HYBRID SOLVENT-BORNE POLYURETHANE ADHESIVES
    8.
    发明公开

    公开(公告)号:EP4012002A1

    公开(公告)日:2022-06-15

    申请号:EP20212819.5

    申请日:2020-12-09

    摘要: 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.