The present disclosure provides a resin composition containing a bio-polyethylene resin (A), an ethylene-vinyl alcohol copolymer (B), and an alkali metal salt (C), wherein the content of the alkali metal salt (C) is 10 ppm to 1500 ppm, in terms of metal, with respect to the weight of the ethylene-vinyl alcohol copolymer (B). With this resin composition, gel formation and a reduction in transparency during molding are suppressed, and a molded product having an excellent appearance can thus be obtained.

The present disclosure provides a resin composition containing a bio-polyethylene resin (A), an ethylene-vinyl alcohol copolymer (B), and an alkali metal salt (C), wherein the content of the alkali metal salt (C) is 10 ppm to 1500 ppm, in terms of metal, with respect to the weight of the ethylene-vinyl alcohol copolymer (B). With this resin composition, gel formation and a reduction in transparency during molding are suppressed, and a molded product having an excellent appearance can thus be obtained.

An impact-resistant polystyrene resin includes a continuous phase and a plurality of particles dispersed in the continuous phase. The average particle size of the particles is about 0.1 to 4.0 .Math.m, and the average distance between the particles is about 0.3 to 5.0 .Math.m. The impact-resistant polystyrene resin is made from a polystyrene composition including a polystyrene plastic, a styrene block copolymer, a processing aid, and an antioxidant.

An impact-resistant polystyrene resin includes a continuous phase and a plurality of particles dispersed in the continuous phase. The average particle size of the particles is about 0.1 to 4.0 .Math.m, and the average distance between the particles is about 0.3 to 5.0 .Math.m. The impact-resistant polystyrene resin is made from a polystyrene composition including a polystyrene plastic, a styrene block copolymer, a processing aid, and an antioxidant.

An impact-resistant polystyrene resin includes a continuous phase and a plurality of particles dispersed in the continuous phase. The average particle size of the particles is about 0.1 to 4.0 .Math.m, and the average distance between the particles is about 0.3 to 5.0 .Math.m. The impact-resistant polystyrene resin is made from a polystyrene composition including a polystyrene plastic, a styrene block copolymer, a processing aid, and an antioxidant.

An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) two or more α,β-unsaturated carboxylic acids having 3 to 14 carbon atoms and having no substituent group at a carbon atom bonding to the carboxy group, and/or a metal salt thereof, and (c) a crosslinking initiator.

An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) two or more α,β-unsaturated carboxylic acids having 3 to 14 carbon atoms and having no substituent group at a carbon atom bonding to the carboxy group, and/or a metal salt thereof, and (c) a crosslinking initiator.

A resin composition useful for additive manufacturing is provided, which resin composition may exhibit improved shelf life through inhibition of crystallization. Such resin composition may include a crystallization inhibitor as taught herein, and/or a prepolymer produced by reaction of an isocyanate with multiple isomers and comprising a lower percentage of the structurally symmetric isomer. Methods of forming a three-dimensional object using such resin composition are also provided.

A resin composition useful for additive manufacturing is provided, which resin composition may exhibit improved shelf life through inhibition of crystallization. Such resin composition may include a crystallization inhibitor as taught herein, and/or a prepolymer produced by reaction of an isocyanate with multiple isomers and comprising a lower percentage of the structurally symmetric isomer. Methods of forming a three-dimensional object using such resin composition are also provided.

A method for forming a golf ball with a graphene core disclosed herein. The method includes mixing a graphene masterbatch material with a polybutadiene material to form a core mixture, wherein the graphene masterbatch material comprises graphene in an amount from 0.1 to 80.0 weight percent of the graphene masterbatch material mixed with a carrier polymer in an amount from 99.9 to 20 weight percent of the graphene masterbatch material.