Provided is a carboxylic acid-modified nitrile-based copolymer latex, and more particularly, provided are a carboxylic acid-modified nitrile-based copolymer latex which includes a carboxylic acid-modified nitrile-based copolymer including a monomer-derived repeating unit; and a repeating unit derived from a monomer represented by Chemical Formula 1 below, the monomer-derived repeating unit including a conjugated diene-based monomer-derived repeating unit, an ethylenically unsaturated nitrile-based monomer-derived repeating unit, and an ethylenically unsaturated acid monomer-derived repeating unit (see description of the present invention), a method for preparing a carboxylic acid-modified nitrile-based copolymer latex, a latex composition for dip-forming including the copolymer latex, and an article formed by the composition.

Provided is a dip molding emulsion including, at least: an elastomer that contains a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit, and a butadiene-derived structural unit in a polymer main chain; an epoxy crosslinking agent; water; and a pH modifier, in which dip molding composition the elastomer contains the (meth)acrylonitrile-derived structural unit in an amount of 20% by weight to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1% by weight to 10% by weight, and the butadiene-derived structural unit in an amount of 50% by weight to 75% by weight, and the epoxy crosslinking agent includes an epoxy crosslinking agent containing an epoxy compound having three or more epoxy groups in one molecule and has a dissolution rate in water of 10% to 70% as determined by a specific measurement method.

Provided is a dip molding emulsion including, at least: an elastomer that contains a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit, and a butadiene-derived structural unit in a polymer main chain; an epoxy crosslinking agent; water; and a pH modifier, in which dip molding composition the elastomer contains the (meth)acrylonitrile-derived structural unit in an amount of 20% by weight to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1% by weight to 10% by weight, and the butadiene-derived structural unit in an amount of 50% by weight to 75% by weight, and the epoxy crosslinking agent includes an epoxy crosslinking agent containing an epoxy compound having three or more epoxy groups in one molecule and has a dissolution rate in water of 10% to 70% as determined by a specific measurement method.

A latex composition for dip molding including a latex of a conjugated diene polymer (A) having a methyl ethyl ketone insolubles content of 50% by weight or less, and a latex of a polymer (B) having a methyl ethyl ketone insolubles content of 55% by weight or more.

A latex composition for dip molding including a latex of a conjugated diene polymer (A) having a methyl ethyl ketone insolubles content of 50% by weight or less, and a latex of a polymer (B) having a methyl ethyl ketone insolubles content of 55% by weight or more.

The present invention is directed to a coating composition or paint comprising a multistage latex with at least first and second stages, wherein the composition or paint is substantially free of volatile organic compounds (VOC) and capable of film formation even in the absence of coalescent agents. The base paint formulation is capable of being tinted at a point-of-sale (i.e. in-store) using a colorant composition of a type and quantity required to produce a paint of desired color and finish. The paints, show improved block resistance, scrub resistance and tack resistance. Rheological techniques as described herein may be used to determine tack resistance, print resistance, and other performance characteristics.

The present invention is directed to a coating composition or paint comprising a multistage latex with at least first and second stages, wherein the composition or paint is substantially free of volatile organic compounds (VOC) and capable of film formation even in the absence of coalescent agents. The base paint formulation is capable of being tinted at a point-of-sale (i.e. in-store) using a colorant composition of a type and quantity required to produce a paint of desired color and finish. The paints, show improved block resistance, scrub resistance and tack resistance. Rheological techniques as described herein may be used to determine tack resistance, print resistance, and other performance characteristics.

The present invention provides a powder-free polymeric coating comprising a latex polymer, a metal oxide and a cross-linking agent, the latex polymer comprising a diene and an acrylic acid; and a powder-free glove comprising the powderless coating polymer.

The present invention provides a powder-free polymeric coating comprising a latex polymer, a metal oxide and a cross-linking agent, the latex polymer comprising a diene and an acrylic acid; and a powder-free glove comprising the powderless coating polymer.

A latex for friction member use including rubber particles comprised of a carboxyl group-containing highly saturated nitrile rubber containing α,β-ethylenically unsaturated nitrile monomer units in a ratio of 10 to 60 wt % and having an iodine value of 120 or less, wherein a difference Δd (Δd=d90−d50) between a volume cumulative 90% particle size (d90) of the rubber particles and volume cumulative 50% particle size (d50) of the rubber particles which are measured by a light scattering method is 0.0240 μm or more is provided.