| 摘要 |
This invention relates to a process for making substituted acylating agents by the reaction of an enophile containing at least one carboxyl group with a polyolefin selected from polypropylene and poly(iso)butene. To the reaction mixture is added an at least (a)one olefin of the formula (R)(R1).C=C.(R2)(R3) wherein at least one of R, R1, R2 and R3 is hydrogen and at least one of the other three is (i) an alkyl group having at least 3 carbon atoms or (ii) at least one of R2 and R3 together with R1 forms a cycloaliphatic ring such that the olefin has at least 5 carbon atoms in a linear hydrocarbyl chain, or, (b) one adduct of said olefin of formula (I) with the reactant enophile. The products of the reaction have a substantially reduced amount of resin.
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