Back to results
US 6,639,024 B2Granted
Coating a ball with two-part polyester polyol-catalyst/polyisocyanate system
AssigneeThe Top-Flite Golf Company
InventorsVincent Simonds, Richard K. Gendreau, Thomas J. Kennedy, III
Life of this patent
Estimating the term…
Abstract
A method of coating a game ball with a rapidly curing polyurethane coating system is described herein. The coating system comprises a mixture of a polyol, an isocyanate, a solvent and a high level of catalyst which accelerates the curing process. The coating is a two-part polyurethane system which is preferably applied by spraying. The coating is particularly well-suited for use on golf balls, and also can be applied to other game balls such as softballs, baseballs, cricket balls.
Claims16
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═C═O:
- —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.
9 more elements
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═C═O:
- —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 substantially immediately prior to the step of applying.
9 more elements
A method for coating a golf ball with a coating system comprising:
- forming a coating first part in a first container, the coating first part containing 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;
- forming a coating second part in a second container, the coating second part containing a polyisocyanate which is present in a quantity appropriate to provide a ratio of N═C═O:—OH in the range of 0.9:1 to 1.8:1;
- adding up to 65 wt % of a solvent to one of the coating first part or the coating second part based upon a weight of the coating system;
- adding a quantity of catalyst to one of the coating first part or the coating second part;
- mixing the coating first and second parts to form the coating system, wherein the quantity of catalyst added is sufficient to provide for a coating system increase in viscosity of at least 100% within 30 minutes after mixing the coating first and second parts if the mixture is maintained at 25° C., 1 atm and 60% relative humidity;
- providing a golf ball having a dimpled exterior surface;
- spraying the coating system toward the surface of the golf ball substantially immediately after the step of mixing;
- and
- curing the coating at an elevated temperature for a time of no more than 1.5 hours, the coating having a Sward rocker hardness in the range of 40 to 70 when cured.
6 more elements
Dependencies are inferred from the claim text.