Process for the production of polysiloxane ionomers, polysiloxane ionomers and their use for the production of cellular polyurethane elastomers

Abstract From the Canadian patent

The present invention is directed to a process for the production of waterproof, fine-cell polyurethane elastomers having a density of about 300 to 800 kg/m3 by reacting, a) organic polyisocyanates, b) polyhydroxyl compounds having a molecular weight of about 400 to about 8000, c) water and, optionally d) organic chain-extending agents containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of 32 to 399, the equivalent ratio of isocyanate groups to NCO-reactive groups in the overall formulation being about 0.90:1 to 1.20:1, characterized in that polysiloxane ionomers are added to the water/crosslinker component in concentrations of about 0.1 to 5% by weight …