particle in the form of an encapsulated droplet, process for the manufacture of particles, aqueous coating composition, use of a polymeric dispersion or a polymeric dispersion, and substrate

摘要

particle in the form of an encapsulated droplet, process for the manufacture of particles, aqueous coating composition, use of a polymeric dispersion or a polymeric dispersion, and substrate. particle in the form of an encapsulated droplet comprising a core material and a shell material surrounding the core material, the maleimide group-containing shell material, preferably a maleimide group copolymer. The shell material contains a styrene copolymer and maleic anhydride derivatives, of which more than 75 mole%, preferably more than 90 mole% is maleimide and the average particle size is less than 300 nm. the particles are obtained by a process comprising heating, between 80 198 and 195 198 c, more preferably between 120 198 and 190 198, of an ammonium salt of a maleic anhydride-containing polymer in the presence of core material.