摘要:
Golf balls containing a core comprising a blend of: a) about 1 to about 49 weight percent of a polybutadiene rubber having a relatively high Mooney viscosity, and b) about 51 to about 99 weight percent of a polyalkenamer rubber having a relatively low Mooney viscosity are provided. Single or multi-layered cores may be prepared. In addition, the golf ball includes a cover that may be single or multi-layered. The cover is preferably made of polyurethanes, polyureas, or blends thereof. The polyalkenamer/polybutadiene rubber composition helps provide the ball with high resiliency along with a soft feel.
摘要:
Multi-piece golf balls containing a core of at least one layer and cover of at least one layer are provided. At least one component is formed from a rubber composition comprising: i) about 10 to about 65 weight percent of a cycloalkene rubber having a trans-content of about 55% or greater and a melting point of 30° C. or greater; ii) about 30 to about 80 weight percent of an ionomeric resin; and 3) about 5 to about 40 weight percent of a polyamide. The rubber composition may further include other thermoplastic and thermosetting materials such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. The rubber composition helps improve resiliency, durability, scuff-resistance, and feel of the ball.
摘要:
Golf balls having a core comprising a polyalkenamer rubber composition are provided. The rubber composition may further include other rubbers such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. The rubber composition helps improve resiliency of the core and provides the ball with a comfortable and soft feel. In one version, a solid, single core having an outer surface and geometric center is provided, wherein the outer surface has a hardness greater than the hardness of the geometric center to define a positive hardness gradient of at least 10 Shore C. In a second version, a dual-core having an inner core and surrounding outer core layer is provided. The inner core has a positive hardness gradient, while the outer core has a zero; negative; or positive hardness gradient.
摘要:
Golf balls containing a core having at least one layer and cover having at least one layer are provided. A thermoplastic ionomeric composition is used to form at least one layer of the ball. The composition is prepared by providing a masterbatch comprising cycloalkene (polyalkenamer) rubber and neutralizing agent and mixing the masterbatch with ethylene acid copolymer. The acid groups are neutralized to 30 weight percent or greater, preferably 50% or greater, and more preferably 70% or greater. The resulting ball has high resiliency and rebounding properties along with a soft feel.
摘要:
Golf balls containing a core having at least one layer and cover having at least one layer are provided. A thermoplastic ionomeric composition is used to form at least one layer of the ball. The composition is prepared by providing a masterbatch comprising cycloalkene (polyalkenamer) rubber and neutralizing agent and mixing the masterbatch with ethylene acid copolymer. The acid groups are neutralized to 30 weight percent or greater, preferably 50% or greater, and more preferably 70% or greater. The resulting ball has high resiliency and rebounding properties along with a soft feel.
摘要:
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 rubber composition helps improve resiliency of the core and provides the ball with a comfortable and soft feel.
摘要:
Golf balls having cores with negative hardness gradients are provided. The cores are made of polyalkenamer rubber compositions that may further include other rubbers such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. In one version, a solid, single core having an outer surface and center is provided, wherein the outer surface has a hardness substantially the same or lower than the hardness of the center to define a zero or negative hardness gradient. Dual-cores having inner and outer cores can be made, wherein the inner core has a negative hardness gradient and the outer core has a positive or negative hardness gradient. The rubber composition helps improve resiliency of the core and provides the ball with a comfortable and soft feel.
摘要:
Golf balls containing a core comprising a blend of: a) about 1 to about 49 weight percent of a polybutadiene rubber having a relatively high Mooney viscosity, and b) about 51 to about 99 weight percent of a polyalkenamer rubber having a relatively low Mooney viscosity are provided. Single or multi-layered cores may be prepared. In addition, the golf ball includes a cover that may be single or multi-layered. The cover is preferably made of polyurethanes, polyureas, or blends thereof. The polyalkenamer/polybutadiene rubber composition helps provide the ball with high resiliency along with a soft feel.
摘要:
Golf balls golf balls containing a core having at least two layers made from a polyalkenamer rubber composition are provided. At least one layer is made from a relatively low modulus polyalkenamer rubber composition and at least one layer is made from a relatively high modulus polyalkenamer rubber composition. The rubber composition may further include other rubbers such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. The rubber composition helps improve resiliency of the core. In one version, a dual-core having an inner core and surrounding outer core layer is provided. In another version, the golf ball contains a three-piece core having an intermediate core layer made of polybutadiene rubber.
摘要:
Golf balls having cores with negative hardness gradients are provided. The cores are made of polyalkenamer rubber compositions that may further include other rubbers such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. In one version, a solid, single core having an outer surface and center is provided, wherein the outer surface has a hardness substantially the same or lower than the hardness of the center to define a zero or negative hardness gradient. Dual-cores having inner and outer cores can be made, wherein the inner core has a negative hardness gradient and the outer core has a positive or negative hardness gradient. The rubber composition helps improve resiliency of the core and provides the ball with a comfortable and soft feel.