| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf ball having a polyurethane cover which can satisfy the requirement for resilience and wear resistance. <P>SOLUTION: The polyurethane cover comprises a cured material obtained by curing an isocyanate-terminated urethane prepolymer with a phenylenediamine derivative represented by general formula (1) (wherein R<SP>1</SP>is a 1-9C alkyl group; R<SP>2</SP>and R<SP>3</SP>are each a methyl group, an ethyl group or a hydrogen atom; and X is a halogen atom), preferably a 4-chloro-3,5- diaminobenzoate. <P>COPYRIGHT: (C)2004,JPO</p> |
