Hoechst Aktiengesellschaft

Siegfried Schwerin

Heinz Uhrig

Joachim Ribka

Reinhold Deubel

Dieter Schnaitmann

Wolfgang Rieper

Hans-Joachim Metz

Peter Dopfer

Johann Ostermeier

The invention relates to mixtures of nitrogen-containing surface-active agents which are obtained by esterification of oxyalkylates based on modified or nonmodified naturally occurring resin acids or resin amines or resin alcohols derived therefrom with dicarboxylic acids or anhydrides thereof and subsequent reaction with alkylenediamines or alkylenepolyamines. These nitrogen-containing surface-active agents are suitable as coupling auxiliaries, emulsifiers, dispersing agents, preparation agents for solids dispersions, corrosion protection and metal-working agents and as wetting agents and dyeing auxiliaries.

Nitrogen-containing surface-active agents

Nitrogen-containing condensation products based on unmodified or modified natural resins, process for the preparation thereof and the use thereof. The invention relates to surface-active agents of the general formula

Nitrogen-containing condensation products based on unmodified or

Intense azo pigment formulations which have good flow and are readily dispersible are obtained on adding a long-chain aliphatic primary amine and a diamine of the formula

Azo pigment formulations

A form of the disazo pigment C.I. 20040 having the formula 30% of ##STR1## IS SHOWN HAVING IMPROVED COVERING POWER, IMPROVED FLUIDITY IN LACQUER SYSTEMS AND HIGH LUSTER, WHICH IS CHARACTERIZED BY A SPECIFIC SURFACE OF 10 - 20, PREFERABLY 12 - 17 M.sup.2 /G AND A MAXIMUM IN GRAIN DIAMETER DISTRIBUTION BETWEEN 500 AND 1000 NM, AT LEAST 30 % OF ALL GRAINS HAVING A DIAMETER OF FROM 500 TO 1000 NM AND LESS THAN 25% OF ALL GRAINS HAVING A DIAMETER OR MORE THAN 1000 NM. This new pigment is obtained by isolating the pigment, after coupling, by stirring it out with alkali and, after having filtered it off and washed until neutrality, heating it to temperatures above 100.degree. C with an organic solvent which is immiscible with water or miscible with water to a limited degree only.

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Hofheim am Taunus, Germany

Siegfried Schwerin