Claims
- 1. A coating composition for application to and curing on a steel substrate to provide a drawable and corrosion resistant dry film protecting the steel substrate, comprising: a finely divided metal of a group consisting essentially of zinc, aluminum, magnesium, cadmium, stainless steel, copper, nickel and alloys and blends thereof; said finely divided metal having an average particle size not greater than about 60 microns and a maximum individual particle size not greater than 100 microns; a resin system at least 50% by weight consisting essentially of primary resin, the quantity of said resin system being about 10% to 525% by weight of said powdered metal and said resin system having the property of curing to a dry film within 50 minutes on a steel substrate at a maximum temperature not greater than 500% F.; a drawable polymeric component consisting essentially of a quantity of a tetrafluorethylene polymer in the form of solid particles equal to at least 1% total solids by weight and which is dispensed as solid particles in the dry film; an active organic solvent and a total quantity of all solvents being sufficient for the composition to have a viscosity in the range of 20 to 280 seconds in a Ford No. 4 cup.
- 2. The coating composition of claim 1 which also comprises a quantity of a secondary resin equal to about 1% to 50% by weight of said primary bonding resin, said secondary resin comprising at least one of the resins of phenolic, resole, triazine, melamine-formaldehyde, amino, urea-formaldehyde, titanates, ketimines, hexomethoxymethyl-melamine and benzoguanamine resins.
- 3. The coating composition of claim 1 which also comprises a quantity of a secondary resin equal to about 1% to 50% by weight of said primary bonding resin, said secondary resin consisting essentially of phenolic, resole, triazine, melamine-formaldehyde, amino, urea-formaldehyde, titanates, ketimines, hexomethoxymethyl-melamine, and benzoguanamine resins.
- 4. The coating composition of claim 1 wherein said primary bonding resin comprises at least one of the resin of the family of epoxy, phenoxy, alkyd, vinylidene chloride, vinyl alkyd, polyester, isocyanate or acrylic.
- 5. The coating composition of claim 1 wherein said primary bonding resin consists of resins of the family of epoxy, phenoxy, alkyd, vinylidene chloride, vinyl alkyd, isocyanate and acrylic.
- 6. The coating composition of claim 5 which also comprises a quantity of thixotropic agent equal to about 0.4% to 12% by weight of said finely divided metal.
- 7. The coating composition of claim 6 which also comprises a quantity of a suspension agent equal to about 0.2% to 5% by weight of said finely divided metal.
- 8. The coating composition of claim 6 which also comprises a quantiy of a hygroscopic agent equal to about 0.2% to 12% by weight of said finely divided metal.
- 9. The coating composition of claim 1 which also comprises a quantity of thixotropic agent equal to about 0.4% to 12% by weight of said finely divided metal.
- 10. The coating composition of claim 1 which also comprises a quantity of a suspension agent equal to about 0.2% to 5% by weight of said finely divided metal.
- 11. The coating composition of claim 1 which also comprises a quantity of a hygroscopic agent equal to about 0.2% to 12% by weight of said finely divided metal.
- 12. The coating composition of claim 1 wherein said active solvents comprise acetone, cellosolve acetate, methyl ethyl ketone, methyl isobutyl ketone, dimethyl-formamide, xylene, toluene, dibasic ester, naphtha, propylene glycol and blends thereof.
- 13. The coating composition of claim 1 which also comprises an inactive organic solvent selected from a group comprising aromatic hydrocarbons, alcohols and blends thereof in a quantity equal to about 10% to 40% by weight of organic solvents.
- 14. The coating composition of claim 1 wherein said organic solvents comprise a quantity equal to about 20% to 300% by weight of all of said resins.
- 15. The coating composition of claim 1, wherein said coating is for application to and curing on a metal substrate having been pretreated with a conversion coating.
- 16. The conversion coating of claim 15, which comprises at least one selected from the group of phosphate, chromate and oxide coatings.
- 17. A coating composition for application to and curing on a steel substrate to provide a drawable and corrosion resistant film protecting the steel substrate, comprising: a finely divided metal of a group consisting essentially of zinc, aluminum, magnesium, cadmium, stainless steel, copper, nickel and alloys and blends thereof; said finely divided metal having an average particle size not greater than about 60 microns and a maximum individual particle size not greater than 100 microns; a resin system at least 50% by weight consisting essentially of primary resin of a group of the family of epozy, phenoxy, alkyd, saran, vinyl alkyd, polyester, isocyanate and acrylic resins; the quantity of said resin system being about 10% to 525% by weight of said finely divided metal and said resin system having the property of curing to a dry film within 50 minutes on a substrate having a maximum temperature not greater than 500.degree. F.; a drawable polymeric component consisting essentially of a quantity of a tetrafluoroethylene polymer in the form of solid particles equal to at least 5% of the total solids of the composition by weight and which is dispersed as solid particles in the dry film; an active organic solvent and a total quantity of all solvents being sufficient for the composition to have a viscosity in the range of 20 to 280 seconds in a Ford No. 4 cup.
- 18. A coating composition for application to and curing on a steel substrate to provide a drawable and corrosion resistant dry film protecting the steel substrate, comprising: a finely divided metal of a group consisting essentially of zinc, aluminum, magnesium, cadmium, stainless steel, copper, nickel and alloys and blends thereof; said finely divided metal having an average particle size not greater than about 60 microns and a maximum individual particle size not greater than 100 microns; a resin system at least 50% by weight consisting essentially of primary resin, the quantity of said resin system being about 10% to 525% by weight of said powdered metal and said resin system having the property of curing to a dry film within 50 minutes on a steel substrate at a maximum temperature not greater than 500.degree. F.; a drawable polymeric component consisting essentially of a quantity of a tetrafluorethylene polymer in the form of solid particles equal to at least 1% total solids by weight and which is dispensed as solid particles in the dry film; an active organic solvent and a total quantity of all solvents being sufficient for the composition to have a viscosity in the range of 20 to 280 seconds in a Ford No. 4 cup; and the composition has all four properties of curing to a dry film on a steel substrate at a temperature of not greater than 500.degree. F., adhering to the steel substrate during cold forming thereof, having sufficient lubricity to enable deep draw cold forming of the steel substrate without using an additional die lubricant, and after cold forming of the steel substrate providing salt spray corrosion resistance of at least 240 hours with a 5% neutral salt spray at room temperature.
Parent Case Info
This is a continuation of application Ser. No. 07/729,637, filed on Aug. 8, 1988 now abandoned as a continuation of application Ser. No. 07/004,677 filed on Jan. 20, 1987 and now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
8202393 |
Jul 1982 |
WOX |
Continuations (1)
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Number |
Date |
Country |
Parent |
4677 |
Jan 1987 |
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