Method for producing foamed molded bodies

A method for producing foamed molded bodies comprising the steps of

• A) providing a mold, and
• B) introducing a foam-forming reaction mixture from a mixing head into the mold under variable pressure of injection, wherein the foam-forming reaction mixture exits the mixing head at a speed which decreases over time from an initial exit speed to a decreased exit speed, wherein the initial exit speed and the decreased exit speed are each in the range of >1 m/s to <5 m/s,
• and
• wherein the foam-forming reaction mixture has a fiber time at 20° C. of ≧20 s to ≦60 s
• wherein the foam-forming reaction mixture comprises an emulsion, and wherein the emulsion contains the following constituents:
• (I) an isocyanate-reactive composition A containing a polyol mixture A1 of at least three polyols A1a, A1 and A1e as continuous phase
• and
• (II) at least one physical blowing agent T as disperse phase,
• wherein:
• (i) A1a is a polyether polyol having a hydroxyl number of 15 mg KOH/g to 550 mg KOH/g and having a functionality of 1.5 to 6.0, obtained by addition reaction of an epoxide onto one or more starter compounds selected from the group consisting of carbohydrates and di- or higher-functional alcohols;
• (ii) A1b is a polyether polyol having a hydroxyl number of 100 mg KOH/g to 550 mg KOH/g and having a functionality of 1.5 to 5.0, obtained by addition reaction of an epoxide onto an aromatic amine;
• and
• (iii) A1e is a polyester polyether polyol having a hydroxyl number of 100 mg KOH/g to 450 mg KOH/g and having a functionality of 1.5 to 3.5, obtained by addition reaction of an epoxide onto the esterification product of an aromatic dicarboxylic acid derivative and a di- or more highly functional alcohol.