the temperature to 170°C, install a gas absorption device, pass nitrogen protection, and then add chain extender dibasic acid chloride under rapid...

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Abstract

The invention provides poly(butylene succinate) and a preparation method thereof, which are characterized in that succinic acid and 1,4-butanediol are used as raw materials, a continuous preparation method comprising the steps of solution esterification, melt polycondensation and diacyl chloride chain extension is adopted, and the prepared poly(butylene succinate) has the number-average molecular weight larger than 7.0*10<4> and the molecular weight distribution range of 1.6-1.9. Compared with the traditional melt polycondensation method and diisocyanate chain extension method, the preparation method provided by the invention has the advantages of short required time, low cost, high product molecular weight, narrow molecular weight distribution range, light color, no toxicity, no cross-linking in the chain extension process, easily biodegraded product and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of aliphatic polyester, and in particular relates to a high molecular weight polybutylene succinate and a preparation method thereof. Background technique [0002] Due to the non-degradability of traditional polyolefin plastics, waste plastics have caused serious pollution to the environment. In order to reduce this pollution, people have turned their research direction to degradable plastics, among which biodegradable plastics are the main research target. Aliphatic polyester plastics are easy to biodegrade under the action of biological enzymes due to the easily hydrolyzed ester bonds in the main chain of the molecule, and have become one of the research and development hotspots worldwide. Among them, polybutylene succinate (PBS) has become one of the few commercialized biodegradable plastics because of its high melting point and relatively good processing performance. [0003] The traditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/16C08G63/78
Inventor 张昌辉张敏王磊
Owner SHAANXI UNIV OF SCI & TECH
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