摘要:
The present invention relates to a developer for developing electrostatic latent images, which comprises:a toner containing a binder resin being a thermoplastic resin composed of a copolymer of styrene and acrylic acid ester and/or methacrylic acid ester, with 6.ltoreq..eta.(110)/.eta.(130).ltoreq.25 (where .eta.(110) represents the melting viscosity at 110.degree. C., and .eta.(130) the same at 130.degree. C.), and carbon black having pH 6 or above; anda carrier having its magnetic core coated with a polyolefinic resin, the carrier's core content being 94-99% by weight, the weight average molecular weight of the polyolefinic resin 5.times.10.sup.4 -3.times.10.sup.5 and the carrier's electric resistance 1.times.10.sup.7 -1.times.10.sup.12 .OMEGA..cm, with 1-15% by weight of electrically conductive fine particles in proportion to the polyolefinic resin added thereto.
摘要:
The present invention relates to a toner for developing electrostatic latent images comprising:a core particle comprising resin with 1,000-100,000 in number average molecular weight (Mn.sub.1),an intermediate layer coating the core particle and comprising resin with 5,000-300,000 in number average molecular weight (Mn.sub.2) and,an outermost surface layer coating the intermediate layer and comprising resin with 10,000-1,000,000 in number average molecular weight (Mn.sub.3);the number average molecular weights Mn.sub.1, Mn.sub.2 and Mn.sub.3 satisfies the relationship of;Mn.sub.1
摘要:
This invention relates to toner for the development of electrostatic latent images comprisinga core particle comprising at least styrene-acrylic copolymers or polyester resins,an intermediate layer coating the core particle and comprising at least styrene-acrylic copolymers, andan outermost surface layer coating the intermediate layer and comprising at least styrene-acrylic copolymers, the contents (%) of the styrenic monomer component in styrene-acrylic copolymers of which the core particles, the intermediate layers and the outermost surface layers are formed being in specified relationships.
摘要:
The present invention provides a carrier coated by a polymer particle layer containing fine magnetic particles around a magnetic core, which may contain an electrical charge controlling agent, and the core may be pre-treated with a coupling reagent; the carrier gives excellent clearness to the copy and durability at repeating use.
摘要:
The present invention relates to a developer for developing electrostatic latent images obtained by mixing toner particles comprising a binder resin and a coloring agent with fine magnetic particles treated by hydrophobic agent.
摘要:
The present invention relates to a toner for developing an electrostatic latent image, comprising a calix arene compound expressed by the following general formula �I!: ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom, an alkyl group having a carbon number of 1 to 5, or --(CH.sub.2).sub.m COOR.sub.3 (in which R.sub.3 represents a hydrogen atom or a lower alkyl group; and m represents an integer of 1 to 3); n represents an integer of 0 to 7.The present invention further relates to a charge-giving member comprising a calix arene compound expressed by the foregoing general formula �I!.
摘要:
The present invention relates to a toner for developing an electrostatic latent image, comprising a calix arene compound expressed by the following general formula �I!: ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom, an alkyl group having a carbon number of 1 to 5, or --(CH.sub.2)mCOOR.sub.3 (in which R.sub.3 represents a hydrogen atom or a lower alkyl group; and m represents an integer of 1 to 3); n represents an integer of 0 to 7. The present invention further relates to a charge-giving member comprising a calix arene compound expressed by the foregoing general formula �I!.
摘要:
The present invention provides a toner for developing electrostatic latent images prepared by the following processes comprising;a process (a) of forming particles for toner containing at least a resin and a coloring agent in a wet process,a process (b) of aggregating the particles, anda process (c) of the aggregates passing through a minimal gap of 0.5-10 mm under dispersed conditions in air-stream flowing at a high speed to pulverize the aggregates, the gap being formed between a rotator and a rotator or between a rotator and a stator.
摘要:
In toner for developing an electrostatic latent image, at least an organic charge-controlling agent having a BET specific surface area of 15 to 80 m.sup.2 /g and inorganic fine particles having a BET specific surface area of 10 to 150 m.sup.2 /g are fixed and/or film-formed on the surface of core particles mainly composed of thermoplastic resin.
摘要:
Toner for use in a non-contact heat fusing apparatus. Toner includes a binder resin, a colorant and acicular particles of wax. In a preferred embodiment, the toner includes a carbon black graft polymer obtained by reacting carbon black and a polymer which is reactive with the carbon black.