Production of polyurethane systems

1. A process for production of polyurethane systems comprising;

reacting a polyol component and optionally water with an isocyanate component in the presence of one or more catalysts for reaction of the isocyanate component and the polyol component, for reaction of the isocyanate component and water, and/or

trimerization of the isocyanate component,

wherein said reacting is carried out in the presence of a mass fraction of in total from 0.01 to 10 parts by weight of a carrier material and a polyamine P based on 100 parts by weight of the polyol component, wherein the polyamine P is a reaction product of an unsaturated nitrile and an aliphatic polyamine selected from the group consisting of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine and hexamethylenediamine.

2. The process according to claim 1 , wherein the carrier material used is fumed silica or precipitated silica.

3. The process according to claim 1 , wherein the polyamine P used is the reaction product of an unsaturated nitrile and an aliphatic polyamine selected from triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine and hexamethylenediamine.

4. The process according to claim 1 , wherein the carrier material is provided in an amount of 0.001 wt % to 5 wt % and the polyamine P is provided in an amount of between 0.1 wt % and 9.999 wt % based on the polyol component.

5. The process according to claim 1 , wherein the polyamine P and the carrier material are added separately from one another to the reaction mixture which serves to produce the polyurethane system, the carrier material having been dispersed in a liquid, and

wherein the polyurethane systems produced comprise from 0.1 to 3 wt % of a total amount of a carrier material and polyamine P.

6. The process according to claim 1 , wherein the polyurethane system produced is a polyurethane foam, and

the polyamine P and the carrier material are mixed with one another and then added to the reaction mixture which serves to produce the polyurethane system.

7. A polyurethane foam system, obtained by a process according to claim 1 .

8. The polyurethane foam system according to claim 7 , wherein the polyurethane foam system is a flexible polyurethane foam, a viscoelastic PU foam, an HR polyurethane foam, a semi-rigid polyurethane foam, a thermoformable polyurethane foam or an integral PU foam.

9. An article selected from the group consisting of refrigerator insulation, an insulation panel, a sandwich element, pipe insulation, spray foam, 1-component can foam, 1.5-component can foam, a wood imitation article, modelling foam, packaging foam, a mattress, furniture cushioning, automotive seat cushioning, a headrest, a dashboard, an automotive interior, an automotive roof liner, a sound absorption material, a steering wheel, a shoe sole, carpet backing foam, filter foam, a sealing foam, an adhesive, and a coating comprising the polyurethane foam system according to claim 7 .

10. A process for reducing aldehyde emission from polyurethane systems comprising admixing to the polyurethane systems a carrier material and a polyamine P wherein the polyamine P is a reaction product of an unsaturated nitrile and an aliphatic polyamine selected from the group consisting of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine and hexamethylenediamine, in an amount of from 0.001 to 10 wt %, based on the overall weight of the polyurethane system, wherein the admixing takes place before and/or during the production of the polyurethane system.

11. A process for reducing aldehyde emission comprising formaldehyde, acetaldehyde, acrolein and benzaldehyde, from polyurethane foam systems comprising admixing to the polyurethane foam systems a carrier material and a polyamine P wherein the polyamine P is a reaction product of an unsaturated nitrile and an aliphatic polyamine selected from the group consisting of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine and hexamethylenediamine, in an amount of from 0.01 to 5 wt %, based on the overall weight of the polyurethane foam system, wherein the admixing may take place before and/or during the production of the polyurethane foam system.