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US 4,741,773 AGranted
Water repellent composition
AssigneeMitsubishi Chemical Industries Limited
InventorsKatsuhiko Kuroda, Toru Tagawa, Hiroo Katayama
Life of this patent
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Abstract
A water repellent composition being liquid at room temperature, which comprises a silicone oil and a substantially non-volatile paraffinic oil or low molecular weight resin, wherein the separation index of the paraffinic oil or low molecular weight resin to the silicone oil is at most 0.4.
Claims12
A water-repellent composition which is liquid at room temperature, which consists essentially of:
- (a) a silicone oil;
- (b) a substantially non-volatile paraffinic oil or resin having a molecular weight of up to 5,000;
- and
- (c) a compatibilizing agent, which is capable of reducing the separation index of the substantially non-volatile volatile paraffinic oil or hydrocarbon resin to the silicon oil to 0.4 at most, said compatibilizing agent being selected from the group consisting of a surfactant having a HLB of from 0 to 6, a perfluoroalcohol-polypropylene glycol-isocyanate condensation product, an ester of a fatty acid with a monohydric or polyhydric alcohol, a copolymer of an .alpha.-olefin having from 6-52 carbon atoms with a maleic acid monoester or maleic acid diester, and an ethylene-vinyl acetate copolymer.
1 more element
The water-repellent composition according to claim 6, wherein the weight ratio of the silicone oil and the paraffinic oil resin is within a range of 60:40 to 20:80.
Dependencies are inferred from the claim text.