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公开(公告)号:US20050075446A1
公开(公告)日:2005-04-07
申请号:US10998411
申请日:2004-11-29
CPC分类号: C08F8/50 , C08K5/0033 , C08K5/14 , C08L23/10 , C08L53/00
摘要: A process is provided for the production of a very low melt viscosity (high melt flow index) polymer resin, suitable for use in spunbond or meltblown processing. According to the process of the current invention, a high melt viscosity (low melt flow index) resin is subjected to post-reactor molecular weight alteration by extrusion with a chemical prodegradant. The process produces a very low melt viscosity resin that can be used in spunbond or meltblown processing without further treatment to reduce the average molecular weight of the resin. Further, the very low melt viscosity resins produced according to the process of the current invention contain very little or no residual prodegradant.
摘要翻译: 提供了一种生产适用于纺粘或熔喷处理的非常低熔体粘度(高熔体流动指数)聚合物树脂的方法。 根据本发明的方法,通过用化学降解剂进行挤出,使高熔体粘度(低熔体流动指数)树脂进行后反应器分子量改变。 该方法产生非常低的熔体粘度树脂,其可以用于纺粘或熔喷处理,而不需要进一步处理以降低树脂的平均分子量。 此外,根据本发明的方法生产的非常低的熔体粘度树脂含有很少或没有残留的降解剂。
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公开(公告)号:US20050255777A1
公开(公告)日:2005-11-17
申请号:US10844640
申请日:2004-05-12
申请人: Kimberly McLoughlin , Sehyun Kim
发明人: Kimberly McLoughlin , Sehyun Kim
IPC分类号: B32B5/26 , C08L23/12 , C08L23/14 , D04H3/00 , D04H3/16 , D04H1/00 , D04H1/54 , D04H1/56 , D04H3/14 , D04H5/00 , D04H5/06 , D04H13/00
CPC分类号: C08L23/12 , C08L23/14 , C08L2205/02 , Y10T428/2929 , Y10T442/60 , Y10T442/659 , Y10T442/66 , Y10T442/68 , Y10T442/681 , Y10T442/69 , C08L2666/06
摘要: The present invention provides polypropylene blends for use in the production of fibers and fabrics. The polypropylene blends according to the current invention comprise from about 85 to about 95 percent by weight of a propylene homopolymer and from about 5 to about 15 percent by weight of an ethylene/propylene random copolymer having an ethylene content of about 7 percent by weight or less. The overall ethylene content of the blends according to the present invention is about 1 percent by weight or less. Polypropylene blends according to the current invention provide lower bonding temperatures and wider bonding windows without the increased smoke generation associated with high solubles homopolymers.
摘要翻译: 本发明提供用于生产纤维和织物的聚丙烯共混物。 根据本发明的聚丙烯共混物包含约85至约95重量%的丙烯均聚物和约5至约15重量%的乙烯含量为约7重量%的乙烯/丙烯无规共聚物,或 减。 根据本发明的共混物的总乙烯含量为约1重量%或更少。 根据本发明的聚丙烯共混物提供较低的结合温度和更宽的粘合窗口,而不增加与高可溶性均聚物相关的烟雾产生。
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公开(公告)号:US20050075458A1
公开(公告)日:2005-04-07
申请号:US10953376
申请日:2004-09-29
CPC分类号: C08L23/12 , C08L23/142 , C08L23/16 , C08L2308/00 , C08L2666/06
摘要: A paintable impact copolymer composition is produced by in-reactor blending of a xylene insoluble polypropylene fraction and a xylene soluble ethylene-propylene rubber (EPR) fraction. The composition comprises from about 5 wt. % to about 50 wt. % a xylene-soluble portion and from about 50 wt. % to about 95 wt. % a xylene-insoluble portion. The ratio of the weight average molecular weight of said xylene-soluble portion to that of said xylene-insoluble portion is from about 0.5 to about 1.8. The intrinsic viscosity of said xylene-soluble portion is from about 0.5 to about 7.0 dL/g. The xylene-soluble portion comprises from about 30 to about 70 mole percent ethylene units.
摘要翻译: 通过将二甲苯不溶性聚丙烯馏分和二甲苯可溶乙丙橡胶(EPR)馏分进行反应器内共混来制备可涂漆的抗冲共聚物组合物。 组合物包含约5wt。 %至约50wt。 %二甲苯可溶部分和约50wt。 %至约95wt。 %二甲苯不溶部分。 所述二甲苯可溶部分的重均分子量与所述二甲苯不溶部分的重均分子量之比为约0.5至约1.8。 所述二甲苯可溶部分的特性粘度为约0.5至约7.0dL / g。 二甲苯可溶部分包含约30至约70摩尔%的乙烯单元。
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