http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-189782-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_27bc75e6a1a7ed5caf6bfed0891e5baf |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B7-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B7-00 |
| filingDate | 1922-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1923-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-189782-A |
| titleOfInvention | Manufacture of indigoid dyestuffs |
| abstract | Thioindigoid dyes which dye animal and vegetable fibres in the vat, are obtained by condensing b -thionaphthisatin (Specification 186,859 with a cyclic compound having a methylene group capable of reaction, for instance, indoxyl, thioindoxyl, pyrazolone, acenaphthenone, a -oxyanthracene, a -naphthol or a substitution product or derivative thereof, and in some cases halogenizing the products. The following examples are given:-(1) A product dyeing wool red and cotton bordeaux tints is obtained by condensing b -thionaphthisatin with oxythionaphthene in cold sulphuric acid, diluting with glacial acetic acid and pouring on to ice; by brominating the product a bluer dyestuff is obtained; by replacing the oxythionaphthene, by 6-chloro-oxythionaphthene, indoxyl, phenyl-methyl-pyrazolone, acenaphthenone, a -naphthol, or a -oxyanthracene, violet, grey, and brown vat-dyestuffs are obtained: (2) a product dyeing wool and cotton red-brown or yellow-brown shades is obtained by boiling b -thionaphthisatin with 6-aminothioindoxylcarboxylic acid in alcoholic solution to which some ammonia or dimethylaniline may be added; the product when brominated dyes similar shades but faster to chlorine; (3) b -thionaphthisatin is condensed with acenaphthenone in chlorobenzene in presence of zinc chloride to yield a dyestuff dying cotton brown shades. The Specification as open to inspection under Sect. 91 (3) (a) refers specifically to the condensation of chlorinated a -naphthols and dioxynaphthalenes with b -thionaphthisatin; this subject-matter does not appear in the Specification as accepted. |
| priorityDate | 1921-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.