Patent ID: 6797762
Filing Date: 2004-09-28
Classification: C08F,C08K,Y10T

Abstract:
A method of preparing a diene-based elastomer/filler composite which comprises(A) polymerizing at least one conjugated diene hydrocarbon selected from isoprene, 1,3-butadiene and mixtures thereof or copolymerizing at least one conjugated diene selected from isoprene and 1,3-butadiene, and mixtures thereof, styrene in an organic solvent and in the presence of at least one treated particulate filler wherein said particulate filler is a precipitated silica, (B) terminating the polymerization reaction; wherein said elastomer composite contains from about 10 to about 100 phr of said filler; wherein said treated filler is treated by (1) first treating said filler to silanize said filler with an organosilane followed by (2) treating said silanized filler with said a polymerization initiator is selected from butyl lithium or tetramethyl ethylenediamine; wherein said organosilane is selected from the group consisting of 3-acryloxypropyl-trimethoxy silane, methacryloxymethyl trimethoxy silane, methacryloxymethyl triethoxy silane, methacryloxymethyl trimethyl silane, allyltriethoxysilane, allyltrimethoxysilane, 5-(biscycloheptenyl)triethoxysilane, 3-butenyltriethoxysilane, [2-(3-cyclohexenyl)ethyl]trimethoxysilane, 3-(cyclpentadienylpropyl)triethoxysilane, 3-acryloxypropyl-methyldichlorosilane, 3-acryloxypropy-dimethylmethoxysilane, 3-acryloxypropyl-trichlorosilane, allylmethyldichlorosilane, allyldimethylsilazane, 5-(biscycloheptenyl)dimethylchlorosilane, 3-butenylmethyldichlorosilane, [2-(3-cyclohexenyl)ethyl]dimethylchlorosilane, [2-(3-cyclohexenyl)ethyl]trichlorosilane, 3-(cyclopentadienyl)trimethylsilane, and styrylethyl trimethoxysilane.