Abstract PFAS compounds provide surface tension (ST) reduction, coefficient of friction (COF) reduction, hydrophobicity, oleophobicity and chemical stability. These fundamental properties result in applications such as stain resistance, block resistance, oil resistance, lubricity, release, AFFF and many others. Siltech have presented previously on replacing PFAS components with organomodified silicones which provide similar and satisfactory performance on ST, COF and hydrophobicity. The difficult challenge is oleophobicity. We have had some success in this category and will report this here. We will emphasize some UV cured acrylate structures which are giving strong performance in this critical category.
Stability under low shear storage and shipment conditions can be critical to the stability of waterborne coatings and dispersions against sedimentation and syneresis. Judicious selection of a fit-for-purpose low shear thickener plays a crucial role in preventing sedimentation, especially in cases where dense pigments are incorporated into waterborne formulations. During the application process, traditional thickeners enhance sag resistance and influence leveling to facilitate robust film build. More importantly for longer-term storage, low shear thickeners can prevent syneresis in colorant-tinted coating systems. This presentation introduces an innovative rheology modifier technology based on a novel zirconium complex that eliminates sedimentation and syneresis under extremely low shear conditions associated with coating storage and transport. This technology offers the user-friendly option of post-addition under moderate mixing conditions, in contrast to other rheology modifiers that require neutralization and high-speed mixing processes. This presentation shows results illustrating the valuable outcomes achievable through the utilization of this unique low shear thickener platform.
Technical Service Manager, Americas, Borchers: A Milliken Brand
Bio: Michael is the technical service manager for Borchers Americas, a subsidiary of Milliken & Company. In this role, he leads the technical service and applications teams for Borchers coating additives. Michael graduated from the University of Southern Mississippi with a degree... Read More →
"Regulatory activity in both the EU and USA is targeting a large group of chemicals known as PFAS (per- and polyfluoroalkyl substances). As a result, formulators in many industries are working to replace additive powders based on PTFE and PTFE hybrids with alternative materials that provide the same level of performance. This presentation will detail a unique nanocomposite approach to eliminate PTFE in surface additives by replacing PTFE with hard, inert, durable materials such as aluminum oxide and ceramics. Data will be presented to show that this portfolio of over 8 additives provides equal or (in most examples) improved surface durability (lubricity, scratch & abrasion resistance) without the use of PTFE."
Bio: Rich joined Micro Powders in 2011 as Technical Director and is currently Vice President. He has over 35 years of experience in the paints, coatings and inks industries and has led formulation and polymer development teams at companies including Sun Chemical, ICI and Zeneca... Read More →
