| abstract |
In order to provide composite filler particles having a median particle size of 1 to 70 μm, a granular filler having a median particle size of 1 to 1200 nm is exposed on the surface with a reactive group that is an addition polymerizable group or a sequentially polymerizable group. Coating the coating layer to be coated with a coating composition comprising a film-forming agent to form on the filler surface to form a coated granular filler, and thereafter or simultaneously, optionally representing additional crosslinking agents and reactive groups. Agglomerating the granular filler to provide its granules in the presence of additional granular fillers that do not exit, the granules being separated from and connected to the granular filler particles by a coating layer; Optional further particulate filler particles, the coating layer being optionally crosslinkable with a crosslinking group obtained by reacting reactive groups and optionally further crosslinking agents, and optionally , Pulverizing, classifying and / or sieving the granules, and optionally further crosslinking the granules, wherein the reactive groups are obtained by reacting reactive groups and optionally further crosslinking agents A process that is converted to a base and the particulate filler is the main component of the composite filler particles on a volume basis. |