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US 8,044,164 B2Granted
Golf ball
AssigneeSRI Sports Limited
InventorsKazuyoshi Shiga, Takashi Sasaki, Mikio Yamada
Life of this patent
Estimating the term…
Abstract
A golf ball which has excellent abrasion-resistance and spin performance is provided. The golf ball of the present invention includes a core and a cover covering the core. The cover contains, as a resin component, polyurethane which is obtained using, as a polyisocyanate component constituting the polyurethane, 4,4′-dicyclohexylmethane diisocyanate having a mole ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 3/7 to 9/1.
Claims13
A golf ball comprising:
- a core;
- a cover covering the core and containing polyurethane as a resin component,
- wherein the polyurethane comprises 4,4′-dicyclohexylmethane diisocyanate having a molar ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 3/7 to 6/4 as a polyisocyanate component constituting the polyurethane;
- and
- polyol having a molecular weight of 800 or less as a chain extender component constituting the polyurethane.
2 more elements
A golf ball comprising:
- a core;
- a cover covering the core and containing polyurethane as a resin component,
- wherein the polyurethane comprises
- 4,4′-dicyclohexylmethane diisocyanate having a molar ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 3/7 to 6/4 as a polyisocyanate component constituting the polyurethane,
- polytetramethylene ether glycol as a polyol component constituting the polyurethane;
- and
- polyol having a molecular weight of 800 or less as a chain extender component constituting the polyurethane.
4 more elements
Dependencies are inferred from the claim text.