Conductive polymeric composite particles and processes thereof

Details Conductive polymeric composite particles and processes thereof Conductive polymeric composite particles and processes thereof

C - Chemistry, Metallurgy

08

F

C08F 2/44 (2006.01) C08F 292/00 (2006.01) G03G 9/113 (2006.01) H01B 1/20 (2006.01)

Patent

CA 2143889

A process for the preparation of conductive polymeric particles with linear and crosslinked portions, which comprises mixing a monomer with at least one conductive filler, solvent, at least one polymerization initiator, and a chain transfer component; effecting solution polymerization by heating until from about 80 to about 100 weight percent of the monomer has been polymerized; drying the mixture by removing the solvent to yield an intimate blend of polymer with conductive filler; dispersing the aforementioned blend of polymer and conductive filler in at least one monomer with at least one polymerization initiator, a crosslinking agent and a chain transfer agent to form an organic phase; dispersing the resulting organic phase mixture in water containing a stabilizing component to obtain a suspension of particles with an average volume diameter of from about 0.05 to about 5 microns in water; polymerizing the resulting suspension by heating; and subsequently optionally washing and drying the polymeric product.

Processus de préparation de particules polymériques conductrices avec des parties linéaires et réticulées. Le processus comprend les étapes suivantes : mélanger un monomère avec au moins une matière de charge, un solvant, au moins un initiateur de polymérisation et un élément de migration de chaîne; effectuer la polymérisation en solution en chauffant jusqu'à ce que de 80 à 100 pourcent en masse du monomère soit polymérisé; sécher le mélange en retirant le solvant afin de donner un mélange intime du polymère avec la matière de charge conductrice: disperser le mélange de polymère et de matière de charge dans au moins un monomère avec au moins un initiateur de polymérisation, un agent de réticulation et un agent de migration de chaîne afin de former une phase organique; disperser ce mélange dans de l'eau contenant un stabilisateur afin d'obtenir une suspension de particules d'un diamètre moyen d'environ 0,05 à 5 microns dans l'eau; polymériser cette suspension en chauffant; laver et sécher le produit polymérique, si désiré.

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