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1.
公开(公告)号:US4950720A
公开(公告)日:1990-08-21
申请号:US188260
申请日:1988-04-29
IPC分类号: C08F10/06 , C08F2/00 , C08F8/00 , C08F210/06 , C08F297/08 , C08L23/12 , C08L23/16
CPC分类号: C08L23/12 , C08F210/06 , C08F297/08 , C08L23/16
摘要: A modified polypropylene having a substantially isotactic homopolypropylene and a propylene/olefin random copolymer, the modified polypropylene including up to about 50 chain disruptors per 1000 propylene repeat units. The chain disruptors are racemic polypropylene diads and olefin, the olefin being incorporated into the high end of the molecular weight distribution of the modified polypropylene.
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公开(公告)号:US5066723A
公开(公告)日:1991-11-19
申请号:US632179
申请日:1990-12-21
IPC分类号: C08F8/50
CPC分类号: C08L23/10 , C08F8/50 , B29B9/06 , B29B9/16 , C08F2800/10 , C08F2810/10
摘要: Impact-modified polymeric materials are produced by visbreaking certain reactor blends. In a preferred embodiment, impact-modified polypropylene materials are produced by visbreaking a reactor blend of polypropylene and thermoplastic polyethylene. The polypropylene material is preferably homopolypropylene having a melt flow rate of less than about 1 dg/min. Such impact-modified polymeric materials manifest unexpected compatibility characteristics, increased impact resistance at low temperatures, improved antiblush characteristics and improved flow characteristics.
摘要翻译: 冲击改性的聚合物材料通过减粘裂化某些反应器共混物来制备。 在优选的实施方案中,冲击改性的聚丙烯材料通过减粘裂化聚丙烯和热塑性聚乙烯的反应器共混物来制备。 聚丙烯材料优选为熔体流动速率小于约1dg / min的均聚丙烯。 这种冲击改性的聚合材料表现出意想不到的相容特性,在低温下增加的耐冲击性,改进的抗冲击特性和改善的流动特性。
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