公开(公告)号：BR0015680A

公开(公告)日：2002-08-06

申请号：BR0015680

申请日：2000-11-10

Applicant: BASF AG

Inventor： HEIDE WILFRIED ,  WICKEL STEFAN ,  DANIEL THOMAS ,  NILGES JOACHIM ,  HOFMANN JURGEN

IPC: B01J14/00 ,  B01J19/00 ,  B01J19/20 ,  C08F2/01 ,  C08F2/10 ,  C08F220/00

公开(公告)号：DE19955861A1

公开(公告)日：2001-05-23

申请号：DE19955861

申请日：1999-11-20

Applicant: BASF AG

Inventor： HEIDE WILFRIED ,  WICKEL STEFAN ,  DANIEL THOMAS ,  NILGES JOACHIM ,  HOFMANN JUERGEN

IPC: B01J14/00 ,  B01J19/00 ,  B01J19/20 ,  C08F2/01 ,  C08F2/10 ,  C08F220/00 ,  C08F220/06 ,  C08F220/56

Abstract: In a process for the continuous production of crosslinked, finely-divided gel polymers by co polymerisation of water-soluble mono-unsaturated monomers and poly-unsaturated comonomers in a multi-screw mixer-kneader, at least 5% of the heat of reaction is removed by evaporation of water, at least 25% with the product and the rest by cooling the reactor. A process for the continuous production of crosslinked, finely-divided gel polymers (I) involves the co polymerisation of (a) water-soluble mono-unsaturated monomers, (b) 0.001-5 mol% (based on a) monomers with at least two ethylenic double bonds and (c) 0-20 mol% water-insoluble mono-unsaturated monomers in 20-80 wt% aqueous solution in presence of initiators at 0-140 deg C, by feeding the monomer solution with the initiator and inert gas into a mixer-kneader with at least two parallel rotating shafts fitted with several kneading and transporting elements to move the materials through the mixer. In this process, at least 5% of the heat of reaction is removed by evaporation of water from the reaction mixture, at least 25% is removed with the product and the rest is removed by cooling the reactor walls.

公开(公告)号：ZA911671B

公开(公告)日：1992-11-25

申请号：ZA911671

申请日：1991-03-07

Applicant: BASF AG

Inventor： NIESSNER MANFRED ,  MANFRED NIESSNER ,  WICKEL STEFAN ,  STEFAN WICKEL ,  SCHNEIDER WALTER ,  WALTER SCHNEIDER ,  BECK JUERGEN ,  JUERGEN BECK ,  HARTMAN HEINRICH ,  HEINRICH HARTMAN ,  MEYER THOMAS ,  THOMAS MEYER

IPC: C08F2/08 ,  C08F2/10 ,  C08F2/44 ,  C08F ,  D21H

公开(公告)号：ZA9101671B

公开(公告)日：1992-11-25

申请号：ZA9101671

申请日：1991-03-07

Applicant: BASF AG

Inventor： NIESSNER MANFRED ,  MANFRED NIESSNER ,  WICKEL STEFAN ,  STEFAN WICKEL ,  SCHNEIDER WALTER ,  WALTER SCHNEIDER ,  BECK JUERGEN ,  JUERGEN BECK ,  HARTMAN HEINRICH ,  HEINRICH HARTMAN ,  MEYER THOMAS ,  THOMAS MEYER

IPC: C08F2/08 ,  C08F2/10 ,  C08F2/44 ,  C08F ,  D21H

CPC classification number: C08F2/10

公开(公告)号：CZ297784B6

公开(公告)日：2007-03-28

申请号：CZ20031084

申请日：2001-10-17

Applicant: BASF AG

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

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

Abstract: Resení se týká zasítovaného, vodou bobtnatelného polymeru, který obsahuje jako polymerované soucásti a) ve vode rozpustné, monoethylenove nenasycené monomery, a b) 0,001 do 5 % mol., vztazeno k monomerum a), kombinace b1) prvního zesítujícího cinidla s alespon dvema (meth)akrylesterovými cástmi v molekule a b2) druhého zesítujícího cinidla s alespon (meth)allyloxy cástmi v molekule, pricemz molární pomer b1) vzhledem k b2) se pohybuje v rozmezí od 0,7:1 do 10:1. Polymer podle predlozeného resení má vyrovnaný profil vlastností, predevsím pohltivosti, pevnosti gelu, absorpcní rychlosti a podíluextrahovatelných komponent a muze být s výhodou pripraven kontinuální metodou.

公开(公告)号：ES2256586T3

公开(公告)日：2006-07-16

申请号：ES02799748

申请日：2002-12-18

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  SCHRODER JURGEN ,  WICKEL STEFAN

IPC: C07C57/075 ,  A61L15/60 ,  C07C69/54 ,  C08F2/44 ,  C08F20/06 ,  C08L33/02 ,  A61L15/24

Abstract: Polímeros que forman hidrogel que absorben líquidos acuosos a base de polímeros que portan grupos ácidos, que contienen tocoferol.

公开(公告)号：AT329943T

公开(公告)日：2006-07-15

申请号：AT03785770

申请日：2003-12-08

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  MUELLER-ENGEL KLAUS JOACHIM ,  WICKEL STEFAN

IPC: A61L15/60 ,  C08F8/00 ,  C08F20/06 ,  C08J3/12 ,  C07C51/43

Abstract: Preparation of low odor hydrogel-forming polymerisate based on acrylic acid involving preparation of a polymeric hydrogel by radical polymerization of acrylic acid containing monomer in an aqueous polymerization medium and conversion of the hydrogel into a particulate hydrogel or hydrogel forming powder, and treatment of these with a crosslinking substance having at least two latent functional groups reactive to the polymerisate carboxyl groups is new. A process for preparation of low odor hydrogel-forming polymerisate based on acrylic acid including the steps; (a) preparation of a polymeric hydrogel by radical polymerization of at least 50 wt.% of acrylic acid containing monomer composition in an aqueous polymerization medium and conversion of the hydrogel into a particulate hydrogel or a hydrogel forming powder, and optionally treatment of these with a crosslinking substance having at least two latent functional groups reactive to the polymerisate carboxyl groups, where in step (a) the acrylic acid contains at least 500 ppm of acrylic acid oligomer.

公开(公告)号：BR0316864A

公开(公告)日：2005-10-18

申请号：BR0316864

申请日：2003-12-08

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  MUELLER-ENGEL KLAUS JOACHIM ,  WICKEL STEFAN

IPC: A61L15/60 ,  C08F8/00 ,  C08F20/06 ,  C08J3/12 ,  C07C51/43

Abstract: Preparation of low odor hydrogel-forming polymerisate based on acrylic acid involving preparation of a polymeric hydrogel by radical polymerization of acrylic acid containing monomer in an aqueous polymerization medium and conversion of the hydrogel into a particulate hydrogel or hydrogel forming powder, and treatment of these with a crosslinking substance having at least two latent functional groups reactive to the polymerisate carboxyl groups is new. A process for preparation of low odor hydrogel-forming polymerisate based on acrylic acid including the steps; (a) preparation of a polymeric hydrogel by radical polymerization of at least 50 wt.% of acrylic acid containing monomer composition in an aqueous polymerization medium and conversion of the hydrogel into a particulate hydrogel or a hydrogel forming powder, and optionally treatment of these with a crosslinking substance having at least two latent functional groups reactive to the polymerisate carboxyl groups, where in step (a) the acrylic acid contains at least 500 ppm of acrylic acid oligomer.

公开(公告)号：ZA200303812B

公开(公告)日：2004-08-13

申请号：ZA200303812

申请日：2003-05-16

Applicant: BASF AG

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

IPC: C08F2/01 ,  B01J19/20 ,  C08F2/04 ,  C08F2/10 ,  C08F8/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/56 ,  C08F290/06 ,  C08F

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：CA2507548A1

公开(公告)日：2004-06-24

申请号：CA2507548

申请日：2003-12-08

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  MUELLER-ENGEL KLAUS JOACHIM ,  WICKEL STEFAN

IPC: A61L15/60 ,  C08F8/00 ,  C08F20/06 ,  C08J3/12 ,  C07C51/43

Abstract: The invention relates to a method for producing low-odor, hydrogel-forming polymers based on acrylic acid. Said method comprises the following steps: a ) a polymeric hydrogel is produced by radically polymerizing a monomer composition containing at least 50 percent by weight of acrylic acid in an aqueous polymerizing medium, and the hydrogel is transformed into a particle - shaped hydrogel or a powder forming a hydrogel; and optionally b) the partic le- shaped hydrogel or the powder forming a hydrogel is treated with a crosslinking substance comprising at least two functional groups that are reactive towards the carboxyl groups of the polymer, optionally in a latent form. The inventive method is characterized by the fact that the acrylic aci d used in step a) comprises a total amount of oligomers of less than 500 ppm, preferably no more than 400 ppm, and especially no more than 300 ppm, ppm referring to proportions by weight relative to the acrylic acid. Advantageously, the proportion of triacrylic acid (compound I in which x = 2 ) and higher oligomers of the acrylic acid amounts to less than 100 ppm, especially less than 50 ppm, and particularly less than 10 ppm.