摘要:
The invention relates to the production of superabsorbent polymers on a continuous belt reactor, wherein the continuous belt rests at least partly upon at least one support belt and the at least one continuous support belt is a metallic belt with a basis weight of at least 1 kg/m2.
摘要:
Water-absorbing composites comprising at least two particulate water-absorbing polymers having different pH values and at least one fibrous material are produced without premixing the water-absorbing polymers and are used in hygiene articles.
摘要:
A process for preparing postcrosslinked water-absorbing polymer beads with high absorption by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the solids content of the monomer solution is at least 35% by weight and the polymer beads have a mean diameter of at least 150 μm.
摘要:
The invention contains a process for the surface postcrosslinking of water-absorbing polymers in which the polymers are treated with a surface postcrosslinking solution and during or after the treatment are postcrosslinked by means of an increase in temperature and are dried, wherein the crossiinker comprises a bis-2-oxazolidinone or a poly-2-oxazolidinone comprising structural units of the formula in which R1 is branched or unbranched C1-C18-alkylene, branched or unbranched C2-C18-alkenylene, C5-C18-cycloalkylene, phenylene, naphthylene, anthracenylene, hydrocarbon-substituted phenylene, naphthylene or anthracenylene or another substituted or unsubstituted C6-C18-arylene radical, R2 is branched or unbranched C1-C18-alkylene and n is an integer from 1 to 50 or a mixture of bis-2-oxazolidinones and poly-2-oxazolidinones dissolved in an inert solvent.
摘要:
The present invention relates to fluid-absorbent articles, comprising an upper liquid-pervious layer, a lower liquid-impervious layer and a fluid-absorbent core, wherein the fluid-absorbent core comprises a fibrous material and 10 to 95% by weight of spherical fluid-absorbent polymer particles having a moisture content of at least 8% by weight.
摘要:
The present invention relates to fluid-absorbent articles, comprising an upper liquid-pervious layer, a lower liquid-impervious layer, a fluid-absorbent core, wherein the fluid-absorbent core comprises a fibrous material and 10 to 95% by weight of spherical fluid-absorbent polymer particles, and an acquisition distribution layer, wherein the acquisition distribution layer comprises a fibrous material and 0 to 20% by weight of spherical fluid-absorbent polymer particles.
摘要:
The present invention relates to a method for producing water-absorbing polymer particles by radiation-inducing polymerization on a continuously revolving belt, electromagnetic radiation having a wavelength of greater than 400 nm being shielded.
摘要:
A process for producing water-absorbing polymer particles, wherein an aqueous polymer gel is dried in a forced-air belt drier on a circulating conveyor belt and the surface of the conveyor belt has a multitude of elevations or depressions which are suitable for restricting the mobility of the aqueous polymer gel in transverse direction.
摘要:
A process for producing water-absorbing polymer particles, wherein an aqueous polymer gel is applied by means of a swivel belt to the conveyor belt of a forced-air belt drier, and the swivel belt, proceeding from one end position, is accelerated through a first pivot angle to an angular speed v1, decelerated through a second pivot angle to an angular speed v2 and decelerated through a third pivot angle to the other end position.
摘要:
A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets and postcrosslinking the polymer particles, wherein the postcrosslinked polymer particles are at least partly coated.