US 7,549,936 B2
	Golf ball with intermediate layer containing an expandable polymer
Derek A. Ladd, Acushnet, Mass. (US); and Matthew F. Hogge, New Bedford, Mass. (US)
Assigned to Acushnet Company, Fairhaven, Mass. (US)
Filed on Apr. 15, 2005, as Appl. No. 11/106,926.
Prior Publication US 2006/0234812 A1, Oct. 19, 2006
Int. Cl. A63B 37/06 (2006.01)

U.S. Cl. 473—373

9 Claims

1. A multilayer golf ball comprising a core, an intermediate layer, and a cover, wherein the intermediate layer comprises an expandable polymeric composition, wherein the expandable polymeric composition expands from 5% to 200% of its pre-expand thickness when the expandable polymeric composition is exposed to a triggering environmental factor, wherein the expandable polymeric composition comprises an aqueous acrylic based latex emulsion and an unencapsulated blowing agent.