| abstract |
The invention relates to polyol mixtures which contain internal mold release agent mixtures and optionally further auxiliaries.n n n The production of hard, semi-hard and flexible polyurethane materials is often carried out in such a way that a polyol mixture is mixed with polyisocyanates by machine and injected into a mold in which the reaction mixture which is reacting is then cured, possibly with the formation of layers of different densities. The mold can be made of various materials (such as steel, aluminum or epoxy resin) and can be heated or unheated. |