| abstract |
PROCESS FOR THE PREPARATION OF WATER-ABSORBING POLYMERIC PARTICLES, POLYMERIC PARTICLES AND THEIR USE, COMPOSITE MATERIAL AND THEIR USE, PROCESS FOR THE PRODUCTION OF A COMPOSITE MATERIAL, FOAMS, CONFORMED ARTICLES, FIBERS. The invention relates, in general, to the preparation of polymeric particles in a process for water absorbers comprising the following processing steps: (i) preparing an aqueous monomeric solution comprising ethylenically monounsaturated monomers carrying at least partially carboxylic acid groups neutralized (alpha1), and at least one crosslinking agent (alpha3); (ii) optionally adding fine particles of a water-absorbing polymer to the aqueous monomer solution; (iii) adding a polymerization initiator or at least one component of a polymerization initiator system that comprises two or more components to the aqueous monomer solution; (iv) decrease the oxygen content of the aqueous monomer solution; (v) loading the aqueous monomeric solution into a polymerization reactor; (vi) polymerize the monomers present in the aqueous monomeric solution in the polymerization reactor; (vii) unloading the polymeric gel tape out of the polymerization reactor and optionally comminuting the polymeric gel, thus obtaining particles of polymeric gel; (viii) drying the polymeric gel particles; (ix) grinding the polymeric gel particles (...). |