Patent ID: 8242182
Filing Date: 2012-08-14
Classification: C11D,Y10T

Abstract:
1. Water-soluble porous bodies comprising a three dimensional, oil-in-water emulsion-templated, freeze-dried, open-cell lattice, from which the bulk of the water and oil have been removed comprising: (a) less than 10% by weight of water-soluble polymeric material other than a surfactant, said water-soluble polymeric material forming a homogeneous solution in water; (b) about 5 to 95% by weight of a surfactant; and, (c) a water-insoluble material incorporated into said lattice to be dispersed when the water-soluble porous body dissolves; said porous bodies having an intrusion volume as measured by mercury porosimetry of at least about 3 ml/g, and comprise two types of pores: one from the sublimation of solid ice of the continuous aqueous phase and one from the sublimation of the solid oil of the discontinuous phase; wherein said porous bodies are powders having a particle size below about 0.2 mm or moulded bodies having a particle size above about 5 mm; with the proviso that said porous bodies are not spherical beads having an average bead diameter of 0.2-5.0 mm; wherein said water-soluble polymeric material is a water-soluble natural gum, a water-soluble polysaccharide, a water-soluble cellulose derivative or a water-soluble homopolymer or copolymer comprising (co)monomers selected from the group consisting of: vinyl alcohol, acrylic acid, methacrylic acid acrylamide, methacrylamide acrylamide methylpropane sulphonates aminoalkylacrylates aminoalkylmethacrylates hydroxyethylacrylate hydroxyethylmethylacrylate vinyl pyrrolidone vinyl imidazole vinyl amines vinyl pyridine ethyleneglycol ethylene oxide ethyleneimine styrenesulphonates ethyleneglycolacrylates ethyleneglycol methacrylate; and mixtures thereof.