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Golf ball

Inactive Publication Date: 2013-12-05
DUNLOP SPORTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a golf ball with a hardness distribution that results in low energy loss and spin rate when hit. This results in a long flight distance.

Problems solved by technology

With a golf ball that achieves a high trajectory by a high spin rate, a flight distance is insufficient.
When a backspin rate is high, the run is short.

Method used

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Examples

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example 1

[0722]A rubber composition was obtained by kneading 100 parts by weight of a high-cis polybutadiene (trade name “BR-730”, manufactured by JSR Corporation), 23 parts by weight of zinc diacrylate (trade name “Sanceler SR”, manufactured by SANSHIN CHEMICAL INDUSTRY CO., LTD.), 5 parts by weight of zinc oxide, an appropriate amount of barium sulfate, 0.3 parts by weight of bis(pentabromophenyl)disulfide, and 0.8 parts by weight of dicumyl peroxide. This rubber composition was placed into a mold including upper and lower mold halves each having a hemispherical cavity, and heated at 170° C. for 25 minutes to obtain a center with a diameter of 15.0 mm.

[0723]A first rubber composition was obtained by kneading 100 parts by weight of a high-cis polybutadiene (the aforementioned “BR-730”), 25 parts by weight of zinc diacrylate (the aforementioned “Sanceler SR”), 5 parts by weight of zinc oxide, an appropriate amount of barium sulfate, 0.2 parts by weight of 2-thionaphthol, 0.8 parts by weight ...

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Abstract

A golf ball 2 includes a core 4, amid layer 6, and a cover 10. The core 4 includes a center 16, a first envelope layer 18, and a second envelope layer 20. The first envelope layer 18 is formed by a first rubber composition being crosslinked. The second envelope layer 20 is formed by a second rubber composition being crosslinked. The first rubber composition and / or the second rubber composition include: a base rubber; a co-crosslinking agent; a crosslinking initiator; and an acid and / or a salt. The co-crosslinking agent is (1) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms; and / or (2) a metal salt of an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms.

Description

[0001]This application claims priority on Patent Application No. 2012-124406 filed in JAPAN on May 31, 2012. The entire contents of this Japanese Patent Application are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to golf balls. Specifically, the present invention relates to golf balls that include a core having a three-layer structure, amid layer, and a cover.[0004]2. Description of the Related Art[0005]Golf players' foremost requirement for golf balls is flight performance. In particular, golf players place importance on flight performance upon a shot with a driver. Flight performance correlates with the resilience performance of a golf ball. When a golf ball having excellent resilience performance is hit, the golf ball flies at a high speed, thereby achieving a large flight distance. Golf balls that include a core having excellent resilience performance are disclosed in JP61-37178, JP2008-212681 (US...

Claims

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Application Information

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IPC IPC(8): A63B37/00
CPCA63B37/0054C08K5/0025C08K5/098A63B37/0051A63B37/0076A63B37/0063A63B37/0064A63B37/0003A63B37/0039A63B37/00922C08L21/00A63B37/00A63B37/06
Inventor TACHIBANA, KOSUKEISOGAWA, KAZUHIKO
Owner DUNLOP SPORTS CO LTD