Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1982-12-02
1984-06-12
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524493, 524860, 524866, 427387, 428447, C08L 8300
Patent
active
044542887
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 R.sub.2 SiO.sub.2/2 units, RSiO.sub.3/2 units and CH.sub.3 O.sub.1/2 radicals wherein the mixture contains A moles of R.sub.2 SiO.sub.2/2 units per mole of RSiO.sub.3/2 units and B moles of CH.sub.3 O.sub.1/2 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 polydiorganosiloxanes 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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Lee Kenneth M.
Ulman Katherine L.
Dow Corning Corporation
Marquis Melvyn I.
Rackoczy Richard E.
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