Fillers, pigments and mineral powders treated with organopolysiloxanes
AssigneeDow Corning Corporation
InventorPierre Chevalier
Life of this patent
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Abstract
A filler, pigment or mineral powder surface treated with a silicon compound is described. The silicon compound is a polydiorganosiloxane having at least one terminal group of the formula —SiR″(OR′)2 or —Si(OR′)3, wherein R″ represents an alkyl, substituted alkyl, alkenyl or aryl group and each R′ represents an alkyl group having 1 to 4 carbon atoms. The filler, pigment or mineral powder treated is hydrophobic and is used in composites or industrial processes.
Claims18
A filler, pigment or mineral powder surface treated by chemical interaction with a silicon compound, wherein the silicon compound is a polydiorganosiloxane having at least two terminal groups of the formula —SiR″(OR′)2, wherein R″ represents an alkyl, substituted alkyl, alkenyl or aryl group and each R′ represents an alkyl group having 1 to 4 carbon atoms, wherein the polydiorganosiloxane has a vapour pressure lower than 2000 Pa at 25° C.
A process for the surface treatment of a filler, pigment or mineral powder with a silicon compound, wherein the silicon compound is a polydiorganosiloxane having at least two terminal groups of the formula —SiR″(OR′)2, wherein R″ represents an alkyl, substituted alkyl, alkenyl or aryl group and each R′ represents an alkyl group having 1 to 4 carbon atoms, wherein the surface treatment includes chemical interaction between the surface and the silicon compound, and wherein the polydiorganosiloxane has a vapour pressure lower than 2000 Pa at 25° C.
A process for producing a plastics or rubber composition, wherein an organic plastics or rubber matrix material is mixed with a filler or pigment and a polydiorganosiloxane having at least two terminal groups of the formula —SiR″(OR′)2, wherein R″ represents an alkyl, substituted alkyl, alkenyl or aryl group and each R′ represents an alkyl group having 1 to 4 carbon atoms, wherein a surface of the filler or pigment is treated by chemical interaction with the polydiorganosiloxane, and wherein the polydiorganosiloxane has a vapour pressure lower than 2000 Pa at 25° C.
Dependencies are inferred from the claim text.