| abstract |
DIFFICULTY WATER-SOLUBLE ANTHRAQUINONE DYESTUFFS FREE FROM WATER-SOLUBILIZING GROUPS WHICH DISSOCIATE ACID IN WATER BEARING IN AT LEAST ONE B-POSITION, EITHER DIRECTLY OR BY WAY OF A BRIDGING MEMBER, THE GROUPING -Y-O-COOR, WHEREIN Y REPRESENTS AN ALKYLENE GROUP, OPTIONALLY SUBSTITUTED BY A HYDROXYL GROUP AND R REPRESENTS AN OPTIONALLY SUBSTITUTED ALIPHATIC, CYCLOALIPHATIC OR AROMATIC RADICAL; THESE DYESTUFFS BEING SUITED PARTICULARLY FOR THE DYEING OF OF SYNTHETIC ORGANIC FIBERS, ESPECIALLY POLYETHYLENE GLYCOL TEREPHTHALATE FIBERS, AFFORDING DYEEINGS ON THESE FIBERS WHICH HAVE GOOD FASTNESS PROPERTIES AND ESPECIALLY GOOD FASTNESS TO LIGHT AND SUBLIMATION. |