The present invention relates to a composition for making a hydrophobic elastomeric article comprising a liquid polymer; 0.01 to 1.5 phr of carbon black; and 1 to 15 phr of hydrophobic dispersion comprises activated charcoal, a dispersing agent and a stabilizer.

A diaphragm and a sound generating apparatus. The diaphragm comprises at least one elastomer layer, and the elastomer layer is made of a rubber compound. The rubber compound comprises nitrile rubber and hydrogenated nitrile rubber. Both the nitrile rubber and the hydrogenated nitrile rubber contain acrylonitrile blocks. In terms of mass percentage, the range of the content of acrylonitrile blocks is 20% to 80%. The described diaphragm has excellent mechanical strength, cold resistance, and resilience, and has high damping performance.

Provided is a dip molding composition 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 to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1 to 10% by weight, and the butadiene-derived structural unit in an amount of 50 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 including a latex (A) of a diene rubber (a) having a weight average molecular weight of 50,000 or more and 1,000,000 or less and containing an ethylenically unsaturated acid monomer unit; and a latex (B) of a diene rubber (b) having a weight average molecular weight of 500 or more and less than 50,000 and containing an ethylenically unsaturated acid monomer unit.

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.

The invention provides a variety of novel devices, systems, and methods of utilizing mixed-ionic-electronic conductor (MIEC) materials adapted to function with an applied current or potential. The materials, as part of a circuit, are placed in contact with a part of a human or nonhuman animal body. A sodium selective membrane system utilizing the MIEC is also described.

The invention provides a variety of novel devices, systems, and methods of utilizing mixed-ionic-electronic conductor (MIEC) materials adapted to function with an applied current or potential. The materials, as part of a circuit, are placed in contact with a part of a human or nonhuman animal body. A sodium selective membrane system utilizing the MIEC is also described.

This invention addresses the need for efficient dry skin electrodes. Robust, flexible Mixed Ionic Electronic Conductor (MIEC) electrodes were prepared by an aqueous solution route resulting in electrically conductive networks of carbon nanotubes (CNTs) and ionically conductive elastic matrix. The flexible electrode was characterized in terms of conductivity, ionic charge transfer resistance, and water uptake. The flexible electrode maintained low resistance even after multiple cycles of 50% extension and contraction.

A coating fabric and method of manufacturing the same are provided. A coated fabric includes a base coating layer. The base coating layer defines a smooth coating to resist liquid penetration to the fabric. The coated fabric also includes a middle foam coating layer that is deposited on at least a portion of the base coating layer. The middle foam layer defines a middle layer foam density and is configured to absorb at least a portion of liquid. The coated fabric further includes an outer foam coating layer that is deposited on at least a portion of the middle foam coating later. The outer foam layer defines an outer layer foam density and is configured with holes to allow liquid to penetrate to the middle foam layer. The middle layer foam density is less than the outer layer foam density. A corresponding method of manufacturing is also provided.

Provided is a dip molding composition 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 to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1 to 10% by weight, and the butadiene-derived structural unit in an amount of 50 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.