Rheology Modifiers Information
Rheology modifiers impart unusual dynamic characteristics on non-Newtonian fluids and plasticized solid suspensions by altering viscosity, rheometry, or flow characteristics of a material. They can affect the pour point, viscosity index, kinematic viscosity, or dispersion of various materials.
Common types of rheology modifiers include:
Leveling agents assist a coating or adhesive maintain a uniform height across a surface by gravitational forces, which eliminates ripples, tracks, bubbles, etc.
Pour point depressants reduce the lowest temperature at which the material will still flow.
Flow promoters/thinners reduce substrate viscosity and increase flow rate. Solvents and diluents can be used to thin a product. A solvent will dissolve a binder, while diluent will thin a product via dissolution of the binder.
Thickener/gelling agents increase viscosity and reduce the rate of flow.
Thixotropic agents impart a fluid with a stable form at rest, but a viscous form when agitated.
Common applications of rheology modifiers include: stabilizing lubricant viscosity in a variety of temperatures, enhance curing and prevent sedimentation in inks and paints, improved permeability and sweep efficiency of suspension drilling fluids, and altering the characteristics of food and pharmaceutical products.