Poly(butylene succinate) and preparation method thereof

A technology of polybutylene succinate and polybutylene succinate, which is applied in the field of high-molecular-weight polybutylene succinate and its preparation, can solve problems such as limiting the application range of products, and achieve low cost , short reaction time, less side effects

Inactive Publication Date: 2012-07-25
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 weigh

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
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Example Embodiment

[0021] Example 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 increase the temperature, and reflux and water separation at 140℃ After 60 minutes, toluene was distilled out. The molar ratio of succinic acid:1,4-butanediol:tin chloride:p-toluenesulfonic acid was 1:1.1:0.002:0.001, and 1 mole of succinic acid was added Correspondingly add 500 ml of toluene; (2) Melt polycondensation stage: After the toluene is evaporated, the reflux water separator is changed to a vacuum device, protected by nitrogen, stirred and heated, and melt polycondensation is reacted at 230°C and 5mmHg vacuum for 60 minutes; 3) Dibasic acid chloride chain extension stage: After step (2), return to normal pressure, lower the temperature to 130℃, install a gas absorption device, pass nitrogen protection, and then add the chain extender dibasic acid chloride to react ...

Example Embodiment

[0023] Example 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 raise the temperature, and reflux at 145°C. After 120 minutes of water, toluene was distilled out. The molar ratio of succinic acid:1,4-butanediol:tin chloride:p-toluenesulfonic acid was 1:1.1:0.002:0.001. Add 500 ml of toluene for acid; (2) Melt polycondensation stage: After the toluene is evaporated, the reflux water separator is changed to a vacuum device, protected by nitrogen gas, stirred and heated, and melted and polycondensed at 230°C and 5mmHg 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 the chain extender dibasic acid chloride under rapid stirring to react at normal pressure 10 Minutes, the d...

Example Embodiment

[0025] Example 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 raise the temperature, and reflux and separate water at 150℃ After 90 minutes, toluene was distilled out. The molar ratio of succinic acid:1,4-butanediol:tin chloride:p-toluenesulfonic acid was 1:1.1:0.002:0.001, and 1 mole of succinic acid was added Then 500 ml of toluene was added correspondingly; (2) Melt polycondensation stage: After the toluene was evaporated, the reflux water separator was changed to a vacuum device, protected by nitrogen, stirred and heated, and melted and polycondensed at 230°C and a vacuum of 5mmHg for 90 minutes; 3) Dibasic acid chloride chain extension stage: After step (2), return to normal pressure, lower the temperature to 170°C, install a gas absorption device, pass nitrogen protection, and then add the chain extender dibasic acid chloride to ...

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