A rubber composition for vibration damping rubbers, comprises a rubber component, a sulfur-based vulcanizing agent, a resin, and a bismaleimide. The resin is a mixed resin comprising at least an aromatic hydrocarbon resin and an aliphatic hydrocarbon resin. When the total amount of the rubber component is regarded as 100 parts by weight, the rubber composition preferably contains 1.5 parts by weight or less of the sulfur-based vulcanizing agent.

The invention relates to a method for producing a master batch comprising between 0.01 and 50 wt. % of carbonaceous nanofillers and at least one sulphurated material such as elemental sulphur by melt compounding, and to the master batch thus produced and the different uses thereof. The invention also relates to a solid composition comprising carbonaceous nanofillers dispersed in a sulphurated material.

An object of the present invention is to provide an SBR composition for a torsional damper in which the SBR composition has a good physical property balance of high load-bearing properties, low CS properties, and the kneadability and roll processability of a rubber material, and to provide a torsional damper. The object is achieved in such a manner that the SBR composition for the torsional damper comprises at least:(a) an SBR polymer having a combined styrene content of 10 wt % to 50 wt %; (b) carbon black comprising FEF grade carbon black and HAF grade carbon black blended at a ratio of FEF:HAF=1:3 to 3:1; (c) a crosslinking system including sulfur, a sulfur-donating compound, and an organic peroxide compound; and (d) a co-crosslinking agent, wherein 60 parts by weight to 100 parts by weight of the carbon black as total parts by weight of the FEF grade carbon black and the HAF grade carbon black is blended based on 100 parts by weight of the SBR polymer, 0.4 part by weight to 2.5 parts by weight of the sulfur is blended based on 100 parts by weight of the SBR polymer, the sulfur-donating compound is blended at 0.625 time to 12.5 times the blending amount of the sulfur, the organic peroxide compound is blended at 1.25 times to 12.5 times the blending amount of the sulfur, and 4 parts by weight to 16 parts by weight of the co-crosslinking agent is blended based on 100 parts by weight of the SBR polymer.

An object of the present invention is to provide an SBR composition for a torsional damper in which the SBR composition has a good physical property balance of high load-bearing properties, low CS properties, and the kneadability and roll processability of a rubber material, and to provide a torsional damper. The object is achieved in such a manner that the SBR composition for the torsional damper comprises at least:(a) an SBR polymer having a combined styrene content of 10 wt % to 50 wt %; (b) carbon black comprising FEF grade carbon black and HAF grade carbon black blended at a ratio of FEF:HAF=1:3 to 3:1; (c) a crosslinking system including sulfur, a sulfur-donating compound, and an organic peroxide compound; and (d) a co-crosslinking agent, wherein 60 parts by weight to 100 parts by weight of the carbon black as total parts by weight of the FEF grade carbon black and the HAF grade carbon black is blended based on 100 parts by weight of the SBR polymer, 0.4 part by weight to 2.5 parts by weight of the sulfur is blended based on 100 parts by weight of the SBR polymer, the sulfur-donating compound is blended at 0.625 time to 12.5 times the blending amount of the sulfur, the organic peroxide compound is blended at 1.25 times to 12.5 times the blending amount of the sulfur, and 4 parts by weight to 16 parts by weight of the co-crosslinking agent is blended based on 100 parts by weight of the SBR polymer.

Described are hydrosilylation-curable polyorganosiloxane compositions containing sulfur, including hydrosilylation-curable polyorganosiloxane prepolymers and hydrosilylation-cured polyorganosiloxane polymer products made therefrom, as well as methods of preparing and using the same, devices comprising or prepared from the same, and sulfur-functional organosiloxanes useful therein.

Described are hydrosilylation-curable polyorganosiloxane compositions containing sulfur, including hydrosilylation-curable polyorganosiloxane prepolymers and hydrosilylation-cured polyorganosiloxane polymer products made therefrom, as well as methods of preparing and using the same, devices comprising or prepared from the same, and sulfur-functional organosiloxanes useful therein.

Described are hydrosilylation-curable polyorganosiloxane compositions containing sulfur, including hydrosilylation-curable polyorganosiloxane prepolymers and hydrosilylation-cured polyorganosiloxane polymer products made therefrom, as well as methods of preparing and using the same, devices comprising or prepared from the same, and sulfur-functional organosiloxanes useful therein.

The present invention provides for a composition which is suitable for use in the vulcanization of rubber, and a process for producing the composition. The composition comprises a salt of a vulcanization accelerator which is selected from a group of accelerator classes including thiazoles, dithiocarbamates, dithiophosphates, sulfenamides, thiuram sulfides, xanthates, guanidines, aldehyde amines, or combinations thereof; a solid particulate substrate; and a hydrophobic carrier material.

The present invention provides for a composition which is suitable for use in the vulcanization of rubber, and a process for producing the composition. The composition comprises a salt of a vulcanization accelerator which is selected from a group of accelerator classes including thiazoles, dithiocarbamates, dithiophosphates, sulfenamides, thiuram sulfides, xanthates, guanidines, aldehyde amines, or combinations thereof; a solid particulate substrate; and a hydrophobic carrier material.

A metallic polypropylene resin composition is provided herein. The metallic polypropylene resin composition provides appearance characteristics that are similar to those provided by painting, but without painting. The metallic polypropylene resin composition of the present invention has excellent physical properties such as scratch resistance, and thus may be applied to molding methods, such as a molded in color (MIC) method. The resin composition is useful as a material for automobile interior and exterior parts, as wells as electric and electronic products, which can be molded by the MIC method.