GOLF BALL

• Main Authors: SHINOHARA HIROTAKA, SHIMIZU TAKUICHI, YAMABE MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 06.01.2023
• Subjects: AMUSEMENTS; APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING,CLIMBING, OR FENCING; BALL GAMES; CHEMISTRY; COMPOSITIONS BASED THEREON; GAMES; HUMAN NECESSITIES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; SPORTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRAINING EQUIPMENT

To provide a golf ball which, although the golf ball includes a silicone-based additive in an outer surface (a coating layer) of the golf ball, has a good spin performance on approach shots not only in a wet situation but also in a (normally) dry situation, and can exhibit both good water-repelling performance and good friction performance.SOLUTION: In a golf ball having a core, a cover, and a coating layer, the coating layer is formed of an urethane coating that includes an organic solvent having a boiling point of 80°C or less and a silicone-based additive, and the urethane coating includes a polyisocyanate as a curing agent. The polyisocyanate contains an adduct and an isocyanurate of hexamethylene diisocyanate (HMDI).SELECTED DRAWING: None 【課題】ゴルフボールの外表面（塗料層）にシリコーン系添加剤を含有しても、ウエット時のみならずドライ時（通常時）のアプローチスピン性能が良好となり、撥水性能と摩擦性能との両立が可能であるゴルフボールを提供することを目的とする。【解決手段】本発明は、コアとカバーと塗料層とを具備するゴルフボールであって、上記塗料層は、沸点８０℃以下の有機溶剤とシリコーン系添加剤とを含むウレタン塗料により形成され、該ウレタン塗料は、硬化剤としてポリイソシアネートを含み、ポリイソシアネートが、ヘキサメチレンジイソシアネート(ＨＭＤＩ）のアダクト体とイソシアヌレート体とを含むことを特徴とするゴルフボールを提供する。【選択図】なし