Abstract:
Golf ball and method for making it, comprising a first layer that comprises a first polymeric composition and is surrounded by and adjacent to a second layer comprising a second polymeric composition different than the first polymeric composition; with one of these layers further comprising at least one silane-containing adhesion promoter such as organosilanes and/or organosiloxanes throughout in an amount of from about 0.1 wt. % to about 5.0 wt. % of the entire layer. Neither layer is surface treated with at least one silane-containing adhesion promoter. The second layer may be the layer comprising the silane-containing adhesion promoter throughout, surrounded by a third layer that comprises a third polymeric composition that differs from the second polymeric composition and does not incorporate any silane-containing adhesion promoter. Strong interlayer bonding is therefore created both between the second layer and the first layer and between the second layer and the third layer.
Abstract:
Golf ball comprising at least one layer LS comprising material LM formed from a polymeric composition and a plurality of liquid droplets that are formed throughout the polymeric composition by combining the polymeric composition and a liquid that is immiscible in the polymeric composition. The polymeric composition has a modulus MS1 and material LM has a modulus MS2 wherein (MS2/MS1)>1. The polymeric composition may comprise at least one polyurethane, polyurea, ionomer, polyamide, polyester, polyolefin, and/or silicone. The liquid may be, for example, at least one of ionic liquids, alcohols, glycols, glycerol, silicone oils, hydrocarbon oils, or liquid fatty acids. Liquid droplet diameter may be up to about 100 nm or up to about 100 μm, and a droplet may be spherical or aspherical, and sometimes be oblate or prolate. An aspherical droplet may be ovoid or ellipsoid. MS2 may be from about 1,000-80,000 psi.; or 70,000-500,000 psi or greater.
Abstract:
A golf ball including an inner core having a first outer surface and a geometric center and being formed from a first substantially homogenous composition such that the inner core has a hardness of about 60 Shore C to about 90 Shore C; an outer core layer disposed about the inner core having a second outer surface and being formed from a second substantially homogenous composition such that the outer core layer has a hardness of about 60 Shore C to about 95 Shore C; and a cover layer disposed about the outer core layer. The geometric center and first and second outer surfaces each have a hardness, the hardness of the second outer surface being lower than the hardness of the geometric center to define a negative hardness gradient.
Abstract:
A golf ball comprising a core and a cover layer, wherein at least one of the core or cover layer comprises a plasticized polyurethane composition comprising at least one polyurethane and at least one plasticizer.
Abstract:
Multi-layered golf balls containing a dual-core structure are provided. The core structure includes an inner core (center) comprising a foam composition, preferably foamed polyurethane. The outer core layer is preferably formed from a non-foamed composition selected from thermoset compositions and thermoplastic compositions. The core layers have different hardness and specific gravity levels. The specific gravity (density) of the foam inner core is preferably less than the density of the outer core layer.
Abstract:
The present invention is directed to thermoset rubber compositions comprising from 1 phr to 20 phr of a zinc ionomer. The thermoset rubber composition is used to form at least one layer of a one-piece, two-piece, or multi-layer golf ball.
Abstract:
Multi-layered golf balls having at least one layer made of a foamed silicone composition are provided. Multi-layered golf balls having at least one layer made of non-foamed silicone elastomer composition also are provided. For example, three-piece, four-piece, and five-piece golf balls containing different core and cover structures can be made. The foamed silicones have good thermal stability and durability without sacrificing resiliency. The non-foamed silicone elastomers have high elongation, tensile strength, chemical/fluid-resistance, and weatherability properties. These compositions can be used to form any layer, for example, core, intermediate, or cover, in the golf ball.
Abstract:
Multi-piece golf balls having a solid core of at least one layer and cover of at least one layer are provided. At least one of the layers is formed from a thermoplastic polyamide composition, comprising a blend of polyamide, ethylene acid copolymer ionomer, fatty acid amide, and plasticizer. A polyamide having a transparent optical nature is preferably used in the composition. A fatty acid ester such as dipropylene glycol dibenzoate and propylene carbonate is preferably used as the plasticizer. The ball may contain an inner core and surrounding outer core layer. A rubber composition is preferably used to form the inner core and the polyamide-based composition is preferably used to form the outer core layer.
Abstract:
The present invention is directed to golf balls consisting of a multi-layer core and a cover. The multi-layer core includes at least one layer formed from a relatively soft or low modulus HNP composition and at least one layer formed from a relatively hard or high modulus HNP composition.
Abstract:
A golf ball includes a core having an outer surface and a geometric center. The core is formed from a substantially homogenous rubber composition. An ionomeric inner cover layer is formed about the core and has a material hardness of about 60 Shore D or greater. The golf ball includes an outer cover layer formed from a polyurea or a polyurethane and having a material hardness of about 60 Shore D or less. The outer surface of the core has a trans content of about 12% or less and a hardness of about 71 to 88 Shore C. The geometric center of the core has a trans content of about 10% or less and a hardness of about 60 to 80 Shore C. The core has an outer surface hardness greater than a geometric center hardness by about 5 to 19 Shore C to define a positive hardness gradient.