Polyurethane golf club inserts
First Claim
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1. An insert for a golf club, wherein the insert is formed of a polyurethane composition comprising a prepolymer comprised of a polyol and a polyisocyanate, and a curing agent, and wherein;
- the polyisocyanate is selected from the group consisting of 4,4′
-diphenylmethane diisocyanate, polymeric 4,4′
-diphenylmethane diisocyanate, toluene diisocyanate, 3,3′
-dimethyl-4,4′
-biphenylene diisocyanate, p-phenylene diisocyanate, 4,4′
-dicyclohexylmethane diisocyanate, and isophorone diisocyanate; and
is present in an amount of about 6 to 12 percent by weight of the prepolymer.
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Abstract
An insert for a golf club, wherein the insert is formed of a polyurethane composition comprising a prepolymer comprised of a polyol and a polyisocyanate, and a curing agent; and wherein the polyisocyanate is selected from the group consisting of 4,4′-diphenylmethane diisocyanate, polymeric 4,4′-diphenylmethane diisocyanate, toluene diisocyanate, 3,3′-dimethyl-4,4′-biphenylene diisocyanate, p-phenylene diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, and isophorone diisocyanate.
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Citations
16 Claims
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1. An insert for a golf club, wherein the insert is formed of a polyurethane composition comprising a prepolymer comprised of a polyol and a polyisocyanate, and a curing agent, and wherein;
the polyisocyanate is selected from the group consisting of 4,4′
-diphenylmethane diisocyanate, polymeric 4,4′
-diphenylmethane diisocyanate, toluene diisocyanate, 3,3′
-dimethyl-4,4′
-biphenylene diisocyanate, p-phenylene diisocyanate, 4,4′
-dicyclohexylmethane diisocyanate, and isophorone diisocyanate; and
is present in an amount of about 6 to 12 percent by weight of the prepolymer.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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3. The insert of claim 2, wherein n and m each separately have a value of 1 or 2.
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4. The insert of claim 1, wherein the curing agent is a diol selected from the group consisting of 1,3-bis(2-hydroxyethoxy) benzene, 1,3-[bis-(2-hydroxyethoxy)]-diethoxy benzene, 1,4-butanediol, resorcinol-di-(β
- -hydroxyethyl) ether, hydroquinone-di-(β
-hydroxyethyl) ether, ethylene glycol, diethylene glycol, polyethylene glycol, and mixtures thereof.
- -hydroxyethyl) ether, hydroquinone-di-(β
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5. The insert of claim 1, wherein the golf club is a putter.
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6. The insert of claim 1, wherein the polyisocyanate is p-phenylene diisocyanate.
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7. The insert of claim 1, wherein the polyol is selected from the group consisting of polytetramethylene ether glycol, poly(oxypropylene) glycol, polybutadiene glycol, polyethylene adipate glycol, polyethylene propylene adipate glycol, and polybutylene adipate glycol, o-phthalate-1,6-hexanediol polyester polyol, diethylene glycol initiated caprolactone, trimethylol propane initiated caprolactone, neopentyl glycol initiated caprolactone, 1,4-butanediol-initiated caprolactone, 1,6-hexanediol-initiated caprolactone, and mixtures thereof.
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8. The insert of claim 1, wherein the polyol is selected from the group consisting of polytetramethylene ether glycol, polyethylene adipate glycol, polybutylene adipate glycol, diethylene glycol initiated caprolactone, and mixtures thereof.
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9. The insert of claim 1, wherein the polyurethane composition further comprises at least one polyamine curing agent.
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10. The insert of claim 9, wherein the curing agent is a polyamine selected from the group consisting of isophrone diamine, dicyclohexylmethane diamine, isomers of 3,5-diethyltoluene-2,4 (2,6)-diamines, isomers of 3,5-dimethylthio-2,4 (2,6)-toluenediamines, 4,4′
- -bis-(sec-butylamino)-diphenylmethane, 1,4-bis-(sec-butylamino)-benzene, 4,4′
-methylene-bis-(2-chloroaniline), 4,4′
-methylene-bis-(3-chloro-2,6-diethylaniline), trimethylene glycol-di-p-aminobenzoate, polytetramethyleneoxide-di-p-aminobenzoate, and mixtures thereof.
- -bis-(sec-butylamino)-diphenylmethane, 1,4-bis-(sec-butylamino)-benzene, 4,4′
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11. The insert of claim 10, wherein the polyamine curing agent has a formula:
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12. The insert of claim 1, wherein the polyurethane composition comprises a reaction product of p-phenylene diisocyanate, polytramethylene ether glycol, and 3,5-dimethylthio-2,4(2,6)-toluenediamine.
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13. The inset of claim 1, wherein the polyurethane composition further comprises a density-modifying filler.
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14. An insert for a golf club, wherein the insert is formed of a polyurethane composition comprising:
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a prepolymer comprised of a polyol and a polyisocyanate comprising polymeric 4,4′
-diphenylmethane diisocyante, p-phenylene diisocyanate, or isophorone diisocyanate; and
a curing agent.
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15. A golf putter comprising an insert, wherein the insert comprises a prepolymer comprised of a polyol and a polyisocyanate, and a curing agent wherein:
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the polyol comprises polytetramethylene ether glycol;
the polyisocyanate comprises p-phenylene diisocyanate; and
the curing agent comprises 3,5-dimethylthio-2,4(2,6)-toluenediamine. - View Dependent Claims (16)
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Specification