Patents Examined by Rabin Sergent
  • Method for preparing polyurea - polyurethane flexible foams
    Patent number: 5314928
    Abstract: A method for preparing a polyurethane/polyurea flexible foam which comprises reacting:A. an organic prepolymer-containing polyisocyanate composition of NCO content of from 2 to 15% by weight;B. an isocyanate reactive component in which the isocyanate-reactive species comprises at least 40% by weight of water and at least one chain extender of molecular weight below 1000 which is selected from those having at least two amine groups of which at least one is directly attached to a cyclic hydrocarbon residue and from diamino polyols.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: May 24, 1994
    Assignee: Imperial Chemical Industries PLC
    Inventor: Gabriel Verhelst