Exilva

The concentration of the Exilva product influences the techniques chosen to prepare the suspensions. In general, high shear mixing should be used whenever possible.

The 2% gel can be dispersed with lower shear into the formulation, whereas the 10% paste always requires the use of high shear.

High shear means the use of a stator-rotor homogenizer (e.g., Ultra Turrax, Silverson) and low shear high stirring speed propeller or blade mixer.

Dispersion times depend highly on the scale and the equipment used, as well as on the composition of your formulation. The following examples demonstrate the performance of different dispersion equipment for different Exilva grades in water at lab scale. You should always evaluate your own system to ensure proper dispersion of Exilva

Evaluation of the Dispersion

• Visible lumps or aggregates are a clear indicative of an undispersed material. Also, immediate sedimentation or phase separation might indicate insufficient dispersion. Correctly dispersed material will show efficient thickening effect with a smooth appearance.
• If you suspect that the dispersion is not optimal, you can test increasing the stirring speed and/or time and follow the viscosity. If the viscosity continues to increase, the original mixing was not sufficient.

Improves rheology

• Strong thickening and shear thinning
• Readily activated with no hydration time required
• Fast viscosity recovery and excellent anti-sag properties
• Reduction or replacement of the rheology additive

Improves anti-settling of particles

• Replacement of thickener

Control of transmission/reflection of light

• Reduces the amount of mattifying agent

High water holding capacity

• Prevents cracking at low temperature film formation
• Reduces the amount of coalescence agent
• Reduces or replaces the open-timer agent

Emulsion stabilizer

• Reduces the amount of surfactant

Increases formulation efficiency

• Multifunctional qualities reduce cost of formulation