A - Human Necessities – 63 – B
Patent
A - Human Necessities
63
B
A63B 37/06 (2006.01) A63B 37/00 (2006.01)
Patent
CA 2465780
The present invention is directed to a golf ball including a solid, molded core formed from a core composition having a polybutadiene rubber exhibiting a solution viscosity greater than 70 mPa.s, preferably greater than about 80 mPa.s, and more preferably greater than about 100 mPa.s. The core preferably exhibits a coefficient of restitution of at least about 0.780. The present invention is also directed to methods for making compositions having particular coefficient of restitution values formed from polybutadiene rubbers with solution viscosity values related to the coefficient of restitution value of the composition. As the solution viscosity for the polybutadiene rubber has a higher value, the coefficient of restitution of the core also increases. Preferably, a solid, molded core is formed from the present method, and/or a golf ball comprising such a core.
Cette invention a trait à une balle de golf dont le noyau moulé et solide est fait à partir d'une composition à base de caoutchouc polybutadiène dont la viscosité en solution est supérieure à 70 MPa, de préférence, à 80 MPa environ et, mieux encore, à 100 MPa environ. Le coefficient de restitution du noyau est, de préférence, supérieur à 0,780 environ. L'invention porte également sur des procédés de fabrication de compositions, dotées de valeurs particulières de coefficient de restitution, produites à partir de caoutchouc polybutadiène dont les valeurs de viscosité en solution sont en rapport avec la valeur du coefficient de restitution. Plus la viscosité en solution du caoutchouc polybutadiène est élevée, plus ce coefficient augmente. Ce procédé permet de produire un noyau moulé et solide ainsi qu'une balle de golf le renfermant.
Callaway Golf Company
Macrae & Co.
LandOfFree
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