Process for preparation of N,N,N',N'-tetraglycidyl-3,3'-dialkyl-4,4'-diaminophenylmethanes

摘要

Process for the preparation of compounds of the formula I …IMAGE… in which … …  R denotes glycidyl and …  R1 and R3, independently of one another, are C1-C6-alkyl and …  R2 and R4, independently of one another, are hydrogen or methyl, … characterised in that … …  (i) a diamine of the formula II …IMAGE… in which R1, R2, R3 and R4 have the abovementioned meaning, is reacted in epichlorohydrin in a molar ratio of 1:12 to 1:40 at a temperature of 80 to 115 DEG C and …  (ii) a phase transfer catalyst is admixed to the reaction mixture, the epichlorohydrin is subjected to distillation in a cycle and dehydrochlorination is carried out simultaneously with the addition of a concentrated aqueous alkali(alkaline earth) metal hydroxide solution and removal of the water distilled off azeotropically is carried out simultaneously. …