.beta.-Crystalline form of the pigment obtained by coupling diaz

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal


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260208, 106288Q, C09B 4300, C09B 4312




The disazo pigment of the formula ##STR1## in the .beta.-modification thereof, whose X-ray diffraction pattern at an interplanar spacing of 3.33 A.degree. shows a line of very strong intensity, at 5.38 and 8.33 A.degree. lines of strong intensity, at 3.74, 4.24, 4.68, 4.94, 5.18 and 8.70 A.degree. lines of medium intensity, at 4.05, 4.37, 6.33 and 12.6 A.degree. lines of medium to faint intensity, at 3.50, 3.49, 5.65, 6.09, 6.71, 10.6 and 11.5 A.degree. lines of faint intensity.
The .beta.-modified pigment is a brilliant yellowish red color and may be used to color high molecular weight organic materials such as polycarbonates, polyvinyl chloride and polypropylene.

patent: 2741658 (1956-04-01), Schmid et al.
patent: 2741659 (1956-04-01), Schmid et al.
patent: 2774755 (1956-12-01), Schmid et al.
patent: 2888453 (1959-05-01), Schmid et al.
patent: 3197457 (1965-07-01), Schetty et al.
patent: 3321458 (1967-05-01), Lohe et al.
patent: 3325470 (1967-06-01), Ribka
patent: 3555004 (1971-01-01), Mueller
patent: 3562249 (1971-02-01), Schnabel et al.
patent: 3642768 (1972-02-01), Ribka


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