| 摘要 |
The use as oil-in-water emulsion breakers of phosphonic acid ester condensate oligomers is disclosed which oligomers are ester condensates of alkyl-1-hydroxy-1, 1-diphosphonic acid having the formula: <IMAGE> where R1 and R2 each represent a group having the formula CxH2x+1, where x is from 6 to 13; Y is <IMAGE> M is a water soluble cation such as Na, K or NH4, and n is 1 or greater.
|
