| 摘要 |
<p>of the Invention A novel method for preparing phosphonic acid ester condensate oligomers are disclosed which are oligomeric ester condensates of alkyl-1-hydroxy-1,1-di-phosphonic acid having the formula: where R1 and R2 each represent a group having the formula CxH2x+1, where x is from 1 to 13; Y is , , or hydrogen; M is a water soluble cation such as Na, K or NH4, and n is 1 or greater. The use of these materials as reverse emulsion breakers wherein x is from 6 to 13 is also disclosed and these compounds are novel. Compounds wherein x is from 2 to 5 are also novel.</p> |
