POLYMER COMPOSITION OF HOT-MELT ADHESIVE (VERSIONS) Russian patent published in 2004 - IPC

FIELD: compositions on base of ethylene copolymer with vinyl acetate; adhesive layers in coats applied on metal articles, such as pipes. SUBSTANCE: according to first version, proposed polymer composition of holt-melt adhesive contains two copolymers of ethylene with vinyl acetate (I) and (II) having different content of vinyl acetate groups (5-20%), inorganic filler and modifying additive. According to second version, proposed polymer composition contains additionally third copolymer of ethylene with vinyl acetate (III) at content of 27-30% of vinyl acetate groups and melt yield point of 15-30 g/10 min. EFFECT: extended field of application; enhanced strength of adhesion; reduced rate of separation at cathodic polarization. 3 cl, 4 tbl, 18 ex