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Preparation method and application of a fully biodegradable resin with excellent hydrolysis resistance

A technology of degrading resin and whole biology is applied in the field of preparation of whole biodegradable resin, which can solve the problems of easy hydrolysis and difficult to meet the requirements of crop growth cycle in the service cycle.

Active Publication Date: 2021-06-25
新疆蓝山屯河高端新材料工程技术研究中心有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the above materials are used as mulch, they are prone to hydrolysis, and the use cycle is difficult to meet the growth cycle requirements of crops.

Method used

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  • Preparation method and application of a fully biodegradable resin with excellent hydrolysis resistance
  • Preparation method and application of a fully biodegradable resin with excellent hydrolysis resistance

Examples

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preparation example Construction

[0026] The invention provides a kind of preparation method of full biodegradable resin, comprises the following steps:

[0027] mixing terephthalic acid, 1,4-butanediol and a nucleating agent to perform an esterification and dehydration reaction to obtain a first intermediate product system;

[0028] Mixing the first intermediate product system with adipic acid, performing a second esterification and dehydration to obtain a second intermediate product system;

[0029] mixing the second intermediate product system, a catalyst and a stabilizer, and performing a polycondensation reaction to obtain a fully biodegradable resin;

[0030] The full biodegradable resin is PBAT.

[0031] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0032] The invention mixes terephthalic acid, 1,4-butanediol and a nucleating agent to carry out esterification and dehydration reaction to ob...

Embodiment 1

[0051] Mix 1kg of terephthalic acid and 3kg of 1,4-butanediol, heat to 200°C, stir evenly, mix with 20g of nucleating agent (β-cyclodextrin), and carry out negative pressure esterification dehydration at 180°C Reaction for 3 hours (at this time, the water yield reached 87% of the theoretical value, and the value of the esterified carboxyl group was 598mol / t), and the first intermediate product system was obtained;

[0052] The first intermediate product system is mixed with 1 kg of adipic acid under stirring conditions, and the negative pressure esterification dehydration reaction is carried out at 240 ° C for 2 hours (at this time, the water output reaches 90% of the theoretical value, and the esterified carboxyl value is 420mol / t), obtain the second intermediate product system;

[0053] The second intermediate product system, 30g catalyst (tetraethyl titanate and tetraisopropyl titanate compounded according to the mass ratio of 4:1) and 30g stabilizer (dibutyl phosphite and...

Embodiment 2

[0055] Mix 1kg terephthalic acid and 3kg 1,4-butanediol, heat to 200°C, stir evenly, mix with 30g nucleating agent (β-cyclodextrin), and carry out negative pressure esterification dehydration at 180°C React for 3 hours (at this time, the water yield reaches 85% of the theoretical value, and the esterified carboxyl value is 623mol / t), and the first intermediate product system is obtained;

[0056] The first intermediate product system was mixed with 1 kg of adipic acid under stirring conditions, and a negative pressure esterification dehydration reaction was carried out at 240° C. for 2 hours (at this time, the water yield reached 91% of the theoretical value, and the value of the esterified carboxyl group was 412mol / t), obtain the second intermediate product system;

[0057] The second intermediate product system 30g catalyst (tetraethyl titanate and tetraisopropyl titanate compounded according to the mass ratio of 4:1) and 30g stabilizer (dibutyl phosphite and dibutyl phospha...

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Abstract

The invention relates to the technical field of polymer synthesis, in particular to a preparation method and application of a fully biodegradable resin with excellent hydrolysis resistance. The main application field is agricultural covering film. According to the records of the examples, the fully biodegradable resin prepared by adding a nucleating agent in the preparation process of the present invention has a minimum hydrolysis rate of 30% in 24 hours (the fully biodegradable resin without adding a nucleating agent 98%), the lowest hydrolysis rate reached 56% in 48h (the full biodegradable resin without nucleating agent was 200%), and the lowest hydrolysis rate reached 102% in 72h (the full biodegradable resin without nucleating agent was 350%) , the hydrolysis resistance of the fully biodegradable resin is improved.

Description

technical field [0001] The invention relates to the technical field of polymer synthesis, in particular to a preparation method and application of a fully biodegradable resin with excellent hydrolysis resistance. Background technique [0002] At present, mulch film has been widely used in the agricultural fields of various countries, and has attracted much attention for its unique functions of heat preservation, moisture retention, entropy preservation, fertilizer increase, and production increase. In my country, the annual usage of mulch film exceeds 1 million tons, and the materials of these mulch films are basically traditional petroleum-based materials such as PE. These materials will be left in the soil after use and discarded, causing serious white pollution. The use of fully biodegradable materials as mulch is an effective way to solve the problem of "white pollution" in farmland, and has broad market prospects. [0003] Aliphatic polyesters have good biodegradabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/16C08G63/78C08K3/22C08K5/053C08L67/02C08L5/16C08J5/18
CPCC08G63/16C08G63/183C08G63/78C08G2230/00C08J5/18C08J2367/02C08J2405/16C08K3/22C08K5/053C08K2003/2241
Inventor 张志峰丁建萍陈汐江清明宿鹏董泽娟
Owner 新疆蓝山屯河高端新材料工程技术研究中心有限公司