公开(公告)号：US11674026B2

公开(公告)日：2023-06-13

申请号：US17205438

申请日：2021-03-18

申请人： DDP SPECIALTY ELECTRONIC MATERIALS US, LLC

发明人： Wenyi Huang ,  William Ripmeester

IPC分类号： C08L23/12 ,  C08L23/16 ,  C08J5/18

CPC分类号： C08L23/12 ,  C08J5/18 ,  C08L23/16 ,  C08J2323/12 ,  C08J2323/16 ,  C08J2423/12 ,  C08J2423/16 ,  C08L2203/162

摘要： Microporous polymer films and methods of making same are disclosed. The microporous polymer film comprises:



(a) 50 to 95 weight percent of polypropylene copolymer comprising (i) polypropylene homopolymer chain segments in total amount of from 50-82 wt. %, and (ii) ethylene-containing copolymer chain segments in total amount of from 18-50 wt. %; wherein at least a portion of the ethylene-containing copolymer chain segments comprise polymerized units of ethylene in an amount of at least 45 wt. % of the ethylene-containing copolymer chain segments; and
(b) 5 to 50 weight percent of ethylene-propylene elastomer, wherein at least 45 weight percent of the polymerized units in the ethylene-propylene elastomer are units of ethylene.