Abstract:
A process for preparing water-absorbing polymeric foams by polymerization of a foamed aqueous monomer solution or suspension, comprising an ethylenically unsaturated monomer which bears acid groups and may be at least partly neutralized, a crosslinker, a photoinitiator and a surfactant.
Abstract:
A process for preparing water-absorbing polymer particles, comprising polymerization of a foamed monomer solution or suspension, drying, grinding and classification.
Abstract:
A process for preparing mechanically stabilized polyazoles, comprising the following steps: I) treating at least one polyazole having at least one amino group in a repeat unit with a solution comprising (i) at least one strong acid and (ii) at least one stabilizing reagent, the total content of stabilizing reagents in the solution being in the range from 0.01 to 30% by weight, II) performing the stabilization reaction directly and/or in a subsequent processing step by heating to a temperature greater than 25° C., using at least one high-functionality polyether as the stabilizing reagent. The polyazoles thus obtainable are notable especially for a high conductivity and a very good mechanical stability. They are therefore especially suitable for applications in fuel cells.
Abstract:
A process for producing surface postcrosslinked water-absorbing polymer particles, wherein the water-absorbing polymer particles are coated, before, during or after the surface postcrosslinking, with at least one basic salt of a trivalent metal cation and a monovalent carboxylic acid anion.
Abstract:
A feminine hygiene absorbent article comprising water-absorbing polymer particles, obtainable by polymerization of a foamed monomer solution or suspension, drying, grinding and classification.
Abstract:
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° 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.
Abstract:
The use of water-absorbing polymer particles for absorbing blood and/or menses, the water-absorbing polymer particles being obtainable by polymerizing a foamed monomer solution or suspension, drying the polymeric foam and grinding the dried foam.
Abstract:
A process for preparing water-absorbing polymer particles, comprising polymerization of a foamed monomer solution or suspension, drying, grinding and classification.
Abstract:
The use of water-absorbing polymer particles for dewatering feces, the water-absorbing polymer particles being obtainable by polymerizing a foamed monomer solution or suspension, drying the polymeric foam and grinding the dried foam.
Abstract:
The present invention relates to a heat storage composition comprising 60-98% by weight of sodium sulfate decahydrate and 1-10% by weight of one or more superabsorbents 1-10% by weight of one or more nucleators and 0-20% by weight of one or more water-soluble salts, based in each case on the heat storage composition, said superabsorbent comprising, in polymerized form, a) at least 50 mol %, based on the superabsorbent, of one or more monoethylenically unsaturated monomers comprising acid groups, the degree of neutralization of the monoethylenically unsaturated monomers comprising acid groups being 15 to 85 mol %, and b) 0.015 to 0.1 mol %, based on the total amount of monomers, of at least one crosslinker, to a process for production thereof and to the use thereof as a heat-storing building material and as a heat storage element for motor vehicles, walls of transport vessels or other heat storage vessels.