Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1993-08-23
1995-01-03
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526114, 526115, 526116, 526128, 526132, 526149, 526160, 526170, 526279, 5263471, C08F 4643, C08F 1214
Patent
active
053787773
ABSTRACT:
There is disclosed a process for producing a styrenic polymer or copolymer each having syndiotactic configuration which comprises polymerizing a styrenic monomer represented by the general formula (I) ##STR1## such as phenylstyrene and trimethylsilylstyrene, or copolymerizing at least two styrenic monomers of the formula (I) or at least one styrenic monomer of the formula (I) with at least one styrenic monomer other than the styrenic monomer of the formula (I) in the presence of a catalyst comprising as principal ingredients(A) a transition metal compound derived from a group IVB metal of the Periodic Table such as pentamethylcyclopentadienyltrimethyltitanium and (B) a compound producing an ionic complex by the reaction with the above transition metal compound such as tri(n-butyl)ammonium tetra(pentafluorophenyl)borate. The aforementioned process enables efficient production of a styrenic polymer or copolymer excellent in heat resistance and mechanical strength.
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Machida Shuji
Watanabe Masami
Idemitsu Kosan Co. Ltd.
Teskin Fred
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