The present invention provides a prepreg that has high impact resistance despite being an all-carbon-fiber FRP (CFRP), the prepreg moreover enabling a molding time to be set to five minutes or less and making it possible to reduce molding costs. This prepreg is obtained by impregnating carbon fiber with a matrix resin comprising a mixture of a thermoplastic resin, a thermosetting resin, and a curing agent, wherein: the thermoplastic resin is a phenoxy resin; the thermosetting resin is a urethane acrylate resin; the thermoplastic resin and the thermosetting resin are compounded in a mass ratio of 15:85-35:65 (thermoplastic resin/thermosetting resin); and the curing agent causes cross-linking to occur due to a radical polymerization reaction, and is formed so as to include first and second peroxides having mutually different initiation temperatures, initiation of the second peroxide starting at a temperature at which termination of the first peroxide occurs.

Polyether- or polyester-epoxide polymer (PEEP) compositions are disclosed. The compositions comprise reaction products of a polyepoxide compound and a polyol composition. The polyol composition has a melting point within the range of 20 C. to 100 C. and a hydroxyl number less than 35 mg KOH/g. The PEEP composition is a solid-solid phase-change material. As measured by differential scanning calorimetry (DSC) at a heating/cooling rate of 10 C./minute, the PEEP composition has a transition temperature within the range of 10 C. to 70 C., a latent heat at the transition temperature within the range of 30 to 200 J/g, and little or no detectable hysteresis or supercooling upon thermal cycling over at least five heating/cooling cycles that encompass the transition temperature. The PEEP compositions should enable formulators to manage thermal energy changes in many practical applications, including automotive, marine or aircraft parts, building materials, appliance insulation, electronics, textiles, garments, and paints or coatings.

The method of the polyurethane polyol comprises (1) dissolving 2,3-epoxybutane and an acid catalyst in an inert solvent to obtain a solution A; dissolving triethylene glycol in an inert solvent to obtain a solution B; and dissolving epoxy vegetable oil in an inert solvent to obtain a solution C; (2) respectively and simultaneously pumping the solutions A and B into a first micromixer for mixing; (3) pumping the solution C and an effluent of the first microreactor into a second micromixer for mixing while carrying out step (2); and (4) dissolving the vegetable oil polyol in an inert solvent to obtain a solution D; dissolving epoxypropane and an alkaline catalyst in an inert solvent to obtain a solution E; and pumping the solution D and the solution E into a tank reactor for reaction, thereby obtaining the polyurethane polyol.

The present invention relates to a process for preparing a polyurethane, comprising the reaction of a composition (Z1) at least comprising a compound (P1) reactive toward isocyanates, and a composition (Z2) at least comprising a polyisocyanate, wherein compound (P1) is obtained by the reaction of at least one polyepoxide with a compound (V1) selected from the group consisting of polyetheramines and polyetherols. The present invention further relates to polyurethanes obtained by such a process, and to the use of a polyurethane of the invention for coating of pipelines, as a field joint or of subsea equipment, for example christmas trees, for the offshore sector, and as a glass-syntactic polyurethane.

A rigid foam including the reaction product of an (poly)isocyanate, and a polyethercarbonate polyol copolymer is described. The polyethercarbonate polyol copolymer is derived from the copolymerisation of one or more epoxides with CO2, wherein the total-CO2 content of the polyethercarbonate polyol copolymer is between 1 and 40 wt %, the carbonate linkages are <95% of the total linkages from the copolymerisation, and the molecular weight is between 100 to 5000 g/mol. The foam is a polyurethane foam, more typically, a polyisocyanurate or a mixed polyisocyanurate/polyurethane foam. Methods, polyols and compositions for producing the foams are also described.

A film capacitor that includes a dielectric resin film having a glass transition temperature of 160 C. or higher and a density at 25 C. of 1.22 g/cm.sup.3 to 1.26 g/cm.sup.3; and a metal layer on at least one surface of the dielectric resin film.

The present invention relates to brominated polyether polyols, processes for the production as well as intermediates useful in the production of the same and to processes for the preparation of flame-retardant blends, premixes as well as polyurethane foams.

Disclosed are compositions that comprise water and a polyether polyol derived from sucrose and an alkylene oxide, as well as polyurethane foam systems comprising such compositions, methods for their production, and the resulting polyurethane foams.

A polymerizable composition of the present invention includes a polymerization reactive compound (A), and an internal release agent (B) including a polyether-modified silicone compound (b1) represented by General Formula (1) and a polyether-modified silicone compound (b2) represented by General Formula (2), in which the polymerization reactive compound (A) is one or more compounds selected from a polyiso(thio) cyanate compound, a poly(thio) epoxy compound, a polyoxetanyl compound, a polythietanyl compound, an alkyne compound, a poly(thi)ol compound, a polyamine compound, an acid anhydride, or a polycarboxylic acid compound.

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The method includes: a) a step of stacking and shaping a prepreg according to the shape of a surface of the structure; b) a step of vacuum-pressurizing the stacked and shaped prepreg; c) a step of heating and curing the vacuum-pressurized prepreg to produce a cured product of the prepreg; and d) a step of bonding the cured product to the surface of the structure. The prepreg includes: a resin composition including an ethylenically unsaturated group-containing resin (A) and a polymerization initiator (B); and reinforcement fibers (C). The polymerization initiator (B) has a 10-hour half-life temperature of 60? C. to 75? C. This method for reinforcing and repairing the structure allows a structure having excellent workability and excellent mechanical strength to be obtained.