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Bayer AG
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Bayer AG
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Application filed by Bayer AGfiledCriticalBayer AG
Priority to ES0240779ApriorityCriticalpatent/ES240779A1/en
Publication of ES240779A1publicationCriticalpatent/ES240779A1/en
Process for obtaining dyes, characterized in that the compounds, which in one of their tautomeric forms can be referred to as 1-amino-3-imi-4,7-dithia-4,5,6,7-tetrahydroisoindolenines, in in the given case, if appropriate in a mixture with other 3,4-disubstituted 2-amino-5-imino-pyrrolenins or other cyclic bisamidines, suitable for the preparation of tetraazaporphines and hemiporphirazines, in substance or on a substrate, optionally presence of heavy metals or heavy metal compounds and preferably in the presence of slightly reducing organic solvents, are subjected to a heat treatment. (Machine-translation by Google Translate, not legally binding)
ES0240779A1958-03-171958-03-17Procedure for obtaining colorants (Machine-translation by Google Translate, not legally binding)
ExpiredES240779A1
(en)
Procedure for the preparation of a copper ftalocianin, whose alpha form is stable in high degree to the solvents (Machine-translation by Google Translate, not legally binding)
Process for preparing a chemical composition comprising a complex consisting of 5-nitro-2-furaldehido and 2-oxazolidona (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of new colorants of the peridicarboxylic acid imidas series. (Machine-translation by Google Translate, not legally binding)