Golf equipment formed from castable formulations with resiliency comparable to ionomer resins

Inactive Publication Date: 2009-03-05
ACUSHNET CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Balata covered golf balls are easily damaged, however, which discourages the average golfer from using such balls.
However, while ionomer resin covered golf balls possess virtually cut-proof covers, the spin and feel are inferior compared to balata covered balls.
Once these two ingredients are combined, the reaction rate is very fast and, thus, the ability to vary the physical properties of the composition is limited.
While polyurethane and polyurea covered golf balls are softer than ionomer resin covered golf balls, such balls do not fully match ionomer resin golf balls with respect to resil

Method used

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  • Golf equipment formed from castable formulations with resiliency comparable to ionomer resins
  • Golf equipment formed from castable formulations with resiliency comparable to ionomer resins
  • Golf equipment formed from castable formulations with resiliency comparable to ionomer resins

Examples

Experimental program
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Effect test

example 1

Solid Sphere Formed with Composition of Invention

[0311]A solid sphere was formed with a composition of the invention (sample #1). As shown in Table 2, the compression and coefficient of restitution (COR) are higher than solid spheres formed with ionomeric materials. In particular, a composition was formed by reacting excess aliphatic polyisocyanate based on hexamethylene diisocyanate having NCO content of 24 percent (Desmodur® XP-2410, available from Bayer) with a secondary diamine having a molecular weight of 2050 (Jeffamine® XTJ-576, commercially available from Huntsman) to form a prepolymer having free NCO content of 14 percent. The prepolymer was then crosslinked with 3,3′-dimethyl-4,4′-bis(sec-butylamino)-dicyclohexylmethane (Clearlink® 3000, available from UOP) at a ratio of 1:0.95 prepolymer to curing agent. Comparison solid spheres were formed using the ionomeric materials found in the covers of various Titlelist golf balls, i.e., samples #2 and #3 are based on the cover mat...

example 2

Compositions of Invention

[0312]In addition to the formulation described above in Example 1, as shown in Table 3, compositions of the invention may be formed using variations of these components.

TABLE 3COMPOSITIONS OF THE INVENTIONComponent#1#2#3#4#5#6#7Isocyanate-ContainingSaturationAliphaticAliphaticAliphaticAliphaticAliphaticAromaticAromaticComponentBaseHDIHDIHDIHDIHDIMDIMDINCO Content 24 24 2420 ± 120 ± 131.5 ± 5 24Isocyanate-ReactiveType of2°2°2°2°2°2°2°ComponentamineBasePPGPPGPPGPPGPPGPPGPPGMolecular23043040002000400020004000WeightCuring Agent3,3′-dimethyl-4,4′-bis(sec-butylamino)-dicyclohexylmethane(ratio of 1:0.95 prepolymer to curing agent)

[0313]A catalyst may be added to any of the above formulations to modify the cure rate. For example, dibutyltin dilaurate may be added in an amount of about 0.005 to about 0.01 percent based on total resin solids.

[0314]As used herein, the term “about” is used in connection with one or more numbers or numerical ranges, should be understood ...

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Abstract

Golf equipment including compositions including castable formulations that have comparable or improved resiliency and coefficient of restitution over that of conventional ionomers when formed into solid spheres. The compositions may be used in any layer of a golf ball including cores, intermediate layers, and covers.

Description

FIELD OF THE INVENTION[0001]The invention relates to compositions including castable formulations that have improved resiliency and coefficient of restitution. In addition, the invention is directed to golf equipment formed from the castable formulations. In particular, the present invention is directed to castable polyurea compositions that have comparable coefficient of restitution to conventional ionomers.BACKGROUND OF THE INVENTION[0002]Golf balls are formed from a variety of compositions, which provides a golf ball manufacturer the ability to alter feel and aerodynamic characteristics of a particular ball. For example, golf ball covers formed from balata allow a highly skilled golfer to achieve spin rates sufficient to more precisely control ball direction and distance, particularly on shorter shots. Balata covered golf balls are easily damaged, however, which discourages the average golfer from using such balls. To remedy this durability issue, manufacturers typically use iono...

Claims

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Application Information

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IPC IPC(8): A63B37/12
CPCA63B37/0065A63B37/0078A63B53/04A63B53/0487C08G18/7664A63B2209/00C08G18/4825C08G18/73A63B2053/0416A63B53/0416
Inventor RICCI, SHAWNPETRICHKO, RANDYSERDAHL, PETER
Owner ACUSHNET CO
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