| abstract |
A liquid, pourable 100% active rheological additive especially useful for thickening non-aqueous compositions is described. The additive, which exists in a pourable form at up to a 100% as a rheologically active composition, exhibits excellent thickening efficiency for systems including inks, epoxies, polyesters, paints, greases and other systems, including ease of dispersibility, without adversely affecting gloss. The additive may operate by both an associative and a reaction mechanism to provide rheological viscosity properties to such systems, and is also similarly useful for aqueous systems. One important aspect of the present invention relates to a liquid rheological additive composition comprising a reaction product obtained from the reaction of: a) One or more active hydrogen compounds, wherein the active hydrogen compound contains at least two active hydrogen moieties; and b) One or more compounds containing at least two moieties which are capable of reacting with the active hydrogen moieties of (a), wherein the active hydrogen moieties of compound a) are in stoichiometric excess of the reactive moieties of compound b); and the reaction product has at least two active hydrogen moieties at its termini. |