Abstract: The present invention relates to an electrolyte membrane, a membrane-electrode assembly and a polymer electrolyte fuel cell. The electrolyte membrane contains a polymer (1) including a hydrophobic structural unit and a structural unit having a proton-conducting group and a polymer (2) including a hydrophobic structural unit having no sulfonic group which is different from the hydrophobic structural unit of the polymer (1).

Abstract: A method that includes, in the sequence set forth, (1) temporarily fixing a substrate onto a support via a temporary fixing material including a central section (A) having two or more layers and a peripheral section (B) with solvent resistance, section (B) being in contact with a peripheral portion of the support on the substrate side and with a peripheral portion of the substrate on the support side, section (A) being in contact with a central portion of the support on the substrate side and with a central portion of the substrate on the support side, the temporary fixing thus resulting in a stack in which section (A) is covered with the support, section (B) and the substrate; (2) processing the substrate and/or transporting the stack; (3) dissolving section (B) with a solvent; and (4) heating the residue of the temporary fixing material and separating the substrate from the support.

Abstract: A thermosetting resin composition of the present invention contains an epoxy resin (A), a crosslinked diene-based rubber (B) in which the content of bonded acrylonitrile is less than 10 wt %, and a curing agent (D) and/or a curing catalyst (E). A cured product obtained by curing the thermosetting resin composition is excellent in properties such as electric insulation properties and electrical properties.