Low cost, resilient, shear resistant polyurethane elastomers for golf ball covers

A method of making a golf ball comprising

• 1) a core, and
• 2) a cover comprising a polyurethane elastomer, wherein the method comprises molding around a pre-made core a cover composition comprising the reactants necessary to produce said polyurethane elastomer, said reactants consisting essentially of:
• A) at least one diisocyanate monomer;
• B) at least one polyether polyol having a number average molecular weight greater than 1000 and selected from the group consisting of homopolymers of ethylene oxide and copolymers of ethylene oxide and propylene oxide;
• and
• C) at least one hydroxy or amine functional chain extender;
• wherein the ratio of equivalents of C) plus B) to equivalents of A) is in the range of from about 0.6:1 to about 1.2:1.

A golf ball comprising a core and a cover, said cover comprising a polyurethane elastomer consisting essentially of the reaction product of:

• A) at least one diisocyanate monomer selected from the group consisting of TDI, IPDI, and mixtures thereof;
• B) at least one polyether polyol having a number average molecular weight in the range of from about 1500 to about 10,000 and selected from the group consisting of homopolymers of ethylene oxide and copolymers of ethylene oxide and propylene oxide and, optionally, at least one glycol or triol having a molecular weight in the range of from 60 to 250;
• and
• C) at least one amine chain extender selected from the group consisting of 3,5-diethyl-2,4 toluenediamine, 3,5-diethyl-2,6 toluenediamine, and mixtures thereof;
• wherein the ratio of equivalents of C) plus B) to equivalents of A) is in the range of from about 0.6:1 to about 1.2:1.

A method of making a golf ball comprising:

• 1) a core, and
• 2) a cover comprising a polyurethane elastomer,
• wherein the method comprises molding around a pre-made core a cover composition comprising the reactants necessary to produce said polyurethane elastomer, said reactants consisting essentially of:
• A) at least one diisocyanate monomer selected from the group consisting of TDI, IPDI, and mixtures thereof;
• B) at least one polyether polyol having a number average molecular weight in the range of from about 1500 to about 10,000 and selected from the group consisting of homopolymers of ethylene oxide and copolymers of ethylene oxide and propylene oxide and, optionally, at least one glycol or triol having a molecular weight in the range of from 60 to 250;
• and
• C) at least one amine chain extender selected from the group consisting of 3,5-diethyl-2,4 toluenediamine, 3,5-diethyl-2,6 toluenediamine, and mixtures thereof;
• wherein the ratio of equivalents of C) plus B) to equivalents of A) is in the range of from about 0.6:1 to about 1.2:1.