Patent ID: 9227109
Filing Date: 2016-01-05
CPC Classification: A63B,C08G,C08K,C09D

Claim Text:
1. A golf ball comprising: an inner core layer formed from a diene rubber composition and having a diameter of from 0.950 inches to 1.015 inches, an Atti compression of 30 or less, a center Shore C hardness of from 65 to 75, a surface Shore C hardness of from 50 to 65, and a zero hardness gradient or a negative hardness gradient wherein the difference between the Shore C hardness of the outer surface of the inner core layer and the Shore C hardness of the center of the inner core layer is from −15 to −5; an outer core layer formed from a diene rubber composition and having a thickness of from 0.250 inches to 0.300 inches and an outer surface Shore C hardness of from 85 to 95; an inner cover layer formed from an ionomer composition and having a thickness of from 0.030 inches to 0.040 inches and an outer surface Shore C hardness of 93 or greater; an outer cover layer formed from a polyurethane composition and having a thickness of from 0.030 inches to 0.035 inches and an outer surface Shore C hardness of from 75 to 90; a pigmented solvent-borne primer coat; and a solvent-borne top coat; wherein the polyurethane outer cover layer composition comprises a reaction product of a prepolymer and a curing agent, wherein the prepolymer is a reaction product of a polyol mixture and a diisocyanate, and wherein the polyol mixture comprises a UV absorber in an amount such that the final polyurethane comprises from 4 wt % to 6 wt % of the UV absorber; and wherein a core assembly consisting of the inner core layer and the outer core layer has an Atti compression of from 80 to 95.