Hot-sealable coating systems and method for joining surfaces

摘要

Hot-sealable coating systems and method for joining surfaces The present invention relates to a hot-sealable coating system, comprising a polyurethane and/or polyurethane-polyurea polymer (I) and an olefin vinyl acetate copolymer (II). The polyurethane and/or polyurethane-polyurea polymer (I) is obtainable by the reaction of (A) at least one diol and/or polyol component, (B) at least one di- and/or polyisocyanate component, (C) at least one component having sulphonate and/or carboxylate groups, (D) mono-, di- and/or tri-amino-functional and/or hydroxyamino-functional compounds (as appropriate), (E) other isocyanate-reactive compounds (as appropriate). The polyurethane and/or polyurethane-polyurea polymer (I) has a glass transition temperature of ≦10° C. and the olefin vinyl acetate copolymer (II) has a minimum film forming temperature (white point temperature) of >+40° C. The invention also relates to the use of the coating system and a method for joining surfaces in which the coating system according to the invention is used.

主权项

1. A hot-sealable coating composition, comprising:
(I) a polyurethane and/or polyurethane-polyurea polymer which is obtained by the reaction of:
(A) at least one diol and/or polyol component,(B) at least one di- and/or polyisocyanate component,(C) at least one component comprising sulphonate and/or carboxylate groups,(D) optionally mono-, di- and/or tri-amino-functional and/or hydroxyamino-functional compounds,(E) optionally other isocyanate-reactive compounds; and (II) an olefin vinyl acetate copolymer, wherein the polyurethane and/or polyurethane-polyurea polymer (I) has a glass transition temperature of ≦10° C.; the glass transition temperature being determined by differential scanning calorimetry according to DIN 65467 at a heating rate of 20 K/min; and wherein the olefin vinyl acetate copolymer (II) has a minimum film forming temperature (white point temperature) of >40° C.; the minimum film forming temperature being determined by differential scanning calorimetry according to DIN ISO 2115 (white point temperature) at a heating rate of 20 K/min.