| 摘要 |
<p>Mixed phosphoric acid ester compositions are prepared by reacting at a low temperature in an anhydrous system, and in the presence of a catalytic amount of sodium, an ester of phosphoric acid having the formula: <CHEM> wherein R1 may be the same or a different aromatic radical selected from the group consisting of phenyl and substituted phenyl radicals; with an aliphatic alcohol having the formula: R2CH2CH2OH wherein R2 ist the same or a different aliphatic radical selected from the group consisting of alkyl and alkoxy radicals. A transesterification mixture is obtained that contains a substantial amount of each of the compounds: R1O-@-(OCH2CH2R2)2 and (R1O)2- @-OCH2CH2R2 wherein R1 and R2 are the radicals defined above. The mixed phosphate acid ester composition may be separated from alcohols present in the transesterification mixture by distillation, and are useful plasticizers for polyvinyl chloride polymers.</p> |
