Golf balls with soft, resilient bimodal ionomeric covers
First Claim
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1. A composition comprising a bimodal composition consisting essentially of:
- (a) one or more E/X/Y terpolymers, wherein E represents copolymerized residues of ethylene, X represents copolymerized residues of a C3 to C8, α
,β
-ethylenically unsaturated carboxylic acid, and Y represents copolymerized residues of a softening comonomer selected from the group consisting of alkyl acrylates and alkyl methacrylates wherein the alkyl groups have from 1-8 carbon atoms, wherein the level of X is about 2 to 30 wt % and the level of Y is 0 to about 35 wt %, based on the total weight of the E/X/Y copolymer, and wherein the molecular weight (Mw) of the E/X/Y copolymer is in the range of 80,000 to 500,000; and
one or more E/X bipolymers, wherein E represents copolymerized residues of ethylene, X represents copolymerized residues of a C3 to C8, α
,β
-ethylenically unsaturated carboxylic acid, wherein the level of X is about 2 to 30 wt %, based on the total weight of the E/X bipolymer, and wherein the molecular weight (Mw) of the E/X bipolymer is in the range of 80,000 to 500,000;
(b) one or more E/(M)AA copolymers comprising 3 to 25 wt % of copolymerized residues of (M)AA based on the total weight of the E/(M)AA copolymer, wherein the molecular weight (Mw) of the E/(M)AA copolymer is in the range of 2,000 and 30,000; and
wherein the acid residues of (a) and of (b) are at least partially neutralized.
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Abstract
Disclosed are golf balls having soft, resilient bimodal ionomeric covers with improved softness and scuff resistance and methods for their preparation. The soft, resilient bimodal ionomeric covers comprise at least partially neutralized mixtures of carboxylate functionalized terpolymers (molecular weight between about 80,000 and 500,000) with carboxylate functionalized ethylene low copolymers (molecular weight between about 2,000 and 30,000).
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Citations
23 Claims
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1. A composition comprising a bimodal composition consisting essentially of:
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(a) one or more E/X/Y terpolymers, wherein E represents copolymerized residues of ethylene, X represents copolymerized residues of a C3 to C8, α
,β
-ethylenically unsaturated carboxylic acid, and Y represents copolymerized residues of a softening comonomer selected from the group consisting of alkyl acrylates and alkyl methacrylates wherein the alkyl groups have from 1-8 carbon atoms, wherein the level of X is about 2 to 30 wt % and the level of Y is 0 to about 35 wt %, based on the total weight of the E/X/Y copolymer, and wherein the molecular weight (Mw) of the E/X/Y copolymer is in the range of 80,000 to 500,000; andone or more E/X bipolymers, wherein E represents copolymerized residues of ethylene, X represents copolymerized residues of a C3 to C8, α
,β
-ethylenically unsaturated carboxylic acid, wherein the level of X is about 2 to 30 wt %, based on the total weight of the E/X bipolymer, and wherein the molecular weight (Mw) of the E/X bipolymer is in the range of 80,000 to 500,000;(b) one or more E/(M)AA copolymers comprising 3 to 25 wt % of copolymerized residues of (M)AA based on the total weight of the E/(M)AA copolymer, wherein the molecular weight (Mw) of the E/(M)AA copolymer is in the range of 2,000 and 30,000; and wherein the acid residues of (a) and of (b) are at least partially neutralized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification