http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-705332-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9735ac84d1327c18b201eb1faed4fa0f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P1-6426 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P1-221 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06P1-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06P1-642 |
| filingDate | 1951-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_042a4dec87ab01e678a50fca8f75833b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7bc36e9cf2db3eaebc1869f65356cde http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_013f02461cb28c16c24b2720b3093ae9 |
| publicationDate | 1954-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-705332-A |
| titleOfInvention | Improvements in and relating to colouration by vat dyestuffs |
| abstract | Cellulose acetate is dyed in an aqueous dyebath under non-swelling conditions with certain vat dyestuffs which have been reduced under non-alkaline conditions in the presence of pyridine, the amount of pyridine being such that the swelling of the cellulose acetate is only substantially the same as the swelling in water alone. The vat dyestuffs used are indigo and thioindigo and their derivatives, halogenated indirubines, dinaphthindigoid compounds, acyl aminoanthraquinones, pyranthrones, benzanthrones, anthraquinonyl amines, and carbazoles containing more than one anthraquinone nucleus, but dyestuffs containing a single anthraquinone nucleus linked at two adjacent carbon atoms to a second cyclic residue through a heterocyclic grouping are excluded. It is preferred to prepare the reduced vat in concentrated form and to add this to the dyebath, and if the acidity normally developed during dyeing becomes considerable, a weak alkali such as ammonia may be added to bring the bath nearer to neutrality. In examples, (1) Durindone Blue 4BCS is reduced with sodium hydrosulphite while adding pyridine, and the concentrated vat is added to a dyebath and used for dyeing cellulose acetate fabric, the dye being subsequently developed on the fabric by means of a solution of sodium perborate; (2) cellulose acetate fabric is dyed in a bath made from a vat concentrate made by mixing Caledon Golden Yellow GKS, water, sodium hydrosulphite and pyridine, and is finally developed by means of a solution of sodium perborate. Specification 320,978, [Class 15(2)], is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1734172-A3 |
| priorityDate | 1951-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.