Charge controlling agent for electrostatic image development, and toner and charge-imparting material employing it
AssigneeMitsubishi Chemical Corporation
InventorsHitoshi Ono, Noriaki Takahashi, Osamu Ando, Masako Takeuchi
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Abstract
A charge controlling agent for electrostatic image development, which is a compound of the formula (I): Ar.sub.1 --(X--Ar.sub.2).sub.n (I) wherein each of Ar.sub.1 and Ar.sub.2 is a substituted or unsubstituted aromatic ring residue, X is a member selected from the group consisting of --CONH--, --NHCO--, --SO.sub.2 NH-- and --NHSO.sub.2 --, and n is an integer of at least 2, provided that a plurality of Ar.sub.2, or a plurality of X, are the same or different groups from one another, and toner and charge-imparting material employing the charge controlling agent.
Claims34
An electrostatic image-developing toner comprising a resin, a colorant and a charge controlling agent for electrostatic image development, which is a compound of the formula (I):
- Ar.sub.1 --(X--Ar.sub.2).sub.n (I)
- wherein each of Ar.sub.1 and Ar.sub.2 is substituted or unsubstituted aromatic ring residue, X is a member selected from the group consisting of --CONH--, --NHCO--, --SO.sub.2 NH-- and --NHSO.sub.2 --, and n is an integer of at least 2, provided that a plurality of Ar.sub.2, or a plurality of X, are the same or different groups from one another, wherein said charge controlling agent is internally incorporated in said electrostatic image-developing toner and imparts negative charge to said electrostatic image-developing toner.
A charge-imparting material for electrostatic image development having a charge controlling agent for electrostatic image development at least on a part of its surface, and the charge controlling agent for electrostatic image development is a compound of the formula (I):
- Ar.sub.1 --(X--Ar.sub.2).sub.n (I)
- wherein each of Ar.sub.1 and Ar.sub.2 is a substituted or unsubstituted aromatic ring residue, X is a member selected from the group consisting of --CONH--, --NHCO--, -SO.sub.2 NH-- and --NHSO.sub.2 --, and n is an integer of at least 2, provided that a plurality of Ar.sub.2, or a plurality of X, are the same or different groups from one another, wherein said charge controlling agent imparts negative charge to said charge-imparting material.
Dependencies are inferred from the claim text.