CN107153332A - A kind of ink powder preparation method of core shell structure - Google Patents
A kind of ink powder preparation method of core shell structure Download PDFInfo
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- CN107153332A CN107153332A CN201710514752.3A CN201710514752A CN107153332A CN 107153332 A CN107153332 A CN 107153332A CN 201710514752 A CN201710514752 A CN 201710514752A CN 107153332 A CN107153332 A CN 107153332A
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- ink powder
- shell structure
- core shell
- powder preparation
- toner particle
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/0802—Preparation methods
- G03G9/0804—Preparation methods whereby the components are brought together in a liquid dispersing medium
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- Developing Agents For Electrophotography (AREA)
Abstract
The present invention relates to a kind of ink powder preparation method of core shell structure, belong to the preparing technical field of laser printing/electrophotographic color toner toner.The method of the invention first prepares toner particle using physics fusion method, then uses chemical reaction method to prepare toner particle for ink powder that core, styrene-acrylic resin are shell；Methods described has merged the respective advantage of Physical and chemical method powder-making technique, and obtained ink powder has preferable mobility, and high-quality laser printing/xerography requirement is satisfied by terms of morphology and electric property.
Description
Technical field
The present invention relates to a kind of ink powder preparation method of core shell structure, belong to the system of laser printing/electrophotographic color toner toner
Standby technical field.
Background technology
Ink powder (Toner, also known as carbon dust, toner or electrostatic developer), is the powdered substance for electrophotographic image forming, it with
Carrier constitutes developer, participates in developing process, and be finally fixed on formation word or image on paper.Ink powder production preparation is related to
And be high-tech product generally acknowledged in the world to the content in the fields such as superfine powder processing, composite, chemical industry；And ink powder
It is that the main consumptive material in field is being duplicated and printed to electronic imaging imaging specific information chemicals industry.It is prepared by the ink powder of current main flow
Technology is physics fusion method, and it is to be placed in resin, colorant, additive etc. in kneading machine by a certain percentage, in resin melting temperature
(120~200 DEG C) kneading mixing on degree, gained fused mass is extruded, cools down, crush, and obtains primary powder, then sieve through powder
Divide and add additive and obtain finished product.The characteristics of this technology, can be briefly described as " Breaking-down " the processes of dry method.Should
Method has clear advantage：Technology maturation is reliable, easy to operate and safe；The quality of production is stable, and overall manufacturing cost is relatively low；Entirely certainly
Dynamic closing production line easily realizes environmental protection；The range of choice of raw material is wide.But there is also obvious shortcoming：Particle diameter distribution is wider, grain
Sub is in irregular shape, and apparent particle is coarse, easily causes poor fluidity, the problems such as surface nature is difficult to control to (these limitations
Problem will not be too prominent in black and white printing, but will produce greatly adverse effect for the quality of colour print), therefore, melt
The development requirement of high-quality can not be met by melting ink powder made from comminuting method.
Chemical method is the toner technology of preparing gradually risen in recent years, and it is with Raolical polymerizable synthetic resin at all
For the toner preparation process of starting point.At present mainly have suspension polymerization (such as USP65666028, USP6740463,
) and emulsion polymerization aggregation method (such as USP4983488, USP6531256, EP0162577, EP 0225476, EP USP6528222
0302939th, EP 0631196) dpd mode.Compared with traditional milling method, the production process energy consumption of chemical method is low, environmental protection
Property good (being crushed in preparation process using water as medium, without using high temperature and high-tenacity) and properties of product excellent (powder shape is advised
Whole spherical in shape or elliposoidal, narrow particle size distribution, composition are uniform) etc..However, at present chemical method powder-making technique also to there is technique relative
Complicated, condition control require strict, resinous type single (can only be radical polymerization mould assembly), production efficiency it is low need to improve with
Improve part.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of ink powder preparation side of core shell structure
Method, methods described has merged the respective advantage of Physical and chemical method powder-making technique, the ink powder prepared using this method have compared with
Good mobility, can meet high-quality laser printing/xerography requirement in terms of morphology and electric property.
The purpose of the present invention is achieved through the following technical solutions.
A kind of ink powder preparation method of core shell structure, methods described step includes：
Toner particle, dispersant, second alcohol and water first carry out ultrasonic disperse, obtain well mixed dispersion soln；It will divide again
Scattered solution is transferred in reaction vessel, and is stirred at 50 DEG C~90 DEG C；Styrene, acrylate and initiator are mixed
After uniform, it is added dropwise in above-mentioned reaction vessel, continues stirring reaction 3h~6h after dripping, separated again after cooling,
Wash, dry, obtain the ink powder of core shell structure.
Mass percent of the toner particle in dispersion soln is 1%~20%.
In the ink powder, toner particle is core, and styrene-acrylic resin is shell, i.e. toner particle surface one layer of phenylpropyl alcohol tree of cladding completely
Fat.
The superfines of enhancing mobility, the ink powder of the core shell structure can also be added in the ink powder of the core shell structure
It is well mixed with superfines, is met the color toner of high-quality laser printing/xerography requirement；The matter of superfines
The mass ratio of amount and toner particle is 0.1~2:100；The superfines is silica, metal oxide and stearate
One or more of；Wherein, grain sizes are nano level superfines.The preferred titanium dioxide of metal oxide,
Aluminum oxide, zinc oxide, strontium oxide strontia or magnesia, the preferred magnesium stearate of stearate, zinc stearate or calcium stearate.
The toner particle is prepared using physics fusion method, and color is Huang, product, blue or green or black.
The dispersant be peregal (AEO), agriculture breast 1600 (phenethyl phenol polyethenoxy ether),
One or more of sorbester p17 (sorbitan mono-oleic acid ester), neopelex, NaLS and enuatrol；Institute
It is preferably paregal O -20 (AEO O-20) to state peregal.
It is preferred that, it is stirred under 500rpm~2000rpm rotating speed.
The quality sum ratio of the quality of toner particle and styrene and acrylate is 100:(1~10).
The styrene:Acrylate:The mass ratio of initiator is (70~90):(8~20):(0.1~1), preferably 85:
15:0.6。
The carbon number of alkyl is 1~6 in the acrylate.
The initiator is the radical initiators such as azodiisobutyronitrile, ammonium persulfate, potassium peroxydisulfate or sodium peroxydisulfate.
Beneficial effect：
A kind of ink powder preparation method for core shell structure that the present invention is provided, has merged Physical and chemical method powder-making technique
Respective advantage, can ultimately form subsphaeroidal color toner particle, with preferable mobility, in the side such as morphology and electric property
Face is satisfied by high-quality laser printing/xerography requirement.
Brief description of the drawings
Fig. 1 is SEM (SEM) figure of powdered black ink prepared by embodiment 1.
Embodiment
With reference to specific embodiment, the present invention is further elaborated, but the present invention is not limited to following examples.Institute
It is conventional method unless otherwise instructed to state method, and the raw material can be obtained from open commercial sources unless otherwise instructed.
Embodiment 1
Physics fusion method prepares toner particle：Styrene-acrylic resin, paraffin, zinc salicylate, carbon black (Cabot 660R) are according to 78:
8:4:10 mass ratio is well mixed in high-speed mixer, then carries out high-temperature fusion mixing, afterwards extruded machine extrusion tabletting,
And ball mill coarse crushing is inputted, 5 μm~10 μm of black toner particle is obtained further across airslide disintegrating mill crushing and classification；
The preparation of toner dispersion liquid：25g black toners particle and 2g NaLSs are added in 500mL flasks, then
200mL water and 100mL ethanol are added, ultrasonic disperse 30min in ultrasonic machine is subsequently placed in, uniform black toner is formed and disperses molten
Liquid；The flask for filling black toner dispersion soln is heated to 70 DEG C, and stirred under 1800rpm rotating speed；
The preparation of the ink powder of core shell structure：Will be by 0.01g potassium peroxydisulfates, 1.3g styrene and 0.23g butyl acrylate groups
Into mixed solution be added dropwise in above-mentioned flask, continue the stirring reaction 4h at 70 DEG C after dripping off, be cooled to room temperature, will react
Product is repeatedly washed and centrifuged with deionized water, is dried；Dried powder is mixed with 0.08g nano-titanium dioxide powders
It is even, obtain with core shell structure and be adapted to the powdered black ink of laser printing/xerography.
It can see from the SEM figures of prepared powdered black ink, one layer coated completely as the toner particle surface of core
Styrene-acrylic resin, i.e. prepared powdered black ink have core shell structure, refer to Fig. 1.
Embodiment 2
Physics fusion method prepares toner particle：Styrene-acrylic resin, paraffin, zinc salicylate, yellow uitramarine (pigment yellow 180) according to
80:9:3:8 mass ratio is well mixed in high-speed mixer, then carries out high-temperature fusion mixing, afterwards extruded machine extrusion pressure
Piece, and ball mill coarse crushing is inputted, 5 μm~10 μm of yellow toner particle is obtained further across airslide disintegrating mill crushing and classification
Son；
The preparation of toner dispersion liquid：30g yellow toner particles and 3g neopelexes are added into 500mL flasks
In, 200mL water and 100mL ethanol are added, ultrasonic disperse 30min in ultrasonic machine is subsequently placed in, uniform yellow toner is formed
Dispersion soln；The flask for filling yellow toner dispersion soln is heated to 80 DEG C, and stirred under 1500rpm rotating speed；
The preparation of the ink powder of core shell structure：Will be by 0.018g ammonium persulfates, 2.55g styrene and 0.45g ethyl acrylates
The mixed solution of composition is added dropwise in above-mentioned flask, continues the stirring reaction 5h at 80 DEG C after dripping off, and is cooled to room temperature, will be anti-
Answer product repeatedly to be washed and centrifuged with deionized water, dry；Dried powder is mixed with 0.15g nano silica powders
Uniformly, obtain with core shell structure and be adapted to the Yellow ink powder of laser printing/xerography.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (8)
1. a kind of ink powder preparation method of core shell structure, it is characterised in that：Methods described step includes,：
Toner particle, dispersant, second alcohol and water first carry out ultrasonic disperse, obtain well mixed dispersion soln；Again will be scattered molten
Liquid is transferred in reaction vessel, and is stirred at 50 DEG C~90 DEG C；Styrene, acrylate and initiator are well mixed
Afterwards, it is added dropwise in above-mentioned reaction vessel, continues stirring reaction 3h~6h after dripping, separated, washed again after cooling,
Dry, obtain the ink powder of core shell structure；
The toner particle is prepared using physics fusion method, and color is Huang, product, blue or green or black；
The dispersant is peregal, agriculture breast 1600, sorbester p17, neopelex, NaLS and enuatrol
One or more of；
The quality sum ratio of the quality of toner particle and styrene and acrylate is 100:(1~10)；
The styrene:Acrylate:The mass ratio of initiator is (70~90):(8~20):(0.1~1)；
The initiator is radical initiator.
2. a kind of ink powder preparation method of core shell structure according to claim 1, it is characterised in that：To the core shell structure
Ink powder in addition enhancing mobility superfines, and be well mixed, being met high-quality laser printing/xerography will
The color toner asked；
Wherein, the mass ratio of the quality of superfines and toner particle is 0.1~2:100；The superfines be silica,
One or more of metal oxide and stearate.
3. a kind of ink powder preparation method of core shell structure according to claim 2, it is characterised in that：The metal oxide
For titanium dioxide, aluminum oxide, zinc oxide, strontium oxide strontia or magnesia.
4. a kind of ink powder preparation method of core shell structure according to claim 2, it is characterised in that：The stearate is
Magnesium stearate, zinc stearate or calcium stearate.
5. a kind of ink powder preparation method of core shell structure according to any one of Claims 1-4, it is characterised in that：It is described
Mass percent of the toner particle in dispersion soln is 1%~20%.
6. a kind of ink powder preparation method of core shell structure according to any one of Claims 1-4, it is characterised in that：It is described
The carbon number of alkyl is 1~6 in acrylate.
7. a kind of ink powder preparation method of core shell structure according to any one of Claims 1-4, it is characterised in that：It is described
Initiator is azodiisobutyronitrile, ammonium persulfate, potassium peroxydisulfate or sodium peroxydisulfate.
8. a kind of ink powder preparation method of core shell structure according to any one of Claims 1-4, it is characterised in that：It is described
The stir speed (S.S.) of stirring is 500rpm~2000rpm.
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| CN201710514752.3A CN107153332B (en) | 2017-06-29 | 2017-06-29 | Preparation method of core-shell-structured toner |
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