Graft polymers of ketone-aldehyde condensation and co-condensation products

US5705599A · kind A · utility

Assignee

• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Josef Felixberger · Traunstein, DE
• Johann Plank · Kelheim, DE

Key dates

• Filing date: Dec 29, 1995
• Grant date: Jan 6, 1998
• Expiry date: Dec 29, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K23/16
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Graft polymers of ketone-aldehyde condensation and co-condensation products and/or the monovalent or polyvalent metal compounds thereof are described, in which condensation product consists a) of symmetrical or asymmetrical ketones containing aliphatic, araliphatic, cyclic or aromatic hydro-carbon radicals with at least one nonaromatic radical, b) an aldehyde of the formula R--(CHO).sub.n, wherein n=1 to 2 and R can be hydrogen or an aliphatic, araliphatic, aromatic or heterocyclic radical, and c) optionally of carboxyl, sulpho, sulphamido, sulphoxy, sulphoalkylamine or sulphoalkyloxy groups, to which product anionic and/or nonionic and/or cationic unsaturated monomers have been grafted. These graft polymers are outstandingly suitable as dispersants for inorganic binder suspensions and solutions, for aqueous clay suspensions and solutions or coal/water suspensions, as retention agents, thickeners, in particular for aqueous systems, and as agents for preventing the swelling of clay in aqueous systems.