| 摘要 |
Method for the preparation of aqueous, finely dispersed, shelf-stable silicone oil emulsions with the use of emulsifiers. Dimethyl polysiloxanes and 0.1-0.3 part by weight of emulsifiers, based on the dimethyl polysiloxanes, of a monoester or diester of orthophosphoric acid or mixtures thereof, are mixed, with agitation at temperatures of between 20 DEG and 150 DEG C. until a clear solution is obtained; thereupon an organic base or alkali is added up to neutralization; and subsequently the neutralized mixture is diluted with water. The monoesters and diesters of orthophosphoric acid and mixtures thereof comprising the emulsifiers are prepared by the reaction of: (a) 1-n-octanol or 1-n-octenol with P2O5, or (b) straight-chain primary alcohols of 6-10 carbon atoms with phosphoric acids or phosphorus halogenides, or (c) mixtures of primary alcohols of an average molecular weight of 110 to 160, which are straight-chain to an extent of at least 50 molar percent and contain 1-22 carbon atoms, with phosphoric acids, phosphorus oxides, or phosphorus halogenides. |
