Abstract: A rubber composition suitable for producing hollow cores of pressureless tennis balls and superior in rebound properties and feeling of striking balls by racket, which contains, as a rubber component, 30 to 100% by weight of a polybutadiene rubber having a content of cis-1,4 bond of at least 97% by weight and a Z-average molecular weight of 5.times.10.sup.6 to 2.times.10.sup.7 and 70 to 0% by weight of other diene rubbers.

Abstract: Disclosed is a solid golf ball containing at least one rubber portion formed from a rubber composition comprising a base rubber, a co-crosslinking agent and an organic peroxide; an improvement being present in that the base rubber is a mixture of(A) a solid polybutadiene rubber containing cis-1,4 bonds in an amount of at least 40%, and(B) either a liquid polybutadiene rubber or a liquid isoprene-butadiene copolymer rubber, or both.

Abstract: A pressureless tennis ball which has excellent rebound properties and produces a satisfactory feeling of striking retained over a long period of time, the tennis ball having a hollow spherical core made from a rubber composition containing a rubber and 5 to 60 parts by weight of polyethylene per 100 parts by weight of the rubber.

Abstract: An novel golf ball is disclosed having an improved cover composition comprising a blend of a first copolymer of an olefin and a sodium salt of an unsaturated carboxylic acid, a second copolymer of an olefin and a zinc salt of an unsaturated carboxylic acid, and a third copolymer of an olefin and a lithium salt of an unsaturated carboxylic acid. The novel golf balls having the improved cover compositions exhibit improved playing properties.

Abstract: The present invention relates to improved cover compositions for golf ball construction. The cover compositions comprise a blend of polar modified thermoplastic elastomers and ionomer resins.In addition, the present invention is directed to golf balls produced utilizing the improved cover compositions. The golf balls exhibit properties of enhanced playability without sacrificing distance and/or durability.

Abstract: A carrier composition comprised of a semiconductive ferrite core with a coating thereover comprised of a mixture of first and second polymers that are not in close proximity thereto in the triboelectric series.

Abstract: The invention provides compositions useful in the manufacture of one-, two- and three-piece golfballs comprising blends of a copolyetherester or copolyetheramide, an expoxy-containing compound, and an acid-containing ethylene copolymer ionomer.

Abstract: A rubber composition comprising at least one natural and/or synthetic rubber component(s), fine inorganic fibers subjected to a surface treatment with a surface treating agent and a non-sulfur type vulcanizing agent and a golf ball comprising the composition which exhibits excellent durability, bounce impact elasticity and excellent feeling upon hitting.

Abstract: Solid golf balls comprise a vulcanizable rubber and a reinforcing filler comprising an essentially anhydrous metal salt of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid. Golf balls containing such reinforcing fillers have improved physical properties over rubber compounds containing conventional metal carboxylic acid salts. Additionally, the rubber compounds have improved processability and shorter curing time.

Abstract: A rubber composition comprising at least one natural and/or synthetic rubber component(s), fine inorganic fibers subjected to a surface treatment with a surface treating agent and a non-sulfur type vulcanizing agent and a golf ball comprising the composition which exhibits excellent durability, bounce impact elasticity and excellent feeling upon hitting.

Abstract: The present invention is a composition for making a solid one-piece golf ball and the core of a two-piece or multi-layer golf ball with a butadiene base crosslinked by a methacrylic acid zinc salt. The resulting product is a golf ball with outstanding performance which possesses both resilience and durability and which can be reproduced accurately and economically. This type of golf ball is suitable for play by tournament caliber golfers.

Abstract: The present invention is directed to improved cover compositions for golf ball construction and the resulting golf balls produced utilizing the improved cover compositions. The novel golf ball cover compositions of the invention comprise a blend of hard ionomeric resins, preferably acrylic acid based ionomers, and recently developed acrylic acid based soft ionomers. When the cover compositions of the invention are utilized to manufacture golf balls, the golf balls produced thereby, exhibit properties of improved distance without sacrificing playability and/or durability when compared to known hard-soft ionomer blends.

Abstract: Golf balls of improved coefficient of restitution provided by polymerizing an elastomer or admixture of elastomers in the presence of at least one metallic salt of an unsaturated carboxylic acid and t-amyl peroxide or blends thereof as a free radical initiator.

Abstract: One-piece and multi-layered golf balls are improved in flying performance by forming the one-piece ball entirely or multi-layered golf ball core from a rubber composition comprising a base rubber and a co-crosslinking agent in the form of a premix of an unsaturated fatty acid metal salt and a liquid polymer.

Abstract: Solid golf balls are produced by the method comprising the steps of preparing a polymer cement in a suitable organic solvent, forming a suspension of the metal salt of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid in a suitable aliphatic hydrocarbon solvent miscible with the organic solvent, mixing the polymer cement and the suspension together, removing the solvents to provide the metal salt uniformly dispersed within the polymer, and thereafter manufacturing a solid golf ball therefrom. Solid golf balls comprise a vulcanizable rubber and from about 5 to 100 parts by weight of a reinforcing filler comprising a metal salt of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, per 100 parts of the vulcanizable rubber. When the metal salts are incorporated via solution masterbatching, the resulting golf balls have improved physical properties.

Abstract: The present invention provides a solid golf ball containing the ultra-high molecular weight polybutadiene which is formulated therein in a solution form. The golf ball has very improved impact resilience and durability. The present invention provides a solid golf ball having at least a resilient portion therein formed from a rubber composition which comprises a base rubber, a crosslinking agent and a co-crosslinking agent, wherein said base rubber comprises a solid polybutadiene prepared by mixing the following components in solution form(a) 5 to 50% by weight of an ultra-high molecular weight polybutadiene rubber which has a cis-1,4-bond of at least 80% and a number average molecular weight of 40.times.10.sup.4 or more, and(b) 95 to 50% by weight of a polybutadiene rubber which has a cis-1,4-bond of at least 80% and a number average molecular weight of less than 40.times.10.sup.4.

Abstract: In a thread-wound golf ball comprising a thread-wound core and a cover, the cover is formed of a vulcanized rubber composition comprising a base rubber containing at least 30% by weight of transpolyisoprene and has a vulcanizing sulfur content ratio between radially outer and inner half regions of from 1/2 to 4/1. Sufficient vulcanizing sulfur available throughout the cover renders the cover to be resistant to cut and shear so that the ball becomes durable.

Abstract: A white painted balata covered golf ball has two painted layers on top of the outer surface of the cover of the golf ball. The painted layer is made from 100 parts by weight of a white base urethane paint resin with 0.1 parts by weight of a blue agent and 0.04 parts by weight of a violet agent. A top clear coat can be applied on top of the paint layers.

Abstract: A covering composition comprising an ionomer resin and a low-molecular weight polyethylene wax has improved impact resistance. A golf ball having a core enclosed in a cover thereof is fully durable and exhibits satisfactory flying performance.

Abstract: A one-piece golf ball or a core of a multi-layered golf ball is formed from a rubber composition containing a base rubber component in the form of a modified rubber which is prepared by introducing an unsaturated carboxylate group into a polybutadiene rubber. The ball is satisfactorily durable and shows good flying performance.

Abstract: The golf ball cover is made from about 90 to about 50 parts by weight of a lithium ionomer resin and about 10 to about 40 parts by weight sodium ionomer resin. The cover has excellent durability.

Abstract: A regulation golf ball is provided with a solid coating of reflective glass beads. The ball is used for night play with the use of a light source, which is aimed in the direction of flight of the ball, and the light source is used to find the ball.

Abstract: The present invention relates to improved cover compositions for golf ball construction. The cover compositions comprise a blend of (1) modified thermoplastic rubber elastomers, wherein the thermoplastic rubber elastomers are modified with a polar group, such as maleic anhydride, and (2) ionomer resins. In addition, the present invention is directed to golf balls produced utilizing the improved cover compositions. The golf balls exhibit properties of enhanced playability without sacrificing distance and/or durability.

Abstract: The present invention provides a golf ball covering with a special ionomer resin mixture having improved properties. The special ionomer resin mixture has a melt index of 0.5 to 3.0 and a Shore D hardness of at least 65, and is prepared by mixing three ionomer resins in specific amount ratios.

Abstract: An improved golf ball cover is disclosed. The cover has balata replaced by cis 1,4 polybutadiene in an amount up to 30 parts without producing a deleterious effect on the cover yet maintaining the good "clock" and "feel" of a balata covered golf ball and increasing the toughness of the ball cover.

Abstract: A one-piece golf ball exhibiting an increased flying distance and a high durability suitable for golf driving ranges, i.e. a solid golf ball having a central hardness (JIS-C hardness) of 60 to 75, a hardness at a position 10 mm from the center of 72 to 80 and a surface hardness of 70 to 85, whereby the central hardness is minimum, and the difference between the maximum hardness and the minimum hardness is 15 or less, said golf ball being obtained by vulcanizing and molding a rubber composition comprising(a) 100 parts by weight of polybutadiene rubber, mainly comprising high-cis-polybutadiene rubber containing the cis-1,4-structure in a quantity of at least 96% and having a Mooney viscosity of 48 to 85 synthesized by the use of a nickel-containing catalyst;(b) 0.1 to 2.0 parts by weight of 2,5-di-t-butylhydroquinone as a vulcanization stabilizer;(c) 10 to 50 parts by weight of unsaturated carboxylic acids and/or salts thereof; and(d) 0.5 to 5 parts by weight of a free radical initiator.

Abstract: The solid golf ball is made from a polybutadiene admixture of cis-1,4 polybutadiene and 1,2 polybutadiene; a metal salt of an unsaturated carboxylic acid; an inorganic filler; and a free radical initiator. The admixture has about 99.5% to about 95% by weight of cis-1,4 polybutadiene and about 0.5% to about 5% by weight of 1,2 polybutadiene. The cis-1,4 polybutadiene is made from about 80% to about 100% by weight of cis-1,4 polybutadiene with a cis-1,4 content of 95% and about 0% to about 20% by weight of a cis-1,4 polybutadiene with a cis-1,4 content of about 98%.

Abstract: A rubber composition comprising at least one natural and/or synthetic rubber component(s), fine inorganic fibers subjected to a surface treatment with a surface treating agent and a non-sulfur type vulcanizing agent and a golf ball comprising the composition which exhibits excellent durability, bounce impact elasticity and excellent feeling upon hitting.

Abstract: The golf ball product is made from two polybutadienes, each having a Mooney viscosity of below about 50 and a cis-1,4 content of greater than about 40%. One polybutadiene is nickel- or cobalt-catalyzed, while the other is lanthanide-catalyzed. The golf ball product includes a mix of the two polybutadienes, a metal salt of an unsaturated carboxylic acid and a free radical initiator.

Abstract: Disclosed is a carrier and developer composition, and a process for the preparation of carrier particles with substantially stable conductivity parameters which comprises (1) providing carrier cores and a polymer mixture; (2) dry mixing the cores and the polymer mixture; (3) heating the carrier core particles and polymer mixture, whereby the polymer mixture melts and fuses to the carrier core particles; and (4) thereafter cooling the resulting coated carrier particles.

Abstract: The disclosure describes carrier particles for use in a two-component dry-type developer, consisting of core particles which are coated with a silicone resin hardened by an organic tin catalyst.

Abstract: An improved golf ball comprising a core and a cover therefor, said cover comprises singularly or blends of a zinc neutralized ethylene-acrylic acid copolymer and a sodium neutralized ethylene-acrylic acid copolymer, or a blend of two or more zinc-neutralized ethylene-acrylic acid copolymers and a sodium-neutralized ethylene acrylic acid copolymer.

Abstract: The subject invention relates to golf ball technology, and more particularly, golf ball cover technology. The invention is concerned with a particular mixture of ionic resins as a golf ball cover composition.Ionomers have been widely used as golf ball cover materials for the past 15 years. While these ionomers are very durable, they have a deficiency as a golf ball cover material in that they tend to be hard. This invention is concerned with a mixture of a hard ionomer with a soft ionomer in order to produce a golf ball cover composition wherein the cover is softer than the prior art ionomer covers.A golf ball covered in accordance with this invention is durable and a skilled golfer can impart back spin to the ball in play.

Abstract: Golf balls exhibiting an improved coefficient of restitution are obtained by the inclusion of dialkyl tin difatty acids in the core formulation.

Abstract: Golf balls exhibiting superior durability and improved coefficient of restitution is provided by the inclusion of a dispersing agent in the core formulation.

Abstract: An improved golf ball cover is disclosed. The cover has balata replaced by polyoctenylene rubber in an amount up to 40 parts without producing a deleterious effect on the cover yet maintaining the good "click" and "feel" of a balata covered golf ball and increasing the toughness of the ball cover.

Abstract: A composition for making golf ball products is disclosed. Polybutadiene is crosslinked by zinc diacrylate with the use of a free radical initiator, such as a peroxide. The amount of free radical initiator used is between 0.2 parts and 0.8 parts per 100 parts polybutadiene. The amount of zinc diacrylate and free radical initiator are controlled and the curing conditions adjusted so that the golf ball product has a swell index of at least about 0.6 and a PGA compression of about 50-110.

Abstract: A solid golf ball is made using zinc diacrylate to crosslink polybutadiene. A small amount of zinc dimethacrylate is added and results in a golf ball of higher initial velocity. The amount of zinc dimethacrylate is between 0.1% to 2.0% by weight of the combined total of zinc diacrylate and zinc dimethacrylate. The golf ball product is suitably a one piece golf ball or the core of a two piece golf ball.

Abstract: Solid golf balls are formed from a molding composition comprising (1) a polybutadiene blend of (A) a polybutadiene synthesized using a nickel and/or cobalt base catalyst and having a Mooney viscosity of 70 to 100 with (B) less than 50 parts by weight of a polybutadiene synthesized using a lanthanide rare earth element base catalyst and having a Mooney viscosity of 30 to 90 or (C) 20 to 80 parts by weight of a polybutadiene synthesized using a nickel and/or cobalt base catalyst and having a Mooney viscosity of 20 to 50, the polybutadienes containing at least 40% of cis-1,4 bond, (2) a crosslinking agent such as acrylic and methacrylic acid, (3) an inorganic filler, and (4) an organic peroxide.

Abstract: The disclosure relates to golf balls and more particularly, to golf ball cover compositions. The disclosure is concerned primarily with composition and method for the enhancement of the color of a golf ball cover by the use of an optical brightener in conjunction with a pigmented golf ball cover composition. This invention is concerned with the enhancement of the color of white golf ball covers. When used in conjunction with a white pigmentation system, the optical brighteners in question enhance the color in the blue spectrum range in order to give the cover a whiter appearance.

Abstract: A finely powdered polymer latex in the rod-like form having a major axis of from 0.1 to 100 microns and a minor axis of below 1/3 times the major axis. When the particles are dispersed in water at a concentration of 15 wt %, the thixotropy index, .eta.3/.eta.30 is not less than 1.5.The polymer powder of the above size and configuration is useful in various fields including paint binders, diagnostic means and cosmetics.The polymer latex is prepared by solubilizing a polymerizable monomer in rod-shaped micelles, and polymerizing the monomer while keeping the rod-shaped micelle structure.

Abstract: A resin composition comprising(I) a granular or powdery resin which is a condensation product of a phenol, an aldehyde and optionally a nitrogen-containing compound having at least two active hydrogens and is characterized by (A) containing spherical primary particles and their secondary agglomerated particles each having a particle diameter of 0.1 to 150 microns, (B) having such a size that at least 50% by weight thereof can pass through a 100 Tyler mesh sieve, and (C) having a free phenol content, determined by liquid chromatography, of not more than 500 ppm, and(II) at least one member selected from the group consisting of (1) a rubbery elastic material, (2) a thermoplastic resin and (3) a curable resin other than said granular or powdery resin (I) and/or a filler material other than said granular or powdery resin (I).

Abstract: An object of the present invention is to obtain a tennis ball and a core for tennis ball which keeps high values within the ITF standard and besides has excellent durability.That is, the present invention provides a core for tennis ball obtained by vulcanizing a rubber composition containing, in its whole rubber component, 5 to 40 weight % of a 1,2-bond containing polybutadiene and 60 to 95 weight % of a natural rubber and/or high cis-polybutadiene containing not less than 90% of a cis 1,4-bond, and tennis balls obtained therefrom.

Abstract: Pressureless tennis balls which comply with regulations of the International Tennis Federation and produce a satisfactory feel of striking retained over an extended period of play, and which comprises a hollow spherical core made from a rubber composition the rubber component of which contains 5 to 50% by weight of a particular modified polybutadiene containing 5 to 30% by weight of syndiotactic-1,2-polybutadiene and at least 40% by weight of cis-1,4-polybutadiene.

Abstract: A cover composition for golf balls having an improved impact resistance which comprises an ionomer resin and 1 to 15 parts by weight of a linear low density polyethylene per 100 parts by weight of the ionomer resin.

Abstract: A zinc acrylate powder coated with a higher fatty acid has a good dispersibility into a rubber, and is used as a co-crosslinking agent in rubber compositions for one piece solid golf balls or for cores of covered solid golf balls. The compositions containing the coated zinc acrylate have a good roll workability and provide solid golf balls having an improved impact resilience, a proper hardness and good sound and feeling of striking.

Abstract: The present invention provides solid golf balls having excellent rebound performance, durability and flight carry characteristics produced from a rubber composition containing one or more agents for regulating the molecular weight of grafted chain selected from the group consisting of 2-(4-morpholinyldithio) benzothiazole, 4,4'-dithio-bis-dimorpholine, dipentamethylenethiuram tetrasulfide and derivatives thereof.

Abstract: A process of making a superior solid golf ball is disclosed. Two free radical initiators having different reactivities are used. A surprising and unexpected increase in initial velocity is obtained.

Abstract: A golf ball having an improved low temperature impact resistance, which comprises a core and a cover made of a cover composition containing an ionic copolymer having at least two different metal ions in one molecule. The cover composition is prepared by kneading a sodium ion type ionic copolymer having free carboxyl groups and a metal oxide such as magnesium or zinc oxide at high temperatures, whereby the metal oxide is reacted with the ionic copolymer to incorporate the metal ion such as magnesium or zinc ion into the ionic copolymer.

Abstract: A liquid-filled polyurethane elastomer gel is fabricated from water, organic glycol and a polyisocyanate prepolymer. The prepolymer is formed from organic diisocyanate and organic diol or triol having a molecular weight of 3,000 to 10,000 and containing at least 40 percent by weight ethylene oxide adducts. The prepolymer is mixed with 3 to 20 times its weight of aqueous reactant including 25 to 65 percent by weight water and 75 to 35 percent by weight organic polyol. The resulting stable gel contains aqueous solutions of emulsions dispersed therein as small droplets comprising 75 to 95 percent of the weight of the resulting article. The liquid-filled polyurethane elastomer gel can be cast into shapes or can be formed into globs of random shape.