Patent ID: 8221846

Claim:
A method of manufacturing a refrigerator door having a substantially transparent substrate, the method comprising the acts of: mixing an isocyanate with a polyol to form a mixture, the isocyanate comprising a compound selected from the group consisting of ε-caprolactam blocked toluene diisocyanate, 3,5-dimethylpyrazole blocked toluene diisocyanate, 3,5-dimethylpyrazole blocked isophorone diisocyanate, 3,5-dimethylpyrazole blocked isophorone diisocyanate trimer, 3,5-dimethylpyrazole blocked hexamethylene diisocyanate biuret, diethyl malonate blocked hexamethylene diisocyanate biuret, ε-caprolactam blocked hexamethylene diisocyanate trimer, 3,5-dimethylpyrazole blocked hexamethylene diisocyanate trimer, methylethylketoxime blocked hexamethylene diisocyanate trimer, 3,5-dimethylpyrazole and diethyl malonate blocked isophorone diisocyanate trimer, 3,5-dimethylpyrazole and diethyl malonate blocked hexamethylene diisocyanate biuret, 3,5-dimethylpyrazole and diethyl malonate blocked hexamethylene diisocyanate trimer and a combination thereof, wherein the mixture comprises less than about 55% by weight of polyol, and wherein the mixture is substantially free of surfactant; applying the mixture to at least a portion of the substantially transparent substrate; and curing the mixture to form a coating, the coating showing a change in L* of less than about 10.0, a change in a* of less than about 1.2, and a change in b* of less than about 6.0, when the coating is exposed to fluorescent light having a radiant intensity of 0.05 mw/cm 2 over a period of greater than 5 days, wherein, using CIELAB values, L* measures the psychometric lightness of a coating, an L* value of 100 indicating clear and a value of 0 indicating black, a* measures the color of the coating as referenced against a red(+) and green(−) axis, and b* measures the color of the coating as referenced against a yellow(+) and blue(−) axis, wherein the coating comprises a hydrophobic surface, wherein the substrate is part of a refrigerator door or is used to manufacture a refrigerator door.