Golf balls having two core layers formed from HNP compositions
US7731606B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2008 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Jul 17, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention is directed to golf balls consisting of a dual-layer core and a cover. The core consists of a center having a center hardness of 50 Shore C or greater and formed from a first HNP composition, and an outer core layer having a surface hardness of 75 Shore C or greater and formed from a second HNP composition. The first HNP composition has a material hardness of 55 Shore D or less and comprises a highly neutralized ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer. The second HNP composition has a material hardness of 45 Shore D or greater and comprises a highly neutralized ethylene/(meth)acrylic acid copolymer. The material hardness of the first HNP composition is less than the material hardness of the second HNP composition. The cover consists of an inner cover layer formed from a thermoplastic composition and an outer cover layer formed from a polyurethane or polyurea composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.