AQUEOUS DISPERSIONS OF POLYORGANOSILOXANES CONTAINING UREA GROUPS

摘要

New aqueous dispersions (A) are obtained by: (a) producing a solution of urea group-containing polysiloxane(s) (I) in an anhydrous organic solvent (II) of water solubility not more than 5 g per 100 g at room temperature; (b) mixing the solution with water, using at least one auxiliary (III) selected from dispersants, polyvinyl alcohol and/or guar flour; (c) homogenizing the mixture, preferably under high pressure; and (d) removing 90-100% of (II).