Solid golf ball

Details Solid golf ball Solid golf ball

2006-01-17

2006-01-17

Buttner, David J. (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C528S063000, C473S378000

Reexamination Certificate

active

06987159

ABSTRACT:
A solid golf ball with a polyurethane cover having satisfactory formability and ball properties. The solid golf ball has a solid core, and a polyurethane cover for covering the solid core, wherein the difference in Shore D hardness between a center portion and a surface portion of the solid core is at least 15; the polyurethane cover has a thickness (t) of not more than 1.0 mm, and is formed from a cured urethane composition having Shore D hardness (D) of from 35 to 60; a product of the thickness(t) and the Shore D Hardness (D) of the cured urethane composition is ranging from 10 to 45(10≦D×t≦45); and the urethane composition contains an isocyanate group-terminated urethane prepolymer having the residual polyisocyanate monomer content of not more than 0.1 mass %, and an aromatic polyamine compound.

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patent: 6686436 (2004-02-01), Iwami
patent: 199923581 (1998-10-01), None
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patent: H 9-215778 (1997-08-01), None
Thain, Science and Golf IV, pp. 319-327; 2002.

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