Rubber compositions comprising quinhydrones and the use thereof in golf balls
AssigneeAcushnet Company
InventorsBrian Comeau, Douglas S. Goguen, David A. Bulpett
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a golf ball having at least one layer formed from a rubber composition comprising a base rubber, a free radical initiator, and a quinhydrone. The free radical initiator is generally present in the rubber composition in an amount of at least 0.05 parts by weight per 100 parts of the base rubber. The quinhydrone is generally present in the rubber composition in an amount of at least 0.05 parts by weight per 100 parts of the base rubber. The rubber composition may be present in any one or more of a core layer, a cover layer, or an intermediate layer.
Claims20
A golf ball comprising at least one layer formed from a rubber composition comprising:
- (a) a base rubber;
- (b) a free radical initiator;
- and
- (c) a quinhydrone.
A golf ball comprising a core and a cover, wherein the core has at least one layer formed from a rubber composition comprising:
- (a) a base rubber;
- (b) at least 0.05 parts by weight of a free radical initiator per 100 parts of the base rubber;
- and
- (c) at least 0.15 parts by weight of a quinhydrone per 100 parts of the base rubber.
A golf ball comprising a core and a cover, wherein the core has at least one layer formed from a rubber composition comprising:
- (a) a base rubber;
- (b) at least 0.05 parts by weight of a free radical initiator, per 100 parts of the base rubber;
- and
- (c) at least 0.15 parts by weight of a quinhydrone, per 100 parts of the base rubber;
- wherein the quinhydrone is selected from compounds represented by the following formula, and hydrates thereof:
- wherein each R1, R2, R3, R4, R5, R6, R7, and R8 is independently selected from the group consisting of hydrogen, a halogen group (F, Cl, Br, I), an alkyl group, a carboxyl group (—COOH) and metal salts thereof and esters thereof, an acetate group (—CH2COOH) and esters thereof, a formyl group (—CHO), an acyl group, an acetyl group (—COCH3), a halogenated carbonyl group, a sulfo group (—SO3H) and esters thereof, a halogenated sulfonyl group, a sulfino group (—SO2H), an alkylsulfinyl group, a carbamoyl group (—CONH2), a halogenated alkyl group, a cyano group (—CN), an alkoxy group, a hydroxy group (—OH) and metal salts thereof, an amino group (—NH2), a nitro group (—NO2), an aryl group, an aryloxy group, an arylalkyl group, a nitroso group (—NO), an acetamido group (—NHCOCH3), and a vinyl group (—CH═CH2);
- wherein a ratio (PQUINHYDRONE/PINITIATOR) of the amount of the quinhydrone present in the rubber composition (PQUINHYDRONE), measured in parts by weight per 100 parts of the base rubber, to the amount of free radical initiator present in the rubber composition (PINITIATOR), measured in parts by weight per 100 parts of the base rubber, is from 0.25 to 2;
- and
- wherein the rubber composition is substantially free of organosulfur compounds.
Dependencies are inferred from the claim text.