Degradable ternary poly-beta-hydroxy butyrate and its prepn

The present invention is characterized by that 70-92% of poly(beta-hydroxybutyrate), 4-20% of polyethylene glycol oxide, 3.5-20% of cellulose ester and 0.5-2% of adjuvant are uniformly mixed, placed into mould with 60-90 deg.C, then placed in an oil press, and the mould is heated to 160-195 deg.C to...

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Bibliographic Details
Main Authors SHIHU MA, LIGUANG ZHANG, GUOXIANG CHENG
Format Patent
LanguageEnglish
Published 23.10.2002
Edition7
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:The present invention is characterized by that 70-92% of poly(beta-hydroxybutyrate), 4-20% of polyethylene glycol oxide, 3.5-20% of cellulose ester and 0.5-2% of adjuvant are uniformly mixed, placed into mould with 60-90 deg.C, then placed in an oil press, and the mould is heated to 160-195 deg.C to make hot-press formation, its pressure is 7-12 MPa, and the time is 20-40 min., then and mould is cooled to below 60 deg.C and demoulded so as to obtain the invented poly(beta-hydroxybutyrate) three-component blend. The melting temp. of said three-component blend is reduced, its toughness is improved and its complete degradability is also retained.
Bibliography:Application Number: CN2002116351