Liquid developer for electrostatic photography
AssigneeFuji Photo Film Co., Ltd.
InventorsNobuo Suzuki, Yutaka Sakasai, Seiji Horie, Eiichi Kato
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Abstract
There is disclosed a liquid developer composition for electrostatic photography, which comprises, in a nonaqueous solvent having an electric resistance of 10.sup.9 .OMEGA..cm or over and a dielectric constant of 3.5 or over, a toner particle, a charge-controlling agent or resin, and an acid group containing polymer soluble in said nonaqueous solvent and/or a quaternary ammonium salt.
Claims20
A liquid developer for electrostatic photography, which comprises, in a nonaqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA..cm and a dielectric constant of up to 3.5, (a) a toner containing at least a resin, (b) a charge-controlling agent resin or a charge-controlling agent, and (c) an acid group-containing polymer soluble in said nonaqueous solvent;
- wherein said charge-controlling agent resin is a copolymer comprising a reaction product of a polymer comprising maleic anhydride and at least one monomer that can be polymerized to form a polymer soluble in said nonaqueous solvent, with a primary amino compound or a mixture of a primary amino compound and a secondary amino compound, and comprising hemimaleic acid amide components and maleinimide components as repeating units.
A liquid developer for electrostatic photography, which comprises, in a nonaqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA..cm and a dielectric constant of up to 3.5, (a) a toner containing at least a resin, (b) a charge-controlling agent, and (c) a quaternary ammonium salt;
- wherein said charge-controlling agent is a metal soap soluble in said nonaqueous solvent.
A liquid developer for electrostatic photography, which comprises, in a nonaqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA..cm and a dielectric constant of up to 3.5, (a) a toner containing at least a resin, (b) a charge-controlling agent resin, and (c) a quaternary ammonium salt;
- wherein said charge-controlling agent resin is a copolymer comprising a reaction product of a polymer comprising maleic anhydride and at least one monomer that can be polymerized to form a polymer soluble in said nonaqueous solvent, with a primary amino compound or a mixture of a primary amino compound and a secondary amino compound, and comprising hemimaleic acid amide components and maleinimide components as repeating units.
A liquid developer for electrostatic photography, which comprises, in a nonaqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA..cm and a dielectric constant of up to 3.5, (a) a toner containing at least a resin, (b) a charge-controlling agent resin or a charge-controlling agent, and (c) a quaternary ammonium salt that is insoluble or sparingly soluble in said nonaqueous solvent.
A liquid developer for electrostatic photography, which comprises, in a nonaqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA..cm and a dielectric constant of up to 35, (a) a toner containing at least a resin, (b) a charge-controlling agent resin or a charge-controlling agent, (c) a quaternary ammonium salt, and (d) an acid group-containing polymer soluble in said nonaqueous solvent.
Dependencies are inferred from the claim text.