Patent ID: 6897279

Claim:
A process for producing a conjugated diene rubber gel having a swelling index of not larger than 70 as measured in toluene, characterized in that a monomer mixture comprising 50% to 99.9% by weight of a conjugated diene monomer, 0% to 30% by weight of an aromatic vinyl monomer, 0% to 20% by weight of other ethylenically unsaturated monomer and 0.1% to 20% by weight of a crosslinking monomer is copolymerized in the presence of not larger than 3 parts by weight, based on 100 parts by weight of the monomers, of a chain transfer agent by an emulsion polymerization procedure, wherein the emulsion copolymerization reaction is terminated at a conversion in the range of 50% to 90%.