Emulsion and coated product thereof
AssigneeE. I. Du Pont de Nemours and Company
InventorsSatoko Iwato, Mureo Kaku
Life of this patent
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Abstract
A substantially aqueous emulsion and a coated product made with the emulsion are disclosed. The emulsion comprises, or is produced by combining, at least one fluorocarbon silane, a hydrolyzed product of the fluorocarbon silane, or combinations thereof; a silicon-containing compound; and a surfactant. The coated product can comprise a substrate, an undercoat layer, and an emulsion layer.
Claims36
A product comprising a substantially aqueous emulsion, which comprises, or is produced by combining, a fluorocarbon silane or hydrolyzate thereof, a surfactant, and a silicon-containing compound wherein said fluorocarbon silane has the formula of Rf—(CH2)p—Si{—(O—CH2CH2)n—OR′}3, Rf is a C3-18 perfluoroalkyl group or combinations thereof, each R′ is independently a C1-3 alkyl groups or combinations thereof, p is 1 to 4, inclusive, and n is 2 to 10, inclusive;
- said surfactant has a HLB value greater than 12;
- and said silicon-containing compound is an aminosilane, an epoxysilane, a mercaptosilane, or combinations of two or more thereof.
A product comprising a substantially aqueous emulsion layer, which comprises, or is produced by combining, a fluorocarbon silane or hydrolyzate thereof, a surfactant, and a silicon-containing compound, and a layer comprising film-forming agent wherein said fluorocarbon silane has the formula of Rf—(CH2)p—Si{—(O—CH2CH2)n—OR′}3, Rf is a C3-18 perfluoroalkyl group or combinations thereof, each R′ is independently a C1-3 alkyl groups or combinations thereof, p is 1 to 4, inclusive, and n is 2 to 10, inclusive;
- and said film-forming agent is silicon dioxide, titanium dioxide, zirconium dioxide, organoalkoxysilane, polysilazane, or combinations of the two or more thereof.
A process comprising contacting a surfactant in water to produce a surfactant-water mixture;
- combining said surfactant-water mixture with a fluorocarbon silane to produce a silane-surfactant mixture;
- optionally adjusting the pH of said silane-surfactant mixture to produce a pH-adjusted mixture;
- combining said silane-surfactant mixture or said pH-adjusted mixture with a polymerizable silicon-containing compound to produce an emulsion;
- and applying said emulsion to a substrate wherein said surfactant has a HLB value greater 16;
- said fluorocarbon silane has the formula of Rf—(CH2)p—Si{—(O—CH2CH2)n—OR′}3, Rf is a C3-18 perfluoroalkyl group or combinations thereof, each R′ is independently a C1-3 alkyl groups or combinations thereof, p is 1 to 4, inclusive;
- said silicon-containing compound is a silicate, an organoalkoxysilane, an aminosilane, an epoxysilane, a mercaptosilane, or combinations of two or more thereof;
- said substrate having coated thereon an undercoat layer;
- and said undercoat layer comprises or is produced from at least one film-forming agent selected from the group consisting of silicon dioxide, titanium dioxide, zirconium dioxide, organoalkoxysilane, polysilazane, and combinations of two or more thereof.
A process comprising (1) contacting a substrate surface with at least one film-forming agent to produce an undercoated substrate having thereon an undercoat layer;
- (2) contacting said undercoated substrate with an emulsion wherein said undercoat layer comprises or is produced from at least one film-forming agent selected from the group consisting of silicon dioxide, titanium dioxide, zirconium dioxide, organoalkoxysilane, polysilazane, and combinations of two or more thereof;
- said emulsion comprises or is produced by combining, a fluorocarbon silane or hydrolyzate thereof, a surfactant, a silicon-containing compound;
- said fluorocarbon silane has the formula of Rf—(CH2)p—Si{—(O—CH2CH2)n—OR′}3, Rf is a C3-18 perfluoroalkyl group or combinations thereof, each R′ is independently a C1-3 alkyl groups or combinations thereof, p is 1 to 4, inclusive, and n is 2 to 10, inclusive;
- and said substrate is metal, glass, ceramic tile, brick, concrete, wood, masonry, fiber, leather, plastics, or stone.
A product comprising a substrate having thereon a substantially aqueous emulsion, and optionally at least one film-forming agent wherein said substrate is metal, glass, ceramic tile, brick, concrete, wood, mason , fiber, leather, plastics, or stone and said emulsion is the same as recited in claim 36, 33, or 34;
- and said film-forming agent is silicon dioxide, titanium dioxide, zirconium dioxide, organoalkoxysilane, polysilazane, or combinations of two or more thereof.
A product comprising a substantially aqueous emulsion, which comprises, or is produced by combining, a fluorocarbon silane or hydrolyzate thereof, a surfactant, and a mercaptosilane wherein said fluorocarbon silane has the formula of Rf—(CH2)p—Si{—(O—CH2CH2)n—OR′}3, Rf is a C3-18 perfluoroalkyl group or combinations thereof, each R′ is independently a C1-3 alkyl groups or combinations thereof, p is 1 to 4, inclusive, and n is 2 to 10, inclusive.
Dependencies are inferred from the claim text.