Silicone foam control compositions
AssigneeDow Corning Corporation
InventorsSerge Creutz, Alain Hilberer
Life of this patent
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Abstract
A foam control composition comprises a polydiorganosiloxane fluid comprising units of the formula where each group R, which may be the same or different, is selected from an alkyl group having 1 to 36 carbon atoms or an aryl group or aralkyl group having up to 36 carbon atoms, the mean number of carbon atoms in the groups R being at least 1.3, and an additive composition of melting point 35 to 100° C. comprising a substantially non-polar organic material, preferably a polyol substantially fully esterified by carboxylate groups each having 7 to 36 carbon atoms.
Claims22
A foam control composition comprising a polydiorganosiloxane fluid comprising units of the formula
- where each group R, which may be the same or different, is selected from an alkyl group having 1 to 36 carbon atoms or an aryl group or aralkyl group having up to 36 carbon atoms, the mean number of carbon atoms in the groups R being at least 1.3, and an additive composition of melting point 35 to 100° C. comprising a non-polar polyol ester which is a polyol substantially fully esterified by carboxylate groups each having 7 to 36 carbon atoms.
A foam control composition comprising a polydiorganosiloxane fluid comprising at least 10% diorganosiloxane units of the formula
- and up to 90% diorganosiloxane units of the formula
- wherein X denotes a divalent aliphatic organic group bonded to silicon through a carbon atom;
- Ph denotes an aromatic group;
- Y denotes an alkyl group having 1 to 4 carbon atoms;
- and Y′ denotes an aliphatic hydrocarbon group having 1 to 24 carbon atoms, and an additive composition comprising a non-polar organic material of melting point 35 to 100° C. which is miscible with the polydiorganosiloxane fluid.
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Dependencies are inferred from the claim text.