Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1992-10-14
1994-08-30
Pal, Asok
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502103, 585512, 526153, 526160, C08F 464, B01J 3100
Patent
active
053428137
ABSTRACT:
A catalyst for polymerizing an aromatic vinyl compound is provided which is composed of a catalyst component (A) and a catalyst component (B); the catalyst component (A) being a reaction product derived by reacting an organic transition metal compound having a substituted or unsubstituted cyclopentadienyl group, with an alkylaluminum compound, and represented by the general formula (I): ##STR1## where C.sub.5 R.sup.1.sub.m is a substituted or unsubstituted cyclopentadienyl group: R is hydrogen or a hydrocarbon group having 1 to 20 carbons, each R.sub.1 being independent; R.sup.2 is an alkylene group having 1 to 4 carbons, a dialkylsilicon group, a dialkylgermanium group, an alkylphoshine group, or an alkylamine group, the alkylene or alkyl group, and R.sup.2 crosslinks the two (C.sub.5 R.sup.1.sub.m) rings; m is an integer of 0 to 5; n is 0 or 1; when n=0, m=5, Q is an alkyl group or a halogen atom; R.sup.3 is a hydrocarbon group having 1 to 18 carbons; and M is a metal of Group IVB of Periodic Table; and the catalyst component (B) being an aluminoxane represented by the general formula (II) or (III): ##STR2## where p is an integer of 4 to 30, and R.sup.4 is a hydrocarbon group. A process for producing a polymer of an aromatic vinyl compound is also provided which comprises polymerizing the aromatic vinyl compound in the presence of the catalyst specified above.
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patent: 4701432 (1987-10-01), Welborn
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patent: 5086135 (1992-02-01), Kissin
Pal Asok
Tosoh Corporation
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