http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-391987-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B31-061 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B31-06 |
| filingDate | 1932-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1933-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-391987-A |
| titleOfInvention | Improvements in the dyeing of cellulose esters and ethers |
| abstract | Cellulose esters or ethers, dyeing; azo dyes; azo dyes, forming on the material.--Fast green dyeings are obtained upon cellulose ester or ether materials by treatment with a water-insoluble p-aminoazo dyestuff, free from sulphonic or carboxylic acid groups of the general formula <FORM:0391987/IV/1> in which R is an alkoxy-substituted benzene nucleus, and either R1 is a benzene nucleus in which case the Y's are aliphatic, hydroaromatic or aliphatic-aromatic groups, or the Y's and the adjacent N atom form a closed ring, or R, is a tetrahydronaphthalene nucleus, in which case the Y's are hydrogen or aliphatic groups, followed by diazotization on the fibre and development with a coupling component of the type: <FORM:0391987/IV/2> in which X is alkyl or alkoxy. The following examples are specified: (1) Acetate silk is treated in a bath, heated for \ba3/4\be hour to 70-75 DEG C containing the dyestuff 4-nitro-3-methoxyaniline --> dimethylaniline (nitro group reduced) and hydrochloric acid, advantageously with an addition of sodium acetate after handling the goods in the bath for \ba1/4\be hour, rinsed, subjected to diazotization on the fibre, and developed for 1 hour at 75 DEG C. in a weak acetic acid bath containing 6-methoxy-2 : 3-oxynaphthoic acid; alternatively the azo dye may be used in the form of a suspension or a soap bath emulsion or other dispersion. (2) . . (7) Acetate silk is similarly dyed with 4-nitro-2 : 5-dimethoxyaniline --> diethylaniline, tetrahydro - 1 - naphthylamine or tetrahydro-1-dimethylaminonaphthalene (nitro group reduced) --> (on the fibre) 6-methoxy-2 : 3-oxynaphthoic acid; 4-nitro-3-methoxyaniline --> dimethylaniline (nitro group reduced) --> (on the fibre) 6 - methyl - 2 : 3 - oxynaphthoic acid; 4-nitro-2 : 5 - dimethoxyaniline --> tetrahydro - 1 - naphthylamine (nitro group reduced) --> (on the fibre) 6-methyl-2 : 3-oxynaphthoic acid; 4 - nitro - 2 - methoxyaniline --> tetrahydro - 1 - naphthylamine (nitro group reduced) --> (on the fibre) 6-methoxy-2 : 3-oxynaphthoic acid. Other specified azo dyes are those obtainable by reduction of the nitro group of 4-nitro-2-methoxyaniline --> dimethylaniline; 4-nitro-3 - methoxyaniline --> N - methylcyclohexyl - aniline or N-dimethyl (or diethyl)-m-toluidine; 4 - nitro - 2 : 5 - dimethoxyaniline --> di-(n-butyl) aniline, N-phenylmorpholine, N-dimethyl - m - chloraniline or dibenzylaniline. Specification 330,591, [Class 2 (iii), Dyes &c.], is referred to. The Specification as open to inspection under Sect. 91 comprises also the use of 2 : 3-oxyanthracenecarboxylic acid for development on the fibre. This subject-matter does not appear in the Specification as accepted. 6 - Methyl - 2 : 3 - oxynaphthoic acid is obtained by treating the dry sodium salt of 6 - methyl - 2 - naphthol with carbon dioxide at 250 DEG C. under 50 atmospheres pressure. N-Methylcyclohexylaniline is obtained by methylation of N-cyclohexylaniline. |
| priorityDate | 1931-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 55.