A kind of bio-based fully degradable plastic masterbatch, its preparation method and application

A plastic masterbatch, fully degradable technology, applied in the field of starch masterbatch, can solve the problems of high manufacturing cost, achieve the effects of improving compatibility, reducing production and processing costs, and overcoming incomplete degradation

Active Publication Date: 2019-12-20
四川妙顺环保科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of starch added in starch-filled plastics is generally about 30%, and the manufacturing cost is relatively high
Moreover, the starch masterbatch is mixed with plastic, and its degradability needs to be further improved

Method used

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Examples

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Effect test

preparation example Construction

[0034] Correspondingly, the present invention provides a kind of preparation method of bio-based fully degradable plastic masterbatch, comprising the following steps:

[0035] A) Mix the matrix resin, oxidative degradation additive and biodegradation aid, and then add hydrophobic modified starch to obtain a mixture; the mass ratio of the hydrophobic modified starch to the matrix resin is (60-80): (20 ~40); The quality of described oxidative degradation additive accounts for 1~20% of the total mass of hydrophobic modified starch and matrix resin; The quality of described biodegradation aid accounts for 1~20% of the total mass of hydrophobic modified starch and matrix resin 10%;

[0036] B) extruding and granulating the mixture to obtain a bio-based fully degradable plastic masterbatch.

[0037] In the present invention, the contents of the matrix resin, oxidative degradation additive, biodegradation aid, and hydrophobic modified starch are the same as those described above, an...

Embodiment 1

[0046] (1) Preparation of modified starch: according to the mass ratio, corn starch (Jinan Hongxu Chemical Co., Ltd., food grade, water content ≤ 14%) 93%, calcium stearate 3%, tetrabutyl titanate 3% Add 1% of oleic acid into a high-speed mixer, stir and react at 130° C. for 20 minutes to obtain hydrophobic modified corn starch with a hydroxyl substitution degree of 33%.

[0047] (2) Mixing materials: polyethylene resin (Qilu Petrochemical LLDPE 7042) with a mass fraction of 35% and oxidative degradation additive EBP-1203 (Shandong Tianzhuang Environmental Protection Technology Co., Ltd.), citric acid (Zhengzhou Jinhao Chemical Products Co., Ltd.) in In a high-speed blender, after mixing at 40°C for 10 minutes, add 65% of the above-mentioned modified corn starch and continue mixing for 10 minutes to obtain a mixture. Wherein, the mass of the oxidative degradation additive accounts for 5% of the total mass of the plastic base material and the modified starch; the mass of citric...

Embodiment 2

[0052] (1) Preparation of modified starch: According to the mass ratio, 93% of potato starch (Jinan Qing'an Chemical Co., Ltd., food grade, moisture content ≤ 18%), 3% of calcium stearate, and 3% of tetrabutyl titanate Add 1% lauric acid into a high-speed mixer, and stir and react at 160° C. for 15 minutes to obtain a hydrophobic modified potato starch with a hydroxyl substitution degree of 31%.

[0053] (2) Mixing: Polyethylene resin (Qilu Petrochemical LLDPE 7042) with a mass fraction of 20%, and oxidative degradation additive EBP-1205 (Shandong Tianzhuang Environmental Protection Technology Co., Ltd.) and malic acid (Henan Zhongjie Chemical Products Co., Ltd.) In a high-speed mixer, after mixing at 50°C for 20 minutes, add 80% of the above-mentioned modified potato starch and continue mixing for 20 minutes to obtain a mixture. Wherein, the mass of the oxidative degradation additive accounts for 10% of the total mass of the plastic base material and the modified starch; the ...

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Abstract

The invention provides bio-based fully-degradable plastic masterbatch as well as a preparation method and application thereof. The bio-based fully-degradable plastic masterbatch is prepared by carrying out extrusion and granulation on a mixed material; the mixed material is prepared from hydrophobic modified starch, matrix resin, an oxidative degradation additive and a biodegradable auxiliary, wherein the mass ratio of the hydrophobic modified starch to the matrix resin is (60 to 80) to (20 to 40), the mass of the oxidative degradation additive accounts for 1 to 20 percent of the total mass of the hydrophobic modified starch and the matrix resin, and the mass of the biodegradable auxiliary accounts for 1 to 10 percent of the total mass of the hydrophobic modified starch and the matrix resin. The modified starch of the plastic masterbatch disclosed by the invention has obvious hydrophobicity, and the compatibility of the starch and plastic polymer requiring degradation can be improved, so that the content of biomass carbon in the plastic to be degraded is increased, and the production processing cost is effectively reduced. The oxidative degradation additive and the biodegradable auxiliary are added in the bio-based masterbatch disclosed by the invention, so that the bio-based masterbatch has multiple degradation effects, the effects of the bio-based masterbatch are superior to the effects of existing starch masterbatch, and the application is wide.

Description

technical field [0001] The invention relates to the technical field of starch masterbatch, in particular to a bio-based fully degradable plastic masterbatch, its preparation method and application. Background technique [0002] With the continuous increase of plastic consumption, waste plastics are also increasing, especially the use of plastic products such as mulch film and disposable lunch boxes has caused serious pollution to the environment. In order to solve the problem of environmental pollution caused by plastic waste, biodegradable plastics have been extensively studied. In terms of degradation mechanism, currently researched biodegradable plastics are mainly divided into fully biodegradable plastics and incompletely biodegradable plastics. Fully biodegradable plastics are polymer materials that eventually decompose into inorganic substances such as water and carbon dioxide. However, such degradable plastics have problems such as processing difficulties, poor water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L3/04C08L23/06C08K13/02C08K3/22C08K5/098C08K3/28C08K5/092C08J3/22A01G13/02
CPCA01G9/1438A01G13/0275C08J3/226C08J5/18C08J2323/08C08J2403/04C08J2423/08C08K2003/2241C08K2003/2296C08K2201/011C08K2201/014C08L23/0815C08L2201/06C08L2203/16C08L2205/025C08L2205/03C08L3/04C08K13/02C08K3/22C08K5/098C08K3/28C08K5/092
Inventor 李顺华
Owner 四川妙顺环保科技集团有限公司
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