WO2008123569A1 - 微粒子分散液 - Google Patents
微粒子分散液 Download PDFInfo
- Publication number
- WO2008123569A1 WO2008123569A1 PCT/JP2008/056635 JP2008056635W WO2008123569A1 WO 2008123569 A1 WO2008123569 A1 WO 2008123569A1 JP 2008056635 W JP2008056635 W JP 2008056635W WO 2008123569 A1 WO2008123569 A1 WO 2008123569A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dispersion
- group
- weight
- fine particles
- spacer
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
Definitions
- the present invention relates to a fine particle dispersion for spraying fine particles by an inkjet method.
- a spacer is randomly distributed on a substrate on which pixel electrodes are formed. Therefore, a spacer is also present in the display portion, and a part of the spacer leaks light. There was a problem of waking up. Therefore, a method in which spacers are fixedly arranged only on the non-display portion of the substrate by the inkjet method is being studied.
- the spacer even if the spacer is placed in the non-display area, if the spacer's adhesive strength to the substrate is small, it may move when liquid crystal is injected and may enter the display area. Is done.
- Japanese Patent No. 3997038 and Japanese Patent Laid-Open No. 9-105946 disclose a method for improving the adhesion of the spacer to the substrate by blending an adhesive resin in the spacer dispersion.
- JP 2000-347191 discloses adhesive particles having a softening point of 50 ° C to 160 ° C in a spacer dispersion
- JP 2007-33797 discloses a dispersion in a spacer dispersion.
- a method of improving the adhesion of the spacer to the substrate by blending adhesive particles having a softening point of 40 ° C to 120 ° C is disclosed.
- the number of sprayed spacers may decrease over time due to clogging of the filter and nozzle, or the inside of the ink jet device. Due to the retention at, the dispersion of the number of sprays between the heads increases and streaks occur.
- the specific gravity difference between the spacer and the ink solvent is set to 0.05 or less.
- the specific gravity ratio between the spacer and the solvent is set to 1.00 or more and 1.70 or less. Disclosure of the invention
- the adhesive resin may not be collected when the droplets are dried. Concerns about contamination.
- the inkjet printing stability is ensured by reducing the specific gravity difference between the spacer and the ink solvent.
- the specific gravity difference between the spacer and the ink solvent it is conceivable to lower the specific gravity of the spacer and increase the liquid specific gravity of the dispersion medium.
- the specific gravity of the spacer is lowered, the strength may be reduced.
- the liquid specific gravity is increased, the viscosity will increase, so the ink will be threaded during ejection and the main point will be the landing point.
- small droplets scatter around them, so-called satellites occur, or the boiling point of the dispersion rises, resulting in poor drying.
- An object of the present invention is to improve the adhesion of a spacer to a substrate in a fine particle dispersion for spraying fine particles by an ink jet method without contaminating an alignment film.
- the present invention relates to a fine particle dispersion for spraying fine particles by an inkjet method, comprising a dispersion medium, fine particles, and a compound having a hydrazino group or a hydrazone group. .
- the present inventor has found that by using a compound having a hydrazino group or a hydrazone group as an adhesive component, a strong fixing force can be obtained without contaminating the alignment film, and the present invention has been achieved.
- the surface of the fine particle has one or more functional groups selected from the group consisting of an alkyl group, a hydroxyl group, an epoxy group, and a carboxyl group.
- this functional group is at least one of an epoxy group and a hydroxyl group.
- the compound has a plurality of hydrazino groups, and the amount of the compound with respect to 100 parts by weight of the fine particles is 6 parts by weight or more.
- the dispersibility of the fine particles can be further increased, and the dispersion stability over time can be obtained.
- the ink is dispersed by the ink jet method, the number unevenness in the droplets can be reduced and stable dispersion can be achieved.
- Figure 1 shows the alignment film after printing the spacer ink in Example 1. It is a photograph which shows the surface state of.
- FIG. 2 is a photograph showing the surface state of the alignment film after printing the spacer ink in Comparative Example 1.
- the use of the fine particle dispersion of the present invention is particularly suitable for a technique in which a spacer is arranged at a fixed point on a substrate, but is not limited thereto.
- the fine particle dispersion of the present invention can be encapsulated in an electronic paper cell by an ink jet method.
- the present invention is also suitable for such applications.
- Examples of the dispersion medium contained in the dispersion of the present invention include the following.
- multimers of ethylene glycolate such as diethylene glycol, triethylene glycol, and tetraethylene glycol; these monomethylol etherol, monoethylinol etherol, monoisopropyl etherol, monopropyl ether, monobutyl ether and other lower monoalkyl ethers
- Propylene glycol such as propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, etc.
- lower monoalkyl ethers such as these monomethyl ethers, monoethyl etherate, monoisopropinoreateore, monopropinoreate / le, monobchinolee tere; dimethyl ether, jetyl ether, diisopropyl ether, Lower alkyl ethers such as dipropyl ether; alkyl esters such as monoacetate and diacetate;
- the particle diameter of the fine particles used in the present invention is preferably 0.5 / m to 8 ⁇ m, and 2 / in! More preferably, it is ⁇ 7 ⁇ m.
- the fine particles used in the present invention are not particularly limited.
- the surface of the fine particle has one or more functional groups selected from the group consisting of an alkyl group, a hydroxyl group, an epoxy group, and a carboxyl group.
- the functional group is at least one of an epoxy group and a hydroxyl group.
- the material of the fine particles is not particularly limited, and examples thereof include resins, organic substances, inorganic substances, and compounds and mixtures thereof.
- the resin is not particularly limited.
- Linear or cross-linked polymer such as polyamine, polyimide, polyimide, polysulfone, polyphenylene oxide, polyacetal; epoxy resin, fuunol resin, melamine resin, benzoguanamine resin, unsaturated polyester resin, divinyl
- a resin having a crosslinked structure such as a benzene polymer, a dibutylbenzene monostyrene copolymer, a divinylbenzene monoacrylic acid ester copolymer, a diaryl phthalate polymer, and a triallyl isocyanurate polymer.
- silica etc. are mention
- the production method of the fine particles is not particularly limited, and polymerization methods such as emulsion polymerization, dispersion polymerization, suspension polymerization, and side polymerization, particle precipitation granulation method from a solution in which a polymer material is dissolved in a solvent, or a polymer It can be obtained from a known method such as a method of pulverizing the material into particles.
- a fine particle coating resin can also be provided.
- coating resin The type of is not particularly limited.
- One or more functional groups selected from the group consisting of an alkyl group, a hydroxyl group, an epoxy group, and a carboxyl group can be attached to the coating resin.
- polybutyl alcohol is a poly-2-hydroxy compound such as polyglycidyl methacrylate and polyglycidyl methacrylate.
- R i 'R is a thermoplastic resin such as a polymer or copolymer of a monomer having a hydroxyl group or an epoxy group, an epoxy resin, a phenol resin, Examples thereof include thermosetting resins such as melamine resins, and mixtures thereof, but are not particularly limited as long as they have the functional groups as described above. Further, these coating resins are preferably not chemically bonded but chemically bonded.
- the surface of the particles and the polymer constituting the adhesion layer are bonded by a covalent bond.
- the method include a graft polymerization method and a polymer reaction method.
- a graft polymerization method a polymerizable vinyl group is introduced onto the particle surface, and the monomer is polymerized using the vinyl group as a starting point.
- a polymerization initiator is introduced onto the particle surface, and the initiator There are two possible methods for polymerizing the above monomers.
- Fine particles can also be used. Examples of such commercially available fine particles include “Nato Cospasaichi” (manufactured by NATCO Corporation), “Micropearl” (manufactured by Sekisui Chemical Co., Ltd.), “Peposter”, “Soliostar”, “Seahoster KE” (Nippon Catalyst) Chemical Industry), Chemisnow (Soken Chemical Co., Ltd.), Tospar (GE Toshiba Silicone Co.), Hayabies (Hayakawa Rubber Co., Ltd.), etc. is not.
- This compound is not particularly limited as long as it has a hydrazino group or a hydrazone group.
- a hydrazino group is a (NH 2 NH—) group.
- a hydrazide group is an (NH 2 NHC (O)-) group, but contains an (NH 2 NH-) group. Therefore, in the present invention, a compound having a hydrazide group is included in a compound having a hydrazino group.
- carbohydrazide two hydrazino groups are connected by one carbocyclic group. Therefore, it has a plurality of hydrazino groups. Moreover, it has a hydrazino group and a hydrazide group.
- a hydrazino group is bonded to a thiocarbonyl group to form an NH 2 NHC (S) — group.
- This is a thiocarbohydrazide group.
- the thiocarbohydrazide group contains a (NH 2 NH_) group. Therefore, in the present invention, a compound having a thiocarbohydrazide group is included in a compound having a hydrazino group.
- the compound may have any one of a hydrazino group and a hydrazone group. Examples are given below.
- This compound is not particularly limited as long as it has a plurality of hydrazino groups, and the number of hydrazino groups may be 2 or 3 or more.
- Hidden A radino group is an (NH 2 NH—) group.
- At least one hydrazino group is bonded to a thiocarbonyl group to form an NH 2 NHC (S) — group.
- thiocarbohydrazide has two hydrazino groups linked by a single thiocarbonyl group.
- Examples of such compounds include the following.
- Carbohydrazide, thiocarbohydrazide, bifunctional or higher carboxylic acid hydrazide eg, oxalic acid dihydrazide, malonic acid dihydrazide, succinic acid dihydrazide, dartaric acid dihydrazide, adipic acid dihydrazide, sebacic acid dihydrazide
- Acid dihydrazide maleic acid dihydrazide, fumaric acid dihydrazide, itaconic acid dihydrazide, isophthalic acid dihydrazide, naphthalenic acid dihydrazide, 1,3-bis (hydrazinocarbonoethyl) 15-isopropyldantoin 7, 1 1-Octadecadiene 1, 1 8-Dicarbohydrazide, 1, 3, 5-Tris (2-hydrazinocarbonylethyl) 1 1, 3, 5-Triazine 2, 4, 6 (1 H, 3 H, 5 H) 1 trione, 1, 2,
- the amount of the compound relative to 100 parts by weight of the fine particles is not particularly limited. From the viewpoint of improving the adhesion of fine particles, the amount of the compound is preferably 0.1 part by weight or more, and more preferably 0.1 part by weight or more. Further, this upper limit is not particularly limited as long as the compound is dissolved in the dispersion medium, but it can be, for example, 100 parts by weight or less. From the viewpoint of preventing contamination of the alignment film, it is more preferably 100 parts by weight or less.
- the amount of the compound with respect to 100 parts by weight of the fine particles is preferably 6 parts by weight or more, and more preferably 7 parts by weight or more from the viewpoint of improving the dispersibility and dispersion stability of the fine particles. preferable.
- the specific gravity difference between the dispersion medium and the fine particles is not particularly limited, but is preferably 0.12 or less. When the specific gravity difference exceeds 0.12, the sedimentation speed of the fine particles is too high, and the number of nozzles tends to be uneven during printing, which tends to cause unevenness.
- the droplet drying temperature is preferably 120 ° C or lower. If a temperature exceeding 120 ° C is applied in the form of droplets, the alignment film may be contaminated. Especially preferred Is below 90 ° C.
- the fixing temperature is preferably 170 ° C to 250 ° C. If the temperature is lower than 170 ° C, sufficient fixing force may not be obtained. If a temperature exceeding 250 ° C is applied, the substrate material such as the alignment film may be adversely affected. Particularly preferably, it is 180 ° C to 220 ° C.
- Adipic acid dihydrazide "ADH"
- Isophthalic acid dihydrazide "IDH"
- Each fine particle was produced as follows.
- trimethylol prop 20 g of nitridylidyl ether was subjected to a seed polymerization, and after drying, a thermal crosslinking reaction was performed at 200 ° C. In this way, fine particles A having a hydroxyl group and an epoxy group on the particle surface were obtained.
- Fine particles A were dispersed in 30 g of methyl ethyl ketone, charged with 3 g of methacryloyl isocyanate, reacted at room temperature for 30 minutes, and washed to obtain fine particles B having a polymerizable vinyl group on the surface of fine particles A.
- Methyl ethyl ketone 20 g, glycidyl metatalylate 10 g, and benzoyl peroxide 0.1 g were charged into the reactor to the fine particle B lg, and the temperature was raised to 80 ° C. under a nitrogen stream. React for minutes. Thereafter, by washing with methyl ethyl ketone, fine particles c (fine particles having epoxy groups on the surface) having a graft polymer layer of daricidyl methacrylate on the surface were obtained.
- fine particle B having a polymerizable bur group on the surface, 20 g of isopropylanolol, 2 —hydroxylchetyl methacrylate 5 g, 2 —hydroxypropylene methacrylate 5 g, benzoylper Charge 0 ⁇ 1 g of Oxide to the reactor, raise the temperature to 80 ° C under a nitrogen stream, and react for 60 minutes. After washing with methanol, fine particles D (fine particles having a hydroxyl group on the surface) having a graft copolymer layer of 2-hydroxyxetyl methacrylate and 2-hydroxypropyl methacrylate on the surface Got.
- Fine particles E fine particles having a hydroxyl group and a carboxyl group on the surface having a graft copolymer layer with methacrylate were obtained.
- the mixture was filtered through a stainless steel mesh having an opening of 50 ⁇ to obtain Dispersion 1. Ultrasonic waves were used for dispersion.
- Dispersion 9 was obtained by the same operation as dispersion 1, so that the ratio of mixed solvent / particle / ADH was 100/1 / 0.1 (weight ratio).
- Example 13 Weight of VDH with respect to fine particles A 10 parts by weight: specific gravity difference 0.07)
- a dispersion 14 was obtained by filtration through a stainless mesh. Ultrasonic waves were used for dispersion.
- Dispersion 20 was obtained by the same operation as dispersion 13 so that the ratio of mixed solvent / particle / VDH was 100 / l / 0 (weight ratio).
- Dispersion 27 was obtained by the same operation as dispersion 1, so that the ratio was mixed solvent / particle / VDH-100 / 1 / 0.1 (weight ratio).
- ITO (rubber coated with PI (SE-7492 manufactured by Nissan Chemical Co., Ltd.)) was rubbed with an ink jet device equipped with a 30 / X m nozzle at the tip of a piezo head. It was printed on attached soda glass (manufactured by Opto Science Co., Ltd.), heated in a 90 ° C clean oven for 10 minutes to dry the droplets, and further heated at 200 ° C for 30 minutes to be fixed.
- soda glass manufactured by Opto Science Co., Ltd.
- a panel was fabricated by injecting liquid crystal (MLC-6222, manufactured by Merck Jack Pan Co., Ltd.) into a cell using a substrate to which a spacer was fixed.
- An AC voltage (AC) of 3 Vrms is applied to this liquid crystal panel to confirm the alignment film state.
- Adhesive component exists in approximately the same size as the droplet size before drying, orientation If the membrane is contaminated.
- the adjusted ink was dropped on a slide glass, and the dispersibility was confirmed with an optical microscope.
- the prepared ink was added to a screw tube with a capacity of 20 ml up to a height of 35 mm, and left in a clean room (room temperature 20 ° C, humidity 50%) for 2 weeks. After that, redispersion was applied, and the state of the ink was confirmed when left still for one day.
- Example 1 Example 2
- Example 3 Dispersion Dispersion 1 Dispersion 2 Dispersion 3 To Dispersion 4 -A
- a C D Example 4
- Example 10 Example 11 Example 12 Example 13 Example 14 Dispersion Dispersion 10 Dispersion 11 Dispersion 12 Dispersion 13 To Dispersion 14 -SA- A A A A A A A
- Dispersion Dispersion 26 Dispersion Dispersion 28 Dispersion 29
- Example 23 Example 24 Example 25
- Example 26 Dispersion Dispersion 30 Dispersion 31 Dispersion 32 To Dispersion 33. A A A A A A
- FIG. 2 is Comparative Example 1: Oxazoline-containing aqueous polymer
- contamination of the alignment film of almost the same size was confirmed in the area where the droplets existed.
- the surface has at least one functional group of an alkyl group (including a long chain alkyl group), a hydroxyl group, an epoxy group, or a carboxyl group. Spacers have improved dispersibility and do not lose dispersibility after long-term storage. It was confirmed.
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009509290A JPWO2008123569A1 (ja) | 2007-03-30 | 2008-03-27 | 微粒子分散液 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-092603 | 2007-03-30 | ||
JP2007092603 | 2007-03-30 |
Publications (1)
Publication Number | Publication Date |
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WO2008123569A1 true WO2008123569A1 (ja) | 2008-10-16 |
Family
ID=39831038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/056635 WO2008123569A1 (ja) | 2007-03-30 | 2008-03-27 | 微粒子分散液 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPWO2008123569A1 (ja) |
KR (1) | KR20100014085A (ja) |
CN (1) | CN101542370A (ja) |
TW (1) | TW200844612A (ja) |
WO (1) | WO2008123569A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5087187B2 (ja) * | 2011-03-09 | 2012-11-28 | 積水化学工業株式会社 | 液晶表示素子用スペーサ、液晶表示素子用スペーサ分散液及び液晶表示素子 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001240782A (ja) * | 2000-02-29 | 2001-09-04 | Asahi Optical Co Ltd | サーマルタイプのインクジェットプリンター及びインク転写プリンター用油性インク |
-
2008
- 2008-03-27 TW TW097110995A patent/TW200844612A/zh unknown
- 2008-03-27 WO PCT/JP2008/056635 patent/WO2008123569A1/ja active Application Filing
- 2008-03-27 JP JP2009509290A patent/JPWO2008123569A1/ja not_active Withdrawn
- 2008-03-27 KR KR1020087032033A patent/KR20100014085A/ko not_active Application Discontinuation
- 2008-03-27 CN CNA2008800005027A patent/CN101542370A/zh active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001240782A (ja) * | 2000-02-29 | 2001-09-04 | Asahi Optical Co Ltd | サーマルタイプのインクジェットプリンター及びインク転写プリンター用油性インク |
Also Published As
Publication number | Publication date |
---|---|
CN101542370A (zh) | 2009-09-23 |
TW200844612A (en) | 2008-11-16 |
JPWO2008123569A1 (ja) | 2010-07-15 |
KR20100014085A (ko) | 2010-02-10 |
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