Golf ball compositions
First Claim
Patent Images
1. A golf ball comprising:
- a core comprising an inner core layer and an outer core layer; and
a cover comprising an inner cover layer and an outer cover layer;
wherein the inner core layer is formed from a rubber composition comprising a base rubber and a catechol; and
wherein the inner core layer has a positive hardness gradient wherein the difference between the Shore C hardness of the outer surface of the inner core layer (HINNER CORE OUTER SURFACE) and the Shore C hardness of the center of the inner core layer (HCENTER)≧
5 Shore C units; and
wherein the surface hardness of the outer core layer is greater than the material hardness of the inner cover layer.
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Abstract
Golf balls comprising a core and a cover are disclosed. The core is a dual- or multi-layer core, wherein at least one layer is formed from a rubber composition comprising a base rubber and a catechol. The core layer formed from such rubber composition has a positive hardness gradient such that the difference between the layer'"'"'s outer surface hardness and inner surface hardness is 5 Shore C units or greater.
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Citations
14 Claims
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1. A golf ball comprising:
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a core comprising an inner core layer and an outer core layer; and a cover comprising an inner cover layer and an outer cover layer; wherein the inner core layer is formed from a rubber composition comprising a base rubber and a catechol; and wherein the inner core layer has a positive hardness gradient wherein the difference between the Shore C hardness of the outer surface of the inner core layer (HINNER CORE OUTER SURFACE) and the Shore C hardness of the center of the inner core layer (HCENTER)≧
5 Shore C units; andwherein the surface hardness of the outer core layer is greater than the material hardness of the inner cover layer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A golf ball comprising:
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a core consisting of an inner core layer and an outer core layer; and a cover comprising an inner cover layer and an outer cover layer; wherein the outer core layer is formed from a rubber composition comprising a base rubber and a catechol; and wherein the outer core layer has a positive hardness gradient wherein the difference between the Shore C hardness of the outer surface of the outer core layer (HOUTER SURFACE) and the Shore C hardness of the inner surface of the outer core layer (HOUTER CORE INNER SURFACE)≧
5 Shore C units; andwherein the surface hardness of the outer core layer is greater than the material hardness of the inner cover layer. - View Dependent Claims (8, 9, 10)
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11. A golf ball comprising:
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a core comprising an inner core layer, a first outer core layer, and a second outer core layer; and a cover comprising an inner cover layer and an outer cover layer; wherein at least one of the first and second outer core layers is formed from a rubber composition comprising a base rubber and a catechol; and wherein the outer core layer formed from the rubber composition comprising the catechol has a positive hardness gradient wherein the difference between the Shore C hardness of the outer surface of the outer core layer (HOUTER SURFACE) and the Shore C hardness of the inner surface of the outer core layer (HOUTER CORE INNER SURFACE) ≧
5 Shore C units; andwherein the surface hardness of the second outer core layer is greater than the material hardness of the inner cover layer. - View Dependent Claims (12, 13, 14)
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Specification