C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 7/04 (2006.01)
Patent
CA 2623569
Process for the coating of polymer particles, comprising contacting the particles with a composition comprising an additive, a film-forming binder that is miscible with the polymer, and a distributing agent, removing the distributing agent at a particle temperature at which the binder can form a film and that is below the softening temperature Tp of the polymer, and forming and consolidating an additive-containing layer of binder on the polymer particles, the polymer particles being kept in mutual motion while they are being contacted with the composition and while the additive- containing layer of binder is being formed and consolidated.
L'invention porte sur un procédé de revêtement de particules polymères. Ledit procédé consiste : à mettre en contact les particules avec une composition renfermant un additif, un liant filmogène qui est miscible avec le polymère, et un agent de répartition; à retirer l'agent de répartition à une température de particule à laquelle le liant est capable de former un film et qui est inférieure à la température de ramollissement tp du polymère ; et à former et à consolider une couche de liant contenant l'additif sur les particules polymères, les particules polymères étant maintenues en mouvement mutuel pendant leur mise en contact avec la composition et pendant la formation et la consolidation de la couche de liant contenant l'additif.
Dsm Ip Assets B.v.
Smart & Biggar
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