Title:
A WATER SOLUBLE BIODEGRADABLE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2007/033595
Kind Code:
A1
Abstract:
A water soluble biodegradable material wherein said material is a product obtained by melting of a mixture, said mixture contains starch, polyol and aqueous polyvinyl alcohol, said polyvinyl alcohol is a kind of hydrophilic polyvinyl alcohol. The content of polyol is from 0.1 weight percent to less than 10 weight percent based on the total weight of the mixture. The water soluble biodegradable material provided by the invention has a melting temperature of 130 to 190 , a decomposition temperature of 250 to 400 , and the melting temperature is far less than the decomposition temperature, so that ture extrution pelletizing and injection moulding can be realized. A injection molded article produced with the water soluble biodegradable material of the invention has excellent simple beam impact strength, tensile yield strength, elongation at break, water solubility and biodegradability.
Inventors:
LI XIAOLU (CN)
Application Number:
PCT/CN2006/002471
Publication Date:
March 29, 2007
Filing Date:
September 21, 2006
Export Citation:
Assignee:
LI XIAOLU (CN)
International Classes:
C08L3/12; B29C48/40; C08K13/02; C08L29/04
Domestic Patent References:
| WO2000061660A1 | 2000-10-19 |
Foreign References:
| CN1048221A | 1991-01-02 | |||
| US5322866A | 1994-06-21 | |||
| CN1330683A | 2002-01-09 | |||
| JP2003105105A | 2003-04-09 |
Other References:
See also references of EP 1939247A4
Attorney, Agent or Firm:
RUNPING & PARTNERS (Yingu Mansion No. 9 Beisihuanxil, Haidian District Beijing 0, CN)
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