A carboxylic acid-modified nitrile-based copolymer latex includes a carboxylic acid-modified nitrile-based copolymer including: 65.5 wt % to 82.5 wt % of a conjugated diene-based monomer-derived unit, 15 wt % to 30 wt % of an ethylenic unsaturated nitrile-based monomer-derived unit, and 2.5 wt % to 4.5 wt % of an ethylenic unsaturated acid monomer-derived unit, wherein the carboxylic acid-modified nitrile-based copolymer latex satisfies General Formula 1:

1.0 mm.sup.2/s≤CV.sub.0≤3.0 mm.sup.2/s  [General Formula 1]

wherein CV.sub.0 represents a capillary viscosity of the carboxylic acid-modified nitrile-based copolymer latex which is measured in a swollen state in a methyl ethyl ketone solvent.

A latex formulation comprising elastomer, thermoplastic, accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant, filler, pH adjuster and dispersing medium, wherein the latex formulation has a total solid content ranging between 5% by weight to 40% by weight. A method of preparing a latex formulation to manufacture a glove containing both thermoplastic and elastomer, wherein the method comprises the steps of blending elastomer with thermoplastic to produce a dispersion and stirring the dispersion, adding while stirring accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant and filler one after another with no particular order and followed by pH adjuster into the dispersion to produce latex formulation and stirring continuously and allowing to mature, wherein total solid content is adjusted to between 5% by weight to 40% by weight by way of addition of dispersing medium and wherein pH range of the latex formulation is adjusted to between 9 to 11.

A latex formulation comprising elastomer, thermoplastic, accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant, filler, pH adjuster and dispersing medium, wherein the latex formulation has a total solid content ranging between 5% by weight to 40% by weight. A method of preparing a latex formulation to manufacture a glove containing both thermoplastic and elastomer, wherein the method comprises the steps of blending elastomer with thermoplastic to produce a dispersion and stirring the dispersion, adding while stirring accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant and filler one after another with no particular order and followed by pH adjuster into the dispersion to produce latex formulation and stirring continuously and allowing to mature, wherein total solid content is adjusted to between 5% by weight to 40% by weight by way of addition of dispersing medium and wherein pH range of the latex formulation is adjusted to between 9 to 11.

A high performing low viscosity tire sealant includes about 15% to about 75% by weight of a biobased aliphatic diol, about 5% to about 50% by weight natural rubber latex, and about 2% to about 50% by weight synthetic rubber latex. The tire sealant exhibits excellent performance at temperatures of −40 degrees Celsius and lower.

A high performing low viscosity tire sealant includes about 15% to about 75% by weight of a biobased aliphatic diol, about 5% to about 50% by weight natural rubber latex, and about 2% to about 50% by weight synthetic rubber latex. The tire sealant exhibits excellent performance at temperatures of −40 degrees Celsius and lower.

The present invention relates to a method of preparing reduced graphene oxide, incorporation of the reduced graphene oxide into polyisoprene latex to provide a polyisoprene latex graphene composite and elastomeric articles prepared using the polyisoprene latex-graphene composite. In particular, the reduction of graphene oxide is accomplished without the use of strong reducing agents and organic solvents and incorporation of the reduced graphene oxide into polyisoprene latex is accomplished using room temperature latex mixing method or hot maturation. The resultant composite exhibits good colloid stability and polyisoprene latex films produced from the composite exhibit good mechanical properties with improved ageing resistance.

The present invention relates to a method of preparing reduced graphene oxide, incorporation of the reduced graphene oxide into polyisoprene latex to provide a polyisoprene latex graphene composite and elastomeric articles prepared using the polyisoprene latex-graphene composite. In particular, the reduction of graphene oxide is accomplished without the use of strong reducing agents and organic solvents and incorporation of the reduced graphene oxide into polyisoprene latex is accomplished using room temperature latex mixing method or hot maturation. The resultant composite exhibits good colloid stability and polyisoprene latex films produced from the composite exhibit good mechanical properties with improved ageing resistance.

A method of recovering nitrile rubber from water-containing crumbs includes crumb-like nitrile rubber using an extruder in which a screw is disposed inside a barrel so as to be capable of being rotationally driven. The barrel is formed with at least a washing zone. The method includes supplying washing water to the washing zone at a water pressure of 0.2 MPa or higher while mixing the crumb-like nitrile rubber and the supplied washing water in the washing zone, thereby washing the crumb-like nitrile rubber.

A method of recovering nitrile rubber from water-containing crumbs includes crumb-like nitrile rubber using an extruder in which a screw is disposed inside a barrel so as to be capable of being rotationally driven. The barrel is formed with at least a washing zone. The method includes supplying washing water to the washing zone at a water pressure of 0.2 MPa or higher while mixing the crumb-like nitrile rubber and the supplied washing water in the washing zone, thereby washing the crumb-like nitrile rubber.

A conjugated diene-based copolymer composition, a method of preparing the same, and a rubber composition including the same are provided. The conjugated diene-based copolymer composition includes a first conjugated diene-based copolymer and a second conjugated diene-based copolymer each including a repeating unit derived from an aromatic vinyl monomer, a repeating unit derived from a conjugated diene-based monomer, and a repeating unit derived from a hydroxyalkyl (meth)acrylate monomer. The first conjugated diene-based copolymer includes 0.01 wt % to 1 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer, and the second conjugated diene-based copolymer includes 4.5 wt % to 6.5 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer.