CRAYVALLAC® LA-150

CRAYVALLAC® LA-150 is a liquid rheology modifier designed for post-addition to solvent-based systems. Here are its typical characteristics and properties:

Nature: Urea urethane
Appearance: Clear liquid
Solid Content: 52%
Active Content: 52%
Specific gravity: 1.11
Solvent: DMSO (Dimethylsulfoxide)

Description:
CRAYVALLAC® LA-150 is composed of a modified urea dissolved in DMSO. Upon addition to the final system, the DMSO is diluted, and the modified urea crystallizes out as very fine fibers, forming a three-dimensional interacting network. This network contributes to the system's shear-thinning rheology and time-dependent viscosity recovery. The rheology modifier offers excellent control of sedimentation combined with ease of application. After application, under low shear conditions, the system's viscosity undergoes time-dependent recovery as the network re-establishes itself, providing good leveling, known as thixotropy.

Recommended Addition Level:
0.2-2.0% under low shear dispersion, Post-addition.

Standard Packaging:
Available in 200 Kg drums or 25 Kg pails. Other packaging options may be available upon request.

Handling & Storage:
Store in the original containers in a dry place at temperatures between 20°C (68°F) and 30°C (86°F). Use corrosion-resistant storage tanks and piping. Avoid exposure to direct sunlight or frost. Containers must be tightly closed after use to exclude moisture to prevent premature crystallization of the modified urea. Use within 12 months from production under these conditions.

Processing Instructions:
CRAYVALLAC® LA-150 should be added to the coating as a slow stream under low to medium shear conditions for efficient dispersion. Stirring is required to ensure homogeneity; elevated temperatures are not necessary for activation. Compatibility testing is essential, especially for very polar and non-polar systems, to avoid poor anti-settle and sag resistance performance or crystal clumping. The product contains chloride ions, so additional testing is recommended if stored in metal containers or used in coatings in direct contact with metal substrates to assess corrosion potential.

Market:

• Coatings & Inks
  • Architectural Coating
  • Graphic Arts
  • Industrial Coating
  • Textile & Leather Coating
• Adhesives & Sealants
  • Assembly
  • Other Adhesives

Key Benefits:

• Formulation: Easy handling, post-addition, ready to use.
• Storage: Antisettling, in-can appearance, syneresis resistance, viscosity stability.
• Application: Brushability, rollability, temperature resistance, edge-coverage, sag resistance.
• Film Properties: Gloss, leveling, transparency, pigment orientation.