Process for producing transparent pigmentary quinacridones by ac

Details Process for producing transparent pigmentary quinacridones by ac Process for producing transparent pigmentary quinacridones by ac

1997-12-03

1999-07-06

Green, Anthony

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106495, 546 49, C09B 4800

Patent

active

059192992

ABSTRACT:
A process for preparing transparent, pigmentary quinacridone compounds and solid solutions thereof comprises combining a premilled, sub-pigmentary powder containing at least one unsubstituted or substituted quinacridone or a derivative thereof with a sufficient amount of moderately concentrated sulfuric acid to form a slurry, then agitating this slurry in the presence of an organic liquid which is immiscible or only partially miscible with the slurry and which is effective in deagreggating and improving the crystallinity of the pigment, for an effective length of time to convert the sub-pigmentary unsubstituted or substituted quinacridone or solid solution thereof to a transparent, pigmentary form.

REFERENCES:
patent: 3124581 (1964-03-01), Bohler et al.
patent: 3157659 (1964-11-01), Deuschel et al.
patent: 3160510 (1964-12-01), Ehrich
patent: 3790575 (1974-02-01), Hafele et al.
patent: 3793327 (1974-02-01), Jaffe
patent: 4247695 (1981-01-01), Fitzgerald
patent: 4247696 (1981-01-01), Shibata et al.
patent: 4455173 (1984-06-01), Jaffe
patent: 4857646 (1989-08-01), Jaffe
patent: 4881980 (1989-11-01), Dietz et al.
patent: 5318626 (1994-06-01), Maki et al.

Affiliated with

Also associated with

Rating

Process for producing transparent pigmentary quinacridones by ac does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing transparent pigmentary quinacridones by ac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing transparent pigmentary quinacridones by ac will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-896284