发明名称 |
PROCESS FOR PRODUCING A PROPYLENE BLOCK COPOLYMER COMPOSITION AND THE COMPOSITION PRODUCED BY SAID PROCESS |
摘要 |
<p>A process for producing a propylene block copolymer composition having an ethylene content ranging from 3 to 40% by weight and being greater than the weight of the rubbery propylene copolymer formed in stage (II) below, which comprises the following stages (I) and (II): (I) a first stage of polymerizing propylene containing 0 to 5 mole% of another olefin in the presence of a catalyst composed of (A) a solid titanium catalyst component consisting essentially of titanium, magnesium, halogen, and an electron donor, (B) an organoaluminum compound, and (C) an organic silicon compound having an Si-O-C bond or an Si-N-C bond to thereby form a crystalline propylene polymer or copolymer; and (II) a second stage of polymerizing propylene and ethylene, or propylene, ethylene and another olefin in the presence of the reaction product of the first stage and the same catalyst as used in the first stage to form a rubbery propylene copolymer and a crystalline ethylene polymer or copolymer.</p> |
申请公布号 |
CA1190689(A) |
申请公布日期 |
1985.07.16 |
申请号 |
CA19820415385 |
申请日期 |
1982.11.12 |
申请人 |
MITSUI PETROCHEMICAL INDUSTRIES, LTD. |
发明人 |
KASHIWA, NORIO;TOYOTA, AKINORI |
分类号 |
C08F4/00;C08F4/42;C08F4/60;C08F4/64;C08F10/06;C08F210/06;C08F297/00;C08F297/08;(IPC1-7):C08F297/08;C08F4/66 |
主分类号 |
C08F4/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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