Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-01-25
2005-01-25
Buttner, David J. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S184000, C525S274000, C473S378000, C473S385000
Reexamination Certificate
active
06846879
ABSTRACT:
A golf ball providing resistance to abrasion and resistance to wear generally in an excellent balance is formed of a core and a cover arranged to cover the core, the cover being formed of a compound containing relative to 100 parts by mass of a polymer component thereof composed mainly of polybutadiene rubber 1-40 parts by mass of a reinforcement material formed of organic short fiber and 10-40 parts by mass of a metallic salt of α,β-ethylene unsaturated carboxylic acid. It is characterized in that the organic short fiber is suitably a ternary composite formed of a rubber component, a polyolefin component and a nylon component and the metallic salt of α,β-ethylene unsaturated carboxylic acid is suitably zinc acrylate, zinc methacrylate, magnesium acrylate or magnesium methacrylate.
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Yamamoto et al., Nihon Reoroji Gakkaishi vol. 25, No. 5, 1997, pp. 275-282.
Buttner David J.
Sumitomo Rubber Industries Ltd.
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