Multi-layer core golf ball having thermoset rubber cover
AssigneeAcushnet Company
InventorsEric D. Bartsch, Michael J. Sullivan
Life of this patent
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Abstract
A golf ball with one or more thermosetting rubber core layers, intermediate layers and cover layers. At least one of the ball's layers has a moisture vapor barrier property, and the thermosetting rubber layers follow a cis- or a trans-polybutadiene gradient from the center of the ball to its cover. Each of the core layer, intermediate layer and cover layer comprises a cross-linked thermoset rubber composition having a primary rubber component of polybutadiene having a polydispersity of no greater than about 2 or a weight average molecular weight Mw greater than about 400,000 in an amount of greater than about 80% by weight and a crosslinking initiator.
Claims9
A golf ball comprising a core layer, a cover layer, and at least one intermediate layer disposed between the core and the cover, wherein said core layer, said cover layer, and said at least one intermediate layer each comprises a cross-linked thermoset rubber composition having a primary rubber component of polybutadiene having a polydispersity of no greater than about 2 in an amount of greater than about 80% by weight and a crosslinking initiator, the core layer having a cis-1,4-polybutadiene content (δcr), the at least one intermediate layer having a cis-1,4-polybutadiene content (δim), and the cover layer having a cis-1,4-polybutadiene content (δcv) such that δcr≧δim≧, δcv, wherein a layer outside the core comprises a specific gravity higher than that of the core by greater than about 0.1 g/cm3, wherein at least one of the core layer, cover layer and intermediate layer comprises a moisture vapor barrier layer and wherein the overall ball comprises a compression of from 60 to 110 and a coefficient of restitution of from 0.750 to 0.850.
Dependencies are inferred from the claim text.