公开(公告)号：BRPI0713605A2

公开(公告)日：2012-11-06

申请号：BRPI0713605

申请日：2007-06-13

Applicant: BASF SE

Inventor： DIENES CHRISTIAN ,  KRUEGER MARCO ,  MUESSIG STEFAN ,  ERBES JOERG ,  STAMMER ACHIM ,  WEBER MARTIN ,  WABMER KARL-HEINZ ,  LANGE GERHARD

IPC: C08G75/23 ,  C08G75/20

Abstract: The present invention relates to a process for the preparation of polysulfones having a yellowness index according to DIN 6167 of less than 19 and polyether sulfones having a yellowness index according to DIN 6167 of less than 30, wherein the polymerization is carried out in basic, aprotic solvents with the use of a positively conveying stirrer passing close to the wall. The present invention also relates to the polyether sulfones and polysulfones obtainable for the first time by this process and to the use of such polymers for the production of moldings, films, membranes and foams.

公开(公告)号：BRPI0618534A2

公开(公告)日：2012-05-08

申请号：BRPI0618534

申请日：2006-11-08

Applicant: BASF SE

Inventor： GUNTHERBERG NORBERT ,  HOFMANN JUERGEN ,  WABMER KARL-HEINZ ,  LOTH WOLFGANG ,  SCHIERHOLZ JEANS-UWE ,  SCHMAUS PAULUS ,  MOURS MARIAN ,  SCHADE CHRISTIAN ,  ITTEMANN PETER ,  HEINEN HARTMUT ,  CZAUDERNA BERNHARD ,  SAUER MICHAEL ,  BARDON RAINER ,  KRUEGER MARCO

IPC: B01D3/06 ,  B01D19/00 ,  B29B7/84 ,  C08F6/00 ,  C08L25/08

Abstract: The invention relates to a tube bundle heat exchanger (R) for removing dissolved substances from a polymer solution (P) by degassing, having a bundle of tubes (R) which are arranged parallel to one another and vertically and are fastened at both ends in each case in one tube plate (B), and having a degassing region below the lower tube plate (B), having an insert (1) in each tube (R), which insert (1) narrows the free throughflow cross section through the tube (R), and wherein the polymer solution (P) is supplied into the tubes (R) in a single-phase liquid state, and having a casing space around the tubes (R) which is traversed by a heat carrier, wherein the degassing takes place by means of a pressure drop between the inlet pressure of the polymer solution (P) in the tube bundle heat exchanger (R) and the degassing region, characterized in that each insert (1) is designed in such a way as to generate a pressure step between the inlet pressure and the pressure in the degassing region, by means of which pressure step a predefined low residual content of dissolved substances is obtained in the degassed polymer, and an additional heat input which is necessary for this purpose takes place via the heat carrier into the single-phase liquid polymer solution (P).

公开(公告)号：IN391CH2009A

公开(公告)日：2009-06-05

申请号：IN391CH2009

申请日：2009-01-21

Applicant: BASF SE

Inventor： DIENES CHRISTIAN ,  KRUEGER MARCO ,  MUESSIG STEFAN ,  ERBES JOERG ,  STAMMER ACHIM ,  WEBER MARTIN ,  WABMER KARL-HEINZ ,  LANGE GERHARD

IPC: C08G75/20

Abstract: The present invention relates to a process for the preparation of polysulfones having a yellowness index according to DIN 6167 of less than 19 and polyether sulfones having a yellowness index according to DIN 6167 of less than 30, wherein the polymerization is carried out in basic, aprotic solvents with the use of a positively conveying stirrer passing close to the wall. The present invention also relates to the polyether sulfones and polysulfones obtainable for the first time by this process and to the use of such polymers for the production of moldings, films, membranes and foams.