Abstract: A process for producing multicoat paint systems by (I) applying a dual-cure primer (A) curable thermally and with actinic radiation to a substrate to give a primer film (A), (II) exposing the primer film (A) to actinic radiation to give a partially cured primer film (A), (III) applying a pigmented coating material (B) curable thermally and/or a pigmented dual-cure coating material (B) to the partially cured primer film (A) to give at least one pigmented film (B), (IV) exposing the dual-cure film (B) to actinic radiation to give a partially cured film (B), (V) applying a clearcoat material (C) curable with actinic radiation and/or a dual-cure clearcoat material (C) to the film (B) to give a clearcoat and/or a dual-cure clearcoat film (C), (VI) exposing the clearcoat film(s) (C) to actinic radiation to give a dual-cure clearcoat (C) and/or a partially cured clearcoat film (C), and (VII) subjecting the films (A), (B), and (C) to joint thermal curing when still only partially cured.

Abstract: A process for coating microporous surfaces which have pores with a size of from 10 to 1500 nm, in which the surfaces in question are coated with at least one coating material curable thermally and with actinic radiation, after which the resulting film(s) is(are) cured thermally and with actinic radiation, wherein the coating material or at least one of the coating materials comprises (a1) at least one constituent containing (a11) on average per molecule at least two functional groups which contain at least one bond which can be activated with actinic radiation and which serves for crosslinking with actinic radiation, and, if desired, (a12) at least one isocyanate-reactive group, (a2) at least one thermally curable constituent containing at least two isocyanate-reactive groups, and (a3) at least one polyisocyanate.

Abstract: A coating material curable thermally and with actinic radiation and comprising (a1) at least one constituent containing (a11) on average per molecule at least two functional groups which contain at least one bond which can be activated with actinic radiation and which serves for crosslinking with actinic radiation and, if desired, (a12) at least one isocyanate-reactive group, (a2) at least one thermally curable constituent having at least two isocyanate-reactive groups, and (a3) at least one aromatic polyisocyanate which is free from functional groups (a11), or a mixture of at least one aromatic polyisocyanate which is free from functional groups (a11) and of at least one (cyclo)aliphatic polyisocyanate which is free from functional groups (a11); and its use for coating microporous surfaces, especially of SMCs and BMCs.

Abstract: A process for producing multicoat paint systems by (I) applying a dual-cure primer (A) curable thermally and with actinic radiation to a substrate to give a primer film (A), (II) exposing the primer film (A) to actinic radiation to give a partially cured primer film (A), (III) applying a pigmented coating material (B) curable thermally and/or a pigmented dual-cure coating material (B) to the partially cured primer film (A) to give at least one pigmented film (B), (IV) exposing the dual-cure film (B) to actinic radiation to give a partially cured film (B), (V) applying a clearcoat material (C) curable with actinic radiation and/or a dual-cure clearcoat material (C) to the film (B) to give a clearcoat and/or a dual-cure clearcoat film (C), (VI) exposing the clearcoat film(s) (C) to actinic radiation to give a dual-cure clearcoat (C) and/or a partially cured clearcoat film (C), and (VII) subjecting the films (A), (B), and (C) to joint thermal curing when still only partially cured.