Surface treatment of inorganic fillers

Details Surface treatment of inorganic fillers Surface treatment of inorganic fillers

C - Chemistry, Metallurgy

08

K

400/4102, 400/53

C08K 9/06 (2006.01) A61L 27/44 (2006.01) C08K 3/00 (2006.01) C08K 3/36 (2006.01) C08K 9/08 (2006.01) C08L 83/04 (2006.01) C09C 1/30 (2006.01) C09C 3/12 (2006.01)

Patent

CA 1205239

SURFACE TREATMENT OF INORGANIC FILLERS Abstract This invention relates to a method of surface treating particulate inorganic fillers with a surface- treating agent which is an equilibrated reaction mixture consisting essentially of R2SiO2/2 units, RSiO3/2 units and CH3O1/2 radicals wherein the mixture contains A moles of R2SiO2/2 units per mole of RSiO3/2 units and B moles of CH3O1/2 radicals, A having an average value of from 0.5 to 10 and B having an average value of from 3 to 6, the value of B being related to A such that when A = 0.5, B = 6 and when A = 10, B = 3, and R being a hydrocarbon radical of from 1 to 10 inclusive carbon atoms or a haloalkyl radical of from 1 to 10 inclusive carbon atoms. Reinforcing silica fillers, surface-treated with such equilibrated reaction mixtures can be compounded with polydiorgano- siloxanes curable to elastomers and cured to obtain silicone elastomers possessing high optical clarity and physical properties which make the cured elastomer uniquely suitable for use as prosthetic devices for use on or within the body.

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