Paints & Coatings
Paints & Coatings
Coatings are complex composites designed to have a stable shelf-life, apply easily to a substrate, and provide lasting durability in varied environments. These performance criteria require disparate materials to be finely dispersed and work cohesively, which presents a major challenge as composites can be unstable and ultimately fail at points of inconsistency. A well-known, tried-and-true method to stabilize composites and improve their uniformity is to use high-quality, gel-grade attapulgite mineral products.
RHEOLOGY MODIFICATION…AND MUCH MORE
For many decades Min-U-Gel® 400 attapulgite thixotropic thickener has been the best value for low-shear rheology control (flow & leveling, sag control, spatter resistance and more) in a wide range of liquid systems. It is most valued as a reliable stabilizer that is derived by its unique colloidal lathe-shaped particles forming a very stable lattice structure that keeps liquids and particles more evenly dispersed and suspended. The uniformity it creates generates unique multi-functional performance benefits well beyond rheological properties, such as syneresis control, suspension, improved tint strength and hiding, reduced pigment flooding and in-can stability.
Unlike other rheology modifiers, Min-U-Gel 400 attapulgite product’s viscosity does not fade from prolonged shear and it is impervious to ionic and bacterial conditions. Min-U-Gel 400 can easily replace other mineral thickeners or partially replace and enhance cellulosic fibers and associative thickeners to lower cost and improve overall coating properties.
Other coating markets served by AMI’s attapulgite products include foundry coatings, plastisols, asphalt-based coatings, as well as other liquid products such as ink, polishes, wax emulsions, lubricants, detergents, liquid pesticides and foliar fertilizer.
Acti-Gel® 208 purified magnesium aluminosilicate provides all the great benefits of Min-U-Gel 400 but with several added benefits, including increasing solids without raising viscosity. Its lower dosage and easy dispersion makes it an ideal post-add (or add-on-top) fix for syneresis and stability problems, without changing rheology.
In color concentrates, Acti-Gel 208 provides improved flowability to aid droplet formation and improves long term stability. Its low dosage has no impact on color and 5-10% higher pigment loadings are possible without increasing viscosity. More Information
COST-REDUCING KAOLIN EXTENDER PIGMENT
Air-float kaolin products have long been used in a variety of coatings. The most popular applications are:
- high gloss floor enamels
- machine and equipment enamels
- wood stains
Our Acti-Min kaolin products provide desirable performance advantages in gloss and sheen control, enamel holdout, anti-settling, and sanding properties.
Acti-Min® PG kaolin extender pigment is our highest brightness product. Combined with its low screen residue (+325 mesh wet residue <0.1% or 5+ Hegman) and superior gloss & sheen control, Acti-Min® PG is a viable lbs-for-lbs direct replacement for higher cost water-washed kaolin products in coatings and similar applications. It’s very fine and narrow particle size distribution in the 0.25 micron range has shown to be more effective at TiO2 extension in latex paint than standard water-washed kaolin grades.