MULTI-LAYER GOLF BALL
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United States of America Patent
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Issued Date -
Mar 31, 2016
app pub date -
May 19, 2014
filing date -
May 31, 2013
priority date (Note) -
Abandoned
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Abstract
A golf ball has an ionomer resin core center, a cured rubber layer made from (a) an at least 70% cis-1,4 polybutadiene with Mooney viscosity (ML1+4(100° C.)) 40, (b) an unsaturated carboxylic acid or metal salt, and (c) a free radical initiator; and a cover including a thermoplastic material. The core center has a diameter of 21-29 mm and a 10-130 kg compression deformation (C) 4 mm. The core layer is 5 mm thick with a specific gravity 0.1 g/cm3 greater than that of the core center. The cover may have a flexural modulus 15,000 psi or ≦35,000 psi. Also disclosed is a golf ball with an ionomer core center having C1 3.5 mm, a cured rubber core layer 5 mm thick with C2 3 mm, and a cover with C3 2.8 mm, with C2/C1 and C3/C2 about 0.8-1.
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