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Bouncing ball amusement device having reduced transparency

  • US 8,371,970 B2
  • Filed: 05/12/2009
  • Issued: 02/12/2013
  • Est. Priority Date: 01/22/2009
  • Status: Expired due to Fees
First Claim
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1. 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, andthe polyurethane elastomer has a density of 1.1˜

    1.2g/cm3 and a hardness of 70A˜

    90A.

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