Basf Aktiengesellschaft

Hoechst Celanese Corporation

Basf Se Corporation

Guy T Woodrum

Norbert Herfert

Michael A Mitchell

Michael M Azad

Patricia D Brown

Fritz Engelhardt

Martin Wendker

Ma-Ikay Miatudila

Mariola Wanior

Hermann Josef Feise

Peter W Carrico

Hanno Rüdiger Wolf

R&uuml;diger Funk

Douglas R Chambers

James C Robinson

William G-j Chiang

Thomas H Majette

Bill Chiang

Jay Gregory Otten

Christopher G Utz

A superabsorbent having superior permeability and conveying properties comprises a permeability enhancing agent and a cohesion control agent and has a free swell gel bed permeability of at least 15 Darcies and a Hausner ratio in the range of 1.18 to 1.34.

Superabsorbents having superior permeability and conveying properties

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

Superabsorbent polymer (SAP) particels containing a clay are disclosed. The clay is added to an SAP hydrogel prior to SAP neutralization to provide particles having improved fluid acquisition rates and an improved permeability of a fluid through the swollen SAP-clay particles. Diaper cores and absorbent articles containing the SAP-clay particles also are disclosed.

Superabsorbent polymers and method of manufacturing the same

Crosslinked, hydrophilic, highly swellable hydrogels, production thereof and use thereof

A surface crosslinked superabsorbent polymer composition, a process for its preparation and articles made therefrom wherein said superabsorbent composition is prepared by surface crosslinking the polymerization product of a carboxyl or carboxylate group containing monomer with a crosslinker solution comprising water, C.sub.3 -C.sub.6 diol and a crosslinking compound having at least two functional reactive groups with the carboxyl or carboxylate groups of said polymerization product.

Superabsorbent polymers and products therefrom

This invention is a method for converting fine particles of superabsorbent polymers into larger particles. The invention is primarily directed to aqueous solution processes for preparing superabsorbent polymers. In such aqueous solution polymerization methods, the polymerization reaction product is a high viscosity gel which is dried and ground into particles. In this grinding step, a portion of the product is produced as undesired fine particles having poor absorbency and poor fabrication properties; i.e. they 'gel block' and dust. According to the invention, fine superabsorbent polymer particles (up to about 3 parts) are mixed with the high viscosity reaction product gel (100 parts) containing about 20 parts by weight of superabsorbent polymer and water (5 parts per part of recycled particles) to form a mixture with improved rheological properties. The resulting mixture can be processed at a higher rate than a reaction product gel of equal solids content which results in a higher product yield and increased productivity.

Process for the conversion of fine superabsorbent polymer particles into

Moisture absorbing pellets useful as animal litter are made from a blend of bentonite clay and a solid water-swellable but water-insoluble organic polymeric hydrocolloid.

Pellets of clay and superabsorbent polymer

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Chesapeake, VA, United States of America

Guy T Woodrum