摘要:
Multi-piece, solid golf balls having a cover material made from a polyurethane/urea hybrid composition are provided. The balls include an inner core preferably made of polybutadiene and may include at least one intermediate layer disposed between the core and outer cover. The cover materials are prepared by first forming a polyurethane prepolymer which undergoes two curing steps. In the first step, the prepolymer is chemically-cured by reacting it with hydroxyl curing agents, amine curing agents, or mixtures thereof. In the second step, the composition is moisture-cured. The cured material may be used to make a golf ball cover having improved durability, cut/tear resistance, and impact strength.
摘要:
Multi-piece, solid golf balls having a cover material made from a polyurea or polyurea/urethane hybrid composition are provided. The cover materials are prepared by first forming a polyurea prepolymer which undergoes two curing steps. In the first step, the prepolymer is chemically-cured by reacting it with hydroxyl curing agents, amine curing agents, or mixtures thereof. In the second step, the composition is moisture-cured. The cured material may be used to make a golf ball cover having improved durability, cut/tear resistance, and impact strength.
摘要:
Methods for making polyurea polymer compositions are provided. The methods involve preparing an amine-terminated first prepolymer by reacting isocyanate compound A with a stoichiometric excess of polyamine. The first prepolymer is reacted with a stoichiometric excess of isocyanate compound B to form an isocyanate-terminated second prepolymer. The second prepolymer is reacted with a chain extender. The polymer compositions can be used in different products and are particularly suitable for making golf balls. For example, the polymer compositions can be used to make golf ball covers.
摘要:
Methods for making polyurea polymer compositions are provided. The methods involve preparing an amine-terminated first prepolymer by reacting isocyanate compound A with a stoichiometric excess of polyamine. The first prepolymer is reacted with a stoichiometric excess of isocyanate compound B to form an isocyanate-terminated second prepolymer. The second prepolymer is reacted with a chain extender. The polymer compositions can be used in different products and are particularly suitable for making golf balls. For example, the polymer compositions can be used to make golf ball covers.
摘要:
Compositions for golf balls that include polyurethane and/or polyurea linkages and that are crosslinked in the soft segments of the polymer backbone to improve the crosslink density and effect a hardness gradient throughout the molded article.
摘要:
Golf balls having a hard outer skin produced from a material that includes crosslinks in both the hard and soft segments of the polymer backbone that improve the crosslink density. Compositions formed from polyurethane and/or polyurea prepolymers that are first cured with a curative blend including an isocyanate-reactive component to crosslink the hard segment and then exposed to a free radical initiator and radiation to crosslink the soft segments are used in an outer layer of a golf ball, a unitary golf ball, or other golf ball constructions.
摘要:
A golf ball comprising a core and at least one layer disposed about the core, wherein at least one of the core and the layer comprises a thermoplastic or thermoset composition comprising a reaction product of a polyurethane or polyurea prepolymer comprising at least one isocyanate and a curative comprising a blend of at least one aliphatic diamine and at least one polyaspartic ester formed from reactants comprising at least one aliphatic primary polyamine and at least one maleic or fumaric diester, and wherein the thermoplastic or thermoset composition comprises a gel time of about 90 seconds or greater. Also, a golf ball comprising a core and at least one layer disposed about the core wherein at least one of the core and the layer comprises a thermoplastic or thermoset composition T comprising a reaction product of a polyurethane or polyurea prepolymer P comprising at least one isocyanate and a curative C comprising a blend of at least one aliphatic diamine D and at least one polyaspartic ester formed from reactants comprising at least one aliphatic primary polyamine and at least one maleic or fumaric diester, wherein the thermoplastic or thermoset composition T has a gel time X such that X>1.25Y, and wherein Y is the gel time of a thermoplastic or thermoset composition T′ comprising a reaction product of the polyurethane or polyurea prepolymer P and a curative C′ comprising a blend of aliphatic diamine D and a polyaspartic ester consisting of N,N′-diethylmaleate-2-methyl-pentamethylene diamine.
摘要:
Compositions for golf balls that include polyurethane and/or polyurea linkages and that are crosslinked in the soft segments of the polymer backbone to improve the crosslink density and effect a hardness gradient throughout the molded article.
摘要:
The invention relates to golf ball formulations formed from blends of linear and branched polybutadienes catalyzed with neodymium that have improved properties and processing characteristics. Golf ball components may be formed from the blends to provide high coefficient of restitution.
摘要:
A golf ball comprising a single layer core and a cover layer disposed about the single layer core, the single layer core being formed from a substantially homogenous formulation and comprising a geometric center and an outer surface, the single layer core further comprising an inner core region disposed about the geometric center, an outer core region adjacent the outer surface, and an intermediate core region disposed between the inner and outer core regions and extending radially from about 8 mm to about 18 mm from the geometric center. The single layer core has first, second and third hardnesses disposed within the inner core region, outer core region, intermediate core region, respectively, wherein the third hardness is greater than the first hardness and the second hardness, and a hardness of the outer surface is substantially the same as or lower than a hardness of the geometric center.