Patent ID: 6811823
Filing Date: 2004-11-02
Classification: C01P,C09C

Abstract:
In a method of making modified silica fillers in which silica surfaces are contacted with compositions containing organosilicon compounds, the improvement comprising treating silica surfaces with a composition containing organosilicon compounds comprising only monomeric dialkyldichlorosilanes and trialkoxysilanes, the compositions being (i) mixtures or blends of dialkyldichlorosilanes, and trialkoxysilanes free of hydrocarbon or organofunctional groups reactive with silica surfaces, or (a) mixtures or blends of substituted dialkyldichlorosilanes in which the substituted dialkyldichlorosilanes are free of hydrocarbon or organofunctional groups reactive with silica surfaces, and in which the trialkoxysilanes are free of hydrocarbon or organofunctional groups reactive with silica surfaces; the mixtures and blends (i) and (ii) containing the dialkyldichlorosilanes and the trialkoxysilanes being in a weight ratio of 1:0.1 to 1:2, respectively.