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US 6,806,321 B2Granted
Process for producing modified polymer rubber
AssigneeSumitomo Chemical Company, Limited
InventorsMayumi Oshima, Seiichi Mabe, Katsunari Inagaki
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Abstract
There is provided a process for producing a modified polymer rubber, which comprises the steps of: (1) polymerizing a conjugated diene monomer, or the conjugated diene monomer and an aromatic vinyl monomer in the presence of an alkali metal catalyst in a hydrocarbon solvent to produce an active polymer having an alkali metal at its end(s), and (2) reacting the active polymer with a ketone compound represented by a specific formula to produce a modified polymer rubber.
Claims3
A process for producing a modified polymer rubber, which comprises the steps of:
- (1) polymerizing a conjugated diene monomer, or the conjugated diene monomer and an aromatic vinyl monomer in the presence of an alkali metal catalyst in a hydrocarbon solvent to produce an active polymer having an alkali metal at its end(s), and
- (2) reacting the active polymer with a ketone compound represented by the following formula (1) to produce a modified polymer rubber,
- wherein R1 is an alkyl group, an alkoxy group, a phenyl group or a benzyl group having 1 to 8 carbon atoms;
- and R2 is an N-substituted cyclic amino group.
1 more element
Dependencies are inferred from the claim text.