C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 9/00 (2006.01) C08F 236/10 (2006.01) C08L 7/00 (2006.01) C08L 9/06 (2006.01) C08L 25/00 (2006.01)
Patent
CA 2051923
FS-9009067 Title: ULTRA HIGH MOLECULAR WEIGHT ELASTOMER COMPOSITION Abstract of the Disclosure Elastomer compositions comprising (A) ultra high molecular weight copolymer compositions of 1,3-conjugated dienes and aromatic vinyl compounds having a weight average molecular weight of greater than about 1,000,000, (B) carbon black, and, optionally (C) oil are described. The ultra high molecular weight copolymer compositions which are also characterized as having an intrinsic viscosity in tetrahydrofuran of at least about 4.0 may be obtained by a process which comprises polymerizing a I ,3-conjugated diene and a vinyl aromatic compound in a hydrocarbon solvent in the presence of a trimetalated 1-alkyne catalyst which comprises the reaction product of a 1-alkyne containing at least 4 carbon atoms, an organo metallic compound R°M and a 1,3-conjugated diene wherein 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. The elastomer compositions of the invention can be prepared with large amounts of carbon black (e.g., at least 100 phr) and large amounts of oil (e.g., at least 80 phr) and these elastomer compositions exhibit high tensile strength, mechanical strength, wear resistance and thermal resistance.
Hashimoto Takatsugu
Kang Jung W.
Bridgestone Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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