| abstract |
Viscoelastic polyurethane foam is produced by using certain additives in the foam formulation. These additives include: 1) alkali metal salts or transition metal salts of carboxylic acids; 2) 1,3,5-trisalkyl- or 1,3,5-tris (N, N-dialkylaminoalkyl) -hexahydro -S-triazine compounds; and 3) Ci-12 carboxylates of quaternary ammonium compounds. These additives significantly improve processability and in particular allow the use of higher isocyanate indexes and help improve the physical properties of the foam. |