Multi-piece golf balls having a multi-layered solid core and multi-layered cover are provided.

Multi-piece golf balls having a multi-layered solid core and multi-layered cover are provided.

Golf ball comprising at least one layer consisting of a double network cross-linked composition comprising a mixture of a base thermoset polymer composition and a double network polymer composition. The double network polymer composition comprises a plurality of particulates of a polymer composition that is elongated from 10% to 200%, or at least 50%, or at least 100% or at least 150% or 200% or greater during a partial cure state.

Golf ball comprising at least one layer consisting of a double network cross-linked composition comprising a mixture of a base thermoplastic polymer composition and a double network polymer composition. The double network polymer composition comprises a plurality of particulates of a polymer composition that is elongated from 10% to 200%, or at least 50%, or at least 100% or at least 150% or 200% or greater during a partial cure state.

Golf ball comprising cast layer of thermoset polymer mixture having centering time Ct.sub.1 and comprising: (i) a polyurethane composition, polyurea composition, and/or polyurethane/polyurea hybrid composition; and (ii) a treated fumed silica compound in an amount such that centering time Ct.sub.1 is independent of the thermoset polymer mixture's degree of cure and lower than a centering time Ct.sub.2 of the thermoset polymer composition (which is dependent on its gel window G.sub.w). The treated fumed silica compound may be surface treated with at least one of polydimethylsiloxane, hexamethyldisilazane, and dimethyldichlorosilane. In some embodiments, delta time t.sub.1 between a dispensing time D.sub.t1 of the thermoset polymer mixture and centering time Ct.sub.1 is less than a delta time t.sub.2 between Ct.sub.1 and centering time Ct.sub.2. Centering time Ct.sub.1 and dispensing time D.sub.t1 may differ by less than 10 seconds or even by 5 seconds or less.

Multi-piece golf balls having a multi-layered solid core and multi-layered cover are provided.

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.

Golf ball having CoR of at least 0.700 and Atti compression of at least about 50 and comprising layer consisting of mixture of thermoset or thermoplastic composition and plurality of particulates, at least a portion surface-treated with alkoxylated siloxanes and/or polyether-modified siloxanes, and may be selected from titanium dioxide particles, barium sulfate particles, zinc sulfide particles, and/or zinc oxide particulates. At least some particulates are contacted with compound having the formula: ##STR00001## Compound (I) may be included in amount of 0.01 to 2% by weight based on total weight of portion of plurality being contacted. The plurality may be included in mixture in amount such that layer has specific gravity of from 0.5 to about 10.0, tensile strength of from about 300 psi to about 50,000 psi, and elongation at break of from about 20% to about 1000%, each being greater than that of the thermoset or thermoplastic composition portion of the mixture.

Multi-piece golf balls containing a multi-layered core structure are provided. The core structure includes a small, heavy inner core (center) having a relatively high specific gravity, an intermediate core layer, and a surrounding outer core layer. The layers of the core structure may have different hardness gradients. The center of the core comprises a metal material such as copper, steel, brass, tungsten, titanium, aluminum, and alloys thereof dispersed in a thermoset polymeric matrix. The intermediate core layer is preferably formed from a first thermoplastic composition such as an ethylene acid copolymer ionomer resin; and the outer core layer is preferably formed from a second thermoplastic composition. The resulting ball has high resiliency and good spin control.

A polyurethane coating that is based on polyol mixture containing acrylic polyol and BEPD based caprolcatone polyol is disclosed herein. The polyurethane coating comprises a part A component and a part B component, with the part A component comprising an acrylic polyol, a BEPD polyol, a 3-Oxazolidineethanol, a fluorosurfactant, a hindered amine light stabilizer, a UV-absorber, an optical brightener, a dibutyltin dilaurate catalyst, and an organic solvent, and the part B component comprising an aliphatic polyisocyanate and an organic solvent.