Verfahren zur Imprägnierung von elektrisch leitenden Substraten

The process for impregnating substrates, in particular windings in electrical machines, with radical-hardened resin systems A) has the following features: the resin system A) is made up of A1) a resin which can be radical-hardened to form duroplasts, A2) at least one suitable hardening agent and optionally an accelerator, A3) optionally other comonomers and/or polymers with ethylenically unsaturated radical-polymerisable double bonds, the vapour pressure of A3) being low at the impregnation and hardening temperature, and A4) optionally other standard additives; the resin system A) is highly viscous, plastic and partially crystalline or crystalline at room temperature; and the resin system A) has low viscosity at impregnation temperature.