Patent number: 6723846
Abstract: The present invention relates to compounds having formula (1): wherein each R1 represents, independently, a linear C1-C4-alkylene residue which is unsubstituted or substituted by hydroxy, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-hydroxy- or alkoxy-alkoxy, —OCOM, —OCOC1-C4-alkyl, or an amino acid residue from which a hydrogen atom on the amino group has been removed; each R2 represents, independently, a linear C1-C4-alkylene residue which is unsubstituted or substituted by hydroxy, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-hydroxy- or alkoxy-alkoxy, —OCOM, —OCOC1-C4-alkyl, —CO2M, CO2C1-C4-alkyl SO3M or phenoxy which is unsubstituted or substituted by halogen, C1-C4-alkyl or C1-C4-alkoxy, —CO2M or CO2C1-C4-alkyl, NH3 or mono- or disubstituted amino; or phenyl which is unsubstituted or substituted by 1 to 3 SO3M, SO2NHC1-C4-alkyl, —SO2NH2, —CO2M, —CO2M, —CO2C1-C4-alkyl, —CONH2, —CONHC1-C4-alkyl, —NHCOC1-C4-alkyl or mono- or disubstituted amino groups;
Type:
Grant
Filed:
March 6, 2002
Date of Patent:
April 20, 2004
Assignee:
Ciba Specialty Chemicals Corporation
Inventors:
Georges Metzger, Serge Hauger, Fabienne Cuesta, Christophe Bulliard, Peter Rohringer, Marc Roger Grienenberger
