http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-441389-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/C09B23-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B11-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B11-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-105 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-145 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-06 |
| filingDate | 1934-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1936-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-441389-A |
| titleOfInvention | Improvements in the manufacture and production of dyestuffs |
| abstract | Triarylmethane dyestuffs are obtained from nitriles having the formula <FORM:0441389/IV/1> in which R is hydrogen, alkyl, hydroxyalkyl or aralkyl, or substitution or saponification products thereof. The nitriles are condensed in the usual way with 4 : 4<1>-tetraalkyldiaminobenzophenones or, with oxidation, with aromatic aldehydes, 4 : 4<1>-tetraalkyldiaminobenzhydrols or 4 : 4<1>-dialkyldiaralkyldiaminodiaryl-methanes having a sulphonic group attached to each aralkyl group. Similar dyestuffs are also obtained by condensing, with oxidation, secondary or tertiary aromatic amines with 4 : 4<1>-dicyanethyldisulphoaralkyldiaminodiaryl - methanes. In examples: (1) 4 : 4<1>-tetraethyldiaminobenzophenone is condensed in the presence of phosphorus oxychloride with p a -naphthylaminopropionitrile to give a dyestuff which dyes paper, cotton mordanted with tannic acid and silk pure blue shades; (2) diethyldibenzyldiaminodiphenylmethanedisulphonic acid is oxidized with bichromate and sulphuric acid in the presence of N-ethyl-N-phenylamino propionitrile to give a dyestuff which dyes wool and silk reddish violet shades; the following nitriles may also be used, phenylamino - 2<1> - methylphenylamino -, N - ethyl - 3<1> - methylphenylamino and N-hydroxyethylphenylamino - 3 - propionitriles; (3) a diarylmethane is formed from formaldehyde and N - benzyl - N - phenylaminopropionitrile monosulphonic acid, which may be obtained by sulphonation of the parent nitrile, and is oxidized in the presence of diethylaniline or ethylbenzylanilines; (4) benzaldehyde-o-sulphonic acid is condensed with N-hydroxyethylphenylaminopropionitrile and oxidized to the dyestuff; when saponified to remove the nitrile groups a dyestuff is obtained which gives alumina lakes; (5) ethylphenylaminopropionitrile is saponified to give ethylphenylaminopropionic acid which is condensed with benzaldehyde-2 : 4-disulphonic acid and oxidized; (6) a dyestuff suitable for dyeing wool, silk and paper and/or colouring lacquers, waxes and artificial masses is obtained by condensing 4 : 4<1>-tetramethyldiaminobenzhydrol with phenylbenzylamino propionic nitrilesulphonic acid sodium salt followed by oxidation; (7) p-chorbenzaldehyde is condensed with the sodium salt of the sulphonic acid of benzylphenylaminopropionitrile and oxidized to the dyestuff; the chloride may be replaced by aromatic amine residues. The arylaminopropionitriles may be prepared by condensing acrilic acid nitrile with the appropriate aromatic base. Specification 404,744 is referred to. |
| priorityDate | 1934-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.