Use of boronic acids of the general formula for increasing the storage stability of epoxy resin compositions, comprising an epoxy resin and a curing agent for curing the epoxy resin, wherein formula represents: wherein radical R 1 means: R 1 = alkyl, hydroxyalkyl or a radical of formula, wherein formula is: wherein R 2, R 3, R 4 independently of one another mean and at least one radical R 2, R 3, R 4 is not hydrogen: R 2, R 3, R 4 = hydrogen, fluorine, chlorine, bromine, iodine, cyano, C 1 to C 5 alkyl, alkoxy, acyl, alkylsulfonyl, aryl, carboxyl, or B 2, wherein the epoxy resin composition comprises, as a curing agent, a curing agent according to formula, wherein formula is: wherein R 6, R 7, R 8 independently of one another mean: R 6, R 7 = independently of one another hydrogen or C 1 to C 5 alkyl, R 8 = C 1 to C 15 alkyl substituted with -NHC NR 6 R 7, C 3 to C 15 cycloalkyl substituted with -NHC NR 6 R 7, aryl substituted with -NHC NR 6 R 7 or alkylaryl substituted with -NHC NR 6 R 7, and wherein the epoxy resin composition does not comprise, in addition to the curing agent according to general formula, a curing agent selected from the group consisting of cyanamide, guanidines, cyanoguanidines, nitroguanidines, acylguanidines, biguanidines and a curing agent according to general formula, wherein formula is as follows wherein radicals R 40, R 41, R 42 independentlyly of one another mean: R 40 = cyano, nitro, acyl or a radical of the formula -(C=X)-R 43, with X = imino or oxygen, R 43 = amino, alkylamino or alkoxy, R 41 = hydrogen, C 1 to C 5 alkyl, aryl, benzyl, or acyl, R 42 = hydrogen or C 1 to C 5 alkyl. wherein radical R 1 means: R 1 = alkyl, hydroxyalkyl or a radical of formula, wherein formula is: R 1 = alkyl, hydroxyalkyl or a radical of formula, wherein formula is: wherein R 2, R 3, R 4 independently of one another mean and at least one radical R 2, R 3, R 4 is not hydrogen: R 2, R 3, R 4 = hydrogen, fluorine, chlorine, bromine, iodine, cyano, C 1 to C 5 alkyl, alkoxy, acyl, alkylsulfonyl, aryl, carboxyl, or B 2, R 2, R 3, R 4 = hydrogen, fluorine, chlorine, bromine, iodine, cyano, C 1 to C 5 alkyl, alkoxy, acyl, alkylsulfonyl, aryl, carboxyl, or B 2, wherein the epoxy resin composition comprises, as a curing agent, a curing agent according to formula, wherein formula is: wherein R 6, R 7, R 8 independently of one another mean: R 6, R 7 = independently of one another hydrogen or C 1 to C 5 alkyl, R 8 = C 1 to C 15 alkyl substituted with -NHC NR 6 R 7, C 3 to C 15 cycloalkyl substituted with -NHC NR 6 R 7, aryl substituted with -NHC NR 6 R 7 or alkylaryl substituted with -NHC NR 6 R 7, R 6, R 7 = independently of one another hydrogen or C 1 to C 5 alkyl, R 8 = C 1 to C 15 alkyl substituted with -NHC NR 6 R 7, C 3 to C 15 cycloalkyl substituted with -NHC NR 6 R 7, aryl substituted with -NHC NR 6 R 7 or alkylaryl substituted with -NHC NR 6 R 7, and wherein the epoxy resin composition does not comprise, in addition to the curing agent according to general formula, a curing agent selected from the group consisting of cyanamide, guanidines, cyanoguanidines, nitroguanidines, acylguanidines, biguanidines and a curing agent according to general formula, wherein formula is as follows wherein radicals R 40, R 41, R 42 independentlyly of one another mean: R 40 = cyano, nitro, acyl or a radical of the formula -(C=X)-R 43, with X = imino or oxygen, R 43 = amino, alkylamino or alkoxy, R 41 = hydrogen, C 1 to C 5 alkyl, aryl, benzyl, or acyl, R 42 = hydrogen or C 1 to C 5 alkyl. R 40 = cyano, nitro, acyl or a radical of the formula -(C=X)-R 43, with X = imino or oxygen, R 43 = amino, alkylamino or alkoxy, X = imino or oxygen, R 43 = amino, alkylamino or alkoxy, R 41 = hydrogen, C 1 to C 5 alkyl, aryl, benzyl, or acyl, R 42 = hydrogen or C 1 to C 5 alkyl.