Coating compositions exhibiting corrosion resistance properties and related coated substrates
AssigneePPG Industries Ohio, Inc.
InventorsDavid N. Walters, John R. Schneider
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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.
Claims19
A composition for use with a polyamine curing agent, the composition comprising:
- an epoxy functional material capable of being crosslinked by a polyamine curing agent;
- magnesium oxide particles having a calculated equivalent spherical diameter (D(nm)) of 50 nanometers to 200 nanometers, wherein the calculated equivalent spherical diameter (D(nm)) is determined according to the formula D(nm)=6000/[BET(m2/g)*ρ(g/cm3)], where BET represents surface area determined by nitrogen adsorption according to the ASTMD 3663-78 standard based on the Brunauer-Emmett-Teller method, and where p represents true density, and wherein the magnesium oxide particles act as a corrosion resisting material;
- one or more additional corrosion resisting particles, other than the magnesium oxide particles, wherein the one or more additional corrosion resisting particles comprise lithium;
- and
- particles comprising an oxide of titanium.
A composition for use with a polyamine curing agent, the composition comprising:
- an epoxy functional material capable of being crosslinked by a polyamine curing agent;
- magnesium oxide particles having a calculated equivalent spherical diameter (D(nm)) of 50 nanometers to 200 nanometers, wherein the calculated equivalent spherical diameter (D(nm)) is determined according to the formula D(nm)=6000/[BET(m2/g)*ρ(g/cm3)], where BET represents surface area determined by nitrogen adsorption according to the ASTMD 3663-78 standard based on the Brunauer-Emmett-Teller method, and where p represents true density, and wherein the magnesium oxide particles are present in the composition in an amount of 3 to 50 percent by volume, based on the total volume of the composition;
- particles comprising an oxide of iron or an oxide of titanium;
- and
- particles comprising a phosphate of a metal or a silicate of a metal.
Dependencies are inferred from the claim text.