| US 7,387,821 B2 | ||
| Golf ball and process for preparing the same | ||
| Kazuhiko Isogawa, Kobe (Japan); and Takashi Sasaki, Kobe (Japan) | ||
| Assigned to SRI Sports Limited, Kobe-Shi (Japan) | ||
| Filed on Oct. 07, 2005, as Appl. No. 11/245,078. | ||
| Claims priority of application No. 2004-304783 (JP), filed on Oct. 19, 2004. | ||
| Prior Publication US 2006/0084757 A1, Apr. 20, 2006 | ||
| Int. Cl. A63B 37/14 (2006.01); A63B 37/00 (2006.01); C09D 175/04 (2006.01) | ||
| U.S. Cl. 427—393.5 [473/371; 473/378; 428/423.1; 428/423.3; 428/424.2; 524/839; 524/840; 525/457] | 16 Claims |
| 1. A golf ball comprising
a golf ball body, and
a paint film covering said golf ball body, wherein the paint film has a resin component which is a reaction product obtainable by reacting an aqueous polyurethane having
a carboxyl group with an aqueous polycarbodiimide having a hydrophilic segment;
the aqueous polycarbodiimide is an aqueous polycarbodiimide resin represented by the following chemical formula; and
a blending ratio of the aqueous polycarbodiimide to the aqueous polyurethane having the carboxyl group ranges from 0.9 to
1.5 at a molar ratio of carbodiimide group to carboxyl group, or carbodiimide group/carboxyl group,
 wherein R is a residue formed by removal of isocyanate groups from a diisocyanate, K represents a bond formed by a reaction
of an isocyanate group and the hydrophilic segment, and “n” represents an average degree of polymerization and is an integer
ranging from 2 to 100.
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