Compositions comprising fluorinated silanes and compressed fluid CO2
Assignee3M Innovative Properties Company
InventorsCheryl L. S. Elsbernd, Michael S. Terrazas, Steven J. Martin, Mark J. Pellerite
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Abstract
The present invention provides composition for treating a substrate comprising a homogeneous mixture of: (a) a fluorinated silane of the formula: Rff1-[-Q-SiY3-xR1x]y (I) wherein Rf1 represents a monovalent or divalent perfluorinated group, Q represents an organic divalent linking group, R1 represents a C1-C4 alkyl group, Y represents a hydrolysable group; x is 0 or 1 and y is 1 or 2; (b) compressed fluid carbon dioxide; and (c) optionally an organic or inorganic acid. The invention further provides a method of making such a composition and the use thereof to treat substrates to render them oil and water repellent.
Claims16
Composition for treating a substrate comprising a homogeneous mixture of:
- (a) at least one fluorinated silane of the formula:
- Rf1-[-Q-SiY3-xR1x]y (I)
- wherein Rf1 represents a monovalent or divalent perfluorinated group,
- Q represents an organic divalent linking group, wherein the sum of the number of carbon atoms and the number of heteroatoms in Q is at least 3;
- R1 represents a C1-C4 alkyl group,
- Y represents a hydrolysable group;
- x is 0or 1 and y is 1 or 2;
- (b) compressed fluid carbon dioxide.
Dependencies are inferred from the claim text.