Patent ID: 8092879
Filing Date: 2012-01-10
Classification: B60K,C08G,C08J,C09D,F16L,Y10T

Abstract:
1. A fuel system comprising at least one of a fuel vessel, molded parts for a fuel and a tube for a fuel in which bodies are constituted from at least one of a thermoplastic resin and a synthetic rubber, wherein a coating layer is formed on the surfaces of the insides of at least one of the fuel vessel body, the molded part bodies for a fuel and the tube body for a fuel or at least one of connected parts in these bodies; the above coating layer is formed by curing an urethane resin composition comprising an active hydrogen-containing compound (A) and an organic polyisocyanate compound (B); and the above coating layer has a gasoline permeability coefficient of 0.2 g·mm/m 2 ·day or less at 23° C. and a relative humidity of 60% RH; wherein a skeletal structure represented by Formula (1), which is contained in the coating layer formed by curing said urethane resin composition, accounts for 20% by weight or more: wherein the active hydrogen-containing compound (A) comprises alkyleneoxide adducts of xylylenediamine produced by reacting alkyleneoxide and xylylenediamine with a molar ratio [(alkyleneoxide)/(xylylenediamine)] in a range of 2 to 16, and wherein the organic polyisocyanate compound (B) described above comprises a reaction product of (a) and (b) or a reaction product of (a), (b) and (c) each described below and has two or more NCO end groups: (a) xylylenediisocyanate, (b) at least one polyfunctional alcohol selected from the group consisting of C 2 to C 10 polyfunctional alcohols, (c) at least one compound selected from the group consisting of aromatic polyfunctional amines, aroaliphatic polyfunctional amines, alicyclic polyfunctional amines, aliphatic polyfunctional amines, aliphatic alkanol amines, aromatic polyfunctional carboxylic acids, alicyclic polyfunctional carboxylic acids and aliphatic polyfunctional carboxylic acids.