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Method for the secondary crosslinking of hydrogels with bicyclic amide acetals |
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Postcrosslinking of water absorbing polymers with cyclic carbamates and/or cyclic ureas |
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| 7626058 |
Processes for producing ethylene amines |
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| 7547807 |
Method for producing phosphonium salts |
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2009-06-16 |
| 7253316 |
Flexible method for the joint production of (i) formic acid, (ii) a carboxylic acid comprising at least two carbon atoms and/or the derivatives thereof, and (iii) a carboxylic acid anhydride |
Jörg Pastre, Wolfram Stuer, Elke Geissler, Otto Machhammer |
2007-08-07 |
| 7183360 |
Method for crosslinking hydrogels with morpholine-2,3-diones |
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2007-02-27 |
| 6989454 |
Method for producing maleic anhydride |
Hartmut Hibst, Ralf Noe, Mark Duda |
2006-01-24 |
