C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
6/217, 400/7085,
C09B 3/20 (2006.01) C08K 5/04 (2006.01) C08K 5/3432 (2006.01) C09B 67/22 (2006.01)
Patent
CA 2001531
HOE 88/F 303 Abstract of the disclosure: Mixed crystal pigment based on halogenated perylenetetra- carboximides In the art of pigmenting high molecular weight organic materials there is a long-felt need for high-hiding organic red pigments, in particular yellowish red pig- ments, which are increasingly used to replace the ecolog- ically unsafe inorganic red pigments. However, this gap in the market cannot be satisfactorily filled by using the tetrachloroperylenetetracarboximide pigments known for the aforementioned purpose. According to the invention, it has now been found that a chlorine content of ? 25% in such chlorinated perylimides confers remarkable coloristic properties on the pigments thus produced, so that these pigments are superior in hiding powder and masstone to the tetrachloroperylimide compounds described. Accordingly, the invention is directed to high-hiding red pigments of the type of the halogenated perylenetetracarboximides containing up to 4 chlorine atoms, whose chlorine content is 15-25% and which are present as mixed crystal pigments in the .beta.- modification with an average particle size of ideally ? 0.15 µm. Perylimide compounds having a higher chlorine content favor the simultaneous formation of the .alpha.-phase.
Dietz Erwin
Urban Manfred
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
LandOfFree
Mixed crystal pigments based on halogenated... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mixed crystal pigments based on halogenated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixed crystal pigments based on halogenated... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1933329