Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3588246A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Imperial Chemical Industries LtdfiledCriticalImperial Chemical Industries Ltd
Priority to GB3588246ApriorityCriticalpatent/GB619357A/en
Publication of GB619357ApublicationCriticalpatent/GB619357A/en
C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
C09B7/00—Indigoid dyes
C09B7/06—Indone-thionapthene indigos
Landscapes
Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Indole Compounds
(AREA)
Abstract
A brown dye stated to be 4.7-dichloro-(2 : 1)-naphthindole - 2 : 21 - (2 : 1) - naphthathionaphthene indigo is made by heating 4.7-dichloro(2 : 1)-naphthathioindoxyl in presence of a nitrogenous base, e.g. piperidine. A solvent such as chlorobenzene may be employed. An example is given.
GB3588246A1946-12-041946-12-04A new thioindigoid dyestuff
ExpiredGB619357A
(en)