Coating material for golf ball and golf ball coated with the same
AssigneeSumitomo Rubber Industries, Ltd.
InventorsKiyoto Maruoka, Akihiro Nakahara
Life of this patent
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Abstract
The present invention provides a coating material for a golf ball. The coating material comprises a polyol(1) containing a urethane polyol and a polyisocyanate. The urethane polyol is produced by the reaction between a diisocyanate and a polyol(2) containing as an essential ingredient a diol and a triol at the triol/diol equivalent ratio of 0.2 to 3. The urethane polyol has Mw of 4000 to less than 10000. The coating material is dryable in a short time at low temperatures and forms a coating layer having excellent resistance to scuffing and adhesion to a golf ball main body.
Claims12
A method of manufacturing a golf ball comprising the steps of:
- (a) providing a main body;
- (b) preparing a coating material which includes polyisocyanate and a first polyol including a urethane polyol;
- and
- (c) reacting a diisocyanate and a second polyol containing diol and triol as essential ingredients with triol/diol equivalent ratio being 0.3 to 3 to prepare said urethane polyol, the urethane polyol having a weight-average molecular weight in a range of 4000 inclusive to 10000 exclusive;
- and
- (d) applying said coating material on the surface of the main body to provide a coating layer made from said coating material.
Dependencies are inferred from the claim text.