Abstract:
The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1×103 to about 5×104 (Pa·s) at a temperature ranging from about 100° C. to about 140° C.; and a storage modulus Pa (dG′) to a loss modulus Pa (dG″) (dG′/dG″) ratio of about 1.10 to about 1.25.
Abstract:
A process for producing a polymerized toner, comprising the step of polymerizing a polymerizable monomer composition containing a polymerizable monomer and a colorant in the presence of a polymerization initiator in an aqueous dispersion medium to form colored polymer particles, the process comprising the steps of mixing the polymerizable monomer with the colorant to prepare a polymerizable monomer mixture having an initial viscosity of 10 to 3,000 mPa·s or 0.3 to 1 mPa·s as measured at 25° C. by a Brookfield type viscometer, and then feeding the polymerizable monomer mixture to a media type dispersing machine to finely disperse the colorant by the media type dispersing machine, thereby preparing a dispersed polymerizable monomer mixture having a viscosity after the dispersion, the ratio of increase in viscosity of which is 1.0 to 10 times or 100 to 2,000 times as high as the initial viscosity.
Abstract:
The present invention relates to a color toner for a nonmagnetic mono-component printing system that improves the printing characteristics, and a preparation method thereof. More specifically, the present invention provides a color toner including a first coating layer and a second coating layer formed on a toner mother particle, wherein the first coating layer contains coated organic powders where two kinds of organic powders are coated with each other, and the second coating layer contains coated inorganic powders where silica and titanium dioxide are coated with each other. The color toner of the present invention has a narrow charge distribution, good image density, high transfer efficiency, excellent long-term stability, and reduced PCR contamination, thereby being good for use in high speed color printers, etc., employing a direct type or a tandem type of transfer system.
Abstract:
Provided are a latex process and a toner process, both of which include the preparation of a latex having weight average molecular weight of from about 12×103 to about 24×103. The latex is manufactured under monomer-starved polymerization condition such as monomer feeding rate equal to or less than 0.516% per minute by weight of the monomer(s) to be fed. The toners prepared according to the present disclosure have gained improved properties such as gloss, fusing performance, crease performance, stripping performance, document offset, vinyl offset, and parent charging etc.
Abstract:
A producing method of resin particles, which comprises at least an emulsification step of emulsifying a composition containing at least a polymerizable monomer and a polymerization step to form droplets of the composition, and a polymerization step of polymerizing the polymerizable monomer in the droplets to synthesize resin particles, wherein the composition is one selected from Composition A, Composition B, or Composition C: (Composition A): a composition containing a vinyl-based monomer, lactone, a vinyl-based monomer polymerization catalyst for polymerizing the vinyl-based monomer, and a lactone polymerization catalyst for polymerizing the lactone (Composition B): a composition containing a polyester resin, lactone, and a lactone catalyst for polymerizing the lactone (Composition C): a composition containing a vinyl-based monomer, a cyclic keteneacetal compound represented by the following general formula (1), and a radical polymerization initiator (in the general formula (1), R represents a chain or cyclic divalent aliphatic group optionally containing an ether linkage, and the aliphatic group may have a substituent.)
Abstract translation:一种树脂颗粒的制造方法,其至少包括乳化含有至少可聚合单体的组合物和聚合步骤以形成组合物的液滴的乳化步骤,以及使可聚合单体在液滴中聚合以合成树脂的聚合步骤 颗粒,其中所述组合物是选自组合物A,组合物B或组合物C的组合物:(组合物A):包含乙烯基类单体,内酯,用于使乙烯基类单体聚合的乙烯基类单体聚合催化剂的组合物, 和内酯聚合用内酯聚合催化剂(组合物B):含有聚酯树脂,内酯和内酯的内酯催化剂的组合物(组合物C):含有乙烯基类单体的组合物,代表的环状烯酮缩醛化合物 通过下述通式(1)和自由基聚合引发剂(在通式(1)中,R re 呈现任选含有醚键的链或环状二价脂族基,脂族基可以具有取代基)
Abstract:
To provide a method for producing a toner in which at least monomers are polymerized in at least one of a supercritical fluid and a subcritical fluid to thereby produce toner particles, wherein at least one of the supercritical fluid and the subcritical fluid contains a fluorine-containing surfactant, and a polymer resulted from polymerization of the monomers is insoluble in at least one of the supercritical fluid and the subcritical fluid, and provide a toner produced by the method for producing the toner.
Abstract:
Provided are a latex process and a toner process, both of which include the preparation of a latex having weight average molecular weight of from about 12×103 to about 24×103. The latex is manufactured under monomer-starved polymerization condition such as monomer feeding rate equal to or less than 0.5166% per minute by weight of the monomer(s) to be fed. The toners prepared according to the present disclosure have gained improved properties such as gloss, fusing performance, crease performance, stripping performance, document offset, vinyl offset, and parent charging etc.
Abstract:
To provide a black toner having excellent charging property and transferring property against a severe environmental change. The black toner includes toner particle containing at least a binder resin, carbon black and a releasing agent, wherein: the toner particles have a weight-average particle diameter of 3.5 to 8.0 nullm; total amount of acid value and hydroxyl value of the toner is 30 to 75 mgKOH/g; average circularity of particles contained in the toner having circle-equivalent diameter of 2 nullm or more is 0.915 to 0.960; loss tangent tan null(103 to 104 Hz) of the toner is represented by the following expression: tan null(103 to 104 Hz)null0.0060 where the loss tangent tan null is represented by nullnull/nullnull where nullnull denotes dielectric loss factor and nullnull denotes dielectric constant, and tan null(103 to 104 Hz) denotes the loss tangent in a frequency range of 103 to 104 Hz; and a ratio of tan null(105 Hz) to tan null(5 X 104 Hz) is represented by the following expression: 1.05 nulltan null(105 Hz)/tan null(5null104 Hz)null1.40 where tan null(105 Hz) denotes loss tangent at the frequency of 105 Hz and tan null(5null104 Hz) denotes loss tangent at the frequency of 5null104 Hz.
Abstract:
Disclosed are a toner for developing an electrostatic latent image and a method of preparing the toner. The toner may include a latex, a colorant and a releasing agent, and may further include sulfur (S), iron (Fe) and silicon (Si). The [S]/[Fe] ratio may be within the range between about 5.0×10−4 and about 5.0×10−2. The [Si]/[Fe] ratio may be within the range of between about 5.0×10−4 and about 5.0×10−2. [S], [Fe] and [Si] are the amounts of S, Fe and Si measured by X-ray fluorescence spectrometry, respectively.
Abstract:
The present disclosure relates to a toner process comprising providing a resin miniemulsion comprising polymeric particles comprising at least one free radical polymerizable monomer compound and at least one alkylene anhydride; blending the miniemulsion with at least one colorant, at least one amine, and optionally at least one wax; heating the resulting mixture below or about equal to the glass transition temperature (Tg) of the resin emulsion; and heating the resulting mixture above or about equal to the glass transition temperature (Tg) of the resin emulsion.