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Abstract

The use of a copolymer as a detergent additive in an internal combustion engine liquid fuel. The copolymer obtained by copolymerization of at least: an alkyl acrylate or alkyl methacrylate monomer ma and a styrenic monomer mb chosen from styrenics derivatives, the aromatic ring of which is substituted by at least one group R or at least one linear or branched C₁ to C₁₂ hydrocarbon-based chain substituted by at least one group R being chosen from: the hydroxyl group, a group —OR′, a group —(OC_yH_2yO)_f—H, a group —(OC_yH_2yO)_f—R′, a group —O—(CO)—R′, and a group —(CO)—OR′, where y is an integer ranging from 2 to 8, f is an integer ranging from 1 to 10, and R′ is chosen from C₁ to C₂₄ alkyl chains. Also, a process for maintaining the cleanliness of and/or for cleaning at least one of the internal parts of an internal combustion engine.

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First Claim