Abstract:
An EPDM composition for a torsional damper. The EPDM composition is made of (a) an EPDM polymer, (b) liquid polyolefin oligomer, and (c) carbon black, the EPDM composition containing 100 parts by weight of EPDM polymer that is the EPDM polymer of (a) having a propylene content of 35 to 50 wt % in the total amount of ethylene and propylene, 5 to 30 parts by weight of liquid polyolefin oligomer that is the liquid polyolefin oligomer of (b) having a number average molecular weight Mn within a range of 3,000 to 4,000, and 10 to 120 parts by weight of carbon black that is the carbon black of (c) having a nitrogen adsorption specific surface area within a range of 100 to 150 m2/g, an iodine adsorption within a range of 110 to 160 mg/g, and a DBP oil absorption within a range of 70 to 135 cm3/100 g.
Abstract:
Embodiments of the disclosure generally provide flame retardant compositions and methods comprising organic polymers, mineral fillers, high surface area mineral fillers and process aids. Compositions of the disclosure additionally are comprised of high surface area hydrated metal carbonate fillers, including the mesoporous amorphous magnesium carbonate filler Upsalite. The filler's porous structure and high surface area provides high water capacity, enhanced physical and chemical interaction with a polymer in composite, lower by weight loadings of filler in a composite, as well as effective flame retardancy.
Abstract:
A silica-containing resin composition, characterized by containing a resin and silica particles in an amount of 5 to 300 parts by mass, with respect to 100 parts by mass of the resin, wherein the silica particles satisfy the following requirements (a) to (c): (a) the silica particles have a specific surface area, as determined through a nitrogen absorption method, of 20 to 500 m2/g; (b) the silica particles have a percent moisture absorption of 5.0 mass % or less at a relative humidity of 50%; and (c) the silica particles contain substantially no metallic impurity or halogen.
Abstract:
A rubber composition for tires comprises: per 100 parts by weight of diene rubber containing from 5 to 50 wt. % of terminally modified S-SBR, from 2 to 50 parts by weight of an aromatic modified terpene resin having a softening point of 100° C. or higher. A total content of 60 to 130 parts by weight of two types of silica, that is silica X and silica Y. A functional group of the modified S-SBR has reactivity with a silanol group. A proportion of the silica relative to a total amount of a reinforcing filler containing the silica X, the silica Y, and an optionally compounded carbon black is 85 wt. % or greater. A nitrogen adsorption specific surface area of the silica X is 140 m2/g or greater; a nitrogen adsorption specific surface area of the silica Y is greater than 100 m2/g and less than 140 m2/g.
Abstract:
Elastomeric compositions containing a combination of selected carbon blacks. The resultant elastomers have improved durability and/or power generation. Such elastomers may be used in oilfield products, for example, as seals or stator liners. Methods of producing these elastomeric compositions are also disclosed.
Abstract:
A functionalized silica product includes particles of a hydrophobated silica having a coating of a polymer. A ratio of the hydrophobated silica to the polymer is from about 0.3/1 to about 100/1. The functionalized silica product may be in the form of a friable crumb or a powder, or in the form of a bale, that may be mixed into an elastomer formulation for a rubber article, such as a tire component.
Abstract:
A low-density polyethylene nanocomposite comprising 5 weight percent or more of at least one nanoscale filler selected from the group consisting of montmorillonite clay, silica and zinc oxide. Changes in weatherability of the three low-density polyethylene nanocomposites based on the nanoscale fillers are determined. A surface area of the nanoscale filler in the nanocomposites is from 10 m2/g to 50 m2/g.
Abstract:
Particular embodiments include run-flat tires having sidewall supports that are manufactured from a rubber composition that is based upon a tin end-functionalized polybutadiene rubber as well as an additional second rubber component and a mixture of carbon blacks. The first carbon black may be characterized as being a low-surface area, high-structure carbon black and the second carbon black may be characterized as a low-surface area carbon black. The low-surface area, high-structure carbon black may be added to the rubber composition in an amount that provides a modulus of elongation at 10% measured at 23° C. of between 8 MPa and 10 MPa.
Abstract:
Coating compositions containing graphenic carbon particles are disclosed. The graphenic carbon particles may be thermally produced and dispersed in thermoset and/or thermoset polymeric film coatings. The cured coatings exhibit desirable properties such as increased electrical conductivity
Abstract:
A rubber wet masterbatch obtained, using at least a carbon black, a dispersing solvent, and a latex solution of a rubber as raw materials, the carbon black being a carbon black having an iodine adsorption number of 41 mg/g or less, and the rubber wet masterbatch being obtained through the following process: a process in which at the time of dispersing the carbon black into the dispersing solvent, at least one portion of the rubber latex solution is added to the carbon-black-dispersed solvent to produce a slurry solution comprising the carbon black to which rubber latex particles adhere, subsequently the slurry solution is mixed with the rest of the rubber latex solution, and next the mixture is solidified and dried.