Described herein is a polyurethane including a reaction product of an isocyanate component, a polyol component, and graphene nano platelets. The graphene nano platelets are reacted in an amount of from about 0.1 to about 20% by weight, based on a total weight of the polyurethane. The graphene nano platelets have an average lateral dimension (x, y) of from about 1 to about 100 μm, an average through-plane dimension (z) of from about 5 to about 100 nm, and an oxygen content of from about 0.01 to about 10% by weight, based on a total weight of the graphene nano platelets.

A rubber compound for the preparation of a tread portion of a pneumatic tyre. The compound comprises at least one cross-linkable unsaturated chain polymer base capable of assuming all of the chemical-physical and mechanical characteristics of an elastomer after cross-linking, a filler comprising silica, a plasticizing agent and a curing system. The cross-linkable unsaturated chain polymer base has a peak Tan δ value between −15° C. and 5° C. while the plasticizing agent is made up of an aliphatic chain comprising at least one polar group and has a melting temperature of between 5° C. and 40° C.

The invention relates to a thermoplastic elastomer with an excellent adhesion to cross-linked ethylene propylene diene rubber (EPDM) or rubber mixtures containing cross-linked EPDM. The invention also relates to the use of the thermoplastic elastomer according to the invention for producing a composite material with cross-linked EPDM or rubber mixtures containing cross-linked EPDM, as well as an article that comprises a thermoplastic elastomer according to the invention and cross-linked EPDM or rubber mixtures containing cross-linked EPDM. The present invention also relates to a process for producing a thermoplastic elastomer.

A composite molded article in which thermoplastic resin expanded beads are bonded via a thermosetting resin binder, wherein the composite molded article has a density of 0.05 to 0.5 g/cm.sup.3, and when heated at 100° C. for 20 minutes, the composite molded article has a volume expansion rate of 15 to 200%.

The claimed material relates to a mixed silica and silicate fiber and polymer composite having enhanced modulus, viscoelastic and rheological properties.

One embodiment of the present invention relates to a thermoplastic elastomer composition or a shaped article thereof. The thermoplastic elastomer composition includes 100 parts by mass of an ethylene/α-olefin/non-conjugated polyene copolymer (A) including constituent units derived from ethylene, a C3-C20 α-olefin and a non-conjugated polyene; 1 to 100 parts by mass of a crystalline polyolefin (B); 0.1 to 20 parts by mass of a polyorganosiloxane (C) having a viscosity at 25° C. (measured by a method in accordance with ASTM D 445-46T) of 100,000 cSt or less; and 0.1 to 3 parts by mass of a higher fatty acid amide (D).

One embodiment of the present invention relates to a thermoplastic elastomer composition or a shaped article thereof. The thermoplastic elastomer composition is a composition including 100 parts by mass of an ethylene/α-olefin/non-conjugated polyene copolymer (A); 20 to 80 parts by mass of a propylene polymer (B) having a melt flow rate (measured at 230° C. under 2.16 kg load in accordance with ASTM D 1238-65T) of 1 to 100 g/10 min; and 0.1 to 50 parts by mass of an inorganic filler (C); or is a composition obtained by dynamically crosslinking 100 parts by mass of an ethylene/α-olefin/non-conjugated polyene copolymer (A); 20 to 80 parts by mass of the propylene polymer (B); 0.1 to 50 parts by mass of an inorganic filler (C); and a crosslinking agent (D).

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.

Provided is a method for producing a thermoplastic elastomer composition that can form a molded article having both good appearance and high stiffness. The method for producing a thermoplastic elastomer composition comprises the following first step and second step, wherein the produced thermoplastic elastomer composition contains 5 mass % or less of a mineral oil (C): first step: a step of melt-kneading polypropylene (A-1) and an ethylene-based copolymer rubber (B) in the presence of an organic peroxide, the polypropylene (A-1) being polypropylene of which 20° C. xylene insoluble fraction has an intrinsic viscosity [η.sub.cxis] of 0.1 dl/g or more and less than 1.5 dl/g; and second step: a step of further adding polypropylene (A-2) of which 20° C. xylene insoluble fraction has an intrinsic viscosity [η.sub.cxis] of 1.5 dl/g or more and 7 dl/g or less, and melt-kneading the resulting mixture.

Provided is a thermoplastic elastomer composition obtained by melt-kneading an ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) that is a copolymer of ethylene, an α-olefin having 3 to 20 carbon atoms, and a non-conjugated polyene, a polyolefin resin (B), and a mineral oil-based softening agent (C) in the presence of an organic peroxide (D) and a crosslinking aid (E), the thermoplastic elastomer composition having a shear viscosity of from 5 Pa.Math.s to 20 Pa.Math.s at 140° C. and 10,000 s.sup.−1.