Hoechst Aktiengesellschaft

Herberts Gmbh

Rolf Reinecke

Helmut Rinno

Helmut Braun

Werner Stelzel

Karl J Rauterkus

Gernot Lohr

Reiner Bohmert

Gerhart Schultz

Roland Grutter

Werner Schmieder

Wolfgang Winstel

Eleonore Lutz

A thermosetting coating composition containing

Thermosetting coating compositions and their use

An aqueous plastics dispersion is manufactured by copolymerization of several olefinically unsaturated monomers, one of them at least being free from amide and sulfo groups, one of them at least having an amide group and one of them at least having a sulfo group. Copolymerization is carried out in an aqueous medium under usual conditions. The resulting copolymer has a second order transition temperature of 20.degree. C. at most. The plastics dispersion is compatible with cement and serves as additive in cement-containing building materials.

Aqueous dispersion of sulfo-containing polymers for cement additive

A protective colloid-free plastics dispersion yielding after drying a polymer film which under the influence of moisture has no or little tendency to whitening contains polymer particles having a bimodal size distribution, that is, on the one hand relatively coarse particles and on the other hand relatively fine particles. The polymer component consists of at least 10 weight % of particles having an average diameter of less than 0.2 .mu.m and of 90 weight % at most of particles having an average diameter of more than 0.25 .mu.m, and the ratio of average grain size of coarse to fine polymer is at least 2:1. The plastics dispersion is suitable especially as binder dispersion in plasters and gloss paints.

Protective colloid-free plastics dispersion having a bimodal particle

The wet adhesion of plastics dispersions and of paints made therewith is widely improved, if in the manufacture of the dispersions a nucleophilically substitutable .alpha.-.beta.-unsaturated halogen compound in an amount of 0.5 to 10% by weight calculated on the total amount of monomers is copolymerized, and the dispersion so obtained is reacted with ammonia at a temperature of at least 50.degree. C.

Process for the manufacture of plastics dispersions

The wet adhesion of plastics dispersions and of paints made therewith is widely improved, if in the manufacture of the dispersions a glycidyl ester of an olefinically unsaturated carboxylic acid in an amount of 0.5 to 10% by weight calculated on the total amount of monomers is copolymerized, and the dispersion so obtained is reacted with ammonia at a temperature of at least 50.degree. C.

Acrylic ester copolymers are obtained by copolymerizing acrylic esters with .alpha.-haloalkanecarboxylic acid vinyl esters and .alpha., .beta.-ethylenically unsaturated carboxylic acids and optionally other unsaturated monomers in aqueous dispersion. The copolymers can be cross-linked with alkalies after polymerization and may be used as pressure-sensitive adhesives of high heat stability.

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Wiesbaden, Germany

Rolf Reinecke