Abstract: A polyimide precursor for obtaining a polyimide film having excellent adhesiveness to metals and improved transmittance in the UV-visible range, a polyimide in which the polyimide precursor is used, a polyimide film in which the polyimide is used, and a method for manufacturing a triazine compound used for manufacturing the polyimide precursor, polyimide film and polyimide.

Abstract: A polyimide film, which is produced by the reaction of a tetracarboxylic acid component comprising 3,3?,4,4?-biphenyltetracarboxylic dianhydride as the main component and a diamine component comprising p-phenylenediamine as the main component, is heated at a temperature of from 460° C. to 550° C., and then water or an alkaline aqueous solution is sprayed on a surface of the polyimide film for surface treatment, thereby improving adhesiveness, while maintaining the excellent properties inherent in the polyimide film.

Abstract: A method for manufacturing a polyimide-metal laminate including forming a polyimide film, in which at least surfaces of both sides of the film are formed by thermally fusion-bondable polyimide layers (a), and thermal compression-bonding metal layers on both sides of the polyimide film; in which forming the polyimide film includes reacting a tetracarboxylic dianhydride component with a diamine component containing a diamine compound represented by general formula (1) to give a solution of a polyamic acid (a), forming a self-supporting film from the solution of the polyamic acid (a) and imidizing the self-supporting film by heating at a maximum heating temperature of 440° C. or lower to form the polyimide layer (a); in which R1 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms; and R2 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms.

Abstract: A method for manufacturing a polyimide-metal laminate including forming a polyimide film, in which at least surfaces of both sides of the film are formed by thermally fusion-bondable polyimide layers (a), and thermal compression-bonding metal layers on both sides of the polyimide film; in which forming the polyimide film includes reacting a tetracarboxylic dianhydride component with a diamine component containing a diamine compound represented by general formula (1) to give a solution of a polyamic acid (a), forming a self-supporting film from the solution of the polyamic acid (a) and imidizing the self-supporting film by heating at a maximum heating temperature of 440° C. or lower to form the polyimide layer (a); in which R1 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms; and R2 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms.

Abstract: Disclosed are a polyimide precursor for obtaining a polyimide film having excellent adhesiveness to metals and improved transmittance in the UV-visible range, a polyimide in which the polyimide precursor is used, a polyimide film in which the polyimide is used, and a method for manufacturing triazine compound used for manufacturing these. The polyimide precursor contains a structural unit represented by general formula (I): in which A is a tetravalent aromatic group or aliphatic group and B is a divalent aromatic group, wherein B in general formula (I) comprises a triazine moiety represented by following formula (B1): in which R1 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms, and R2 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms.

Abstract: A polyimide film having improved adhesiveness is produced by flow-casting a solution of a polyamic acid, which is prepared by reacting a tetracarboxylic acid component and a diamine component, on a support, and drying the solution to form a self-supporting film; applying a solution containing a surface treatment agent to one side or both sides of the self-supporting film, wherein the solvent of the surface treatment agent solution is a water-soluble liquid and has a surface tension of 32 mN/m or less at 20° C. and a boiling point of 125° C. or higher; and heating the self-supporting film to provide a polyimide film.

Abstract: A polyimide film, which is produced by the reaction of a tetracarboxylic acid component comprising 3,3?,4,4?-biphenyltetracarboxylic dianhydride as the main component and a diamine component comprising p-phenylenediamine as the main component, is heated at a temperature of from 460° C. to 550° C., and then water or an alkaline aqueous solution is sprayed on a surface of the polyimide film for surface treatment, thereby improving adhesiveness, while maintaining the excellent properties inherent in the polyimide film.

Abstract: A material for fuel system parts is provided, which is excellent in alcohol gasoline permeation-preventing property and impact resistance and suitably usable for the parts attached to a fuel tank or a fuel hose. A material for fuel system parts, comprising a polyamide resin composition which comprises (A) a polyamide resin, (B) a layered silicate, (C) a polyolefin and (D) an impact resistant material and in which (A) the polyamide resin having dispersed therein (B) the layered silicate forms a matrix phase and at the same time, a dispersion phase of a core-shell particle structure with the core being (C) the polyolefin and the shell being (D) the impact resistant material is present in the matrix.