A golf ball material includes (A) one or more resin ingredient selected from the group consisting of olefin-unsaturated carboxylic acid random copolymers, olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester random copolymers, and metal ion neutralization products of these copolymers; (D) an amino compound having at least 2 amino groups per molecule; (B) one or more resin ingredient selected from the group consisting of polyethylene, polyesters and polyamide elastomers; and (C) an agent for compatibilizing components (A) and (B). The compatibilizing agent (C) includes: (C-i) two different types of base polymer selected from a specific group, (C-ii) a hydrogenated diene polymer having at least one type of functional moiety selected from a specific group of moieties, and (C-iii) an olefinic polymer having at least one type of functional moiety selected from a specific group of moieties.

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.

The present invention provides a golf ball comprising an inner core and an outer cover layer, wherein at least one of the inner core and outer cover layer is formed from a thermoplastic polyurethane ionomer.

Golf ball having CoR of at least 0.700 and compression of at least 50 and comprising a layer of a mixture of thermoset or thermoplastic composition and a plurality of conductive nanoshelled structures such as conductive hollow nanoshells and/or nanorice particles. Conductive nanoshelled structures may be included in amount of from about 2 wt % to greater than 50 wt. % of total weight of mixture. Diameter of each conductive nano shelled structure at widest cross-section may be up to 1000 nm. Each conductive hollow nanoshell may have shell thickness to longitudinal diameter ratio of from about 1:3 to about 1:100. Each nanorice particle may have longitudinal diameter of up to 1000 nm. Shell thickness can be from 1 nm to 100 nm and may be controlled. A layer consisting of mixture may have specific gravity that differs from specific gravity of a layer consisting of the thermoset or thermoplastic composition portion of mixture.

A golf ball with a cover formed by spraying is disclosed herein. In the present invention, a mixture of a low viscous diisocyanate component and a diamine free of organic solvent are sprayed onto a mantle insert to form a cover layer for a golf ball. A rapid reaction occurs and a solid layer forms within ten seconds. The polyurea material is extremely durable so that the cover layer performs with excellent shear cut durability.

Golf balls comprising a multi-layer core and a cover are disclosed. The multi-layer core comprises a layer formed from a highly neutralized polymer composition and a layer formed from a thermoset rubber.

Golf balls having a core, intermediate layer, and shape memory polymer cover are provided. The ball includes a non-foamed inner core (center) made of a thermoplastic or thermoset composition such as polybutadiene rubber. A cover having at least one layer is disposed about the core and intermediate layer. An SMP is used in the outermost layer of a golf ball. SMPs may be used in any layers of the golf ball to achieve reversible deformability.

A golf ball core for use in a multi-piece golf ball includes a solid sphere and between 100 and 300 spaced polygonal protrusions extending from the solid sphere in a radially outward direction. The sphere is substantially formed from an ionomeric material, and has a diameter (D) of between 24 mm and 32 mm. The polygonal protrusions extend from the sphere by a maximum distance of between 0.15 mm and 1.0 mm.

Golf ball having at least three layers comprising ionomeric and/or HNP compositions, wherein for each two adjacent layers, a relationship is established between a ratio of the volumes of the two adjacent layers and a ratio of the percent neutralizations of those two layers such that the volumes and % neutralizations of all layers are interrelated and interdependent to produce unique and desirable playing characteristics. In one embodiment, a golf ball of the invention has T layers, wherein T3 and each of T layers has a different volume V and comprises an ionomeric and/or HNP composition having a different % neutralization N. Furthermore, each of n inner layers of the T layers (n<T) has an adjacent surrounding layer n+1 such that a volume V.sub.n and a % neutralization N.sub.n of each inner layer and a volume V.sub.(n+1) and % neutralization N.sub.(n+1) of each adjacent surrounding layer n+1 satisfy the relationship (V.sub.nV.sub.(n+1))/V.sub.n(N.sub.nN.sub.(n+1))/N.sub.(n+1).