Patent ID: 7537814

Claim:
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: ( Flow ⁢ ⁢ rate ⁢ ⁢ of ⁢ ⁢ air ⁢ ⁢ in ⁢ ⁢ cm 3 ⁢ / ⁢ hour ) × ( Thickness ⁢ ⁢ of ⁢ ⁢ film ⁢ ⁢ in ⁢ ⁢ cm ) ( Permeation ⁢ ⁢ area ⁢ ⁢ of ⁢ ⁢ film ⁢ ⁢ in ⁢ ⁢ m 2 ) × ( Pressure ⁢ ⁢ differential ⁢ ⁢ across ⁢ ⁢ film ⁢ ⁢ in ⁢ ⁢ Pa ) wherein a pressure differential of 50 psig is maintained during measurement.