Resin free organic yellow and blue pigment dispersions, based on Sunbrite yellow 74 272-4608 and Sunfast blue 248-0615

This document describes the formulation of resin-free organic yellow and blue pigment dispersions. Here's a breakdown:

Formulation Components:

• Pigment Paste: Two pigment pastes labeled A and B are listed, containing different organic pigments:
  • Pigment Paste A: Sunbrite Yellow 272-4608 (P.Y. 74)
  • Pigment Paste B: Sunfast Blue 248-615 (P.B.15:2)
• Additive: Borchi® Gen 0851 is included as an additive in varying proportions.
• Water: Water is used as a solvent in the formulation.
• Borchers® AFT: This component is included in the formulation.

Dispersion Process:

• The dispersion process involves mixing the components for 60 minutes on a Skandex BAS-20, likely with 150 g Zr-silicate grinding beads (2mm), to achieve the desired particle size distribution.

Data:

• Particle Size: The particle size achieved during dispersion is reported to be less than 6 µm for Pigment Paste A and less than 7 µm for Pigment Paste B.
• Viscosity: Viscosity measurements at a shear rate of 100 s^-1 and 23 °C indicate the flow behavior of the dispersions. The viscosity is reported to be 280 mPa.s for both pastes.
• Storage Stability: Stability testing under elevated temperature conditions suggests that there is no significant alteration in viscosity and particle size over time.