Coatings of arylene sulfide polymers
AssigneePhillips Petroleum Company
InventorsLyle R. Kallenbach, Michael C. Yu
Life of this patent
Estimating the term…
Abstract
Improved coatings derived from arylene sulfide polymers are provided by use of powered or liquid slurry coating formulations comprising a metal oxide and an arylene sulfide polymer which has an extrusion rate of about 80 to about 400 grams/10 minutes.
Claims23
A method of coating at least one surface of a substrate selected from the group consisting of an iron-containing alloy, a magnesium-containing alloy, aluminum, glass and ceramic comprising the steps of:
- (a) providing a clean substrate surface having a temperature of from about 350.degree. C. to about 470.degree. C.,
- (b) spraying said substrate surface with a liquid slurry coating formulation consisting of effective amounts of a metal oxide selected from the group consisting of Group 4b metal oxides, poly(arylene sulfide) and a liquid carrier to provide a coating thereon, wherein said poly(arylene sulfide) has an extrusion rate of about 80 to about 400 grams/10 minutes, and
- (c) further heating said substrate surface having said coating thereon from about 350.degree. C. to about 470.degree. C. for at least about 0.05 hour to provide a cured coating substantially free of pinhole defects.
A method of coating at least one surface of a substrate selected from the group consisting of an iron-containing alloy, a magnesium-containing alloy, aluminum, glass and ceramic comprising the steps of:
- (a) providing a clean substrate surface having a temperature of from about 350.degree. C. to about 470.degree. C.,
- (b) spraying said heated substrate surface with a liquid slurry coating formulation consisting of effective amounts of a metal oxide selected from the group consisting of Group 4b metal oxides, a mixture of a first poly(arylene sulfide) with a second poly(arylene sulfide) selected from the group consisting of poly(p-phenylene sulfide) having an extrusion rate of about 5 to about 75 grams/10 minutes, poly(phenylene sulfide/sulfone) and poly(phenylene sulfide/ketone) and a liquid carrier to provide a coating thereon and wherein said first poly(arylene sulfide) has an extrusion rate of about 80 to about 400 grams/10 minutes, and
- (c) further heating said substrate surface having said coating thereon from about 350.degree. C. to about 470.degree. C. for at least about 0.05 hour to provide a cured coating substantially free of pinhole defects.
A method of coating at least one surface of an iron-containing alloy comprising the steps of:
- (a) providing a clean iron-containing alloy surface,
- (b) heating said surface from about 350.degree. C. to about 470.degree. C. in an atmosphere comprising oxygen and water vapor for a period of at least about 0.5 hour,
- (c) spraying said heated surface with a liquid slurry coating formulation consisting of effective amounts of a metal oxide selected from the group consisting of Group 4b metal oxides, at least one poly(arylene sulfide) and a liquid carrier to provide a coating thereon wherein said at least one poly(arylene sulfide) has an extrusion rate of about 80 to about 400 grams/10 minutes, and
- (d) further heating said surface having said coating thereon from about 350.degree. C. to about 470.degree. C. for at least about 0.05 hour to provide a cured coating substantially free of pinhole defects.
A method of coating at least one surface of an iron-containing alloy comprising the steps of:
- (a) providing a clean iron-containing alloy surface,
- (b) heating said surface from about 350.degree. C. to about 470.degree. C. in an atmosphere comprising oxygen and water vapor for a period of at least about 0.5 hour,
- (c) spraying said heated surface with a liquid slurry coating formulation consisting of effective amounts of a liquid carrier, a metal oxide selected from the group consisting of Group 4b metal oxides, and a mixture of a first poly(arylene sulfide) and a second poly(arylene sulfide) wherein said second poly(arylene sulfide) is selected from the group consisting of poly(p-phenylene sulfide) having an extrusion rate of about 5 to about 75 grams/10 minutes, poly(phenylene sulfide/sulfone) and poly(phenylene sulfide/ketone) and wherein said first poly(arylene sulfide) has an extrusion rate of about 80 to about 400 grams/10 minutes, and
- (d) further heating said surface having said coating thereon from about 350.degree. C. to about 470.degree. C. for at least about 0.05 hour to provide a cured coating substantially free of pinhole defects.
A method according to claim 21 wherein said liquid carrier is selected from the group consisting of water, aliphatic organic compounds having 3-12 carbon atoms per molecule and at least one hydroxyl group per molecule and mixtures of water with said aliphatic organic compounds and wherein said metal oxide is selected from the group consisting of titanium dioxide and zirconium dioxide and wherein said first poly(arylene sulfide) comprises poly(p-phenylene sulfide) having an extrusion rate of about 120 to about 300 grams/10 minutes and a particle size principally in the range of about 10 to about 250 microns.
Dependencies are inferred from the claim text.