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    • 5. 发明公开
    • Process and composition for coating a metallic substrate with a polymeric film
    • 一种用于与聚合物膜涂覆金属基材的方法和组合物。
    • EP0103332A1
    • 1984-03-21
    • EP83201267.8
    • 1983-09-02
    • ANIC S.p.A.
    • Cesca, SebastianoPriola, AldoRenzi, Fiorenzo
    • B05D7/14C09D3/80C09D3/81B05D3/02
    • B05D7/142B05D3/0272C09D4/00C08F220/26
    • There is disclosed the coating of a metallic substrate with a cross-linked polymeric film by contacting the substrate with an aqueous composition containing:

      - at least an acrylic or metacrylic compound which can be defined by the general formula:
      wherein:

      R is a straight-line or branched aliphatic hydrocarbon radical, either saturated or unsaturated containing from 2 to 10 carbon atoms, or a cycloaliphatic or an aromatic group;
      R, and R 2 , equal to or different from one another, are straight-line or branched alkyl groups, either saturated or unsaturated and containing from 1 to 8 carbon atoms, or cycloaliphatic or aromatic groups;

      -at least one unsaturated organic acid capable of being ' copolymerized with the compound (I), in an amount of from 5 to 40 parts by weight per 100 parts of the compound (I) or an organic or a mineral acid which cannot be copolymerized with the compound (I) in an amount of from 1 to 10 parts by weight per 100 parts of the compound (I). and
      - a polymerization catalyst preferably selected from among the persulphates, the hydroperoxides, the peracids H 2 O 2 and the peroxides.

      A metallic substrate coated by the composition of polymeric nature as described above ist than heated to a temperature equal to, or lower than 180 °C approximately and for the time which is necessary to originate a polymeric film cross-linked upon said substrate.
      A film so deposited exhibits optimum properties as to adherence, resistance to bending and shocks and resistance to the saline mist.