Polyurethane Ionomers, a New Class of Block Polymers

Authors

  • Dr. D. Dieterich,

    1. Wissenschaftliches Hauptlaboratorium der Farbenfabriken Bayer AG, 509 Leverkusen-Bayerwerk (Germany)
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  • Dr. W. Keberle,

    1. Wissenschaftliches Hauptlaboratorium der Farbenfabriken Bayer AG, 509 Leverkusen-Bayerwerk (Germany)
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  • Dr. H. Witt

    Corresponding author
    1. Wissenschaftliches Hauptlaboratorium der Farbenfabriken Bayer AG, 509 Leverkusen-Bayerwerk (Germany)
    • Wissenschaftliches Hauptlaboratorium, der Farbenfabriken Bayer AG, 509 Leverkusen-Bayerwerk (Germany)
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  • Dedicated to Professor K. Hansen on the occasion of his 60th birthday

Abstract

Linear polyurethanes containing ionic centers at wide intervals are heteropolymers having a pronounced segment structure, i.e. ionomers. As a result of interactions between chains (Coulomb forces and hydrogen bonds), their properties are similar to those of crosslinked elastomers. They are strongly associated both in organic and in aqueous solutions. Polyurethane ionomers in polar organic solvents spontaneously form stable aqueous dispersions on addition of water, with the ionomer as the disperse phase. The particle size can be varied between 20 nm and 1 mm.

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