WO2006035749A1 - 球状樹脂微粒子、球状樹脂微粒子の製造方法、及び液晶表示素子用スペーサ - Google Patents
球状樹脂微粒子、球状樹脂微粒子の製造方法、及び液晶表示素子用スペーサ Download PDFInfo
- Publication number
- WO2006035749A1 WO2006035749A1 PCT/JP2005/017704 JP2005017704W WO2006035749A1 WO 2006035749 A1 WO2006035749 A1 WO 2006035749A1 JP 2005017704 W JP2005017704 W JP 2005017704W WO 2006035749 A1 WO2006035749 A1 WO 2006035749A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spherical resin
- fine particles
- weight
- particles
- resin fine
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/04—Acids, Metal salts or ammonium salts thereof
- C08F20/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- 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
-
- 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
- G02F1/13392—Gaskets; Spacers; Sealing of cells spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
Definitions
- the present invention relates to spherical resin particles, a method for producing spherical resin particles, and a spacer for a liquid crystal display element. Specifically, spherical resin particles having a smooth surface by a seed polymerization method, and the spherical particles The present invention relates to a method for producing fat fine particles and a spacer for a liquid crystal display element using the spherical resin fine particles. Background art
- Spherical resin particles used for spacers for liquid crystal display elements are required to have a uniform particle diameter.
- Conventionally, as a method for obtaining fine particles having a uniform particle diameter there have been many cases where fine particles obtained mainly by suspension polymerization are classified to make the fine particles uniform.
- the yield of the obtained fine particles is low, and the uniformity of the particle diameter is not satisfactory.
- a vinyl monomer is absorbed into monodispersed fine particles such as a styrene polymer and then polymerization is performed to increase the particle size.
- a seed polymerization method is known. In this method, generally, spherical resin particles having a uniform particle size of 1 to 10; ⁇ ⁇ can be obtained which are used as spacers for liquid crystal display elements.
- Patent Document 1 discloses a two-stage swelling seed polymerization method. According to the method of Patent Document 1, a polymer having a uniform particle size can be obtained, but after absorbing a hydrophobic organic compound called a swelling aid in the seed particles in advance and increasing the swelling ability of the seed particles. It is necessary to perform polymerization by absorbing vinyl monomers. Such a method has a problem that the work becomes complicated because two absorption steps of a swelling assistant and a monomer are necessary. Another problem is that swelling aids not involved in polymerization also elute fine particles after polymerization.
- Patent Document 2 discloses a method for producing highly monodispersed fine particles by seed polymerization using seed particles having a weight average molecular weight of 1000 to 20000.
- spherical resin particles used in spacers for liquid crystal display elements are required to have a uniform particle diameter and no movement of the spacers after being dispersed on a liquid crystal panel. It has been.
- Patent Document 1 Japanese Patent Publication No.57-24369
- Patent Document 2 JP-A-8-176214
- the movement of the spacer after being sprayed on the liquid crystal panel is more likely to occur in the spherical resin particles obtained by the seed polymerization method than in the spherical resin particles obtained by the suspension polymerization method.
- the cause is considered to be the smoothness of the surface of the spherical sallow fine particles.
- the spherical resin particles obtained by the seed polymerization method are polymerized after the vinyl monomer is absorbed and swollen by the seed particles, when the force is not uniform, The surface after the polymerization becomes a scale-like protrusion, and the smoothness of the surface is lost.
- the smoothness of the surface is low when the degree of polymerization is low, and high when the seed particles are used.
- seed particles having a weight average molecular weight of 1000 to 20000 as in Patent Document 2 described above are used, sufficient surface smoothness is not obtained because the molecular weight distribution of the seed particles is wide.
- the present invention provides a spherical resin fine particle having a smooth surface even by the seed polymerization method, a method for producing the spherical resin fine particle, and a surface using the spherical resin fine particle.
- An object of the present invention is to provide a spacer for a liquid crystal display element that is smooth and hardly moves after being spread on a liquid crystal panel.
- the invention according to claim 1 is a spherical resin fine particle obtained by seed polymerization, wherein the surface is observed with a FE-SEM type electron microscope,
- the projections appearing on the surface are defined on the orthographic projection surface of the spherical resin particles, the number of the divided regions appearing in the concentric circle whose diameter is 1Z2 of the spherical resin particle diameter is 10 or more.
- the invention according to claim 2 provides the spherical resin fine particles according to claim 1, having a number average particle diameter of 1 to 10 ⁇ m.
- the invention according to claim 3 is a crosslinked resin comprising 90% by weight or more of a polymer composed of a polymerizable unsaturated monomer containing 50% by weight of polyfunctional (meth) acrylate.
- the claim is
- the invention according to claim 4 (Invention 2) is characterized in that after the polymerizable unsaturated monomer and the polymerization initiator are dispersed in water, the weight average molecular weight is 2000 to 15000 and the weight average molecular weight Z
- the spherical resin particles according to claim 1 or 2 wherein the seed particles having a number average molecular weight of 1.6 or less are absorbed at a swelling degree of 10 to: LOO times, and polymerized unsaturated monomers are polymerized to obtain polymer particles.
- a manufacturing method is provided.
- the polymerizable unsaturated monomer is a polyfunctional (meth) acrylate.
- the invention according to claim 6 is the spherical resin particles according to any one of claims 1 to 3, or the spherical resin according to claim 4 or 5.
- FIG. 1 is a FE-SEM electron micrograph of the spherical resin particles obtained in Example 1.
- FIG. 2 is a FE-SEM type electron micrograph of the spherical resin particles obtained in Example 2.
- FIG. 3 is a FE-SEM type electron micrograph of the spherical resin particles obtained in Comparative Example 2.
- FIG. 4 is a schematic front view showing a state in which protrusions appearing on the surface of the spherical snab fine particles observed in the present invention are observed with an FE-SEM electron micrograph.
- the spherical resin particles of the present invention 1 are obtained by seed polymerization.
- a polymerizable unsaturated monomer and a polymerization initiator are dispersed in water and then absorbed by seed particles, and the polymerizable unsaturated monomer is polymerized to obtain polymer fine particles. Is. For this reason, the obtained spherical sallow fine particles have a uniform particle size with a very narrow particle size distribution.
- the surface of the spherical resin particles is observed with a FE-SEM type electron microscope. The observation may be performed with an electron micrograph.
- the protrusions are sectioned, and the number of partitioned areas is counted. That is, as schematically shown in FIG. 4, a plurality of protrusions 11 appearing in the concentric circle 12 on the orthographic projection surface of the spherical resin particles 10 are defined as one region 13.
- the division of the protrusion 11 means that one area 13 surrounding the protrusion 11 is determined in order to distinguish the protrusion 11 from a portion outside the protrusion.
- the number of the regions 13 is the number appearing in the concentric circle 12 whose diameter is 1Z2 of the diameter of the spherical resin particles on the orthographic projection surface of the spherical resin particles. Therefore, the number of partitioned areas appearing in the concentric circle 12 is important. Specifically, it is necessary that the number of the regions 13 that appear in the concentric circles 12 having a diameter of 1 Z2 that is the diameter of the spherical resin fine particles and that respectively define the protrusions is 10 or less.
- the FE-SEM type electron microscope is a field emission scanning electron microscope, and the electron beam can be narrowed down, so that high-resolution observation is possible compared to a general-purpose SEM.
- the power that can be selected is as high as 1 ⁇ m or more and less than 4 ⁇ m is 20000 times and 4 ⁇ m or more. Less than 7 ⁇ m is 15000 times, 7 ⁇ m or more but less than 10 ⁇ m ⁇ or 10000 times, 10 ⁇ m or more but less than 15 ⁇ m ⁇ or 5000 times Use it.
- the spherical resin particles of the present invention 1 can be freely designed depending on the particle diameter of the seed particles used and the mixing ratio of the polymerizable unsaturated monomer and the seed particles.
- the number average particle diameter is 1 to: ⁇ / ⁇ ⁇ , CV value (value obtained by dividing the standard deviation in the particle size distribution by the number average particle diameter as a percentage).
- a number average particle diameter of 3.5 to: LO m is more preferable, with a uniform particle diameter of 10% or less being preferred.
- the spherical resin particles of the present invention 1 have a number average particle diameter force of ⁇ 10 / zm.
- the number average particle diameter is more preferably 3.5 to: LO m.
- a polymerizable unsaturated monomer and a polymerization initiator are dispersed in water and then absorbed in seed particles to polymerize the polymerizable unsaturated monomer.
- the so-called seed polymerization method can be used, but in order to make the surface of the spherical fine particles fine, the seed particles have a weight average molecular weight of 2000 to 15000 and a weight average molecular weight Z number average molecular weight of 1 6 or less, and a method in which the seed particles are absorbed at a swelling degree of 10 to: LOO times is preferable.
- the weight average molecular weight is 2000 to 15000 and the weight Weight average molecular weight Z number average molecular weight Swelling degree of seed particles of 1.6 or less: 10 to: Absorbed at LOO times and polymerized polymerizable unsaturated monomer to produce fine polymer particles Is also one aspect of the present invention.
- the spherical resin fine particle of the present invention 1 is a crosslinked resin containing 90% by weight or more of a polymer composed of a polymerizable unsaturated monomer containing 50% by weight of polyfunctional (meth) acrylate. It is preferable that Here, the polyfunctional (meth) acrylate refers to a polyfunctional metatalylate or a polyfunctional acrylate.
- the spherical resin particles are cross-linked resin containing 90% by weight or more of a polymer comprising a polymerizable unsaturated monomer containing 50% polyfunctional (meth) acrylate, LOO% by weight, Since the polymerizable unsaturated monomer is polymerized using 50% to 100% by weight of polyfunctional (meth) acrylate in the later-described polyfunctional monomer during swelling and polymerization. For example Compared to the case where a large amount of dibutenebenzene is used, more polyfunctional (meth) acrylate is present on the surface of the fine particles than divinylbenzene, and the glass transition point on the surface of the spherical resin particles is much higher than that of divinylbenzene.
- the content of polyfunctional (meth) acrylate in the polymerizable unsaturated monomer to be used is 50 to: LOO wt%, and the seed particles are absorbed at a swelling degree of 10 to: LOO times.
- the polymerizable unsaturated monomer may be polymerized.
- the method for producing spherical fine particles of the present invention 2 comprises dispersing a polymerizable unsaturated monomer and a polymerization initiator in water, and then having a weight average molecular weight of 2000 to 15000 and a weight average molecular weight Z number average. It is necessary that the seed particles having a molecular weight of 1.6 or less are absorbed with a degree of swelling of 10 to: LOO times and polymerized with a polymerizable unsaturated monomer to obtain polymer fine particles.
- the weight average molecular weight of the seed particles in the present invention 2 is 2000 to 15000. If the weight average molecular weight is less than 2000, the seed particles are likely to coalesce, and monodisperse spherical particles are difficult to be formed. If it exceeds 15000, the polymerizable unsaturated monomer added later is absorbed. It becomes difficult to swell and the swelling ability is lowered, so that uniform swelling does not occur and the surface of the spherical resin fine particles may not be smooth.
- the molecular weight is a molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC).
- the weight average molecular weight Z number average molecular weight of the seed particles is required to be 1.6 or less. Weight average molecular weight If the Z number average molecular weight exceeds 1.6, it will be difficult to uniformly absorb polymerizable unsaturated monomers added later, and the surface of the spherical fine particles will not be evenly swollen and smooth. There are things. [0032] The swelling degree of the seed particles absorbed in the seed particles needs to be 10 to: LOO times. If the degree of swelling is less than 10 times, the swelling is insufficient and the surface of the spherical resin particles may not be smooth due to heat shrinkage during polymerization. The surface of the spherical resin particles may not be smooth because the saturated monomer cannot be absorbed and cannot swell.
- the degree of soot swelling is defined as the volume ratio of the fine particles after swelling to the seed particles before swelling.
- the end of absorption is determined by confirming the enlargement of the particle diameter by observation with an optical microscope, for example.
- the weight average molecular weight of the seed particles in the present invention 2 is 2000 to 15000 and the weight average molecular weight Z number average molecular weight is 1.6 or less, the polymerizable unsaturated monomer added later is obtained even at a high degree of swelling. It is possible to dissolve and absorb the polymer, etc., and it will swell sufficiently and become a uniform swelling, so that the resulting spherical resin particles will not become uneven even when heat-shrinked during polymerization, and the surface will be smooth. Escaped.
- the seed particle is not particularly limited as long as it absorbs a polymerizable unsaturated monomer and a polymerization initiator, but a polymer containing 50% by weight or more of styrene and its derivatives is preferable. Used.
- styrene derivative examples include p-methylstyrene, p-chlorostyrene, p-chloromethylstyrene, p-methoxystyrene, and the like. These may be used alone or in combination of two or more. .
- (meth) acrylic acid esters and derivatives thereof, butadiene and the like are used as components other than the styrene and derivatives thereof.
- (meth) acrylic acid ester means methacrylic acid ester or acrylic acid ester.
- a soap-free polymerization method or a dispersion polymerization method is used as a method for polymerizing the seed particles.
- the method is not limited to these methods, and a known technique can be applied.
- the polymerization initiator used in the polymerization of the seed particles may be the one used in the usual soap-free polymerization method or dispersion polymerization method, and is not particularly limited.
- potassium persulfate or azo A system initiator or the like can be used.
- the weight average molecular weight is 2000 to 15000 and the weight is Weight average molecular weight
- a chain transfer agent is preferably used.
- a chain transfer agent generally used in the polymerization can be used, and is not particularly limited.
- an alkyl mercabtan chain transfer agent having 10 or less carbon atoms may be used. it can.
- the seed particles have a number average particle size of 0.1 to 10 ⁇ m and a CV value (value obtained by dividing the standard deviation in the particle size distribution by the number average particle size as a percentage) of 10%.
- the following non-crosslinked particles are preferred:
- the polymerizable unsaturated monomer is not particularly limited, and examples thereof include monofunctional monomers and polyfunctional monomers. These may be used alone or in combination of two kinds. May be. Of the polymerizable unsaturated monomers, the proportion of the polyfunctional monomer is decreased, the mechanical strength of the polymer fine particles is reduced. Therefore, 15% by weight or more is preferable, more preferably 30% by weight. That's it. In addition, the ratio of the polyfunctional monomer is 100% by weight, that is, all the polyfunctional monomers may be used.
- the monofunctional monomer is not particularly limited.
- styrene styrene; styrene derivatives such as a-methylstyrene, p-methylstyrene, p-chlorostyrene, chloromethylstyrene; Butyl esters such as propionate butyl; atari mouth unsaturated-tolyl such as nitrile; methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, (meth) acrylic acid 2- (Meth) acrylic acid esters such as ethylhexyl and stearyl (meth) acrylate; (meth) acrylic acid ester derivatives; conjugated gens such as butadiene and isoprene, and the like. Two or more kinds may be used in combination. Two or more kinds may be used in combination.
- the polyfunctional monomer is not particularly limited.
- divinylbenzene ethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, polytetramethylene glycol di (meta ) Atalylate, 1, 6-hexanediol di (meth) atalylate, neopentylglycol di (meth) talylate, trimethylolpropane tri (meth) atalylate, tetramethylolmethanetri (meth) atalylate, tetra
- polyfunctional (meth) acrylates such as methylolpropane tetra (meth) acrylate, which are used alone. Two or more kinds may be used in combination.
- polyfunctional (meth) acrylate is considered to lower the glass transition point on the surface of the spherical resin particles as described above. Due to the low glass transition point due to the presence of this polyfunctional (meth) tararylate, when the spherical resin fine particles are used as a spacer for a liquid crystal display element, the movement after spraying onto the liquid crystal panel is further less likely to occur.
- the polymerizable unsaturated monomer preferably contains 50 to: LOO wt% of multi-functional (meth) acrylate.
- the polymerization initiator is not particularly limited as long as it can be dispersed in water.
- an oil-soluble polymerization initiator is preferably used.
- oil-soluble polymerization initiator examples include benzoyl peroxide, lauroyl peroxide, benzoyl peroxide, benzoyl orthomethoxy, benzoyl peroxide 3, 5, 5-trimethylhexanoyl peroxide, t- butyl peroxide 2— Organic peroxides such as ethylhexanoate and di-t-butyl peroxide; Is mentioned.
- the polymerizable unsaturated monomer and the polymerization initiator are dispersed in water and then absorbed by seed particles, and the polymerizable unsaturated monomer is polymerized to polymerize the polymer. Specifically, it is necessary to obtain fine particles. Specifically, for example, the polymerizable unsaturated monomer is finely dispersed in water together with an oil-soluble polymerization initiator to form a finely dispersed emulsion, and then the finely dispersed emulsion is obtained.
- seed particles seed particle dispersion
- seed particle dispersion seed particle dispersion
- the polymerizable unsaturated monomer and the oil-soluble polymerization initiator are adsorbed and absorbed on the seed particles, and then polymerization is performed.
- the production method of the present invention 2 comprises a polybular alcohol having a weight average molecular weight of 10,000 to 100,000. It is preferable to polymerize the polymerizable unsaturated monomer by adding a monomer as a dispersion stabilizer.
- Polyvinyl alcohol which is a dispersion stabilizer, can be present on the surface of the polymer fine particles, and the polymer fine particles obtained by the presence of polybulle alcohol having a weight average molecular weight of 10,000,000 to 100,000 on the surface of the polymer fine particles.
- polybulle alcohol having a weight average molecular weight of 10,000,000 to 100,000 on the surface of the polymer fine particles.
- the presence of polybutyl alcohol on the surface of the polymer fine particles means that polyvinyl alcohol exists on the surface of the polymer fine particles without being removed by washing even after the polymer fine particles are sufficiently washed while being heated. That means.
- Polybutalol used as a dispersion stabilizer acts as a dispersion stabilizer for seed particles when the seed particles are dispersed in an aqueous dispersion medium. Furthermore, polymerization initiation with a polymerizable unsaturated monomer is initiated on the seed particles. It also acts as a dispersion stabilizer for the swollen seed particles after absorbing and swelling the agent. Therefore, polybulualcohol may be added when the seed particles are dispersed in an aqueous dispersion medium (hereinafter also referred to as initial addition agent), and a polymerizable unsaturated monomer and a polymerization initiator are added to the seed particles. It may be added after absorbing and swelling (hereinafter also referred to as late addition). Moreover, you may use initial addition and late addition together.
- initial addition agent aqueous dispersion medium
- late addition a polymerizable unsaturated monomer and a polymerization initiator are added to the seed particles. It may be added after absorbing and swelling (her
- the polyvinyl alcohol preferably has a weight average molecular weight of 10,000 to 100,000. When the weight average molecular weight is less than 10,000, the effect as a dispersion stabilizer may be reduced. When the weight average molecular weight exceeds 100,000, the seed particles may easily aggregate when initially added.
- the amount of the polybulal alcohol added is preferably 0.5 to 500 parts by weight per 100 parts by weight of the seed particles. If the amount added is less than 0.5 parts by weight, the effect as a dispersion stabilizer may be reduced. If it exceeds 5000 parts by weight, seed particles may easily aggregate when initially added.
- a surfactant or a polymer dispersion stabilizer may be further added to improve the dispersion stability.
- surfactant examples include key-on surfactants such as sodium lauryl sulfate, triethanolamine lauryl sulfate, and sodium lauryl benzene sulfonate.
- polymer dispersion stabilizer examples include polyvinyl pyrrolidone, gelatin, starch, hydroxyethyl cellulose, polybutyl ether, and the like.
- both components may be mixed in advance and finely dispersed, or each component may be separately finely dispersed and then both components may be mixed.
- the particle size of the finely dispersed emulsion is preferably smaller than the particle size of the seed particles.
- By selecting such a particle size it is possible to increase the rate at which the polymerizable unsaturated monomer and the polymerization initiator are finely dispersed in water and adsorbed and diffused onto the seed particles. When this diffusion rate becomes slow, the particle size distribution accuracy of the polymer fine particles to be produced deteriorates.
- the finely dispersed emulsion is adsorbed on the seed particles, for example, by mixing the seed particle dispersion and the finely dispersed emulsion and stirring at room temperature for 1 to 12 hours. Adsorption can be promoted by heating to C.
- the polymerization temperature in the production method of the present invention 2 is a force that can be appropriately selected depending on the type of polymerizable unsaturated monomer and polymerization initiator used. Usually, 25 to: LOO ° C is preferred. More preferably, it is 60 to 90 ° C.
- the polymerization is preferably started after the polymerizable unsaturated monomer and the polymerization initiator are completely adsorbed and absorbed by the seed particles.
- the polymer fine particles after polymerization can usually be separated from the medium by centrifugation or the like.
- the separated polymer fine particles can be purified by repeatedly washing with alcohol or water. After washing, it can be isolated as polymer fine particles by spray drying or reduced pressure drying.
- a spacer for a liquid crystal display element having a particle force obtained by using the spherical resin particles of the present invention 1 or the spherical resin particles produced by the method of producing the spherical resin particles of the present invention 2 is also provided. This is one of the present inventions.
- the spacer for a liquid crystal display element of the present invention 3 is a spherical resin fine particle of the present invention 1 or the present invention. It consists of particles obtained by using the spherical resin particles produced by the method for producing spherical resin particles of No. 2.
- the spacer for a liquid crystal display element of the present invention 3 has a particle force obtained by using spherical resin particles having a smooth surface, so that the surface is smooth and hardly moves after being dispersed on the liquid crystal panel. A spacer is obtained.
- the spacer for the liquid crystal display element of the third aspect of the present invention has a polyfunctional (meth) atarylate of 50 to 10
- the above-mentioned spacer for liquid crystal display element is used to keep the thickness of the liquid crystal layer uniform and constant in the liquid crystal display element.
- the spherical resin particles in the present invention are used as a spacer for a liquid crystal display element, carbon black, a disperse dye, an acid dye, a basic dye, a metal oxide are used in order to improve the contrast of the liquid crystal display element. It may be treated as a colored spherical resin fine particle by performing a treatment with the like.
- the spacer for a liquid crystal display element can be used as a functional spacer by providing a new surface layer on the surface thereof.
- a new surface layer on the surface thereof.
- an adhesive layer on the surface, it is possible to provide a migration-preventing spacer that adheres to the substrate, and by providing a layer with a small surface energy, it is possible to regulate the alignment of liquid crystals.
- a spacer for preventing abnormal orientation with a reduced level can be formed by a coating method such as a coacervation method, an interfacial polymerization method, or a mechanochemical method.
- the present invention is constituted as described above, spherical resin particles having a smooth surface even by the seed polymerization method, a method for producing the spherical resin particles, and a surface using the spherical resin particles, As a result, it became possible to obtain a spacer for liquid crystal display elements that is smooth and hardly moves after being spread on the liquid crystal panel.
- the spacer for a liquid crystal display element of the present invention contains 90% by weight or more of a polymer composed of a polymerizable unsaturated monomer containing 50% by weight or more of a polyfunctional (meth) acrylate.
- Cross-linked cage In the case of fat, it is a cross-linked fat that does not easily move after being sprayed on the liquid crystal panel, and therefore has an appropriate mechanical strength.
- the obtained polystyrene seed particles A were measured for molecular weight by GPC (gel permeation chromatography). As a result, the weight average molecular weight was 6000, and the weight average molecular weight Z number average molecular weight was 1.5. In addition, the number average particle diameter measured by a MICROTRAC particle size analyzer “MODEL9320-X100” manufactured by Nikkiso Co., Ltd. was 1.1 ⁇ m.
- Polystyrene seed particles B were obtained in the same manner as the seed particles A, except that 1.6 parts by weight of azobisisopetite-tolyl was used instead of 8 parts by weight.
- the obtained polystyrene seed particles B were measured for molecular weight by GPC. As a result, the weight average molecular weight was 26000, and the weight average molecular weight Z number average molecular weight was 2.4. The number average particle diameter measured in the same manner as in the seed particle A was 1. l / z m.
- the seed particle dispersion thus obtained was mixed with 42.9 parts by weight of dibutylbenzene and benzoyl peroxide. 2. 4 parts by weight, ethanol 21.4 parts by weight, lauryl sulfate triethanolamine aqueous solution 1.9 parts by weight was added to ion-exchanged water 235.6 parts by weight and finely dispersed using a static dispersion device The emulsion was added dropwise with stirring.
- the obtained dispersion was washed with hot water and centrifuged, then further washed, filtered, and dried under vacuum to obtain spherical resin particles.
- the number average particle diameter and CV value of the spherical resin particles were determined using “Multisizer 1” manufactured by Beckman Coulter.
- magnification is 20000 times for 1 ⁇ m to less than 4 ⁇ m, 15000 times for 4 ⁇ m to less than 7 ⁇ m, 10000 times for 7 ⁇ m to less than 10 ⁇ m, 10 ⁇ m to 15 ⁇ m Less than 5000 times.
- the protrusions appearing in concentric circles having a diameter of 1Z2 of the spherical coagulant fine particle diameter were divided, the number of the divided areas was counted, and the average was obtained.
- the obtained spherical resin particles are used as a spacer for a liquid crystal display device, and are sprayed on a liquid crystal panel with a sprayer manufactured by Nisshin Engineering Co., Ltd.
- Air blow was performed for 5 seconds from a distance of 30 mm diagonally at 45 ° with an air pressure of kPa, and the number of particles before and after the air blow was counted.
- the ratio of the number of remaining particles after air blowing was calculated with respect to the number of particles on the liquid crystal panel before air blowing, and the percentage was obtained as a percentage.
- Example 1 spherical resin particles were obtained in the same manner as in Example 1 except that 42.9 parts by weight of divinylbenzene was not used and 42.9 parts by weight of polytetramethylene glycol ditalylate was used instead. .
- the resulting seed particle dispersion was ion-exchanged with 17.7 parts by weight of dibutenebenzene, 0.7 parts by weight of benzoyl peroxide, 5.8 parts by weight of ethanol, and 0.5 parts by weight of an aqueous solution of triethanolamine lauryl sulfate.
- the emulsion obtained by fine dispersion using a static dispersion apparatus was added dropwise with stirring.
- the obtained dispersion was washed with hot water and centrifuged, then further washed, filtered, and vacuum-dried to obtain spherical resin particles.
- Example 1 7 parts by weight of polystyrene seed particles AO. Spherical resin particles were obtained in the same manner as in Example 1 except that 7 parts by weight of styrene seed particles BO were used.
- Comparative Example 1 spherical resin particles were obtained in the same manner as in Comparative Example 1, except that 1.7 parts by weight of polystyrene seed particles A1 were not used and 1.7 parts by weight of polystyrene seed particles B were used instead.
- the number of the divided regions is 10 or less and the surface is a smooth spherical resin particle.
- Example FE-SEM type electron micrographs of the spherical greaves particles obtained in Example 2 and Comparative Example 2 are shown in FIG. 1, FIG. 2, and FIG. 3, respectively.
- the fixing rate is excellent because the example is a spherical resin particle having a smooth surface, and Example 2 is a spherical resin particle using a specific amount of polyfunctional acrylate, and thus the fixing rate is further excellent. Yes.
- spherical resin particles having a smooth surface even by seed polymerization a method for producing the spherical resin particles, and a liquid crystal having a smooth surface using the spherical resin particles. It is possible to provide a spacer for a liquid crystal display element that hardly moves after being sprayed on a panel.
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Polymerisation Methods In General (AREA)
- Graft Or Block Polymers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020077006920A KR101190990B1 (ko) | 2004-09-28 | 2005-09-27 | 구형 수지 미립자, 구형 수지 미립자의 제조 방법, 및 액정표시 소자용 스페이서 |
JP2006537740A JP4268639B2 (ja) | 2004-09-28 | 2005-09-27 | 球状樹脂微粒子、球状樹脂微粒子の製造方法、及び液晶表示素子用スペーサ |
US11/662,099 US20070255016A1 (en) | 2004-09-28 | 2005-09-27 | Spherical Resin Fine Particle, Method of Producing Spherical Resin Fine Particle, and Spacer for Liquid Crystal Display Device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-282806 | 2004-09-28 | ||
JP2004282806 | 2004-09-28 | ||
JP2005014666 | 2005-01-21 | ||
JP2005-014666 | 2005-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006035749A1 true WO2006035749A1 (ja) | 2006-04-06 |
Family
ID=36118894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/017704 WO2006035749A1 (ja) | 2004-09-28 | 2005-09-27 | 球状樹脂微粒子、球状樹脂微粒子の製造方法、及び液晶表示素子用スペーサ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070255016A1 (ja) |
JP (1) | JP4268639B2 (ja) |
KR (1) | KR101190990B1 (ja) |
TW (1) | TWI274066B (ja) |
WO (1) | WO2006035749A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100835846B1 (ko) | 2006-09-20 | 2008-06-09 | 인하대학교 산학협력단 | 개선된 씨드중합으로 균일한 입도분포를 갖는 가교된비닐계 고분자 입자를 제조하는 방법 |
JP2008233170A (ja) * | 2007-03-16 | 2008-10-02 | Konica Minolta Business Technologies Inc | 非球形樹脂粒子連結体およびその製造方法 |
JP5689975B2 (ja) * | 2011-09-27 | 2015-03-25 | 積水化成品工業株式会社 | 樹脂組成物層用スペーサー粒子およびその用途 |
JP2019035097A (ja) * | 2014-09-30 | 2019-03-07 | 積水化成品工業株式会社 | 重合体粒子及びその用途 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63189413A (ja) * | 1987-01-30 | 1988-08-05 | Japan Synthetic Rubber Co Ltd | 架橋ポリマ−粒子の製造方法 |
JPH08239406A (ja) * | 1995-03-02 | 1996-09-17 | Sekisui Chem Co Ltd | 重合体微粒子の製造方法 |
JP2004018557A (ja) * | 2002-06-12 | 2004-01-22 | Nisshinbo Ind Inc | リビングラジカル重合開始基を有するポリマー微粒子及びその製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004144849A (ja) * | 2002-10-22 | 2004-05-20 | Sekisui Chem Co Ltd | 液晶表示装置の製造方法 |
-
2005
- 2005-09-27 KR KR1020077006920A patent/KR101190990B1/ko active IP Right Grant
- 2005-09-27 WO PCT/JP2005/017704 patent/WO2006035749A1/ja active Application Filing
- 2005-09-27 US US11/662,099 patent/US20070255016A1/en not_active Abandoned
- 2005-09-27 JP JP2006537740A patent/JP4268639B2/ja active Active
- 2005-09-28 TW TW094133772A patent/TWI274066B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63189413A (ja) * | 1987-01-30 | 1988-08-05 | Japan Synthetic Rubber Co Ltd | 架橋ポリマ−粒子の製造方法 |
JPH08239406A (ja) * | 1995-03-02 | 1996-09-17 | Sekisui Chem Co Ltd | 重合体微粒子の製造方法 |
JP2004018557A (ja) * | 2002-06-12 | 2004-01-22 | Nisshinbo Ind Inc | リビングラジカル重合開始基を有するポリマー微粒子及びその製造方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100835846B1 (ko) | 2006-09-20 | 2008-06-09 | 인하대학교 산학협력단 | 개선된 씨드중합으로 균일한 입도분포를 갖는 가교된비닐계 고분자 입자를 제조하는 방법 |
JP2008233170A (ja) * | 2007-03-16 | 2008-10-02 | Konica Minolta Business Technologies Inc | 非球形樹脂粒子連結体およびその製造方法 |
JP5689975B2 (ja) * | 2011-09-27 | 2015-03-25 | 積水化成品工業株式会社 | 樹脂組成物層用スペーサー粒子およびその用途 |
JP2019035097A (ja) * | 2014-09-30 | 2019-03-07 | 積水化成品工業株式会社 | 重合体粒子及びその用途 |
Also Published As
Publication number | Publication date |
---|---|
TW200621879A (en) | 2006-07-01 |
US20070255016A1 (en) | 2007-11-01 |
JPWO2006035749A1 (ja) | 2008-05-15 |
KR101190990B1 (ko) | 2012-10-12 |
TWI274066B (en) | 2007-02-21 |
JP4268639B2 (ja) | 2009-05-27 |
KR20070072503A (ko) | 2007-07-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4985469A (en) | Polymeric particles and their preparation | |
JP3084080B2 (ja) | ポリマー粒子の調製 | |
JPH0721011B2 (ja) | 中空重合体粒子の製造方法 | |
WO2006035749A1 (ja) | 球状樹脂微粒子、球状樹脂微粒子の製造方法、及び液晶表示素子用スペーサ | |
JPS61215603A (ja) | 重合体粒子の製造方法 | |
JP2000191818A (ja) | 多孔質微粒子の製造方法 | |
KR100729173B1 (ko) | 단분산 씨드 입자를 이용한 단분산성 가교 폴리머 비드의제조 방법 | |
JP2679523B2 (ja) | 中空重合体ラテックスの製造方法 | |
JP2002179708A (ja) | 表面凹部を多数有する高分子微粒子の製造方法 | |
JP3487665B2 (ja) | 重合体微粒子の製造方法 | |
CN100500703C (zh) | 球状树脂微粒、球状树脂微粒的制造方法以及液晶显示元件用隔片 | |
JPS61225254A (ja) | 均一粒径微粒子及びその製造方法 | |
JP3130437B2 (ja) | 大きさの揃った重合体粒子の製造方法 | |
JP2556453B2 (ja) | 中空重合体粒子の製造方法 | |
JP2005232426A (ja) | 開口微粒子及びその製造方法 | |
JP2006267513A (ja) | 液晶表示素子用スペーサ | |
JPH0717688B2 (ja) | 高架橋ポリマー粒子およびその製造方法 | |
JP2006047959A (ja) | 液晶表示素子用スペーサの製造方法、及び液晶表示素子用スペーサ | |
JP3534862B2 (ja) | 高単分散微粒子の製造方法 | |
JP4183478B2 (ja) | 液晶表示素子用スペーサ | |
KR100996863B1 (ko) | 분진이 날리지 않으며 조액안정성이 증대된 고분자 입자및 그 제조방법 | |
KR100662169B1 (ko) | 마이크론 크기의 단분산 가교 고분자 미립자의 제조 방법 | |
JPS6284156A (ja) | 均一粒径微粒子及びその製造方法 | |
JP2006321940A (ja) | 微粒子表面にホットメルト樹脂コーティング被膜を形成する方法、接着性微粒子、液晶セルスペーサー及び液晶表示素子 | |
JPS62227902A (ja) | 耐溶剤型多孔性均一粒径微粒子の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006537740 Country of ref document: JP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 11662099 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200580032631.0 Country of ref document: CN Ref document number: 1020077006920 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase | ||
WWP | Wipo information: published in national office |
Ref document number: 11662099 Country of ref document: US |