Diazo recording

Abstract

Abstract A DRY OR WET DIAZO PROCESS GIVING DEEP COLORED TONES USING AS THE COUPLING AGENT A BENZOTHIAZOLIUM COMPOUND CORRESPONDING TO THE FOLLOWING GENERAL FORMULA: 2-CH3,3-R,5-R1,6-R2,7-R3-BENZOTHIAZOLIUM X(-) WHEREIN: X- STANTS FOR AN ANION, AND MAY BE MISSING WHEN THE ANION IS PRESENT IN THE R GROUP, R STANDS FOR AN ORGANIC GROUP INTRODUCED BY QUATERNIZATION, R1 STANDS FOR HYDROGEN, AND ALKYL GROUP, A PHENYL GROUP, AN ALKOXY GROUP, A HALOGN ATOM, AND AMINO GROUP, CYANO, AN ALKOXYCARBONYL GROUP, AN ACYL GROUP, OR AN ALKYLSULPHONYL GROUP, R2 STANDS FOR HYDROGEN, A C2-C5 ALKYL GROUP, AN ALKOXY GROUP, CYANO, CYANOVINYL OR A HALOGEN ATOM, R3 STANDS FO HYDROGEN, HALOGEN, A SULPHO GROUP OR A SULPHAMYL GROUP, THE BENZENE RING OF THE BENZOTHIAZOLIUM NUCLIUS CARRYING AT LEAST ONE SUBSTITUENT OTHER THAN HYDROGEN AND BEING FREE OF A METHOXY GROUP IN THE 6-POSITION; AND RECORDING MATERIALS USEFUL THEREIN. A PREFERRED BENZOTHIAZOLIUM COMPOUND IS 2,3,5,6-TETRAMETHYL-BENCOTHIAZOLIUM METHYLSULPHATE AND A PREFERRED DIAZONIUM COMPOUND P-DIETHYLANINOBENZENE-DIAZONIUM TETRABOROFLUORIDE.

Inventors

• 👤 Albert Lucien Poot
• 👤 Henri Depoorter

Bibliographic Details