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Biodegradable starch-containing high polymer composition and preparation thereof

A biodegradable and macromolecular technology, applied in the field of biodegradable starch-containing macromolecular compositions and their preparation, can solve problems such as poor strength and achieve the effect of high coloring rate

Active Publication Date: 2012-09-05
南京艾道博环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the disadvantages of the prior art that the starch content of biodegradable plastics is high and the strength is poor, the present invention provides a biodegradable starch-containing polymer composition and a preparation method thereof. performance biodegradable plastic

Method used

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  • Biodegradable starch-containing high polymer composition and preparation thereof
  • Biodegradable starch-containing high polymer composition and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1 (Note: the example must be a specific point, not a range, please modify)

[0064] A biodegradable starch-containing polymer composition, in parts by mass, consists of:

[0065] 45 parts starch with a water content of 13%wt and a fineness of 200 mesh;

[0066] 20 parts of low-density polyethylene and linear low-density polyethylene are mixed in a ratio of 4:1 in mass ratio;

[0067] 18 parts of ethylene-acrylic acid copolymers with acrylic acid content of 20%wt;

[0068] 0.3-0.8 part calcium stearate,

[0069] 12 parts are selected from any one of ethylene glycol, propylene glycol, glycerol, and sorbitol;

[0070] 0.1-0.5 part stearic acid,

[0071] 1.0-1.8 parts Glyceryl monostearate, density: 0.916g / cm 3

[0072] 12 parts Glycerin, saponification grade purity 99.5% wt, boiling point > 250°C or vegetable oil is also acceptable.

[0073] Described starch is any one in corn starch, wheat starch, tapioca starch, sweet potato starch, potato starch.

[0074...

Embodiment 2

[0082] A biodegradable starch-containing polymer composition, in parts by mass, consists of:

[0083] 42 parts cornstarch with a moisture content of 13%wt and a fineness of 100 mesh;

[0084] 25 parts of low-density polyethylene and linear low-density polyethylene are mixed in a ratio of 3:2 in mass ratio;

[0085] 14 parts of ethylene-acrylic acid copolymer with acrylic acid content of 5-25%;

[0086] 0.4 part calcium stearate,

[0087] 10 parts are selected from any one of ethylene glycol, propylene glycol, glycerol, and sorbitol;

[0088] 0.2 part stearic acid,

[0089] 1.4 parts glyceryl monostearate

[0090] 15 parts Glycerin, saponification grade purity 99.5%wt, boiling point > 250°C or vegetable oil can also be used.

[0091] Above-mentioned starch resin can directly use film blowing machine (upper, middle, lower blowing) or casting, calendering and vacuum blow molding, and its performance parameters are as follows:

[0092] Resin: MI: <2g / 10min 190℃ 2.16kg

[00...

Embodiment 3

[0101] A biodegradable starch-containing polymer composition, in parts by mass, consists of:

[0102] 35 parts Wheat starch with a water content of 12%wt and a fineness of 200 mesh;

[0103] 30 parts of low-density polyethylene and linear low-density polyethylene are mixed in a ratio of 4:1 in mass ratio;

[0104] 10 parts of ethylene-acrylic acid copolymer with acrylic acid content of 25%wt;

[0105] 0.8 part calcium stearate,

[0106] 12 parts of ethylene glycol;

[0107] 0.5 part stearic acid,

[0108] 1.0 parts glyceryl monostearate, density: 0.916g / cm3

[0109] 12 parts soybean oil.

[0110] Described low-density polyethylene is 190 ℃, when 2.16kg, melting index is 5g / 10min, and density is 0.918g / m 3 , molecular weight > 200,000, molecular weight distribution is 1.3; linear low density polyethylene is 190°C, when 2.16kg, the melt index is 3g / 10min, and the density is 0.920g / m 3 .

[0111] During production, all raw materials are mixed evenly according to the formu...

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Abstract

The invention discloses a biodegradable starch-containing high polymer composition. The composition consists of the following raw materials in parts by mass: 35-45 parts of starch, 20-30 parts of mixture of low-density polyethylene and linear low-density polyethylene, 10-18 parts of ethylene-acrylic acid copolymer, 0.3-0.8 part of calcium stearate, 8-12 parts of polyalcohol, 0.1-0.5 part of stearic acid, 1.0-1.8 parts of glycerin monostearate and 12-18 parts of glycerol or plant oil. A preparation method of the biodegradable starch-containing high polymer composition comprises the following steps of: uniformly mixing the raw materials according to a certain proportion for pre-gelatinization; heating and undergoing a gelatinization reaction at the temperature between 175 DEG C and 180 DEG C under the pressure of -0.08 MPa, fully extracting gas produced by the reaction, shearing a gelatinized material in vacuum and enclosed state at the temperature of 180 DEG C at the screw rod rotatingspeed of 350 r / min, and mixing to complete a graft reaction; and melting and pelletizing. The preparation method is particularly suitable for preparing agricultural and ground films with the thicknesses of over 0.015 millimeter or one-off articles, and has high mechanical property and high biodegradability.

Description

technical field [0001] The invention relates to a biodegradable starch-containing polymer composition and a production method thereof, and mainly relates to a biodegradable starch-containing polymer composition which can be used for preparing disposable articles and agricultural and mulch films. Background technique [0002] The development of naturally degradable plastic products to replace commonly used ordinary plastic products has become a hot spot in the 1990s, but the development of degradable plastics was slow due to cost and technical problems. In recent years, with the advancement of raw material production and product processing technology, degradable plastics, especially biodegradable plastics, have received renewed attention and become the highlight of sustainable and circular economic development. At the same time, they have once again become a hot spot in the world. The development of degradable plastics is necessary and meaningful, whether it is from energy su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L23/06C08L23/08C08K5/098C08K5/053C08K5/09C08K5/103B29B9/06
Inventor 彭晓峰常军
Owner 南京艾道博环保科技有限公司