| 摘要 |
The invention relates to the use of resins that can be obtained from compounds of formula (1), in which substituents R<1 >and OH can, with regard to one another, be located in ortho position, meta position or para position, and R<1 >represents C1-C30 alkyl, C2-C30 alkenyl, C6-C18 aryl or C7-C30 alkyl aryl. The inventive resins are produced using the following steps, which can be carried out in any order: A) reacting with a compound of formula (2): OHC-COOR<2>, wherein R<2 >represents H, C1-C30 alkyl, C2-C30 aryl or C7-C30 alkyl aryl, and; B) alkoxylating with a C2-C4 alkylene oxide in molar excess so that the resulting alkoxylate has a degree of alkoxylation of 0 to 100 alkylene oxide units per OH group. In addition, the inventive resins have a molecular weight ranging from 250 to 100,000 units in quantities of 0.0001 to 5 wt. % with regard to the emulsion. The inventive resins are used a demulsiflers for oil-in-water emulsions, in particular, in the domain of petroleum extraction.
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