Abstract: Flexible polyurethane foams are produced from a polyisocyanate and a polyether polyol which has been alkoxylated in the presence of a double metal cyanide catalyst and that has at least one ethylene oxide-propylene oxide mixed block.

Abstract: .alpha.- and/or .beta.-tocopherol (vitamin E), optionally in combination with octylated diphenylamines, is combined with a polyether polyol having a molecular weight of from about 300 to about 10,000 to stabilize that polyether polyol. Polyether polyols which are stabilized in this manner are particularly useful in the production of polyurethanes and polyurethane foams with a reduced tendency toward discoloration.

Abstract: Low-fog flexible polyester polyurethane foams are produced by reactinga) polyisocyanates, withb) polyesters containing at least two hydroxyl groups and having a molecular weight in the range from 400 to 10,000,in the presence ofc) water and/or readily volatile organic compounds as blowing agentswherein prior to reacting, the polyesters have been subjected to continuous distillation over an average holding time of 2 to 600 s, at a temperature of 160.degree. to 250.degree. C., and under a pressure of 0.05 to 10 mbar.The reaction mixture may optionally containd)compounds containing at least two active hydrogen atoms and having a molecular weight in the range from 32 to 400 as chain-extending and crosslinking agents, and/ore) auxiliaries and additives known per se.These low-fogging polyester polyurethane foams are extremely suitable for use in vehicles, preferably automobiles.

Abstract: Low-fog flexible polyester polyurethane foams are produced by reactinga) polyisocyanates, withb) polyesters containing at least two hydroxyl groups and having a molecular weight in the range from 400 to 10,000, in the presence ofc) water and/or readily volatile organic compounds as blowing agentswherein prior to reacting, the polyesters have been subjected to continuous distillation over an average holding time of 2 to 600 s, at a temperature of 160.degree. to 250.degree. C., and under a pressure of 0.05 to 10 mbar.The reaction mixture may optionally contain d) compounds containing at least two active hydrogen atoms and having a molecular weight in the range from 32 to 400 as chain-extending and crosslinking agents, and/ore) auxiliaries and additives known per se.These low-fogging polyester polyurethane foams are extremely suitable for use in vehicles, preferably automobiles.

Abstract: The present invention relates to a method for stabilizing a polyether polyol having a molecular weight of from about 300 to about 10,000 comprising adding 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid as an antioxidant stabilizer, optionally in combination with other antioxidants, to said polyether polyol. This invention further relates to polyols stabilized by the method of this invention and to stabilized polyurethanes prepared from such stabilized polyols.

Abstract: The invention is directed to a process for the production of highly elastic, open-celled foams containing urethane groups by reacting polyether polyols with modified polyisocyanates in the presence of cross-linking agents and water characterized in that the reaction is carried out in the presence of 0.5 to 10 g/100 g of the polyether of a cross-linking mixture corresponding to the general formulaC.sub.n H.sub.2n+2 O.sub.nwherein n=2 to 10,which has a statistical average of at least four hydroxyl groups per molecule.

Abstract: The present invention relates to a process for the production of modified polyether polyols by the radical polymerization of a mixture of acrylonitrile, styrene, a salt of an .alpha.,.beta.-unsaturated monocarboxylic or polycarboxylic acid containing a primary, secondary or tertiary monoamine or polyamine and optionally copolymerizable compounds with a polyether polyol.

Abstract: A method for the continuous production of foam blocks or foam sandwich panels involving the application of the liquid foamable reaction mixture to the continuously moving shaping support in a manner which avoids large gas inclusions in the final product produced. The liquid foamable reaction mixture is preliminarily distributed by the use of a particular distributor channel means in a traverse direction to the continuously moving shaping support, permitted to flow in the form of a descending film exposed to the atmosphere to an intermediate storage means and then conveyed to said continuously moving shaping support. The distributor channel means may also be pivoted to control the outflow of the mixture.

Abstract: The instant invention relates to a process and an apparatus for applying a layer of liquid, foamable reaction mixture to a continuously moving support, such as for the production of foam blocks or foam sandwich panels having a thick foam core.