Patent ID: 6197884
Filing Date: 2001-03-06
Classification: A63B,C08F,C08L

Abstract:
A golf ball comprising a cover, a core and at least one intermediate layer disposed concentrically between the cover and the core, wherein the at least one intermediate layer is comprised of a first component including a first acid copolymer or an ionomer derivative of said first copolymer having a melt index of from about 0.1 to 30.0 g/10 min., said first copolymer comprising an ethylene/carboxylic acid copolymer consisting of about 5 to about 35 percent by weight acrylic or methacrylic acid polymerized at a temperature of from about 130.degree. C. to 200.degree. C. and a pressure of from about 20,000 psi to about 50,000 psi, the first component has a melting point and a freezing point substantially greater than that of a corresponding acid copolymer or ionomer derivative thereof formed at a polymerization temperature greater than 200.degree. C., and wherein, when said first component is said ionomer derivative, up to about 75 percent of acid groups in the ionomer derivative are neutralized with a metal ion.