| 摘要 |
PURPOSE:To bond a metal to a urethane elastomer in good durability of bonding, by forming and curing a specified resin layer on the surface of the metallic base, laying a prepolymer layer on the cured resin layer and casting and curing a urethane elastomer stock solution. CONSTITUTION:A film of a flake inorganic filler-containing thermosetting resin comprising 10-150pts.wt. flake inorganic filler of 24-250-mesh particles, such as glass flake or mica and 100pts.wt. epoxy resin, an unsaturated polyester resin or the like is formed and cured on the surface of a metallic base such as iron base so that the thickness of the film may be 30-500mu. On this cured resin film, a film of an isocyanate-terminated prepolymer of an terminal isocyanate content of 2-15% obtained by reacting an organic polyisocyanate such as tolylene diisocyanate with an active hydrogen-containing glycol such as propylene glycol at a molar ratio to provide an excess of isocyanate is formed and cured so that the thickness of the film may be 30-500mu. A solution of a uretyane elastomer of a type of polytetramethylene glycol is cast and cured on the side of the applied layers at 80 deg.C or above. |
