| 专利名称 | Blends of carbon dioxide-propylene oxide copolymer and poly (3-hydroxyalkanoate) and a method of making the same | 申请号 | US20020166136 | 专利类型 | US | 公开（公告）号 | US6576694 | 公开（授权）日 | 2003.06.10 | 申请（专利权）人 | 中国科学院长春应用化学研究所 | 发明（设计）人 | LIU JINGJIANG (CN); SUN CHUNRONG (CN) | 主分类号 | C08K5/09 | IPC主分类号 | C08K5/09;C08K3/38;C08K3/34 | 专利有效期 | Blends of carbon dioxide-propylene oxide copolymer and poly (3-hydroxyalkanoate) and a method of making the same 至Blends of carbon dioxide-propylene oxide copolymer and poly (3-hydroxyalkanoate) and a method of making the same | 法律状态 | 说明书摘要 | The present invention provides blends comprising 30-70 parts by weight of poly(3-hydroxyalkanoate) (PHA) resin, 70-30 parts by weight of higher molecular weight carbon dioxide-propylene oxide copolymers (PPC) with over 98% alternating copolymer structure, 1-10 parts by weight of talcum powder, 0.2-3 parts by weight of boron nitride, and 0.1-2 parts by weight antioxidant(s), where the sum of parts of PHA and PPC is 100 parts by weight. The present invention also provides for a method of preparing the blends, which may comprise the step of extrusion and pelletization in a conventional twin-screw extruder. The melt mass in the twin-screw extruder is kept in the range of 175 C.-185 C. The blends can be used in extrusion of plates and sheets, preparation of films and in injection molding. These fabricated articles possess biodegradable property, good mechanical properties, good printing property, good barrier property and sealing property |
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