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US 8,138,298 B2Granted
Golf ball
AssigneeSRI Sports Limited
InventorsKazuyoshi Shiga, Takashi Sasaki, Mikio Yamada
Life of this patent
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Abstract
The object of the present invention is to provide a golf ball having excellent scuff resistance and spin performance. The present invention provides a golf ball which comprises a core and a cover covering the core. The cover contains a polyurethane as a resin component, and the polyurethane is obtained by employing a multimodal polyol having multimodality in molecular weight distribution, as a high-molecular-weight polyol component constituting the polyurethane.
Claims4
A golf ball comprising:
- a core;
- and
- a cover covering the core, wherein
- the cover contains a polyurethane as a resin component, and
- the polyurethane is obtained by employing a multimodal polyol having multimodality in molecular weight distribution, as a high-molecular-weight polyol component constituting the polyurethane;
- wherein the multimodal polyol is a mixture of the poly(tetramethylene ether) glycol (PTMG 1000) having a number average molecular weight of 900 to 1100 and a poly(tetramethylene ether) glycol (PTMG 2000) having a number average molecular weight of 1800 to 2200 at a molar ratio of from 3/7 to 6/4 (PTMG 1000/PTMG 2000);
- and
- wherein the polyurethane contains 4,4′-dicyclohexylmethane diisocyanate as a polyisocyanate component constituting the polyurethane.
5 more elements
Dependencies are inferred from the claim text.