The field of coatings technology has utilized many forms of fumed silica in the last 70 years. Due to highly adaptable surfaces and structure, numerous grades have been developed over the decades to provide functional solutions to many coatings problems. Successful use of technology is contingent on adequate dispersion, which often requires some type of milling technology. Now, an innovative downstream process breakthrough has created an easy-to-disperse fumed silica design on an experimental scale to enable formulators to use technology without the need for high intensity milling.
Historically, there are many tailor made designs which resulted from fumed silica’s adaptable character. These tailor made designs create performance attributes including: rheological flow control, suspension, reinforcement, scratch resistance using standard high speed dispersion which replaces more intense bead milling to achieve high efficiency.
This paper will compare performance using both forms of dispersion; standard high speed dissolver type compared to bead-mill type to demonstrate the easy-to-disperse innovation.
Maria Nargiello graduated with a BS degree from Upsala College in NJ, with a double major in Chemistry and Biology and a minor in Environmental Science. She has worked in the Applied Technology and Technical Service department in NJ and OH at Evonik Corporation for 30+ years. She has held various technical management positions, responsible for product lines including AEROSIL® fumed silica, AEROXIDE® fumed Oxides, AERODISP® metal oxide dispersions, ACEMATT® flatting agents, SIPERNAT® precipitated silica, and IDISIL® colloidal silica dispersions for various industries. Currently, she is the Technical Director for the Standard Silica and Coatings segments serving Silicone, Resins and Ink industry areas. Maria coordinates applied research and technical service for these industries in NAFTA.