Emulsifier from condensing polyether polyol(s) and polyepoxide

摘要

An emulsifier composition for water-dilutable epoxy resins comprise condensation products of an aliphatic polyol component having a weight-average molar mass (Mw) of from 200 to 20,000 g/mol, where a mass fraction of at least 5%, has a weight-average molar mass (Mw) of at least 4000 g/mol, and an epoxide component having of at least one epoxide compound having at least two epoxide groups per molecule and an epoxide group content of from 500 to 10,000 mmol/kg, the ratio of the number of hydroxyl groups to that of the epoxide groups (OH):(EP) being from 1:3.51 to 1:10. When the emulsifier is used for the preparation of aqueous epoxy resin systems, the end of the pot life is indicated by a sharp rise in viscosity.