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Bayer AG
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Bayer AG
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Publication of ES275251A1publicationCriticalpatent/ES275251A1/en
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur
(AREA)
Heat Sensitive Colour Forming Recording
(AREA)
Abstract
Process for obtaining dyes, characterized in that at least one grouping of the formula is introduced in the colorants or previous dye products. ** (See formula) ** where Y is by O, S or NH, R by hydrogen or a substituent and X means the remainder of an aromatic, hydroaromatic or aliphatic carbonic acid and, if previous dye products are used, they are transformed into the desired final dyes . (Machine-translation by Google Translate, not legally binding)
ES0275251A1961-03-071962-03-07Procedure for obtaining colorants (Machine-translation by Google Translate, not legally binding)
ExpiredES275251A1
(en)
Procedure for the manufacture of new colorants of the anthraquinºnica, peridicarboxilimida and ftalocianºnica series (Machine-translation by Google Translate, not legally binding)