Claims
- 1. A matt epoxide powder coating comprising an epoxy resin comprising 3 to 12% by weight of a salt of pyromellitic acid which comprises 1 mol of pyromellitic acid and 0.5-2 mol of a guanidine of the formula: ##STR5## wherein R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4, identical or different, are each a radical selected from the group consisting of hydrogen, C.sub.1-8 alkyl, C.sub.3-8 cycloalkyl and C.sub.6-8 aromatic hydrocarbon residues, or R.sup.1 and R.sup.2 and R.sup.3 and R.sup.4 may jointly form a ring containing 3 to 8 carbon atoms in which one of the carbon atoms may be replaced with an oxygen atom.
- 2. The matt epoxide powder of claim 1, wherein said resin comprises 4 to 7% by weight of said salt of pyromellitic acid.
- 3. A matt hybrid powder coating comprising an epoxy resin comprising
- (i) 0.5-12% by weight of a salt of pyromellitic acid comprising 1 mol of pyromellitic acid and 0.5-2 mol of a guanidine of the formula: ##STR6## wherein R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4, identical or different, are each a radical selected from the group consisting of hydrogen, C.sub.1-8 alkyl, C.sub.3-8 cycloalkyl and C.sub.6-8 aromatic hydrocarbon residues, or R.sup.1 and R.sup.2 and R.sup.3 and R.sup.4 may jointly form a ring which may contain an oxygen atom;
- (ii) a COOH-containing polyester; and
- (iii) optionally, an isophorone diisocyanate adduct blocked with .epsilon.-caprolactam.
- 4. The matt hybrid powder coating of claim 3, wherein said epoxide resin comprises 1 to 7% by weight of said salt of pyromellitic acid.
- 5. The matt hybrid powder coating of claim 4, wherein said epoxide resin comprises 2.0 to 5.5% by weight of said salt of pyromellitic acid.
Priority Claims (1)
Number |
Date |
Country |
Kind |
44 00 931.3 |
Jan 1994 |
DEX |
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Parent Case Info
This is a Division of application Ser. No. 08/365,422 filed on Dec. 28, 1994 now U.S. Pat. No. 5,556,937.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
5449528 |
Gras et al. |
Sep 1995 |
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5494994 |
Gras et al. |
Feb 1996 |
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5506334 |
Gras et al. |
Apr 1996 |
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Divisions (1)
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Number |
Date |
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Parent |
365422 |
Dec 1994 |
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