POLYESTER AND POLYAMIDE ADHESION IMPROVERS
First Claim
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2. The method according to claim 1 wherein starch phosphate is applied to said wet pre-paint conversion coating.
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Abstract
Prior to applying an alkyd paint to a metallic surface or to a pre-paint coating covering a metallic surface, there is applied to said surface or said coating a polyester or a polyamide for the purpose of improving the adhesion of said paint. The polyester or polyamide can be applied from an aqueous rinse solution or from a final rinse solution.
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Citations
11 Claims
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2. The method according to claim 1 wherein starch phosphate is applied to said wet pre-paint conversion coating.
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3. The method according to claim 1 wherein said wet pre-paint conversion coating is rinsed with an aqueous solution containing said polyester or said polyamide.
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4. The method according to claim 3 wherein said aqueous solution is a final rinse solution.
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5. A method for coating a metallic surface comprising:
- A applying to a metallic surface a pre-paint coating-forming solution which forms on said surface a prepaint conversion coating;
B applying to said pre-paint conversion coating while wet a water soluble or colloidally dispersible polyester or polyamide adhesion improver, wherein said adhesion improver is applied from a water rinse which is applied to said pre-paint conversion coating to remove therefrom excess or spent pre-paint coating solution or from a final rinse solution after said pre-paint conversion coating has been water rinsed to remove therefrom excess or spent pre-paint coating solution; and
C thereafter applying an alkyd paint to the pre-paint conversion coating having thereon said adhesion improver;
wherein the amount of adhesion improver applied is sufficient to improve the bond between the paint film formed from said alkyd paint and said pre-paint conversion coating.
- A applying to a metallic surface a pre-paint coating-forming solution which forms on said surface a prepaint conversion coating;
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6. The method according to claim 5 wherein said adhesion improver is starch phosphate and wherein it is applied to said pre-paint conversion coating by rinsing it with an aqueous solution containing said starch phosphate.
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7. A method for coating a metallic surface comprising:
- A applying a pre-paint conversion coating to said metallic surface;
B applying an aqueous solution containing starch phosphate to said pre-paint conversion coating; and
C applying an alkyd paint to said pre-paint conversion coating having thereon starch phosphate;
wherein the amount of starch phosphate on said pre-paint conversion coating is at least sufficient to improve the bond between said conversion coating and the paint film formed from said alkyd paint.
- A applying a pre-paint conversion coating to said metallic surface;
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8. A method according to claim 7 wherein said pre-paint conversion coating is a zinc phosphate coating.
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9. A metallic surface coated according to the method of claim 1.
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10. A metallic surface coated according to the method of claim 5.
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11. A metallic surface coated according to the method of claim 7.
Specification