| 摘要 |
Polycarboxylic acids and their salts corresponding to the following general formula [X]-(NHOC-Y-COO M)n (I) in which X is the residue of a hydrophobic, linear or branched vinyl oligomer having an average molecular weight &upbar& Mn of from 200 to 5000 and preferably from 300 to 3000, Y is the 1,2-vinylene, 1,2-ethylene, 1,3-propylene, 1,2-phenylene, 1,2-cyclohexen-4-ylene or 1,2-cyclohexylene group, n is a number of from 1.4 to 3.0 and preferably from 1.6 to 2.3 and M is hydrogen, an alkali metal, an ammonium, C1-C4 alkylammonium or C2-C3 hydroxyalkylammonium group, which are useful as surfactants and emulsifiers in aqueous systems.
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