Hot-sealable coating systems and method for joining surfaces

US9187680B2 · kind B2 · utility

Assignee

• Bayer Intellectual Property GmbH · DE

Inventors

• Jörg Büchner · Bensberg, DE
• Harald Kraus · Leverkusen, DE
• Matthias Wintermantel · Bensberg, DE
• Dirk Achten · Leverkusen, DE

Key dates

• Filing date: Nov 8, 2011
• Grant date: Nov 17, 2015
• Expiry date: Nov 8, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2203/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

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.