Dispersants
Dispersants are additives which promote the dispersion of colloids or nanoparticles in a liquid or solvent. (RDC 326/2008)
“As to aqueous ceramic colloids, most of the present industrial dispersing agents used are acrylate-based polymers or copolymers such as ammonium polymethacrylate (Darvan C) or sodium polyacrylate. In recent years, many researches are conducted on the subjects of using Darvan C or acrylic polymer as a dispersing agent for barium titanate and other ceramic such as aluminum oxide, titanium dioxide, and zirconium oxide powders.” Kung-Chung et al, US Patent 7,572,836, 8/11/2009
Recent US Patents
9/20/2011
8,022,123
Method for manufacturing and dispersing nanoparticles in thermoplastics
Abecassis, Wiegel and Wright of Glen Burnie Technologies treated clays and organoclays with resorcinol diphosphate and/or bisphenol diphosphate as general nanoparticle particle dispersants and replacements for quaternary amines. The two compounds are used as self activating and self dispersing nanoparticles by localizing themselves on the particle surface in a polymer matrix and acting as a nanoparticle dispersants in general, as well as resulting in exfoliation of clays. The exfoliate clays may be used in polymers in lieu of other organic treatments. (RDC 9/25/2011)