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TONER AND IMAGE FORMING METHOD

  • US 20070207399A1
  • Filed: 03/02/2007
  • Published: 09/06/2007
  • Est. Priority Date: 03/06/2006
  • Status: Active Grant
First Claim
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1. A toner comprising:

  • toner particles which comprise a binding resin,a colorant,and a charge controlling agent, andexternal additives which comprise an inorganic particle,wherein the charge controlling agent is an organic boron compound represented by a following chemical formula (A);

    embedded image wherein B is boron, X is an alkali metal, R1, R2, R3 or R4 each represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a halogen atom, multiple R1, R2, R3 or R4 may be present, when the multiple R1, R2, R3 or R4 are present, they may be different or the same, and n represents an positive integer of 1 to 5;

    and the inorganic particle is a magnesium silicate compound represented by the following general formula (2);


    MgxSiyO(x+2y)



    (2) wherein x and y are integers, wherein Mohs hardness is 4.5 to 8.

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