Patent ID: 11938380
Assignee: ACUSHNET COMPANY
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 12:
13. A golf ball, comprising:
a solid core having an outer surface and a geometric center, wherein the solid core is formed from a rubber composition cured under heat, the rubber composition consisting of:
polybutadiene rubber,
dicumyl peroxide,
zinc oxide,
zinc diacrylate,
calcium sulfate dihydrate,
zinc pentachlorothiophenol, and
barium sulfate,

wherein the calcium sulfate dihydrate is present in the rubber composition in an amount of about 1 phr to about 3.9 phr,
wherein the geometric center and the outer surface each has a hardness and the hardness of the geometric center is from about 40 Shore C to about 70 Shore C and the hardness of the outer surface is from about 75 Shore C to about 105 Shore C,
wherein the hardness of the outer surface is greater than the hardness of the geometric center to define a positive hardness gradient of at least 34 Shore C units;
an inner cover layer surrounding the core; and
an outer cover layer disposed about the inner cover layer.