The present invention relates to the field of vulcanization of unsaturated polymers, in particular halogenated, and more particularly chlorinated, unsaturated polymers, such as, for example, polychloroprene, using as vulcanization agent a mixture of bis(2,5-dimercapto-1,3,4-thiadiazole) and at least one organic base. The present invention relates to the process for vulcanization of said polymers with said vulcanization mixture.

Disclosed is a method of manufacturing a surface-modified polymer film, including forming a hydroxyl group (OH) on the surface of a polymer film by subjecting the polymer film to light irradiation and surface treatment with a photoacid generator. The polymer film can be introduced with a hydroxyl group (OH) group using a photoacid generator, thereby modifying the surface of the polymer film without damage to the polymer film. Also, an organic electronic device including the surface-modified polymer film can be improved in electrical characteristics and stability.

Provided is a wiper blade rubber which has excellent wiping properties and low friction properties with respect to both clean glass surfaces and glass surfaces that have been subjected to a water repellent treatment, and which maintains these properties for a long period of time. A wiper blade rubber which has a lip part wherein a coating layer is provided on a rubber substrate by (a) applying a first coating agent onto a part of the surface of the rubber substrate, (b) curing a first coating layer by heating the rubber substrate onto which the first coating agent is applied, (c) applying a second coating agent onto the surface of the rubber substrate which has the cured first coating layer and (d) drying the second coating agent. The present invention enables the achievement of a wiper blade rubber wherein: the coating layer contains the first coating layer and the second coating layer; and the first coating layer is affixed to a part of the rubber substrate and the second coating layer is affixed to another part of the rubber substrate in the lip part.

Provided is a wiper blade rubber which exhibits high adhesion to glass surfaces, excellent friction performance and excellent wiping performance, while being free from the occurrence of a bulge (blister) in a coating layer due to bleeding from a rubber substrate or blooming. A wiper blade rubber which has a lip part obtained by forming a coating layer on a rubber substrate by spray coating, and which is characterized in that: the coating layer is composed of a portion (A) that covers the rubber substrate and portions (B) that do not cover the rubber substrate; the portions (B) are a plurality of pores which are uniformly dispersed in the entire area of the coating layer and have diameters of 10 to 40 m; and the ratio of the total area of portion (A) that covers the rubber substrate to the total area of the portions (B) that do not cover the rubber substrate is from 40:60 to 60:40.

In the manufacture of composite product, raw composite is layered on a shape or form and cured at a higher temperature. With some shapes, it is difficult or impossible to apply sufficient pressure to force and consolidate the composite material to adequately conform to the desired final shape during the curing process. The expandable tacky tape of this invention is comprised of a viscous medium incorporating thermally expandable material. Applied over the raw composite, the expandable tacky tape effectively forces the composite to conform to the desired shape during curing.

Disclosed herein are elastomer compounds comprising: at least one elastomer that is resistant to heat for 70 h at 100 C. such that the at least one elastomer exhibits at least one of the following properties selected from: (a) a change in durometer hardness of no more than 15 points, (b) a change in tensile strength of no more than 40%, and (c) a change in ultimate elongation of no more than 40% The elastomer compound further comprises at least one graphene-based material present in an amount ranging from 0.01 phr to 30 phr relative to the at least one elastomer and at least one carbon black present in an amount ranging from 15 phr to 150 phr relative to the at least one elastomer. Also disclosed are methods of making such compounds, and articles comprising elastomer compounds.

A method of treating an elastomeric workpiece is provided. The method includes: (a) providing an elastomeric workpiece; and (b) altering a mechanical property of the elastomeric workpiece by fluorinating the elastomeric workpiece in a controlled environment.

An inventive charging roller (1) includes a roller body (2) which is formed of a crosslinked product of a rubber composition containing a rubber component including 30 to 70 parts by mass of GECO, 15 to 60 parts by mass of IR and not less than 1 part by mass of SBR and/or NBR based on 100 parts by mass of the overall rubber component and has an outer peripheral surface (5) finished in a finish-polished surface. An inventive production method includes the steps of: forming a roller body (2) from the crosslinked product of the rubber composition described above; and wet-polishing or mirror-polishing an outer peripheral surface (5) of the roller body (2) into a finish-polished surface.

A curable composition is provided comprising a curable rubber comprising: a ) 80.0-99.9 wt % of a chloroprene resin; b) 0.06-13 wt % of trimethyl thiourea; and c) 0.06-13 wt % of a benzothiazolesulfenamide, such as N-cyclohexyl-2-benzothiazoles-ulfenamide. The present disclosure additionally provides cured compositions comprising a rubber comprising a crosslinked chloroprene resin and a fire retardant particle system comprising: d) 5-95 wt % particulate magnesium hydroxide (Mg(OH).sub.2); and e) 5-95 wt % particulate aluminum trihydrate (Al(OH).sub.3). In some embodiments the particulate aluminum trihydrate (Al(OH).sub.3) has a mean particle size of greater than 30 microns and less than 400 microns, and more typically a mean particle size of greater than 82 microns. The present disclosure additionally provides sound barrier films comprising the cured compositions according to the present disclosure, in particular fire resistant sound barrier films.

A production method comprising: (a) a step of melt-mixing a base resin containing a chlorinated polyethylene; an organic peroxide, an inorganic filler, and a silane coupling agent, in specific ratios, at a temperature equal to or higher than a decomposition temperature of the organic peroxide, to prepare a silane master batch; (b) a step of mixing the silane master batch obtained in the step (a) with a silanol condensation catalyst, and then forming the resultant mixture; and conducting at least one of the melt-mixing in the step (a) and the mixing in the step (b) is performed in the coexistence of a chloroprene rubber or a polyvinyl chloride; a heat-resistant chlorine-containing crosslinked resin formed body produced by the method, a silane master batch, a mixture and formed body thereof, and a heat-resistant product.