A prepreg comprising: carbon fibers; and a resin composition containing an epoxy resin having a biphenyl structure, a curing agent, and melamine cyanurate.

A thermosetting resin composition at least including: [A] an epoxy resin containing two or more glycidyl groups; [B] a cyanate ester resin containing two or more cyanate groups; and [C] an amine compound; and satisfying the following conditions (1) and (2): (1) 0.25≤the number of moles of glycidyl groups in the thermosetting resin composition/the number of moles of cyanate groups in the thermosetting resin composition≤1.5; and (2) 0.05≤the number of moles of active hydrogen contained in the amino groups in the thermosetting resin composition/the number of moles of cyanate groups in the thermosetting resin composition<0.5; and a prepreg and a fiber reinforced composite material using the thermosetting resin composition. Provided are a thermosetting resin composition having excellent mechanical properties and heat resistance in a high-temperature environment after moisture absorption, and having excellent reactivity that allows curing in a short time; a prepreg prepared by impregnating a reinforced fiber with a thermosetting resin composition, which prepreg has excellent handling ability (tackiness properties) at room temperature; and a fiber reinforced composite material including a thermosetting resin composition and a reinforced fiber.

The present specification relates to a method for manufacturing a polarizer and a polarizer manufactured by using the same, and more particularly, to a method for manufacturing a polarizer, which includes a cross-linking and elongating step using an aqueous solution including a polyvalent carboxylic acid compound and a boric acid compound, and a polarizer manufactured by using the same.

The present specification relates to a method for manufacturing a polarizer and a polarizer manufactured by using the same, and more particularly, to a method for manufacturing a polarizer, which includes a cross-linking and elongating step using an aqueous solution including a polyvalent carboxylic acid compound and a boric acid compound, and a polarizer manufactured by using the same.

Provided is a resin composition containing: a modified polyphenylene ether compound terminally modified with a substituent having an unsaturated carbon-carbon double bond; a cross-linking curing agent having an unsaturated carbon-carbon double bond in its molecule; a silane coupling agent having a phenylamino group in its molecule; and silica. A content of the silica is 60 to 250 parts by mass with respect to a total of 100 parts by mass of the modified polyphenylene ether compound and the cross-linking curing agent.

A prepreg is provided. The prepreg is prepared by impregnating a liquid crystal polymer non-woven fabric with a thermal-curable resin composition or by coating a thermal-curable resin composition onto a liquid crystal polymer non-woven fabric and drying the impregnated or coated liquid crystal polymer non-woven fabric, wherein the thermal-curable resin composition includes: (A) an unsaturated monomer; and (B) a cyclic olefin copolymer including the following repeating units: (B-1) a repeating unit of formula (I), ##STR00001## (B-2) a repeating unit of formula (II), ##STR00002##
and (B-3) a repeating unit of formula (III), ##STR00003## R.sup.1 to R.sup.22, m, n, o, and p in formulas (I) to (III) are as defined in the specification, wherein based on the total moles of the repeating units (B-1) to (B-3), the content of the repeating unit (B-2) is 19 mol % to 36 mol %, and wherein the weight ratio of the cyclic olefin copolymer (B) to the unsaturated monomer (A) is 0.5 to 7.

There is provided an insertion auxiliary tube having a tubular substrate a and a layer b disposed on at least one of an inside or an outside of the tubular substrate a. The layer b includes a polymer including a polysiloxane structure. The polymer includes an acrylic acid component, an acrylic acid ester component, an acrylamide component, or a styrene component and has a particular polar group in a molecule thereof. There are also provided a composition for an insertion auxiliary tube capable of providing the insertion auxiliary tube, a set of the insertion auxiliary tube and an endoscope, an endoscope apparatus including the insertion auxiliary tube and an endoscope, and a method for producing the insertion auxiliary tube.

There is provided an insertion auxiliary tube having a tubular substrate a and a layer b disposed on at least one of an inside or an outside of the tubular substrate a. The layer b includes a polymer including a polysiloxane structure. The polymer includes an acrylic acid component, an acrylic acid ester component, an acrylamide component, or a styrene component and has a particular polar group in a molecule thereof. There are also provided a composition for an insertion auxiliary tube capable of providing the insertion auxiliary tube, a set of the insertion auxiliary tube and an endoscope, an endoscope apparatus including the insertion auxiliary tube and an endoscope, and a method for producing the insertion auxiliary tube.

One purpose of the present invention is to provide an epoxy resin composition which is for obtaining a fiber-reinforced composite material that combines heat resistance with tensile strength on a high level. The other purpose is to provide: a fiber-reinforced composite material obtained using this epoxy resin composition; and a molded article and a pressure vessel both containing the fiber-reinforced composite material. The present invention has the following configuration in order to achieve the above purposes. Namely, the epoxy resin composition includes the constituent element [A]: An epoxy resin including an aromatic ring and having a functionality of 2 or higher and the following constituent element [B]: An acid anhydride-based hardener, and is characterized in that a cured object obtained by curing the epoxy resin composition has a rubber-state modulus of 10 MPa or less when evaluated for dynamic viscoelasticity and the cured object has a glass transition temperature of 95° C. or higher.

A copper-clad laminate including at least one of a copper layer having a roughened surface is disclosed. The copper-clad laminate is obtained by roughening at least one surface of a base copper layer so as to have a low profile comprising a copper layer having a thickness of from 5 μm to 70 μm and a resin layer on the copper layer, wherein a peeling strength between the copper layer and the resin layer is more than 0.6 N/mm when the thickness of the copper layer is more than 5 μm, wherein a ten-point mean roughness Sz of the roughened surface is lower than that of the base copper layer.