C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 212/06 (2006.01) C08F 236/04 (2006.01) C08F 236/10 (2006.01)
Patent
CA 2057847
Abstract of the Disclosure A continuous process is described for preparing copolymer compositions of 1,3-conjugated dienes and aromatic vinyl compounds having a weight average molecular weight of greater than about 100,000, and in one embodiment above about 900,000. The process comprises: (A) continuously introducing Into a reactor, a 1,3-conjugated diene, an aromatic vinyl compound, a hydrocarbon solvent and a polymerization catalyst comprising a trimetalated 1-alkyne wherein the catalyst is obtained by reacting at a temperature of above about 70°C, a 1-alkyne containing at least 4 carbon atoms, an organo metallic compound, R°M and a 1,3-conjugated diene wherein the alkyne is characterized by the formula RCH2C?CH (II) wherein R is an alkyl group, R° is a hydrocarbyl group, M is an alkali metal, the mole ratio of R°M to 1-alkyne is about 3:1, and the mole ratio of conjugated diene to 1-alkyne Is from about 2:1 to about 30:1; (B) continuously agitating the contents of the reactor while effecting the polymerization reaction to form the copolymer; and (C) continuously withdrawing the copolymer from the reactor. The invention also relates to the copolymers thus prepared.
Hashimoto Takatsugu
Kang Jung W.
Roggeman David M.
Bridgestone Corporation
Hashimoto Takatsugu
Kang Jung W.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Roggeman David M.
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