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公开(公告)号：US5631346A
公开(公告)日：1997-05-20
申请号：US545115
申请日：1995-10-19
申请人： Andreas Deckers , Albin Berger , J urgen Hofmann , Roger Klimesch , Karl-Peter Farwerck , Hilmar Ohlig
发明人： Andreas Deckers , Albin Berger , J urgen Hofmann , Roger Klimesch , Karl-Peter Farwerck , Hilmar Ohlig
IPC分类号： A61K8/31 , A61Q19/00 , B29B15/00 , C08F8/50 , C08F10/06 , C08F110/06 , C08J11/12 , C09D7/12 , C09D11/12 , C09D191/08 , C08F6/04
CPC分类号： A61K8/31 , A61Q19/00 , C08F8/50 , C08F110/06 , C08F2810/10
摘要： Polyolefins are thermomechanically degraded in a twin-screw extruder without a downstream degradation apparatus, at from 300.degree. to 550.degree. C. and from 1 to 100 bar and in average residence times of the reaction mixture of from 0.5 to 10 minutes, by a process in which the pressure in the twin-screw extruder is changed periodically or aperiodically with a fluctuation of from 0.5 to 30 bar. The novel process is particularly suitable for the degradation of polypropylene.
摘要翻译： 聚烯烃在不具有下游降解装置的双螺杆挤出机中在300至550℃和1至100巴之间以及0.5至10分钟的反应混合物的平均停留时间通过一种方法进行热机械降解 其中双螺杆挤出机中的压力周期性地或不定期地以0.5至30巴的波动改变。 该新方法特别适用于聚丙烯的降解。
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公开(公告)号：US5595696A
公开(公告)日：1997-01-21
申请号：US457380
申请日：1995-06-01
CPC分类号： B29B9/06 , C08J5/04 , C08K7/02 , Y10S264/53 , Y10T428/2927 , Y10T428/2938
摘要： In a fiber composite plastic composed of plastic composition and fibers, the fibers have a pronounced fiber length distribution, in particular more than 50% by weight of the fibers have a length outside the range from 0.8.times.L to 1.2.times.L, where L is the mean (weight average) fiber length, and the mean fiber length is greater than the critical fiber length of the plastic composition/fiber system.
摘要翻译： 在由塑料组合物和纤维组成的纤维复合塑料中，纤维具有显着的纤维长度分布，特别是大于50重量％的纤维的长度在0.8xL至1.2xL的范围之外，其中L是平均值 （重量平均）纤维长度，平均纤维长度大于塑料组合物/纤维体系的临界纤维长度。
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