Method of increasing the viscosity of water, and use of the method

METHOD OF THICKENING OF WATER, AND ITS USE

... 2137555 9325474 PCTABS00028 The method proposed for increasing the viscosity of water is charcterized in that, for the instantaneous production of increased-viscosity water which does not lose its viscosity characteristics on storage, a slurry is prepared containing 1-9 %, preferably 2-5 %, of high-disperse synthetic, preferably pyrogenic, silicic acid in water with only a small amount of added ethers of fatty alcohols or saccaric alcoohols or esters of fatty acids with poly(ethylene glycol) or poly(propylene glycol) with a molecular weight between 250 and 50,000, at a concentration of 0.005 to 1.5 %, poly(ethylene glycol) or poly(propylene glycol) with a molecular weight between 600 and 50,000 at a concentration of 0.05 to 1.5 %, poly(ethylenimine) at a concentration > 0.003 or poly(N-vinyl-2-pyrrolidone) at a concentration of 0.05 to 0.5 %. Characteristic of this system is its marked rheopexic properties which are shown instantaneously under the action of shear forces. Under such conditions ...

Method of increasing the viscosity of water, and use of the method