COATING COMPOSITIONS EXHIBITING CORROSION RESISTANCE PROPERTIES, RELATED COATED SUBSTRATES, AND METHODS
First Claim
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1. A primer and/or pretreatment coating composition comprising:
- (a) an adhesion promoting component; and
(b) corrosion resisting particles comprising chemically modified particles having an average primary particle size of no more than 500 nanometers.
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Abstract
Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.
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Citations
18 Claims
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1. A primer and/or pretreatment coating composition comprising:
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(a) an adhesion promoting component; and
(b) corrosion resisting particles comprising chemically modified particles having an average primary particle size of no more than 500 nanometers. - View Dependent Claims (2, 3, 9, 10, 11, 12, 13, 14, 15, 16)
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4-8. -8. (canceled)
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17. A method for improving the corrosion resistance properties of a primer and/or pretreatment coating composition, comprising including in the composition corrosion resisting particles comprising chemically modified particles having an average primary particle size of no more than 500 nanometers, such that the corrosion resisting particles are present in the composition in an amount sufficient to result in a composition that, when deposited onto at least a portion of one metal substrate selected from cold rolled steel, electrogalvanized steel and aluminum and cured, provides a substrate that exhibits corrosion resistance properties at least similar to the corrosion resistance properties that the same substrate exhibits when at least partially coated under the same conditions with a conventional chrome-containing corrosion-resistant composition.
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18. A method for enhancing the corrosion resistance of a metal substrate, comprising coating at least a portion of a bare metal substrate with a primer and/or pretreatment coating composition that comprises:
- (a) an adhesion promoting component, and (b) corrosion resisting particles comprising chemically modified particles having an average primary particle size of no more than 500 nanometers.
Specification