Chemische Werke Huls Aktiengesellschaft

Huels Aktiengesellschaft

Dirk Reese

Josef K Rigler

Horst Leithauser

Walter Trautmann

Horst Leithoeuser

Horst Leithaeuser

A process for producing styrene-containing polymers having a narrow particle size distribution, comprising the steps:

Process for producing styrene polymers with narrow particle size

The invention relates to the preparation of low-viscosity aqueous dispersions of glycerol esters of long-chain fatty acids by dispersing under mechanical agitation in the aqueous phase, wherein the starting material is constituted by soap-free glycerol esters having a content of less than 2% by weight of free glycerol esters, a content is set of 0.5-6% by weight of alkali soaps of long-chain fatty acids. The dispersions are utilized for the coating of expandable finely divided styrene polymers.

Process for the preparation of low viscosity aqueous dispersion of

A process for controlling bead size in the manufacture of expandable styrene polymers by suspension polymerization, wherein, referred to the aqueous phase, a concentration of ions of calcium, aluminum, metals of the 1st, 2nd, or 6th through 8th side groups of the period table of elements of 3.times.10.sup.31 5 to 3.times.10.sup.-2 % by mass is established, these metal ions being present as cations in the higher oxidation stage of water-soluble, inorganic salts.

Process for controlling bead size in the manufacture of expandable

Fine particulate expandable styrene polymers suitable for the production of molded bodies with improved minimum mold dwell times, containing 0.01 to 2.0% by weight, referred to the polystyrene or the total of the polymerized monomers, of polyoctenamer having I values from about 10 to 400 ml/g and trans octylene contents from about 20 to 90%.

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Marl, Germany

Dirk Reese