CRAYVALLAC LV

Product Details

CRAYVALLAC® LV is a high performance micronised amide wax rheology modifier designed for very high solids and solvent-free systems. CRAYVALLAC® LV shows a peculiar ease of activation and can solve stability issues which are often observed with existing products for solvent-free systems.
 

Benefits

• 100% Active micronised powder
• Efficient activation at 45-65°C (113 - 149°F)
• Imparts shear thinning rheology
• Imparts thixotropic behaviour
• Excellent sag resistance
• Good antisettle properties
• Excellent storage stability

Typical Applications

CRAYVALLAC® LV is ideally incorporated and activated using a high-speed disperser. The use of high-speed dispersers is ideal in that they generate both the necessary and emperature required for full dispersion and activation. 
 
CRAYVALLAC® LV is best added along with the initial charge of resin during the pigment dispersion and grind stage. Efficient activation will be achieved by allowing the temperature during this dispersion process to rise to 45 - 65°C (113 - 149°F), but more preferably from 55 - 65°C (131 - 149°F). This condition of dispersion and temperature control should be maintained for 20 - 30 minutes to ensure full activation. 
 
The activation process constitutes the conversion of the CRAYVALLAC® LV particles to an interacting network of crystalline fibres. It is this network that gives rise to the final coating’s shear thinning rheology. This shear thinning characteristic provides a very high viscosity under the low shear rates associated with sedimentation, and a low viscosity at the much higher shear rates. The net result is excellent control of sedimentation combined with ease of application. 
 
Immediately following application, where low shear conditions again predominate, the coating’s viscosity undergoes a time dependent recovery as the network reestablishes itself. This time dependence is known as thixotropy and enablest he final coating to attain very good levelling and sag resistance.