APPLICATION OF DISULPHONIC FLUORESCENT BLEACHING AGENTS IN COATINGS Russian patent published in 2015 - IPC D21H21/30 C07D251/68 

FIELD: chemistry.

SUBSTANCE: invention relates to disulphonic fluorescent bleaching agents for a coating composition for obtaining a coated paper. Described is the application of the disulphonic fluorescent bleaching agent derivative of bis-triazinylaminostilbenes, containing in aniline rings the group -COOM in a para- and/or ortho-position to an aminogroup, where M is hydrogen, Li, Na, K, Ca, Mg, ammonium or ammonium, which is mono-, di-, tri- or tetrasubstituted with C₁-C₄-alkyl or C₂-C₄-hydroxyalkyl, for the clarification of the coating compositions. The coating composition includes a white pigment, a synthetic binding agent, a synthetic cobinding agent, different from the synthetic binding agent, and the said fluorescent bleaching agent. The method of the coating composition clarification, its application for manufacturing the coated paper and the obtained paper are described.

EFFECT: claimed coating composition provides an increased efficiency of paper bleaching.

25 cl, 4 dwg, 4 tbl, 4 ex