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PBAT resin composition and preparation method thereof

A resin composition and a technology for the composition are applied in the field of polymer material synthesis, which can solve the problems of low product gloss, decreased melt fluidity, and increased difficulty, and achieve widened application fields, high gloss, and good melt. The effect of liquidity

Active Publication Date: 2021-10-26
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although PBAT has good application value, there are still a series of problems in the production process of PBAT, which limits its large-scale application.
For example, in the process of synthesizing PBAT, due to improper selection of catalysts or defects in the reaction process, the product will have low gloss and yellow color
Although the molecular weight can be greatly increased by chain extension or viscosity increase, the decrease in melt fluidity also increases the difficulty of post-processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Weigh 1000g of terephthalic acid, 1000g of adipic acid, 1700g of 1,4-butanediol, 0.37g of n-butyl titanate, and 0.0016g of dimethyl glutarate into a 5L reaction kettle, start stirring, and nitrogen Replace 3 times, keep normal pressure. Raise the temperature of the reaction system to 220°C, and react for 90 minutes; after the esterification reaction, raise the temperature to 240°C, vacuumize to an absolute pressure of 5kPa, and carry out the pre-condensation reaction, the reaction time is 60min; the reaction kettle is decompressed within 30min to an absolute pressure of 5 Pa high vacuum, after reacting at 250°C for 3 hours, stop stirring, fill the reactor with nitrogen to restore the normal pressure of the reactor to obtain a PBAT melt, and extrude it under the protection of nitrogen, cool to room temperature and cut into pellets to obtain PBAT resin composition. The content of dimethyl glutarate in the PBAT resin composition is 0.57ppm (based on the total weight of th...

Embodiment 2

[0075] Weigh 1000g of terephthalic acid, 1000g of adipic acid, 1700g of 1,4-butanediol, 0.37g of n-butyl titanate, and 0.0036g of dimethyl glutarate into a 5L reaction kettle, start stirring, and nitrogen Replace 3 times, keep normal pressure. Raise the temperature of the reaction system to 220°C, and react for 90 minutes; after the esterification reaction, raise the temperature to 240°C, vacuumize to an absolute pressure of 5kPa, and carry out the pre-condensation reaction, the reaction time is 60min; the reaction kettle is decompressed within 30min to an absolute pressure of 5 Pa high vacuum, after reacting at 250°C for 3 hours, stop stirring, fill the reactor with nitrogen to restore the normal pressure of the reactor to obtain a PBAT melt, and extrude it under the protection of nitrogen, cool to room temperature and cut into pellets to obtain PBAT resin composition. The content of dimethyl glutarate in the PBAT resin composition is 1.04ppm (based on the total weight of th...

Embodiment 3

[0077] Weigh 1000g of terephthalic acid, 1000g of adipic acid, 1700g of 1,4-butanediol, 0.37g of n-butyl titanate, and 0.0088g of dimethyl glutarate into a 5L reaction kettle, start stirring, and nitrogen Replace 3 times, keep normal pressure. Raise the temperature of the reaction system to 220°C, and react for 90 minutes; after the esterification reaction, raise the temperature to 240°C, vacuumize to an absolute pressure of 5kPa, and carry out the pre-condensation reaction, the reaction time is 60min; the reaction kettle is decompressed within 30min to an absolute pressure of 5 Pa high vacuum, after reacting at 250°C for 3 hours, stop stirring, fill the reactor with nitrogen to restore the normal pressure of the reactor to obtain a PBAT melt, and extrude it under the protection of nitrogen, cool to room temperature and cut into pellets to obtain PBAT resin composition. The content of dimethyl glutarate in the PBAT resin composition is 4.02ppm (based on the total weight of th...

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Abstract

The invention relates to a PBAT resin composition and a preparation method thereof, which mainly solve the problems of poor hue and poor melt flowability of PBAT resin in the prior art. The PBAT resin composition comprises poly(butylene adipate terephthalate) and dimethyl glutarate. Based on the total weight of the PBAT resin composition, the weight content of the dimethyl glutarate is 0.05 ppm to 1000 ppm. The PBAT resin composition has excellent glossiness and yellowing resistance, and can improve the flowability of PBAT melt and improve the processability.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and in particular relates to a PBAT resin composition with high gloss, yellowing resistance and good melt fluidity and a preparation method thereof. Background technique [0002] The main chain of polybutylene terephthalate adipate (PBAT) is composed of aliphatic structural units and aromatic structural units connected by easily hydrolyzed ester bonds, which are easily destroyed by various microorganisms or animals and plants in nature. Enzymatic catabolism in the body, eventually converted to CO 2 and H 2 O. Compared with traditional biodegradable polyesters, PBAT has a higher melting point and has good mechanical ductility and processability. It can be processed by injection molding, blow molding, blown film and other molding methods, so it is extremely versatile. Not only can it be used in the field of packaging, but also in the field of medicine and health and agriculture, which m...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K5/11C08G63/183
CPCC08K5/11C08G63/183C08L67/02
Inventor 高梦云胡江林王雨龙方文娟陈建旭姜庆梅刘岩麻宁刘振伟黎源
Owner WANHUA CHEM GRP CO LTD
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