Lanthanide-based catalyst composition for producing cis-1,4-polydienes
AssigneeBridgestone Corporation
InventorsSteven Luo, Michael W. Hayes, Jeffery M. Hawkins
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Abstract
A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) a lanthanide compound, (b) an organoaluminum hydride, and (c) a tin halide compound.
Claims27
A catalyst composition that is the combination of or the reaction product of ingredients comprising:
- (a) a lanthanide compound;
- (b) an organoaluminum hydride;
- and
- (c) a tin halide compound.
A catalyst composition formed by a process comprising the step of combining:
- (a) a lanthanide compound;
- (b) an organoaluminum hydride;
- and
- (c) a tin halide compound.
A process for forming conjugated diene polymers comprising the step of:
- polymerizing conjugated diene monomers in the presence of a catalytically effective amount of a catalyst composition formed by combining:
- (a) a lanthanide compound;
- (b) an organoaluminum hydride;
- and
- (c) a tin halide compound.
A process for narrowing the molecular weight distribution of cis-1,4-polydienes produced by using a lanthanide-based catalyst composition comprising an organoaluminum hydride as an alkylating agent, the method comprising:
- polymerizing conjugated diene monomers in the presence of a catalytically effective amount of a catalyst composition formed by combining:
- (a) a lanthanide compound;
- (b) an organoaluminum hydride;
- and
- (c) a tin halide compound.
A catalyst composition that is the combination of or the reaction product of ingredients consisting essentially of:
- (a) a lanthanide compound;
- (b) an organoaluminum hydride;
- and
- (c) a tin halide compound.
The catalyst composition 24, where the molar ratio of neodymium to chloride is from about 1:10:3 to about 1:13:3.
A catalyst composition for the solution or liquid phase polymerization of conjugated dienes, where the catalyst composition is the combination of or the reaction product of ingredients comprising:
- (a) a lanthanide compound;
- (b) an organoaluminum hydride;
- and
- (c) a tin halide compound.
Dependencies are inferred from the claim text.