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US 11,035,013 B2Granted
Use of hydroxy functional waterborne resins to create urethane crosslinking in leather finishes
AssigneeLear Corporation
InventorRobert von Berge
Life of this patent
Estimating the term…
Abstract
A coating composition includes at least one, low Tg, polyol resin having hydroxyl groups available for crosslinking, a polyurethane crosslinker that crosslinks the hydroxyl groups when cured, and water in an amount from about 4 to 20 wt. % of the total weight of the coating composition. Characteristically, solvents other than water are present in an amount less than half the amount of water. The coating composition is advantageously used to finish leather.
Claims19
A coating composition comprising:
- at least one polyol resin having hydroxyl groups available for crosslinking wherein the at least one polyol resin includes a resin with glass transition temperatures less than 10° C.;
- a polyurethane crosslinker that crosslinks the hydroxyl groups when cured;
- and
- water in an amount from about 4 to 20 wt. % of the total weight of the coating composition wherein solvents other than water are present in an amount less than half the amount of water.
1 more element
A method comprising:
- applying a coating composition to a substrate to form an uncured coating on the substrate, the coating composition comprising:
- at least one polyol resin having hydroxyl groups available for crosslinking wherein the at least one polyol resin includes a resin with glass transition temperatures less than 10° C.;
- a polyurethane crosslinker that crosslinks the hydroxyl groups when cured;
- and
- water in an amount from about 4 to 20 wt. % of the total weight of the coating composition wherein solvents other than water are present in an amount less than half the amount of water;
- and
- curing the uncured coating to form a coated substrate.
4 more elements
A coating composition comprising:
- at least one polyol resin having hydroxyl groups available for crosslinking;
- a polyurethane crosslinker that crosslinks the hydroxyl groups when cured;
- and
- water in an amount from about 4 to 20 wt. % of the total weight of the coating composition wherein solvents other than water are present in an amount less than half the amount of water and wherein the at least one polyol resin includes:
- a hydroxylated polyester in an amount of 40 to 80 wt. % of the total weight of the coating composition;
- a polyurethane polyol in an amount of 1 to 10 wt. % of the total weight of the coating composition;
- an acrylic polyol in an amount of 1 to 10 wt. % of the total weight of the coating composition;
- and
- an acrylic diol in an amount of 1 to 10 wt. % of the total weight of the coating composition.
6 more elements
Dependencies are inferred from the claim text.