Patent ID: 6639024
Filing Date: 2003-10-28
Classification: A63B,C08G,C09D

Abstract:
A method for coating a game ball comprising:forming a coating system comprising (A) a polyol which is a condensation product of (1) an organic acid which includes at least one member selected from the group consisting of adipic acid, phthalic acid and isophthalic acid, (2) an anhydride, and (3) a glycol which includes at least one member selected from the group consisting of ethylene glycol and trimethylol propane, (B) 0.05 to 0.35 wt % of a catalyst based upon total resin solids, (C) a polyisocyanate which is present in a quantity appropriate to provide a ratio of N&boxH;C&boxH;O: â€”OH in the range of 0.9:1 to 1.8:1 and (D) up to 65 wt % of a solvent based upon weight of the coating system, wherein the quantity of catalyst is sufficient to provide for a reduction in cure time of at least 75 percent compared to a cure time of a non-catalyzed system of the same composition; providing a game ball having an exterior surface; applying the coating system to the surface of the game ball to form a coating thereon; and curing the coating at an elevated temperature and for a time less than 1.5 hours, wherein the step of forming a coating system comprises the steps of: providing a coating first part in a first container, the coating first part containing (A) the polyol; providing a coating second part in a second container, the coating second part containing (C) the polyisocyanate; adding up to 65 wt % of the solvent to one of the coating first part or the coating second part based upon a weight of the coating system; adding the catalyst to one of the coating first part or the coating second part; and mixing the coating first and second parts to form the coating system.