Process for the production of microcellular or foamed moldings and compounds containing isocyanate-reactive groups suitable for carrying out this process

A process for the production of a polyurethane-urea or polyurea-based microcellular or foam molding which comprises reacting in closed molds in accordance with the one-shot process

• (a) a polyisocyanate component containing aromatically bound isocyanate groups and selected from the group consisting of diisocyanates and polyisocyanates and
• (b) an isocyanate-reactive component which comprises at least one compound containing at least three aliphatic ether groups and n aliphatically bound isocyanate-reactive groups and is characterized by the following,
• (i) at least 100/n percent of said aliphatically bound isocyanate-reactive groups are aliphatically bound primary or secondary amino groups,
• (ii) at least 20% of the total number of aliphatically bound primary or secondary amino groups are modified amino groups selected from the group consisting of ammonium carbamate groups having a functionality of 2 in the isocyanate addition reaction and prepared by reacting aliphatically bound primary or secondary amino groups with carbon dioxide and ammonium carbonate and ammonium bicarbonate groups formed by the reaction of aliphatically bound primary or secondary amino groups with carbon dioxide and water,
• (iii) at least 20% of the total number of said modified amino groups of (ii) being carbonate and/or bicarbonate groups,
• (iv) the unmodified compounds containing ether groups but prior to containing ammonium carbamate, carbonate or bicarbonate groups having a molecular weight of from about 200 to 10,000 and
• (v) from about 0.2 to 100% of the total number of isocyanate-reactive groups of component (b) being ammonium carbamate, carbonate or bicarbonate groups.
• wherein n is a whole or fractional number from 2 to 4 and the ratio of component (a) to (b) is chosen to provide an isocyanate index of from 70 to 130.