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US 6,855,739 B2Granted
Modified polyurethane foamed materials used as adsorbents
AssigneeBASF SE
InventorsArmin Becker, Bernd Bruchmann, Andreas Arlt, Ulrich Treuling, Rainer Rahm, Jürgen Decker, Ulrich Steuerle, Martin Kreyenschmidt, Willi Riegel, Werner Bertleff
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Abstract
The invention relates to polyurethane foams comprising (i) ethylenimine, polyethylenimine, polyvinylamine, polyvinylamine copolymers, carboxymethylated polyethylenimines, phosphonomethylated polyethylenimines, quarternized polyethylenimines and/or dithiocarbamatized polyethylenimines or (ii) alkali hydroxides and/or alkaline earth metal hydroxides or a mixture consisting of both (i) and (ii).
Claims7
A process, comprising:
- preparing a polyurethane foam by:
- reacting one or more polyisocyanates with one or more compounds having at least two hydrogen atoms which are reactive toward isocyanates, thereby preparing a polyurethane foam and then applying:
- (i) ethylenimine, polyethylenimine, polyvinylamine, polyvinylamine copolymers, carboxymethylated polyethylenimines, phosphonomethylated polyethyleneimines, quaternized polyethylenimines, dithiocarbamatized polyethylenimines or a mixture thereof,
- (ii) alkali metal hydroxides, alkaline earth metal hydroxides, or a mixture thereof, or
- (iii) a mixture of (i) and (ii), to the surface of a polyurethane foam.
2 more elements
Dependencies are inferred from the claim text.