The present invention relates to a polyurethane microcellular elastomer, a non-pneumatic tire and a preparation process and use thereof. The polyurethane microcellular elastomer of the present invention is obtained by reaction of a reaction system comprising components such as isocyanate, ethylene diamine-started polyoxypropylene ether tetraol, a catalyst and a foaming agent. The non-pneumatic tire of the present invention has very strong fatigue resistance and can be used for non-motor vehicles running at high speed.

An object of the present disclosure is to provide a polymer which is recyclable and capable of performing as equally well as a new product. Another object of the present disclosure is to provide a rubber composition containing said polymer, a method for manufacturing said rubber composition, and a rubber product containing said rubber composition. To achieve the objects, the present disclosure provides a complex polymer, comprising: a polymer main chain containing a conjugated diene unit and/or an olefin unit; and a functional group bonded to the polymer main chain, wherein: the functional group contains nitrogen atom and/or phosphorus atom therein and is complexed with a metal ion of an element of group 7-10 in the Periodic Table; and the bond dissociation energy for dissociation of the metal ion and the functional group is 200 kJ/mol or more.

The present disclosure relates to an adhesive composition and a method of manufacturing a nonpneumatic tire using the same, and more specifically, to an adhesive composition comprising a linear structured prepolymer for polyurethane having a cyclic carbonate group at both ends thereof and a polyfunctional amine, and a method of manufacturing a nonpneumatic tire using the same.

A thermoplastic polyurethane (TPU) foam product with high flatness, and a preparation method and a use thereof are provided. The TPU foam product is prepared by processing aliphatic thermoplastic polyurethane (ATPU) beads with a melting range of 20° C. to 50° C. and a melting point of 90° C. to 160° C. by a physical gas foaming process to obtain foamed ATPU beads and heating the foamed ATPU beads with a heat source to make the foamed ATPU beads fused. The TPU foam product with high flatness has a density of 0.08 g/cm.sup.3 to 0.8 g/cm.sup.3 and a flatness value of less than 2 mm, and the flatness value is determined by a fixed-length ruler. The TPU foam product not only has high flatness such that diversified designs are allowed for a surface of the product, but also has high resilience.

The present technology provides a tire rubber composition formed by blending a microparticle composite, which is formed from a solid component of a mixture containing an emulsion of an organic microparticle and a rubber latex, in a sulfur vulcanizable rubber; the emulsion of the organic microparticle being an emulsion containing a microparticle obtained by polymerizing and/or crosslinking at least one selected from the group consisting of polymerizable monomers, and oligomers, prepolymers, and polymers having a reactive functional group and having a molecular weight from 500 to 50000 simultaneously or stepwise in water; and an average particle size of the microparticle being from 0.001 to 100 μm.

Polyurethane and polyurethane-urea compositions are prepared by amine cure under catalyzed reaction conditions. The curing reaction is performed with an acid anhydride based curing catalyst which is added to a prepolymer and then subsequently reacted with an amine based curative.

A polyurethane microcellular elastomer, a non-pneumatic tire and a preparation process and use thereof are provided. The polyurethane microcellular elastomer is obtained from a polyurethane reaction system comprising components such as isocyanate, trimethylolpropane-started polycaprolactone triol, a catalyst and a foaming agent. The non-pneumatic tire produced from the polyurethane microcellular elastomer has very strong fatigue resistance and can be used for non-motor vehicles running at high speed.

The present invention relates to a tire valve, in particular a bicycle tire valve, comprising a tubular stem, where the stem consists of a composition (Z1) comprising a thermoplastic (P1) and comprising a filler (F1), and also to a valve stem for the production of a tire valve, where the valve stem is tubular and consists of a composition (Z1) comprising a thermoplastic (P1) and comprising a filler (F1). The present invention further relates to the use of the valve of the invention for the production of a molding comprising an inflatable tube section, in particular an inner tube for a tire, and also to the use of the valve of the invention for the production of a tubeless bicycle tire.

The present invention relates to a tyre (100) for vehicle wheels comprising at least one carcass structure (101), a tread band (109) applied in a position radially external to said carcass structure, and a pair of sidewalls (108) applied laterally on the opposite sides with respect to said carcass structure, where on at least one sidewall of said pair of sidewalls (108), a label (120) is applied comprising a protective layer (121), an adhesive layer (123), and possibly one or more ink layers (122) interposed between said protective layer (121) and said adhesive layer (123), where said adhesive layer (123) adheres the label (120) to the surface of said sidewall, where said protective layer (121) comprises polyester-based and/or polyether-based cross-linked aliphatic polyurethanes exhibiting dynamic elastic modulus values E′, measured at 25° C., static tensile deformation 1%, dynamic deformation +0.1%, and frequency 1 Hz, equal to or higher than about 5 MPa, and a residual deformation measured at 25° C. after 4 cycles of deformation from 0% to 12%, equal to or lower than about 1%.

Low molecular weight, high Tg resins, with applications including tire additives and adhesives. An oligomer is obtained by ring opening metathesis polymerization (ROMP) of a sterically encumbered cyclic monomer with an olefinic chain transfer agent. The sterically encumbered cyclic monomer and the olefinic chain transfer agent are present in the polymerization at a molar ratio of from 2:1 to about 40:1. Also, methods for making the oligomer by ROMP.