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US 2003/0120020 A1Published application
Golf ball having a polyurethane cover
AssigneeSumitomo Rubber Industries, Ltd.
InventorsMasatoshi Yokota, Kaname Yamada, Seigou Sakagami
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Abstract
The invention is intended to provide a solid golf ball having a polyurethane cover having satisfactory formability and ball properties. The golf ball of the present invention provides the good shot feeling, the controllability, and the resilience by adjusting the hardness and the thickness of the polyurethane cover, and the hardness of the whole golf ball. Further, the formability of the polyurethane cover has been improved by controlling the amount of residual isocyanate monomer contained in the isocyanate group-terminated urethane prepolymer.
Claims13
A golf ball comprising
- a solid core composed of at least one layer, and
- a polyurethane cover for covering the solid core, wherein
- the polyurethane cover has a thickness of from 0.2 to 0.5 mm, and is formed from a cured urethane composition having Shore D hardness of from 30 to 55;
- the urethane composition comprises an isocyanate group-terminated urethane prepolymer and an aromatic polyamine compound;
- and
- a deformation amount of the golf ball is from 2.40 to 3.30 mm when applying a load from 98N as a initial load to 1275N as a final load to the golf ball.
3 more elements
Dependencies are inferred from the claim text.