JPS59177566A - Electrostatic latent image developing toner - Google Patents

Abstract

PURPOSE:To obtain a toner electrostatically chargeable sufficiently and uniformly without scattering among the particles, and having stable characteristics in the system of an image developing means by incorporating a specified compd. as an electrostatic charge controller in the toner. CONSTITUTION:A toner contains as a charge controller a compd. represented by the formula shown on the right. It is used together with a binder resin, such as homopolymers of styrenes, vinyl esters, alpha-methylene aliphatic monocarboxylic esters, and n-vinyl compd., compolymers of >=2 such monomers, and combinations of said polymers, and nonvinyl type resins of thermoplastic resins, etc., and mixtures of said vinyl and nonvinyl type resins.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is for covering an electrically latent image in a layer for developing it in electrophotography, electrostatic recording, electrostatic printing, etc. In the case of development, there is a liquid development method in which fine powders such as pigments, dyes, and fixing resins are dispersed and dissolved in an insulating Momoura-based solvent and developed by immersion in a developer.
A developer is prepared by mixing fine particle 1-ner containing natural or synthetic resin and dye as a charge control agent, and glass]; or -1-17 rear such as iron powder (11). There are dry developing methods such as the cascade method, the bristle brush method, the magnetic 7-inch development method, and the Barac-Cloud method. This relates to a tonneau used in a developing method.

Conventional dry developer toner (JL) is prepared by melting and dispersing a mixture of carbon black and other additives and a charge control agent in a thermoplastic natural resin or synthetic resin, and pulverizing this to form a fine powder with a diameter of 5 to 20 μm. Dojitachino is used.

As a charge control agent used in J, Una dry type developer 1 to BO, for example, Fetschierharz N BM (C, I, No. , 26150), Nicrocin (C, I, No, 5041!i), Sutanjikushikoharz BB (C, I, No, 26
150), Brilliant Spirit Shicopaltz TN (
Halben, fu7 purino7n, pie? Ah? i'N
> or Zabon Schwarz (Halbwerke, Hechs 1-
6), etc., and as a negative charge control agent, Lereschiffwarzko<1R)G (manufactured by Harchenfu 7 Brinonon, Heij\7-ne), Kurotgenshi]Walz L T C○ (C.

1, lo, 14645) or Azo Ailblack R(R) (manufactured by National, Aniline), etc. are known.

Since these charge control agents are mainly selected from dye 1 series, they have a complex structure and poor stability, and are susceptible to decomposition or decomposition due to mechanical friction and impact, changes in temperature and humidity, electrical shock, and exposure to light. (It is highly degraded and its charge controllability is easily manipulated.)

In addition, for many conventional charge control agents, it is extremely difficult to uniformly disperse and dissolve them in thermoplastic resins. The distribution becomes uneven. Toner containing such a charge control agent will not be able to faithfully visualize the electrical markings, making it impossible to ensure the reliability of the visualization means as a system.

The object of the present invention is to provide a toner for electrical warm imaging which improves the above-mentioned drawbacks, and in which the shore line has a sufficient charge amount of 141 for 1 heno-particle and 1
- It is an object of the present invention to provide a charge control agent for toner, which has no variation in the amount of charge between toner particles and can have stable characteristics in the system's visualization means.

2. In view of the purpose of the present invention, the present inventors conducted various studies and as a result, the present inventors used a compound represented by the following formula as a charge control agent in a toner that visualizes an electrical latent image. In particular, J. J. has discovered that the above object can be achieved, and has accomplished the present invention.

The charge control agent for 1 to 3 according to the present invention can be synthesized by a conventionally known method, but it can also be obtained as a commercially available product.

Furthermore, the toner of the present invention can use a wide variety of conventionally known binder resins, such as styrenes such as styrene and parachlorostyrene, vinylpphthalene,
Examples include arsenic chloride, vinyl bromide, vinyl fluoride,
Vinyl acetate, vinyl propionate, vinyl penzoate,
Vinyl Nisdels such as vinyl butyrate, such as methyl acrylate, ethyl acrylate, 11-butyl acrylate, isobutyl acrylate, i-decyl acrylate, 1]-Δmethyl acrylate, 2-chloro-ethyl acrylate, acrylic acid Phenyl, methyl α-chloroacrylate,
Esters of α-methylene aliphatic monocarboxylic acids such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, acryloni-1-helyl, methacryloni-1-lyl, acrylamide, such as “vinyl methyl ether,
Vinyl ethers such as vinyl isobutyl ether and vinyl ethyl ether, such as vinyl methyl ketone,
Vinyl carbon compounds such as vinylhexyl coke, N-vinylpyrol, N-vinylcarbazole, N-
-vinyl pyrrol, N-vinyl vinyl 1-1 lydone
-Vinyl compound 4f Any monomers are combined by hand without polymerization, or two or more of these monomers are combined by hand.1. ! Copolymerized lζ copolymers or mixtures thereof, or, for example, rosin modification) (1) Non-vinyl thermoplastic resins such as phenol-formalin resins, oil-modified epoxy resins, polyurethane resins, cellulose resins, and polynisder resins. Examples include resins or mixtures thereof with vinyl resins such as those described above.

In addition, materials specifically limited to pressure fixing materials include the following.

Polyurethane ((1 [molecular weight polyethylene, low molecular weight polypropylene, polyethylene oxide, polyethylene oxide, etc.], epoxy resin, polynisder resin (oxidized 1
0 or less), polymer of ``styrene butadiene'' (monomer 5 to 30:95 to 70), A-refin copolymer, ethylene-acrylic acid copolymer, J-dilene-acrylic acid copolymer, Ren-methacrylic acid conjugate,
J-Dylene-methacrylic acid (steryl-vinyl chloride copolymer, D-ethylene-vinyl acetate copolymer, IA Tsumar resin), polyvinylpyrrolidone, methylvinyl-maleic anhydride JL Polymer, nitric acid modified phenolic resin, phenolic acid modified bamboo terpene resin.

Furthermore, in addition to the above-mentioned resin, optional coloring agents such as pigments and dyes may be added to the hener of the present invention. , for example, carbon black, nigrosine dye, aniline blue, nonorco Δil blue, chromium]2row, 1ral I ~ ramalin blue, Te'bon oil red, quinolin E 1
．． 1 +-'I-, methylene blue chloride 1~, lid 1
] Cyanine Flu, Marano Jite Greens Killylate, Lamp Black, Oil Black, Azo-Kil Black, Rose Pencil and Zonera.

In the present invention, [Henner] may further contain a magnetic material and be used as a magnetic material.

The magnetism contained in the magnetic 1 hener of the present invention is chemically stable, and furthermore, it is desirable that the particle size of fine particles of 1 μ or less be easily dispersed into 1 q. ) is most preferred. Representative magnets 11
Also (for the moon 4141 with good magnetization i1, Copal 1~,
? Ku, nickel J, 4f metal nialiumum,] Hahal-1 copper, iron, 1 (), magnesium, nickel, soot, zinc, antimony, helium, hismuth, no J [
・Mium, calcium, manganese, relene, titanium, tungsten, vanadium J: Alloy J3 of metals and U compounds of A, aluminum oxide, halide ore, copper oxide, diurium oxide, zinc oxide, titanium oxide, J, metal compounds including metal fusions such as magnesium arsenide; refractory nitrides such as vanadium didide and chromium didide; carbides such as tungsten carbide J5 and silica carbide:)
Examples include I-1 to A3, mixtures thereof, and the like.

It is desirable that these ferromagnetic materials have an average particle size of about 0.1 to 1 μm, and in order to prevent them from being contained in the toner (J
About 50-300 parts by weight per 100 parts by weight of the resin component, particularly preferably 100 parts by weight of the resin component.

It is 200 parts by weight.

To use the above-mentioned Hener as a one-component developer] Hener may be used alone, but when used as a two-component developer such as non-magnetic HENER, it is used in combination with the known HENNER. In addition, the toner of the present invention may also contain J, a superplasticizer, etc., if necessary.
The fluidizing agent is preferably a fine powder of hydrophobic silica, titanium oxide, aluminum oxide, etc., and the amount used is 0.0.
1 to 1 part by weight is preferred.

A method of forming a latent image by, for example, electrophotography using a developer containing the 1-ner of the present invention will be described below. As a photoreceptor, a selenium photoreceptor, a selenium telluride photoreceptor, or an inorganic photoconductive material 1 such as zinc oxide, cadmium oxide, selenium oxide, hemium oxide, lead oxide, mercury sulfide, etc. is bound. A photoreceptor, in which a photosensitive layer dispersed in a resin with V zein and an anthraL or Iin 1, is disposed on a conductive support via an intermediate layer consisting of an ammonia/treated zein as required. ] 1, poly-N vinyl carbazole, etc., is optionally contained in the binder resin, and the photosensitive layer is optionally casein, a water-soluble polymer compound, etc. A photoreceptor is used, which is placed on a conductive support through an intermediate layer consisting of a photoreceptor. For example, on the surface of the photosensitive layer of such a photoreceptor, ][ko)~ron or Scoro! ~The entire surface is charged by corona discharge using a Ron charger, and then imagewise exposure is performed using C light or the like to form an electrostatic latent image on the surface of the photosensitive layer. Next, this electrostatic latent image is developed with the developer according to the present invention by, for example, a magnetic brush method to form a toner image. This one
- The toner image is transferred to the transfer body under, for example, electric discharge, but is also transferred to the transfer body by adhesive transfer. The image transferred to this transfer member is transferred onto the transfer member by, for example, a hot plate fixing method, a hot roll fixing method, a pressure fixing method, or a flash fixing method. Similar handling can be applied to cases where latent images for electrostatic recording are created without using electrophotography.

The present invention will be explained below with reference to Examples, but the present invention is not limited to these examples. Naa
3 "Part 1 below" and fJ, unless otherwise specified.
Shows "heavy center".

Example 1 Borisdirene 100 parts by weight Carbon black 10jl Charge control agent
2 II magnetite (0,1μ) 100 no!
The mixture was heat-detailed with a hot roll, cooled, and then crushed and dispersed to obtain a volume average particle size of 12μ and a temperature resistance of 4X10.
``1qI of magnetic l-ner of Ω・Cl1l. Next, 7n
An electrostatic latent image formed on an O photoreceptor using a well-known electrophotographic method was developed using a developing device, transferred to plain paper while applying a corona discharge, and heat-fixed, resulting in a clear copy with no white spots. Image obtained.

Example 2 Polynisdel resin 100 parts by weight Carbon black 10! ! A mixture consisting of 1 J of charge control agent 2 was heated and kneaded using a hot roll to obtain a non-magnetic toner having a volume average particle size of 12 μm.

Apply this toner to
1 and 3, and used it as a developer.

This developer was placed in a magnetic 7-shield developing device to develop an electrostatic latent image formed on a photoreceptor of a J machine by a conventional electrophotographic method. Repeat this pro-wrestling test for 100,000 sheets/
A clear copy image was maintained even after ζ.

Example 3 Epoxy resin 100 heavy duty control agent
3 I + magnet tie 1~
100! ) An electrostatic latent image formed on an organic photoreceptor by ordinary electrophotography is developed (φ) in a developing device, transferred to plain paper while applying a corona discharge, and heat-fixed. You can get clear and complex images without snoring!

Example 4 A mixture consisting of 100 parts by weight of styrene-acrylic resin, carbon black 101I, and 3n control agent was treated in the same manner as in Example 1 to obtain non-magnetic 1-3 particles having a volume average particle diameter of 12μ.゜Please use this toner):)217
3 parts by weight were mixed with 100 parts by weight of Lia to form a yA@ agent.

This developer was subjected to the same tests as in Example 1, and a clear image was layered.Patent applicant: Ricoh Co., Ltd. Patent attorney: Hidetaka Komatsu

Claims (1)

[Claims] Token-0 for electric latent image imaging, characterized in that a compound represented by the following formula is contained in 1-Q as a charge control agent.