An electroconductive polyolefin composition comprising (1) 100 parts by weight of a polyolefin resin, (2) 10 to 60 parts by weight of carbon black, (3) 0.1 to 6 parts by weight of sulfur and (4) at least 0.1 part by weight of one or two specified accelerators, and optionally containing 5 to 60 parts by weight of atactic polypropylene.
SOLID CATALYST COMPONENT FOR OLEFIN POLYMERIZATION AND CATALYST
申请人:Toho Titanium Co., Ltd.
公开号:EP1260524A1
公开(公告)日:2002-11-27
The solid catalyst component for polymerization of olefins comprising (a) a magnesium compound, (b) titanium tetrachloride, (c) a phthalic acid diester or a derivative thereof, and (d1) a hydroxy group-containing hydrocarbon compound having a specific structure or (d2) a mercapto group-containing hydrocarbon compound having a specific structure and the olefin polymerization catalyst can produce olefin polymers in a very high yield, particularly can produce propylene polymers in a very high yield, while retaining high stereoregularity.