| 摘要 |
Quaternary ammonium compounds having the general formula: <IMAGE> in which, R1 is an alkyl or aryl group, unsubstituted or substituted by at least two ester groups; R2, R3 and R4 are alkyl, aryl, aryl alkyl or alkyl aryl groups substituted by ester groups comprising no more than 10 carbon atoms; m, r and n are whole numbers; A &cir& r- is an anion such that mxr=n. The compounds are obtained by treatment of a tert.alcohol-amine with an alkylating or arylating agent and an acylating agent. They may be used as activators of persalts in wash compositions.
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