Patent ID: 7537814
Filing Date: 2009-05-26
Classification: A63B,C08G,C08L,Y10T

Abstract:
1. A soccer ball containing a bladder comprising a film made from a formulation comprising an aqueous dispersion; the aqueous dispersion comprising an unsaturated polyurethane, at least a portion of which comprises at least one anionic, cationic, allyl, or vinyl group; and latex comprising an elastomeric polymer; the unsaturated groups of the polyurethane being capable of chemically bonding with the latex; wherein the film has an air permeability not greater than 3.5×10 −5 cm 3 -cm/m 2 -hour-Pa at 25° C. and wherein said air permeability is calculated as: wherein a pressure differential of 50 psig is maintained during measurement.