Water repellent surface treatment with integrated primer
AssigneePPG Industries, Inc.
InventorGeorge B. Goodwin
Life of this patent
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Abstract
A composition comprising perfluoroalkylalkylsilane and a completely hydrolyzable silane or siloxane is disclosed for providing nonwetting properties to the surface of various substrates such as glass, plastic, metal, organic polymer coated substrates or inorganic coated substrates. The nonwetting property, as measured by contact angle of a drop of water on the treated substrate surface, is more durable than the nonwetting property of a surface treated with the same perfluoroalkylalkylsilane with the hydrolyzable silane or siloxane.
Claims20
A composition for producing a water repellent surface on a substrate comprising a mixture of:
- a perfluoroalkylalkylsilane selected from compounds having the general formula R.sub.m R'.sub.n SiX.sub.4-m-n, wherein R is a perfluoroalkylalkyl radical, R' is a vinyl or an alkyl radical, m is 1, 2 or 3, n is 0, 1 or 2 and m+n is less than 4, and X is selected from the group consisting of halogen and acyloxy radicals, and
- a compound selected from the group consisting of silanes and siloxanes capable of hydrolysis to a silica gel.
A composition for producing a water repellent surface on a substrate comprising a mixture of:
- a perfluoroalkylalkylsilane selected from compounds having the general formula R.sub.m R'.sub.n SiX.sub.4-m-n, wherein R is a perfluoroalkylalkyl radical, R' is a vinyl or an alkyl radical, m is 1, 2 or 3, n is 0, 1 or 2 and m+n is less than 4, and X is selected from the group consisting of halogen, alkoxy and acyloxy radicals, and
- a silane capable of hydrolysis to a silica gel, wherein said silane has the general formula SiX.sub.4, wherein X is halogen.
A composition for producing a water repellent surface on a substrate comprising a mixture of:
- a perfluoroalkylalkylsilane selected from compounds having the general formula R.sub.m R'.sub.n SiX.sub.4-m-n, wherein R is a perfluoroalkylalkyl radical, R' is a vinyl or an alkyl radical, m is 1, 2 or 3, n is 0, 1 or 2 and m+n is less than 4, and X is selected from the group consisting of halogen, alkoxy and acyloxy radicals;
- a compound selected from the group consisting of silanes and siloxanes wherein the silanes and siloxanes are capable of hydrolysis to a silica gel, and
- a fluorinated olefin telomer having the general formula C.sub.m F.sub.2m+1 CH.dbd.CH.sub.2 where m is from 1 to 30.
Dependencies are inferred from the claim text.