公开(公告)号：DE2501680A1

公开(公告)日：1976-07-22

申请号：DE2501680

申请日：1975-01-17

Applicant: BASF AG

Inventor： WALTER MANFRED DR ,  WIRTH HEINRICH DR ,  HINSELMANN KLAUS DIPL ING ,  SCHICK RUPERT DR ,  WEBER HEINZ DR ,  PENZIEN KLAUS DR

IPC: C08J9/00 ,  C08J9/16 ,  C08L25/04 ,  C08J9/22 ,  C08K5/02

Abstract: Finely divided expansible styrene polymer particles, for the prodn. of foram mouldings, contain 0.0001-0.2 phr of a nucleating agent (I) in non-homogeneous distribution, (I) being situated only in a thin band at the surface of the particles and virtually absent in the interior. Mouldings obtd. from the particles can be demoulded after a short dwell-time in the mould, have very low thermal conductivity (due to the coarse internal pore structure), have good dimensional stability (i.e. no lateral depression) and have homogeneous density.