Basf Aktiengesellschaft

Basfaktiengesellschaft

Peter Gleich

Klaus Hahn

Uwe Guhr

Hans Hintz

Dietmar Wittenberg

Bernhard Schuler

Georg Bobar

Tilmann Korth

Ottokar Flocken

Microcapsules comprise a polymeric wall material and a polymeric core material which is suitable as a leveling agent for film formation by film-forming oligomers and polymers.

Microcapsules containing a core material suitable as a leveling agent

Flame-resistant, expandable styrene polymers containing a styrene (co)polymer, from 0.4 to 6% by weight of hexabromocyclododecane having a mean particle size of from 1 to 50 .mu.m, the particles being provided with a firm coating which has a thickness of from 1/100 to 1/10 of the particle diameter and is insoluble in water and styrene, from 1 to 10% by weight of a C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent, and, if desired, customary additives, are distinguished by a reduced internal water content and can be processed to form foams which have an improved foam structure and high UV stability.

Flame resistant, expandable styrene polymers and foams, and flame

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Ludwigshafen, Germany

Peter Gleich