专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2004016663A1 CLEAR IMPACT-RESISTANT SYNDIOTACTIC POLYPROPYLENE 审中-公开
标题翻译：耐冲击聚合物聚丙烯
公开(公告)号：WO2004016663A1
公开(公告)日：2004-02-26
申请号：PCT/US2003/024753
申请日：2003-08-07
申请人： FINA TECHNOLOGY, INC.
发明人： SCHARDL, Joseph , SUN, Likuo , BAUMGARTNER, Alan, S. , BOYLE, Kevin , DEKUNDER, Greg
IPC分类号： C08F8/00
CPC分类号： C08L23/12 , C08L23/0815 , C08L23/142 , C08L2205/03 , C08L2666/06
摘要： Syndiotactic polypropylene blends having a unique set of mechanical properties may be prepared by blending syndiotactic polypropylene with an ultra low density polyethylene and, optionally, an isotactic polypropylene random copolymer. The syndiotactic polypropylene blends of the present invention have been found to have improved impact strength, reduced haze, increased light transmittance, and reduced flexural modulus. It has been determined that the addition of about 10 to about 50 wt% of an ultra low density polyethylene plastomer to a syndiotactic polypropylene can greatly enhance mechanical toughness, particularly at low temperatures, while maintaining good optical clarity. These results are made possible by using a sPP material with good optical clarity and dispersing the ULDPE plastomer uniformly throughout the sPP matrix to act as a sort of impact modifier. Moreover, the addition of about 10 to about 50 wt% of an iPP random copolymer to the sPP matrix phase provides comparable or improved mechanical properties while also resulting in a significant reduction in injection molding cycle times. The syndiotactic polypropylene blends according to the present invention may be further processed according to accepted practices to make cast films, blown films, co-extruded films, laminated sheets, injection molded parts, blow molded containers, and other articles using basic plastic fabrication techniques as known in the art.
摘要翻译：具有独特机械性能的间同立构聚丙烯共混物可以通过将间同立构聚丙烯与超低密度聚乙烯和任选的全同立构聚丙烯无规共聚物共混来制备。已经发现本发明的间同立构聚丙烯共混物具有改善的冲击强度，降低的雾度，增加的透光率和降低的弯曲模量。已经确定，将约10至约50重量％的超低密度聚乙烯塑性体添加到间同立构聚丙烯可以极大地增强机械韧性，特别是在低温下，同时保持良好的光学透明度。通过使用具有良好光学透明度的sPP材料并将ULDPE塑性体均匀地分散在整个sPP基体中作为一种抗冲改性剂，可以实现这些结果。此外，向sPP基质相添加约10至约50重量％的iPP无规共聚物可提供相当或改进的机械性能，同时也导致注模周期时间的显着降低。根据本发明的间同立构聚丙烯共混物可以根据公认的做法进一步加工，以使用基本的塑料制造技术制造流延膜，吹塑薄膜，共挤出薄膜，层压片，注模部件，吹塑容器和其它制品，本领域已知

IPRDB

热门服务

关于我们

友情链接

联系方式