Golf ball

Abstract

A golf ball including a core and at least one layer formed over the core. The layer can be an outer core layer, an intermediate layer including inner cover layers, or a cover. Either the core or any layer over the core can comprise a fully or partially neutralized polyester ionomer. The core comprises: a diameter of at least 1.30 inches, a compression of 50 or less; and a coefficient of restitution of 0.80 or greater at 125 ft/sec.

1 . A golf ball comprising:
 a core, and at least one layer over the core, wherein the core or the at least one layer comprises a material formed from a composition comprising a partially or fully neutralized polyester ionomer.   
     
     
         2 . The golf ball of  claim 1 , wherein the at least one layer comprises a cover. 
     
     
         3 . The golf ball of  claim 1 , wherein the at least one layer comprises an outer core layer and a cover. 
     
     
         4 . The golf ball of  claim 1 , wherein the at least one layer comprises a core layer, at least one intermediate layer and a cover. 
     
     
         5 . The golf ball of  claim 1 , wherein the at least one layer comprises at least one intermediate layer and a cover. 
     
     
         6 . The golf ball of  claim 1 , wherein the polyester ionomer comprises a monomer containing an ionic moiety such as sulfonate or carboxylate. 
     
     
         7 . The golf ball of  claim 6 , wherein the monomers comprise dimethyl phthalate, terephthalic acid, PTMEG, butane diol, isophthaloyl chloride, polybutadiene diol, dimethyl sebacate, 3-sodium sulfophthalic acid, 5-sulfoisiphthalate, or phthalic anhydride. 
     
     
         8 . The golf ball of  claim 6 , wherein the ionic moiety comprises being neutralized with a counter-ion selected from the group consisting of Li, Na, K, Mg, Ca, Sr, Zn, Al, ammonium and alkylammonium metal cations. 
     
     
         9 . The golf ball of  claim 8 , wherein the comonomer comprises a viscosity reducer or flow modifier. 
     
     
         10 . The golf ball of  claim 1 , wherein the cover further comprises partially- or fully-neutralized ionomers, metallocene-catalyzed polymers, single-site catalyzed polymers, polyesters, polyethers, balata, crosslinked diene rubbers, styrene block copolymers, polyurethanes, polyureas, polyurethane-ureas, polyurea-urethanes, or non-ionic fluoropolymers. 
     
     
         11 . The golf ball of  claim 10 , wherein the cover comprises a thermoset polymer having a Shore D hardness of 60 or less. 
     
     
         12 . The golf ball of  claim 1 , wherein the combination of the core and the at least one layer results in the golf ball having a coefficient of restitution of 0.810 to 0.825 when measured at an incoming velocity of 125 ft/s. 
     
     
         13 . A golf ball comprising:
 a core, at least one intermediate layer, and a cover, wherein the core or the intermediate layer or the cover least comprises a material formed from a composition comprising a partially or fully neutralized polyester ionomer compound.   
     
     
         14 . The golf ball of  claim 13 , wherein the core is formed from a rubber composition containing a fully or partially neutralized polyester ionomer compound, the core having a Shore C hardness greater than 80, a compression of less than about 50, a COR of at least 0.800 at 125 feet per second. 
     
     
         15 . The golf ball of  claim 13 , wherein the cover is formed from a fully or partially neutralized polyester ionomer compound, the cover having a Shore D hardness of 60 or less.