Patent ID: 6191179
Filing Date: 2001-02-20
Classification: C08G

Abstract:
A process for the preparation of a foamed plastic material based on polyisocyanate polyaddition products comprising reacting isocyanates with isocyanate-reactive compounds in the presence of catalysts and, optionally, auxiliaries and/or additives, whereini) said isocyanates contain isocyanurate and/or biuret structures, and said isocyanate-reactive compounds compriseii) at least one diol and/or polyol having a molecular weight of from 400 to 8000 and containing at least 50% of primary hydroxyl groups based on all of the hydroxyl groups present in the compound,iii) at least one compound having at least one primary amine group, and, optionally, as further components, diols and/or triols having molecular weights of less than 400, acting as chain-extending and/or crosslinking agents, wherein the reaction is carried out in the presence ofiv) at least one tertiary amine acting as catalyst and/orv) at least one metal salt acting as catalyst andvi) water.