Golf club head with a polymer insert
First Claim
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1. A golf club bead comprising:
- a club head body having a front face with a recess therein;
an insert disposed within the recess, the insert occupying more than 80% of the face and comprising a thermoset polyurethane formed from reactants comprising para-phenylene diisocyanate terminated polyether prepolymer having a nitrogen-carbon-oxygen group content ranging from 5% to 8%, and a blend of a diols, the thermoset polyurethane having a Shore D hardness in the range of 42-55, and a Bayshore rebound in the range of 51-70.
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Abstract
The present invention is a golf club head having a club head body with a recess and an insert therein. The insert is composed of a thermoset polyurethane material having a shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermoset polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club head is preferably a putter club head, however, it may be a wood club head or an iron club head. The particular thermoset polyurethane provides a soft striking face for feel and a good rebound for distance.
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Citations
19 Claims
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1. A golf club bead comprising:
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a club head body having a front face with a recess therein;
an insert disposed within the recess, the insert occupying more than 80% of the face and comprising a thermoset polyurethane formed from reactants comprising para-phenylene diisocyanate terminated polyether prepolymer having a nitrogen-carbon-oxygen group content ranging from 5% to 8%, and a blend of a diols, the thermoset polyurethane having a Shore D hardness in the range of 42-55, and a Bayshore rebound in the range of 51-70. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A golf club head comprising:
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a club head body having a recess therein; and
an insert disposed within the recess of the body, the insert comprising a thermoset polyurethane formed from reactants comprising a p-phenylene diisocyanate terminated polyester prepolymer in an amount up to 90 parts, a p-phenylene diisocyanate terminated polyether prepolymer in an amount of 50 parts to 90 parts, 10 parts to 40 parts of toulene diisocyanate polyurethane prepolymer, and at least one curing agent. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A golf club head comprising:
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a club head body comprising a front face, a toe end to one side of the face a heel end to the other side of the face, and a sole, the front face having a recess therein;
an insert disposed within the recess, the insert composed of a thermoset polyurethane material comprising a p-phenylene diisocyanate terminated polyester prepolymer in an amount of 10 to 90 parts, a p-phenylene diisocyanate terminated polyether prepolymer in an amount of 50 parts to 90 parts, 10 parts to 40 parts of toulene diisocyanate polyurethane prepolymer, and at least one curing agent from the group consisting of a blend of diols and a blend of diamines, the insert having a Shore D hardness in the range of 42 to 55 and a Bayshore rebound in the range of 55 to 70. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification