Golf ball
US7976409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2009 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Jul 18, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/0075
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention provides a multi-piece solid golf ball having a core, an inner cover layer and an outer cover layer. The core is made of a material obtained by molding under applied heat a rubber composition containing (a) a base rubber containing polybutadiene having a stress relaxation time (T80) of 3.5 or less, (b) an unsaturated carboxylic acid and/or a metal salt thereof, and (c) an organic peroxide. The inner cover layer has a Shore D hardness of from 50 to 80, the outer cover layer has a Shore D hardness of from 35 to 60 which is lower than the Shore D hardness of the inner cover layer, and the inner cover layer is formed primarily of a specific, highly neutralized resin mixture. The golf ball as a whole has an excellent rebound, a good, soft feel on impact, and an outstanding spin performance, and is capable of achieving an increased distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.