Patent ID: 8371970

Claim:
A ball amusement device comprising: an outer shell of transparent or semi-transparent elastomeric polyurethane having good bounce characteristics; wherein the elastomeric polyurethane of the outer shell is an MDI-based polyurethane; water within and filling the shell, wherein the ball amusement device has good bounce characteristics; and wherein the transparent or semi-transparent outer shell is configured with a roughened or textured surface to reduce the transparency to light through the ball; wherein the composition of the polyurethane elastomer includes at least one of isocyanate, polyol, and a chain extender, wherein the isocyanate is a methylene diphenyl diisocyanate with 25 wt % of the polyurethane elastomer, the polyol is at least one of a polyester and a polyether type polyol, the polyol has at least two functional OH groups on an molecular chain of the polyol, and the polyol constitutes 70 wt % of the polyurethane with MW1000˜10000, the chain extender has at least two functional OH group or at least two NH2 functional group, constitutes 5 wt % of the polyurethane, and has short chain molecules with MW50˜800, and the polyurethane elastomer has a density of 1.1˜1.2g/cm3 and a hardness of 70A˜90A.