PRIMER COATING FOR OLEFIN RESIN-METAL BONDED STRUCTURE

摘要

Abstract of the DisclosureAn olefin resin-metal bonded structure having adesirable combination of high corrosion resistance andpeel strength, which comprises a metal substrate andan olefin resin layer bonded together through a primerlayer, said primer layer containing (A) an oxidizedpolyethylene having an oxygen content of 0.1 to 10%by weight, a saponification value of 2 to 200, a densityof 0.90 to 1.2 and an average molecular weight of 1000to 50000 and (B) a coating-forming base resin having adensity higher by at least 0.1 than the oxidized poly-ethylene and containing a functional group selected fromhydroxyl and carbonyl groups at a concentration of atleast 1 meq/g, the mixing weight ratio of the oxidizedpolyethylene (A) and the base resin (B) being withinthe following range:(A) : (B) = from 0.2 : 99.8 to 45 : 55,wherein said primer layer has a multi-layer structurein which each of the concentrations of the oxidizedpolyethylene (A) and the base resin (B) is changed withrespect to the thickness direction with a certain gra-dient so that the base resin (B) is distributed predo-minantly on the side of the surface of the metalsubstrate and the oxidized polyethylene (A) is dis-tributed predominantly on the side of the surface ofthe olefin resin.