Use of salt-like structured silicas as charge control agents

Details Use of salt-like structured silicas as charge control agents Use of salt-like structured silicas as charge control agents

G - Physics

03

G

G03G 9/097 (2006.01) B01D 57/00 (2006.01) C01B 33/44 (2006.01) C01B 39/02 (2006.01) C07C 211/63 (2006.01) C09D 5/03 (2006.01) H01G 7/02 (2006.01)

Patent

CA 2394808

The invention relates to the use of salt-like structural silicates, wherein the cation is NH4+, H3O+, an alkali, alkali earth, earth metal or a transition metal ion or a low molecular weight organic cation or a combination thereof and the anion is embodied as an island, ring, group, chain, band, layer or tectosilicate or a combination thereof as charge controlling agents in electrophotographic toners and developers, in coating powders, electret materials and in electrostatic separation methods.

La présente invention concerne l'utilisation, comme agents de régulation de charge dans des toners et des développeurs électrophotographiques, dans des peintures en poudre, dans des matériaux du type électret, et pour la mise en oeuvre de procédés de séparation électrostatiques, de silicates structuraux du type sel dans lesquels le cation NH4<+>, H3O<+>, peut être un ion d'un métal alcalin, d'un métal alcalino-terreux, d'un métal terreux ou un ion d'un métal de transition, ou bien un cation organique de faible poids moléculaire, ou bien encore une combinaison de ceux-ci, et l'anion peut être un nésosilicate, un cyclosilicate, un sorosilicate, un silicate en chaîne, un silicate en ruban, un phyllosilicate ou un tectosilicate, ou bien une combinaison de ceux-ci.

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