Hoechst Aktiengesellschaft

Vianova Resins, Inc.

Hoechst Aktiengesellschaft Ag

Stefan Petri

Armin Pfeil

Claus Godau

Joerg-Peter Geisler

Dieter Dreischhoff

Michael Hoenel

Matthias Wolfgang Meyer

Paul Oberressl

Bernhard Stengel-Rutkowski

An emulsifier composition for water-dilutable epoxy resins comprise condensation products of an aliphatic polyol component having a weight-average molar mass (M.sub.w) of from 200 to 20,000 g/mol, where a mass fraction of at least 5%, has a weight-average molar mass (M.sub.w) of at least 4000 g/mol, and an epoxide component having of at least one epoxide compound having at least two epoxide groups per molecule and an epoxide group content of from 500 to 10,000 mmol/kg, the ratio of the number of hydroxyl groups to that of the epoxide groups (OH):(EP) being from 1:3.51 to 1:10. When the emulsifier is used for the preparation of aqueous epoxy resin systems, the end of the pot life is indicated by a sharp rise in viscosity.

Emulsifier from condensing polyether polyol(s) and polyepoxide

Aqueous epoxy resin dispersion comprising (A) an epoxy resin which is a condensation product of (A-1) from 50 to 95% by weight, preferably from 55 to 85% by weight, of one or more epoxide compounds having at least two epoxide groups per molecule and an epoxide equivalent mass of from 100 to 2000 g/mol, (A-2) from 5 to 50% by weight, preferably from 15 to 45% by weight, of an aromatic polyol; and (A-3) from 0 to 25% by weight, preferably from 0 to 10% by weight, of modifying compounds containing at least two epoxide-reactive groups; (B) a dispersant comprising (B-1) a condensation product of a polyol having a weight-average molecular mass (M.sub.w) of from 200 to 20,000 g/mol and an epoxide compound having on average at least two epoxide groups per molecule and an epoxide equivalent mass of from 100 to 10,000 g/mol, and (B-2) if desired other surfactants, preferably nonionic surfactants; (C) a polymer, prepared in this dispersion, of ethylenically unsaturated monomers which are capable of free-radical polymerization or copolymerization; (D) a curing agent for the epoxy resin (A); and (E) if desired, conventional additives and catalysts. These aqueous epoxy resin dispersions are suitable for the production of coatings, in particular for interior coatings of cans for beverages and preserves.

Aqueous, modified epoxy resin dispersions

Polyol/epoxy adducts obtained by reaction of

Polyol/epoxy adducts for use as emulsifier for liquid epoxy resins

Crosslinked polymer microparticles based on epoxy resin obtained by polymerization of aqueous dispersions (A) of compounds containing epoxide groups in the presence of up to 0.2 mol, preferably 0.02 to 0.15 mol (based on the nitrogen contained in (B)) of a nitrogen-containing organic compound (B) per epoxide equivalent and subsequent isolation which are preferably in the form of aqueous dispersions thereof, and are suitable as organic fillers, pigments, matting agents and/or reinforcing agents for binder systems and individual components thereof, paint formulations, coating and molding compositions, intermediate coatings, adhesives and the like, preferably based on water.

Crosslinked polymer microparticles based on epoxy resin, their

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Taunusstein, Germany

Stefan Petri