Claims
- 1. A powdered coating composition providing a light color wrinkled finish, said composition comprising:
- an epoxy resin,
- a catalyst,
- a curing agent selected from the group consisting of methylenedisalicylic acid and other than methylenedisalicylic acid having a structure in general accordance with the formula ##STR5## wherein each R.sub.1 is selected from the group consisting of H, C.sub.1 -C.sub.20 alkyl groups, C.sub.6 -C.sub.10 aryl groups and aryl substituted methylene groups and wherein each R.sub.2 is selected from the group consisting of H, C.sub.1 -C.sub.20 alkyl groups, C.sub.6 -C.sub.10 aryl groups and aryl substituted methylene groups, and
- a color stabilizer comprising at least one compound selected from the group consisting of hindered phenolic compounds, divalent sulfur compounds, trivalent phosphorous compounds and metal chelators, said color stabilizer present at a level between about 0.1 and about 5 phr and effective to avoid a red color shift .increment.a of more than about 1.5 upon cure of said composition, as compared to the same composition which has been fused but not cured.
- 2. The powdered coating composition of claim 1 wherein said color stabilizer is effective to avoid a red color shift .increment.a of more than about 1 upon cure of said composition, as compared to the same composition which has been fused but not cured.
- 3. The powdered coating composition of claim 1 wherein said color stabilizer comprises a hindered phenol.
- 4. The powdered coating composition of claim 3 wherein said color stabilizer additionally comprises a compound selected from the group consisting of: divalent sulfur compounds, trivalent phosphorous compounds and metal chelators.
- 5. The powdered coating composition of claim 1 wherein said curing agent comprises methylenedisalicylic acid.
- 6. The powdered coating composition of claim 1 wherein said curing agent comprises a compound other than methylenedisalicylic acid, and has a structure in general accordance with the formula ##STR6## wherein each R.sub.1 is selected from the group consisting of H, C.sub.1 -C.sub.20 alkyl groups, C.sub.6 -C.sub.10 aryl groups and aryl substituted methylene groups and wherein each R.sub.2 is selected from the group consisting of H, C.sub.1 -C.sub.20 alkyl groups, C.sub.6 -C.sub.10 aryl groups and aryl substituted methylene groups.
- 7. The powdered coating composition of claim 6 wherein the curing agent comprises methylenebis(3-methylsalicylic acid).
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of application, U.S. Ser. No. 08/650,081, filed on May 17, 1996, now U.S. Pat. No. 5,688,878. The co-pending parent application is hereby incorporated by reference herein and is made a part hereof, including but not limited to those portions which specifically appear hereinafter.
US Referenced Citations (39)
Foreign Referenced Citations (4)
Number |
Date |
Country |
A0195660 |
Sep 1986 |
EPX |
57-159862 |
Oct 1982 |
JPX |
03-208844 |
Sep 1991 |
JPX |
5271577 |
Oct 1993 |
JPX |
Non-Patent Literature Citations (4)
Entry |
CA Selects: Coatings, Inks, & Related Products. Issue 22, 1993, p. 7 119: 182962w. |
Research Disclosure: Jul. 1993 No. 351 457-459. |
Modern Paint and Coatings, Oct. 1980, pp. 88-92 (Formulation Techniques Using Triflic Acid Salts). |
Journal of Paint Technology, vol. 44, No. 565, Feb. 1972 (Powder Coating: Why - How - When). |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
650081 |
May 1996 |
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