A stator compound including an acrylonitrile butadiene isoprene rubber (NBIR) terpolymer elastomeric base.

A stator compound including an acrylonitrile butadiene isoprene rubber (NBIR) terpolymer elastomeric base.

A method of devulcanizing vulcanized rubber is described. The method includes steps of: (a) providing at least one vulcanized rubber composition; (b) grinding the vulcanized rubber into chips or pellets; (c) mixing the ground rubber obtained from step (b) in such a way as to homogenize the form and temperature of same; (d) carrying out a non-degrading mechanical treatment on the mixed rubber at the end of step (c) to obtain a polymeric composite. Also described is a thermoplastic material and an elastomeric mixture which comprise, in the formulation of same, at least one polymeric composite obtained by this method of devulcanization.

An improved polymerization process using a specific molecular weight regulator makes it possible to produce new nitrile rubbers featuring particularly low emission values and giving vulcanizates which have an advantageous profile of properties and which are of outstanding quality, in particular in odor-sensitive applications.

A dip-formed article obtained by dip forming a dip-forming composition containing a latex of a carboxyl group-containing nitrile rubber, wherein at least one surface is surface treated, a thickness is 0.02 to 0.2 mm, a coefficient of dynamic friction of the surface treated surface is 0.5 or less, and a tensile strength after surface treatment is 30 MPa or more is provided.

Disclosed herein are polysaccharide-elastomer masterbatch compositions and processes for preparing the masterbatch compositions. One method comprises a step of a) mixing i) an aqueous polysaccharide dispersion, or ii) a basic aqueous polysaccharide solution, with a rubber latex solution containing a rubber component to form a mixture. The method further comprises the steps of: b) coagulating the mixture obtained in step a) to produce a coagulated mass; and c) drying the coagulated mass obtained in step b). The masterbatch compositions are useful in preparing rubber-containing articles.

A composition adapted for the production of a thermosetting elastomer with antimicrobial capabilities by vulcanization by molding includes an elastomer, a catalyst and/or a vulcanization activator, and an antimicrobial additive that includes zinc pyrithione and silver phosphate glass in a 1:1 ratio by weight.

A toner supply roller is provided which has the most uniform and greatest possible foam cell diameters and a lower hardness particularly even in a lower-temperature and lower-humidity environment as compared with the conventional art and is less liable to suffer from imaging failure such as uneven density and white streaks. An image forming apparatus employing the toner supply roller is also provided. The toner supply roller (1) is produced by preparing a rubber composition which contains a rubber component including an epichlorohydrin rubber and an acrylonitrile butadiene rubber, an electrically conductive carbon black, a crosslinking component and a foaming component and, while extruding the rubber composition into a tubular body, continuously foaming and crosslinking the rubber composition of the tubular body by a continuous crosslinking apparatus including a microwave crosslinking device and a hot air crosslinking device. The image forming apparatus incorporates the toner supply roller (1).

There is provided a magnetic rubber composition comprising a rubber (A), a thermosetting resin (B) and a magnetic powder (C), wherein a mass ratio (A/B) of the rubber (A) to the thermosetting resin (B) is 0.2 to 5, and a mass ratio [C/(A+B)] of the magnetic powder (C) to the total mass of the rubber (A) and the thermosetting resin (B) is 0.5 to 20. It gives a magnetic rubber molded article excellent in flexibility and abrasion resistance, and a magnetic encoder produced therewith.

A cross-linked rubber is excellent in both fuel oil resistance and cold resistance. A cross-linkable rubber composition contains: a nitrile group-containing copolymer rubber [A] including less than 30 wt % ,-ethylenically unsaturated nitrile monomer units (a1), conjugated diene monomer units (b1), and ,-ethylenically unsaturated dicarboxylic acid monoester monomer units (d1), wherein at least part of the conjugated diene monomer units (b1) is hydrogenated; a nitrile group-containing copolymer rubber [B] including not less than 30 wt % ,-ethylenically unsaturated nitrile monomer units (a2) and conjugated diene monomer units (b2), wherein at least part of the conjugated diene monomer units (b2) may be hydrogenated; and an amine-based cross-linking agent.