Title:
A METHOD FOR PRODUCING BIOLOGICALLY DEGRADABLE RESIN
Document Type and Number:
WIPO Patent Application WO/2003/042294
Kind Code:
A1
Abstract:
The present invention relates to a process for producing biologically degradable resin. Said process comprises following steps: the mixture of starch and white oil or solvent oil is dehidrated in a dehidration vessel to obtain a product that has a water content lower than 0.5?0¿/¿00?; the dehidrated product is pulverized in a sand mill to a average particulate size lower than 10µm; the pulverized product is centrifugalized to obtain the filter cake of starch; the centrifugalized starch is modified with 0.5-5% of coupling agent and 0.5-7.5% of lubricant; the modified starch is mixed with 25-80% of thermoplastic resin, 1-10% of plasticizer, 0.5-7.5% of lubricant and 1-15% of degradation promoting agent for 10-30 minutes; the resultant mixture is pelletized in a twin screw extruder or pugging extruder at a temperature range of 100-290°C.
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Inventors:
LIU JIAFAN
QUAN SHIPU
QUAN SHIPU
Application Number:
PCT/CN2002/000271
Publication Date:
May 22, 2003
Filing Date:
April 19, 2002
Export Citation:
Assignee:
TIANJIN DANHAI CO LTD (CN)
International Classes:
C08J3/12; B29B9/06; C08K5/00; C08L3/00; C08L3/02; C08L23/02; C08L101/00; C08L101/16; (IPC1-7): C08L3/00; C08L23/00
Foreign References:
| CN1232834A | 1999-10-27 | |||
| CN1280146A | 2001-01-17 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (2 Fuchengmenwai Street, Beijing 7, CN)
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