CN103869644A - Polyester type color powdered ink and preparation method thereof - Google Patents
Polyester type color powdered ink and preparation method thereof Download PDFInfo
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- CN103869644A CN103869644A CN201410072727.0A CN201410072727A CN103869644A CN 103869644 A CN103869644 A CN 103869644A CN 201410072727 A CN201410072727 A CN 201410072727A CN 103869644 A CN103869644 A CN 103869644A
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Abstract
The invention relates to a polyester type color powdered ink and a preparation method thereof, aiming at solving the problems that existing polyester type color powdered ink is poor in environmental adaptability and degraded in performance, so that the printing effect is influenced. The polyester type color powdered ink has a shell-core structure; the core of the shell-core structure is formed by agglutination particles obtained by agglutinating a wax-containing polyester composite emulsion A and a colorant-containing polyester composite emulsion B, and the shell of the shell-core structure is formed by coating the surface of the agglutination particles with a composite emulsion C containing a charge control agent by agglutination. The method comprises the steps of adding a flocculating agent into the composite emulsion A and the composite emulsion B to obtain the core particles, further coating the core particles with the composite emulsion C containing the charge control agent, and carrying out agglutination to obtain the polyester type color powdered ink with the shell-core structure. The preparation method of the polyester type color powdered ink is simple in technology, is good in charge quantity and good in adaptability to high temperature and high humidity environments, has low glass transition temperature, fusing temperature and development density, high charge quantity and narrow charge distribution, and is low in bottom ash and waste dust rate during printing.
Description
Technical field
The present invention relates to a kind of color toner and preparation method thereof, specifically a kind of polyester-type color toner and preparation method thereof.
Background technology
Color toner is that color laser printing, colored digital duplicate required crucial consumptive material, along with developing rapidly of office automation, duplicating machine to xerography and the demand of printer sharply increase, and people also have higher demand to image quality and the speed printed, duplicate.Generally speaking, xerography refers to and on photoreceptor, forms electrostatic latent image, with ink powder, sub-image is developed subsequently, then transfers images to paper etc. by fixing film, utilizes the method for hot-pressing roller heat fixer to carry out.Current common hot-pressing roller photographic fixing mode need to be melted the binder resin in ink powder, thereby need higher temperature to cause high-octane consumption, be unfavorable for energy-conserving and environment-protective requirement, thereby invent a kind of ink powder of applicable low-temperature fixing performance, can effectively reduce energy consumption, both reduce printing cost, met again environmental requirement.In order to meet the requirement that reduces fixing toner temperature, effective method is to select to have the binder resin that melts performance compared with high precision as bonding agent up to now, vibrin can meet this specific character requirement just, so for low-temperature fixing development trend, people have carried out large quantity research and trial to vibrin is applied in color toner manufacture.Polyester binding resin is produced by dibasic acid, dibasic alcohol polycondensation conventionally, and adopt polyprotonic acid to carry out cross-linking reaction to improve the strength character of resin, thus in polyester molecule structure with abundant functional group, this structure is conducive to improve the carried charge of ink powder, but abundant functional group causes the hydroscopicity of polyester very strong simultaneously, prepared ink powder is poor at environmental suitability, and particularly in hot and humid environment, carried charge sharply reduces, thereby makes ink powder performance degradation affect printing effect.Researchist considers to add charge adjusting agent to regulate the carried charge of its ink powder at the polyester complex emulsions A of the content of wax with containing in the polyester complex emulsions B of colorant, but when actual use, there is the problem of charge adjusting agent skewness, can not fundamentally solve that ink powder moisture absorption is strong, environmental suitability is poor, the problem that particularly carried charge sharply reduces in hot and humid environment.
Summary of the invention
The object of the invention is in order to solve the problems of the technologies described above, provide a kind of carried charge good, good to environmental adaptation, particularly hot and humid environment is adapted to, has lower glass temperature and fixing temperature, there is good development density simultaneously, higher carried charge and narrow carried charge distribute, the bottom ash in printing, the useless very low polyester-type color toner of powder rate.
The present invention also provides a kind of preparation method of above-mentioned color toner, has advantages of that technique is simple, it is easy to control, carried charge is adjustable, production cost is low, reliability is high.
Color toner of the present invention has core-shell structure, take the polyester complex emulsions A of the content of wax and containing the agglutination particle obtaining after the polyester complex emulsions B aggegation of colorant as core, and make containing the complex emulsions C of charge adjusting agent further coated aggegation be shell on above-mentioned agglutination particle surface.
Described charge adjusting agent is zinc salicylate and/or salumin.
In described complex emulsions C, the mass percent of charge adjusting agent is 3-30%.
The preparation method of polyester-type color toner of the present invention, comprise polyester granulate, Wax particles are joined to dispersed with stirring in hot solvent, then add the aqueous solution that contains surfactant, carry out high speed shear dispersion, the solution fully disperseing is carried out to desolvation processing, obtain the polyester complex emulsions A of the content of wax;
Polyester granulate, colorant are joined to dispersed with stirring in hot solvent, then add the aqueous solution that contains surfactant, carry out high speed shear dispersion, the solution fully disperseing is carried out to desolvation processing, obtain the polyester composite solution B containing colorant;
Resin particle, charge adjusting agent are joined to dispersed with stirring in hot solvent, then add the aqueous solution that contains surfactant, carry out high speed shear dispersion, the solution fully disperseing is carried out to desolvation processing, obtain the resin compounded solution C containing charge adjusting agent;
Complex emulsions A and complex emulsions B are obtained to nuclear particle by adding flocculating agent aggegation, the further coated complex emulsions C containing charge adjusting agent, aggegation obtains possessing the polyester-type color toner of nucleocapsid structure.
Described charge adjusting agent is zinc salicylate and/or salumin.
In the polyester complex emulsions (A) of the content of wax, the mass percent of wax particle is 5-50%; In the described polyester complex emulsions (B) that contains colorant, the mass percent of colorant is 5-50%; The described mass percent containing charge adjusting agent in the emulsion of charge adjusting agent is 3-30%.
When described aggegation, add the polyester complex emulsions A of the content of wax to account for 10-60%, account for 10-50% containing the polyester complex emulsions B of colorant, account for 5-20% containing the complex emulsions C of charge adjusting agent, it is 100% that three adds up to percentage by weight.
Described complex emulsions (A) and complex emulsions (B) obtain nuclear particle by adding flocculating agent aggegation, in the time that the particle diameter of nuclear particle increases to 3-5 μ m, the further coated complex emulsions C containing charge adjusting agent, aggegation obtains possessing the polyester-type color toner of nucleocapsid structure.
In the present invention the optional toluene of the solvent that uses, ethyl acetate, acetone, chloroform, methylene chloride, dimethylformamide, dimethyl sulfoxide, paraphthaloyl chloride or their potpourri, ethyl acetate.
The vibrin using in the present invention can be unformed resin, the combination of crystal type resin or unformed resin and crystal type resin, as poly terephthalic acid dimethyl ester, poly terephthalic acid diethylester, polybutyl terapthalate, poly bisphenol resin, alkaline metal sulfonated polyester resin, poly-(ethylidene-adipate), poly-(propylidene-adipate), poly-(butylene adipate), poly-(pentylidene-adipate), poly-(hexylidene adipate), poly-(Ya Xinji-adipate), poly-(ethene-succinate), poly-(propylene-succinate), poly-(butylene-succinate), poly-(pentylidene-succinate), poly-(hexylidene succinate), poly-(succinic acid octene), copolymerization (propene-1-butene-ethylene glycol terephthalate), copolymerization (propene-1-butene-5-sulfo group-isophthalic acid ester), copolymerization (ethoxylation bisphenol-A-fumarate), copolymerization (ethoxylation bisphenol-A-5-sulfo group-isophthalic acid ester), copolymerization (ethoxylation bisphenol-A-maleate), copolymerization (ethoxylation bisphenol-A-5-sulfo group-isophthalic acid ester), copolymerization (ethene-ethylene glycol terephthalate) or copolymerization (ethene-5-sulfo group-isophthalic acid ester), the matter average molecular weight of selected vibrin is at 5000-250000, be preferably 10000-50000, weight-average molecular weight, at 7000-3000000, is preferably 20000-600000.Described in the present invention, containing the preferably styrene-acrylic resin of resin in the complex emulsions of CCA, can be also one or more in above-mentioned vibrin.
The wax using in the present invention can be the higher fatty acid amides such as natural series wax, oleamide or stearic amide such as the hydrocarbon waxes such as low molecular weight polyethylene wax, maleic anhydride modified Tissuemat E, low-molecular-weight polypropylene wax, low-molecular-weight copolyalkenamer wax, oxidized paraffin wax, paraffin, microcrystalline wax, stearic acid octadecyl ester, behenic acid 20 diester, beeswax, Brazil wax etc.
The colorant using in the present invention can be any of inorganic pigment or organic pigment, organic dyestuff, can be also its combination.The cyan colorant that can enumerate has pigment blue 15: 3, pigment blue 15: 4 etc.; Yellow colorants has pigment yellow 74, pigment yellow 93, pigment yellow 94, pigment yellow 155, solvent yellow 16 2, pigment yellow 180, pigment yellow 185 etc.; Pinkish red colorant has pigment red 31, pigment red 122, paratonere 150, paratonere 184, paratonere 185, paratonere 57:1, paratonere 238, paratonere 269 etc.; Black colorant has carbon black, magnetic iron ore etc.
Surfactant of the present invention can be anionic surfactant, cationic surfactant or non-ionic surfactant or its composition.
Cationic surfactant is at least one in amine salt cationic surfactant or quaternary ammonium salt cationic surfactant, and amine salt cationic surfactant is as primary amine salt, secondary amine salt, tertiary ammonium salt type surfactant, hydramine, diamines or polyamines, containing amine, the guanidine derivatives of acyl group, the quaternary ammonium salt cationic surfactant that can enumerate has: DTAC, hexadecyltrimethylammonium chloride, OTAC, dodecyl benzyl dimethyl ammonium chloride, cetalkonium chloride, stearyl dimethyl benzyl ammonium chloride, DTAB, cetyl trimethyl ammonium bromide, Cetyltrimethylammonium bromide, dodecyl dimethyl benzyl ammonium bromide, cetyl dimethyl benzyl ammonium bromide, octadecyl dimethyl benzyl ammonium bromide, hexadecyldimethyl benzyl ammonium allyl ammonium chloride, chlorination N, N-dimethyl-N-benzyl-3-(stearoyl amido) propylamine, dibenzyl two (stearamide ethyl) ammonium chloride etc.
Anionic surfactant can be at least one in metal carboxylate, Sulfonates, sulfuric ester salt and structure mixed surfactant, can be also its combination.That can enumerate has: aliphatic alcohol polyethenoxy ether carboxylate, odium stearate, sodium n-alkylbenzenesulfonate, sodium branched alkyl benzene sulfonate, diisopropyl sodium naphthalene sulfonate, nekal, alkyl sodium sulfonate, alpha-olefin sodium sulfonate, alpha-sulfo fatty acid ester, straight-chain alkyl sulfate, branched alkyl sodium sulphate, fatty alcohol polyoxyethylene ether sulfate etc.Preferably straight-chain alkyl sulfate, fatty alcohol polyoxyethylene ether sulfate.
Ink powder aggegation process of the present invention can also be used flocculating agent as required, comprise the various inorganic salts that can play flocculation, as sodium chloride, sodium sulphate, sodium nitrate, magnesium chloride, magnesium sulfate, magnesium nitrate, aluminium sulphate, aluminium polychloride, sodium hexametaphosphate, sodium phosphate, flocculating agent can be one or more combination wherein, the preferred 0.05%-1% of addition of described flocculating agent.
Inventor conducts in-depth research polyester-type color toner, it is mainly to carry out that discovery causes the reason of the problems referred to above adding before aggegation of charge adjusting agent, thereby while making aggegation, be the polyester complex emulsions A of the content of wax, containing the aggegation between polyester complex emulsions B and the charge adjusting agent three of colorant, thereby make within Partial charge correctives is covered by the agglutination particle of generation, cause agglutination particle surface part to have charge adjusting agent, part still exposes to have and has the functional group's of enriching polyester molecule structure, thereby it is strong fundamentally to solve ink powder moisture absorption, environmental suitability is poor, the problem that particularly carried charge sharply reduces in hot and humid environment.Inventor on this basis, the structure of the preparation technology to ink powder and ink powder itself is improved, first make the polyester complex emulsions A of the content of wax and obtain agglutination particle containing the polyester complex emulsions B aggegation of colorant, make again the complex emulsions C that contains charge adjusting agent in the further aggegation in the surface of aforementioned agglutination particle, form an ink powder with nucleocapsid structure, charge adjusting agent is all distributed on coated shell, to have the functional group's of enriching polyester molecule structure is completely enclosed within shell, and do not contact with the external world, thereby fundamentally solve the problems of the technologies described above.
Preferably add the opportunity that adds of the described complex emulsions C containing charge adjusting agent in the time that the particle diameter of nuclear particle increases to 3-5 μ m, is now coated the particle diameter that can be good at controlling ink powder, forms the ink powder with core-shell structure that shape and particle diameter meet the demands.
Ink powder preparation technology of the present invention is very simple, the polyester-type color toner carried charge of producing is good, good to environmental adaptation, particularly hot and humid environment is adapted to, has lower glass temperature and fixing temperature, there is good development density simultaneously, higher carried charge and narrow carried charge distribute, and bottom ash, useless powder rate in printing are low.
Embodiment
The preparation example A1 of the polyester complex emulsions of the content of wax
The preparation of the polyester complex emulsions of the content of wax: 30g wax (behenic acid 20 diester) and 70g vibrin (poly terephthalic acid dimethyl ester) are joined in 500ml beaker, add 300g solvent (ethyl acetate) and be heated to 65 ℃ of stirring and dissolving.Take 5g lauryl sodium sulfate (SDS) and be dissolved in 95g deionized water, be heated to 70 ℃, above-mentioned polyester liquid is joined in SDS aqueous solution, adopt IKA T50 high speed shear dispersing apparatus 3000rpm to carry out 30min dispersion.Above-mentioned dispersion liquid is proceeded in decompression part flow arrangement, be heated to 80 ℃ of distillation 2h to remove and to reclaim solvent, both can obtain the polyester complex emulsions of the content of wax, record its particle diameter as 178nm take nano particle size instrument, set it as emulsion (A-1).
The preparation example A2 of the polyester complex emulsions of the content of wax
In the polyester complex emulsions preparation example 1 of the content of wax, except vibrin (poly terephthalic acid dimethyl ester) is changed into bisphenol-A vinyl ester resin, the polyester complex emulsions of the identical content of wax obtaining of other conditions, this complex emulsions particle diameter is 169nm, sets it as emulsion (A-2).
The preparation example A3 of the polyester complex emulsions of the content of wax
In the polyester complex emulsions preparation example 1 of the content of wax, except vibrin (poly terephthalic acid dimethyl ester) is changed into copolymerization (ethoxylation bisphenol-A-fumarate), the polyester complex emulsions of the identical content of wax obtaining of other conditions, this complex emulsions particle diameter is 172nm, sets it as emulsion (A-3).
Contain the preparation example B1 of the polyester complex emulsions of colorant
Preparation containing the polyester complex emulsions of colorant: by 30g pigment blue 15: 3 and 70g vibrin (poly terephthalic acid dimethyl ester) join in 500ml beaker, add 300g solvent (ethyl acetate) and be heated to 65 ℃ of stirring and dissolving.Take 5g lauryl sodium sulfate (SDS) and be dissolved in 95g deionized water, be heated to 72 ℃, above-mentioned polyester liquid is joined in SDS aqueous solution, adopt IKA T50 high speed shear dispersing apparatus 3000rpm to carry out 30min dispersion.Above-mentioned dispersion liquid is proceeded in decompression part flow arrangement, be heated to 80 ℃ of distillation 2h to remove and to reclaim solvent, both can obtain the polyester complex emulsions containing colorant, record its particle diameter as 195nm take nano particle size instrument, set it as emulsion (B-1).
Contain the preparation example B2 of the polyester complex emulsions of colorant
Containing in the polyester complex emulsions preparation example 1 of colorant, except by pigment blue 15: 3 change into paratonere 150, the identical polyester complex emulsions that contains colorant obtaining of other conditions, this complex emulsions particle diameter is 187nm, sets it as emulsion (B-2).
Contain the preparation example B3 of the polyester complex emulsions of colorant
Containing in the polyester complex emulsions preparation example 1 of colorant, except by pigment blue 15: 3 change into pigment yellow 74, the identical polyester complex emulsions that contains colorant obtaining of other conditions, this complex emulsions particle diameter is 193nm, sets it as emulsion (B-3).
Contain the preparation example B4 of the polyester complex emulsions of colorant
Containing in the polyester complex emulsions preparation example 1 of colorant, except by pigment blue 15: 3 change into carbon black (Cabot company), the identical polyester complex emulsions containing colorant obtaining of other conditions, this complex emulsions particle diameter is 179nm, sets it as emulsion (B-4).
Contain the preparation example C1 of the complex emulsions of CCA
Preparation containing the polyester complex emulsions of CCA: by 20g CCA(salumin) and 80g vibrin (poly terephthalic acid dimethyl ester) join in 500ml beaker, add 300g solvent (ethyl acetate) and be heated to 65 ℃ of stirring and dissolving.Take 5g lauryl sodium sulfate (SDS) and be dissolved in 95g deionized water, be heated to 70 ℃, above-mentioned polyester liquid is joined in SDS aqueous solution, adopt IKA T50 high speed shear dispersing apparatus 3000rpm to carry out 30min dispersion.By above-mentioned dispersion liquid proceed to decompression part flow arrangement in, be heated to 80 ℃ distillation 2h to remove and to reclaim solvent, both can obtain the salumin containing CCA() polyester complex emulsions, record its particle diameter as 194nm take nano particle size instrument, set it as emulsion (C-1).
Contain the preparation example C2 of the complex emulsions of CCA
Containing in the polyester complex emulsions preparation example 1 of CCA, except 20g salumin is changed into 20g zinc salicylate, other conditions are identical obtain contain CCA(zinc salicylate) polyester complex emulsions, this complex emulsions particle diameter is 175nm, sets it as emulsion (C-2).
Do not contain the preparation example C3 of the complex emulsions of CCA
Containing in the polyester complex emulsions preparation example 1 of CCA, except vibrin (poly terephthalic acid dimethyl ester) is increased to 100g, do not add beyond CCA the identical polyester complex emulsions that obtains of other conditions, this complex emulsions particle diameter is 166nm, sets it as emulsion (C-3).
Ink powder preparation example 1
Emulsion (A-1) 100g, emulsion (B-1) 100g are joined in reactor, regulating stirring rate is that 500rpm stirs 10min, then to the aluminium polychloride that adds 80g1% in reactor, the pH of regulation system is 3, after stirring 30min, start to heat up, by 50min, the temperature of system is raised to 60 ℃, then the stirring rate of system is reduced to 250rpm, then start the variation of the particle diameter of detection system, in the time that the particle diameter of agglutination particle increases to 5 μ m, 50g emulsion (C-1) is put in reactor and is coated.Continue the variation of the particle diameter of detection system, in the time that the particle diameter of agglutination particle increases to 7.5 μ m, in reaction system, add ammoniacal liquor that the pH of system is adjusted to 7, then in system, add non-ionic surfactant X-405, then stirring rate is increased to 400rpm, be warmed up to 95 ℃ and carry out spheroidization, use FPIA-3000 to measure when the sphericity of particle arrives 0.96() cooling when above, ultimate size 6.5 μ m.Use centrifugal separator to filter, wash, heat drying under reduced pressure.Add additive to process and obtain ink powder to particle after dry.The ink powder obtaining is called ink powder (T1).
Ink powder preparation example 2
In carbon dust preparation example 1, except the polyester complex emulsions (A-1) of the content of wax being replaced by the polyester complex emulsions (A-2) of the content of wax, and the consumption of flocculant poly aluminum chloride is risen to beyond 100g to the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-2).
Ink powder preparation example 3
In carbon dust preparation example 1, except the polyester complex emulsions (A-1) of the content of wax being replaced by the polyester complex emulsions (A-3) of the content of wax, and the consumption of flocculant poly aluminum chloride is risen to beyond 120g to the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-3).
Ink powder preparation example 4
In carbon dust preparation example 1, except being replaced by the polyester complex emulsions (B-2) containing colorant containing colorant polyester complex emulsions (B-1), the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-4).
Ink powder preparation example 5
In carbon dust preparation example 1, except being replaced by the polyester complex emulsions (B-3) containing colorant containing colorant polyester complex emulsions (B-1), the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-5).
Ink powder preparation example 6
In carbon dust preparation example 1, except being replaced by the polyester complex emulsions (B-4) containing colorant containing colorant polyester complex emulsions (B-1), the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-6).
Ink powder preparation example 7
In carbon dust preparation example 1, except the polyester complex emulsions (C-1) containing CCA is replaced by the polyester complex emulsions (C-2) containing CCA, the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-7).
Ink powder preparation example 8
In carbon dust preparation example 2, except the polyester complex emulsions (C-1) containing CCA is replaced by the polyester complex emulsions (C-2) containing CCA, the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-8).
Ink powder preparation example 9
In carbon dust preparation example 3, except the polyester complex emulsions (C-1) containing CCA is replaced by the polyester complex emulsions (C-2) containing CCA, the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-9).
Contrast ink powder preparation example 10
In carbon dust preparation example 1, except being replaced by containing the polyester complex emulsions (C-1) of CCA not containing the polyester complex emulsions (C-3) of CCA, the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-10).
Contrast ink powder preparation example 11
In carbon dust preparation example 9, except being replaced by containing the polyester complex emulsions (C-2) of CCA not containing the polyester complex emulsions (C-3) of CCA, the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T-11).
Contrast ink powder preparation example 12
By emulsion (A-1) 100g, emulsion (B-1) 100g, 50g emulsion (C-1) joins in reactor, regulating stirring rate is that 500rpm stirs 10min, then to the aluminium polychloride that adds 80g1% in reactor, the pH of regulation system is 3, after stirring 30min, start to heat up, by 50min, the temperature of system is raised to 62 ℃, then the stirring rate of system is reduced to 250rpm, then start the variation of the particle diameter of detection system, continue the variation of the particle diameter of detection system, in the time that the particle diameter of agglutination particle increases to 7.8 μ m, in reaction system, add ammoniacal liquor that the pH of system is adjusted to 7.1, then in system, add non-ionic surfactant X-405, then stirring rate is increased to 400rpm, be warmed up to 95 ℃ and carry out spheroidization, use FPIA-3000 to measure when the sphericity of particle arrives 0.965() cooling when above, ultimate size 6.3 μ m, use centrifugal separator filters, wash, heating drying under reduced pressure.Add additive to process and obtain ink powder to particle after dry.The ink powder obtaining is called ink powder (T12).
Contrast ink powder preparation example 13
In carbon dust preparation example 12, except the polyester complex emulsions (C-1) containing CCA is replaced by the polyester complex emulsions (C-2) containing CCA, the identical carbon dust that obtains of other conditions.The carbon dust obtaining is called carbon dust (T13).
By the carbon dust hot and humid environment in the embodiment of the present invention (30 ℃/80%) examination with computer, its result is as follows:
Test shows, polyester ink powder of the present invention has lower glass temperature and fixing temperature, meet low-temperature fixing requirement, but contrast test shows, do not add polyester ink powder prepared by CCA method, under hot and humid environment, carried charge is lower, and printing effect is poor, consumption and useless powder rate are higher, and low grey phenomenon is serious.Compared with single stage method is added the polyester ink powder prepared of CCA and CCA is coated on to shell and possesses the polyester ink powder of nucleocapsid structure, its consumption, useless powder rate are all higher, and carried charge is poor, CCA is coated on to carried charge and the stability that toner particles top layer contributes to improve ink powder.
From the evaluation effect of test data and real machine, can find out that the polyester ink powder containing charge adjusting agent being prepared with the inventive method has lower glass temperature and fixing temperature, there is good development density simultaneously, higher carried charge and narrow carried charge distribute, bottom ash, useless powder rate in printing are very low, meet experiment needs of expected design, can effectively solve the difficult problems such as the easy moisture absorption of polyester ink powder.
Claims (8)
1. a polyester-type color toner, it is characterized in that, there is core-shell structure, take the polyester complex emulsions A of the content of wax and containing the agglutination particle obtaining after the polyester complex emulsions B aggegation of colorant as core, and make containing the complex emulsions C of charge adjusting agent further coated aggegation be shell on above-mentioned agglutination particle surface.
2. polyester-type color toner as claimed in claim 1, is characterized in that, described charge adjusting agent is zinc salicylate and/or salumin.
3. polyester-type color toner as claimed in claim 1 or 2, is characterized in that, in described complex emulsions C, the mass percent of charge adjusting agent is 3-30%.
4. the preparation method of polyester-type color toner as claimed in claim 1, is characterized in that,
Polyester granulate, Wax particles are joined to dispersed with stirring in hot solvent, then add the aqueous solution that contains surfactant, carry out high speed shear dispersion, the solution fully disperseing is carried out to desolvation processing, obtain the polyester complex emulsions A of the content of wax;
Polyester granulate, colorant are joined to dispersed with stirring in hot solvent, then add the aqueous solution that contains surfactant, carry out high speed shear dispersion, the solution fully disperseing is carried out to desolvation processing, obtain the polyester composite solution B containing colorant;
Resin particle, charge adjusting agent are joined to dispersed with stirring in hot solvent, then add the aqueous solution that contains surfactant, carry out high speed shear dispersion, the solution fully disperseing is carried out to desolvation processing, obtain the resin compounded solution C containing charge adjusting agent;
Complex emulsions A and complex emulsions B are obtained to nuclear particle by adding flocculating agent aggegation, the further coated complex emulsions C containing charge adjusting agent, aggegation obtains possessing the polyester-type color toner of nucleocapsid structure.
5. the preparation method of polyester-type color toner as claimed in claim 4, is characterized in that, described charge adjusting agent is zinc salicylate and/or salumin.
6. the preparation method of polyester-type color toner as claimed in claim 5, is characterized in that, in the polyester complex emulsions (A) of the content of wax, the mass percent of wax particle is 5-50%; In the described polyester complex emulsions (B) that contains colorant, the mass percent of colorant is 5-50%; The described mass percent containing charge adjusting agent in the emulsion of charge adjusting agent is 3-30%.
7. the preparation method of polyester-type color toner as claimed in claim 5, it is characterized in that, when described aggegation, add the polyester complex emulsions A of the content of wax to account for 10-60%, polyester complex emulsions B containing colorant accounts for 10-50%, complex emulsions C containing charge adjusting agent accounts for 5-20%, and it is 100% that three adds up to percentage by weight.
8. the preparation method of the polyester-type color toner as described in claim 5-7 any one, it is characterized in that, described complex emulsions (A) and complex emulsions (B) obtain nuclear particle by adding flocculating agent aggegation, in the time that the particle diameter of nuclear particle increases to 3-5 μ m, the further coated complex emulsions C containing charge adjusting agent, aggegation obtains possessing the polyester-type color toner of nucleocapsid structure.
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| CN105372953A (en) * | 2015-11-17 | 2016-03-02 | 湖北鼎龙化学股份有限公司 | Styrene-acrylic resin/polyester resin composite electrostatic image toner and preparation method thereof |
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