US2010304896A1PendingUtilityA1

Polyurea covers for golf balls based on cycloaliphatic isocyanates

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Assignee: MICHALEWICH MICHAELPriority: May 27, 2009Filed: May 27, 2009Published: Dec 2, 2010
Est. expiryMay 27, 2029(~2.9 yrs left)· nominal 20-yr term from priority
Inventors:Michael MichalewichShawn RicciBrian Comeau
A63B 37/00622A63B 37/0023A63B 37/0064A63B 37/0033A63B 37/0031C08G 18/757A63B 37/0027C08L 75/02
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Claims

Abstract

A golf ball having a cover material made from a polyurea composition is provided. In one version, the golf ball includes a polybutadiene core and surrounding cover layer made of a polyurea composition. In another version, the golf ball includes a polybutadiene core, an intermediate casing layer made of an ionomer resin, and outer cover layer made of the polyurea composition. The polyurea composition is the reaction product of a cycloaliphatic isocyanate and amine compound. The diisocyanate is selected from 1,3-bis(isocyanatomethyl)cyclohexane; 1,4-bis(isocyanatomethyl)cyclohexane; and mixtures thereof. The resulting cover material has many advantages including improved durability, toughness, and light-stability.

Claims

exact text as granted — not AI-modified
1 . A golf ball, comprising:
 a core; and   a polyurea cover material produced by a reaction of ingredients comprising an isocyanate selected from the group consisting of 1,3-bis(isocyanatomethyl)cyclohexane; 1,4-bis(isocyanatomethyl)cyclohexane; and mixtures thereof; an amine-terminated compound; and amine cross-linking agent.   
     
     
         2 . The golf ball of  claim 1 , wherein the isocyanate is 1,3-bis(isocyanatomethyl)cyclohexane. 
     
     
         3 . The golf ball of  claim 1 , wherein the isocyanate is 1,4-bis(isocyanatomethyl)cyclohexane. 
     
     
         4 . The golf ball of  claim 1 , wherein the core comprises polybutadiene. 
     
     
         5 . The golf ball of  claim 1 , wherein the curing agent is an amine-terminated curing agent selected from the group consisting of 4,4′-diamino-diphenylmethane; 3,5-diethyl-(2,4- or 2,6-)toluenediamine; 3,5-dimethylthio-(2,4- or 2,6-)toluenediamine; 3,5-diethylthio-(2,4- or 2,6-)toluenediamine: 2,2′-dichloro-3,3′,5,5′-tetraethyl-4,4′-diamino-diphenylmethane; polytetramethyleneglycol-di(p-aminobenzoate); 4,4′-bis(sec-butylamino)-dicyclohexylmethane; and mixtures thereof. 
     
     
         6 . The golf ball of  claim 1 , wherein the polyurea cover material further comprises pigments and fillers. 
     
     
         7 . The golf ball of  claim 1 , wherein the core has a diameter of about 1.26 to about 1.60 inches. 
     
     
         8 . The golf ball of  claim 1 , wherein the cover has a thickness of about 0.015 to about 0.090 inches. 
     
     
         9 . The golf ball of  claim 7 , wherein the cover has a thickness of about 0.020 to about 0.050 inches. 
     
     
         10 . The golf ball of  claim 8 , wherein the cover has a thickness of about 0.020 to about 0.035 inches. 
     
     
         11 . The golf ball of  claim 1 , wherein the core has a surface hardness in the range of about 30 to about 65 Shore D. 
     
     
         12 . The golf ball of  claim 1 , wherein the cover has a material hardness of about 30 to about 65 Shore D. 
     
     
         13 . The golf ball of  claim 12 , wherein the cover has a material hardness of about 35 to about 55 Shore D. 
     
     
         14 . A golf ball, comprising:
 a core;   an intermediate casing layer overlying the core; and   a polyurea cover material produced by a reaction of ingredients comprising an isocyanate selected from the group consisting of 1,3-bis(isocyanatomethyl)cyclohexane; 1,4-bis(isocyanatomethyl)cyclohexane; and mixtures thereof; an amine-terminated compound; and amine cross-linking agent.   
     
     
         15 . The golf ball of  claim 14 , wherein the isocyanate is 1,3-bis(isocyanatomethyl)cyclohexane. 
     
     
         16 . The golf ball of  claim 14 , wherein the isocyanate is 1,4-bis(isocyanatomethyl)cyclohexane. 
     
     
         17 . The golf ball of  claim 14 , wherein the core comprises polybutadiene. 
     
     
         18 . The golf ball of  claim 14 , wherein the polyurea cover material further comprises pigments and fillers. 
     
     
         19 . The golf ball of  claim 14 , wherein the intermediate layer comprises an ionomer resin. 
     
     
         20 . The golf ball of  claim 14 , wherein the intermediate layer comprises a blend of ionomer and non-ionomer resins.

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