Bayer Intellectual Property Gmbh

Jörg Buchner

Dirk Achten

Harald Kraus

Matthias Wintermantel

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 &#x2266;10&#xb0; C. and the olefin vinyl acetate copolymer (II) has a minimum film forming temperature (white point temperature) of &#x3e;+40&#xb0; 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.

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Bergisch Gladbach, Germany

Jörg Buchner