Basf Se Corporation

Basf Aktiengesellschaft

The Procter Gamble Company

Basf Corporation

Clariant Corporation

Daiso Co., Ltd.

Bostik, Inc.

Thomas Daniel

Ulrich Riegel

Mark Elliott

Norbert Herfert

Matthias Weismantel

Dieter Hermeling

Christophe Bauduin

Reinhold Schwalm

Uwe Stueven

Katrin Baumann

Stefan Bruhns

Stephan Bauer

Volker Braig

Fritz Engelhardt

Rüdiger Funk

Michael A Mitchell

Klemens Massonne

Marco Krüger

Stefan Blei

Frank Dietsche

Rainer Dobrawa

Thomas Jaworek

Francisco Javier Lopez Villanueva

Mattias Schmidt

Renae Dianna Fossum

Antje Ziemer

Klaus Joachim Mueller-Engel

Reinhold J Leyrer

Axel Meyer

Karl Haeberle

Jean-Philippe Marie Autran

Wilfried Heide

Jürgen Schröder

Dominicus Van Esbroeck

Karl J Possemiers

Annemarie Hillebrecht

Friedrich Engelhardt

Karl-Heinz Schumacher

Otto Machhammer

Rainer Dyllick-Brenzinger

Xiaomin Zhang

Stephen Allen Goldman

Thomas Pfeiffer

Tina Mark

Volker Frenz

Jürgen Freiberg

Birgit Reinhard

Axel Jentzsch

Markus Toennessen

Katarzyna Dobrosielska-Oura

Erich Lutz

Stefan Wickel

Kai Michael Exner

Karin Flore

Kristine Hartnagel

Rupert Konradi

Thomas Gieger

Rudolf Schliwa

Franz Niklaus Windlin

Andreas Brockmeyer

Yvonne Hagen

Asif Karim

Herbert Platsch

Ralf Fink

Michaela Monika Czupik

Karl Haberle

Stefan Molter

Veit Stegmann

Uwe Stuven

John Christian Schmitt

R&uuml;diger Funk

Nathaniel Troy Greene

Bettina Sobotka

Michelle Morano

Robin Lynn McKiernan

Oliver Koch

Achille Di Cintio

Markus Christian Biel

Rainer Koeniger

Daniel Pfeiffer

Manfred Heilig

Jean-Francois Chartrel

J&uuml;rgen Hofmann

Michael De Marco

Yasumi Shimizu

Jörg Belack

Frank Huetten

Markus Ottenbacher

Hanno Rüdiger Wolf

Stephan Altmann

Uwe Stüven

Karl Häberle

Anna Kowalski

Gustav Remmel

Juergen Freiberg

Stefanie Herzog

Joachim Nilges

Tohru Matsutomi

Kathleen Goebel

Renate Wuestefeld

A method of measuring indices in superabsorbents, by initially charging excess aqueous solution or dispersion, swelling the superabsorbent in the initially charged aqueous solution or dispersion while stirring, dissolving or dispersing a component A in the aqueous solution or dispersion, measuring the enrichment of component A in the aqueous solution or dispersion during the swelling of the superabsorbent, using the enrichment of component A in the aqueous solution or dispersion to measure the time-dependent swelling characteristics and using these to determine the swelling constant k or the characteristic swell time τ, the index being dependent on the permeability of the superabsorbent, and ascertaining the index by means of a correlation measured beforehand between swelling constant k and index or characteristic swell time τ and index.

Method for measuring the permeability of superabsorbers

A process for producing superabsorbents, comprising polymerization of a monomer solution and thermal surface postcrosslinking, wherein the monomer solution comprises at least 0.75% by weight of a hydroxyphosphonic acid or salts thereof, calculated on the basis of the total amount of monomer used, and at least 0.09% by weight of aluminum cations, calculated on the basis of the total amount of polymer particles used, is added to the polymer particles before, during or after the thermal surface postcrosslinking.

Method for the production of superabsorbers

The invention relates to a process for producing long-term color stable superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises at least 0.01% by weight of 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof and at least 0.01% by weight of 2-hydroxy-2-sulfonatoacetic acid or a salt thereof.

Process for producing superabsorbents

A fluid-absorbent article includes an upper liquid-pervious layer (A), a lower liquid-impervious layer (B), a fluid-absorbent core (C) between (A) and (B) including at least 60% by weight of non-surface postcrosslinked fluid-absorbent polymer particles and not more than 40% by weight of fibrous material, based on the sum of non-surface postcrosslinked fluid-absorbent polymer particles and fibrous material. An acquisition-distribution layer (D) between (A) and (C) includes at least 90% by weight of synthetic fibers and not more than 10% by weight of cellulose based fibers, based on the sum of synthetic fibers and cellulose based fibers. The basis weight of the acquisition-distribution layer (D) is at least 70 gsm. The fluid-absorbent polymer particles have a saline flow conductivity (SFC) of less than 5×10cms/g and an AUHL of less than 15 g/g. Preferably the acquisition-distribution layer (D) is a non-woven web including a three dimensional network of fibers.

Fluid-absorbent article

A highly permeable superabsorbent is prepared by a process comprising polymerizing an aqueous monomer solution comprising

Permeable superabsorbent and process for production thereof

Provided herein are fluid-absorbent articles, fluid absorbent cores, and fluid-absorbent mixtures with improved properties, especially rewet performance and liquid acquisition. The fluid-absorbent article includes (A) an upper liquid-pervious sheet, (B) a lower liquid-impervious sheet, (C) a fluid-absorbent core including from 60 to 20% by weight fibrous material and from 40 to 80% by weight of at least a first type of water-absorbent polymer particles, (G) and at least a second type of water-absorbent polymer particles (H) based on the sum of water-absorbent polymer particles and fibrous material, (D) an optional acquisition-distribution layer (D) between (A) and (C), (F) other optional components, wherein the first type of water absorbent polymer particles (G) of the fluid-absorbent core (C) have a SFC of at least 20×10cm·s/g, and wherein the at least second type of water-absorbent polymer particles (H) of the fluid-absorbent core have a sphericity of at least 0.80.

A method of pneumatically conveying superabsorbent particles, wherein the superabsorbent particles have been admixed with an aqueous wax dispersion prior to the pneumatic conveying, the wax has a glass transition temperature of at least 65° C. and, based on the untreated superabsorbent particles, from 0.020% to 0.20% by weight of wax has been used.

Method for the pneumatic delivery of superabsorbent particles

In a method of measuring parameters of superabsorbents, the absorption capacity of superabsorbents is determined under pressure, by reducing the pressure applied to a sample of the superabsorbent stepwise and determining the absorption capacity at each pressure. In addition, the rise in absorption capacity after a reduction in pressure is measured as a function of time and this is used to calculate the swelling constant k or the characteristic swelling time τ. Swelling constant or characteristic swelling time or the magnitude of the difference in absorption capacity at two different pressures are used to determine further parameters of the superabsorbent.

Method for determining characteristics of super-absorbents

In an improved superabsorbent complexed with aluminum ions, the aluminum ions are applied in the form of an aqueous solution comprising aluminum ions, which has the feature that it comprises aluminum ions in a proportion within the range of 0.5%-15% by weight (converted if appropriate to Al), based on the total mass of the solution, and further comprises anions of lactic acid (lactate ions) and phosphoric acid (phosphate ions), where the molar proportion of the lactate ions is within the range of 0.01-2.99 times the molar amount of Aland the molar proportion of the phosphate ions is within the range of 0.01-2.99 times the molar amount of Al.

Superabsorbent complexed with aluminum ions

A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 100 to 190&#xb0; C.

Method for producing water-absorbing polymer particles by suspension polymerization

Superabsorbent mixtures M comprising at least 70% by weight of superabsorbent A having a liquid absorption of 20 g/g (T20) of less than 300 s and/or a volumetric liquid absorption under pressure 0.3 psi (2.07 kPa) (VAUL) with a &#x3c4; value of less than 400 s, and at least 5% by weight of superabsorbent B having a centrifuge retention capacity (CRC) of at least 30 g/g.

Superabsorber mixtures

A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the agglomerated base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 100 to 190&#xb0; C.

The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles by coating of water-absorbent polymer particles having a content of residual monomers in the range from 0.03 to 15% by weight with at least one surface-postcrosslinker and thermal surface-postcrosslinking at temperatures in the range from 100 to 180&#xb0; C.

Process for producing surface-postcrosslinked water-absorbent polymer particles

A process for agglomerating superabsorbent particles, wherein polymer particles having a particle size of 250 &#x3bc;m or less are dispersed in a hydrophobic organic solvent, the dispersed polymer particles are mixed with an aqueous monomer solution, the amount of unneutralized monomer applied with the monomer solution being from 0.5% to 80% by weight, based on the dispersed polymer particles, and the monomer solution is polymerized.

Method for producing super absorber particles

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Waldsee, Germany

Thomas Daniel