Hydrophilic surface-treating aqueous solution and hydrophilic surface-treating method using polyglutamic acid
AssigneeNippon Paint Co., Ltd.
InventorsMasahiko Matsukawa, Hidekimi Hirasawa, Fujio Mikami, Katsuyoshi Yamasoe
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Abstract
A hydrophilic surface-treating aqueous solution and a hydrophilic surface-treating method are provided to form a film which can maintain its hydrophilicity. The hydrophilic surface-treating aqueous solution contains as main components polyglutamic acid, basic compound, and aqueous resin if necessary. This surface-treating solution and method enable the forming of a film on the surface of aluminum series metals which are used for aluminum fins of heat exchangers, and confer the film's anticorrosion properties, superior hydrophilicity and high hydrophilic permanency, while remarkably suppressing an offensive odor.
Claims19
A hydrophilic surface-treating film-forming aqueous solution which is able to form a hydrophilic film when applied to an aluminum or aluminum alloy surface, which hydrophilic surface-treating film forming aqueous solution comprises as its main components polyglutamic acid having a weight-average molecular weight of 10,000 to 2,000,000, a basic compound, and an aqueous resin in addition to said polyglutamic acid, the amount of said basic compound being that which neutralizes 10 to 200% of said polyglutamic acid, wherein said aqueous solution further contains an unsaturated polymerizable monomer.
Dependencies are inferred from the claim text.