A roll covering includes a functional layer formed of a polymer which is a blend of at least one rubber and one millable polyurethane rubber. The polymer includes from 65% by weight to 85% by weight of the at least one rubber and from 15% by weight to 35% by weight of the millable polyurethane rubber. A roll having the roll core, a method of using the roll and a combination of the roll and a heated drying cylinder are also provided.

This invention relates to a novel process for selectively and efficiently hydrogenating nitrile rubber in the presence of specific complex catalysts system comprising an NHC-ligand comprising Ru-complex catalyst and a specific hydrogenation enhancer.

This invention relates to improved adhesion compositions and textile materials and articles treated therewith. The improved adhesion composition comprises a non-crosslinked resorcinol-formaldehyde and/or resorcinol-furfural condensate (or a phenol-formaldehyde condensate that is soluble in water), a rubber latex, and an aldehyde component such as 2-furfuraldehyde. The composition may be applied to textile substrates and used for improving the adhesion between the treated textile substrates and rubber materials. End-use articles that contain the treated textile-rubber composite include, without limitation, automobile tires, belts, and hoses as well as printing blankets.

This invention relates to improved adhesion compositions and textile materials and articles treated therewith. The improved adhesion composition comprises a non-crosslinked resorcinol-formaldehyde and/or resorcinol-furfural condensate (or a phenol-formaldehyde condensate that is soluble in water), a rubber latex, and an aldehyde component such as 2-furfuraldehyde. The composition may be applied to textile substrates and used for improving the adhesion between the treated textile substrates and rubber materials. End-use articles that contain the treated textile-rubber composite include, without limitation, automobile tires, belts, and hoses as well as printing blankets.

The present invention provides a nitrile group-containing highly saturated copolymer rubber comprising an α,β-ethylenically unsaturated nitrile monomer unit in a content of 15 wt % or more and less than 28 wt %, an α,β-ethylenically unsaturated monocarboxylic acid ester monomer unit (b) in a content of 10 to 50 wt %, and a conjugated diene monomer unit (c) in a content of 22 to 75 wt %, and having an iodine value of 120 or less, wherein the conjugated diene monomer unit (c) is at least partially hydrogenated, and a proportion of an isoprene unit in the conjugated diene monomer unit (c) is 33 wt % or more.

A method for producing a composition containing a latex of a nitrile rubber of α,β-ethylenically unsaturated nitrile monomer unit of 8 to 60 wt % content, and an iodine value of 120 or less, an isothiazoline-based compound represented by formula (1), and a benzisothiazoline-based compound represented by formula (2), both in a content of 26 ppm by weight or more to the rubber, wherein adding both compounds to the latex at 2,000 ppm by weight/min or less, at 50° C. or lower, and the compounds in an aqueous state having 0.1 to 40 wt % concentration. ##STR00001## formula (1), R.sup.1 and formula (2), R.sup.4 represents a hydrogen atom, or a substituted or unsubstituted organic group; wherein formula (1) R.sup.2 and R.sup.3 represent a hydrogen atom, a halogen atom, or an substituted organic group; and formula (2), R.sup.5 represent a hydrogen atom, or an substituted organic group, and an integer “n” of 0 to 4.

A method for producing a composition containing a latex of a nitrile rubber of α,β-ethylenically unsaturated nitrile monomer unit of 8 to 60 wt % content, and an iodine value of 120 or less, an isothiazoline-based compound represented by formula (1), and a benzisothiazoline-based compound represented by formula (2), both in a content of 26 ppm by weight or more to the rubber, wherein adding both compounds to the latex at 2,000 ppm by weight/min or less, at 50° C. or lower, and the compounds in an aqueous state having 0.1 to 40 wt % concentration. ##STR00001## formula (1), R.sup.1 and formula (2), R.sup.4 represents a hydrogen atom, or a substituted or unsubstituted organic group; wherein formula (1) R.sup.2 and R.sup.3 represent a hydrogen atom, a halogen atom, or an substituted organic group; and formula (2), R.sup.5 represent a hydrogen atom, or an substituted organic group, and an integer “n” of 0 to 4.

A rubber composition including a nitrile group-containing copolymer rubber with an iodine value smaller than or equal to 120; short fibers with an average fiber length smaller than or equal to 12 mm; and an organophosphorus compound, wherein a glass transition temperature difference ΔTg of the nitrile group-containing copolymer rubber is lower than or equal to 10° C.

A cord of a toothed belt is made of a twisted yarn including a band-like material. The band-like material includes a filament bundle of high-strength glass fibers integrated together through a binder. The binder contains a rubber component, at least either a maleimide-based compound or a polyisocyanate compound, and a powdery inorganic filler. A surface of a reinforcing fabric facing opposite to the toothed belt body is coated with a surface-coating rubber layer made of a rubber composition containing a rubber component including hydrogenated nitrile-butadiene rubber as a main part.

The present invention relates to the use of a vulcanisable composition comprising HNBR-PEG acrylate copolymer for production of vulcanisates that are in contact with coolant.

The invention further relates to the use of a vulcanisate produced from a vulcanisable composition comprising HNBR-PEG acrylate copolymer as a component part, preferably as a gasket or as a hose, in contact with coolant.