Silicone coatings

Abstract

Coating compositions including about 50-80% by weight of a water-based silicone elastomer composition, about 0.5-4.0% by weight of a silane adhesion promoter, about 0.02-0.5% by weight of a silicone surfactant, and about 10-50% by weight water are disclosed herein. Also included are methods of preparing the coating compositions and methods of using the coating compositions.

What is claimed is: 
     
         1 . A coating composition comprising:
 (i) about 50-80 wt % of a water-based silicone elastomer composition;   (ii) about 0.5-4.0 wt % of a silane adhesion promoter;   (iii) about 0.02-0.5 wt % of a silicone surfactant; and   (iv) about 10-50 wt % water.   
     
     
         2 . The coating composition of  claim 1 , wherein the water-based silicone elastomer composition comprises a crosslinked product of a hydroxy-terminated polydimethylsiloxane polymer with dimethyl methyl((diethylamino)oxy)siloxane. 
     
     
         3 . The coating composition of  claim 2 , wherein the water-based silicone elastomer composition further comprises water, a cyclic siloxane, a non-ionic surfactant, calcium carbonate, titanium dioxide, and silicone dioxide. 
     
     
         4 . The coating composition of  claim 2 , wherein the non-ionic surfactant is 2,6,8-trimethyl-4-nonyloxypolyethyleneoxyethanol. 
     
     
         5 . The coating composition of  claim 1 , wherein the composition comprises the water-based silicone elastomer composition in an amount of 65-75 wt %. 
     
     
         6 . The coating composition of  claim 1 , wherein the silane adhesion promoter is γ-glycidoxypropyltrimethoxysilane. 
     
     
         7 . The coating composition of  claim 1 , wherein the composition comprises the silane adhesion promoter in an amount of 0.50-1.0 wt %. 
     
     
         8 . The coating composition of  claim 1 , wherein the silicone surfactant is 3-(polyoxyethylene)propylheptamethyltrisiloxane. 
     
     
         9 . The coating composition of  claim 1 , wherein the composition comprises the silicone surfactant in an amount of 0.020-0.050 wt %. 
     
     
         10 . The coating composition of  claim 1 , further comprising a pH-adjuster, a filler, a pigment, or any combination thereof. 
     
     
         11 . The coating composition of  claim 1 , wherein the coating composition is substantially free of acrylic materials. 
     
     
         12 . The coating composition of  claim 1 , wherein the coating can adhere to a surface of a silicone rubber substrate.