POLYURETHANES HAVING REDUCED ALDEHYDE EMISSION

摘要

The present invention relates to a process for the production of polyurethanes where (a) polyisocyanate, (b) polymeric compounds having groups reactive toward isocyanates, (c) catalysts, (d) a CH-acidic compound of the general formula R1—CH2—R2, where R1 and R2 independently of one another are an electron-withdrawing moiety of the general formula —C(O)—R3 or —CN, where the moiety R3 is selected from the group consisting of —NH2, —NH—R4—NR5R6, OR7 or R8, where R4, R5, R6, R7, and R8 are independently selected from the group consisting of aliphatic, araliphatic or aromatic hydrocarbons, which may have substitution, and optionally (e) blowing agent, (f) chain extender and/or crosslinking agent, and (g) auxiliaries and/or additives are mixed to give a reaction mixture, and the reaction mixture is allowed to complete a reaction to give the polyurethane. The present invention further relates to polyurethanes produced by this process and to the use of these polyurethanes in the interior of means of transport.

主权项

1. A process for producing a polyurethane, the process comprising:
mixing (a) polyisocyanate, (b) polymeric compounds having groups reactive toward isocyanates, (c) catalysts, comprising incorporable amine catalysts, (d) a CH-acidic compound of the general formula
R1—CH2—R2,where R1 and R2 independently of one another are an electron-withdrawing moiety of the general formula —C(O)—R3 or —CN, where the moiety R3 is selected from the group consisting of —NH2, —NH—R4—NR5R6, OR7 and R8, where R4, R5, R6, R7, and R8 independently are selected from the group consisting of an aliphatic hydrocarbon, an araliphatic hydrocarbon, and an aromatic hydrocarbon, which optionally have substitution, and optionally (e) a blowing agent, (f) a chain extender and/or a crosslinking agent, and (g) auxiliaries and/or additives to give a reaction mixture, and reacting the reaction mixture to give the polyurethane, wherein the compound R1—CH2—R2 comprises one or more isocyanate-reactive groups, or a molecular weight of the CH-acidic compound (d) is greater than 250 g/mol.