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Total-starch type biodegradable plastic

A technology for biodegradable plastics and all-starch, applied in the field of completely degradable plastics, can solve the problems of unsatisfactory comprehensive use performance of all-starch plastics, lack of thermoplastic properties, strength and stretch, and inability to be processed with plastic products, etc. Achieve good thermoplastic processing performance, low price and reduced production cost

Inactive Publication Date: 2004-11-17
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication Nos. CN1255508A and CN1137439A are the so-called all-starch plastics reported in Chinese patent documents, which are made of starch and biological glue through steps such as stirring and hot-pressing. They have no thermoplastic performance, insufficient strength and stretching and can only be used for manufacturing. The material of thick products such as lunch boxes cannot be used for the processing of other plastic products, especially the processing of thin products such as films, bags, etc., and the degradation effect is not as good as expected. The comprehensive performance of these all-starch plastics cannot make People are satisfied, so far it has not been promoted and applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The amount of raw materials and parts by weight:

[0031] 90 parts of dialdehyde starch with an oxidation degree of 40% to 60%,

[0032] 3.0 parts of dodecenyl succinic anhydride,

[0033] DCP (initiator) 0.2 parts,

[0034] 5.0 parts of dibutyl adipate,

[0035] 2.0 parts of 1,4-butanediol bis(β-aminobutenoic acid) ester,

[0036] 2.0 parts of liquid paraffin,

[0037] PCL 3.0 copies.

[0038] The dialdehyde starch in the raw material can be prepared with reference to the method of "Process for oxidation of starch" of patent GB943664.

[0039] According to the conventional method of plastic processing, the PCL and dibutyl adipate in the raw materials are stirred and melted at a high speed at a temperature of 150℃-180℃. Add the initiator DCP, modifier dodecenyl succinic anhydride, stabilizer 1,4-butanediol bis(β-aminobutenoic acid) ester and lubricant liquid paraffin just before the melting is completed to make the material completely melt And mix well. Then the dialdehyde ...

Embodiment 2

[0044] Dosage of components and parts by weight:

[0045] 95 parts of dialdehyde starch (same as Example 1),

[0046] 2.0 parts of maleic anhydride,

[0047] 0.6 copies of BPO,

[0048] 4.0 parts of bis(2-ethylhexyl) adipate (DOA),

[0049] 3.0 parts of sorbitol,

[0050] 1.0 part of polyethylene wax,

[0051] 5.0 copies of PGA.

[0052] Operate according to the same feeding method and conditions as in Example 1, to obtain the corresponding full starch biodegradable plastic resin.

Embodiment 3

[0054] Dosage of components and parts by weight:

[0055] Dialdehyde starch (same as Example 1) 92 parts,

[0056] 1.0 part of octadecenoic acid,

[0057] DCP / BPO(1∶1) 1.0 copies,

[0058] Glycerin / ethylene glycol (1∶1) 2.0 parts,

[0059] 1.5 parts of pentaerythritol,

[0060] 1.5 parts of stearic acid,

[0061] PVA / plant fiber (1:1) 6.0 parts.

[0062] Operate according to the same feeding method and conditions as in Example 1, to obtain the corresponding full starch biodegradable plastic resin.

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Abstract

A total-starch type biodegradable plastic by using dialdehyde starch whose oxidization degree is no less than 40% as the fundamental and principal raw material, through blended refining with long chain non-saturated carboxylic acid or acid anhydrides grafted and modified compositions, degradable aliphatic polyester or hydroxy acid blending component, organic peroxides initiating agent, polyhydric alcohol esters plasticizing agent, polyhydric alcohols and / or their esters compound stabilizing agent, higher hydrocarbons, aliphatic acids and their esters or polyamides compound lubricating agent.

Description

Technical field [0001] The invention relates to a full starch biodegradable plastic with a starch content of more than 80%, in particular to a completely degradable plastic based on dialdehyde starch with an oxidation degree of ≥40%. Background technique [0002] Plastic has become the most widely used material in the world, and various plastic products have been widely involved in various fields of social production and life, occupying an important position. To solve the two major problems of limited resources and serious environmental pollution in the development of the plastic industry, the development and application of degradable plastics are proposed. The degradable plastics that have been reported and put into use are mainly starch plastics. There have been reports of starch plastics, mainly filled starch plastics and starch-based plastics. The starch content in their products is low (10-30%), and the remaining main components are still polymer components that are difficul...

Claims

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Application Information

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IPC IPC(8): C08K5/10C08L51/02
Inventor 陈庆郭林杨欣宇陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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