公开(公告)号：CA2346492A1

公开(公告)日：2000-05-04

申请号：CA2346492

申请日：1999-10-14

Applicant: BASF AG

Inventor： SCHLIWA RUDOLF ,  STUVEN UWE ,  DENTLER JOACHIM ,  KLOTZSCHE HELMUT ,  HERFERT NORBERT

IPC: B01J20/26 ,  B01J20/30 ,  B29B13/06 ,  C08F6/00 ,  C08J3/00 ,  C08J3/12 ,  F26B1/00

Abstract: The present invention relates to a complete drying method for hydrogels, whereby the following steps are carried out successively: a) the hydrogels a re contact dried or dried by convection, b) the hydrogels are pre-crushed, c) t he pre-crushed hydrogels are ground by means of a coarse crushing mill or a crushing roller mill, d) the damp elastic hydrogel particles are separated, e) the damp elastic hydrogel particles are finally dried.

公开(公告)号：CA2345727A1

公开(公告)日：2000-04-20

申请号：CA2345727

申请日：1999-09-28

Applicant: BASF AG

Inventor： STUVEN UWE ,  ENGELHARDT FRITZ ,  SCHLIWA RUDOLF ,  DENTLER JOACHIM ,  HERFERT NORBERT

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08F8/44 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/00 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08J3/12 ,  C09K3/00

Abstract: The invention relates to a method for producing water-swellable hydrophilic polymers by neutralising the acid hydrogel with a degree of neutralisation o f 0 40 mol. % to a final degree of neutralisation of 60 85 mol. % by mixing wi th a neutralising agent in an opener using a system consisting of a screw, a rotating blade, a restricted flow area and a breaker plate, the capacity of the opener being 1000 to 6000 Wh/m3, the hydrogel being guided through an ar ea with an energy dissipation density of 400 to 800 W/l mixing volume, the average residence time of the hydrogel in the opener being 5 to 30 seconds, and the free perforated surface of the breaker plate being 20 to 40 %.

公开(公告)号：CA2319457A1

公开(公告)日：1999-08-26

申请号：CA2319457

申请日：1999-02-19

Applicant: BASF AG

Inventor： FRENZ VOLKER ,  FUNK RUDIGER ,  ENGELHARDT FRIEDRICH ,  STUVEN UWE ,  DANIEL THOMAS

IPC: A61L15/00 ,  A61L15/60 ,  C08F8/40 ,  C08J3/24 ,  D06M15/263

Abstract: The invention relates to a method for the surface secondary cross-linking of water-absorbent polymers, according to which the polymer is sprayed with a solution for surface secondary cross-linking. As cross-linking agent said solution contains phosphoric acid esters of the formula (1) or (2), where X is OH or NH2 and R is C1-C12 alkylene, or a mixture of such esters dissolved in an inert solvent. The moist product during or after spraying is subjected to secondary cross-linking and dried by raising the temperature to 50-250 ~C. The invention also relates to water-absorbent polymers obtainable in accordance with the above method and to their use in hygiene articles, packing materials and non-woven materials.

公开(公告)号：ES2172310T3

公开(公告)日：2002-09-16

申请号：ES99910244

申请日：1999-02-19

Applicant: BASF AG

Inventor： FUNK RUDIGER ,  FRENZ VOLKER ,  STUVEN UWE ,  ENGELHARDT FRITZ ,  DANIEL THOMAS

IPC: A61F13/15 ,  B01J20/26 ,  C08F8/42 ,  C08J3/24 ,  C08K5/10 ,  C08L101/14

公开(公告)号：CZ20031084A3

公开(公告)日：2003-09-17

申请号：CZ20031084

申请日：2001-10-17

Applicant: BASF AG

Inventor： HEIDE WILFRIED ,  WICKEL STEFAN ,  DANIEL THOMAS ,  STUVEN UWE

IPC: C08F2/01 ,  B01J19/20 ,  C08F2/04 ,  C08F2/10 ,  C08F8/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/56 ,  C08F290/06

Abstract: The invention relates to a cross-linked, water-swellable polymer that contains polymerized into it moieties of a) water-soluble, monoethylenically unsaturated monomers, and b) 0.001 to 5 mole % based on the monomers a) of a cross-linking combination, b1) a first cross-linking agent with at least two (meth)acrylic ester moieties in the molecule and b2) a second cross-linking agent with at least two (meth)allyloxy moieties in the molecule, the molar ratio of b1) to b2) ranging from 0.7:1 to 10:1. The polymer according to the invention has a balanced property profile as regards absorptivity, gel strength, absorption speed and extractable componenents and can be advantageously produced by a continuous method.

公开(公告)号：AU1055302A

公开(公告)日：2002-04-29

申请号：AU1055302

申请日：2001-10-17

Applicant: BASF AG

Inventor： HEIDE WILFRIED ,  WICKEL STEFAN ,  DANIEL THOMAS ,  STUVEN UWE

IPC: C08F2/01 ,  B01J19/20 ,  C08F2/04 ,  C08F2/10 ,  C08F8/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/56 ,  C08F290/06

Abstract: The invention relates to a cross-linked, water-swellable polymer that contains polymerized into it moieties of a) water-soluble, monoethylenically unsaturated monomers, and b) 0.001 to 5 mole % based on the monomers a) of a cross-linking combination, b1) a first cross-linking agent with at least two (meth)acrylic ester moieties in the molecule and b2) a second cross-linking agent with at least two (meth)allyloxy moieties in the molecule, the molar ratio of b1) to b2) ranging from 0.7:1 to 10:1. The polymer according to the invention has a balanced property profile as regards absorptivity, gel strength, absorption speed and extractable componenents and can be advantageously produced by a continuous method.

公开(公告)号：ES2271287T3

公开(公告)日：2007-04-16

申请号：ES02745400

申请日：2002-06-21

Applicant: BASF AG

Inventor： FUNK RUDIGER ,  HERFERT NORBERT ,  WANIOR MARIOLA ,  STUVEN UWE ,  BECK MARTIN

IPC: C08F20/06 ,  C08F220/04 ,  A61L15/00 ,  D04H1/40 ,  D06M15/263

Abstract: Polímeros formadores de hidrogeles absorbentes de fluidos acuosos, teniendo los polímeros un índice de absorbencia de pH pHAI, que se calcula como sigue pHAI = A pH u (AUL0.7 psi + CRC) con A pH = 7-pH del producto correspondiente AUL0.7 psi corresponde a la absorción a presión de 0.7 psi CRC corresponde a la capacidad de retención centrífuga de al menos 80, y con un pH no superior a 5, 7.

公开(公告)号：ES2164124T3

公开(公告)日：2002-02-16

申请号：ES95109493

申请日：1995-06-20

Applicant: BASF AG

Inventor： ENGELHARDT FRITZ DR ,  HERFERT NORBERT DR ,  STUVEN UWE ,  RIEGEL ULRICH ,  FUNK RUDIGER DR ,  SEIP DETLEV DR

IPC: A61F13/53 ,  A61F13/15 ,  A61F13/49 ,  B01D15/00 ,  B01J20/26 ,  C08G59/40 ,  C08J3/12 ,  C08J7/04 ,  C08L1/00 ,  C08L1/02 ,  C08L3/00 ,  C08L3/04 ,  C08L33/04 ,  C08L33/08 ,  C08L33/10 ,  C08L51/00 ,  C08L59/00 ,  C08L63/00 ,  C08L67/00 ,  C08L67/02 ,  C08L69/00 ,  C08L75/00 ,  C08L75/02 ,  C08L75/04 ,  C08L83/02 ,  C08L83/04 ,  C08L101/00

公开(公告)号：CA2319786A1

公开(公告)日：1999-08-26

申请号：CA2319786

申请日：1999-02-18

Applicant: BASF AG

Inventor： FUNK RUDIGER ,  DANIEL THOMAS ,  FRENZ VOLKER ,  STUVEN UWE ,  ENGELHARDT FRIEDRICH

IPC: A61L15/00 ,  A61L15/60 ,  C07F7/07 ,  C08F8/42 ,  C08G85/00 ,  C08J3/24

Abstract: The invention relates to a method for surface cross-linking particles of superabsorbent polymers, characterized by the use of compounds of formula (1) as cross-linking agents, where R and R' independently of each other are hydrogen or C1-C6 alkyl.

公开(公告)号：ES2234902T3

公开(公告)日：2005-07-01

申请号：ES01978432

申请日：2001-10-17

Applicant: BASF AG

Inventor： HEIDE WILFRIED ,  WICKEL STEFAN ,  DANIEL THOMAS ,  STUVEN UWE

IPC: C08F2/01 ,  B01J19/20 ,  C08F2/04 ,  C08F2/10 ,  C08F8/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/56 ,  C08F290/06

Abstract: Polímero reticulado hinchable en agua que contiene unidades mono-polimerizadas de: a) monómeros solubles en agua monoetilénicamente insaturados y b) 0, 001 a 5% en moles referido a los monómeros a) de una combinación de agente reticulador b1) de un primer agente reticulador con al menos dos unidades de éster (met)acrílico en la molécula y b2) de un segundo agente reticulador con al menos dos unidades (met)aliloxi en la molécula, en el que la relación molar de b1) a b2) se encuentra en el intervalo de 0, 7:1 a 10:1.