C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
6/217, 260/275,
C09B 48/00 (2006.01) C09B 67/22 (2006.01) D06P 1/22 (2006.01)
Patent
CA 1336776
A process for the preparation of 2,9-dimethylquinacridone pigments or mixed crystal pigments or mixtures of 2,9-di- methylquinacridone and quinacridones which in the two outer fused benzene rings can be substituted by halogen, alkyl, alkoxy, H2N-CO-, alkyl-NH-CO-or (alkyl)2N-CO groups characterized by the form of their crystalline particles which have an average ratio of length to width of <2:1 and an average particle size of <0.4 µm, by adding to the solution of 2,9-dimethylquinacridone or to the solution of 2,9-dimethylquinacridone together with the quinacridones in acidic solvents and/or during the hydrolysis of these acidic solutions at temperatures from about 0° to about 150°C, and/or before or during the finishing of the corresponding crude quinacridones of the quinacridones mentioned in water or solvent mixtures at temperatures from about 60 to about 200°C, in each case a compound of the general formula (I) Image (I) in an amount of about 1 to 20 % by weight, in which in formula (I) Q is a quinacridone radical which is unsub- stituted or substituted by halogen, alkyl, alkoxy, H2N- CO-, alkyl-NH-CO- or (alkyl)2N-CO- groups, A is a direct bond or a bridge member from the series comprising -O-, -S-, -NR1-, -CO-, -SO2-, -CR2R3-, or arylene, and Y is an -NR4R5 group or the radical of a five-, six- or seven- membered heterocycle which contains one to three hetero atoms and can be substituted by alkyl, alkoxy, hydroxy- phenyl, halogen, -CN, carboxyl, -CO-NRR', -SO2-NRR', hydroxyalkyl or alkylaminoalkyl, R and R' are hydrogen or alkyl, and R1 to R5 are hydrogen and/or alkyl or alkylene , and n is a number from 1 to 4, the pigments themselves thus prepared and their use for the pigmenting of natural or synthetic materials and of lacquer systems.
614210
Dietz Erwin
Kroh Adolf
Clariant Produkte (deutschland) Gmbh
Fetherstonhaugh & Co.
LandOfFree
Quinacridone pigments, process for their preparation and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quinacridone pigments, process for their preparation and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quinacridone pigments, process for their preparation and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1210073