Patent application number | Description | Published |
20080214750 | Method for Producing Water-Absorbing Polymers - The invention relates to processes for preparing water absorbing polymers by polymerization of a monomer solution comprising allyl acrylate and/or allyl alcohol, the solution comprising not more than 0.002% by weight of allyl acrylate and/or allyl alcohol, based on acrylic acid, to aqueous monomer solutions for producing water absorbing polymers, to water absorbing polymers, to processes for producing hygiene articles and also to hygiene articles. | 09-04-2008 |
20080227932 | Method for Producing Water-Absorbing Polymer Particles - A process for producing water-absorbing polymeric particles comprises conducting the polymerization in at least two parallel continuous polymerization reactors under substantially identical conditions and further processing the reaction products conjointly in at least one process step. | 09-18-2008 |
20090266747 | Method for Grading Water-Absorbent Polymer Particles - A process for classifying water-absorbing polymer beads, wherein the polymer beads are separated into n particle size fractions by means of at least n screens and n is an integer greater than 1. | 10-29-2009 |
20120001000 | Method for the Production of Water-Absorbing Polymer Particles - A process for producing water-absorbing polymer particles, comprising classification by means of a tumbler screening machine, wherein the tumbler screening machine used for classification is equipped with at least one ball knock cleaning system and entrained balls are removed outside the tumbler screening machine by means of a capture device. | 01-05-2012 |
20120309917 | Process for Continuously Producing Water-Absorbing Polymer Particles - A process for continuously producing water-absorbing polymer particles by polymerizing a monomer solution comprising acrylic acid and/or salts thereof, wherein the acrylic acid supplied has a dimeric acrylic acid content of at least 0.02% by weight and the dimeric acrylic acid content is kept essentially constant. | 12-06-2012 |
20120309920 | Process for Continuously Producing Water-Absorbing Polymer Particles - A process for continuously producing water-absorbing polymer particles, wherein the acrylic acid used to produce the polymer particles has a low purity. | 12-06-2012 |
20140328723 | PROCESS FOR CONTINUOUSLY PRODUCING WATER-ABSORBING POLYMER PARTICLES - A process for continuously producing water-absorbing polymer particles by polymerizing a monomer solution comprising acrylic acid and/or salts thereof, wherein the acrylic acid supplied has a dimeric acrylic acid content of at least 0.02% by weight and the dimeric acrylic acid content is kept essentially constant. | 11-06-2014 |
20150299347 | METHOD FOR PRODUCING SUPERABSORBERS BASED ON RENEWABLE RAW MATERIALS - A process for producing water-absorbing polymer particles, comprising the steps of thermal cracking of bionaphtha in the presence of steam, removing propene and at least some of the propane, gas phase oxidation to give acrylic acid and polymerization to give water-absorbing polymer particles. | 10-22-2015 |