Coating materials containing particles with protected isocyanate groups

A coating formulation having a solids fraction, comprising components:

• a) 20-90% by weight of a film-forming resin containing reactive groups,
• b) 1-90% by weight, based on the solids fraction, of a coating curative, possessing reactive functional groups which cure at elevated temperature by reacting with the reactive groups of the film-forming resin,
• and in addition to components a) and b),
• c) 0.1-40% by weight, based on the solids fraction, of particles having a core of metal oxides, silicon oxides, mixed metal/silicon oxides, silicone resins, or a combination thereof, the particles having on their surface at least one protected isocyanate group which upon cure eliminates a protective group to release an isocyanate functionality, more than 70% of the protected isocyanate groups bearing protective groups whose elimination temperature is below the temperature of the reaction of the functional groups of the film-forming resin with those of the curative, and
• d) 0-90% by weight, based on the overall coating formulation, of a solvent or a solvent mixture
• wherein the percents by weight are based on the total weight of the solids fraction.