http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2235694-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e9445e5e3626f36e932c6451a928250 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0033 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0055 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B67-22 |
| filingDate | 1990-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_84a1f704ab7ae812257f6d14307b03f3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fd8fce5f1a33327fc32ccca22e318f7c |
| publicationDate | 1991-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2235694-A |
| titleOfInvention | Continuous process for the preparation of disazo pigment mixtures |
| abstract | A process for the preparation of disazo pigment mixtures of at least two different disazo pigments of the general formula <IMAGE> wherein R1, R2 and R3 are each hydrogen, halogen, C1-C4 alkyl or C1-C4 alkoxy; X is halogen, C1-C4 alkyl or C1-C4 alkoxy; and Y is hydrogen or halogen, which disazo pigments differ from each other in the significance of at least one of the substituents R1, R2 or R3, by simultaneously coupling a bisdiazotised diaminodiphenyl (A) of formula (II) with a mixture (B) of at least two coupling components of formula (III)- <IMAGE> which process comprises mixing continuously an aqueous acidic solution of at most pH 4 of the bisdiazotised diaminodiphenyl (A) with an aqueous alkaline solution of not lower than pH 12 of the mixture (B) in a molar ratio A:B of 1:2.0 to 2.5, keeping the pH in the range from 4 to 7 by regulating the educt feed, reacting the educts for an average residence time of 1 to 5 minutes, and isolating the resultant pigment mixture by filtration. The resultant pigment mixtures have improved pigmentary and rheological properties. |
| priorityDate | 1989-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.