Basf Aktiengesellschaft

Basf Se Corporation

Amcol International Corporation

Bask Aktiengesellschaft

Basfaktiengesellschaft

Michael A Mitchell

Thomas W Beihoffer

Norbert Herfert

Anthony S Tomlin

Mark Anderson

Thomas Daniel

David Eckert

Xiaomin Zhang

Uwe Stueven

Jerald W Darlington, Jr

Marco Krüger

Stefan Blei

Karin Flore

Michael M Azad

Leticia L Trzupek

Matthias Weismantel

Ulrich Riegel

Stephan Bauer

Rainer Dobrawa

Katrin Baumann

Christophe Bauduin

Francisco Javier Lopez Villanueva

Markus Braun

Thomas Gieger

Jürgen Freiberg

Birgit Reinhard

Guy T Woodrum

Peter W Carrico

John A Henderson

Katarzyna Dobrosielska-Oura

Samantha J Evans

Friedrich Engelhardt

Ma-Ikay Miatudila

Ralph Spindler

James C Robinson

Kathleen Goebel

Patricia D Brown

William G-j Chiang

Raffat S Sultana

Kimberly A Rausch

Leticia L Lobo

Rumyana Panayotova

Ming Vang

Jim Robinson

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 fluid-absorbent article having an upper liquid-pervious layer, a lower liquid-impervious layer, a fluid-absorbent core between the layer and the layer, containing from 0 to 20% by weight fibrous material and from 80 to 100% by weight of a water-absorbent polymer material, based on the sum of water-absorbent polymer material and fibrous material. The fluid absorbent article has a first intake time of 15 seconds or less by the hanging U-shape test (HUS).

Fluid-absorbent article

The present invention relates to ultrathin fluid-absorbent cores comprising a substrate layer, water-absorbent polymer particles and an adhesive, wherein the water-absorbent polymer particles comprise a basic salt of a polyvalent metal cation and a monovalent carboxylic acid anion on the surface and the wet SAP shake out of water-absorbent polymer particles out of the fluid-absorbent core is less than 10% by weight.

Ultrathin fluid-absorbent cores

A process for producing water-absorbing polymer particles with high free swell rate and high permeability by polymerization of an aqueous monomer solution or suspension to give an aqueous polymer gel, wherein a thermal blowing agent essentially free of inorganic acid anions is mixed into the polymer gel, and subsequent thermal drying of the polymer gel.

Water-absorbing polymer particles with high free swell rate and high permeability

The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase and flowing the gas cocurrent through the polymerization chamber, wherein the temperature of the gas leaving the polymerization chamber is 130&#xb0; C. or less, the gas velocity inside the polymerization chamber is at least 0.5 m/s, and the droplets are generated by using a droplet plate having a multitude of bores.

Water-absorbent polymer particles

The present invention relates to ultrathin fluid-absorbent cores comprising a substrate layer, multicomponent superabsorbent particles and an adhesive, wherein the wet SAP shake-out of superabsorbent particles out of the fluid-absorbent core is less than 10% by weight.

Water-absorbent porous polymer particles having specific sphericity and high bulk density

The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase and flowing the gas cocurrent through the polymerization chamber, which comprises thermal postcrosslinking in the presence of steam.

Process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution

A continuous sheet having a combination of acidic and basic water-absorbing resin particles that are essentially not neutralized and can be continuously manufactured on conventional papermaking apparatus, using a wet, dry, or wet-dry process to manufacture a water-absorbent sheet-like substrate containing 50%-100% by weight of the combination of acidic and basic water-absorbent particles is disclosed.

Continuous manufacturing of superabsorbent/ion exchange sheet material

A flexible absorbent sheet material containing an acidic water-absorbing resin, a basic water-absorbing resin, and a plasticizer, and its method of manufacture, are disclosed. The sheets contain about 60% to 100% by weight of the acidic and basic water-absorbent resin and plasticizer. The absorbent sheets have unexpected flexibility and structural integrity, while exhibiting exceptional water absorption and retention properties.

Plasticized superabsorbent polymer sheets and use thereof in hygienic articles

A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.

Color-stable superabsorbent polymer composition

An improved method of manufacturing surface-crosslinked superabsorbent polymer particles is disclosed. The superabsorbent polymer particles are surface crosslinked using about 20 to about 35 wt % of 1,3-propanediol as a cosolvent in a surface-crosslinking step. The use of 1,3-propanediol as a cosolvent reduces the amount of surface-crosslinking agent required to adequately surface crosslink the superabsorbent polymer, and reduces or eliminates the fouling of process equipment attributed to previous cosolvents used in a surface crosslinking step.

Method of manufacturing superabsorbent polymers

The invention concerns superabsorbent particles with a shell, wherein said shell comprises a cationic polymer crosslinked by the addition of crosslinker and adhered to hydrogel-forming polymer obtainable by applying a coating solution, containing both a cationic polymer and crosslinker, to hydrogel-forming polymer having a residual water content of less than 10 w %, their production and use.

Crosslinked polyamine coating on superabsorbent hydrogels

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Waxhaw, NC, United States of America

Michael A Mitchell