Etch resistant clearcoat
AssigneeAxalta Coating Systems IP Co., LLC
InventorsDelson Jayme Trindade, Robert R. Matheson
Life of this patent
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Abstract
A crosslinked coating composition formed from polyurethane polyols and blocked or unblocked polyisocyanates. The polyisocyanates, in particular, comprise at least bis(isocyanatomethyl)cyclohexane. The coating is substantially free from ester functionality that forms a contiguous part of the network backbone. A clearcoat formed from the described components and having a majority of urethane bonds is very resistant to environmental etch damage.
Claims18
A coating composition comprising a crosslinkable component and a crosslinking component wherein the crosslinkable component comprises:
- (i) a polyurethane polyol;
- (ii) a silane resin;
- (iii) a silsesquioxane;
- and
- wherein the crosslinking component is selected from the group consisting of bis(isocyanatomethyl)cyclohexane, an oligomer of bis(isocyanatomethyl)cyclohexane and a combination thereof wherein the coating composition is a clearcoat composition.
A method of coating a substrate said method comprising the steps of;
- 1) applying a layer of a coating composition to the substrate;
- and
- 2) curing the applied coating composition;
- wherein said coating composition comprises a crosslinkable component and a crosslinking component, and wherein the crosslinkable component comprises:
- (i) a silane resin;
- (ii) a silsesquioxane;
- (iii) a polyurethane polyol;
- and
- wherein the crosslinking component comprises a crosslinking agent selected from the group consisting of bis(isocyanatomethyl)cyclohexane, an oligomer of bis(isocyanatomethyl)cyclohexane and a combination thereof.
A substrate coated by a layer of a dried and cured coating composition wherein the coating composition comprises a crosslinkable component and a crosslinking component wherein the crosslinkable component comprises:
- (i) a polyurethane polyol;
- (ii) a silane resin;
- (iii) a silsesquioxane;
- and
- wherein the crosslinking component comprises a crosslinking agent selected from the group consisting of bis(isocyanatomethyl)cyclohexane, an oligomer of bis(isocyanatomethyl)cyclohexane and a combination thereof.
Dependencies are inferred from the claim text.