Production of flexible polyurethane foams
AssigneeBASF SE
InventorsBernd Bruchmann, Heinz-Dieter Lutter
Life of this patent
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Abstract
In a process for producing flexible polyurethane foams by the reaction known per se of polyisocyanates with compounds containing at least two hydrogen atoms which react with isocyanate, the reaction is carried out in the presence of cyclic or heterocyclic compounds containing at least one reactive hydrogen atom.
Claims15
A method for producing flexible polyurethane foams comprising:
- reacting at least one polyisocyanate with a compound containing at least two isocyanate-reactive hydrogen atoms in the presence of a cyclic or heterocyclic compound containing at least one isocyanate-reactive hydrogen atom, wherein the cyclic or heterocyclic compound is selected from the group consisting of aromatic mono-alcohols, imidazoles, oxazolines, oxazolidines, morpholines, pyrrolidinones, cyclic acetals, and cyclic ketals.
A flexible viscoelastic polyurethane foam comprising the reaction product of at least one polyisocyanate with a compound containing at least two isocyanate-reactive hydrogen atoms and a cyclic or heterocyclic compound containing at least one isocyanate-reactive hydrogen atom, said cyclic or heterocyclic compound selected from the group consisting of aromatic mono-alcohols, imidazoles, oxazolines, oxazolidines, morpholines, pyrrolidionones, cyclic acetals, and cyclic ketals incorporated into the foam structure.
Dependencies are inferred from the claim text.