Process for the selective epoxidation of unsaturated (meth)acrylates, new functional (meth)acrylates so obtained and their use in the synthesis of new polymers

摘要

In this process is reacted at a temperature of 10 - 60degré c, an unsaturated (meth) acrylic compound of formula: & br / (see appended drawing in bopi) & br / & & br / (x = 0, s and nh, nr3 (r3 = alkyl, c1 - 1 2), or o - (ch2) n (where n = 1 - 16 approximately); r2 = hydrocarbon chain in the c2 - 2 0 chosen from linear or branched alkyl, cycloalkyl or heterocycloalkyl mono - or polycyclic or alkylaryl radical, this chain comprising an olefinic double bond in the chain, or at the end of the chain in the case of an alkyl or alkylaryl radical, or one olefinic double bond exo - or quaternary in the case of cycloalkyl or heterocycloalkyl mono - or polycyclic and r1 = h or alkyl, c1 - 5), with at least one oxidizing compound chosen from hydrogen peroxide in the presence of at least one catalyst chosen from among the alkali metal molybdates, tungstates, and in the presence of at least a phase transfer agent, and when r2 = cycloalkyl or heterocycloalkyl polycyclic, an organic peroxy acid or hydrogen peroxide in the presence of at least a heteropolyacid.