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US 7,888,425 B2Granted
Low volatile organic compound stable solvent-based polyurethane compositions for coatings
AssigneeReichhold, Inc.
InventorsShi Yang, Kristy Magyar, D. Michael Ingle, Glenn Petschke
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Abstract
Dual-crosslinkable urethanes including urethanes having air curable ethylenic unsaturation and at least one moisture curable functionalized group exhibit good strength, chemical stability, and hardness and can be made by incorporating moisture curable functionalized groups into ethylenically unsaturated urethanes.
Claims29
A dual-crosslinkable urethane coating composition comprising:
- an air curable urethane having an ethylenic unsaturated portion;
- at least one moisture curable silane functionalized group;
- and
- a catalyst for the air oxidation of the ethylenic unsaturation,
- wherein said dual-crosslinkable urethane coating composition has an isocyanate content of zero, and
- wherein the at least one moisture curable silane functionalized group is incorporated into the urethane through a reaction of an isocyanate-silane with a hydroxyl-terminated urethane polyol.
3 more elements
A dual-crosslinkable urethane coating composition comprising:
- an air curable urethane having an ethylenic unsaturated portion;
- at least one moisture curable silane functionalized group;
- and
- a catalyst for the air oxidation of the ethylenic unsaturation,
- wherein said dual-crosslinkable urethane coating composition has an isocyanate content of zero, and
- wherein the at least one moisture curable silane functionalized group is incorporated into the urethane through a reaction of an epoxy-silane with carboxylic acid group in a urethane polymer.
3 more elements
A method of forming a dual-crosslinked urethane, comprising:
- reacting an isocyanate with a hydroxyl functional oil-ester to form an air curable urethane polymer having ethylenic unsaturation and incorporating at least one silane group into the urethane to provide a urethane having no isocyanate content;
- and
- curing the air-curable urethane in the presence of moisture, oxygen and a catalyst for the air oxidation of the ethylenic unsaturation,
- wherein the hydroxyl functional oil-ester is formed by the esterification of a polyfunctional alcohol with a fatty acid.
1 more element
A method of forming a dual-crosslinked urethane, comprising:
- reacting an isocyanate with a hydroxyl functional oil-ester to form an air curable urethane polymer having ethylenic unsaturation and incorporating at least one silane group into the urethane to provide a urethane having no isocyanate content;
- and
- curing the air-curable urethane in the presence of moisture, oxygen and a catalyst for the air oxidation of the ethylenic unsaturation,
- wherein the hydroxyl functional oil-ester is formed by the transesterification of a polyfunctional alcohol with an oil, wherein at least a portion of the oil is unsaturated.
1 more element
Dependencies are inferred from the claim text.