Patent EP-2371792-A1 (EP)
Inventor: KELLER ADRIAN
IPC: C04B40/00
Filed: 2006-09-21
Abstract: Use of a powder redispersible in water in hydraulically setting systems for reducing efflorescence in hydraulically setting systems based on at least one organic component and at least one water-soluble organic polymeric protective colloid and optionally further additives, is claimed, where the powder redispersible in water comprises: the organic component containing at least one compound with a cyclic group; a water-soluble organic polymeric protective colloid; and at least one film-forming dispersion powder redispersible in water based on a film-forming dispersion. Use of a powder redispersible in water in hydraulically setting systems for reducing the efflorescence in hydraulically setting systems based on at least one organic component and at least one water-soluble organic polymeric protective colloid and optionally further additives, is claimed, where the powder redispersible in water comprises: the organic component containing at least one compound with a cyclic group, where the compound is completely or partially saturated and having a melting point of -20 to 250[deg] C and a molecular weight of 100-10000, and the organic component further contains a terpeneoid, a resin acid, colophony, terpene resin, terpene-phenol resin and/or their derivatives; a water-soluble organic polymeric protective colloid, where the organic component and the protective colloid form a stable dispersion in water, and the weight ratio of the organic component to the water-soluble organic polymeric protective colloid is 95:5-5:95; and 0-1000 parts by weight of at least one film-forming dispersion powder redispersible in water based on a film-forming dispersion, relative to the parts by weight of the sum of the organic component and the water-soluble organic polymeric protective colloid. An independent claim is included for use of an aqueous dispersion in hydraulically setting systems for the reduction of efflorescence in hydraulic systems based on at least one organic component and at least a water-soluble organic polymeric protective colloid and optionally other additives, where the aqueous dispersion, based on 100 parts by weight of the sum of the organic component and the water-soluble organic polymeric protective colloid, contains 5-95 parts by weight of rosin, abietic acid, sylvic acid, neoabietic acid, levopinaric acid, pimaric acid, isopimaric acid and/or palustric acid and/or their derivatives, 5-95 parts by weight of water-soluble organic polymeric synthetic protective colloid, which is at least one modified and/or unmodified polyvinyl alcohol with a degree of hydrolysis of 70-100 mole.% and a Hoppler viscosity, as a 4% aqueous solution, of 1-50 mPas, measured at 20[deg] C according to DIN 53015, and/or polyvinylpyrrolidone, and/or 20-95 parts by weight of water-soluble organic polymeric protective colloid, which is a natural and/or synthetically produced biopolymer, 0-500 parts by weight of at least one silane and/or siloxane components, and 0-10000 parts by weight of at least one film-forming aqueous polymeric dispersion, the solid content is 10-70 wt.%, the average particle size is 0.05-50 mu m, and the Brookfield viscosity, measured according to DIN 53019 at 23[deg] C and 20 revolutions per minute, is 100-50000 mPas.