Process for the preparation of derivatives alkoxylated bisphenol

Composition comprising, per 100% of its mass: - from 55% to 85% by weight of an alkoxylated bisphenol derivative of formula (I): wherein R ', R "and R"' are identical or different, represent independently the other a hydrogen atom, a methyl radical or an ethyl radical, x represents a decimal number strictly greater than 0 and less than or equal to 5, y represents a decimal number greater than or equal to 0 and strictly less than 5, and x + y≤5; - from 10% to 40% by weight of isosorbide of formula (II): - from 0.5% to 5% by weight of an alkoxylated derivative of the isosorbide of formula (III):