Hoechst Aktiengesellschaft

Otmar Hafner

Wolfgang Rieper

Adolf Kroh

Erwin Dietz

Ernst Spietschka

Albert Munkel

Andreas Sommer

Jurgen Hohn

Addition compounds which are suitable as dispersants for solids in organic media are obtained from polyepoxides based on novolaks having 3 to 11 nuclei and a mixture of aliphatic, aromatic and/or heterocyclic amines.

Addition compounds, a process for the preparation, and their use, based

Powdered azo pigments with improved rheological properties for use in paint systems on an alkyd/melamine, acrylic/melamine, acrylate/isocyanate or polyester/isocyanate basis, both of a conventional nature and also of a modern nature of the 'high solids' type, to which--as appropriate before, during or after finishing--1 to 20% by weight of the active substance of a paint additive of the polyurethane series, prepared by reacting polyisocyanurates which still carry free isocyanate groups and are based on toluylene diisocyanate, hexamethylene diisocyanate or mixtures thereof, with (1) aliphatic mono- or polyhydroxycarbonylic acid C.sub.1 -C.sub.20 -alkyl esters (degree of polycondensation 2-50), (2) polyethylene glycols (molecular weight 500-1,500) and (3) 5- or 6-membered, saturated or unsaturated heterocyclic compounds which contain at least one nitrogen atom in the ring and reactive amino or hydroxy-C.sub.1 -C.sub.6 -alkyl groups, until isocyanate groups are no longer detectable, has/have been applied, a process for their preparation and their use for pigmenting paint systems.

Powdered azo pigments with improved rheological properties, process for

Powdered pigments with improved rheological properties, processes for

Addition products formed from polymeric diphenylmethane 4,4'-diisocyanates, amines, monoactive and diactive polymers are suitable for use as dispersants for solids in organic media.

Addition compounds and process for their preparation

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Glashutten, Germany

Otmar Hafner