| 摘要 |
Process for the preparation of aqueous solutions of unsaturated quaternary ammonium salts I corresponding to the following formula: H2C=CH-C(O)-A-R3-N<+)<R1)(R2)(R) X<-> in which: - A is an oxygen atom or an NH group; - R3 is a linear or branched alkyl radical containing 1 to 6 carbon atoms; - R1, R2 and R, which are identical or different, are each an alkyl radical or an aryl radical; - X is chosen from Cl, Br, I, CH3-CO3 and CH3-SO4 from at least one acrylic monomer II of formula: H2C=CH-C(O)-A-R3-N(R1)(R2> and from at least one quaternising agent III of formula RX. The reaction is carried out under an absolute pressure between 3 and 10 bar. Application to the preparation, in a reduced time, of solutions containing very few impurities.
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