| 摘要 |
<p>PROBLEM TO BE SOLVED: To prolong the applicability period of a golf ball coating material containing a 2-liquid type polyurethane coating material and a curing catalyst. SOLUTION: The coating material is prepared by adding a curing catalyst and a substance, which combines with polyol hydroxyl groups for the formation of hydrogen bonds and vaporizes at 70 deg.C or lower, to a 2-liquid type polyurethane coating material comprising polyol and polyisocyanate.</p> |
