摘要:
Re-moisturised, surface-crosslinked superabsorbents are produced using a process that comprises the steps of contacting a superabsorbent base polymer with an organic crosslinker and a polyvalent metal salt solution in the presence of an alcohol, heat-treating to produce a surface-crosslinked, dry superabsorbent and re-moisturising the surface-crosslinked dry superabsorbent.
摘要:
Superabsorbent polymer particles having superior gel integrity, absorption capacity, and permeability are disclosed. A method of producing the superabsorbent polymer particles by applying a polyamine coating to the particles also is disclosed.
摘要:
A process for preparing water-absorbing polymers by polymerizing a monomer solution comprising at least one ethylenically unsaturated, acid-bearing monomer which may be at least partly neutralized, from 0.01 to 0.5% by weight of at least one crosslinker based on the monomer, by polymerizing the monomer solution and aftertreating the resulting polymer with from 0.05 to 0.25% by weight of at least one postcrosslinker, based on the polymer, where the crosslinker is not a polyol, and from 0.05 to 0.5% by weight of at least one polyvalent cation based on the polymer.
摘要:
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.
摘要:
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.
摘要:
Superabsorbent polymer particles having a transient hydrophobicity, excellent gel integrity, and free swell gel bed permeability are disclosed. A method of producing the superabsorbent polymer particles by applying a polyamine coating and a cosolvent to the particles also is disclosed.
摘要:
A process for preparing water-absorbing polymer particles by coating water-absorbing polymer particles with a particulate solid in a mixer, wherein the particulate solid is dispersed by means of a gas stream and the supply of the dispersed particulate solid in the mixer ends below the product bed surface.
摘要:
A process for preparing water-absorbing polymer particles by coating water-absorbing polymer particles with a particulate solid in a mixer, wherein the particulate solid is dispersed by means of a gas stream and the supply of the dispersed particulate solid in the mixer ends below the product bed surface.
摘要:
A process for preparing water-absorbing polymer particles by spraying a liquid below the product bed surface by means of at least one spray nozzle in a mixer with moving mixing tools.
摘要:
A process for preparing water-absorbing polymer particles by spraying a liquid onto water-absorbing polymer particles by means of at least one thermally insulated and/or trace-heated spray nozzle in a mixer.