Hydridoaminosilane treatment for rendering surfaces water-repellent
AssigneeUnion Carbide Corporation
InventorsBernard Kanner, Roswell E. King, III, Steven P. Hopper
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Abstract
Surfaces containing hydroxyl groups are rendered water-repellent through exposure to hydridoaminosilanes of the general formula H.sub.x Si(NRH).sub.y (NR.sub.2.sup.1).sub.3-y In particular, tris(dimethylamino)silane and its derivatives have been found to make substrates with hydroxyl-containing surfaces hydrophobic without adversely effecting the physical properties of the substrate being treated and without the necessity of and pre- or post-treatment steps (i.e. moisturizing, neutralizing, etc.).
Claims32
A method for rendering substrates containing surface hydroxyl groups water repellant which method comprises contacting said surfaces with a hydridoaminosilane of the formula:
- H.sub.x Si(NRH).sub.y (NR.sub.2.sup.1).sub.3-y
- wherein R is an alkyl group of the formula C.sub.n H.sub.2n+1 wherein n has a value of 1 to 18, R.sup.1 is an alkyl group of from 1 to 6 carbon atoms, x has a value of 0 to 3 and the sum of x+y=4.
A method for rendering substrates containing surface hydroxyl groups water repellant which method comprises contacting said substrate continuously through a substantially saturated vapor phase of a hydridoaminosilane of the formula:
- H.sub.x Si(NRH).sub.y (NR.sub.2.sup.1).sub.3-y
- wherein R is an alkyl group of the formula CnH.sub.2n+1 wherein n has a value of 1 to 11, R.sup.1 is an alkyl group of from 1 to 6 carbon atoms, x has a value of 0 to 3 and the sum of x+y=4.
A method for rendering substrates containing surface hydroxyl groups water repellant which method comprises contacting said substrate with a hydridoaminosilane dissolved in an inert solvent wherein said hydridoaminosilane is of the formula:
- H.sub.x Si(NRH).sub.y (NR.sub.2.sup.1).sub.3-y
- wherein R is an alkyl group of the formula C.sub.n H.sub.2n+1 wherein n has a value of 1 to 18, R.sup.1 is an alkyl group of from 1 to 6 carbon atoms, x has a value of 0 to 3 and the sum of x+y=4.
Dependencies are inferred from the claim text.