Patent ID: 6566478
Filing Date: 2003-05-20
Classification: B60C,C08F,C08K,C08L,Y02T

Abstract:
A process for preparing a rubbery polymer having a high vinyl content which comprises:polymerizing at least one diene monomer with a lithium initiator selected from the group consisting of allylic lithium compounds and benzylic lithium compounds at a temperature which is within the range of about 5Â° C. to about 120Â° C. in the presence of a Group I metal alkoxide and a polar modifier, wherein the molar ratio of the Group I metal alkoxide to the polar modifier is within the range of about 0.1:1 to about 10:1; and wherein the molar ratio of the Group I metal alkoxide to the lithium initiator is within the range of about 0.05:1 to about 10:1.