http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-676647-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dc2f7134efa50484bb359fda73782848 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P1-6735 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P1-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P1-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P3-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P1-642 |
| filingDate | 1949-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1952-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-676647-A |
| titleOfInvention | Improvements relating to dyeing with complex copper compounds |
| abstract | Dyebaths are prepared by dissolving in water a metal-free dyestuff that dyes cellulosic material and forms a difficultly soluble copper compound, adding thereto excess of ammonia or an aliphatic base and, at the same time or subsequently, such a copper compound as contains the copper in complex form in the anion or else a copper salt together with a complex former capable of binding the copper in the anion. Preferred dyestuffs are those which contain at least two azo groups and at least once the grouping <FORM:0676647/IV (c)/1> where X is hydroxyl or carboxyl, particularly in the form <FORM:0676647/IV (c)/2> where Y is an azo, azoxy or urea group or a direct linkage. Alternatively there may be used derivatives of 4 : 41-bis-(411-arylazo-pyrazonyl-111)-diphenyl or -stilbene. Suitable dyestuffs are listed. The aliphatic base is preferably such as cannot be removed with steam and may be an aliphatic amine or a morpholine base, suitable compounds being mentioned (especially monoethanolamine and ethylene diamine). The complexing agent for the copper is preferably an aliphatic hydroxycarboxylic or aminocarboxylic acid, e.g. glycine, alanine, or glycollic, lactic, hydracrylic, tartaric, citric or b -hydroxybutyric acid. The dyebaths so obtained may be used for dyeing materials that do not require acid conditions, e.g. linen, cotton and regenerated cellulose; normal methods are applicable. Examples are given of the preparation of dyebaths and the dyeing of cotton therewith. The dyeing may be after-treated with the condensation product of dicyandiamidine and formaldehyde. Specification 455,274 is referred to. According to the Specification as open to inspection under Sect. 91, the copper need not be in complex form in the dyebath but in this case there is preferably added a dispersing agent, the use of sodium N-methyl-m -heptadecyl-benzimidazole sulphonate being exemplified. Also, the organic base need not be aliphatic and the components of the dyebath need not be added in the above order. This subject-matter does not appear in the Specification as accepted. Specification 458,501 also is referred to. |
| priorityDate | 1948-10-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 61.