| 摘要 |
The present invention provides a liquid fuel composition comprising: a) a base fuel suitable for use in an internal combustion engine; and b) one or more poly(hydroxycarboxylic acid) derivative having a terminal acid group having formula (III): [Y-CO[O-A-CO]n-Zp]m-X (III) wherein Y is hydrogen or optionally substituted hydrocarbyl group, A is a divalent optionally substituted hydrocarbyl group, n is from 1 to 100, m is 1 or 2, Z is an optionally substituted divalent bridging group, p is 0 or 1, and X is terminal acid group or a group carrying a terminal acid group, wherein the terminal acid group is selected from carboxylic acid, carboxymethyl, sulphate, sulphonate, phosphate and phosphonate.
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