Intumescent compositions

Abstract

Optionally-foamed intumescent compositions obtained by reacting (a) polyisocyanates with (b) phosphorus-containing condensation products having at least 2 hydroxyl groups and obtained by condensing primary or secondary monoamines and/or polyamines optionally containing OH-groups, carbonyl compounds and dialkyl phosphites, optionally followed by alkoxylation, and (c) more than bifunctional polyethers having an average OH-number of from 150 to 500 which have been obtained by the addition of alkylene oxides, of which from 50 to 100% by weight consist of ethylene oxide, with low molecular weight starters, and (d) cyanuric acid and/or cyanuric acid derivatives, and (e) optionally water and (f) optionally other organic compounds containing isocyanate-reactive hydrogen atoms, are used, for example, as cavity-filling, gap-sealing or coating materials.

Dependencies are inferred from the claim text.