Use of the alpha-modification of cis-naphthoylenebis(benzimidazo

Details Use of the alpha-modification of cis-naphthoylenebis(benzimidazo Use of the alpha-modification of cis-naphthoylenebis(benzimidazo

1988-10-06

1990-07-03

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524487, 524528, 524570, 524583, 524585, C08J 322, C08K 534, C08L 2302

Patent

active

049391933

ABSTRACT:
The .alpha.-modification of cis-naphthoylenebis(benzimidazole) is unstable in many media and up to date has therefore only been used as a vat dye. However, according to the invention, the .alpha.-modification can readily be used for pigmenting in the mass polyolefins such as polyethylene, polypropylene or analogous copolymers. During pigmenting, the pigment which is prepared in a conventional manner, is stable in that modification and produces strong red dyeings.

REFERENCES:
patent: 3772303 (1973-11-01), Spietschka et al.
patent: 3865829 (1975-02-01), Wagner
patent: 4181805 (1980-01-01), Landler
Grant Hackh's Chemical Dictionary, 4th Edition, pp. 27 and 472, McGraw-Hill, NY, 1972.

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