Patent ID: 6136919
Filing Date: 2000-10-24
Classification: C08F,Y10T

Abstract:
A method of preparing a diene-based elastomer composite containing a particulate filler dispersion therein comprises (A) polymerizing at least one conjugated diene hydrocarbon or copolymerizing at least one conjugated diene hydrocarbon and a aromatic vinyl compound in an organic solvent and in the presence of (1) polymerization promoting catalyst and (2) at least one particulate filler selected from at least one of carbon black and precipitated silica and (B) terminating the polymerization reaction; wherein said elastomer composite contains from about 10 to about 100 phr of said filler; wherein said catalyst is a combination of a first co-catalyst as a metallocene catalyst component and a second co-catalyst selected from at least one of an organoaluminum, organozinc and organomagnesium compound; and wherein said catalyst combination is provided as (i) at least one of said fillers as a pre-treated filler having said first co-catalyst on the surface thereof and said second co-catalyst being added to the monomer/solvent/filler mixture or (ii) at least one of said fillers as a pre-treated filler having said second co-catalyst on the surface thereof and said first co-catalyst being added to the monomer/solvent/filler mixture.