Patent ID: 6447845
Filing Date: 2002-09-10
Classification: C08F,C08J,C09D,Y10T

Abstract:
A process for the preparation of a barrier coating comprising the steps of:applying an organic acid to a substrate to form a layer, and drying the layer; wherein the organic acid has at least two acid groups and is selected from the group consisting of a graft polymer, a polybasic carboxylic acid, a polymer of an unsaturated carboxylic acid, and a co-polymer of an unsaturated carboxylic acid, and the organic acid is mixed with one or more components selected from the group consisting of: i) a compound of the formula RaX3âˆ’aSi(CH2)nY wherein each R is selected from the group consisting of a hydrogen atom and a hydrocarbon group with 1 to 10 carbon atoms; each X is selected from the group consisting of an alkoxy group with 1 to 4 carbon atoms, a halogen atom, an oxime group, and an acyloxy group; Y is selected from the group consisting of an epoxy group, a methacryloxy group, an acryloxy group, â€”NH2, and â€”NHâ€”(CH2)bNH2; a is from 0 to 3; n is an integer from 1 to 12; and b is an integer from 1 to 6; ii) a condensation catalyst; iii) a solvent selected from the group consisting of an alcohol, an ether, an ester, a hydrocarbon, and water; and iv) a filler selected from the group consisting of silicone resins, silica, magnesium oxide, clay, diatomaceous earth, calcium carbonate, finely ground quartz, and layered silicates.