Pourable liquid polyesteramide rheological additives and the use thererof
AssigneeRheox, Inc.
InventorMahalingam Santhanam
Life of this patent
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Abstract
A liquid, pourable rheological additive especially useful for thickening organic and solvent-based compositions which in one aspect comprises an alkoxylated nitrogen-containing compound, polycarboxylic acid, and a functional chain ending unit. The additive, which exists in a pourable, pumpable form at up to a 100% 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 operates by both an associative and a reaction mechanism to provide rheological viscosity properties to such systems, and is also similarly useful for aqueous systems.
Claims12
A liquid rheological additive for liquid organic systems, free of diluent and pourable at ambient temperature, which imparts thixotropy to such systems, comprising the reaction product of:
- a) the carboxyl terminated reaction product of one or more liquid polyalkoxylated nitrogen containing compounds containing more than one hydroxyl group and which also contain a pendant aliphatic radical of 6 to 40 carbon atoms selected from the group consisting of tertiary amines and amides of secondary amines and one or more polycarboxylic acids;
- and
- b) a chain ending agent different than each of the compounds of a) which contains one or more hydroxyl groups and one or more primary or secondary amino groups wherein the reaction with the chain ending agent forms the thermodynamically favored amide, and wherein said agent is selected from the group consisting of aliphatic, aromatic and cycloaliphatic amino-alcohols.
Dependencies are inferred from the claim text.