Publication number: 20050203221
Abstract: The present invention relates to novel whitening pigments comprising the reaction product of (a) a melamine-formaldehyde and/or a melamine-urea polycondensation product and (b) a water-soluble fluorescent whitening agent of the formula (1) wherein R1 represents —OH, —OC1-C4alkyl, —Oaryl, —NH2, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —NHC2-C4hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4hydroxyalkyl), —NHC1-C4alkoxy-C1-C4alkyl, —N(C1-C4alkoxy-C1-C4alkyl)2, morpholino, piperidino, pyrrolidino or the residue of an amino acid from which a hydrogen atom has been abstracted from the amino group, R2 represents —CONH2, —CONHC1-C4alkyl, —COOM, —SO2NH2 or —SO2NHC1-C4alkyl and M is hydrogen, sodium, potassium, calcium, magnesium, ammonium, mono-di-, tri- or tetra-substituted C1-C4alkylammonium or C2-C4hydroxyalkylammonium or mixtures thereof, a process for preparation of the whitening pigments and their use for the fluorescent whitening of paper, especially in coating, for the fluorescent whitening and improvement o
Type:
Application
Filed:
June 3, 2003
Publication date:
September 15, 2005
Inventors:
Fabienne Cuesta, Roland Naef, Ted Deisenroth, Peter Rohringer, Marc Grienenberger, Serge Schroeder