PRODUCTION OF PERYLENE-3, 4, 9, 10-TETRACARBOXYLIC ACID-N, N'-DIMETHYLIMIDE IN HIGH HIDING POWER PIGMENT FORM

Title:

PRODUCTION OF PERYLENE-3, 4, 9, 10-TETRACARBOXYLIC ACID-N, N'-DIMETHYLIMIDE IN HIGH HIDING POWER PIGMENT FORM

Document Type and Number:

Japanese Patent JPS6215262

Kind Code:

A

Abstract:

A process for the preparation of perylene-3,4,9,10-tetracarboxylic acid N,N'-dimethylimide in a high-hiding pigmentary form and a pure red shade, in which a finely divided, dry perylene-3,4,9,10-tetracarboxylic acid, N,N'-dimethylimide prepigment which is prepared in a conventional manner and has a crystallite size of <400 ANGSTROM is treated with an organic solvent which is liquid in the treatment temperature range stated below and is selected from the series comprising saturated aliphatic brominated or chlorinated hydrocarbons, aromatic hydrocarbons and aromatic brominated or chlorinated hydrocarbons, in a mill or a disperser at temperatures from 0 DEG C. to 100 DEG C., the organic solvent is then distilled off and the perylene-3,4,9,10-tetracarboxylic acid N,N'-dimethylimide pigment is isolated.

Inventors:

ERUNSUTO SHIYUPIICHIYUKA
MANFUREETO URUBAN

Application Number:

JP15989086A

Publication Date:

January 23, 1987

Filing Date:

July 09, 1986

Export Citation:

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Assignee:

HOECHST AG

International Classes:

C09B67/04; C09B5/62; C09B67/10; (IPC1-7): C09B67/04

Attorney, Agent or Firm:

Ezaki Mitsuyoshi

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