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Preparation method of biodegradable plastic poly(butylene succinate)

A technology of polybutylene succinate and biodegradable plastics, which is applied in the field of preparation of biodegradable plastic polybutylene succinate, can solve the problems of many small molecules by-products and low yield, and achieve improved Effects of product competitiveness, improvement of reaction efficiency, and cost reduction

Inactive Publication Date: 2017-11-21
淄博长宝新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can overcome the problems of many by-product small molecules and low yield in the prior art, thereby effectively reducing the production cost of polybutylene succinate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] After tetrahydrofuran and hydrogen iodide with a molar ratio of 1:2 undergo a ring-opening reaction, they are added to a device equipped with heating, temperature control, stirring, and nitrogen protection. At a temperature of 115°C, succinic acid (succinic acid and Tetrahydrofuran molar ratio is 1: 1.2), according to succinic acid, tetrahydrofuran total weight is calculated as 0.1% tetrabutyl titanate under the action of esterification reaction for 2 hours; finally carry out polycondensation reaction under vacuum condition, vacuum degree is absolute pressure 90Pa , the reaction temperature was 195°C, and the reaction time was 3 hours to obtain the crude polybutylene succinate, which was dissolved in chloroform for purification, precipitated with anhydrous methanol, filtered and dried to obtain the polybutylene succinate product.

Embodiment 2

[0026] After tetrahydrofuran and hydrogen iodide with a molar ratio of 1:1.6 undergo a ring-opening reaction, they are added to a device equipped with heating, temperature control, stirring, and nitrogen protection. At a temperature of 160°C, succinic acid (succinic acid and Tetrahydrofuran molar ratio is 1: 1.3), according to succinic acid, tetrahydrofuran total weight is calculated as 0.1% tetrabutyl titanate under the action of esterification reaction for 2 hours; Finally carry out polycondensation reaction under vacuum condition, vacuum degree is absolute pressure 100Pa , the reaction temperature was 200°C, and the reaction time was 2 hours to obtain the crude polybutylene succinate, which was dissolved in chloroform for purification, precipitated with anhydrous methanol, filtered and dried to obtain the polybutylene succinate product.

Embodiment 3

[0028] After tetrahydrofuran and hydrogen iodide with a molar ratio of 1:2.5 undergo a ring-opening reaction, they are added to a device equipped with heating, temperature control, stirring, and nitrogen protection. At a temperature of 160°C, succinic acid (succinic acid and Tetrahydrofuran molar ratio is 1: 1.2), by succinic acid, tetrahydrofuran total weight meter is 0.5% stannous butyrate effect under esterification reaction 2 hours; Carry out polycondensation reaction under vacuum condition at last, vacuum tightness is absolute pressure 100Pa, The reaction temperature is 210°C, and the reaction time is 3 hours to obtain a crude polybutylene succinate product, which is dissolved in chloroform for purification, precipitated with anhydrous methanol, filtered and dried to obtain a polybutylene succinate product.

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Abstract

The invention provides a preparation method of a biodegradable plastic poly(butylene succinate). The traditional polyolefin plastic is undegradable, so that the serious problem of environmental pollution is caused; as a molecular main chain of a degradable plastic contains an easily hydrolyzable ester bond, the degradable plastic is decomposed and metabolized easily in nature and is finally decomposed into carbon dioxide and water. The specific technical scheme is described as follows: performing a ring-opening reaction on tetrahydrofuran and a promoter hydrogen iodide, adding a product into a succinic acid device with functions of heating for temperature control, stirring and nitrogen protection and performing an esterification reaction for 1-3h under the action of a catalyst at the temperature of 95-200 DEG C; finally, performing a polycondensation reaction under a vacuum condition for 2-3h, so as to obtain a poly(butylene succinate) crude product, wherein the absolute pressure is 20-80Pa, and the reaction temperature is 135-235 DEG C; dissolving the crude product with purification-used trichloromethane, precipitating with absolute methanol, filtering and drying, so as to obtain poly(butylene succinate).

Description

technical field [0001] The invention relates to the field of polymer material synthesis, in particular to a preparation method of biodegradable plastic polybutylene succinate. Background technique [0002] Traditional polyolefin plastics are not degradable, and their products have caused serious environmental pollution problems. Degradable plastics have become an effective way to fundamentally solve this problem. Polybutylene succinate (PBS), as an aliphatic polyester plastic, is prone to hydrolysis under the action of enzymes in various microorganisms or animals and plants in nature because its molecular backbone contains ester bonds that are easily hydrolyzed. Decomposition, metabolism, and finally decomposed into carbon dioxide and water. Therefore, polybutylene succinate, as a typical fully biodegradable material, can be used as various plastic products, such as packaging, tableware, cosmetic bottles, medicine bottles, agricultural materials and medical materials, etc. ...

Claims

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Application Information

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IPC IPC(8): C08G63/16C08G63/78C08G63/85C07C29/10C07C31/20
CPCC08G63/16C07C29/10C08G63/78C08G63/85C08G2230/00C07C31/207
Inventor 刘长宝刘俊成
Owner 淄博长宝新材料股份有限公司
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