Water-absorbing polymer particles having a high swelling rate and high permeability

• Main Authors: BRAUN MARKUS, RIEGEL ULRICH, MITCHELL MICHAEL, GIEGER THOMAS, WEISMANTEL MATTHIAS
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2014
• Subjects: CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMISTRY; COMPOSITIONS BASED THEREON; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; HUMAN NECESSITIES; HYGIENE; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a method for producing water-absorbing polymer particles having a high swelling rate and high permeability by polymerizing an aqueous monomer solution or monomer suspension to form an aqueous polymer gel, wherein a thermal blowing agent, which is substantially free of inorganic acid anions, is mixed into the polymer gel, and subsequently thermally drying the polymer gel.