PRODUCTION OF FOAM SHEETS OF HIGH COMPRESSIVE STRENGTH

摘要

Foam sheets of high compressive strength are produced by extruding a mixture of a styrene polymer and from 5 to 16% by weight of a blowing agent mixture containing a) from 3 to 70% by weight of an alcohol or ketone having a boiling point of from 56 DEG to 100 DEG C., b) from 5 to 50% by weight of carbon dioxide and c) from 0 to 90% by weight of a saturated C3- to C5-hydrocarbon and/or of a hydrogen-containing chlorofluorocarbon or fluorinated hydrocarbon boiling at from -30 DEG to +30 DEG C.