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US 4,786,546 AGranted
Two layer polyvinyl fluoride coatings and process for applying it
AssigneeE. I. Du Pont de Nemours and Company
InventorEustathios Vassiliou
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AssigneeE. I. Du Pont de Nemours and Company
InventorEustathios Vassiliou
Estimating the term…
A composite comprising a substrate, a primer layer and a topcoat layer is disclosed. The primer comprises 20-40 weight percent of an acrylic copolymer containing 1-20 weight percent repeating units of the structure ##STR1## where n is 1-6, --R is --H or --CH.sub.3, R' is --H, --CH.sub.3 or --(CH.sub.2).sub.m CH.sub.3 where m is 1-5, and --R" is --H, --CH.sub.3 or --(CH.sub.2).sub.x CH.sub.3 where x is 1-5, from 65-99 weight percent repeating units of the structure ##STR2## where --R"' is --H, --CH.sub.3 or --(CH.sub.2).sub.y --CH.sub.3 where y is 1-17 and up to 15 weight percent repeating units of the structure ##STR3## and 80-60 weight percent polyvinyl fluoride. The topcoat is polyvinyl fluoride. The primer layer is 0.1-0.5 mil in thickness and the topcoat is 0.1-30 mils in thickness. The coatings are applied wet on wet and then baked.
A composite comprising a substrate, intimately adhered to said substrate a layer from 0.1-0.5 mil in thickness of a polymeric composition comprising 20-40 weight percent of an acrylic copolymer containing 1-20 weight percent repeating units of the structure ##STR6## where n is 1-6, --R is --H or --CH.sub.3, --R' is --H, --CH.sub.3 or --(CH.sub.2).sub.m --CH.sub.3 where m is 1-5, and --R" is --H, --CH.sub.3 or (CH.sub.2).sub.x CH.sub.3 where x is 1-5, 65-99 weight percent repeating units of the structure ##STR7## where R"' is --H, --CH.sub.3 or --(CH.sub.2).sub.y CH.sub.3 where y is 1-17 and 0-15 weight percent repeating units of the structure ##STR8## and 80-60 weight percent of polyvinyl fluoride having topcoat from 0.1-30 mils in thickness which consists essentially of polyvinyl fluoride.
Dependencies are inferred from the claim text.