| abstract |
The present invention provides a process for producing a rigid polymer foam, Reacting the following components A to C in the presence of the following component D, or Comprising reacting an isocyanate functional prepolymer of the following components A and B with the following component C in the presence of the following component D, The total amount of these components is 100% by weight, Wherein the reaction occurs with the release of carbon dioxide. ≪ RTI ID = 0.0 > (A) 35 to 65% by weight of at least one polyisocyanate component A, (B) at least one polyol component B, from 5 to 50% by weight, (C) 1 to 59% by weight of at least one polycarboxylic acid component C, and (D) at least one Lewis base component D, 0.01 to 3% by weight. |