Patent ID: 6624256
Filing Date: 2003-09-23
Classification: C08C

Abstract:
A method for preparation of siloxane-functionalized high 1,4-cis polybutadiene comprising:polymerizing of 1,3-butadiene or 1,3-butadiene derivatives using a catalyst in the presence of non-polar solvent to yield high 1,4-cis polybutadiene, the catalyst comprising 1) rare earth compound, 2) halogen-containing compound, and 3) organoaluminum compound; and reacting high 1,4-cis polybutadiene with a siloxane compound represented by the formulas I or II to siloxane-functionalized high 1,4-cis polybutadiene: where R1 to R4 are the same or different and include halogen, or C1 to C20 alkyl or aryl group and n is an integer of 1 to 20, where R5 to R8 are the same or different and include halogen, or C1 to C20 alkyl or aryl group and m is a integer of 1 to 20.