JP2000265111A5 - - Google Patents

Claims (10)

(A) Urethane resin and / or acrylic resin, (B) curing agent, (C) silica particles, (D) polyethylene wax having an average particle size of 0.01 to 0.2 μm, (E) the following formula as a dispersant Containing the compound represented by (I) and water, wherein components (A) and (B) are each dissolved or dispersed in water, and components (C) and (D) are dispersed in water The component (E) is dissolved in water, and the ratio of the solid content of (A) + (B) is 50 to 95% by weight with respect to the total solid content of the components (A) to (E), (C ) Is 3 to 40% by weight, (D) + (E) is 2 to 20% by weight, and (A) / (B) is a solids weight ratio of 4/1 to 49/1 water-based surface treatment agent for metal materials characterized by the following:

[Wherein R ¹ represents an alkyl group having 1 to 20 carbon atoms or an alkenyl group having 2 to 20 carbon atoms, R ² represents (EO) _m- (PO) _n (wherein E represents an ethylene group, P represents a propylene group, m represents an integer of 5 to 20, n represents 0 or an integer of 1 to 10, R ³ represents a hydrogen atom or SO ₃ M (wherein M is a hydrogen atom, Represents an alkali metal ion or an ammonium ion), and R ⁴ represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkenyl group having 2 to 4 carbon atoms.   The aqueous surface treating agent for metal materials according to claim 1, wherein the ratio of the solid content of (E) to the solid content of (D) + (E) is 5 to 40% by weight.   The aqueous surface treating agent for metal materials according to claim 1 or 2, wherein the glass transition temperature of component (A) is in the range of -40 to 0 ° C.   Acrylic resin is (meth) acrylic acid and a monomer having an ethylenic double bond different from that, with the former being used in a ratio of 1 to 20 parts by weight with respect to 100 parts by weight of the total, The aqueous surface treating agent for a metal material according to any one of claims 1 to 3, which is a copolymer obtained by copolymerization.   Component (B) is an isocyanate compound, an aziridine compound, or an epoxy resin, The water-based surface treating agent for metal materials of any one of Claims 1-4.   The aqueous surface treating agent for metal materials according to any one of claims 1 to 4, wherein the component (B) is an epoxy resin having three or more epoxy groups in one molecule.   The aqueous surface treating agent for metal materials according to any one of claims 1 to 6, wherein the acid value of component (D) is in the range of 5 to 50.   Solid content concentration exists in the range of 5 to 50 weight%, The aqueous surface treating agent for metal materials of any one of Claims 1-7.   The water-based surface treatment agent for a metal material according to any one of claims 1 to 8, wherein the metal material is selected from a cold-rolled steel plate, a zinc-based plated steel plate, an aluminum-based plated steel plate, and an aluminum plate. It has 3-100 mg / m < ² > chromate film layer in conversion of metal chromium as the first layer on the surface of the metal material, and the water system for metal material according to any one of claims 1 to 9 as the second layer. A surface-treated metal plate having a resin film layer of 0.3 to 3.0 g / m ² formed by applying and drying a surface treatment agent.