Hydrophobic degradable biological material, its production and foaming products

A biodegradable material and hydrophobic technology, applied in the field of foaming products, can solve the problems of poor plasticity, poor water resistance, and inability to perform foam molding, etc., and achieve the effect of good foaming ratio and excellent water resistance

Inactive Publication Date: 2007-04-04
李小鲁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to overcome the shortcomings of existing biodegradable materials containing polyvinyl alcohol, such as poor plasticity, poor water resistance, and inability to perform foam molding, and provide a kind of plastic material with good plasticity, good water resistance, and capable of foam molding. Preparation of hydrophobic biodegradable materials for foamed products

Method used

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  • Hydrophobic degradable biological material, its production and foaming products

Examples

Experimental program
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Effect test

preparation example Construction

[0030] The preparation method of the biodegradable material provided by the present invention comprises heating and melting the mixture containing polyalcohol and water-containing polyvinyl alcohol, containing or not containing starch, extruding and granulating to obtain the main material, and then mixing the main material with a foaming agent, The polyvinyl alcohol is hydrophobic polyvinyl alcohol.

[0031] The preparation method of the water-containing polyvinyl alcohol of the present invention comprises fully contacting water and the polyvinyl alcohol under stirring conditions, mixing uniformly, and swelling to obtain the water-containing polyvinyl alcohol. The purpose of fully contacting water and polyvinyl alcohol is to expand the intricately intertwined polyvinyl alcohol molecular chains to the greatest extent through water, thereby achieving the purpose of reducing the melting temperature of polyvinyl alcohol. In order to fully swell the polyvinyl alcohol, the weight ra...

Embodiment 1

[0045] This example is used to illustrate the hydrophobic biodegradable material provided by the present invention and its preparation method.

[0046] (1) Add water to 1.5 times the weight of polyvinyl alcohol (the degree of alcoholysis is 96%, and the average degree of polymerization is 1700) at a stirring speed of 500 rev / min, the system is heated and maintained at 105°C, and stirred for 15 After a few minutes, aqueous polyvinyl alcohol was obtained. Wherein in the obtained water-containing polyvinyl alcohol, the weight ratio of polyvinyl alcohol to water is 2.3. When the temperature of the system is lowered to 30°C, mix 55 parts by weight of the water-containing polyvinyl alcohol obtained above with 15 parts by weight of glycerin, 15 parts by weight of sorbitol and 3 parts by weight of methyl cellulose, and stir at a low speed of 100 rpm for about 7 minutes, then with 200 rev / min high-speed stirring for 8 minutes, after stirring evenly, place it for 4 hours; then add 6 pa...

Embodiment 2

[0050] This example is used to illustrate the hydrophobic biodegradable material provided by the present invention and its preparation method.

[0051] (1) Add water to 2.5 times the weight of polyvinyl alcohol (the degree of alcoholysis is 99%, the average degree of polymerization is 2600) at a stirring speed of 400 rpm, the system is heated and maintained at 90°C, and stirred for 28 After a few minutes, aqueous polyvinyl alcohol was obtained. Wherein in the obtained water-containing polyvinyl alcohol, the weight ratio of polyvinyl alcohol to water is 3.1. When the temperature of the system is lowered to 35°C, mix 27 parts by weight of the water-containing polyvinyl alcohol obtained above, 50 parts by weight of starch with 15 parts by weight of glycerin, 3 parts by weight of epoxy soybean oil, and 5 parts by weight of borax. Stir at a low speed for about 7 minutes, then stir at a high speed at 200 rpm for 8 minutes, and stir evenly to obtain a mixture.

[0052] (2) The mixt...

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Abstract

A degradable hydrophobic biological material, its production and foaming product are disclosed. The mixture consists of polybasic alcohol and aqueous hydrophobic vinol or starch. The melt temperature of degradable hydrophobic biological material is between 130-180 degree, carbonization temperature is between 195-300 degree, melt temperature is < carbonization temperature. It has excellent water-proofing and biological degradable performances and foaming rate and compression strength.

Description

technical field [0001] The present invention relates to a hydrophobic biodegradable material, its preparation method and foamed products, in particular to a hydrophobic fully biodegradable material, its preparation method and foamed products containing the material. Background technique [0002] CN 1405230A discloses a water-soluble, non-polluting and fully biodegradable plastic molding material in a short period of time, which contains polyvinyl alcohol, glycerol, diethylene glycol, sorbitol, fiber, white carbon black , superfine calcium, modified starch. CN1405230A also discloses the preparation method of the material: add 1-30 parts of glycerol to the polyvinyl alcohol raw material, stir at high temperature, make it fully wet, and then add an appropriate amount of auxiliary plasticizer, crosslinking agent, Reinforcing agents, modifiers, fillers, etc.; then, blending and reacting at a temperature of 25-65°C for 5-50 minutes, and then adding the obtained materials into a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08K5/3492C08J9/04
CPCC08L3/02C08J2303/02C08J2403/02C08J9/125C08L3/00C08K5/053C08K5/09C08J2429/04C08J2467/00C08J2469/00C08J9/0023C08L29/04C08L2205/03C08L69/00C08J2203/04C08J9/0061C08J2329/04C08L67/04C08L2666/02C08L2666/26C08L2666/18
Inventor 李小鲁
Owner 李小鲁
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