Claims
- 1. A powder coating dispersion comprising a binder, a crosslinking agent, oxalic acid, and, optionally, a polyvalent inorganic acid, wherein at least one of:I) a) the binder comprises at least one epoxide-containing binder containing, based on the binder, from 0.5 to 40% by weight of at least one copolymerized glycidyl-containing monomer, and b) the crosslinking agent comprises at least one tris(alkoxycarbonylamino)triazine and at least one polycarboxylic acid; and/or II) a) the crosslinking agent comprises at least one tris(alkoxycarbonylamino) triazine and at least one epoxide-containing crosslinking agent containing, based on the crosslinking agent, from 0.5 to 40% by weight of at least one copolymerized glycidyl-containing monomer, wherein the epoxide-containing crosslinking agent is at least one of oligomeric and polymeric, and b) the binder comprises at least one carboxyl-containing polymer.
- 2. The powder coating dispersion of claim 1, wherein the oxalic acid and the polyvalent inorganic acid are present in the powder coating dispersion.
- 3. The powder coating dispersion of claim 1, wherein the polyvalent inorganic acid is present in the powder coating dispersion in an amount from 0.1 to 2,000 ppm per entire weight of the powder coating dispersion.
- 4. The powder coating dispersion of claim 1, wherein the polyvalent acid is selected from the group consisting of phosphoric acid, derivatives of phosphoric acid, sulfuric acid, derivatives of sulfuric acid, boric acid, and mixtures thereof.
- 5. The powder coating dispersion of claim 1, wherein the polyvalent inorganic acid comprises phosphoric acid.
- 6. A process for producing single-coat or multi-coat clearcoat finishes on a primed or an unprimed substrate comprising applying at least one powder coating dispersion of claim 1 to the substrate to form at least one film, and then curing the at least one film by at least one of thermally and/or with actinic radiation.
- 7. The process of claim 6, wherein the primed substrate is coated with at least one basecoat film.
- 8. The process of claim 7, wherein the at least one basecoat film includes at least one of a polyvalent inorganic acid and/or oxalic acid.
- 9. A method comprising:a. adding oxalic acid and, optionally, a polyvalent inorganic acid to a powder coating dispersion comprising a binder and a crosslinking agent; and b. mixing the powder coating dispersion, wherein at least one of: I) a) the binder comprises at least one epoxide-containing binder containing, based on the binder, from 0.5 to 40% by weight of at least one copolymerized glycidyl-containing monomer, and b) the crosslinking agent comprises at least one tris(alkoxycarbonylamino)triazine and at least one polycarboxylic acid; and/or II) a) the crosslinking agent comprises at least one tris(alkoxycarbonylamino)triazine and at least one epoxide-containing crosslinking agent containing, based on the crosslinking agent, from 0.5 to 40% by weight of at least one copolymerized glycidyl-containing monomer, wherein the epoxide-containing crosslinking agent is at least one of oligomeric and polymeric, and b) the binder comprises at least one carboxyl-containing polymer.
- 10. The method of claim 9, wherein the oxalic acid and the polyvalent inorganic acid are added to the powder coating dispersion.
- 11. The method of claim 9, wherein the polyvalent inorganic acid is added to the powder coating dispersion in an amount from 0.1 to 2,000 ppm per entire weight of the powder coating dispersion.
- 12. The method of claim 9, wherein the polyvalent acid is selected from the group consisting of phosphoric acid, derivatives of phosphoric acid, sulfuric acid, derivatives of sulfuric acid, boric acid, and mixtures thereof.
- 13. The method of claim 9, wherein the polyvalent inorganic acid comprises phosphoric acid.
Priority Claims (1)
Number |
Date |
Country |
Kind |
199 20 1412 |
May 1999 |
DE |
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CROSS-REFERENCE TO RELATED APPLICATIONS
The present application is a continuation of U.S. Ser. No. 09/959,067 filed on Oct. 16, 2001, now U.S. Pat. No. 6,509,096, which is a 371 of PCT/EP/00/03276 filed on Apr. 12, 2000, which claims priority to DE 199 20 141.2 filed on May 3, 1999, both of which are incorporated herein by reference.
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Continuations (1)
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Number |
Date |
Country |
Parent |
09/959067 |
|
US |
Child |
10/273189 |
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US |