Process for the preparation of quinacridone pigments

Details Process for the preparation of quinacridone pigments Process for the preparation of quinacridone pigments

C - Chemistry, Metallurgy

09

B

C09B 48/00 (2006.01) B02C 17/00 (2006.01) C08K 5/3437 (2006.01) C09B 67/00 (2006.01) C09B 67/22 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2141725

Pigments, mixed-crystal pigments or pigment preparations based on linear, unsubstituted or substituted quinacri- dones are prepared advantageously by initially wet- milling the coarsely crystalline crude pigments in a liquid aqueous, aqueous-organic or organic medium in a stirred ball mill which is operated at a power density of more than 2.5 kW per liter of milling space and a peripheral stirrer speed of more than 12 m/s under the action of grinding media having a diameter of less than or equal to 0.9 mm, until the desired degree of fine division is reached, and then isolating the resulting pigment in a conventional manner, or subjecting the resulting prepigment to solvent treatment at a temperature of from 50 to 200°C and then isolating the pigment in a conventional manner.

Affiliated with

Also associated with

Rating

Process for the preparation of quinacridone pigments 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 the preparation of quinacridone pigments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of quinacridone pigments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1957654