C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 487/04 (2006.01) C09B 57/12 (2006.01) C09K 11/06 (2006.01)
Patent
CA 2041887
P-18066/A/CGC 1484 FLUORESCENT YELLOW 1,2,3,4-TETRACHLORO-1H-ISOINDOLO-[2.1-a]- BENZIMIDAZOL-11-ONE PIGMENTS Abstract of the disclosure Fluorescent yellow pigments comprising 1,2,3,4-tetrachloro-11H-isoindolo-[2,1-a]- benzimidazol-11-one and various derivatives thereof; the use of said pigments in a variety of substrates such as alkyds, enamels, inks and the like; a process for the preparation thereof involving the condensation of the appropriate o-phenylenediamine and tetrachlorophthalic anhydride; and the aforementioned novel derivatives of said compound.
Ag Ciba-Geigy
Fetherstonhaugh & Co.
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