JPS51106124

Stable concentrated solutions of basic dyestuffs of the formula wherein R denotes the remaining part of a 5- or 6-membered heterocyclic ring, R1 denotes optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl, R3 denotes alkyl and A denotes an aromatic or heterocyclic radical are prepared...

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Bibliographische Detailangaben
1. Verfasser:	RODERITSUHI RAUE
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES
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Beschreibung
Zusammenfassung:	Stable concentrated solutions of basic dyestuffs of the formula wherein R denotes the remaining part of a 5- or 6-membered heterocyclic ring, R1 denotes optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl, R3 denotes alkyl and A denotes an aromatic or heterocyclic radical are prepared by reacting bases of the formula with dialkyl sulphates of the formula (R3-O-)2SO2 in organic solvents which are completely or partially miscible with water and which do not react with the dialkyl sulphates or react with these more slowly than the dye bases.