Cross-linking agent for PBAT and preparation method of cross-linking agent

A technology of cross-linking agent and end-capping agent, which is applied in the field of PBAT cross-linking agent and its preparation, can solve the problems of rare film products, short degradation cycle, short service life, etc., achieve good opening and reduce acid value , the effect of prolonging the service life

Active Publication Date: 2017-01-04
YONGKANG NANYI BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, various PBAT resins have emerged in an endless stream, and their application fields are also expanding, but for now, the film products processed by pure PBAT resin are rare, the main reason is that the film products processed by pure PBAT resin Products, its poor opening, is not conducive to processing, and the acid value of pure PBAT resin on the market is generally high, resulting in short degradation cycle and short service life, so it is not conducive to market promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method for a cross-linking agent for PBAT, comprising the following steps:

[0025] (1) At room temperature, the molar ratio of adipic acid and terephthalic acid is 1:5, and the molar ratio of adipic acid, terephthalic acid and polyol is 1:1 to prepare a co- The mixture is put into a reaction kettle equipped with an electric stirrer, an electric heater, a reflux condenser, and a temperature measuring system, and the mass fraction of the blend is 10% of unsaturated fatty acid and the mass fraction is 0.3% of the blend. the catalyst;

[0026] (2) Gradually raise the temperature of the reactor to 200°C and react for 4 hours to obtain the prepolymer;

[0027] (3) Lower the temperature of the reactor to 80°C, add an acid containing double bonds to the prepolymer as a capping agent, the molar ratio of the capping agent to the prepolymer is 1:1, at a temperature of 100°C , reacted for 6 hours;

[0028] (4) Cool down the reactor to 75°C, shut it down and pour i...

Embodiment 2

[0031] A preparation method for a cross-linking agent for PBAT, comprising the following steps:

[0032] (1) At room temperature, the molar ratio of adipic acid and terephthalic acid is 5:1, and the molar ratio of adipic acid, terephthalic acid and polyol is 1:1 to prepare a total The mixture is put into a reaction kettle equipped with an electric stirrer, an electric heater, a reflux condenser, and a temperature measuring system, and the mass fraction of the blend is 10% of unsaturated fatty acid and the mass fraction is 0.3% of the blend. the catalyst;

[0033] (2) Gradually raise the temperature of the reactor to 200°C and react for 4 hours to obtain the prepolymer;

[0034] (3) Lower the temperature of the reactor to 20°C, add an acid containing double bonds to the prepolymer as a capping agent, the molar ratio of the capping agent to the prepolymer is 1:1, at 100°C , reacted for 6 hours;

[0035] (4) Cool down the reactor to 75°C, shut it down and pour it out to obtain...

Embodiment 3

[0038] A preparation method for a cross-linking agent for PBAT, comprising the following steps:

[0039] (1) At room temperature, the molar ratio of adipic acid and terephthalic acid is 1:5, and the molar ratio of adipic acid, terephthalic acid and polyol is 1:2 to prepare a total The mixture is put into a reaction kettle equipped with an electric stirrer, an electric heater, a reflux condenser, and a temperature measurement system, and the mass fraction of the blend is 10% of the unsaturated fatty acid and the mass fraction is 0.3% of the blend. the catalyst;

[0040](2) Gradually raise the temperature of the reactor to 200°C and react for 4 hours to obtain the prepolymer;

[0041] (3) Lower the temperature of the reactor to 15°C, add an acid containing double bonds to the prepolymer as a capping agent, the molar ratio of the capping agent to the prepolymer is 1:1, at 100°C , reacted for 6 hours;

[0042] (4) Cool down the reactor to 75°C, shut it down and pour it out to o...

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PUM

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Abstract

The invention discloses a cross-linking agent for PBAT and a preparation method of the cross-linking agent. The method comprises the following steps that a blend is prepared according to the proportion that the molar ratio of adipic acid to terephthalic acid ranges from 1:5 to 5:1, and the molar ratio of adipic acid and terephthalic acid to polyhydric alcohols ranges from 1:1 to 1:2 and put into a reaction kettle, and unsaturated fatty acid and a catalyst are added; the temperature gradually rises to 200 DEG C to 230 DEG C, reacting is conducted for 4 h to 6 h, and prepolymer is obtained; the temperature is lowered to 80 DEG C to room temperature, acid containing double bonds is added into the prepolymer to serve as a terminator, and reacting is conducted for 6 h to 9 h at 100 DEG C to 140 DEG C, wherein the molar ratio of the terminator to the prepolymer ranges from 1:1 to 1:3; the temperature is lowered to 75 DEG C to 85 DEG C, and then the cross-linking agent for the PBAT is obtained. According to the obtained cross-linking agent, PBAT resin can obtain blow-film grade PBAT resin which is good in processing property and anti-blocking property after cross linking is completed, the acid value of PBAT resin can be decreased, and the service cycle is prolonged.

Description

technical field [0001] The invention relates to a crosslinking agent for PBAT, in particular to a crosslinking agent for PBAT and a preparation method thereof. Background technique [0002] PBAT (polybutylene adipate / terephthalate) is a copolymer of polybutylene adipate and terephthalate, which has excellent biodegradability and has both PBA (polybutyl acrylate) and PBT (Polybutylene terephthalate) has good ductility and elongation at break, as well as good heat resistance and impact performance. Therefore, it has attracted the attention of experts and scholars from all over the world and has become a One of the hotspots of biodegradable plastics research at present. [0003] At present, various PBAT resins have emerged in an endless stream, and their application fields are also expanding, but for now, the film products processed by pure PBAT resin are rare, the main reason is that the film products processed by pure PBAT resin Products, its poor opening, is not conducive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/91C08J3/24
CPCC08G63/183C08G63/91C08J3/24
Inventor 应高波余金金
Owner YONGKANG NANYI BIOLOGICAL TECH
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