Cosun Biobased Products is part of Royal Cosun

Rheology Modification

Rheology modification is crucial for many products. Betafib MCF turns your liquids into stable gels under no/low shear conditions whilst providing pumpable and dosable fluids once force is applied. And it offers exceptional stability properties .

Rheology deals with forces that are being applied to a material. As a reaction to this applied force liquids 
will start to flow. And depending on the quantities of the liquid the flowing will show certain properties: liquid concrete will respond differently than a waterborne, thinned paint.

Materials have properties and these will impact the way a specific material reacts to the shearing forces applied, i.e. there is an inherent resistance to release the original form the material has. Viscosity is the quantity that expresses this resistance.

Roughly the scale of rheology ranges from elastic behavior to viscous behavior. Full elasticity means that all the force applied will be stored within the material. Once the force is removed, the material will reverse to its original state. On the other hand viscous materials will hold their newly derived state also after the force is removed. In real life, materials show mixtures of these behaviors.

Why would one want to change a materials inherent rheological behaviour? In general the answer would sound like “this change is desired to meet specific requirements, that even might  seem contradictory”.

For example, which behavior do we expect of paints and coatings? Good leveling but no sagging, good coverage but no brush marking, fast drying but homogenous composition, good container viscosity but no settling of solids, flowing well but not spattering, etc. Typically, a paint will be blended and canned before being transported and/or stored for some time to end up at a location for application. The rheology requirements for a paint vary with the phase of its life cycle. During blending the viscosity should be low, once stored the viscosity should be high to prevent settling of particles and pigments. During application with some tool (brush, paint roller) again a low viscosity is desired. Once the application stroke is ended, the viscosity of the paint should recover to its original high value. The speed at which this process occurs, influences the properties of the film (smooth film, no sagging, no brush marking). And after drying, the film should not show signs of cracking.

Our Betafib MCF offers synergistic effects with other modifiers to meet all these requirements for a perfect result after a perfect shelflife after a perfect application!