Patent ID: 9682283
Date: 2017-06-20
CPC Classifications: A63B,B29C,B29K,B29L,C08J

Claim:
1. A golf ball comprising a core and a cover of one or more layer encasing the core, wherein the cover has an outermost layer molded of an ether type thermoplastic polyurethane material, and a surface of the cover is treated with a polyisocyanate compound that is free of organic solvent, wherein the rebound resilience of the outermost layer prior to the above surface treatment is at least 35%, and wherein the polyisocyanate compound is a mixture of 4,4′-diphenylmethane diisocyanate (MDI) and polymethylene polyphenyl polyisocyanate containing 41 to 59% by weight of MDI and the viscosity at 25° C. of the polyisocyanate compound is from 25 to 180 mPa·s.