The present invention provides a resin composition capable of giving a molded body having a metallic color tone and excellent in surface hardness, surface glossiness, mechanical properties, and flow mark reducing property. The present invention relates to a polyamide resin composition comprising 100 parts by mass of a polyamide (A), 0.1 to 50 parts by mass of a cellulose fiber (B) having an average fiber diameter of 10 μm or less and 0.1 to 12 parts by mass of a metallic pigment (C).

The present invention provides a resin composition capable of giving a molded body having a metallic color tone and excellent in surface hardness, surface glossiness, mechanical properties, and flow mark reducing property. The present invention relates to a polyamide resin composition comprising 100 parts by mass of a polyamide (A), 0.1 to 50 parts by mass of a cellulose fiber (B) having an average fiber diameter of 10 μm or less and 0.1 to 12 parts by mass of a metallic pigment (C).

An object of the present invention is to provide an epoxy resin composition that can be preferably used for prepreg and fiber reinforced composite material applications, has high Tg, and is excellent in elastic modulus and strength. The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (2): [A]: epoxy resin [B]: polyamine curing agent, and [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin, (1): at least a part of the component [C] satisfies that the sum of the polar component and the hydrogen bond component in the Hansen solubility parameters is 10.0 or less, (2): the ratio C/E of the amount by mole, E, for epoxy groups of the component [A] to the amount by mole, C, of the component [C] satisfying the condition (1) is 0.01 or more and 0.20 or less.

An object of the present invention is to provide an epoxy resin composition that can be preferably used for prepreg and fiber reinforced composite material applications, has high Tg, and is excellent in elastic modulus and strength. The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (2): [A]: epoxy resin [B]: polyamine curing agent, and [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin, (1): at least a part of the component [C] satisfies that the sum of the polar component and the hydrogen bond component in the Hansen solubility parameters is 10.0 or less, (2): the ratio C/E of the amount by mole, E, for epoxy groups of the component [A] to the amount by mole, C, of the component [C] satisfying the condition (1) is 0.01 or more and 0.20 or less.

To provide a rubber composition excellent in elasticity and low loss property.

A rubber composition comprising 100 parts by weight of a chloroprene rubber and from 1.2 to 3.0 parts by weight of cellulose nanofibers, characterized in that a vulcanized sheet obtained by vulcanizing the rubber composition has a 100% tensile stress (M100) increased by 1.5 MPa or more per part by weight of the cellulose nanofibers added, where the increase of M100 is calculated by subtracting M100 of a vulcanized sheet containing no cellulose nanofibers from M100 of the vulcanized sheet containing the cellulose nanofibers, and dividing the difference by the amount of the cellulose nanofibers contained.

To provide a rubber composition excellent in elasticity and low loss property.

A rubber composition comprising 100 parts by weight of a chloroprene rubber and from 1.2 to 3.0 parts by weight of cellulose nanofibers, characterized in that a vulcanized sheet obtained by vulcanizing the rubber composition has a 100% tensile stress (M100) increased by 1.5 MPa or more per part by weight of the cellulose nanofibers added, where the increase of M100 is calculated by subtracting M100 of a vulcanized sheet containing no cellulose nanofibers from M100 of the vulcanized sheet containing the cellulose nanofibers, and dividing the difference by the amount of the cellulose nanofibers contained.

A sealant for screwing members contains: (a) a self-cross-linking aqueous emulsion; (b) a nanofiberized aramid fiber substance; and (c) a film-forming aid containing a mixture. The mixture contains a compound represented by formula 1: CH.sub.3O—(CH.sub.2CH.sub.2O).sub.n—H. In formula 1, n is 4 or more. An equilibrium reflux boiling point of the overall mixture is 280° C. or higher.

Ceramics are capable of reducing color irregularities and uneven coating, hard to dissolve into glaze, and excellent in fixation. A water-based paint contains a coloring material, first cellulose nanofibers having a lignin content of 20 to 40 mass % and a water retention of 150 to 300%, and second cellulose nanofibers having a higher viscosity compared to the first cellulose nanofibers, and the water-based paint has a B-type viscosity of 600 cps or higher. Ceramic ware or glassware or the like having painting made on a green body of which surface is formed of silicic acid or silicate compound as a main component, with the water-based paint.

Textile reinforced elastomeric composites having a textile reinforcement embedded in an elastomeric matrix. The textile reinforcement includes fibers or yarns and an adhesive treatment applied to the fibers wherein the adhesive treatment comprises graphene or graphene oxide. The textile reinforcement may be a fabric or a tensile cord. The fibers may be polyester, aramid, carbon fiber, glass fiber, PBO, PEN, or polyamide. The adhesive treatment may be an epoxy treatment, an epoxy-latex treatment, an acrylic polymer treatment, a latex treatment, a polyurethane treatment, an RFL treatment, a rubber cement, or combinations thereof. The composite may be in the form of a toothed belt wherein the textile reinforcement is a tooth cover or a helically wound tensile cord embedded in the belt.

Provided is an amorphous epoxy fiber excellent in dimensional stability, a fiber structure comprising at least in part amorphous epoxy fibers, and a molded body formed by melting said fibers. The amorphous epoxy fiber has a birefringence value of 0.005 or lower. For example, the amorphous epoxy fiber may include an amorphous epoxy resin represented by the following general formula:

##STR00001## in which, X is a residue of a bivalent phenol and n is 20 or greater (preferably 20 to 300, more preferably 40 to 280, still more preferably 50 to 250). The amorphous epoxy fiber may have an average fiber diameter of single fibers of 40 μm or smaller.