• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1495554 Coated magnetic particles SUBLISTATIC HOLDING SA 28 Nov 1974 [30 Nov 1973] 51641/74 Heading C1A [Also in Divisions B2 and G2] An electrophotographic developer comprises magnetic cores each covered with an organic substance which contains a dyestuff which vaporizes at a temperature between 100‹ and 220‹ C. at atmospheric pressure. The cores may be particles of iron or magnetic alloys, or oxides of cobalt, nickel or iron, with an average particle size of 0À5 to 10 microns. In the examples: core materials used are iron powder, magnetite and a mixture thereof; core coating materials used are polyvinyl acetate, polyamides and ethyl cellulose; and a number of known dyes, including mixtures of dyes, are used. Surfactants, and especially anti-static agents, may be mixed with the developer. The developer may be prepared by spray drying a dispersion of the magnetic cores and the dyestuff in a solution of the coating material, or by coating the cores and subsequently dyeing the coating.
    公开号:SU1238739A3
    申请号:SU742081039
    申请日:1974-11-29
    公开日:1986-06-15
    发明作者:Мель Вольфганг；Хендрикс Дитер
    申请人:Сублистатик Холдинг Са (Фирма)；
    IPC主号:
    专利说明:


    The invention relates to electrophotography, in particular to electrophotographic detectors for display using the magnetic brush method.
    The aim of the invention is to make copies at high temperatures.
    The proposed developer contains ferromagnetic grains coated with a layer containing a polymeric binder and a dye. As ferromagnetic grains, use is made of iron, ferromagnetic alloys and oxides of cobalt, nickel, etc. The grain size ranges from 0.5 to 10 microns. To coat ferromagnetic grains, a polymeric binder is chosen, for example, from polysaccharide ethers and esters, in particular cellulose ethers and esters, such as cellulose acetate or acetobutylate, ethyl or benzylcellulose, polyamides, polyethers, polyolefins and gums. Preference is given to polymeric binders having the greatest affinity to dyes which are part of the layer covering the ferromagnetic grains. Dyes are also azo dyes, for example, anthraquinone derivatives, quinonphthalene derivatives, styryl di- and terephenylmethy derivatives, new krasited, oxazine or thiazine derivatives, xantenone, lithenyl and azometenyl acridine and diazine derivatives, etc. Preference is given to dyes containing at least three substituents different from each other.
    The sublimation temperature at atmospheric pressure of these dyes is 100-210 ° C.
    . Ferromagnetic grains are coated with polymer binder and dye in any way, for example, by dipping, spraying, stirring the grains with a solution of the coating composition in a keg or using a fluidized bed under control. The fluidized bed method, under control, allows an even coating to be applied to ferromagnetic zeria. It is advisable that the coating thickness should not be several microns corneous, since a thickness of 2-10 microns is sufficient to ensure the physical integrity of the coating and for a sufficient amount of dyes to obtain darker copies.
    387392
    Thus, three pro- ducers are obtained that allow color copies to be produced, using hydroxyquinonephalon as a yellow dye.
    5 as a red dye — 1-amino-2-phenoxy, 4-hydroxyanthraquinone, as a blue dye — 1, A-dioxy-5-amino-3-isopropylamino-anthraquinone. The addition of colorants to the coating is carried out before or after coating.
    Ferromagnetic grains choose S depending on their size and the ferromagnetic material used.
    5 It is advisable to add an antistatic agent to the developers, preventing the agglomeration of particles, or various auxiliary agents that preserve the realistic properties of the manufacturers, such as
    0 as colloidal pyrogenic silicic forms, which can contribute to the fineness of particles of the order of 0.5 microns and less.
    Example 1. Mix portions of livinylacetate with 6 parts of three-four-oxide iron. Using a fluidized bed apparatus, a powder consisting of ferromag. Three to four oxide iron grains coated with a polymer binder have an average diameter of 15 µm. The diameter of 99% of the grains is 2.5 above and below 30 microns. For 2 hours, this powder is mixed with 0.205 parts of the red dye 1-am5 but 4-hydroxy-2-0 methoxy-ethyloxyanthraquinone, the particle diameter of which is on average 1 micron. The mixture was then incubated for 10 hours at 60 ° C, and then treated for 2 hours.
    0 together with 0,052 h. Antistatic (Sava-0-Gfade Ш5). The resulting developer is used to develop a latent image obtained by an electrophotographic method on photoconductive zinc oxide-based paper using the magnetic brush method. I
    The developed image was fixed by heating (for several seconds at 140 ° C), pressed out to soften the polymer, and then transferred to a receiving plate 25 µm thick. For this, zinc oxide-based paper and the receiving plate are heated together for 10 s at a pressure of SII1. The creeping red image is clear, has good color quality and does not have stains in the ground cover.
    The need for additional coverage is eliminated. Optical density of 1: 5.
    PRI mme R 2. According to example 1, a powder consisting of ferromagnetic grains in the amount of 57, 59 parts by weight, coated with polyvinyl acetate, in an amount of 40 parts by weight is obtained. This powder is ground in a Turbula apparatus with 3.01 mash. blue dye of the structural formula
    ABOUT
    , ISH-CH (CH,) I
    H-CH # 3)
    about
    reaching a particle diameter of an average of 1 micron. The mixture is heated for 16 hours at 60 ° C, then, after cooling, 0.052 g of hydrophobic substance is added. The manufacturer has free flow. This developer is used to show a latent electrostatic image obtained on photoconductive paper based on opium zinc. A blue reproduction of the original is obtained; transfer is carried out alternately by simply heating the blue dye of the paper onto the receiving paper.
    Analogously to example 1, the obtained blue image is distinguished by high clarity, has a good quality of color, and has a spotted spot in the ground coat. The need for additional fixation is eliminated.
    Instead of the dye described above, you can use 3 ma.h. 1-amino-4-isopropylaminoquinizarin.
    EXAMPLE 3. An applicant is received, based on 18.308 ma.ch. polyamide low mol. veeea, ferromagnetic. grains (Fe + F, ej04) 73.235 wt.h. average values of 0.03-0.06 microns and 3.97 mas. dye.
    For this, Versamide is dissolved in a 50% n-propyl alcohol, dispersing ferromagnetic grains in a ball mill.
    The dispersion is spray dried to obtain, upon evaporation of the solvent, a dry powder, which is from ferromagnetic grains (magnet) coated with a polymeric binder. After this, an air sieve separates that fraction of particles that are within the required range. Approximately 20% of all particles are retained. The average particle diameter is 12 microns.
    This powder is perediergiruyut in one solution (1% -nrm) antistatic agent, so that the particles of the developer did not charge each other during friction, which would cause seizures during the development of an electrostatic image. To 96 parts of the resulting dispersion was added 4 hours. yellow dye structural form
    (ABOUT
    15
    Oh with
    (P)
    N
    ABOUT
    0
    8 parts of a red dye (for example 1,4-dimethylamino-anthraquinone and 1,5-dioxy-4,8-diamino-anthraquinone methyl bromide) and 0.5 part of TEEPOL agent. Everything is stirred for 2 hours, then filtered and dried for 3 hours at 700.
    The dry powder thus obtained is then mixed with 0.48 parts of the agent AEROSIL.
    Thus, a developer is obtained, which is used to produce a latent electrostatic image obtained on photoconductive zinc oxide based paper, and a black reproduction of the original of maximum optical density 2.0 is obtained.
    EXAMPLE 4 A developer is received, based on 27.397 m.ch. polyamide low mol. weight and 63,926ma.ch. iron glands, the average diameter of which varies in the range of 0.03 - 0.06 microns, and 8.219 mas. dye.
    For this, first a solution (30%) of vereamide in ethanol is prepared (98%), in which magnetite is dispersed using a ball mill. This dispersion is spray dried in a disintegrator at an inlet air temperature of 150 ° C. A dry powder is obtained, which is made of polyamide particles, in which there are ferromagnetic grains. Analogously to example 3, particles of an average size of 2 microns were separated.
    This powder is redisputed in 10 hours, an aqueous dispersion containing 0.1 parts. IRGASOL DAM, 0.9 and 0.05 parts. AEROSIL 200. This dispersion is
    pulverized again to obtain a dry powder which allows the use of a magnetic brush to show a hidden image. Color images of optical density up to 1.5 are obtained.
    Froze A manufacturer is received, the outcome of 28.5 ma.ch. polyamide low mol. weight, VERSAMID 962, 1.55 mach. dye and 70.0 mac. ferromagnetic grains. Make a solution (30%), in which the dye and magnetite are dispersed using a ball mill in the following ratio of scientific research institutes, wt.h .: versamid 28.5; magnetite 70 and a dye of 1.55. In addition, 0.75% of the AEROSIL 200 agent is added to this dispersion. The dispersion is spray dried, the temperature of the incoming air is 150 ° C. A dry powder is obtained consisting of a polyamide in which there are ferromagnetic grains. Analogously to Example 3, a fraction of these particles, the average value of which is 12 microns, is separated using an air sieve. Using a counting device, it is determined that after separation, 0.7 hours have a diameter below 3 microns, and 0.5 hours has a diameter of 30 hours. ,
    This powder with a content of 1.53 wt. dyes are used for
    Editor N.Ivshchka Order 3311/61
    Compiled by L.Nosyreva Tehred I.Veres
    Corrector
    Circulation A36 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
    electrostatic imaging by magnetic brush method. According to the proposed method, the powder is very good for producing a latent electrophotographic image, if instead of 28.5 mas. Hours, versamide takes 9.5 mas. Hours. ethyl cellulose. In this case, the dye content in the resulting developer is 1.89%.
    Example Example 3 shows the acquisition of a developer for reproducing images of a desired color, in particular black. This manufacturer is produced by mixing the primary colors. The same effect is achieved by mixing three primary color manufacturers: blue-green, yellow, and magenta.
    You can also get a dark green image with a mixture of 1 part yellow and 2 hours. blue green pro wittel.
    These pro- tutors, as in. Example 4. In the Turbula apparatus (R) they are mixed for 1 hour. A black image can be obtained by mixing the developers obtained according to Example 5 in the following ratios: 10h. about a wittel with a yellow dye 40h. Vitel with blue-green dye; 50 h, about a wittel with a purple dye.
    Proofreader A.Zimokosov
    权利要求:
    Claims (1)
    [1]
    ELECTROPHOTOGRAPHIC DEVELOPER FOR MANIFESTING THE IMAGE OF ME
    MAGNETIC BRUSH TODOM, containing ferromagnetic grains coated with a coating layer containing a polymer binder and a dye, characterized in that, for the purpose of making copies at high temperatures, it contains a dye of the anthraquinone class, which has a sublimation temperature at atmospheric pressure of 100-210 ° C in the following ratio of components, wt.h .: Binder 10- ^ 40
    Dye 1-10
    Ferromagnetic ’Grains
    The rest <-> 1238739 AZ
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1238739A3|1986-06-15|Electrophotographic developer for developing picture by &#34;magnetic brush&#34; method
    US4251611A|1981-02-17|Process for formation of permanent image
    US4536462A|1985-08-20|Encapsulated particulate magnetic development powders containing a sublimable dyestuff
    US4262078A|1981-04-14|Light transmitting particle for forming color image
    US5021314A|1991-06-04|Colored magnetically attractable toner powder
    JP2584450B2|1997-02-26|Electroscopic toner containing rhodamine ester dye and erasing dye therefor
    US4284696A|1981-08-18|Light transmission particle for forming color image
    US4238562A|1980-12-09|Light transmission particle for forming color image
    GB2184858A|1987-07-01|Colour toner for use in electrophotography
    US4599289A|1986-07-08|Pressure-fixable encapsulated toner
    US4121932A|1978-10-24|Electrophotographic process involving dye transfer imagewise
    DE3414951C2|1990-06-13|
    JP3458166B2|2003-10-20|Magenta toner for developing electrostatic latent images
    US3428452A|1969-02-18|Photoconductive compositions and electrophotographic recording elements made therefrom
    DE60212050T2|2007-01-11|Charge control resin particles and electrostatic image development toner
    US7429441B2|2008-09-30|Electrostatic charge developing toner
    US3658675A|1972-04-25|Photoelectrophoretic imaging processes using bisazo pigments
    JP2764606B2|1998-06-11|Toner for developing electrostatic images
    US5286592A|1994-02-15|Electrostatographic toner containing cyan pigment
    US5124223A|1992-06-23|Magnetic carrier cores coated with perfluorinated Werner complexes and developers containing the same
    US5292621A|1994-03-08|Electrostatographic toner containing yellow pigment
    JPH0614191B2|1994-02-23|Photoconductive toner
    JP2801755B2|1998-09-21|Positive charging toner for electrophotography
    JP2000338722A|2000-12-08|Electrophotographic magenta toner
    US4978595A|1990-12-18|Photoconductive toner containing polymeric-magnetic coordination complex
    同族专利:
    公开号 | 公开日
    NL175673C|1984-12-03|
    FR2253230B1|1983-01-14|
    CA1046331A|1979-01-16|
    IT1023422B|1978-05-10|
    FR2253230A1|1975-06-27|
    NL175673B|1984-07-02|
    CH584920A5|1977-02-15|
    IL46063D0|1975-02-10|
    ZA747366B|1975-12-31|
    NL7415624A|1975-06-03|
    ES432415A1|1977-01-01|
    IL46063A|1978-01-31|
    BE822753A|1975-05-29|
    CS214866B2|1982-06-25|
    DE2452530B2|1978-11-02|
    DD117758A5|1976-01-20|
    SE419803B|1981-08-24|
    SE7414937L|1975-05-31|
    JPS5087652A|1975-07-14|
    DE2452530A1|1975-06-12|
    AU7554174A|1976-05-20|
    JPS5820B2|1983-01-05|
    GB1495554A|1977-12-21|
    BR7410013A|1976-05-25|
    US4246331A|1981-01-20|
    HK52482A|1982-12-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3060051A|1958-11-25|1962-10-23|Rca Corp|Method of fusing powder images|
    DE1249089B|1962-04-04|1967-08-31|
    NL159795C|1968-07-22|Minnesota Mining & Mfg|
    ZA765807B|1975-10-07|1977-09-28|Sublistatic Holding Sa|Developers|CH586410A5|1974-01-09|1977-03-31|Sublistatic Holding Sa|
    ZA765807B|1975-10-07|1977-09-28|Sublistatic Holding Sa|Developers|
    AU499347B2|1975-11-06|1979-04-12|Subligraphics S.A.|Spray dried magnetic developer|
    US4105572A|1976-03-31|1978-08-08|E. I. Du Pont De Nemours And Company|Ferromagnetic toner containing water-soluble or water-solubilizable resin|
    CH613159A5|1976-07-09|1979-09-14|Sublistatic Holding Sa|
    JPS56776B2|1976-07-27|1981-01-09|
    US4395472A|1981-06-19|1983-07-26|Robillard Jean J|Plain paper reproduction process|
    US4420307A|1982-06-28|1983-12-13|E. I. Du Pont De Nemours & Co.|Printing process|
    US4421518A|1982-06-28|1983-12-20|E. I. Du Pont De Nemours & Co.|Printing process|
    US4421517A|1982-06-28|1983-12-20|E. I. Du Pont De Nemours & Co.|Printing process|
    US4421515A|1982-06-28|1983-12-20|E.I. Du Pont De Nemours & Co.|Printing process|
    US4434007A|1982-08-04|1984-02-28|Armstrong World Industries, Inc.|Process for reproducibly preparing uniform dry ink compositions comprising water-soluble cationic dyestuffs|
    JPS59100451A|1982-11-30|1984-06-09|Mita Ind Co Ltd|One-component type red magnetic developer|
    EP0145717A1|1983-06-10|1985-06-26|KemaNord AB|Method for preparing an electrophotographic toner|
    FI78514C|1983-12-16|1989-08-10|Sicpa Holding Sa|TRANSFERTRYCKPLATTA, FOERFARANDE FOER DESS FRAMSTAELLNING, TRYCKSVAERTA FOER ANVAENDNING I FOERFARANDET SAMT TRANSFERTRYCKNINGSFOERFARANDE FOER ATT TRYCKA TEXTILUNDERLAG MEDELST TRANSFERTRYCKPLATTAN.|
    JPS6341061B2|1986-05-16|1988-08-15|Konika Kk|
    JP2918118B2|1989-09-04|1999-07-12|新日本製鐵株式会社|Textile printing equipment|
    US5124217A|1990-06-27|1992-06-23|Xerox Corporation|Magnetic image character recognition processes|
    JP3101139B2|1993-12-24|2000-10-23|富士写真フイルム株式会社|Index photo, film package, package creation method and creation machine|
    US6143454A|1998-05-01|2000-11-07|International Communications Materials, Inc.|Color toner containing sublimation dyes for use in electrophotographic imaging devices|
    US20070054211A1|2005-09-07|2007-03-08|Nu-Kote International, Inc.|Chemically derived toner containing sublimation dyes|
    US10192660B2|2010-07-02|2019-01-29|Sri Lanka Institute of NanotechnologyLtd.|Process for preparation of nanoparticles from magnetite ore|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH1683173A|CH584920A5|1973-11-30|1973-11-30|
    [返回顶部]