Production of polyurethane foams
AssigneeBayer MaterialScience AG
InventorsJan Schönberger, Michael Mager, Thorsten Rische, Sebastian Dörr, Thomas Feller, Michael Heckes, Melita Dietze, Burkhard Fugmann
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Abstract
The invention relates to a process for producing polyurethane foams, by frothing and drying mixtures of specific polyurethane dispersions and crosslinkers.
Claims19
A process for producing foamed articles comprising frothing and drying a composition comprising aqueous polyurethane dispersions (I) anionically hydrophilicized by means of sulphonate groups and a crosslinker (II) wherein at least partial chemical crosslinking occurs during frothing and/or drying, and wherein said crosslinkers (II) are selected from the group consisting of unblocked, optionally hydrophilicized polyisocyanates;
- amide- and amine-formaldehyde resins;
- phenolic resins;
- aldehyde and ketone resins;
- resols;
- furan resins;
- urea resins;
- carbamidic ester resins;
- triazine resins;
- melamine resins;
- benzoguanamine resins;
- cyanamide resins;
- and aniline resins.
Dependencies are inferred from the claim text.