Hoechst Aktiengesellschaft

Walter Muller

Wilfried Walkenhorst

Richard Gauer

Gerhard Wild

Dieter Steidl

Ewald Preisegger

Joachim Naumann

Franz Eichenseer

Martin Schnauber

The invention relates to a method for testing objects by thermal shock in a closed apparatus, comprising the following, preferably repeated steps:

Method and device for the thermal shock test

In an apparatus for a treatment of flowing media which causes heat exchange and mixing internal fittings are located within a housing, which internal fittings consist of tubes extending in the axial direction of the housing, each such tube containing a plurality of elbow-shaped tube portions connected by other tube portions, said tubes being arranged in parallel to one another with the connecting tube portions of adjacent tubes crossing one another.

Apparatus for a treatment of flowing media which causes heat exchange

Styrene-containing polymers are produced by one- or multi-stage prepolymerization and subsequent continuous, one- or multi-stage main polymerization with final working up. In the main polymerization stage(s) the mixture is subjected simultaneously to a heat exchange and a static mixing procedure.

Process for continuous mass polymerization of alkenyl-aromatic compounds

A method of reducing the particle size of cellulose compounds selected from the group consisting of cellulose and ether derivatives thereof which comprises grinding said compounds in a vibration mill in the presence of air and in the presence of sufficient water to yield a product having a water content of from 2 to 10% by weight, wherein at least 50% of the particles in the product have a particle size of 100 .mu. or less, a product obtained by said method and a binder composition containing said product.

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Kelkheim, Germany

Walter Muller