WO2007114259A1 - 中空ポリマー粒子、着色中空ポリマー粒子及びそれらの製造方法 - Google Patents
中空ポリマー粒子、着色中空ポリマー粒子及びそれらの製造方法 Download PDFInfo
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- WO2007114259A1 WO2007114259A1 PCT/JP2007/056884 JP2007056884W WO2007114259A1 WO 2007114259 A1 WO2007114259 A1 WO 2007114259A1 JP 2007056884 W JP2007056884 W JP 2007056884W WO 2007114259 A1 WO2007114259 A1 WO 2007114259A1
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- 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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/10—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of amides or imides
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- 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
- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/22—Esters containing halogen
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- 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
- C08F220/00—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
-
- 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
- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/32—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
- C08F220/325—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals containing glycidyl radical, e.g. glycidyl (meth)acrylate
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- 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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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- 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
- C08F220/00—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
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
-
- 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
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/36—Amides or imides
- C08F222/38—Amides
- C08F222/385—Monomers containing two or more (meth)acrylamide groups, e.g. N,N'-methylenebisacrylamide
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- 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
- C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
- C08F230/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal
- C08F230/08—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon
- C08F230/085—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
- Y10T428/2985—Solid-walled microcapsule from synthetic polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
- Y10T428/2985—Solid-walled microcapsule from synthetic polymer
- Y10T428/2987—Addition polymer from unsaturated monomers only
Definitions
- the present invention relates to hollow polymer particles, and more particularly, to a hollow polymer particle having a thin shell wall and a high porosity, a colored hollow polymer particle, and a simple production method thereof.
- Hollow polymer particles are widely used as microcapsules containing various functional substances inside the particles.
- it because it has unique light scattering characteristics due to internal pores, it is a coating material on paper, fiber, leather, etc. 'Light scattering agent for imparting performance such as gloss, opacity, whiteness, etc. in the field of paint etc. It is also known to be useful as a light scattering aid.
- the inside is hollow, it can be expected to be bulky and lightweight and have a heat insulation effect.
- a method for producing hollow polymer particles using a dynamic swelling method is disclosed (for example, see Patent Document 2).
- a hydrophilic organic solvent for example, polystyrene particles in a hydrophilic organic solvent are disclosed.
- a monomer such as divinylbenzene
- a water-insoluble organic solvent such as toluene
- an oil-soluble polymerization initiator such as azobisisobutyl butyl-tolyl
- the soluble organic solvent dissolves the seed polymer particles, and droplets containing the seed polymer particles, the monomer, the water-insoluble organic solvent, and the oil-soluble polymerization initiator are obtained.
- the monomers in the droplets are polymerized to form a first shell layer composed of a polymerized film of the monomers, and inside thereof There are seed polymer particles dissolved in a water-insoluble organic solvent.
- the water-insoluble organic solvent in the core portion is volatilized, and the seed polymer particles are adhered to the inner side of the shell layer formed of the monomeric polymer coating. Hollow polymer particles having a layer are obtained.
- the seed polymer particles are required as described above, and these are dispersed in a hydrophilic organic solvent. Thereafter, the seed polymer particles must be swelled by the dynamic swelling method, seed polymerization, and so on.
- the hollow polymerizable particles obtained by this method also have a second shell layer formed from a seed polymer on the inner wall, so that the size of particles obtained with a low porosity is on the order of micrometers. The nano-sized particles cannot be obtained.
- any of the above-mentioned methods for producing hollow polymer particles includes a hollow structure based on a spontaneous structure process of molecules utilizing polymerization activity based on a polymerizable monomer molecular structure, changes in physical properties of a growing polymer accompanying polymerization of the monomer, etc. It is completely unrelated to the induction method, and hollow particles can be obtained by increasing the number of processes based on processing methods. In the production of hollow polymer particles by radical polymerization, the development of energy-saving and low-environmental load manufacturing processes that are still often dependent on this method is a challenging issue.
- a method for obtaining hollow microparticles by carrying out a reaction is also disclosed (for example, see Non-patent Document 1). O In this method, first, an aqueous solution in which N-isopropylatyramide and tetraethylenepentamine are dissolved is subjected to radical polymerization.
- toluene oil layer
- dibutene benzene a cross-linking agent
- peroxybenzoyl is added to the oil phase, and at the water Z oil interface, an acid-reduction reaction between the peroxide and tetraethylenepentamine dissolved in the water droplets is caused.
- the generated radicals cause a polymerization reaction of N-isopropylacrylamide in the water droplets.
- Poly (N-isopropylacrylamide) that grows in water droplets is a thermosensitive poly Therefore, when the temperature of the reaction system is higher than the lower critical eutectic temperature (LCST, 32-34 ° C) of poly (N-isopropylacrylamide), it changes to hydrophobic, and the water Z oil interface is more than in the water droplets. Move to At that interface, a copolymerization reaction proceeds with the cross-linking agent divinylbenzene dissolved in the oil phase, and a crosslinked polymer that is insoluble in water and oil is formed at the water Z oil interface. As a result, hollow particles having water droplets in a bowl shape can be obtained.
- LCST lower critical eutectic temperature
- Non-Patent Document 1 the polymerization process itself requires the use of an emulsifier to form a WZO-type inverse emulsion, so that hollow particles can be obtained without going through a plurality of steps. It was necessary to perform complicated operations throughout the process, such as the selection of the type of emulsifier, the amount used, and the emulsification method. Moreover, in this method, radical polymerization reaction is performed.
- Patent Document 1 Japanese Patent Laid-Open No. 6-248012
- Patent Document 2 JP-A-8-020604
- Patent Document 3 Japanese Patent Laid-Open No. 2003-096108
- Non-Patent Document 1 Q. Sun, et al., “Journal 'Ob. American' Chemical 'Society”, 127th, 2005, p. 8274 -8275
- an object of the present invention is to provide nanometer-order hollow polymer particles and colored hollow polymer particles having a high porosity, It is an object of the present invention to provide a simple and low environmental load production method that utilizes a pseudo-emulsion radical polymerization process that does not require the use of a dispersion stabilizer such as a surfactant.
- the present inventors have found that the radical polymerizable water-soluble monomer (A) and the radical polymerizable water-insoluble monomer (B). Is polymerized in an aqueous medium to form hollow polymer particles having a hydrophilic surface and a high porosity while spontaneously forming polymer aggregates during the polymerization reaction.
- the headline and the present invention were completed.
- the present invention polymerizes the monomer group (I) containing the radical polymerizable water-soluble monomer (A) and the radical polymerizable insoluble monomer (B). It also has shell wall strength with the copolymer as the main component, and the shell wall thickness is 5 ⁇ !
- the present invention provides a hollow polymer particle characterized by having a thickness of ⁇ 80 nm and a method for producing the same.
- the present invention polymerizes a monomer group (I) containing a radical polymerizable water-soluble monomer (A) and a radical polymerizable water-insoluble monomer (B).
- the present invention also provides a colored hollow polymer particle and a method for producing the same, characterized by having a shell wall force comprising a copolymer (X) and a colorable compound (Y) obtained as main constituents.
- hollow polymer particles having a high porosity can be obtained.
- the hollow polymer particles comprise a radically polymerizable water-soluble monomer and a radically polymerizable water-insoluble monomer, which are the production method of the present invention, and a water-soluble polymerization initiator in an aqueous medium. It can be obtained by a simple and reproducible method of using pseudo-emulsion radical polymerization.
- the resulting hollow polymer particles are also monodisperse, with a shell wall thickness of 5 ⁇ ! Since the surface thinned to ⁇ 80 nm is hydrophilic, it exists stably in an aqueous medium.
- the hollow polymer particles can be incorporated with various functional molecules in the hollow during or after the production, and have various functions based on the incorporated functional molecules. be able to.
- colored hollow polymer particles can also be obtained by physically bonding (adsorbing) or chemically bonding the coloring compound.
- the hollow polymer particles of the present invention are water-based coatings. It can be used as a light-scattering improver and white pigment for imparting properties such as gloss, opacity, and whiteness to paper, fibers, leather, etc., utilizing the unique light-scattering characteristics due to internal pores. In addition, it can be applied to cosmetics utilizing light diffusibility, water absorption, and oil absorption by a hollow structure, and can also be used as an ink jet receiving layer. In addition, since it has a hollow structure, heat conduction and sound conduction can be suppressed, so that it can be applied as a heat insulating material or a sound insulation material, and can be used as a lightening agent because the weight in the same volume can be reduced. Furthermore, it can also be used as a chemical substance holding agent that contains various chemical substances inside, and it is a chemical substance sustained release that releases components contained inside by some stimulus such as heat, pressure, pH change, etc. It can also be used as an agent and DDS material.
- the method for producing hollow polymer particles of the present invention does not require complicated steps over multiple steps, uses a conventional radical polymerization method, and is inexpensive for the above-mentioned various uses. In addition, it is easy to design the structure according to various applications.
- FIG. 1 is a particle size distribution of the hollow polymer particles obtained in Example 1 by dynamic light scattering measurement.
- FIG. 2 is an SEM observation image showing the form of the hollow polymer particles obtained in Example 1.
- FIG. 3 S representing the hollow morphology observed by crushing the hollow polymer particles obtained in Example 1
- FIG. 4 is an FE-SEM observation image showing a hollow form observed by crushing the hollow polymer particles obtained in Example 1.
- FIG. 5 is a 1 H-NMR ⁇ vector of the hollow polymer particles obtained in Example 1 in heavy water.
- FIG. 6 is an SEM observation image showing the form of hollow polymer particles obtained in Example 2.
- FIG. 7 S representing the hollow morphology observed by crushing the hollow polymer particles obtained in Example 2
- FIG. 8 is a SEM observation image showing a hollow form observed by crushing the hollow polymer particles obtained in Example 3.
- FIG. 9 is an SEM observation image showing a hollow form observed by crushing the hollow polymer particles obtained in Example 4.
- FIG. 10 is a SEM observation image showing a hollow form observed by crushing the hollow polymer particles obtained in Example 5.
- FIG. 11 is an SEM observation image showing a hollow form observed by crushing the hollow polymer particles obtained in Example 6.
- FIG. 12 is an SEM observation image showing a hollow form observed by crushing the hollow polymer particles obtained in Example 27.
- FIG. 13 is an SEM observation image showing a hollow form observed by crushing the colored monodispersed hollow polymer particles obtained in Example 35.
- FIG. 14 is a fluorescence emission spectrum of the colored hollow polymer particles obtained in Example 35.
- FIG. 15 is an SEM observation image showing a hollow form observed by crushing the colored hollow polymer particles obtained in Example 36.
- FIG. 16 is a fluorescence emission spectrum of the colored hollow polymer particles obtained in Example 36.
- the hollow polymer particles of the present invention use a radical polymerizable water-soluble monomer (A) and a radical polymerizable water-insoluble monomer (B) as essential raw materials. It has a polymer layer obtained by copolymerization of (I) as a shell, and its thickness is as thin as 5 nm to 80 nm. By adjusting the types and usage ratios of the water-soluble monomer (A) and the water-insoluble monomer (B), it is possible to control the thickness of the shell as the polymer layer force in the range of 5 nm to 80 nm. Is possible. From an industrial application point of view, hollow polymer particles having a shell thickness of less than 5 nm or greater than 80 ⁇ m are undesirable.
- the thickness of the shell is less than 5 nm, the shape stability as the hollow polymer particle is deteriorated, and when it exceeds 80 nm, the carrier function when the substance is loaded in the hollow portion of the hollow polymer particle is lowered. It is.
- the polymerization activity derived from the characteristics of the monomer used as a raw material, the monomer strength, the property change of the polymer segment during the growth to a polymer, the polymerization opening If the type of initiator, polymerization medium, etc. can be used skillfully, it is considered possible to drive the molecular self-organization marker simultaneously with the polymerization reaction and induce the domain of the polymer aggregate. .
- water-soluble polymerization is initiated in the monomer group (I) containing the radical-polymerizable water-soluble monomer (A) and the radical-polymerizable water-insoluble monomer (B).
- Spontaneous formation of hollow polymer particles was completed by combining the agents and radically polymerizing them in a completely aqueous medium. That is, when two types of monomers having different polymerization activities and affinity to an aqueous medium are copolymerized, the unit of monomer 1 is rich in the copolymer, which does not necessarily result in random copolymerization. This is based on the phenomenon that the segment and monomer 2 units form a dense segment that functions as an amphiphilic polymer.
- the water-soluble monomer (A) has a much lower molar concentration than the water-insoluble monomer (B).
- the water-soluble monomer (A) is preferentially polymerized to form a hydrophilic segment derived from the monomer (A).
- the hydrophilic segment of the terminal radical grows to a certain size, a depletion interaction is strongly induced between the water-insoluble monomer droplets due to factors such as an increase in the degree of polymerization.
- the growing hydrophilic layer is concentrated on the surface of the droplet.
- the vicinity of the growth end of the hydrophilic segment is filled with the water-insoluble monomer (B). Therefore, the addition reaction of the water-insoluble monomer (B) starts at the radial growth end of the hydrophilic segment, and the polymerization of the water-insoluble monomer (B) proceeds rapidly.
- a copolymer having segments with the following properties is produced.
- the copolymer having a hydrophobic segment and a hydrophilic segment thus produced acts as a so-called polymer surfactant, and during the polymerization reaction, the copolymer spontaneously sandwiched the hydrophobic segment.
- the particle size distribution is determined by the type of water-soluble monomer (A), water-insoluble monomer (B) and water-soluble initiator used as raw materials, and the aggregates formed spontaneously depending on the blending ratio. Since it is based on monodispersion, it can be easily manufactured with a coefficient of variation of 0.1 or less.
- the shell wall of the hollow polymer particles of the present invention can be obtained with different thicknesses depending on the particle size of the particles.
- a hollow polymer particle having an average particle diameter of 50 nm or more and less than 300 nm can be prepared with a shell wall thickness of 5 nm to 30 nm, and a hollow polymer particle having an average particle diameter of 300 nm or more and less than 1 ⁇ m.
- the shell wall thickness can be 5 nm to 80 nm.
- the thickness of the shell wall can be appropriately selected within the above range according to the purpose, but it can be produced in a hollow space of 50 nm or more and less than 300 nm in order to maintain a high porosity and sufficient strength of the shell wall.
- the polymer particles have a shell wall with a thickness of 5 nm to 15 nm.
- Hollow polymer particles with an average particle size of 300 nm or more and less than 1 ⁇ m have a shell wall with a thickness of 10 nm to 40 nm. preferable.
- the thickness of the shell wall, as well as the particle diameter a uniform structure can be obtained by the spontaneous texture associated with the polymerization of the monomer. That is, the thickness of the whole shell of one particle is uniform, and the thickness of the shell of all particles obtained under the same conditions is also uniform.
- the average of the results obtained by measuring the shell thickness of the hollow polymer particles observed by SEM at 30 locations is defined as the shell wall thickness.
- the radically polymerizable water-soluble monomer (A) used in the present invention is not particularly limited, but is preferably one that dissolves 1.0% by mass or more in distilled water. Those that are arbitrarily miscible with distilled water are more preferred, and those having, for example, an amide group, amino group, oxyalkylene chain, cyano group, or acid anhydride group in the structure are used. I can do it. Further, for example, those having a carboxy group, a hydroxy group, a sulfonic acid group, a phosphoric acid group, etc., and those having an alkali metal salt or an ammonium salt thereof can be used.
- examples of the water-soluble monomer having an amide group include acrylamide N-ethylacrylamide, N-ethylmethacrylamide, N-isopropylacrylamide, N- Isopropylmethacrylamide, N-n-propylacrylamide, N-n-propylmethacrylamide, N-cyclopropylacrylamide, N-cyclopropylmethacrylamide, N, N-dimethylacrylamide, N, N-jetylacrylamide, N, N-substituted (meth) acrylamides such as N-dimethylaminopropylacrylamide, N-methyl-N-ethylacrylamide, N-methyl-N-isopropylacrylamide, N-methyl-N-n-propylacrylamide, N- Examples include di-substituted (meth) acrylamide, N-hydroxyethyl acrylamide, acryloyl morpholine, N-butyl pyrrolidone, diace
- water-soluble monomer having an amino group examples include arylamine, N, N-dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, and the like.
- water-soluble monomer having a carboxy group examples include acrylic acid, methacrylic acid, and maleic acid
- examples of the water-soluble monomer having a hydroxy group include 2-hydroxyethyl acrylate.
- water-soluble monomers having a sulfonic acid group include styrene sulfonic acid, sodium styrene sulfonate, lithium styrene sulfonate, styrene sulfonate ammonium, styrene sulfonate ethyl ester, styrene sulfonate cyclohexyl ester, 2 —Acrylamido-2-methylpropanesulfonic acid and the like.
- a quaternized monomer obtained by quaternizing a monomer synthesized by reacting pyridine or glycidyl metatalylate with an organic amine may be used.
- water-soluble monomers (A) those having an amide group, an amino group, a carboxy group or a salt thereof, a sulfonic acid group or a salt thereof in the structure are industrially available, It is preferred because of its excellent properties and ease of radical polymerization.
- N-substituted acrylamide N, N-disubstituted acrylamide is considered to have a surface-active action from the point of having a hydrophobic group and a hydrophilic group in one molecule.
- the coalescence has a special property that the degree of water solubility varies depending on the degree of polymerization and the temperature of the aqueous medium. Due to these properties, the aforementioned reaction mechanism can be easily achieved, and the hollow polymer particles of the present invention can be more easily produced.
- a homopolymer of N-substituted acrylamide N, N disubstituted acrylamide has a lower critical solution temperature (LCST) in an aqueous solution, and a coil-globule transition occurs near this temperature.
- LCST critical solution temperature
- the polymer chain hydrates and becomes hydrophilic at low temperatures.
- the unique property is related to the surface structure of the resulting hollow polymer particles.
- the size of the hollow polymer particles dispersed in an aqueous medium should be large on the low temperature side and small on the high temperature side with the LCST as a boundary! / That's it.
- the thickness of the layer exhibiting temperature responsiveness in the aqueous medium is the molar ratio of the radically polymerizable water-insoluble monomer (B) and the radically polymerizable water-soluble monomer (A) used.
- the thickness of the temperature-responsive layer is 5 ⁇ !
- the thickness of the temperature-responsive layer is 5 ⁇ !
- the radically polymerizable water-insoluble monomer (B) used in the present invention various monomers can be used as long as they have a group copolymerizable with the water-soluble monomer (A).
- the solubility in distilled water is 0.5% by mass or less.
- it has excellent reactivity with the water-soluble monomer (A) and is industrially useful. From the viewpoint of easy availability, it is preferable to use attalate or metatalate.
- Examples of the acrylate include butyl acrylate, lauryl acrylate, acrylate hexyl, acrylic acid phenol, isobutyl acrylate, glycidyl acrylate, tert-butyl-a trifluoromethyl acrylate.
- metatalates include, for example, methyl methacrylate, ethyl methacrylate, ⁇ -butyl methacrylate, i-butyl methacrylate, cyclohexyl methacrylate, lauryl methacrylate, stearyl methacrylate, glycidyl methacrylate, Aryl methacrylate, 2, 2, 2— Examples thereof include trifluoroethyl methacrylate, (3-methyl-3-oxetayl) methyl methacrylate, methacryloylpropyltrimethoxysilane, methacryloylpropyltriethoxysilane, and the like.
- radically polymerizable water-insoluble monomers (B) can be used alone or in admixture of two or more.
- (meth) atalylate used in the text is used as a general term for talate alone, metatalate alone or a mixture thereof.
- the radically polymerizable water-insoluble monomers (B) those having a cyclic ether structure such as glycidyl (meth) acrylate and oxetane (meth) acrylate are water-soluble During the formation of the copolymer with the monomer (A) or after the formation of the copolymer, it is possible to carry out a crosslinking reaction within the molecule of the copolymer or between the molecules. Therefore, the strength of the copolymer that forms the shell part of the hollow polymer particles obtained is considered to contribute to the enhancement of the stability of the hollow polymer particles.
- bifunctional di (meth) acrylate for example, ethylene di (meth) acrylate, diethylene (meth) acrylate, triethylene di (meth) acrylate
- Polyethylene di (meth) acrylates such as rate, propylene di (meth) acrylate repyrene (meth) acrylates, glycerol di (meth) acrylate, etc. can be used alone or in combination of two or more .
- the proportion of the (meth) atarylate used in the functional monomer (B) is 0.7 or more in terms of molar ratio.
- radical polymerizable water-insoluble monomer (B) other than (meth) acrylate, for example, a styrene compound, a bull ester, a bull ether, a bisbulu compound, etc. alone or 2 More than one species can be used in combination.
- the (meth) acrylate in combination from the viewpoint that the hollow polymer particles of the present invention can be easily obtained, and in particular, the (meta) in the radical polymerizable water-insoluble monomer (B).
- the use ratio of attalylate is 0.5 or more in terms of molar ratio.
- the styrenic compound is a compound having a styryl group, and includes, for example, styrene, a-methylol styrene, binole-to-ylene, ⁇ -chlorostyrene, o-, m-, p chlorostyrene, p ethynole styrene, p-tert butoxystyrene, m-tert butoxystyrene, p-acetoxystyrene, p- (1-ethoxyethoxy) styrene, p-methoxystyrene, styryltrimethoxysilane, styryltriethoxysilane, vinylnaphthalene, vinylbiphenyl , Beer anthracene, burpyrene and the like.
- bull esters examples include formic acid bull, vinyl acetate, vinyl propionate, monochrome vinyl acetate, vinyl bivalate, vinyl butyrate and the like.
- butyl ether examples include, for example, methyl vinyl ether, ethyl vinyl ether, n propyl vinyl ether, isopropyl vinyl ether, n-butino levino vinylate, isobutyl vinyl ether, 2-ethyl hexyl vinyl ether, otadecino levino vinyl Etherenole, cyclohexenolevinoreethenole, arlinolevininoreetherenore, cyclohexanedimethanolenomonobininoreether, 1,4 butanediol divininoreether, nonanediol divinylether, cyclohexanedioldi Examples include vinyl ether, cyclohexane dimethanol divinyl ether, trimethylpropane trivinyl ether, pentaerythritol tetrabutyl ether, and vinyl vinyl ether.
- Examples of the bisvinyl compound include divinyl benzene and the like, and since a cross-linked structure is formed in the shell of the hollow polymer particles, the point power capable of producing stable hollow particles is also preferable. , That is.
- the ratio of use of the radical polymerizable water-insoluble monomer (B) and the radical polymerizable water-soluble monomer (A) is as follows. Although it is selected depending on the wall thickness, etc., it is possible to obtain hollow polymer particles that can exist stably in an aqueous medium, and since the hollow structure is also stable, a radically polymerizable water-insoluble monomer (B ) And the radically polymerizable water-soluble monomer (A) (B) / (A) is preferably from 3.5 to 12, particularly preferably from 3.5 to 10. It is preferable.
- the polymerization proceeds to some extent rather than adding the monomer group (I) all at once, and hollow polymer particles are formed, thereby forming a radically polymerizable water-insoluble monomer.
- (B) When controlling the average particle diameter of the hollow polymer particles and the thickness of the shell wall
- the colored hollow polymer particle of the present invention is a combination of the above-mentioned hollow polymer particle and a coloring compound, and includes a radical polymerizable water-soluble monomer (A) and a radical polymerizable water-insoluble monomer.
- a shell wall comprising a copolymer (X) obtained by polymerizing a monomer group (I) containing the monomer (B) and a coloring compound (Y) as main components.
- any of the aforementioned can be used similarly. The same applies to the preferred monomer.
- the coloring compound (Y) in addition to a compound having light absorption in the visible light region (400 ⁇ ! To 800nm), it absorbs ultraviolet light from a photochromic molecule or the like to cause a change in chemical structure. Therefore, it is possible to use a compound that exhibits absorption in the visible light region or a compound that exhibits light emission in the visible light region.
- the colored hollow polymer particles of the present invention include a monomer group containing the radical polymerizable water-soluble monomer (A) and the radical polymerizable water-insoluble monomer (B).
- the copolymer (X) obtained by polymerizing (I) and the coloring compound (Y) may be physically bonded or chemically bonded. Further, the coloring property compound (Y) may be one type or plural at the same time. In this case, a physical bond and a chemical bond may exist at the same time.
- the colored hollow polymer particles obtained by physically bonding the copolymer (X) and the coloring compound (Y) are, for example, in the method for producing colored hollow polymer particles described later, the coloring compound.
- the colored polymer (Y) is encapsulated in the hollow polymer particles having a shell containing the copolymer (X) as a main constituent, and an aqueous medium. Is removed by drying or the like, so that the colored polymer (Y) adsorbed on the inner surface of the shell wall or dissolved in the aqueous medium becomes hollow polymer particles in the aqueous medium removal step. Is adsorbed on the surface.
- the copolymer (X) and the colorable compound (Y) are physically bonded to each other to give the colored hollow polymer particles non-radically polymerizable non-polymerizable in the method for producing the colored hollow polymer particles described later.
- a shell of hollow polymer particles containing the copolymer (X) as a main component by dissolving the coloring compound (Y) having low water solubility in the water-soluble monomer (B) and carrying out radical polymerization. Includes those in which the coloring compound (Y) is dispersed.
- the colored hollow polymer particles in which the copolymer (X) and the colorable compound (Y) are chemically bonded are, for example, reactive groups present in the copolymer (X). And a coloring compound (Y) having a group capable of chemically bonding, and reacting them together, so that a coloring compound (Y) is formed on the shell portion constituting the hollow polymer particle. It has a structure derived from it. In this case, the colorable compound (Y) is present in the shell of the hollow polymer particle by a chemical bond, thereby giving a stable colored hollow polymer particle.
- the coloring compound (Y) used in the present invention water-soluble dyes, oil-soluble dyes, and the like can be used.
- water-soluble dye various natural and organic synthetic dyes that are not particularly limited can be used as long as they are soluble in the aqueous medium used for the production of the hollow polymer particles of the present invention described later.
- azo dyes for example, azo dyes, anthraquinone dyes, indigo dyes, sulfur dyes, diphenylmethane dyes, triphenylmethane dyes, atalidine dyes, xanthene dyes, azine dyes, oxazine dyes, thiazine dyes, azomethine dyes, nitro dyes, -toro dyes , Thiazole dyes, methine dyes, polymethine dyes, cyanine dyes, porphyrins, phthalocyanine dyes, and the like can be used.
- naphthalene sulfonic acid sodium naphthalene sulfonate, sodium pyrene sulfonate and the like, such as sulfonic acid or sulfonated water-soluble compound can also be suitably used.
- water-soluble dyes can be used alone or in combination of two or more.
- the oil-soluble dye is not particularly limited as long as it is an oil-soluble dye that dissolves in the radically polymerizable water-insoluble monomer (B), a monoazo dye, a disazo dye, an anthraquinone dye, Further, condensed polycyclic pigments such as perylene-based, quinophthalone-based, and anthrapyridone-based pigments can be used.
- condensed polycyclic aromatic compounds such as naphthalene, anthracene, tetracene, pentacene, phenanthrene, thalicene, triphenylene, and pyrene and their derivative molecules, oligophenylenes such as biphenyl and terphel, and their derivative molecules
- Photochromic dyes which are azobenzene, spiropyran, spiroxazine, fulgide, diarylmethene and their derivatives can also be suitably used.
- These oil-soluble pigments are each independently Or two or more can be used in combination.
- the colored hollow polymer particles of the present invention have a shell wall thickness of 5 ⁇ ! ⁇ 80 nm is preferred. Within this thickness range, similarly to the hollow polymer particles described above, the colored hollow polymer particles are stable in water and have a wide range of applications. Also, it can be suitably used when used in combination with the aforementioned hollow polymer particles.
- the hollow polymer particles and the colored hollow polymer particles of the present invention are monomers containing a radical polymerizable water-soluble monomer (A) and a radical polymerizable water-insoluble monomer (B). It can be easily obtained by emulsion polymerization of group (I) in an aqueous medium.
- the production method of the present invention is to produce hollow polymer particles in one pot, that is, in the same reaction vessel without requiring an isolation operation, and is a radically polymerizable water-soluble monomer (A ) And a radically polymerizable water-insoluble monomer (B) are subjected to pseudo-emulsion radical polymerization in an aqueous medium using a water-soluble polymerization initiator.
- aqueous medium used for the pseudo-emulsion polymerization water alone is used, and lower alcohols such as methanol, ethanol and isopropanol, ethylene glycol, propylene glycol, butanediol, diethylene glycol, and triethylene glycol are used in water.
- lower alcohols such as methanol, ethanol and isopropanol, ethylene glycol, propylene glycol, butanediol, diethylene glycol, and triethylene glycol are used in water.
- examples thereof include polyhydric alcohols such as acetone, ketones such as acetone and methyl ethyl ketone, and ethers such as tetrahydrofuran, or a mixed solvent in which a plurality of types are mixed.
- the blending ratio thereof is such that the water-soluble polymerization initiator and the radically polymerizable water-soluble monomer (A) described later are soluble and non-radically polymerizable. If the solubility of the water-soluble monomer (B) is in the range of 0.5% by mass or less, it can be appropriately selected according to the purpose, but in order to keep the polymerization initiation efficiency by the water-soluble polymerization initiator high.
- the ratio of water is preferably 50% by mass or more, particularly 80% by mass or more.
- water-soluble polymerization initiator various ones that are not particularly limited can be used.
- a persulfate or an amino group-containing compound potassium sulfate (KPS), ammonium persulfate (APS), 2, 2, -azobis (2-amidinopropane) dihydrochloride, 2, 2, -azobis [2- (2-imidazoline 2-yl ) Propane] dihydrochloride, 2, 2, -azobis [2- (2-Imidazoline 2-yl) propane] disulfate Dihydrate, 2,2, -azobis [N— (2-carboxyethyl) 2-methylpropionamide], 2,2, -azobis (1 imino 1 pyrrolidino 2-methylpropane) dihydrochloride, 2, 2, —Azobis ⁇ 2— [1— (2-Hydroxyethyl) —2-Imidazoline—2-yl] propane ⁇ Dihydrochloride, 2, 2, 2,
- the use ratio of these water-soluble polymerization initiators is based on a total of 100 parts by mass of the radical polymerizable water-soluble monomer (A) and the radical polymerizable water-insoluble monomer (B). In the range of 0.1 to 5 parts by mass, it may be appropriately selected, but in the range of 0.5 to 3 parts by mass for the purpose of increasing the efficiency of the polymerization reaction and suppressing the aggregation of the hollow polymer particles. Is more preferable.
- the desired hollow polymer particles of the present invention can be produced without using any dispersion stabilizer such as a surfactant. If necessary, various dispersion stabilizers can be used together. It may be used. Examples of the dispersion stabilizer include an anionic surfactant, a nonionic surfactant, a cationic surfactant, an amphoteric surfactant, and an organic suspension protective agent. Among them, the hollow polymer particles are efficiently used. Therefore, it is preferable to use a cationic surfactant or a cationic surfactant.
- Examples of the cationic surfactant include rosinates such as potassium rosinate and sodium rosinate, and fatty acids such as potassium oleate, potassium laurate, sodium laurate, sodium stearate, and potassium stearate. And a sodium salt or potassium salt thereof, a sulfate ester of an aliphatic alcohol such as sodium lauryl sulfate, and an alkylaryl sulfonic acid such as sodium dodecylbenzenesulfonate.
- rosinates such as potassium rosinate and sodium rosinate
- fatty acids such as potassium oleate, potassium laurate, sodium laurate, sodium stearate, and potassium stearate.
- a sodium salt or potassium salt thereof a sulfate ester of an aliphatic alcohol such as sodium lauryl sulfate, and an alkylaryl sulfonic acid such as sodium dodecylbenzenesulfonate.
- nonionic surfactants include polyethylene glycol alkyl esters, alkyl ethers, alkyl phenyl ethers, and the like.
- Examples of the cationic surfactant include alkyl trimethyl ammonium salt, dimethyl dimethyl ammonium salt, alkyl dimethyl benzyl ammonium salt, and amine salt surfactants. Can do.
- Examples of amphoteric surfactants include alkylamino fatty acid salts, alkylbetaines, alkylamine oxides, and the like.
- dispersion stabilizers may be used alone or in combination of two or more as required.
- an ionic surfactant or a nonionic surfactant having the same charge as the surface electrification imparted to the particles by the water-soluble polymerization initiator. It is preferable to use ⁇ .
- the amount of the dispersion stabilizer used may be appropriately selected as necessary, but if the concentration at the initial stage of the reaction is too high, normal emulsion polymerization proceeds and the particles develop a hollow structure. Therefore, it is better to reduce the amount used in the initial stage and add it later as the particles are formed.
- the polymerization reaction temperature may be appropriately set within the range of 35 to 90 ° C in accordance with the polymerization initiation temperature of the water-soluble polymerization initiator to be used. It is preferable to set the temperature within the range of 40 to 85 ° C from the viewpoint of increasing the initiator startability and preventing evaporation of the aqueous medium to suppress the instability of the reaction system. It is more preferable to set within the range.
- the concentration force ⁇ ⁇ 10% by mass should also be selected. Is preferred.
- the total amount of radically polymerizable water-soluble monomer (A) and radically polymerizable water-insoluble monomer (B) used in advance in an aqueous medium was added.
- a conventional one-pot manufacturing method for radical polymerization in which polymerization is performed using a water-soluble polymerization initiator can be employed.
- a water-soluble polymerization initiator is added in a state where a radical-polymerizable water-soluble monomer (A) and a radical-polymerizable water-insoluble monomer (B) are added in advance to an aqueous medium. It can also be synthesized by a one-pot production method in which polymerization is carried out and the radical polymerization water-insoluble monomer (B) is further added while the polymerization reaction has proceeded. When using this post-addition method, The thickness of the hollow shell wall can be increased.
- the radical weight is obtained using a water-soluble polymerization initiator in a state in which the coloring compound (Y) having high water solubility is dissolved in an aqueous medium.
- the water-soluble low-coloring compound (Y) is dissolved in the radical-polymerizable water-insoluble monomer (B), and a radical-polymerizable compound is obtained using a water-soluble polymerization initiator.
- the colored hollow polymer particles of the present invention can also be obtained by polymerizing the monomer group (I) containing the water-soluble monomer (A) and the radically polymerizable water-insoluble monomer (B). Can be obtained.
- the amount of the coloring compound (Y) used may be set in an arbitrary range depending on the purpose within a range that does not inhibit the progress of the polymerization.
- the molar ratio with respect to the monomer group (I) containing the monomer (A) and the radically polymerizable water-insoluble monomer (B) is preferably 3 mol% or less, particularly preferably 1 mol% or less.
- the colored hollow polymer particles can also be obtained by adding the coloring compound (Y) after the production of the hollow polymer particles, and the coloring compound (Y) at this time can be obtained.
- the amount to be used can be used in an arbitrary ratio depending on the purpose within a range where aggregation of the resulting hollow polymer particles does not occur.
- an ionic coloring compound when used, the surface charge of the hollow polymer particles, that is, the charge derived from the functional group contained in the water-soluble monomer (A) used as a raw material is reversed. It is preferable to use one having a charge.
- a radical polymerizable coloring compound is used in combination.
- a method of polymerizing, a method of introducing a radical polymerizable functional group into a coloring compound having a reactive functional group, and polymerizing by using the resulting compound ( ⁇ ′) together, after obtaining hollow polymer particles examples include a method of chemically reacting a coloring compound with a reactive group in the copolymer constituting the hollow polymer particle.
- a radical polymerizable functional group is introduced into a colored compound having a reactive functional group, and a radical polymerizable coloring compound ( ⁇ The method of obtaining ') is preferred.
- a coloring compound having an amino group for example, 7-amino-4-methylcoumarin, 7-amino-4-trifluoromethylcoumarin, aminofluorescein, aminominophthalene, aminoanthracene, aminobilene, aminobiphenol- And glycidyl (meth) acrylate, (meth) acrylic acid chloride, etc.
- the structure derived from the coloring compound can be introduced into the shell wall constituting the hollow polymer particle, and the colored hollow polymer particle is obtained.
- the water-soluble monomer ( ⁇ ) and the water-insoluble monomer ( ⁇ ) used at this time may be the same as or different from those reacted with the coloring compound.
- the resulting radically polymerizable coloring compound ( ⁇ ′) is water-soluble, the entire amount of the radically polymerizable coloring compound ( ⁇ ) is used as the water-soluble monomer ( ⁇ ⁇ ⁇ ) used to obtain hollow polymer particles. ') May be substituted. Furthermore, when the radically polymerizable coloring compound ( ⁇ ′) is water-insoluble, the entire amount of the water-insoluble monomer ( ⁇ ) used for obtaining the hollow polymer particles is radically polymerizable. It may be replaced with a compound ( ⁇ ').
- the method of using the hollow polymer particles and colored hollow polymer particles obtained in the present invention is not particularly limited.
- aqueous coatings and paints gloss on paper, fibers, leather, etc.
- It can be used as a light scattering improver for imparting performance such as opacity and whiteness, a white pigment, a masking agent, and the like.
- It can be used for rewritable materials, anti-counterfeit coatings, and special-purpose papers that use decoloring effects and light-emitting properties.
- it can be applied to cosmetics utilizing light diffusibility, water absorption and oil absorption by a hollow structure, and can also be used as an ink jet receiving layer.
- the heat conduction and sound conduction can be suppressed due to the hollow structure, it can be applied as a heat insulating material or a sound insulation material, and can also be used as a lightening agent because the weight in the same volume can be reduced. Furthermore, it can also be used as a chemical substance holding agent that contains various chemical substances inside. It can also be used as a sustained release agent and DDS material. Further, the hollow polymer single particle containing the coloring component can be used as a labeled high-performance drug carrier or affiliation bead. In such use, the hollow polymer particles of the present invention are monodispersed and the shell wall is thin in order to efficiently and uniformly express various performances required for the application. It is considered effective and its usefulness is high.
- the particle size of the particles dispersed in water was measured by a dynamic light scattering method using a particle size measuring device FPAR-1000 manufactured by Otsuka Electronics Co., Ltd.
- NIPAM N-isopropylataliamide
- HGMA glycidinoremethacrylate
- NIPAM N-isopropylacrylamide
- GMA glycidyl metatalylate
- a particle dispersion was obtained by stirring at the same temperature for 1 hour. This dispersion was washed and purified by centrifugation. After purification, the particles were identified by dynamic light scattering, SEM, and 'H-NMR. When the particle size of the particles was measured by the dynamic light scattering method, it showed a monodispersed particle size distribution (Fig. 1). The average particle size at 25 ° C was 407 nm and the coefficient of variation was 0.03. The average particle size at 50 ° C is 325 nm, and it is confirmed that it has a temperature-responsive layer of about 40 nm. It was. SEM observation of the shape of these fine particles in a dry state revealed that they were monodispersed spherical particles (Fig. 2).
- Example 1 except that the amounts of water-soluble monomer ( ⁇ ), water-insoluble monomer ( ⁇ ), water-soluble polymerization initiator, and aqueous solution used were changed to the values shown in Table 1, Example 1 was used. In the same manner, hollow polymer particles were obtained. The property values of the obtained particles are summarized in Table 2.
- Example 6 is an example in which sodium lauryl sulfate was used as a surfactant, and a predetermined amount was added to an aqueous solution of koji and stirred uniformly.
- MBAM N, N, 1-methylenebisatalinoleamide
- ACMO Ataliloyl morpholine
- St-S03Na Sodium styrene sulphonate
- OX-MA (3-methyl-3-oxeta-l) metatalylate
- F-Et-MA 2, 2, 2—Trifluoroethyl methacrylate
- AIBA 2, 2'-azobis (2-amidinopropane) dihydrochloride
- the particle size of the particles was measured by a dynamic light scattering method, and it showed a monodispersed particle size distribution.
- the average particle size at 25 ° C was 380 nm and the coefficient of variation. It was 0. 03.
- Observation of the shape of the particles revealed monodispersed true spherical particles. When these particles were crushed and the morphology was observed, it was confirmed that the center of the particles was hollow polymer particles (Fig. 12).
- Example 27 except that the amounts of water-soluble monomer (A), water-insoluble monomer (B), water-soluble polymerization initiator, and aqueous solution used were changed to the values shown in Table 3, respectively. In the same manner as in 27, hollow polymer particles were obtained. The properties of the obtained particles are summarized in Table 4.
- Rhodamine B manufactured by Wako Pure Chemical Industries, Ltd.
- aqueous solution containing 5 mg, 1.4 g of NI PAM
- 8.84 g of GMA was added and heated to 70 ° C. with stirring under a nitrogen atmosphere.
- GMA 2.3 X 10 " 4 molZmol
- a dispersion of particles was obtained by stirring for 1 hour, and the dispersion was washed by centrifugation, and the particle size of the particles was measured by a dynamic light scattering method.
- the diameter was 670 nm, the average particle diameter at 50 ° C. was 600 nm, and it had a temperature-responsive layer of about 35 nm.
- the shell wall thickness of this particle was 20 nm, the particle was red, and was irradiated with visible light near 530 nm under an optical microscope. Green and red fluorescence was emitted (Fig. 14).
- the center of the particle was a hollow polymer particle having a hollow, and the thickness of the shell wall of this particle was lOnm.
- the resulting white hollow polymer particles turned blue when irradiated with ultraviolet light from a mercury lamp. When the ultraviolet light was blocked, the fine particles returned to white, and it was confirmed that the hollow polymer particles exhibited photochromic properties.
- a mixed solution containing 0.013 g of GMA derivative combined with aminobilene and 87 g of GMAO. was added to 20 ml of an aqueous solution containing 0.1 g of NIPAM and heated to 70 ° C. with stirring under a nitrogen atmosphere.
- GMAZNIPAM 5.
- Omol / mol, radical polymerizable coloring compound Z polymerizable monomer 6.0 X 10 _3 molZmol)
- l lmg of KPS was added and stirred at the same temperature for 1 hour. As a result, a dispersion of particles having an average particle diameter of 250 nm and a coefficient of variation of 0.03 was obtained.
- the hollow polymer particles of the present invention utilize the unique light scattering characteristics due to internal pores in the fields of aqueous coating and coating, etc., and have a gloss, opacity, whiteness, etc. on paper, fiber, leather, etc. It can be applied as a light scattering improver for imparting performance and a white pigment. In addition, it can be applied to cosmetic products that utilize light diffusivity, water absorption, and oil absorption by a hollow structure, and can also be used as an ink jet receiving layer.
- it since it has a hollow structure, heat conduction and sound conduction can be suppressed, so it can be used as a heat insulating material or a sound insulation material, and it can also be used as a lightening agent because it can reduce the weight force S in the same volume. Furthermore, it can also be used as a chemical substance holding agent that contains various chemical substances inside, and it is a chemical substance sustained release agent that releases components contained inside by some stimulus such as heat, pressure, and pH change. It can also be used as a DDS material.
- the method for producing hollow polymer particles of the present invention requires a complicated process involving multiple steps.
- the conventional radical polymerization method is not required, and it is possible to supply hollow polymer particles at a low cost for the various uses described above, and it is easy to design the structure according to various applications. Therefore, it is excellent in industrial usefulness.
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Abstract
Description
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CN200780010977XA CN101410425B (zh) | 2006-03-29 | 2007-03-29 | 中空聚合物颗粒、着色中空聚合物颗粒以及它们的制备方法 |
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- 2007-03-29 WO PCT/JP2007/056884 patent/WO2007114259A1/ja active Search and Examination
- 2007-03-29 US US12/294,877 patent/US20110020648A1/en not_active Abandoned
- 2007-03-29 KR KR1020087023177A patent/KR101015131B1/ko active IP Right Grant
- 2007-03-29 EP EP07740322A patent/EP2009033B1/en not_active Revoked
- 2007-03-29 CN CN200780010977XA patent/CN101410425B/zh not_active Expired - Fee Related
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010105840A (ja) * | 2008-10-29 | 2010-05-13 | Dic Corp | カーボン含有金属酸化物中空粒子及びその製造方法 |
JP2011246507A (ja) * | 2010-05-24 | 2011-12-08 | Hymo Corp | 高濃度かつ分離安定性の高い感温性微粒子ゲル分散液およびその製造方法 |
JP5998302B1 (ja) * | 2015-03-18 | 2016-09-28 | 積水化成品工業株式会社 | 有機−無機ハイブリッド中空粒子及びその用途 |
JP2017061664A (ja) * | 2015-03-18 | 2017-03-30 | 積水化成品工業株式会社 | 有機−無機ハイブリッド中空粒子及びその用途 |
JPWO2017163439A1 (ja) * | 2016-03-22 | 2018-11-29 | 積水化成品工業株式会社 | 中空粒子及びその用途 |
TWI848939B (zh) * | 2018-03-14 | 2024-07-21 | 日商積水化成品工業股份有限公司 | 中空粒子分散體及含有中空粒子分散體的塗佈劑 |
Also Published As
Publication number | Publication date |
---|---|
EP2009033A1 (en) | 2008-12-31 |
KR20080103089A (ko) | 2008-11-26 |
TW200745174A (en) | 2007-12-16 |
TWI422597B (zh) | 2014-01-11 |
EP2009033A4 (en) | 2011-06-22 |
CN101410425B (zh) | 2012-07-25 |
US20110020648A1 (en) | 2011-01-27 |
EP2009033B1 (en) | 2013-01-16 |
KR101015131B1 (ko) | 2011-02-16 |
CN101410425A (zh) | 2009-04-15 |
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