Abstract:
The invention relates to a cross-linked, water-swellable polymer that contains polymerized into it moieties of a) water-soluble, monoethylenically unsaturated monomers, and b) 0.001 to 5 mole % based on the monomers a) of a cross-linking combination, b1) a first cross-linking agent with at least two (meth)acrylic ester moieties in the molecule and b2) a second cross-linking agent with at least two (meth)allyloxy moieties in the molecule, the molar ratio of b1) to b2) ranging from 0.7:1 to 10:1. The polymer according to the invention has a balanced property profile as regards absorptivity, gel strength, absorption speed and extractable components and can be advantageously produced by a continuous method.
Abstract:
Polímero formador de hidrogel con (i)una Saline Flow Conductivity (SFC) de al menos 40 x 10-7 cm3/g, (ii) un AUL 0, 7 psi (4826, 5 Pa) de al menos 20 g/g, y (iii) un índice de Frangibility de al amenos un 60 %.
Abstract:
Hydrogel-forming polymers which have:(i) a Saline Flow Conductivity of at least 40x10-7 cm3s/g;(ii) an AUL 0.7 psi (4826.5 Pa) of at least 20 g/g; and(iii) a Frangibility Index of at least 60%,are useful in hygienic articles such as incontinence briefs for adults and diapers for infants.
Abstract:
Bead polymers are prepared by reverse suspension polymerization by a process in which an aqueous solution of water-soluble ethylenically unsaturated monomers are polymerized in an aliphatic hydrocarbon using an inorganic suspending agent based on a modified finely divided mineral and, in addition, from 0.1 to 5% by weight, based on the monomers used, of a nonionic surfactant, in the presence of a polymerization initiator, with the formation of a water-in-oil polymer suspension.
Abstract:
Water-soluble homopolymers and copolymers of di-C1-C3-alkylaminoneopentyl (meth)acrylates, the homopolymers and copolymers having a K value of from 150 to 300, are used as retention agents, drainage agents and flocculants in papermaking. Increased retention, drainage rate and flocculation are achieved in comparison with the conventional basic polyacrylates.
Abstract:
Polímero reticulado hinchable en agua que contiene unidades mono-polimerizadas de: a) monómeros solubles en agua monoetilénicamente insaturados y b) 0, 001 a 5% en moles referido a los monómeros a) de una combinación de agente reticulador b1) de un primer agente reticulador con al menos dos unidades de éster (met)acrílico en la molécula y b2) de un segundo agente reticulador con al menos dos unidades (met)aliloxi en la molécula, en el que la relación molar de b1) a b2) se encuentra en el intervalo de 0, 7:1 a 10:1.