Abstract:
A golf ball comprising: an inner core formed from a first substantially homogenous rubber composition comprising a carbon-carbon initiator, the inner core having a geometric center and a first outer surface having a hardness less than that of the geometric center by up to about 20 Shore C; an outer core layer disposed about the inner core formed from a second substantially homogenous rubber composition and comprising a second outer surface having a hardness that is up to about 43 Shore C points greater than the hardness of the geometric center; an inner cover layer disposed about the core comprising an ionomeric material and having a material hardness of about 55 Shore D or greater; an outer cover layer disposed about the inner cover layer comprising a polyurea or polyurethane and having a material hardness of 20 Shore D to 70 Shore D.
Abstract:
Golf ball multi-layered core sub-assemblies and the resulting golf balls are provided. The core structure includes a foam inner core (center); and intermediate and outer core layers. Foamed polyurethane is preferably used to make the inner core. The intermediate and outer core layers are preferably made from non-foamed thermoplastic compositions such as ethylene acid copolymer ionomer. In an alternative version, the intermediate core layer may be made of a thermoset rubber such as polybutadiene. The core layers have different hardness and specific gravity levels. The core structure and resulting ball have relatively good resiliency.
Abstract:
Multi-layered golf balls having at least one layer made of a polyamide composition containing a polyamide polymer and plasticizer are provided. The plasticizers help reduce the glass transition temperature (Tg) of the composition and various plasticizers may be used. For example, the composition may include ethyl oleate or propylene carbonate as a plasticizer. Transparent polyamides, for example, polyether-amide block copolymers, preferably are used in the composition. The golf ball includes a core having at least one layer and a cover having at least one layer. The polyamide composition may be used to form any core, cover, or other layer in the golf ball. In one version, the polyamide composition is used to form the inner cover layer.
Abstract:
Multi-layered golf ball core sub-assemblies and the resulting golf balls are provided. The core structure includes an inner core (center) comprising a foam composition, preferably foamed polyurethane. The intermediate and outer core layers are preferably formed from non-foamed thermoset compositions such as polybutadiene rubber. The core layers have different hardness and specific gravity levels. The core structure and resulting ball have relatively good resiliency.
Abstract:
The present invention generally relates to golf balls and more particularly to golf balls having multi-layered cores comprising a thermoset rubber center, a thermoplastic intermediate core layer, and a thermoset rubber outer core layer. A cover layer is disposed about the multi-layered core. At least one of the center, intermediate core layer, and outer core layer comprises a polyalkenamer rubber. The polyalkenamer rubber may be blended with other rubbers such as polybutadiene, polyisoprene, ethylene propylene diene, and styrene-butadiene rubbers. The polyalkenamer rubber composition helps improve resiliency of the core and provides the ball with a comfortable and soft feel.
Abstract:
Disclosed herein are heterogeneous golf ball compositions comprising a matrix formed from a thermosetting polymer composition and discrete particles of crosslinked rubber dispersed within the matrix.
Abstract:
Golf ball comprising a single layer core formed from a substantially homogenous formulation and comprising: geometric center and outer surface; inner core region disposed about the geometric center, outer core region adjacent the outer surface, and intermediate core region disposed between the inner and outer core regions and extending radially from about 10 mm to about 16 mm from the geometric center. A first hardness is disposed within the inner core region, a second hardness is disposed within the outer core region, and a third hardness of from about 40 Shore C to about 95 Shore C (or about 30 Shore D to about 70 Shore D) is disposed within the intermediate core region and is greater than each of the first and second hardnesses. At least one hardness in the outer core region is substantially the same as or less than a hardness in the inner core region.
Abstract:
A hollow golf ball includes a spherical inner core shell layer formed from a first thermoplastic composition, the shell layer having an outer surface, an inner surface, and an inner diameter to define a hollow center. An outer core layer is formed about the shell layer and includes a thermoset rubber composition. An inner cover layer is formed about the outer core layer and includes an ionomeric material. An outer cover layer is formed about the inner cover layer. The outer cover includes a polyurea or a polyurethane and has a hardness less than the inner cover layer. The hollow center has a diameter of about 0.15 to 1.1 inches, the shell layer has a surface hardness greater than an inner surface hardness by about 0 to 5 Shore C to define a first hardness gradient, and the thermoset outer core layer has a second hardness gradient.
Abstract:
Disclosed herein are heterogeneous golf ball compositions comprising a matrix formed from a thermosetting polymer composition and discrete particles dispersed within the matrix.
Abstract:
Disclosed herein are heterogeneous golf ball compositions comprising discrete particles of crosslinked rubber dispersed within an acid copolymer-based matrix.