Patent ID: 7682266
Filing Date: 2010-03-23
Classification: A63B

Abstract:
1. A golf ball which comprises a spherical core, a mid layer positioned outside of the core, a cover positioned outside of the mid layer, and a reinforcing layer provided between said mid layer and said cover, said cover having a thickness Tc of equal to or less than 0.5 mm, said cover having a hardness Hc as measured with a Shore D type hardness scale of equal to or less than 47, said cover having a volume V of equal to or less than 2.4 cm a product obtained by multiplying the thickness Tc (mm), the hardness Hc and the volume V (cm a product obtained by multiplying the hardness (Hc) and the volume V (cm wherein a principal component of the base polymer of said cover is a thermoplastic polyurethane elastomer, and wherein a principal component of the base polymer of said mid layer is an ionomer resin, wherein an isocyanate component of the thermoplastic polyurethane elastomer is an alicyclic diisocyanate, and wherein a base polymer of said reinforcing layer is a two-component cured thermosetting resin obtained by curing a bisphenol A type epoxy resin with a polyamide based curing agent containing a polyamide amine or denatured product of the polyamide amine.