Pigment Red 122

CAS

980-26-7

Catalog Number

ACM980267

Category

Main Products

Molecular Weight

340.39

Molecular Formula

C22H16N2O2

MSDS COA Spec Sheet

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Specification

Synonyms

8 PIGMENT RED 8;9 PIGMENT RED 9;112 PIGMENT RED 112;PIGMENT RED;53:1 PIGMENT RED 53:1;207 PIGMENT RED 207;PR122 QUINACRIDONE MAGENTA;Quinacridone Pigment

IUPAC Name

2,9-dimethyl-5,12-dihydroquinolino[2,3-b]acridine-7,14-dione

Canonical SMILES

CC1=CC2=C(C=C1)NC3=CC4=C(C=C3C2=O)NC5=C(C4=O)C=C(C=C5)C

InChI Key

TXWSZJSDZKWQAU-UHFFFAOYSA-N

Flash Point

221.4°C

Density

1.307 g/cm³

Application

Pigment Red 122, also known as an all-around pink, is a Quinacridone chemistry-based pigment that is suitable for various polymer applications. It offers higher tinting strength than pigment violet 19, with excellent resistance to migration and heat stability. When dissolved in its medium, PR 122 changes color at low concentrations, making it an ideal standard bluish pigment red option. Comparably, it is similar to Clariant Pink E and E 01, making it a versatile choice for a variety of uses.

Assay

0.9999

EC Number

213-561-3

Packaging

1 kg

Application of copolymers in encapsulated pigment red 122 dispersions

Particle sizes distribution of pigment dispersion used PSMA as dispersant

Shao-Hai, Fu, and Fang Kuan-Jun. Journal of Applied Polymer Science 105.2 (2007): 317-321.

Styrene-maleic acid copolymers were synthesized by free radical polymerization. Encapsulated pigment red 122 dispersions were prepared by sedimentation using these copolymers. The effects of copolymer structure such as the molar content of maleic acid, molecular weight and amount of copolymer on the stability and particle size of the dispersion were studied. The results showed that the encapsulated pigment dispersion had higher stability and smaller particle size. When the molar content of maleic acid was 0.43, the intrinsic viscosity was 79.65 ml/g and the amount of copolymer was 10%, a narrow particle distribution could be obtained. The thickness of the encapsulation layer was observed to be about 5nm by TEM.
A certain amount of PSMA was dissolved in a solvent, and then a corresponding amount of pigment red 122 filter cake was added to the solution under stirring. The mixed slurry was transferred to disperse at 4000 rpm for 1 h, and an adsorption promoter that could reduce the solubility of PSMA in the solvent was added to the slurry, and PSMA was slowly deposited and encapsulated on the surface of the pigment. The mixture was vacuum filtered and dried in an oven at 45°C for 24 hours to obtain the encapsulated pigment. Prepare a dispersion with 5 grams of encapsulated pigment and 95 grams of distilled water, adjust the pH to 8 with sodium hydroxide solution, heat and stir at 45°C for 30 minutes. The stability of the encapsulated pigment dispersion was determined by centrifugation and freeze-thaw methods. Centrifugation method reference. Centrifuge the encapsulated pigment dispersion at 4000 rpm for 60 minutes, then take out 0.03 g of the supernatant in the centrifuge tube and dilute it to 2000 times with distilled water. Then measure the absorbance A of the supernatant by a spectrophotometer.

Dispersion Processing of Pigment Red 122

Simplex design plot of the design of experiment for Pigment red 122

Paajanen, Hans. (2018).

One method of manufacturing UV-curable inks is to mix a pigment dispersion with monomers, oligomers, photoinitiators, and additives. In many cases, creating a pigment dispersion is the first processing step in manufacturing UV-curable inks and is very important. To process the pigment dispersions of Pigment Red 2 and Pigment Red 122, a dissolver was used for a pre-mixing step followed by a grinding step using a three-roll mill. The components of the dispersions were a monomer/oligomer mixture of acrylates, pigment, and dispersant. The optimal monomer/oligomer mixture of acrylates was determined by the Daniel flow point method. When processing using a three-roll mill, the processing time as well as the final viscosity of the dispersion becomes very important. Each dispersion was passed through the three-roll mill three times and the passing time was recorded to obtain the processing time. To find the correlation between processing time and viscosity, an experimental design was performed for two different pigments. The design of the experimental model was an extreme vertex design type that allows setting upper and lower limits for the input variables.
Based on the experimental design, the expected viscosity and processing time can be estimated. For Pigment Red 2, the model suggested a processing time of 14.47 g/min and a viscosity of 44.58 Pa*s. The actual processing time was 16.46 g/min and a viscosity of 49.10 Pa*s. For Pigment Red 122, the predicted processing time was 24.35 g/min and a viscosity of 43.04 Pa*s. The result was a processing time of 22.98 g/min and a viscosity of 43.80 Pa*s. The use of the Daniel flow point method in combination with the design of experiments can be used to effectively screen the optimum values of monomers/oligomers for new pigments and UV-curable inks. For the experimental design of the Pigment Red 122 dispersion, a mixture design of the extreme vertex type was used. The mixture of monomers/oligomers is a direct result of the optimal mixture found based on the Daniel flow point method for Pigment Red 122. The dispersants used are the polyacrylate dispersants mentioned in Table 4.1. These lower and upper bounds were inserted in Minitab 17, and just like the Pigment Red 2 DOE, the runs were randomized. The degree of the design was set to 2, the same as the DOE for Pigment Red 2. The design space had 13 data points for collecting data. In the simplex design plot, there are 13 blue circles representing the points where data were collected. Processing Time is the variable, with the processing time (in grams per minute) that the pigment was processed in the three-roll mill and the viscosity of the processed dispersion at a shear rate of 50 seconds. The processed dispersion was also checked using a grinder to ensure a high quality dispersion.