Hyperdispersants
Hyperdispersants differentiate themselves from standard dispersing agents through considerably higher molecular weights and optimum long term storage stability. Compared to the latter, they allow low foaming (especially in waterborne systems), improved pigment stability and a significant increase in tinctorial properties.
They have been specifically developed to help overcome some of the problems caused by changes in technology due to their ability to successfully wet and stabilize pigments as well as to reduce the effect of the dispersed pigment on the finished paint's (or ink's) rheology.
Recent US Patents
11/23/2010
7,838,582
Hyperdispersant for use in fluorocarbon coating compositions
Anderson, Lindow and Algrim of PPG Industries, Ohio, have developed hyperdispersants for use in a fluorocarbon coating. The fluorocarbon coating composition generally consists of a fluorocarbon resin, a binder resin, a cross-linking agent, and the hyperdispersant. The hyperdispersant a reaction product of a polyglycidyl oligomer and an amino compound. The polyglycidyl oligomer comprises a carbon chain having from 1 to 25 carbon atoms with at least one of an internal ether linkage and an internal ester linkage with epoxy groups. The amino compound has a cyclic, heterocyclic, alkyl, or heteroalkyl structure substituted with at least one primary or secondary amine group for reacting with and opening at least one of the epoxy groups. (RDC 4/9/2011)