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

Particulate in the form of an encapsulated gouticle, Process for the manufacture of particles, Composition of aqueous coating, Use of a polymeric 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 80Â ° C and 195Â ° C, more preferably between 120Â ° C and 190Â ° C, of an ammonium salt of an anhydride-containing polymer. maleic in the presence of the core material.