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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0752415 (1991-08-30) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 471 인용 특허 : 0 |
Catalysts comprising (a) derivatives of mono, bi and tricyclopentadienyl coordination complexes with a transition metal and (b) and an alumoxane are employed in a process of producing polyolefins of controlled molecular weight.
A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas (C5R′m)pR″s(C5R′m)MeQ3-p and R″s(C5R′m)2MeQ′ wherein Me is a Group 4B, 5B, 6B metal, (C5R′m) is a substituted cyclopentadienyl, each R′, which can be the same or different,
A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas (C5R′m)pR″s(C5R′m)MeQ3-p and R″s(C5R′m)2MeQ′ wherein Me is a Group 4B, 5B, 6B metal, (C5R′m) is a substituted cyclopentadienyl, each R′, which can be the same or different, is hydrogen, ethyl, propyl, butyl, amyl, isoamyl, hexyl, isobutyl, heptyl, octyl, nonyl, decyl, cetyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4-C6 ring, R″is a C1-C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5R′m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q′is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1; at least one R′is a hydrocarbyl radical when at least one Q is an alkyl radical and (b) an alumoxane.
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