Montedison S.p.a.

Montedison Fibre S.p.a.

Giampiero Pieri

Camillo Paffoni

Filippo M Carlini

Gioacchino Boffa

Roberto Cipolli

The known compounds of the formula: ##STR1## wherein X is hydrogen or bromine, Y is hydrogen, chlorine, bromine or methyl and the -COOH group is meta or para to the azo group have been found to be useful in uniformly dyeing polyamide fibers to a yellow shade.

Acid dyes useful for dyeing streaked nylon

A plastosoluble fluorescent organic dye is disclosed that is derived from benzanthrone, and having the general formula: ##STR1## wherein X = --H or --Br; and Y = --H, --OCH.sub.3 or --OC.sub.2 H.sub.5. A process for the preparation of a dye of the general formula (I) is also disclosed. These dyes are useful in the bulk dyeing of polystyrene, polymethylmethacrylate, rigid PVC, polyethylene, acrylonitrile/butadiene/styrene copolymers, polycarbonates or mineral oils.

Fluorescent benzanthronic dyes

A fluorescent azabenzanthronic dye is disclosed having the general formula (I): ##STR1## wherein X = --NH-- or --S--; and Y = --OCH.sub.3 or --OC.sub.2 H.sub.5. A process for the preparation of a dye of the general formula (I) is also disclosed. These dyes are useful in the bulk dyeing of polystyrene, polymethylmethacrylate, rigid PVC, polyethylene, acrylonitrile/butadiene/styrene copolymers, polycarbonates or mineral oils.

Growing community of inventors

Saronno (Varese), Italy

Giampiero Pieri