| abstract |
The present invention provides a process for producing polyurethane molded foams having a density of molded parts of 500 g / l or less, wherein (a) an organic polyisocyanate is (b) a polyesterol, (c) an expanding agent, (d) ethylhexyl acryl A bubble-opening additive selected from the group consisting of homopolymers or copolymers based on rates, polybutadienes, polyisobutenes and diorganosilicones, or mixtures of two or more of these defoamers, (e) silicone-based bubble stabilizers and optionally (f) Mixing with a chain extender and / or crosslinker, (g) catalyst, and (h) other auxiliaries and / or additives to form a reaction mixture, fill the mold, and allow it to fully cure to form a polyurethane molded foam It is about how. The invention further relates to polyurethane molded foams obtainable by this method and to the use of such shaped articles as shoe soles, steering wheels, seats or armrests. |