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US 6,306,049 B1Granted
Method of improving impact resistance in golf ball core formulations
AssigneeAcushnet Company
InventorMurali Rajagopalan
Life of this patent
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Abstract
A golf ball having a cover, a core, and, optionally, an intermediate layer between the cover and the core and a method of making such a golf ball, where at least a portion of the core is formed from a core blend of an elastomer, a metal salt acrylate or diacrylate, and at least one low modulus ionomer terpolymer or acid terpolymer. The low modulus ionomer or acid terpolymer is present in the core blend in an amount of up to about 50 pph based on the weight of the elastomer.
Claims8
A method for making a golf ball core comprising:
- (a) selecting a low modulus ionomer terpolymer or acid terpolymer of formula:
- wherein
- R1, R2, and R3 are hydrogen or CH3;
- R4 is linear or branched alkyl of formula CnH2n+1, where n is an integer, such as CH3, C2H5, C3H7, C4H9, and C5H11;
- m+ is H+, Li+, Zn++, Ca++, Ti++, Mg++, Na+, W+++, or Zr++;
- and
- x ranges from about 20 to about 85 weight per cent of the polymer, y ranges from about 1 to about 50 weight per cent of the polymer, and z ranges from about 1 to about 30 weight per cent of the polymer;
- (b) forming a rubber or elastomer blend comprising the low modulus ionomer or acid terpolymer, a base rubber, a metal salt acrylate or diacrylate, and an initiator;
- (c) molding the blend for a time and at a temperature sufficient to cross link the blend to form a golf ball core;
- and
- (d) molding a cover around the golf ball core to form a golf ball.
8 more elements
Dependencies are inferred from the claim text.