公开(公告)号：DE3234660A1

公开(公告)日：1984-03-22

申请号：DE3234660

申请日：1982-09-18

Applicant: BASF AG

Inventor： HAHN KLAUS DR ,  WITTMER PAUL DR ,  DE GRAVE ISIDOOR DR ,  SCHICK RUPERT DR ,  ECHTE ADOLF DR

IPC: C08J9/16 ,  C08F2/38 ,  C08F12/08 ,  C08F112/08 ,  C08J9/20

公开(公告)号：DE2448476A1

公开(公告)日：1976-04-22

申请号：DE2448476

申请日：1974-10-11

Applicant: BASF AG

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

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

Abstract: Finely divided, expandable styrene polymer for the prepn. of foamed bodies contains 0.0001-0.2% calcd. on the styrene polymer, of a nucleating agent for the expandable polystyrene, in inhomogeneous distribution, the nucleating agent being present in only a narrow marginal zone of the particle, the interior of the particle being free from nucleating agent. Used as esp. effective heat-conducting matl.; after foaming, each particle contains internally 5-7 cells) mm, whilst the narrow marginal zone shows a much larger cell count.

公开(公告)号：DE2448956A1

公开(公告)日：1976-04-29

申请号：DE2448956

申请日：1974-10-15

Applicant: BASF AG

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

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

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.

公开(公告)号：CH538425A

公开(公告)日：1973-08-15

申请号：CH1473172

申请日：1972-10-09

Applicant: BASF AG

Inventor： STAHNECKER ERHARD DR ,  GEORG RUPPERT ,  MOELLER ROLF DR ,  SCHICK RUPERT DR ,  ZUERN LUDWIG DR

IPC: B29C44/56 ,  B29C53/00 ,  B29C59/00 ,  B29C59/04 ,  B29C69/00 ,  B29D99/00 ,  B65D65/00 ,  B65D81/09 ,  B68G1/00 ,  B29D27/00 ,  B65D65/44

公开(公告)号：DE3365455D1

公开(公告)日：1986-09-25

申请号：DE3365455

申请日：1983-09-08

Applicant: BASF AG

Inventor： HAHN KLAUS DR ,  WITTMER PAUL DR ,  DE GRAVE ISIDOOR DR ,  SCHICK RUPERT DR ,  ECHTE ADOLF DR

IPC: C08J9/16 ,  C08F2/38 ,  C08F12/08 ,  C08F112/08 ,  C08J9/20

公开(公告)号：DE3234664A1

公开(公告)日：1984-03-22

申请号：DE3234664

申请日：1982-09-18

Applicant: BASF AG

Inventor： HAHN KLAUS DR ,  DE GRAVE ISIDOOR DR ,  SCHICK RUPERT DR

IPC: C08F2/18 ,  C08F2/38 ,  C08F2/44 ,  C08F12/12 ,  C08J9/16 ,  C08J9/20 ,  C08L25/16

Abstract: The invention relates to pre-expanded plastic beads based on poly-para-methylstyrene with the following properties: (a) the bead size lies between 0.2 and 3 cm, (b) the thermal stability, measured in accordance with DIN 53,424 is above 110 DEG C., and (c) the bulk density is below 35 g/l. The corresponding expandable plastic beads are prepared through the polymerization of para-methylstyrene in an aqueous suspension with the addition of volatile organic blowing agents during or after polymerization, whereby polymerization occurs in the presence of molecular-weight-regulating substances. Typical molecular-weight-regulating substances are organic chain transfer agents with a transfer constant K between 0.1 and 50, said agents being added in amounts ranging from 0.1 percent by weight to 1 percent by weight when a yield ranging from 20 to 95 percent is reached. Oligomers of the styrene or para-methylstyrene in quantities from 0.1 percent by weight to 10 percent by weight may also be employed.

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.

公开(公告)号：DE2154754A1

公开(公告)日：1973-05-24

申请号：DE2154754

申请日：1971-11-04

Applicant: BASF AG

Inventor： STAHNECKER ERHARD DR ,  RUPPERT GEORG ,  MOELLER ROLF DR ,  SCHICK RUPERT DR ,  ZUERN LUDWIG DR

IPC: B29C44/56 ,  B29C53/00 ,  B29C59/00 ,  B29C59/04 ,  B29C69/00 ,  B29D99/00 ,  B65D65/00 ,  B65D81/09 ,  B29D27/00