发明名称 |
Golf balls having a core layer made from plasticized thermoplastic compositions |
摘要 |
Multi-layered golf balls containing a dual-core structure are provided. The core structure includes an inner core (center) comprising a thermoplastic composition, preferably including: a) ethylene acid copolymer, b) plasticizer, and c) cation source. Preferably, a fatty acid ester such as ethyl oleate is used as the plasticizer. The outer core layer is preferably formed from a thermoset composition such as polybutadiene rubber. The core layers have different hardness levels. The core assembly preferably has a positive hardness gradient extending across the entire assembly. The core structure and resulting ball have relatively good resiliency at given compressions. |
申请公布号 |
US9526948(B2) |
申请公布日期 |
2016.12.27 |
申请号 |
US201414460416 |
申请日期 |
2014.08.15 |
申请人 |
Acushnet Company |
发明人 |
Sullivan Michael J.;Binette Mark L.;Blink Robert;Bulpett David A.;Comeau Brian |
分类号 |
A63B37/06;A63B37/00;A63B37/02 |
主分类号 |
A63B37/06 |
代理机构 |
|
代理人 |
Sullivan Daniel W. |
主权项 |
1. A core assembly for a golf ball, comprising:
i) an inner core layer comprising a thermoplastic composition, the inner core having an outer surface hardness (Hinner core surface) and a center hardness (Hinner core center), the Hinner core surface being greater than the Hinner core center to provide a positive hardness gradient, the thermoplastic composition comprising;
a) an acid copolymer of ethylene and an α,β-unsaturated carboxylic acid, optionally including a softening monomer selected from the group consisting of alkyl acrylates and methacrylates;b) a plasticizer; andc) a cation source present in an amount sufficient to neutralize from about 0 to about 100% of all acid groups present in the composition; and ii) an outer core layer comprising a thermoset rubber composition, the outer core layer being disposed about the inner core layer and having an outer surface hardness (Houter surface of OC) and a midpoint hardness (Hmidpoint of OC), the Houter surface of OC being greater than the Hmidpoint of OC to provide a positive hardness gradient, wherein the center hardness of the inner core (Hinner core center) is in the range of about 10 Shore C to about 70 Shore C and the outer surface hardness of the outer core layer (Houter surface of OC) is in the range of about 20 Shore C to about 95 Shore C to provide a positive hardness gradient across the core assembly. |
地址 |
Fairhaven MA US |