B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 13/02 (2006.01) C08F 2/44 (2006.01) C08F 222/08 (2006.01) C09D 5/02 (2006.01) D21H 21/16 (2006.01)
Patent
CA 2657261
Particle in the shape of an encapsulated droplet comprising a core material and a shell material surrounding the core material, the shell material containing maleimide groups, preferably a copolymer of maleimide groups. The shell material contains a copolymer of styrene and maleic anhydride derivatives, of which more than 75 mole %, preferably more than 90 mole% is maleimide, and the average particle size is smaller than 300 nm. The particles are obtained by a process comprising by heating between 80°C and 195°C, more preferably between 120°C and 190°C an ammonium salt of a maleic anhydride containing polymer in the presence of the core material.
L'invention concerne une particule sous forme d'une gouttelette encapsulée comprenant un matériau central et un matériau d'enveloppe entourant le matériau central, ledit matériau d'enveloppe contenant des groupements maléimide, de préférence un copolymère de groupements maléimide. Le matériau d'enveloppe contient un copolymère de styrène et de dérivés d'anhydride maléique, parmi lesquels plus de 75 % en moles, de préférence plus de 90 % en moles, est du maléimide, et la taille moyenne de particule est inférieure à 300 nm. Les particules sont obtenues par un procédé comprenant le chauffage entre 80 °C et 195 °C, plus préférablement entre 120 °C et 190 °C, d'un sel d'ammonium d'un polymère contenant de l'anhydride maléique en présence du matériau central.
Fetherstonhaugh & Co.
Topchim N.v.
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