| 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, Willy van Pee +4 more |
2001-05-08 |
| 5654479 |
4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation |
Friedhelm Lehrich, Bernd Bruchmann, Helmut Tesch, Roland Minges, Johann Swoboda +3 more |
1997-08-05 |
| 5621138 |
4-substituted bis (2,6-diisopropylphenyl)- carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation |
Friedhelm Lehrich, Bernd Bruchmann, Helmut Tesch, Roland Minges, Johann Swoboda +3 more |
1997-04-15 |
| 5597942 |
Carbodiimides and/or oligomeric polycarbodiimides based on 1 3-bis (1-methyl-1-isocyanatoethyl) benzene their use as hydrolysis stabilizers |
Friedhelm Lehrich, Manfred Genz, Bernd Bruchmann, Helmut Tesch, Roland Minges +1 more |
1997-01-28 |
| 5532414 |
4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation |
Friedhelm Lehrich, Bernd Bruchmann, Helmut Tesch, Roland Minges, Johann Swoboda +3 more |
1996-07-02 |
| 5504241 |
Carbodiimides and/or oligomeric polycarbodiimides based on 1,3-bis(1-methyl-1-isocyanatoethyl)benzene, their preparation, and their use as hydrolysis stabilizers |
Friedhelm Lehrich, Manfred Genz, Bernd Bruchmann, Helmut Tesch, Roland Minges +1 more |
1996-04-02 |
| 5498747 |
Carbodiimides and/or oligomeric polycarbodiimides based on 1,3-bis (1-methyl-1-isocyanatoethyl)benzene, their preparation, and their use as hydrolysis stabilizers |
Friedhelm Lehrich, Manfred Genz, Bernd Bruchmann, Helmut Tesch, Roland Minges +1 more |
1996-03-12 |
