WO2002024755A1 - Polystyrolmikrokugeln und verfahren zur herstellung - Google Patents
Polystyrolmikrokugeln und verfahren zur herstellung Download PDFInfo
- Publication number
- WO2002024755A1 WO2002024755A1 PCT/EP2001/010586 EP0110586W WO0224755A1 WO 2002024755 A1 WO2002024755 A1 WO 2002024755A1 EP 0110586 W EP0110586 W EP 0110586W WO 0224755 A1 WO0224755 A1 WO 0224755A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cyclic
- microspheres
- solution
- tert
- styrene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
-
- 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]
-
- 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.]
- Y10T428/2989—Microcapsule with solid core [includes liposome]
Definitions
- the present invention relates to microspheres with a narrow grain size distribution and a uniform spherical shape, consisting of partially or completely crosslinked polymer material.
- the invention also relates to a method for producing these microspheres and their use.
- microspheres made of polymer materials in particular polystyrene, which are required for a wide variety of technical fields of application, have mainly been produced in emulsion polymerization processes.
- This mixture is stirred at a fixed number of revolutions, an emulsion (o / w) being formed, consisting of organic styrene / divinylbenzene beads in the aqueous solution.
- the polymerization catalyst presented in the aqueous solution is often potassium peroxodisulfate.
- the polymerization catalyst can also be added to the styrene / divinylbenzene mixture. In this case, dibenzoyl peroxide is very often used as a radical generator.
- the polystyrene microspheres produced by the previously known processes have a very wide particle size distribution and often a very uneven shape.
- the formation of a uniform and narrow grain size distribution in the stirred emulsion is prevented by the continuous new and reforming of the beads.
- a variation of the composition and a prepolymerization to achieve changed properties and more suitable properties for a desired technical application is difficult with the emulsion polymerization process.
- the formation of an outer protective colloid or a protective shell during the polymerization is only possible in the form that inorganic compounds such as magnesium chloride, phosphates, bentonites or the like are added to the aqueous solution. An agglomeration is thereby limited, but an optical control and control of the ball formation and the polymerization is no longer given.
- microspheres with an inner spherical core, which contains one or more monomer (s), crosslinking agent, additives and peroxide, and outer spherical shell, which consists of a chemically hardened protective colloid, and by a process for producing microspheres from polymer materials With a narrow particle size distribution in the range from 50 to 2000 ⁇ m and a uniform spherical shape, by a) droplets emerging from an inner nozzle made of a reactive mixture containing one or more polymerizable monomer (s) with a liquid to viscous, flowable consistency b) with a a coaxially arranged outer nozzle emerging separating and protective liquid and c) are dropped under suitable conditions into a hardening solution, under which the spherical shape formed during the fall is retained, d) the outer protective sheath cures under the influence of the hardener solution, e) the mixture containing one or more monomers (e) is polymerized and hardened in spherical form after
- Solutions of the present invention are also provided by special configurations of the method according to the invention, which are the subject of claims 4 to 16. Furthermore, the use of the microspheres produced according to claims 17 to 20, for example as carrier materials for ion exchangers or for reactive molecular groups or in combinatorial synthesis, is also an object of the invention.
- the microspheres according to the invention are produced from partially or completely crosslinked polymer material in the particle size range between 50 ⁇ m and 2,000 ⁇ m by forming drops from a reaction liquid mixture emitting from at least one nozzle.
- the nozzle which emits the reaction liquid is surrounded by a coaxially arranged outer nozzle, a so-called annular gap nozzle, through which a separating and protective liquid is added.
- This liquid envelops the formed drops of the reaction liquid containing one or more polymerizable monomer (s) when dropped into a hardening solution.
- the hardening solution causes the outer protective sheath to harden and prevents agglomeration of the formed drops of the monomer-containing reaction liquid.
- the polymer material is changed by chemical derivatization such that reactive groups of molecules are obtained for further chemical reactions.
- the problem is solved according to the invention in that the starting solution of the monomer or monomers with a suitable crosslinking molecule, a catalyst for the polymerization, which provides the radicals necessary for the polymerization at slightly or greatly increased temperature, and additives which have the necessary chemical properties of the Create polymerized and cross-linked polymers for use in combinatorial synthesis.
- polymerizable monomers are styrene, derivatives of styrene, unsaturated olefins, such as butadiene, pentadiene, vinyl, (meth) acrylic compounds, cyclic ethers, cyclic esters, cyclic amides, such as oxiranes, lactones or lactams, unsaturated cyclic hydrocarbons, cyclic Isocyanates, cyclic H-acidic amino compounds, cyclic hydroxy or carboxy compounds can be used in the presence of suitable additives and catalysts.
- These monomers can be used individually or in a mixture in the process according to the invention. The more detailed embodiment of the invention is described below using the example of styrene, it being readily possible for the person skilled in the art to modify and adapt it to the use of other suitable monomers.
- a starting solution consisting of a polymerizable mixture, such as. B. styrene, derivatives of styrene, such as 4-bromostyrene or suitable acrylic acid derivatives, a crosslinker compound (z. B. di-vinylbenzene, diethylene glycol bis (allyl carbonate), di-allyl phthalate, methyl styrene, methyl acrylate, methyl methacrylate, hydroxyethyl methacrylate, 1, 4-butanediol dimethacrylate, trimethylolpropane trimethacrylate and other di-, tri-vinyl compounds, as well as di-, tri- and tetraacrylates or methacrylates), a radical agent, usually an organic peroxide compound (e.g.
- an outer nozzle in the form of an annular gap nozzle, through which a protective colloid solution is pressed.
- the oscillation with a frequency of 20 Hz to 10,000 Hz forms microspheres which contain spherical cores, which contain styrene, crosslinking agent and peroxide, and outer spherical shells, which consist of the protective colloid solution.
- these microspheres consisting of core and shell are transferred to a reaction solution in which the outer shell is chemically hardened.
- the capsules then formed which contain styrene, crosslinking agent and peroxide, are subjected to an increase in temperature in order to initiate or accelerate the polymerization reaction of styrene and the crosslinking.
- the protective layer is removed by chemical reaction or by washing with gentle stirring.
- the polymerization time can be shortened by suitable accelerators (e.g. N, N-dimethylaniline, N, N-dimethyl-o-toluidine, N, N-diethylaniline, co-octoate, Cu-octoate or other accelerator compounds) or shifted to lower temperatures.
- suitable accelerators e.g. N, N-dimethylaniline, N, N-dimethyl-o-toluidine, N, N-diethylaniline, co-octoate, Cu-octoate or other accelerator compounds
- a further control of the polymerization is that suitable inhibitors (for example hydroquinone, p-benzoquinone, pyrocatechol, tert-butyl hydroquinone, 4-tert-butyl pyrocatechol, 3,5-di-tert-butyl pyrocatechol, 2,5-di-tert -Butylhydroquinone, hydroquinone monomethyl ether or other radical scavengers) are added to the starting solution to increase the gelation time, ie the time until the beginning of the polymerization to vary and to be able to suitably adjust the procedure for the deformation into microspheres.
- suitable inhibitors for example hydroquinone, p-benzoquinone, pyrocatechol, tert-butyl hydroquinone, 4-tert-butyl pyrocatechol, 3,5-di-tert-butyl pyrocatechol, 2,5-di-tert -Butylhydroquinone, hydroquinon
- a further development of the invention consists in that the freshly prepared mixture of styrene, crosslinking agent and catalyst is partly prepolymerized until a viscosity which can still be dropped is not exceeded. This can be done in a water bath or air circulating oven at temperatures of 30 - 60 ° C for a period of 1 - 24 hours.
- the prepolymerization depends on the composition of the starting mixture and the type of crosslinking substances, the polymerization catalysts, the inhibitors and the other additives.
- microspheres according to the invention can be produced by processes which correspond to the process described in detail in the patents DE 41 25 133 C2 and EP 0 735 940 B1. It is a vibration dropletization process in which a liquid mixture containing styrene or a viscous mixture which is already partly polymerized is dripped by vibration excitation of the nozzle device. This dropletization process has the advantage that a monodisperse distribution of the spherical particles formed is obtained. By using a coaxial double nozzle, ie an inner nozzle with an outer annular gap nozzle surrounding it, a spherical formation of the inner polystyrene ball and the outer protective colloid ball shell is inevitably given.
- the desired spherical shape of the drops forms during the fall, which remains in the hardening liquid during the hardening of the protective cover and the subsequent polymerization.
- the drop distance of the drops is oriented such that the drops enter the hardener liquid tangentially or approximately tangentially or at least at an acute angle to the liquid surface.
- the fall distance is variable and set so that the drops due to the Surface tension of the liquid or viscous mixture can form a spherical geometry in the time of free fall.
- the additives added to the solution play a decisive role in the properties of the polystyrene beads formed.
- substances with a lipophilic and a hydrophilic part of the molecule are added to the starting solution.
- the lipophilic part of the molecule is integrated into the polymer structure of the polystyrene, while the hydrophilic part of the molecule diffuses more to the surface of the polystyrene balls and can serve as a docking part of the molecule for further chemical reactions.
- a further embodiment of the invention consists in adding these grafted-on molecules to the protective colloid, so that during the already started polymerization, the grafted-on molecules can only be bound to the surface of the polymeric core.
- Alginates are particularly suitable for the outer protective colloid shell, ie sodium or ammonium alginates in aqueous solution are used for the solution. In the aqueous solution, which contains divalent or trivalent ions, these are converted into poorly soluble metal alginates.
- the metal ion solution also contains a nonionic surfactant and / or an alcohol such as ethanol, propanol or butanol.
- the present invention is further developed in such a way that the hardening solution for the alginate does not contain divalent or trivalent metal salts, but is adjusted to a pH of 4-5 with organic acids such as citric or tartaric acid.
- organic acids such as citric or tartaric acid.
- the sodium or ammonium alginate of the protective shell is converted to alginic acid, which is sparingly soluble and thus gives the protective capsule a sufficiently high strength to allow the styrene / crosslinking agent to harden without disruption.
- the detachment of the Me 2 + / 3 + alginate protective cover is effected by complexing agents which have a far higher complex formation constant than the alginate molecule.
- Complexing agents such as ethylenediamine acetic acid, nitrilotriacetic acid or their alkali metal salts and / or mixtures of these complexing agents are used for this.
- the Me2 + / 3 + alginate protective sheaths of the polystyrene microspheres are dissolved in alkaline aqueous solution in such a way that the Me 2 + / 3 + ions are complexed by the chelating agent and the soluble alkali salt of the alginate is formed again.
- the polystyrene microspheres can thus be separated from the solution by filtration / sieving, washed and dried.
- styrene microspheres can be elegantly produced using this method.
- other polymerizable monomers such as derivatives of styrene, unsaturated olefins, such as butadiene, pentadiene, vinyl, (meth) acrylic compounds, cyclic ethers, cyclic esters, cyclic amides, such as oxiranes, lactones, can also be used in this way or lactams, unsaturated cyclic hydrocarbons, cyclic isocyanates, cyclic H-acidic amino compounds, cyclic hydroxy or carboxy compounds react individually or in a mixture to form polymer microspheres.
- microspheres can be used in combinatorial synthesis, as carrier materials for ion exchangers, as carrier material for polymer-assisted liquid phase syntheses, generally as carrier materials for reactive molecular groups or as carrier material for oligonucleotide synthesis. However, they can also be used in solid phase synthesis.
- the inner casting solution and. the outer casting solution was fed under slight overpressure to a coaxial double nozzle with an inside diameter of 100 ⁇ m and an outside diameter of 600 ⁇ m and vibration-dripped under a frequency of 3000 Hz.
- the core-shell microspheres obtained were fed to the hardening solution after the nozzle, where the shells of the capsules were hardened. After a curing time of 1 hour, the microspheres were washed with water and heat treated at 60 ° C for 24 hours.
- the inner styrene mixture ball which was still liquid after shell hardening, was then fully polymerized.
- the outer protective shell made of Na alginate was dissolved with a 10% nitrilotriacetic acid solution.
- the polystyrene microspheres obtained were separated from the nitrilotriacetic acid solution, washed with water and dried. Microspheres of partially cross-linked polystyrene with a diameter of 150 ⁇ 25 ⁇ m were obtained.
- Example 2 The procedure was as in Example 1, except that the inner solution was prepolymerized at 280 ° C. for 16 hours and then, as in Example 1, cast with an outer nozzle (diameter 150 ⁇ m) and an outer nozzle (diameter 800 ⁇ m).
- polystyrene microspheres with diameters of 240 ⁇ 20 ⁇ m were obtained.
- Example 1 The inner solution of Example 1 was varied by using the free radical generator methyl ethyl ketone peroxide in a concentration of 9.5%. 1.0% N, N-diethylaniline was used as the accelerator. The prepolymerization was carried out at 44 ° C. over a period of 12 hours.
- the vibration dropletization was carried out with a coaxial double nozzle with an inner diameter of 120 ⁇ m and an outer diameter of 100 ⁇ m.
- microspheres made of polystyrene cross-linked with methyl methacrylate and divinylbenzene. The diameters were 160 + 20 ⁇ m.
- the inner solution had the same composition as in Example 4, but the methyl methacrylate content was 1.8% and the divinylbenzene content was 0%.
- Polystyrene-methylhmethacrylate microspheres with a diameter of 145 ⁇ 30 ⁇ m were obtained.
- Example 5 2.4% butyl methacrylate and 6% dibenzene peroxide were added to the inner solution of Example 5 as a crosslinker, with the composition being otherwise the same.
- This inner solution was prepolymerized at 40 ° C. for 19 hours and then shaped using the double nozzle process. The result was polystyrene-butyl methacrylate microspheres with a diameter of 155 + 20 ⁇ m.
- An inner casting solution was prepared as in Example 1. An electrolyte content of 3.5% NaCl was added to the outer casting solution.
- Example 2 The two solutions were cast as in Example 1. The result was polystyrene microspheres with a more uniform particle size distribution and a somewhat higher level of skill. Part of the hardened polystyrene microspheres was freed from the protective cover after hardening with an alkaline ethylenediaminetetraacetic acid solution. This complexing agent also leads to a conversion of the Ca alginate into soluble Na alginate in the alkaline range.
- Example 9 The inner casting solution of Example 1 was used as crosslinking monomer instead of divinylbenzene, triacrylcyanurate as a monomer with three unsaturated reactive groups for crosslinking. Cross-linked polystyrene microspheres with more rigid properties resulted.
- Ditrimethylolpropetraetraacrylate was added to the inner casting solution of Example 1 as a crosslinking agent.
- the polystyroimicrospheres obtained were very strongly cross-linked by the four-fold unsaturated cross-linking molecule.
- Example 1 The inner casting solution of Example 1 was replaced with a temporary system instead of a binary system, i.e. in addition to the styrene provided with two other crosslinkers. Diallyl phthalate and methyl methacrylate were used.
- the polystyroimicrospheres obtained consisted of an interpenetrating network of the three components.
- the inner casting solution from Example 1 was additionally added pentaerythritol diallyl ether.
- the two reactive double bonds of this monomer participated in the polymerization part, i.e. were networked with.
- the free terminal OH groups can be used directly for the grafting of molecules for combinatorial synthesis or other chemical reactions, while the remaining molecule of the pentaerythritol diallyl ether is crosslinked with the styrene.
- the inner casting solution consisted of styrene, 10% maleic anhydride and 5% 6-aminohexanoic acid.
- the polymerization carried out after the casting and the formation of alginate-encapsulated styrene / maleic acid / amino acid was carried out at 75 ° C. for 48 hours.
- the protective capsule was also detached from Ca alginate using an alkaline complexing agent as in Example 1.
- the polystyrene-maleic acid copolymers obtained contained grafted-in amino acid.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002529163A JP2004525990A (ja) | 2000-09-21 | 2001-09-13 | ポリスチレンのミクロスフェアとその製造方法 |
| AU2002218174A AU2002218174A1 (en) | 2000-09-21 | 2001-09-13 | Polystyrene microspheres and a method for their production |
| KR10-2003-7003845A KR20030051653A (ko) | 2000-09-21 | 2001-09-13 | 폴리스티렌 마이크로비이드 및 그것의 제조 방법 |
| US10/381,136 US20040012105A1 (en) | 2000-09-21 | 2001-09-13 | Polystyrene microspheres and a method for their production |
| EP01985259A EP1319026A1 (de) | 2000-09-21 | 2001-09-13 | Polystyrolmikrokugeln und verfahren zur herstellung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10046755.5 | 2000-09-21 | ||
| DE10046755 | 2000-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002024755A1 true WO2002024755A1 (de) | 2002-03-28 |
Family
ID=7657077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2001/010586 Ceased WO2002024755A1 (de) | 2000-09-21 | 2001-09-13 | Polystyrolmikrokugeln und verfahren zur herstellung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20040012105A1 (de) |
| EP (1) | EP1319026A1 (de) |
| JP (1) | JP2004525990A (de) |
| KR (1) | KR20030051653A (de) |
| AU (1) | AU2002218174A1 (de) |
| WO (1) | WO2002024755A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011051033A2 (de) | 2009-10-30 | 2011-05-05 | Evonik Röhm Gmbh | Verkapselung von reaktivkomponenten für 1-k-systeme unter verwendung von koaxialdüsen |
| US8653004B2 (en) | 2007-08-02 | 2014-02-18 | Basf Se | Actives-comprising polymer networks, processes for producing them, and their use |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008522311A (ja) * | 2004-12-01 | 2008-06-26 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | コンテンツアイテムの関連付けに基づく自動的なコンテンツ整理 |
| US8012533B2 (en) * | 2005-02-04 | 2011-09-06 | Oxane Materials, Inc. | Composition and method for making a proppant |
| US7491444B2 (en) * | 2005-02-04 | 2009-02-17 | Oxane Materials, Inc. | Composition and method for making a proppant |
| EA012634B1 (ru) | 2005-02-04 | 2009-12-30 | Оксан Материалз, Инк. | Композиция и способ получения проппанта |
| US7867613B2 (en) * | 2005-02-04 | 2011-01-11 | Oxane Materials, Inc. | Composition and method for making a proppant |
| ATE501178T1 (de) * | 2006-10-05 | 2011-03-15 | Basf Se | Verfahren zur herstellung wasserabsorbierender polymerpartikel durch polymerisation von tropfen einer monomerlösung |
| US20100143432A1 (en) * | 2007-05-22 | 2010-06-10 | Basf Se | Method for Protecting Wood Stacks from Infestation by Wood Pests |
| US8047288B2 (en) | 2007-07-18 | 2011-11-01 | Oxane Materials, Inc. | Proppants with carbide and/or nitride phases |
| WO2010086433A1 (de) * | 2009-02-02 | 2010-08-05 | Basf Se | Verfahren zur herstellung von polymeren sowie reaktor zur durchführung des verfahrens |
| MY162476A (en) | 2009-12-22 | 2017-06-15 | Halliburton Energy Services Inc | A proppant having a glass-ceramic material |
| WO2011082102A1 (en) | 2009-12-31 | 2011-07-07 | Oxane Materials, Inc. | Ceramic particles with controlled pore and/or microsphere placement and/or size and method of making same |
| US9670763B2 (en) | 2010-01-29 | 2017-06-06 | Halliburton Energy Services, Inc. | Self-toughened high-strength proppant and methods of making same |
| WO2013010050A2 (en) | 2011-07-13 | 2013-01-17 | Oxane Materials, Inc. | Low surface friction proppants |
| CN102504793B (zh) * | 2011-10-10 | 2013-03-13 | 西南石油大学 | 一种核壳型聚合物微球调驱剂及制备方法 |
| US20150250203A1 (en) * | 2012-01-26 | 2015-09-10 | Wikifoods, Inc. | Enclosing materials in natural transport systems |
| CN102627718A (zh) * | 2012-03-27 | 2012-08-08 | 郑州大学 | 10~100微米交联聚苯乙烯微球的制备方法 |
| CN103044616B (zh) * | 2013-01-19 | 2015-06-17 | 桂林理工大学 | 一种松香基羧基化聚合物微球的制备方法 |
| CN103073090A (zh) * | 2013-02-17 | 2013-05-01 | 桂林理工大学 | 利用羧基化松香基聚合物微球去除废水中亚甲基蓝的方法 |
| CN104525066B (zh) * | 2015-01-09 | 2016-06-01 | 福州大学 | 一种单分散固结胶束微粒的制备方法 |
| CN112708034B (zh) * | 2019-10-24 | 2022-11-18 | 中国石油化工股份有限公司 | 包含α-甲基苯乙烯聚合物的复合物微球及其制备方法与应用 |
| EP4114549A4 (de) * | 2020-03-02 | 2024-08-07 | Millennial Materials and Devices Inc. | Verfahren zur herstellung von kohlenstoffperlen |
| CN112573885A (zh) * | 2020-12-12 | 2021-03-30 | 南京霄祥工程技术有限公司 | 一种自流平砂浆及其制备方法 |
| CN113512152B (zh) * | 2021-06-09 | 2022-05-10 | 深圳普门科技股份有限公司 | 乙烯基单体-多乙烯基交联剂共聚物无孔微球及其制备方法和应用 |
| CN113637114A (zh) * | 2021-08-18 | 2021-11-12 | 宁波锋成先进能源材料研究院有限公司 | 一种纳米调驱剂及其制备方法和应用 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0046535A2 (de) * | 1980-08-22 | 1982-03-03 | Bayer Ag | Verfahren zur Herstellung von Perlpolymerisaten einheitlicher Teilchengrösse |
-
2001
- 2001-09-13 AU AU2002218174A patent/AU2002218174A1/en not_active Abandoned
- 2001-09-13 KR KR10-2003-7003845A patent/KR20030051653A/ko not_active Withdrawn
- 2001-09-13 EP EP01985259A patent/EP1319026A1/de not_active Withdrawn
- 2001-09-13 WO PCT/EP2001/010586 patent/WO2002024755A1/de not_active Ceased
- 2001-09-13 JP JP2002529163A patent/JP2004525990A/ja active Pending
- 2001-09-13 US US10/381,136 patent/US20040012105A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0046535A2 (de) * | 1980-08-22 | 1982-03-03 | Bayer Ag | Verfahren zur Herstellung von Perlpolymerisaten einheitlicher Teilchengrösse |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8653004B2 (en) | 2007-08-02 | 2014-02-18 | Basf Se | Actives-comprising polymer networks, processes for producing them, and their use |
| WO2011051033A2 (de) | 2009-10-30 | 2011-05-05 | Evonik Röhm Gmbh | Verkapselung von reaktivkomponenten für 1-k-systeme unter verwendung von koaxialdüsen |
| DE102009046244A1 (de) | 2009-10-30 | 2011-05-19 | Evonik Röhm Gmbh | Verkapselung von Reaktivkomponenten für 1-K-Systeme unter Verwendung von Koaxialdüsen |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004525990A (ja) | 2004-08-26 |
| KR20030051653A (ko) | 2003-06-25 |
| EP1319026A1 (de) | 2003-06-18 |
| US20040012105A1 (en) | 2004-01-22 |
| AU2002218174A1 (en) | 2002-04-02 |
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