Abstract: A novel method for producing polyamide and/or polyester-amide copolymer is provided. The method of the present invention comprises the steps of: providing particles of the polyester, the polyester having pores extending from a surface of the particle to inside thereof; mixing the porous polyester with the diamine; and heating the mixture to the temperature not lower than a melting point of the diamine and not higher than a significant temperature of the polyester to cause reaction between the polyester and the diamine.

Abstract: A method of producing a polyamide resin by reacting with at least one diamine compounds at least one linear polyester resin consisting of at least one dicarboxylic acid component and at least one diol component and having an intrinsic viscosity of not less than 0.2 dl/g, so that the at least one diol component of the linear polyester resin is substituted by the diamine compound, resulting in the polyamide resin as a reaction product, wherein the improvement comprises: at least one of a carboxylic acid-activator and an inorganic salt being present in a reaction system of the linear polyester resin and the diamine compound.

Abstract: A method of producing a polyamide resin by reacting with at least one diamine compound, at least one linear polyester resin consisting of at least one dicarboxylic acid component and at least one diol component and having an intrinsic viscosity of not less than 0.2 dl/g, the at least one diamine compound being used in an amount of 0.5-1.5 mol per 1 mol of the at least one linear polyester resin as calculated in the repeating unit thereof, the linear polyester resin and the diamine compound being reacted in a reaction medium comprising at least one solvent selected from aprotic protophobic polar solvents, so that the at least one diol component of the linear polyester resin is substituted by the diamine compound, resulting in the polyamide resin as a reaction product.

Abstract: A method of producing a polyamide resin by reacting 1 mol of linear polyester resin (as calculated in repeating unit of the linear polyester resin) consisting of at least one dicarboxylic acid component and at least one diol component and having an intrinsic viscosity of not less than 0.2 dl/g with 0.5-1.5 mol of at least one diamine compound in a reaction medium comprising at least one solvent which is selected from the group consisting of hydrocarbons, halogenated hydrocarbons, ethers and acetals, so that the diol component of the linear polyester resin is substituted by the diamine compound to provide the polyamide resin as a reaction product.

Abstract: An image-bearing member suitable for carrying an electrostatic image and/or a toner image is formed by forming a surface layer on a substrate or a photosensitive layer. The surface layer comprises a polymerized and cured product of a photoionically polymerizable compound having two or more functional groups, and shows excellent mechanical and electrical resistance as well as excellent charge-retaining characteristic. As a result, the surface layer provides an image-bearing surface suitable for electrophotography. The surface layer may be a protective layer or a photoconductive layer when it constitutes a photosensitive member.

Abstract: Disclosed is a polyethylene terephthalate composition comprising:(A) 100 parts by weight of polyethylene terephthalate,(B) 1 to 25 parts by weight of a bisphenol type epoxy resin having an epoxy equivalent of 1000 or less,(C) 5 to 50 parts by weight of a thermoplastic resin,(D) 0 to 10 parts by weight of a modified thermoplastic resin containing at least one epoxy group, carboxyl group or carboxylic anhydride in a molecular chain of one molecule,(E) 0.1 to 2 parts by weight of a phosphorus type stabilizer and(F) 5 to 150 parts by weight of a glass fiber,wherein the composition has thermal stability, and is small in change of physical properties such as fluidity even when the composition dwells in a molding machine for a long time.

Abstract: The present invention discloses an image bearing member having a surface layer comprising a high-melting point polyester resin, a cured resin and an antioxidant, and an apparatus which uses the same.

Abstract: An image-bearing member suitable for carrying an electrostatic image and/or a toner image is formed by forming a surface layer on a substrate or a photosensitive layer. The surface layer comprising a high-melting point polyester resin shows a good dispersibility of the cured resin to provide a durable layer in combination with the cured resin, and also a lubricant, preferably a silicone-type one, whereby the surface layer provides an image-bearing surface suitable for electrophotography. The surface layer may be a protective layer or a photoconductive layer when it constitutes a photosensitive member.

Abstract: Disclosed is a polyalkylene terephthalate type flame retardant resin composition comprising:(A) 100 parts by weight of a polyalkylene terephthalate resin,(B) 30 to 250 parts by weight of a filler,(C) 5 to 50 parts by weight of an organic halogen compound having a glycidyl group, and(D) 5 to 50 parts by weight of sodium antimonate,wherein heat resistance is improved and change in molding stability is small even when it is exposed to high temperatures during molding.