| 摘要 |
Halovinylene-1,2-bis(phosphonic acids) and their corresponding esters of the formula OHXO PARALLEL ¦¦ PARALLEL (RO)2PC=CP(OR)2 wherein R is hydrogen or a hydrocarbon radical having for example from 1-24 carbon atoms and X is a halogen atom e.g. chlorine or bromine. The halvinylene acids are obtained by hydrolysis of an ethynylene-1,2-bis(phosphonic acid diester) of the formula OO PARALLEL PARALLEL (R1O)2PC=CP(OR1)2 with concentrated aqueous haloacid (HX). The acids are useful as flameproofing agents for combustible organic materials, as inhibitors for metal corrosion, as inhibitors for scale formation and as intermediates in the formation of the corresponding monoesters and diesters. The esters are useful as plasticizers, lubricants, lubricant additives and functional fluids.
|
