New flexible polyurethane foams based on polyester polyols containing particulate inorganic filler, having low density and shrinkage and useful for producing moldings, especially shoe mid soles

摘要

New flexible polyurethane foams (A), based on polyester polyols (I), have density less than 0.3 g/cm 3, dimensional shrinkage less than 5% and thickness reduction less than 5% and contain more than 1 wt. % of a particulate inorganic filler (II). An independent claim is included for the preparation of (A). a polyurethane foam (A), obtained from (I) and (II) and containing a particulate inorganic filler (III), including a stage of forming a dispersion of (III) in (I), (A') being formed by reacting the dispersion with (II) in presence of a catalyst and a foaming agent.