Patent ID: 9150684
Filing Date: 2015-10-06
Classification: C08G

Abstract:
1. A process for producing a high resilience flexible polyurethane foam, the processing comprising mixing (a) an isocyanate prepolymer, (b) a polymeric compound having an isocyanate-reactive group, (c) castor oil, (d) optionally a chain-extending and/or crosslinking agent, (e) a catalyst, (f) a blowing agent, and also optionally (g) an additive, to form a reaction mixture and reacting the reaction mixture to form a flexible polyurethane foam having a density of 20 to 100 g/l and a resilience of greater than 40% as measured by DIN EN ISO8307, wherein more than 5 wt % of (c) castor oil is used, based on the total weight of components (b) to (g), and (a) the isocyanate prepolymer is obtained by mixing (a1) diphenylmethane diisocyanate and (a2) a first polyol and also optionally a second polyol, chain extender and/or crosslinker, wherein (a2) the first polyol comprises a polyalkylene oxide polyol having a hydroxyl number of 30 to 60, an average functionality of 2.3 to 3.2 and a propylene oxide fraction, based on the alkylene oxide content of (a2) the first polyol, 100 wt %.