us4752507a-rubber vulcanizing agents comprising reaction

  • us4752507a - rubber vulcanizing agents comprising reaction

    US4752507A - Rubber vulcanizing agents comprising reaction

    Reaction products of sulfur with an unsaturated reactant selected from d-limonene, 5-ethylidene-2-norbornene, styrene, and dicyclopentadiene, reacted at a temperature above the melting point of sulfur and below 159° C. until chemically combined, then further reacted above the melting point of sulfur until solidified.

  • us4740559a - rubber vulcanizing agents comprising reaction

    US4740559A - Rubber vulcanizing agents comprising reaction

    Reaction products of sulfur with an unsaturated reactant selected from d-limonene, 5-ethylidene-2-norbornene, styrene, and dicyclopentadiene, reacted at a temperature above the melting point of sulfur and below 159° C. until chemically combined, then further reacted above the melting point of sulfur until solidified.

  • wo2014082172a1 - vulcanized rubber conversion - google patents

    WO2014082172A1 - Vulcanized rubber conversion - Google Patents

    Vulcanized rubber, for example from used tires, can be devulcanized to provide a reaction product that has similar rheological properties to the original un-vulcanized rubber. The vulcanized rubber is processed at a temperature that is less than a critical temperature of a solvent, such as water or water and alcohol.

  • vulcanization of epdm rubber compounds with and without

    Vulcanization of EPDM rubber compounds with and without

    Vulcanization of EPDM rubber compounds with and without blowing agents: Identification of reaction events and TTT‐diagram using DSC data Nora Catalina Restrepo‐Zapata Departamento de Materiales, Universidad Nacional de Colombia, Carrera 80 # 65‐223, Bloque, M3‐050 Medellín, Colombia

  • sulfur vulcanization

    Sulfur Vulcanization

    Vulcanization is a chemical process that converts natural rubber and other polydiene elastomers into cross-linked polymers. The most common vulcanization agent is sulfur. It forms bridges between individual polymer molecules when heated with rubber. Often a catalyst and initiator is added to accelerate the vulcanization process.

  • sulfur vulcanization

    Sulfur vulcanization

    Sulfur vulcanization is a chemical process for converting natural rubber or related polymers into materials of a variety of hardness, elasticity, and mechanical durability by heating them with sulfur or other equivalent curatives or accelerators.

  • us3968062a - use of para-tert. butyl phenol disulfide

    US3968062A - Use of para-tert. butyl phenol disulfide

    An improved process for preparing chlorobutyl rubber compositions employs, as curing agent, para-tert. butyl phenol disulfide having a sulfur content in excess of about 27 wt% and a softening point not less than 80°C.

  • indian patents. 250606:"vulcanizing agent that can be used

    Indian Patents. 250606:"VULCANIZING AGENT THAT CAN BE USED

    Example 1: Vulcanizing agent comprizing 80% of Vultac TB7® and 20% urea. The vulcanizing agent was prepared by simply mixing the product (I) and the compound of formula (II) in the powdered state. Example 2: Vulcanizable composition comprizing the vulcanizing agent of example 1 and a terpolymer of ethylene, propylene and ethylidene norbornene

  • bisamidrazone compound and vulcanizing agent

    Bisamidrazone compound and vulcanizing agent

    Bisamidrazone compound and vulcanizing agent for fluorinecontaining elastomer comprising the same reaction of the resulting 2,2 is a useful vulcanizing agent

  • reclamation and recycling of waste rubber

    Reclamation and recycling of waste rubber

    The coupling agent being present in an amount less than 3% by weight of the material to be coupled. A thermoplastic blend comprising of ground vulcanized rubber from both natural and synthetic rubber and polyolefin resin with one or more functionalized olefin polymer was developed. Both the composition and the process were patented .

  • effect of different sulfur content in natural rubber mixtures

    Effect of different sulfur content in Natural Rubber mixtures

    Keywords—vulcanization, sulfur, natural rubber, additives, cross-links. I. INTRODUCTION By far the most common vulcanizing methods depend on sulfur. Sulfur, by itself, is a slow vulcanizing agent and does not vulcanize synthetic polyolefins. Even with natural rubber, large amounts of sulfur, as well as high

  • studies on novel binary accelerator system in sulfur

    Studies on novel binary accelerator system in sulfur

    Vulcanization property and structure-properties relationship of natural rubber (NR)/silica (SiO2) composites modified by a novel multi-functional rubber agent, N-phenyl- N!-("-triethoxysilane

  • nityananda naskar's research works | indian association

    Nityananda Naskar's research works | Indian Association

    Nityananda Naskar's 17 research works with 196 citations and 705 reads, including: Reactive blending, reinforcement and curing of NR/BR/EPDM compounds for tyre sidewall applications

  • a comparison of tetraethylthiuram and tetramethylthiuram

    A comparison of tetraethylthiuram and tetramethylthiuram

    A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.