Hydrophilic coating composition and bath containing same
AssigneesNippon Paint Co., Ltd., Showa Aluminum Corporation
InventorsFujio Mikami, Kiyotada Yasuhara, Masahiro Kojima, Susumu Inoue
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Abstract
The hydrophilic coating composition including, on a solid basis, (a) 0.3-6 parts by weight of polyvinyl pyrrolidone having a polymerization degree of 10-1000; and (b) 1-10 parts by weight of polyvinyl alcohol having a saponification degree of 80% or more and a polymerization degree of 100-1000, a weight ratio of the component (a) to the component (b), (a)/[(a)+(b)], being in the range of 0.1-0.9.
Claims50
A hydrophilic coating composition comprising:
- by weight in an aqueous solution or dispersion,
- (a) 0.3-6 parts by weight of polyvinyl pyrrolidone having a polymerization degree of 10-1000;
- and
- (b) 1-10 parts by weight of polyvinyl alcohol having a saponification degree of 80% or more and a polymerization degree of 100-1000, a weight ratio of said component (a) to said component (b), (a)/[(a)+(b)], being in the range of 0.1-0.9.
A hydrophilic coating bath containing a hydrophilic coating composition in a concentration of 10-200 g/l, said hydrophilic coating composition comprising, by weight in an aqueous solution or dispersion,
- (a) 0.3-6 parts by weight of polyvinyl pyrrolidone having a polymerization degree of 10-1000;
- and
- (b) 1-10 parts by weight of polyvinyl alcohol having a saponification degree of 80% or more and a polymerization degree of 100-1000, a weight ratio of said component (a) to said component (b), (a)/[(a)+(b)], being in the range of 0.1-0.9.
Dependencies are inferred from the claim text.