Bonding and coating agents for metals - consisting of ethylene copolymers with free carboxyl groups and azo or azomethine cpds

    公开(公告)号:DE2245559A1

    公开(公告)日:1974-04-04

    申请号:DE2245559

    申请日:1972-09-16

    Applicant: BASF AG

    Abstract: Coatings and adhesives for brass, Cu, Zn, iron and steel consist of an ethylene copolymer contg. 0.5-30 wt.% bound ethylenically unsatd. carboxylic acid in bound form and 0.01-5 wt.% (on ethylene copolymer) of a hydroxyl gp.-contg. azo- or azomethine cpd. of formula HO-A-N=X-B-OH in which A and B = phenyl- or naphthyl residues and B may also be derived from pyrazole or quinolone-2, or of formula: (in which R1 and R2=H, Cl, Br, NO2, SO3H, COOH, NH2, NHR3 and R3 = alkyl, aryl or phenoxy residue). Pref. copolymer contains 60-90 wt.% ethylene, 0.5-20 wt.% acrylic acid and 0.5-20 wt.% tert. butyl acrylate. The compsns. which give good bond strength with no deterioration in water can be used for coating the metals e.g. by melt extrusion, powder sintering, etc., for bonding the metals to Al, plastics, textiles, rubber, glass, etc., and for the construction of sandwich panels useful in building, behicles, aircraft, containers, etc.

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