Solvent borne pigment concentrates based on coloured organic pigments, containing Laropal A 81

This document outlines the formulation for solvent-borne pigment concentrates based on colored organic pigments, with Laropal A 81 as a key component. Here's a breakdown:

Formulation Components:

• Pigment Paste: Four pigment pastes labeled A, B, C, and D are listed, each containing different colored organic pigments:
  • Pigment Paste A: Novoperm Red F3RK 70 (P.R. 170)
  • Pigment Paste B: Novoperm Orange HL 70 (P.O. 36)
  • Pigment Paste C: Hostapem Violet ER-02 (P.V. 19)
  • Pigment Paste D: Sunfast Violet 23 (P.V. 23)
• Additive: Borchi® Gen 0755 is included as an additive in varying proportions.
• Solvent Mixture: The solvent mixture is composed of methoxy propyl acetate and butyl acetate.
• Laropal A 81: This component is present in the formulation to enhance its properties.

Dispersion Process:

• The dispersion process involves mixing the components for 60 minutes on a Skandex Shaker, likely with 1.5 times 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 15 µm.
• Viscosity: Viscosity measurements at a shear rate of 100 s^-1 and 23 °C indicate the flow behavior of the concentrates. The viscosity is reported to be less than 2000 mPa.s for all pastes.
• Storage Stability: Stability testing under elevated temperature conditions suggests that there is no significant alteration in particle size and color strength over time.