Production of polyurethane foam involves mixing polyol, isocyanate, and water to form polyurethane reaction mixture, generating bubble nuclei in mixture, flowing mixture, and applying mixture to substrate for foaming and curing

摘要

Polyurethane foam is produced by mixing polyol component, isocyanate component, water, and optionally additive in a mixing chamber at pressures 3-200 bar to form a polyurethane reaction mixture; generating bubble nuclei in the mixture by atomization in a pressure-reduction body at pressures 3-200 bar; flowing the mixture through a throttle body; and applying the mixture containing bubble nuclei to a substrate for foaming and curing. An Independent claim is also included for an apparatus for continuous production of polyurethane foam, comprising a mixing unit having a mixing chamber and supply lines for reaction components and a discharge opening for reaction mixture; a pressure-reduction body connected to the discharge opening; and an adjustable throttle body arranged in the direction of flow downstream of the pressure-reduction body.