Rigid and dimensionally stable foamed plastics mouldings having an outer zone of relatively high density and a core of relatively low density are obtained if a liquefied gas is introduced into a prefoamed preform.
申请公布号
DE3409319(C1)
申请公布日期
1985.03.14
申请号
DE19843409319
申请日期
1984.03.14
申请人
HOECHST AG, 6230 FRANKFURT, DE
发明人
RIEDEL, ERHARD, 6233 KELKHEIM, DE;LOEW, WOLFGANG, 6097 TREBUR, DE
