A rubber composition for a tire tread chimney component includes a sulfur-vulcanizable elastomer and an electrically conductive polymer. The rubber composition is further defined by an absence of electrically conductive carbon black. The sulfur-vulcanizable elastomer is selected from the group consisting of natural rubber, polybutadiene, polyisoprene, styrene butadiene rubber, nitrile rubber, and combinations thereof. The sulfur-vulcanizable elastomer and the electrically conductive polymer are substantially evenly mixed together. In the tire, and upon curing, the tire tread chimney component provides a dissipative pathway for static electricity from the tire to the ground in operation.

A method for preparing a butyronitrile rubber powder-based polyvinyl chloride (PVC) thermoplastic elastomer and a use of the butyronitrile rubber powder-based PVC thermoplastic elastomer in preparing automotive parts are provided. The method includes: activating a wasted nitrile butadiene rubber (NBR) powder; plasticizing one of NBR and chloroprene rubber (CR) to obtain a plasticized rubber; dispersing the activated NBR fine rubber powder with one of PVC and chlorinated polyethylene (CPE) in a kneader evenly to obtain a mixture; adding the mixture and pine tar into the plasticized rubber, then mixing evenly to obtain a mixed plastic; adding various compounding agents into the mixed plastic and dispersing evenly to perform cross-linking reaction, thereby obtaining the butyronitrile rubber powder-based PVC thermoplastic elastomer. By using the wasted NBR powder as a main material, which turns waste into treasure and has low cost, and the butyronitrile rubber powder-based PVC thermoplastic elastomer has excellent comprehensive performance.

A method for preparing a butyronitrile rubber powder-based polyvinyl chloride (PVC) thermoplastic elastomer and a use of the butyronitrile rubber powder-based PVC thermoplastic elastomer in preparing automotive parts are provided. The method includes: activating a wasted nitrile butadiene rubber (NBR) powder; plasticizing one of NBR and chloroprene rubber (CR) to obtain a plasticized rubber; dispersing the activated NBR fine rubber powder with one of PVC and chlorinated polyethylene (CPE) in a kneader evenly to obtain a mixture; adding the mixture and pine tar into the plasticized rubber, then mixing evenly to obtain a mixed plastic; adding various compounding agents into the mixed plastic and dispersing evenly to perform cross-linking reaction, thereby obtaining the butyronitrile rubber powder-based PVC thermoplastic elastomer. By using the wasted NBR powder as a main material, which turns waste into treasure and has low cost, and the butyronitrile rubber powder-based PVC thermoplastic elastomer has excellent comprehensive performance.

An adhesive composition is provided and includes the following components (A) to (D): (A) a radically polymerizable compound; (B) (B-1) a polymer consisting of at least one repeat unit derived from a polymerizable compound of formula (I), or (B-2) a polymer consisting of at least one repeat unit derived from a polymerizable compound of formula (I), and at least one repeat unit derived from another radically polymerizable compound; (C) a polymerization initiator; and (D) a reducing agent.

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An NBR composition, that is excellent in rubber material processability and vulcanized rubber hardness, comprising 93 to 105 parts by weight of carbon black with a carbon black grade of N330 or N550, 1.0 to 4.0 parts by weight of a vulcanization retarder, 2.0 to 5.0 parts by weight of thiazole-based and thiuram-based vulcanization accelerators, and 1.0 to 4.0 parts by weight of a sulfur-based vulcanizing agent, based on 100 parts by weight of NBR. The vulcanized molded product obtained from the NBR composition has a rubber hardness (Duro A, instant) of 85 or more according to JIS K6253 corresponding to ISO 18517, and can be effectively used as an automobile buffer material such as a stopper for electric power steering, a buffer material for nailers, a buffer material for devices equipped with hydraulic cylinders, or the like.

An NBR composition, that is excellent in rubber material processability and vulcanized rubber hardness, comprising 93 to 105 parts by weight of carbon black with a carbon black grade of N330 or N550, 1.0 to 4.0 parts by weight of a vulcanization retarder, 2.0 to 5.0 parts by weight of thiazole-based and thiuram-based vulcanization accelerators, and 1.0 to 4.0 parts by weight of a sulfur-based vulcanizing agent, based on 100 parts by weight of NBR. The vulcanized molded product obtained from the NBR composition has a rubber hardness (Duro A, instant) of 85 or more according to JIS K6253 corresponding to ISO 18517, and can be effectively used as an automobile buffer material such as a stopper for electric power steering, a buffer material for nailers, a buffer material for devices equipped with hydraulic cylinders, or the like.

An NBR composition, that is excellent in rubber material processability and vulcanized rubber hardness, comprising 93 to 105 parts by weight of carbon black with a carbon black grade of N330 or N550, 1.0 to 4.0 parts by weight of a vulcanization retarder, 2.0 to 5.0 parts by weight of thiazole-based and thiuram-based vulcanization accelerators, and 1.0 to 4.0 parts by weight of a sulfur-based vulcanizing agent, based on 100 parts by weight of NBR. The vulcanized molded product obtained from the NBR composition has a rubber hardness (Duro A, instant) of 85 or more according to JIS K6253 corresponding to ISO 18517, and can be effectively used as an automobile buffer material such as a stopper for electric power steering, a buffer material for nailers, a buffer material for devices equipped with hydraulic cylinders, or the like.

A method for producing a rubber composite includes mixing graphene with a liquid plasticizer to create a graphene/plasticizer solution, mixing the graphene/plasticizer solution with solid rubber and curing to form a preform, and shaping and vulcanizing the preform. The graphene/plasticizer solution may be a nonaqueous solution. The present disclosure also relates to a rubber composite part produced by the above-referenced method.

A method for producing a rubber composite includes mixing graphene with a liquid plasticizer to create a graphene/plasticizer solution, mixing the graphene/plasticizer solution with solid rubber and curing to form a preform, and shaping and vulcanizing the preform. The graphene/plasticizer solution may be a nonaqueous solution. The present disclosure also relates to a rubber composite part produced by the above-referenced method.

The present invention relates to a process for preparing a vulcanisable elastomeric compound for tyres, characterised by the use of a particular vulcanisation-activating filler and by the methods of adding additives, in particular the compatibilising agent (silane), which occurs only after completion of the reaction between the activating filler comprising zinc and the fatty acid (stearic acid). The present process, advantageous in itself due to the possible reduction of the times and of the energy required for vulcanisation, allows preparing compounds which, with the same performances compared to the traditional ones, can have a reduced zinc content, and consequently a lower release thereof from tyres during use at an environmental level.