Process for depositing multiple coatings layers on a substrate

• US 7,959,981 B2
• Filed: 08/27/2007
• Issued: 06/14/2011
• Est. Priority Date: 08/27/2007
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Simpson, Dennis A., Sadvary, Richard J.
• Primary Examiner(s): CAMERON, ERMA C
• Application Number:
  US11/845,324
• Publication Number:
  US 20090061097A1
• Time in Patent Office: 1,387 Days
• Field of Search: 427/385.5, 427/372.2
• US Class Current: 427/407.1
• CPC Class Codes: B05D 2202/10 based on Fe
• CPC Class Codes: B05D 2601/00 Inorganic fillers
• CPC Class Codes: B05D 5/066 achieved by multilayers
• 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: B05D 7/572 all layers being cured or baked together

Abstract

A process for coating a substrate comprising (a) applying a solventborne primer coating composition onto at least a portion of the substrate; (b) applying a solventborne color containing coating composition onto at least a portion of the solventborne primer coating composition, wherein the solventborne color containing coating composition comprises a colorant and an insoluble microparticle; and (c) curing at least a portion of the solventborne primer coating composition and the solventborne color containing coating composition.

Claims

1. A method of coating a substrate comprising:

(a) applying a solventborne primer coating composition onto at least a portion of said substrate;

(b) applying a solventborne color containing coating composition onto at least a portion of said solventborne primer coating composition, wherein said solventborne color containing coating composition comprises a colorant and an insoluble microparticle and cellulose acetate butyrate; and

(c) curing at least a portion of said solventborne primer coating composition and said solventborne color containing coating composition.

2. The method according to claim 1, further comprising applying a substantially non-pigmented coating composition onto at least a portion of said solventborne color containing coating composition prior to step (c), and wherein step (c) further comprises curing said substantially non-pigmented coating composition.

3. The method according to claim 1, further comprising applying an electrodepositable coating composition onto at least a portion of said substrate prior to step (a).

4. The method according to claim 1, wherein said insoluble microparticle comprises 0.5% to 20% by weight based on the total resin solids of said solventborne color containing coating composition.

5. The method according to claim 1, wherein said insoluble microparticle comprises a fumed silica, a precipitated silica, a colloidal silica, a crosslinked microparticle, an aluminum oxide, or combinations thereof.

6. The method according to claim 5, wherein said crosslinked microparticle comprises a crosslinked polymeric microparticle.

7. The method according to claim 1, wherein said solventborne primer coating composition further comprises another insoluble microparticle, and wherein said another insoluble microparticle may be the same or different from said insoluble microparticle.

8. The method according to claim 7, wherein said another insoluble microparticle comprises 0.5% to 20% by weight based on the total resin solids of said solventborne primer coating composition.

9. The method according to claim 7, wherein said another insoluble microparticle comprises a fumed silica, a precipitated silica, a colloidal silica, a crosslinked microparticle, an aluminum oxide, or combinations thereof.

10. The method according to claim 1, wherein said solventborne color containing coating composition further comprises a polyester having reactive functional groups and a curing agent reactive with said reactive functional groups of said polyester.

11. The method according to claim 10, wherein said polyester is a reaction product of neopentyl glycol, trimethylol propane, adipic acid, and isophthalic acid.

13. The method according to claim 1, wherein said solventborne primer coating composition comprises a polyester having reactive functional groups and a curing agent reactive with said reactive functional groups of said polyester.

14. The method according to claim 13, wherein said polyester is a reaction product of neopentyl glycol, neopentyl glycol hydroxy pivalate, trimethylol propane, adipic acid, e-caprolactone, and isophthalic acid.

15. The method according to claim 13, wherein said curing agent is melamine.

16. The method according to claim 1, wherein said solventborne primer coating composition further comprises cellulose acetate butyrate.

17. The method according to claim 1, wherein said solventborne primer coating composition comprises a fast solvent.

12. The method according to clam 10, wherein said curing agent is an imino melamine.

18. A method of coating a substrate comprising:

(a) applying a solventborne primer coating composition onto at least a portion of said substrate;

(b) applying a solventborne color containing coating composition onto at least a portion of said solventborne primer coating composition, wherein said solventborne color containing coating composition comprises a colorant and an insoluble microparticle;

(c) applying a substantially non-pigmented coating composition onto at least a portion of said solventborne color containing coating composition; and

(d) curing at least a portion of said solventborne primer coating composition, said solventborne color containing coating composition, and said substantially non-pigmented coating composition;

wherein said solventborne primer composition and/or said solventborne color containing coating composition further comprises cellulose acetate butyrate.

19. A method of coating a substrate comprising:

(a) applying a solventborne primer coating composition onto at least a portion of said substrate, wherein said solventborne primer coating composition comprises cellulose acetate butyrate;

(b) applying a solventborne color containing coating composition onto at least a portion of said solventborne primer coating composition, wherein said solventborne color containing coating composition comprises a colorant and an insoluble microparticle; and

(c) curing at least a portion of said solventborne primer coating composition and said solventborne color containing coating composition.