Heat-proof polylactic acid-starch alloy system full-biodegradation material and preparation thereof

A technology for degrading materials and polylactic acid, which is applied in the field of fully biodegradable materials and their preparation, temperature-resistant polylactic acid-starch alloy system fully biodegradable materials and their preparation fields, can solve the problem that polylactic acid does not have high temperature resistance, does not have the Completely biodegradable, not easy to recycle and reuse, etc., to achieve the effect of smooth and delicate appearance, low cost and good cost performance

Active Publication Date: 2009-01-14
丹阳市华东工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material uses polyvinyl alcohol (or carbon dioxide polymer) and elastomer (POE) as raw materials, which are petroleum derivatives or products that have not been industrialized, and are not completely biodegradable, and are not easy to recycle. Utilization will cause secondary pollution to the environment, and at the same time, it does not solve the important defect of polylactic acid-the problem of high temperature resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Raw material ratio: polylactic acid resin 50%, grafted modified starch 15%, 400 mesh natural hemp fiber powder 10%, ultrafine nucleating agent 2500 mesh refined titanium dioxide 8%, reversible crosslinking agent aluminum triacetylacetonate 2%, Aliphatic chain extender: 2% of ADR-4370 chain extender produced by BASF, 2% of aluminate coupling agent, 2% of plasticizer glycerin, 2% of carboxyl compatibilizer, and 2500% of anti-creep inorganic powder 7% superfine zinc oxide, wherein the polylactic acid resin is an industrial grade polylactic acid resin with a melt index of 5g / 10min, and the grafted modified starch is a graft material obtained by reacting maleic anhydride and an equivalent amount of starch with a peroxide. The carboxyl compatibilizer is an ethylene-acrylic acid oligomer with acrylic acid monomer unit content of 15%.

[0018] Preparation:

[0019] (A) Starch modification: put the grafted modified starch and natural hemp fiber powder in a high-temperature mixe...

Embodiment 2

[0023] Raw material ratio: polylactic acid resin 70%, grafted modified starch 10%, 500 mesh natural hemp fiber powder 5%, superfine nucleating agent 3000 mesh high-purity talc powder 5%, reversible crosslinking agent aluminum triacetylacetonate 1 %, aliphatic chain extender: 1% of ADR-4370 chain extender produced by BASF, 1% of titanate coupling agent, 1% of plasticizer sorbitol, 1% of carboxyl compatibilizer, anti-creep inorganic powder The body is 2500 mesh superfine barium sulfate 5%, wherein the polylactic acid resin is an industrial grade polylactic acid resin with a melt index of 8g / 10min, and the grafted modified starch is obtained by reacting maleic anhydride and an equivalent amount of starch with peroxide. Branch material, carboxyl compatibilizer is ethylene-acrylic acid oligomer with 20% acrylic acid monomer unit content.

[0024] Preparation:

[0025] (A) Starch modification: Put the grafted modified starch and natural hemp fiber powder in a high-temperature mixer...

Embodiment 3

[0029]Raw material ratio: polylactic acid resin 60%, grafted modified starch 14%, 200 mesh natural hemp fiber powder 10%, superfine nucleating agent 2000 mesh refined titanium dioxide 5%, reversible crosslinking agent aluminum glycinate 2%, aliphatic Chain extender: 1% of ADR-4370 chain extender produced by BASF, 1% of aluminate coupling agent, 1% of plasticizer glycerin, 1% of carboxyl compatibilizer, 2500 mesh super Fine zinc oxide 5%, wherein the polylactic acid resin is an industrial grade polylactic acid resin with a melt index of 10g / 10min, and the grafted modified starch is a graft material obtained by reacting maleic anhydride and an equivalent amount of starch with a peroxide, and the carboxyl phase The compatibilizer is ethylene-acrylic acid oligomer with acrylic acid monomer unit content of 12%.

[0030] Preparation:

[0031] (A) Starch modification: Put the grafted modified starch and natural hemp fiber powder in a high-temperature mixer and dry them at a low spee...

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Abstract

The invention discloses temperature resistance type polylactic acid-starch alloy system whole biodegradable material and the preparation method. The temperature resistance performance of the polylactic acid can be raised above 85 DEG C by adopting the temperature resistance type polylactic acid-starch alloy system whole biodegradable material, simultaneously, fully plastic material is presented when the temperature is above 120 DEG C, the temperature resistance type polylactic acid-starch alloy system whole biodegradable material has the processing property and the practical performance of common plastics, and the applicable range of the polylactic acid is enlarged. The temperature resistance type polylactic acid-starch alloy system whole biodegradable material is made of the raw materials according to the percentage by weight: polylactic resin accounting for 50 percent to 70 percent, grafting modified starch accounting for 10 percent to 20 percent, natural hemp fiber powder accounting for 5 percent to 20 percent, superfine nucleating agent accounting for 5 percent to 20 percent, reversible cross-linking agent accounting for 1 percent to 5 percent, aliphatic chain-extending agent accounting for 1 percent to 5 percent, coupling agent accounting for 1 percent to 5 percent, plasticizer accounting for 1 percent to 5 percent, carboxy compatilizer accounting for 1 percent to 5 percent and creep resistant inorganic powder accounting for 5 percent to 20 percent.

Description

technical field [0001] The invention relates to a fully biodegradable material and a preparation method thereof, more specifically to a temperature-resistant polylactic acid-starch alloy system fully biodegradable material and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] As human beings pay more and more attention to sustainable development and its related environmental and resource issues, research and development of environmentally friendly plastic materials using recycled resources, that is, biomass plastics, has become a research hotspot. Among the fully biodegradable materials that have been developed, polylactic acid and starch derived from natural resources are particularly attractive due to their own advantages. Polylactic acid is a new type of linear aliphatic polyester, which is a fermentation derivative of starch. Renewable resources, there are large-scale industrial products at home and abroad, which hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/02C08L1/02C08K13/02C08K3/34C08K3/22C08K3/36C08K5/07C08K5/17B29B7/00B29B9/06
Inventor 刘永忠朱华平陆川军朱金平
Owner 丹阳市华东工程塑料有限公司
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