Coating composition for a metal, and metal material having a coating of such coating composition

• US 20080063892A1
• Filed: 09/07/2007
• Published: 03/13/2008
• Est. Priority Date: 09/08/2006
• Status: Active Grant

• Current Assignee: Nissin Chemical Industry Co., Ltd. (Shin-Etsu Chemical Company Limited)
• Original Assignee: Nissin Chemical Industry Co., Ltd. (Shin-Etsu Chemical Company Limited)
• Inventors: Shinohara, Shuichiro, Nakamura, Norio, Mizusaki, Toru
• Granted Patent: US 7,985,486 B2
• Time in Patent Office: Days
• US Class Current: 428/626
• CPC Class Codes: B05D 2202/15 Stainless steel
• CPC Class Codes: B05D 5/00 Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
• CPC Class Codes: B05D 7/14 to metal, e.g. car bodies involving a chemical reaction between the metal and the coating C23
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C08L 71/02 Polyalkylene oxides
• CPC Class Codes: C09D 171/02 Polyalkylene oxides
• CPC Class Codes: C09D 201/00 Coating compositions based on unspecified macromolecular compounds
• CPC Class Codes: Y10T 428/12569 Synthetic resin
• CPC Class Codes: Y10T 428/263 Coating layer not in excess of 5 mils thick or equivalent
• CPC Class Codes: Y10T 428/31529 Next to metal
• CPC Class Codes: Y10T 428/31605 Next to free metal
• CPC Class Codes: Y10T 428/31678 Of metal
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers

Abstract

A coating composition for a metal is provided. The coating composition comprises a coating composition for a metal comprising a synthetic resin solid content (A); a filler (B); and a mixture of (C-1) acetylene glycol represented by the following general formula (1):
and/or an ethoxylated derivative of the acetylene glycol represented by the following general formula (2): and (C-2) at least one member selected from polyoxy(ethylene-propylene) block polymer represented by the following formula (3):
HO(C₂H₄O)_w(C₃H₆O)_x(C₂H₄O)_y(C₃H₆O)_zH   (3).

Claims

1. A coating composition for a metal comprising parts by weight of a synthetic resin solid content (A);

1 to 200 parts by weight of a filler (B); and

0.01 to 10 parts by weight of a mixture of

(C-1) 10 to 95% by weight of acetylene glycol represented by the following general formula (1);

and/or an ethoxylated derivative of the acetylene glycol represented by the following general formula (2);

wherein m and n are respectively a positive number, and m+n is 2 to 30;

(C-2) 5 to 90% by weight of at least one member selected from polyoxy(ethylene-propylene) block polymers represented by the following formula (3);

HO(C₂H₄O)_w(C₃H₆O)_x(C₂H₄O)_y(C₃H₆O)_zH  

 

(3)

wherein w, x, y, and z are respectively 0 or a positive number with the proviso that w+x+y+z>

0, the block polymer having a weight average molecular weight of 1,500 to 10,000, an ethylene oxide content of 35 to 90% by weight, and a propylene oxide content of 10 to 65% by weight; and

(C-3) 0 to 25% by weight of at least one member selected from water, a water soluble organic solvent, and an acetylene glycol or ethoxylated derivative thereof other than those of the formulae (1) and (2).

2. A coating composition for a metal according to claim 1 wherein the component (A) is at least one member selected from (meth)acrylate resin emulsion, styrene-acrylate copolymer emulsion, vinyl acetate resin emulsion, vinyl acetate-(meth)acrylate copolymer emulsion, urethane resin emulsion, ethylene-vinyl acetate copolymer emulsion, polyester resin, and aqueous epoxy resin.

3. A coating composition for a metal according to claim 1 wherein the component (B) is at least one member selected from titanium, talc, kaolin, bentonite, mica, silica, heavy calcium carbonate, clay, precipitated barium sulfate, carbonic acid barium, glass beads, and resin beads.

4. A coating composition for a metal according to claim 1 wherein the component (C-1) has a sodium content of up to 1,000 ppm.

5. A coating composition for a metal according to claim 1 wherein the metal on which the coating composition is applied is iron, steel, copper, or aluminum.

6. A metal material having a coating of the coating composition of claim 1.