| 摘要 |
1490601 Chlorine-containing phosphate esters HOECHST AG 19 Sept 1975 [26 Oct 1974] 38532/75 Heading C2P The invention comprises phosphate esters of the general Formula (I): in which R is an alkylene or halo-alkylene radical having 2 to 6 carbon atoms, a -CH 2 CH 2 OCH 2 CH 2 - radical, a phenylene radical or an alkyl or halo-alkyl-substituted diphenylene methane radical (said substituent being on the methane carbon atom) and R 1 is a branched or unbranched C 6 -C 18 alkyl radical. They may be obtained by (a) reacting a compound of the formula: with at least stoichiometric proportions of chlorine gas at 0‹ to 5‹ C. in the presence of a solvent in which HCl is difficultly soluble to give a compound of the formula terminating the reaction and freeing the reaction solution from excess chlorine and resulting HCl by introducing an inert gas, e.g. nitrogen, thereinto, (b) forming the compound of Formula (I) by admixing the said reaction solution at 15‹ to 50‹ C. and while introducing further inert gas thereinto with a stiochiometric proportion of an alcohol R 1 OH, terminating the reaction and distilling off the solvent, and (c) freeing the crude product from adhering HCl by reacting the latter with an at least stoichiometric proportion of ethylene oxide at 60‹ to 120‹ C. and purifying the resulting product by distilling off ethylene chlorohydrin and excess ethylene oxide. The process is advantageously carried out as a single pot reaction and the ethylene oxide treatment in stage (c) is preferably carried out in the presence of 0À1-0À2% by weight of disodium phosphate as regulator. The products are useful as flame-retardant plasticizers for polyvinyl chloride as disclosed in Specification 1,490,602. |
