HYBRID SOLVENT-BORNE POLYURETHANE ADHESIVES

An adhesive composition comprises a polyurethane polymer, a solvent and a co-solvent, wherein the polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having a mass average molecular weight Mw, as determined by gel permeation chromatography against polysty...

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Bibliographische Detailangaben
Hauptverfasser:	ACHTEN, Dirk, SCHUSTER, Fabian, BIJLARD-JUNG, Ann-Christin, TILLACK, Joerg
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY DYES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL PAINTS POLISHES USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	An adhesive composition comprises a polyurethane polymer, a solvent and a co-solvent, wherein the polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having a mass average molecular weight Mw, as determined by gel permeation chromatography against polystyrene standards using N,N-dimethyl acetamide as the eluent, of ≥ 50000 g/mol, the solvent is a polar-aprotic solvent such as MEK and the co-solvent is water.The polyurethane polymer, the solvent and the co-solvent are present in such amounts that they form a dispersion.The polyurethane polymer content is ≥ 10 weight-%, based on the total weight of the composition.