Methods for making polyurea and polyurethane polymers and golf balls prepared therefrom

摘要

Methods for making golf balls having a cover made from polyurea and polyurethane compositions are provided. The methods for making the polyurea and polyurethane composition involve preparing an amine-terminated or hydroxyl-terminated first prepolymer by reacting a first isocyanate compound with a stoichiometric excess of polyamine or polyol (depending on the type of prepolymer desired). The first prepolymer is then reacted with a stoichiometric excess of a second isocyanate compound to form an isocyanate-terminated second prepolymer. The second prepolymer is then reacted with a chain extender.

主权项

1. A method of forming a golf ball comprising:
providing a golf ball core; forming a first hydroxyl-terminated prepolymer by reacting a first isocyanate compound with a stoichiometric excess of polyol compound; forming an isocyanate-terminated second prepolymer by reacting the first hydroxyl-terminated prepolymer with a stoichiometric excess of a second isocyanate compound,
wherein the first isocyanate compound and the second isocyanate compound are different chemical compounds, andwherein the first isocyanate compound and the second isocyanate compound are each selected from the group consisting of 1,4, cyclohexyl diisocyanate (CHDI); 4,4′-diphenylmethane diisocyanate (MDI); 2,4-toluene diisocyanate (TDI); 1,6-hexamethylene diisocyanate (HDI); 2,6-toluene diisocyanate; trimethyl hexamethylene diisocyanate (TMDI); 3,3′-dimethyl-4,4′-biphenyl diisocyanate (TODD); p-phenylene diisocyanate (PPDI); dodecane diisocyanate (C12DI); m-tetramethylene xylene diisocyanate (TMXDI); 1,4-benzene diisocyanate; trans-cyclohexane-1,4-diisocyanate; 1,5-naphthalene diisocyanate (NDI); and 4,6-xylyene diisocyanate (XDI); reacting the second prepolymer with a hydroxyl-terminated chain extender to form a polyurethane composition; and forming a cover disposed about the core comprising the polyurethane composition.