| 6576788 |
METHOD FOR PRODUCING MIXTURES CONSISTING OF DIPHENYLMETHANE DIISOCYANATES AND POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATES CONTAINING A REDUCED AMOUNT OF CHLORINATED SECONDARY PRODUCTS AND WITH A REDUCED IODINE COLOR INDEX |
Ulrich Penzel, Volker Scharr, Dieter Starosta, Hilmar Boesel, Eckhard Ströfer +8 more |
2003-06-10 |
| 6229043 |
Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content |
Dietrich Scherzer, Bernd Bruchmann, Roland Minges, Peter Keller, Wolfgang Heider +4 more |
2001-05-08 |
| 5207942 |
Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number |
Dietrich Scherzer, Roland Minges, Werner Langer, Bernd Bruchmann, Wolfgang Heider +2 more |
1993-05-04 |
| 5208368 |
Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates of reduced iodine color number |
Dietrich Scherzer, Roland Minges, Bernd Bruchmann, Wolfgang Heider, Peter Keller |
1993-05-04 |
| 4294666 |
Process for the manufacture of 4,4'-diphenyl-methane diisocyanate and a mixture of diphenyl-methane diisocyanate isomers containing a small amount of uretdiones and hydrolyzable chlorine |
Hans J. Astheimer, Horst Brandtstaedter, Rainer Ohlinger, Jaak Van Steen, Friedrich Sauer +2 more |
1981-10-13 |
