Improved multi-layer golf ball

Details Improved multi-layer golf ball Improved multi-layer golf ball

A - Human Necessities

63

B

A63B 37/06 (2006.01) A63B 37/00 (2006.01) A63B 37/12 (2006.01) C08F 8/44 (2006.01) C08L 9/00 (2006.01) C08L 23/08 (2006.01)

Patent

CA 2362791

Disclosed herein is a multi-layer golf ball (18) having a soft outer cover (12). The golf ball (18) has an inner cover layer (14) with a Shore D hardness of 60 or more, and an outer cover (12) with a Shore D hardness of 55 or less, and more preferably 50 or less. In a particulary preferred form of the invention, the outer cover (12) comprises at least 75 % of a soft copolymer formed from a polyolefin, an unsaturated carboxylic acid, and a monomer of the acrylate ester class. The golf ball (18) of the invention has exceptionally soft feel and high spin rates on short shots of 80 yards or less and, particularly, 40 yards or less, while maintaining good distance and average spin on full shots.

L'invention concerne une balle de golf (18) multicouche comprenant un revÚtement ext~rieure (12) souple. Cette balle de golf (18) comprend une couche de revÚtement int~rieure (14) pr~sentant une duret~ Shore D sup~rieure ou ~gale ~ 60, et un revÚtement ext~rieur (12) pr~sentant une duret~ Shore D inf~rieure ou ~gale ~ 55, et plus avantageusement inf~rieure ou ~gale ~ 50. Dans un mode de r~alisation pr~f~r~ de l'invention, le revÚtement ext~rieur (12) comprend au moins 75 % d'un copolym­re souple form~ ~ partir d'un polyol~fine, d'un acide carboxylique non satur~, et d'un monom­re de la cat~gorie des esters d'acrylate. La balle de golf (18) de la pr~sente invention fournit une sensation de souplesse et pr~sente des vitesses de rotation ~lev~es lors de petits coups inf~rieurs ou ~gaux ~ 80 yards, en particulier inf~rieurs ou ~gaux ~ 40 yards, tout en permettant de maintenir une bonne distance et une rotation moyenne lors des longs coups.

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