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Biodegradable material and process for producing the same

A biodegradable material and biodegradable technology, applied in the field of production of the biodegradable material, can solve the problems of inability, deformation of the biodegradable material by heating, difficulty in maintaining the shape, etc.

Inactive Publication Date: 2006-11-29
SUMITOMO ELECTRIC FINE POLYMER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, polylactic acid has a fatal flaw: that is, polylactic acid is difficult to maintain its shape at low temperature
The problems thus arise are that the cross-linking efficiency is low, the biodegradable material is easily deformed by heating and the heat resistance is lowered
Hydrophobic substances cannot therefore be crosslinked by using conventional radiation used in the field of crosslinking
Furthermore, hydrophobic substances cannot be cross-linked by means of cross-linking agents such as aldehydes used in chemical treatments for cross-linking starch

Method used

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  • Biodegradable material and process for producing the same
  • Biodegradable material and process for producing the same
  • Biodegradable material and process for producing the same

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Embodiment Construction

[0043] In order to achieve the first object of enhancing the heat resistance of biodegradable materials, the present inventors conducted active research and found that this object can be achieved by mixing a monomer having an allyl group with a biodegradable aliphatic polyester and combining the The mixture is irradiated with radiation to cross-link the molecules with each other to meet predetermined conditions. In particular, the present inventors have found that the configuration-retaining performance of polylactic acid at high temperature (i.e., high hardness) can be improved by sufficiently crosslinking the non-crystalline part of polylactic acid with an allyl group-containing monomer, although polylactic acid Decayed by radiation, and is generally considered non-crosslinkable with common monomers.

[0044] Based on the above findings, the first invention provides a biodegradable material comprising not less than 95% by weight and not more than 99% by weight of a biodegrad...

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Abstract

A biodegradable aliphatic polyester, such as polylactic acid, is mixed with a monomer having allyl and molded into a molding having the crosslinking degree of the biodegradable aliphatic polyester increased. Thereafter, the molding is exposed to ionizing radiation to thereby obtain a molding excelling in heat resistance. Triallyl isocyanurate or triallyl cyanurate is used as the monomer having allyl.

Description

field of invention [0001] The present invention relates to a biodegradable material and a method for producing the biodegradable material. The present invention more particularly relates to biodegradable materials made of synthetic biodegradable polymer materials excellent in heat resistance, shape retention (i.e. high hardness), strength and moldability, and having a high heat resistance factor and A biodegradable material usable as a heat-shrinkable material, and a method for producing the biodegradable material. Background technique [0002] Many types of products such as films, containers, heat-shrinkable materials, etc. are formed by molding petroleum synthetic polymer materials. But a problem arises when waste is disposed of by burning it after use. That is, the following social problems have arisen: global warming due to heat and exhaust gases generated when products are burned; effects on food and bodies of toxic substances contained in combustion gases and residue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08B15/10C08B31/00C08B37/00C08J7/00C08L1/00C08L3/00C08L5/00C08L67/00C08B31/04C08J3/28C08L1/08C08L3/04C08L101/16
Inventor 长泽尚胤八木敏明吉井文男金泽进一川野清中谷吉弘三友宏志
Owner SUMITOMO ELECTRIC FINE POLYMER INC
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