公开(公告)号：AT138395T

公开(公告)日：1996-06-15

申请号：AT93109566

申请日：1993-06-16

Applicant: BASF AG

Inventor： WITT MICHAEL DR ,  WALTER MANFRED DR

IPC: C08J9/16 ,  C08F2/18 ,  C08F2/44 ,  C08F12/00 ,  C08F12/08 ,  C08J9/12 ,  C08J9/20

Abstract: Bead-formed expandable styrene polymers are obtained by suspension polymerisation of styrene with addition of from 1 to 10% by weight of C3- to C7-hydrocarbons and/or carbon dioxide as blowing agent and optionally conventional additives, where the suspension stabiliser used is a mixture of magnesium pyrophosphate, a sulphonate group-containing extender and an alkali or alkaline-earth metal carboxylate, magnesium pyrophosphate being prepared directly before the polymerisation by combining an aqueous solution with an alkali metal pyrophosphate with at least the stoichiometrically necessary amount of a magnesium salt.

公开(公告)号：DE4439458A1

公开(公告)日：1996-05-09

申请号：DE4439458

申请日：1994-11-04

Applicant: BASF AG

Inventor： SCHERZER DIETRICH DR ,  WITT MICHAEL DR ,  HAHN KLAUS DR ,  ALICKE GERHARD ,  DEMBEK GERHARD DR ,  RIETHUES MICHAEL DR ,  WOLFF BERNARDO DR

IPC: C08J9/14 ,  C08J9/00 ,  C08J9/16 ,  C08J11/06 ,  C08L23/00 ,  C08L23/06 ,  C08L25/00 ,  C08L25/04 ,  C08L25/06

公开(公告)号：DE59301851D1

公开(公告)日：1996-04-18

申请号：DE59301851

申请日：1993-06-16

Applicant: BASF AG

Inventor： WITT MICHAEL DR ,  HAHN KLAUS DR ,  LORENZ MARIA DR

IPC: C08J9/18

Abstract: A process for the preparation of expandable thermoplastic polymers by post-impregnation with a blowing agent in liquid suspension in the presence of a mixture of magnesium pyrophosphate and a sulphonate group-containing extender as suspension stabiliser in a reactor, characterised in that a) the magnesium pyrophosphate is prepared in the same reactor at a temperature below 50 DEG C by addition of a solid magnesium salt in an amount corresponding to an at least 3% stoichiometric excess, based on pyrophosphate, to an aqueous solution of the pyrophosphate, b) the suspension medium is heated to a temperature in the range between 70 and 140 DEG C, and c) the blowing agent is added in this temperature range.

公开(公告)号：DE4308430A1

公开(公告)日：1994-09-22

申请号：DE4308430

申请日：1993-03-17

Applicant: BASF AG

Inventor： WITT MICHAEL DR ,  SCHERZER DIETRICH DR ,  HAHN KLAUS DR ,  HENN ROLF DR ,  BACK WOLF-DIETER DR

IPC: C08J11/14 ,  A61L9/01 ,  C08J11/06 ,  C08J11/16 ,  C08J11/04 ,  C08J9/36 ,  C08L25/04

公开(公告)号：MY118804A

公开(公告)日：2005-01-31

申请号：MYPI9400314

申请日：1994-02-14

Applicant: BASF AG

Inventor： SCHERZER DIETRICH DR ,  KLAUS HAHN DR ,  RIETHUES MICHAEL DR ,  NAEGELE DIETER DR ,  WITT MICHAEL DR ,  HUSEMANN WOLFRAM DR

IPC: C08J9/20 ,  C08F2/20 ,  C08F2/44 ,  C08J9/00 ,  C08K5/00 ,  C08K5/01 ,  C08K5/03 ,  C08L23/06 ,  C08L25/04 ,  C08L25/06 ,  C08L89/00

Abstract: BEAD-FORM, EXPANDABLE STYRENE POLYMERS CONTAINING, BASED ON THE STYRENE POLYMER, FROM 0.005 TO1.5 BY WEIGHT OF POLYETHYLENE WAX AND FROM 0.005 TO 1 BY WEIGHT OF DIMERIC a-METHYLSTYRENE, AND A PROCESS FOR THE PREPARATION THEREOF.

公开(公告)号：DE59505640D1

公开(公告)日：1999-05-20

申请号：DE59505640

申请日：1995-10-27

Applicant: BASF AG

Inventor： SCHERZER DIETRICH DR ,  WITT MICHAEL DR ,  HAHN KLAUS DR ,  ALICKE GERHARD ,  DEMBEK GERHARD DR ,  RIETHUES MICHAEL DR ,  WOLFF BERNARDO DR

IPC: C08J9/14 ,  C08J9/00 ,  C08J9/16 ,  C08J11/06 ,  C08L23/00 ,  C08L23/06 ,  C08L25/00 ,  C08L25/04 ,  C08L25/06

公开(公告)号：DE19647599A1

公开(公告)日：1998-05-20

申请号：DE19647599

申请日：1996-11-18

Applicant: BASF AG

Inventor： SCHERZER DIETRICH DR ,  HAHN KLAUS DR ,  BATSCHEIDER KARL-HEINZ ,  WITT MICHAEL DR ,  WAGNER BERNHARD DR ,  HUSEMANN WOLFRAM DR

IPC: C08F6/00 ,  C08F6/24

Abstract: The invention relates to a method for drying water-containing styrol polymerizates, in which the particles are treated with an aqueous salt solution.

公开(公告)号：DE19548311A1

公开(公告)日：1997-06-26

申请号：DE19548311

申请日：1995-12-22

Applicant: BASF AG

Inventor： LOEFFLER ACHIM DR ,  SCHERZER DIETRICH DR ,  BATSCHEIDER KARL-HEINZ ,  HAHN KLAUS DR ,  WITT MICHAEL DR ,  WAGNER BERNHARD DR ,  HUSEMANN WOLFRAM DR

IPC: C08J9/00 ,  C08J9/20 ,  C08L25/04 ,  C08F12/08 ,  C08J9/14

Abstract: In the preparation of expandable styrene polymer beads by polymerising styrene and optionally comonomers in aqueous suspension in the presence of suspension stabilisers and normal styrene-soluble polymerisation catalysts and with addition of a blowing agent, the novelty is that polymerisation is carried out in the presence of 0.1-1.5 mole electrolyte/l water.

公开(公告)号：AT154373T

公开(公告)日：1997-06-15

申请号：AT94103471

申请日：1994-03-08

Applicant: BASF AG

Inventor： WITT MICHAEL DR ,  SCHERZER DIETRICH DR ,  HAHN KLAUS DR ,  HENN ROLF DR ,  BACK WOLF-DIETER DR

IPC: C08J11/14 ,  A61L9/01 ,  C08J11/06 ,  C08J11/16

公开(公告)号：ES2088072T3

公开(公告)日：1996-08-01

申请号：ES92118664

申请日：1992-10-31

Applicant: BASF AG

Inventor： HAHN KLAUS DR ,  KAEMPFER KNUT DR ,  HINTZ HANS DR ,  SCHAEFER ANTHONY DR ,  RIETHUES MICHAEL DR ,  WITT MICHAEL DR

IPC: C08J9/12 ,  C08J9/00 ,  C08J9/16 ,  C08J9/18 ,  C08K5/00 ,  C08K5/05 ,  C08K5/06 ,  C08K5/17 ,  C08L25/04 ,  C08L71/00 ,  C08L71/02

Abstract: The invention relates to expandable styrene polymers containing a) a styrene polymer, b) and at least one carbon dioxide absorber, mixed or copolymerized with the above, in an amount of from 0.01 to 50% by weight, based on the sum of a) and b), and c) a blowing agent or blowing agent mixture in an amount of from 0.5 to 12% by weight, where the blowing agent or blowing agent mixture comprises c1) from 10 to 100% by weight of carbon dioxide and c2) from 0 to 90% by weight of at least one further blowing agent. The invention furthermore relates to the styrene polymers containing a carbon dioxide absorber, to the styrene polymer foams obtainable from the expandable styrene polymers, and to an improved process for impregnating styrene polymers with carbon dioxide-containing blowing agents or blowing agent mixtures.