| abstract |
A flexible viscoelastic polyurethane foam formulation comprising: a) flame retardant selected from i) one or more chlorinated phosphate esters, ii) one or more brominated flame retardants, iii) one or more phosphorus-based halogen-free flame retardants, or iv) combinations of i), ii) and / or iii); b) at least one isocyanate having a functionality of at least two; c) at least one diol in which in the range of 50% to 95% of the terminal OH groups of the diol are primary OH groups; and, optionally, d) one or more i) surfactants, ii) antioxidants, iii) diluents, iv) chain extenders or crosslinkers, v) synergistic agents, preferably melamine; vi) plasticizers, vii) catalysts, viii) water, ix) alternative blowing agents such as methylene chloride, x) pigments, xi) cell openers. |