公开(公告)号：US20160257809A1

公开(公告)日：2016-09-08

申请号：US15029470

申请日：2014-10-01

Applicant: BASELL POLIOLEFINE ITALIA S.R.L.

Inventor： GISELLA BIONDINI ,  MICHELE GRAZZI ,  LUCA LUNGHI ,  CLAUDIO CAVALIERI

IPC: C08L23/16 ,  E04D5/06 ,  E04B1/94 ,  H01B3/44

CPC classification number: C08L23/16 ,  C08K3/016 ,  C08K3/20 ,  C08L23/142 ,  C08L23/20 ,  C08L2201/02 ,  C08L2205/025 ,  C08L2205/03 ,  C08L2207/02 ,  E04B1/942 ,  E04D5/06 ,  H01B3/441

Abstract: The present disclosure relates to highly filled polyolefin compositions with improved balance of properties particularly for applications where puncture and tear resistance is requested comprising a flexible heterophasic polyolefin composition (I), consisting of a crystalline polymer fraction (A) consisting of a copolymer of propylene with ethylene having a fraction insoluble in xylene at 25° C. of at least 90% by weight, and an elastomeric fraction (B) consisting of a copolymer or blend of copolymers of ethylene with propylene; the copolymer or blend containing units derived from ethylene in a quantity lower than 40% by weight. The fraction soluble in xylene at 25° C. of the polyolefin composition having an IVgpc lower than 2.5 dl/g, a broad molecular weight distribution Mw/Mn (GPC) equal to or higher than 4, and a Mz/Mw (GPC) equal to or higher than 2.5. The filled polyolefin composition further comprises inorganic filler (II) and a butene-1 copolymer having: a flexural modulus (ISO 178) lower than 60 MPa, a Shore A (ISO 868) lower than 90 and a Tg (DMTA) lower than −20° C.

Abstract translation: 本发明涉及高度填充的聚烯烃组合物，其具有改善的性能平衡，特别是对于要求穿刺和抗撕裂性的应用，包括柔性多相聚烯烃组合物（I），其由由丙烯与丙烯共聚物组成的结晶聚合物部分（A） 乙烯在25℃下不溶于二甲苯的份数为至少90重量％，和由乙烯与丙烯的共聚物或共聚物的共聚物或共混物组成的弹性体组分（B） 含有低于40重量％乙烯衍生的单元的共聚物或共混物。 具有IVgpc低于2.5dl / g，宽分子量分布Mw / Mn（GPC）等于或高于4的聚烯烃组合物在25℃下可溶于二甲苯的部分和Mz / Mw（GPC） 等于或高于2.5。 填充的聚烯烃组合物还包含无机填料（II）和丁烯-1共聚物，其弯曲模量（ISO 178）低于60MPa，肖氏A（ISO 868）低于90，Tg（DMTA）低于 - 20°C