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Preparation method of durable polybutylene succinate

A technology of polybutylene succinate and butanediol, which is applied in the polymer field and achieves the effects of good thermal stability, low content of terminal carboxyl groups, and low alkyd molar ratio.

Active Publication Date: 2019-07-23
庞买只
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, there are few documents in the prior art related to capping the carboxyl group at the end of PBS

Method used

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  • Preparation method of durable polybutylene succinate
  • Preparation method of durable polybutylene succinate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 9.9kg of 1,4-butanediol, 11.8kg of succinic acid and 34.4g of composite homogeneous catalyst to the reaction kettle in sequence. Cooling and extruding, during extrusion, inject 344g of pentaerythritol tris(3-aziridinyl)propionate through a pump to obtain polymer A1, with a molecular weight of 115,000 and a carboxyl-terminated content of 8mmol / kg.

[0036] The preparation process of the composite homogeneous catalyst is to add titanium dioxide and zirconium dioxide to 1,4-butanediol in sequence, stir at 60°C for 15 minutes, add 2-methylimidazole, raise the temperature to 120°C, and stir for 50 minutes to obtain a composite type Homogeneous catalyst, the molar ratio of 1,4-butanediol, 5000 mesh titanium dioxide, 5000 mesh zirconium dioxide and 2-methylimidazole is 30:3:2:3.

Embodiment 2

[0040] Add 9.45kg of 1,4-butanediol, 11.8kg of succinic acid and 17.2g of composite homogeneous catalyst to the reaction kettle in sequence. Cooling and extruding, during extrusion, inject 86g of carboxyl end-capping agent trimethylolpropane-tris[3-(2-methylaziridinyl)]propionate by pump to obtain polymer B1, molecular weight is 103,000 , the carboxyl-terminal content is 10mmol / kg.

[0041] The preparation process of the composite homogeneous catalyst is to add titanium dioxide and zirconium dioxide to 1,4-butanediol in sequence, stir at 40°C for 30 minutes, add 1-ethylimidazole, raise the temperature to 140°C, and stir for 40 minutes to obtain a composite type Homogeneous catalyst, the molar ratio of 1,4-butanediol, 8000 mesh titanium dioxide, 8000 mesh zirconium dioxide and 1-ethylimidazole is 20:3:2:3.

Embodiment 3

[0045] Add 10.35kg of 1,4-butanediol, 11.8kg of succinic acid and 1.72g of composite homogeneous catalyst to the reaction kettle in sequence. Cooling is extruded, and when extruding, inject carboxyl end-blocking agent 17.2g trimethylolpropane-tris(3-aziridinyl) propionate by pump, obtain polymer C1, molecular weight is 101,000, and carboxyl-terminated content is 15mmol / kg.

[0046] The preparation process of the composite homogeneous catalyst is to add titanium dioxide and zirconium dioxide to 1,4-butanediol in sequence, stir at 50°C for 15 minutes, add 2-propylimidazole and 4-methylimidazole, and heat up to 130°C. Stir for 50 minutes to obtain a composite homogeneous catalyst. The molar ratio of 1,4-butanediol, 10,000 mesh titanium dioxide, 10,000 mesh zirconia, 2-propylimidazole, and 4-methylimidazole is 10:3:2:2 :1.

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Abstract

The invention belongs to the technical field of macromolecules, and particularly relates to a preparation method of durable polybutylene succinate. The preparation method comprises the following stepsof utilizing a compounded homogeneous catalyst firstly to catalyze1,4-butanediol and succinic acid to polymerize, and then extruding to obtain the durable polybutylene succinate; during extrusion, injecting a compound, which contains aziridine groups, into polybutylene succinate melt so as to be used for end-capping. The terminal carboxyl group content of the durable polybutylene succinate prepared by the invention is as low as less than or equal to 15mmol / kg, and the durability and heat stability of the durable polybutylene succinate are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and in particular relates to a preparation method of durable polybutylene succinate. Background technique [0002] Since its birth, plastics have rapidly enriched people's lives with its superior performance. However, plastic is also placing an increasing burden on the environment due to its overuse and dependence on plastic and improper disposal methods. Aliphatic polyester has good biodegradability, which is beneficial to solve the problem of "white pollution" caused by traditional plastics, and has attracted more and more attention and attention. [0003] As we all know, dibasic acid and dibasic alcohol can be obtained polyester after esterification and polycondensation reaction. Theoretically, the terminal groups of polyester should be hydroxyl groups, but during the polymerization process, due to oxidative pyrolysis and other reasons, some of the terminal groups of polyester molecul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/16C08G63/85
CPCC08G63/16C08G63/85C08G63/916
Inventor 庞买只
Owner 庞买只
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