专利详情

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