Multilayer golf ball and composition
First Claim
1. A golf ball comprising:
- (a) a core formed from a blend comprising polybutadiene, wherein the core has a compression of no greater than about 60;
(b) a cover layer having a Shore D hardness of about 60 to about 72;
(c) an intermediate layer disposed between the cover and the core, wherein the intermediate layer is formed from a blend comprising an ethylene methacrylic/acrylic acid copolymer having the formula consisting essentially of;
##STR2## wherein x=50 to 99%;
y=1 to 50%;
z=0 to 49%;
R1 =H or CH3 ;
R2 =methyl, butyl, an isobornyl; and
n=0 to 12; and
wherein the golf ball has a COR measured at 125 ft./sec. of about 0.795 to about 0.815.
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Accused Products
Abstract
The present invention is directed towards a multi-layer golf ball which comprises a core, a cover layer and at least one intermediate layers disposed between the core and cover, wherein the intermediate layer comprises an ethylene methacrylic/acrylic acid copolymer and optionally, a second thermoplastic component such as polyetherester block copolymer, polyesterester block copolymer, polyetheramide block copolymer, dynamically vulcanized thermoplastic elastomer, functionalized styrene-butadiene elastomer, thermoplastic polyurethane, thermoplastic polyesters, metallocene polymer or blends thereof and a filler such as zinc oxide, titanium dioxide or blends thereof. Further, in a preferred embodiment, the core has a compression less than 60, the finished ball has a COR (@ 125 ft/sec) of about 0.795 to about 0.815, the intermediate layer has a specific gravity of greater than about 1.2 and the cover has a Shore D hardness of about 60 to about 72.
91 Citations
18 Claims
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1. A golf ball comprising:
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(a) a core formed from a blend comprising polybutadiene, wherein the core has a compression of no greater than about 60; (b) a cover layer having a Shore D hardness of about 60 to about 72; (c) an intermediate layer disposed between the cover and the core, wherein the intermediate layer is formed from a blend comprising an ethylene methacrylic/acrylic acid copolymer having the formula consisting essentially of;
##STR2## wherein x=50 to 99%;
y=1 to 50%;
z=0 to 49%;
R1 =H or CH3 ;
R2 =methyl, butyl, an isobornyl; and
n=0 to 12; andwherein the golf ball has a COR measured at 125 ft./sec. of about 0.795 to about 0.815. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A golf ball comprising:
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(a) a core formed from a blend comprising polybutadiene, wherein the core has a compression of less than about 55; (b) a cover layer formed from a blend of two or more ionomer resins, wherein said cover layer has a Shore D hardness of about 66 to about 70; (c) an intermediate layer disposed between the cover and the core, wherein the intermediate layer has a specific gravity of about 1.27 and is formed from a blend comprising; (i) about 15 to about 25 wt. % an ethylene methacrylic/acrylic acid copolymer having the formula consisting essentially of;
##STR3## wherein x=50 to 99%;
y=1 to 50%;
z=0 to 49%;
R1 =H or CH3 ;
R2 =methyl, butyl, and isobornyl; and
n=0 to 12;(ii) about 20 to about 30 wt. % ZnO; and (iii) up to about 60 wt. % polyetherester block copolymer; and
wherein the golf ball has a COR of about 0.804 to about 0.806. - View Dependent Claims (16, 17)
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18. A golf ball comprising a core, a cover layer having a Shore D hardness of about 60 to about 68, and an intermediate layer disposed between the cover and the core, wherein the intermediate layer is formed from a blend comprising an ethylene methacrylic/acrylic acid copolymer having the formula consisting essentially of:
- ##STR4## wherein x=50 to 99%;
y=1 to 50%;
z=0 to 49%;
R1 =H or CH3 ;
R2 =methyl, butyl, and isobornyl; and
n=0 to 12; andand a second component comprising a thermoplastic material.
- ##STR4## wherein x=50 to 99%;
Specification