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US 6,780,516 B2Granted
Anti-fog coating composition, process, and article
AssigneeGeneral Electric Company
InventorMao Chen
Life of this patent
Estimating the term…
Abstract
An anti-fog coating composition comprises a silicone polymer or oligomer, a water dispersible polyurethane polymer or oligomer, and water. A process for forming an anti-fog film comprises applying the anti-fog coating composition to a substrate and coalescing the silicone and polyurethane compounds to form the film. In another embodiment, the process for forming the anti-fog film comprises applying the components of the anti-fog coating composition to a substrate and crosslinking the components to form the anti-fog film. The components generally include a polyol, an isocyanate, a catalyst, and a silicone polymer or oligomer.
Claims10
An anti-fog coating composition comprising a silicone compound free from a sulfonic acid functional group;
- a water dispersible polyurethane compound;
- and an aqueous solvent, wherein the silicone compound is of the formula:
- MaM′bDcD′dTeT′fQg,
- wherein the subscripts a, c, d, e, f, and g are zero or a positive integer, subject to the limitation that the sum of the subscripts b, d, and f is one or greater;
- M has the formula:
- R13 SiO1/2, wherein each R1 is independently a monovalent hydrocarbon radical having from one to forty carbon atoms;
- M′ has the formula:
- R23−hR3hSiO1/2, wherein each R2 and R3 are independently monovalent hydrocarbon radicals having from one to forty carbon atoms, and the subscript h is 1, 2, or 3;
- D has the formula:
- R42SiO2/2, wherein each of R4 is independently a monovalent hydrocarbon radical having from one to forty carbon atoms;
- D′ has the formula:
- R52−iR6iSiO2/2, wherein each of R5 and R6 is independently a monovalent hydrocarbon radical having from one to forty carbon atoms, and the subscript i is 1 or 2;
- T has the formula:
- R7SiO3/2, wherein each R7 is a monovalent hydrocarbon radical having from one to forty carbon atoms;
- T′ has the formula R8SiO3/2, wherein R8 is a monovalent hydrocarbon radical having from one to forty carbon atoms;
- and Q has the formula:
- SiO4/2,
- or an ionic or nonionic siloxane alkoxylate of the formula:
- wherein each of R9 through R17 are independently a monovalent hydrocarbon radical, and R18 is R19—Z—(CmH(2m−1)R20O)j(CnH2nO)kR21, wherein in and n are integers greater than or equal to 0;
- j and k are integers greater than or equal to 0, subject to the proviso that the sum of j+k is greater than or equal to 1;
- Z is —O−, —S−, —CO−, —NH−, or —NH2—;
- R19 is a divalent hydrocarbylene radical, R20 and R21 are independently hydrogen, alkyl, hydroxyalkyl, amino, amide, amineoxide, cyano, isocyano, aryl, arylene, carboxy, alkoxy, halogen, haloalkyl, haloalkoxy, sulfo, sulfarno, phosphono, salts thereof, or a combination comprising at least one of the foregoing moieties, and wherein x and y are integers greater than or equal to 0, subject to the proviso that x+y is greater than or equal to 1.
19 more elements
A glass or plastic article having an anti-fogging surface comprising:
- a glass or plastic substrate;
- and
- an anti-fog coating disposed on at least one surface of the substrate, the anti-fog coating comprising a silicone compound free of a sulfonic acid function group;
- a water dispersible polyurethane compound;
- and water, wherein the silicone compound is of the formula:
- MaM′bDcD′dTeT′fQg,
- wherein the subscripts a, c, d, e, f, and g are zero or a positive integer, subject to the limitation that the sum of the subscripts b, d, and f is one or greater, M has the formula:
- R13SiO1/2, wherein each R1 is independently a monovalent hydrocarbon radical having from one to forty carbon atoms;
- M′ has the formula:
- R23−hR3hSiO1/2, wherein each R2 and R3 are independently monovalent hydrocarbon radicals having from one to forty carbon atoms, and the subscript h is 1, 2, or 3;
- D has the formula:
- R42SiO2/2, wherein each R4 is independently a monovalent hydrocarbon radical having from one to forty carbon atoms;
- D′ has the formula:
- R52−iR6iSiO2/2, wherein each of R5 and R6 is independently a monovalent hydrocarbon radical having from one to forty carbon atoms, and the subscript i is 1 or 2;
- T has the formula:
- R7SiO3/2, wherein each R7 is a monovalent hydrocarbon radical having from one to forty carbon atoms;
- T′ has the formula:
- R8SiO3/2, wherein R8 is a monovalent hydrocarbon radical having from one to forty carbon atoms;
- and Q has the formula:
- SiO4/2,
- or an ionic or nonionic siloxane alkoxylate of the formula:
- wherein each of R9-17 are independently a monovalent hydrocarbon radical, R18 is of th general formula:
- R19—Z—(CmH(2m−1)R20O)j(CnH2nO)kR21, m and n are integers greater than or equal to 0;
- j and k are integers greater than or equal to 0. subject to the proviso that the sum of j+k is greater then or equal to 1;
- Z is —O—, —S—, —CO—, —NH—, or —NH2—;
- R19 is a divalent hydrocarbylene radical, R20 and R21 are independently hydrogen, alkyl, hydroxyalkyl, amino, amide, amineoxide, cyano, isocyano, aryl, arylene, carboxy, alkoxy, halogen, haloalkyl, haloalkoxy, sulfo, sulfamo, phosphono, salts thereof, or a combination comprising at least one of the foregoing and wherein x and y are integers greater than or equal to 0, subject to the proviso that x+y is greater than or equal to 1.
23 more elements
Dependencies are inferred from the claim text.