WO2000063280A1 - Verfahren zur herstellung von blockförmigen polymethacrylimidschaumstoffen - Google Patents
Verfahren zur herstellung von blockförmigen polymethacrylimidschaumstoffen Download PDFInfo
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- WO2000063280A1 WO2000063280A1 PCT/EP2000/003243 EP0003243W WO0063280A1 WO 2000063280 A1 WO2000063280 A1 WO 2000063280A1 EP 0003243 W EP0003243 W EP 0003243W WO 0063280 A1 WO0063280 A1 WO 0063280A1
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- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0085—Use of fibrous compounding ingredients
-
- 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
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts 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
- C08F220/42—Nitriles
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- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
-
- 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
- C08J2333/00—Characterised by the use of homopolymers or 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/24—Homopolymers or copolymers of amides or imides
Definitions
- the invention relates to a process for the production of polymethacrylimide foams and blocks, plates and the like from such polymethacrylimide foams, and to the molded articles which appear as intermediates from the copolymer of methacrylic acid and methacrylonitrile.
- German Patent No. 1,817,156 already describes a process by which foamable plastics are produced in sheet form by polymerizing mixtures of methacrylonitrile and methacrylic acid between two glass sheets which are sealed with a flexible cord.
- a blowing agent namely formamide or monoalkylformamide, has already been added to the starting mixture. Radical formers are also present, for example as a two-component mixture of tert-butyl perpivalate and benzoyl peroxide.
- the polymerization takes place at temperatures of, for example, 40, 45 or 48 ° C. and takes about 15 to 40 hours.
- the mixture is then heated at about 100 ° C and then heated to 170-300 ° C. At the latter temperatures, cyclization to imide and foaming take place.
- Sheets with a thickness of more than 30 mm cannot be produced by this method, since this repeatedly leads to temperature increases and the heat generated cannot be dissipated quickly enough because the thermal conductivity of the polymerization mixture is relatively poor. Uncontrollable and uncontrollable temperature increases naturally lead to further increased radical formation, so that the reaction easily gets out of control.
- EP 0 356 714 A1 describes a method similar to that described in German Patent No. 1 817 156.
- a radical generator for example Azo-bis-isobutyronitrile used, 0J - 10 wt .-% of electrically conductive particles are added to the mixture to be polymerized.
- the object of the invention is therefore to provide such blocks, in particular in the form of plates, and a method for producing the same, with which a uniform block with thicknesses of up to 80 mm and more can be produced in one, which allows a safe and controlled polymerization process and that works with reduced water and energy requirements and that delivers blocks that produce relatively little waste during assembly. It is also an object of the invention to provide a corresponding method in which the tempering bath, in particular the tempering water bath, can be operated largely at a constant temperature.
- This object is achieved by a process for the production of block-shaped polymethacrylimide foams by copolymerization of methacrylic acid and methacrylonitrile and, if appropriate, further copolymerizable monomers in the presence of radical-forming initiators, postpolymerization and cyclizing the copolymer to polyimide and converting it to a foam, which is characterized in that the copolymerization is carried out in the presence of a mixture comprising at least three initiators with graduated half-lives.
- the subject-matter is thus a method according to the teaching of claim 1. Further advantageous embodiments are described in claims 2 to 7 and correspondingly manufactured blocks in claims 8 to 9. The invention further relates to methods according to claim 10 and polymer plates according to claim 11 and Use according to claim 12.
- Graduated half-life in the context of the invention means that the at least three initiators each have different half-lives at a specific temperature or have the same half-life, but in different temperature ranges. Initiators are preferably used, each of which has a half-life of half an hour in temperature ranges which are at least 10 ° C. apart.
- an initiator mixture which comprises low, medium and high decay, which has a half-life of 1 hour in the ranges 40 to 80, 80 to 110 and 110 to 200 ° C., preferably 110 to 150 ° C.
- Initiator mixtures are preferably used which comprise at least four initiators, each with a half-life of the order of one hour in different temperature ranges.
- the amount of initiator mixture used can be varied within relatively wide limits; the polymerization time can thus be controlled, and the polymerization temperature can also be influenced by the amount of initiators used.
- the used in the invention Quantities are given in parts by weight of initiator per 100 parts by weight of monomers. It is advantageous to use a total amount of initiator mixture of about 0.2 to 0.3 parts by weight per 100 parts by weight of monomers, preferably 0.21 to 0.24 parts by weight.
- the weight ratio of the individual initiators to one another in the initiator mixture can likewise be varied within relatively wide limits; the weight ratio of the individual initiators to one another is preferably in the range from 1: 1 to 1:10, preferably 1: 1 to 1: 4. Suitable quantities and mixing ratios can be determined using simple preliminary tests.
- the invention further relates to foam blocks, in particular foam sheets with a thickness of up to 80 mm, which can be obtained by one of the processes specified above.
- monomer mixtures are first prepared which contain methacrylic acid and methacrylonitrile, preferably in a molar ratio between 2: 3 and 3: 2, as the main constituents.
- other comonomers can be used, such as esters of acrylic or methacrylic acid, styrene, maleic acid or itaconic acid or their anhydrides, vinyl pyrrolidone, etc.
- the proportion of comonomers should not be more than 30% by weight, preferably not more than 10% by weight .-% of the two main components.
- Small amounts of crosslinking monomers, such as ⁇ allyl acrylate can also be used. However, the amounts should preferably be at most 0.05 to 1% by weight.
- the polymerization mixture also contains at least three initiators, each of which has a half-life of the order of one hour in different temperature ranges. It is advantageous if appropriate initiators from at least four temperature ranges are used. Suitable temperature ranges are, for example, 50 to 57 ° C. as the first range, 60 to 80 ° C as the second range, 85 to 105 ° C as the third range and 115 to 125 ° C as the fourth range. A single compound can be used as the initiator from the individual temperature ranges, but it is also possible to use two or more initiators with the corresponding half-lives from the corresponding temperature ranges.
- Suitable initiators which are used according to the invention in a mixture comprising at least three initiators are, as such, initiators which are customarily used, such as are used for the radical formation in free-radically initiated polymerization.
- initiators which are customarily used, such as are used for the radical formation in free-radically initiated polymerization.
- These include compounds such as organic peroxides such as dicumyl peroxide, peroxydicarbonates such as diisopropyl peroxydicarbonate, peresters such as tert-butyl peroxy-2-ethylhexanoate and the like.
- Other types of compounds which can form free radicals are also suitable within the scope of the invention.
- azo compounds such as azo bis (isobutyronitrile) and azo bis (2,4, dimethylvaleronitrile).
- initiator mixtures are particularly suitable, the components of which are selected from the following initiators: azo-bis- (isobutyronitrile), t-butyl peroctoate, t-butyl perbenzoate, t-butyl perpivalate, azo-bis- (2,4-dimethylvaleronitrile), t Butyl perneodecanoate, dibenzoyl peroxide, bis (4-t-butylcyclohexyl) peroxidicarbonate, cumyl peroxy neodecanoate, 1,4-di (2-neodecanoyl peroxy isopropyl) benzene and the like.
- initiators azo-bis- (isobutyronitrile), t-butyl peroctoate, t-butyl perbenzoate, t-butyl perpivalate, azo-bis- (2,4-dimethylvaleronitrile), t Butyl perneodecan
- Suitable initiators can be found in Table 1, for which the temperatures for half-lives for 10 hours, 1 hour and 1 minute are also given, as well as the half-lives in hours for a number of temperatures.
- Table 2 shows the dependency on half-life and temperature. Based on this graphic, initiator mixtures can be compiled in a simple manner.
- Table 3 lists azo compounds which are suitable as initiators in the context of the invention.
- Table 4 shows the half-lives of various azo compounds.
- the half-life of the initiators that can be used is generally already specified by the manufacturer. It can easily be determined analytically, and benzene has generally proven to be suitable as a solvent. The determination is generally carried out with a 0.1 molar solution
- the mixture for the copolymerization also contains blowing agents which either decompose or evaporate at temperatures of about 150 to 250 ° C. and thereby form a gas phase.
- blowing agents which may be mentioned are the nitrogen-containing compounds urea, monomethyl or N, N'-dimethylurea, formamide or monomethylformamide.
- Further nitrogen-free blowing agents are formic acid, water or monohydric aliphatic alcohols, especially those with three to eight carbon atoms.
- the blowing agents are generally used in amounts of 0.5 to 8% by weight, based on the monomers used.
- the polymerization advantageously takes place in block form.
- the monomer mixture is located between two glass plates, each of which is sealed at the edge and forms a kind of flat chamber.
- This flat chamber is surrounded by a water bath, which is set to the desired polymerization temperature.
- the polymerization can be carried out largely or over wide ranges under isothermal conditions, ie at a constant water bath temperature. In many cases it is possible from the beginning to the end of the polymerization Keep water bath temperature constant. Possibly. the water bath temperature can also be kept constant over a long period of time and increased after a certain time in order to carry out part of the polymerization at a higher temperature.
- the water bath temperature can also be kept constant in this next polymerization phase carried out at a higher temperature.
- the selected water bath temperature depends on the thickness of the polymerization chamber and the recipe used in the polymerization. It is generally advantageous to shift the polymerization temperature and thus also the temperature of the water bath to lower values as the thickness of the plate to be produced increases.
- the suitable temperature for recipe and thickness can be optimized by simple preliminary tests.
- the temperature is adjusted to the thickness of the chamber and the formulation so that the heat released during the polymerization can be dissipated to a sufficient extent without undesirable temperatures occurring in the polymerization mixture during the polymerization.
- post-polymerization is carried out in a heating cabinet. Post-polymerization generally takes place at temperatures from 38 to 140 ° C. In general, 10 to 1000 ° C hours are sufficient for the final polymerization in the tempering cabinet.
- the block After completion of the polymerization, the block is heated to a temperature of about 180 to 250 ° C, at which temperature the cyclization to the imide structure and the foaming takes place. Times of 3 to 5 hours are generally sufficient for this thermal aftertreatment.
- the blocks obtained are characterized by a homogeneous, uniform structure.
- Another object of the invention is a process for the production of polymer plates by copolymerization of methacrylic acid and methacrylonitrile and optionally further copolymerizable monomers in the presence of radical-forming initiators and post-polymerization, which is characterized in that the copolymerization in the presence of a mixture comprising at least three initiators with graduated half-lives.
- polymer sheets are produced as an intermediate product in the production of the block-shaped methacrylimide foams according to the invention.
- the invention further relates to polymer plates obtainable by the process specified above.
- the foam blocks produced therefrom can be assembled as such, with very little waste occurring at the edge regions. In this way it is possible to produce moldings of appropriate thickness using only a single block, which previously required several blocks glued together.
- the one-piece foamed blocks or plates preferably have thicknesses of 80 to 300 mm.
- the foam sheets or foam blocks according to the invention are very valuable materials and can be used in particular as components in aircraft construction.
- the polymer blocks produced according to the invention are distinguished by a very uniform structure, they can be stored for as long as desired and, if necessary, can be converted from case to case into foam plates by appropriate heating.
- a mixture of 61 parts of methacrylic acid, 39 parts of methacrylonitrile, 4.7 parts of formamide and 4.2 parts of propanol-2 and an initiator mixture of 0.3 part of t-butyl perpivalate, 0.04 part of t-butyl per-2-ethylhexanoate, 07 parts of t-butyl perbenzoate and 0.077 cumyl perneodecanoate are polymerized between two glass plates, which are 23 mm apart and sealed by a sealing cord, for 66 hours at a water bath temperature of 38 ° C, followed by 24 hours in a heating cabinet at a temperature of Post-polymerized at 115 ° C. Uniform plates are obtained. During the polymerization, which is controlled by the water bath, there are practically no or only slight temperature fluctuations which do not make it necessary to change the water bath temperature.
- the plates obtained can be easily converted into foamed plates by heat treatment at a temperature of 170 to 200 ° C.
- Example 2 The same mixture as in Example 1 is polymerized in a flat chamber with a distance between the glass plates of 30 mm.
- the water bath is 92 hours at 33 ° C, 10 hours at 33 to 38 ° C and 14 hours at 38 ° C held.
- the tempering in the heating cabinet at temperatures of 115 ° C is carried out within 40 hours.
- the panels have a uniform structure and can easily be converted into foamed materials.
- Example 2 The same composition as in Example 1 is polymerized in a flat chamber, the glass plates of which have 50 mm.
- the water bath is kept at 28 ° C for 198 hours, at 28 to 37 ° C for 30 hours and at 37 ° C for 24 hours.
- the post-polymerization is carried out at a temperature of 115 ° C. within 50 hours.
- a polymerization mixture is polymerized which has the following composition: 56 parts methacrylic acid, 44.0 parts methacrylonitrile, 1.0 formamide, 3.3 parts propanol-2, 0.31 parts allyl methacrylate, 0.03 parts t-butyl perpivalate , 0.03 part of t-butyl per-2-ethylhexanoate, 0.1 part of t-butyl perbenzoate and 0.077 part of cumyl pemeodecanoate.
- the polymerization is carried out in flat chambers with a glass plate spacing of 23 mm, 30 mm and 50 mm.
- the polymerization time at 23 mm is 80 hours at 37 ° C and post-polymerization in an oven 32 hours; at a distance of 30 mm 114 hours at 32 ° C, 10 hours at 32 to 38 ° C and 24 hours at 38 ° C and a post-polymerization in a heating cabinet of 45 hours; at a distance of 50 mm, the polymerization time is 198 hours at 27 ° C, 24 hours at 27 to 37 ° C and 24 hours at 37 ° C.
- Post-polymerization in the heating cabinet takes 57 hours. All panels have a uniform structure and can be easily processed into foamed materials.
- ⁇ T means the maximum temperature difference between the water bath and the polymerization mixture during the polymerization.
- DIPND 1,4-di (2-neodecanoylperoxy-isopropyl) benzene
- TBPP t-butyl perpivalate
- the polymer plates obtained in this way have a uniform, uniform structure.
- the temperature within the polymerization mass also remains practically constant.
- the deviations in the polymerisation mass are only a few degrees, maximum 3.4 ° C.
- the temperature is controlled during the polymerization by a thermocouple inserted into the polymerization mass.
- the minor temperature fluctuations are negligible and are far from the temperature fluctuations that can be obtained if you only work with one or two initiators and try to control the reaction with an isothermal water bath. This results in temperature fluctuations of 13 ° C and more, which means that the polymerization becomes uncontrollable and accelerated polymerization occurs and plates are obtained which are either inferior or rejects.
- foams can also be produced which contain electrically conductive particles, in particular carbon particles such as conductive carbon black, e.g. the commercial product Ketjenblack 600EC, manufacturer Akzo Nobel Chemie.
- carbon fibers can also be used as fillers either alone or in addition to other fillers.
- the polymerization solution is also stabilized with 50 ppm quinone.
- a second chamber is filled in the same way, but with dispersion for 45 minutes and evacuation for 40 minutes.
- a third chamber is filled with the same composition, but it is dispersed under vacuum for 25 minutes and further evacuated for 20 minutes. (Please also specify the dimensions of the chamber, in particular the thickness of the plate that is manufactured).
- the polymerization was carried out in all three cases at 34 ° C., which took 73.25 hours. The mixture was then heated for 13 hours at 34 to 60 ° C, 3 hours at 60 ° C, 10 hours at 60 to 100 ° C, 5 hours at 100 to 115 ° C and 3 hours at 115 ° C.
- the polymer plates obtained are of perfect quality. The temperature deviations during the polymerization are negligible.
- V-601 dimethyl 2,2'-azobis- CH, CH, MW230.26 isobutyrate CH, -CN N- C-CH, 3 II 3 COOCH 3 COOCH 3
- V-59 2,2'-Azobis (2-methyl-CH, - ⁇ H 3 MW192.26 butyronitrile) CH, -CH, -CN NC-CH - CH,
- VA-044 2,2'-Azobis N.N'-dimeth-MW 323.27 yleneisobutyramidine dihydrochloride
- VA-061 2,2'-Azobis N, N'-dimeth-M.W. 250.35 yleneisobutyramidine
- VA-086 2,2'-Azobis [2-methyl-N-CH 3 MW288.35 (2-hydroxyethyl) propionC-CN ⁇ ICC amide] HIGH 2 CH NH CH 3 NHCH2CH2OH
- VA-044 White to pale 188 - 193 ° C 44 ° C in water yellow crystals (decomposition) or crystalline powder
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Emergency Medicine (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Polymerization Catalysts (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Graft Or Block Polymers (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE50011821T DE50011821D1 (de) | 1999-04-21 | 2000-04-12 | Verfahren zur herstellung von blockförmigen polymethacrylimidschaumstoffen |
| AT00925205T ATE312136T1 (de) | 1999-04-21 | 2000-04-12 | Verfahren zur herstellung von blockförmigen polymethacrylimidschaumstoffen |
| KR10-2001-7013376A KR100468272B1 (ko) | 1999-04-21 | 2000-04-12 | 블록형 또는 판형 폴리메타크릴이미드 발포 재료의 제조방법, 이러한 방법에 의해 제조된 폴리메타크릴이미드 발포 블록 또는 발포판 및 이를 사용하여 제조한 항공기 제조용 부재 |
| EP00925205A EP1175458B9 (de) | 1999-04-21 | 2000-04-12 | Verfahren zur herstellung von blockförmigen polymethacrylimidschaumstoffen |
| US09/958,929 US6670405B1 (en) | 1999-04-21 | 2000-04-12 | Method for producing block-shaped polymethacrylimide foamed materials |
| JP2000612364A JP5026638B2 (ja) | 1999-04-21 | 2000-04-12 | ブロック形のポリメタクリルイミド発泡材料の製造方法 |
| AU44002/00A AU4400200A (en) | 1999-04-21 | 2000-04-12 | Method for producing block-shaped polymethacrylimide foamed materials |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19917987.5 | 1999-04-21 | ||
| DE19917987A DE19917987A1 (de) | 1999-04-21 | 1999-04-21 | Verfahren zur Herstellung von blockförmigen Polymethacrylimidschaumstoffen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000063280A1 true WO2000063280A1 (de) | 2000-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2000/003243 Ceased WO2000063280A1 (de) | 1999-04-21 | 2000-04-12 | Verfahren zur herstellung von blockförmigen polymethacrylimidschaumstoffen |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6670405B1 (de) |
| EP (1) | EP1175458B9 (de) |
| JP (1) | JP5026638B2 (de) |
| KR (1) | KR100468272B1 (de) |
| AT (1) | ATE312136T1 (de) |
| AU (1) | AU4400200A (de) |
| DE (2) | DE19917987A1 (de) |
| ES (1) | ES2254168T3 (de) |
| TW (1) | TW593517B (de) |
| WO (1) | WO2000063280A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001090454A1 (de) * | 2000-05-25 | 2001-11-29 | Röhm GmbH & Co. KG | Verfahren zur herstellung von synthetischen fäden aus einer auf faserbildenden polymeren basierenden schmelze-mischung |
| WO2003020804A1 (de) * | 2001-08-29 | 2003-03-13 | Röhm GmbH & Co. KG | Verbessertes zur herstellung von polymetharylimidschäumen |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10113899A1 (de) * | 2001-03-21 | 2002-10-02 | Roehm Gmbh | PMI - Sirupphasen und deren Verwendung zur Stabilisierung nicht löslicher Additive |
| DE10212235A1 (de) * | 2002-03-19 | 2003-10-02 | Roehm Gmbh | Polymethacrylimid-Schaumstoffe mit verringerter Porengröße |
| US8722751B2 (en) * | 2003-10-30 | 2014-05-13 | Evonik Rohm Gmbh | Thermostable microporous polymethacrylimide foams |
| EP3393066B1 (de) | 2006-11-01 | 2021-12-01 | LG Electronics Inc. | Verfahren und vorrichtung zur zuweisung von piloten |
| DE102010038716A1 (de) | 2010-07-30 | 2012-02-02 | Evonik Degussa Gmbh | Verfahren zum In-Mold Foaming mit einem schäumbaren Medium und Deckschichten und dadurch erhältlicher Kunststoffformkörper |
| DE102010040286A1 (de) | 2010-08-31 | 2012-03-01 | Evonik Röhm Gmbh | PMI-Schäume mit verbesserten mechanischen Eigenschaften, insbesondere mit erhöhter Reißdehnung |
| CN102167776B (zh) * | 2011-01-06 | 2014-02-05 | 西北工业大学 | Maa/an共聚物泡沫塑料及其制备方法 |
| DE102011002905A1 (de) * | 2011-01-20 | 2012-07-26 | Evonik Röhm Gmbh | Polyacrylimid-Schaumstoffe mit reduziertem Gehalt an Restmonomeren, sowie Verfahren zur Herstellung |
| DE102011085026A1 (de) | 2011-10-21 | 2013-04-25 | Evonik Röhm Gmbh | Verfahren zur Herstellung von Korngrenzenhaftung von expandierten Copolymeren auf Basis von Methacryl- und Acrylverbindungen und Anhaftung diverser Deckschichten auf dem Schaumkern |
| JP5923398B2 (ja) * | 2012-06-29 | 2016-05-24 | 積水化成品工業株式会社 | アクリル系樹脂発泡体及びその製造方法 |
| DE102013205963A1 (de) | 2013-04-04 | 2014-10-09 | Evonik Industries Ag | Verfahren zur kontinuierlichen PMI-Schaumfertigung |
| RU2561972C1 (ru) * | 2014-03-26 | 2015-09-10 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") | Способ производства многослойного пенопласта |
| EP3144344A1 (de) | 2015-09-15 | 2017-03-22 | Evonik Röhm GmbH | Mehrfunktionale alkohole als vernetzer in pmi schaumstoffen |
| CN113045782B (zh) * | 2021-03-04 | 2023-08-04 | 南京精工新材料有限公司 | 一种超高遮光性聚酰亚胺复合薄膜及其制备方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0874019A2 (de) * | 1997-04-25 | 1998-10-28 | Röhm Gmbh | Verfahren zur Herstellung von Polymethacrylimid-Schaumstoffen |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3346060A1 (de) * | 1983-12-21 | 1985-07-04 | Röhm GmbH, 6100 Darmstadt | Flammgeschuetzter polyacryl- oder polymethacrylimidschaumstoff und verfahren zu seiner herstellung |
| JP3259917B2 (ja) * | 1991-11-13 | 2002-02-25 | 株式会社クラレ | アクリル系樹脂成形材料の製造法 |
| DE19606530C2 (de) * | 1996-02-22 | 1998-04-02 | Roehm Gmbh | Verfahren zur Herstellung von Polymethacrylimid-Schaumstoffen mit flammhemmenden Zusätzen und danach hergestellte Schaumstoffe |
-
1999
- 1999-04-21 DE DE19917987A patent/DE19917987A1/de not_active Ceased
-
2000
- 2000-04-12 AT AT00925205T patent/ATE312136T1/de not_active IP Right Cessation
- 2000-04-12 ES ES00925205T patent/ES2254168T3/es not_active Expired - Lifetime
- 2000-04-12 EP EP00925205A patent/EP1175458B9/de not_active Expired - Lifetime
- 2000-04-12 AU AU44002/00A patent/AU4400200A/en not_active Abandoned
- 2000-04-12 JP JP2000612364A patent/JP5026638B2/ja not_active Expired - Lifetime
- 2000-04-12 WO PCT/EP2000/003243 patent/WO2000063280A1/de not_active Ceased
- 2000-04-12 DE DE50011821T patent/DE50011821D1/de not_active Expired - Lifetime
- 2000-04-12 KR KR10-2001-7013376A patent/KR100468272B1/ko not_active Expired - Lifetime
- 2000-04-12 US US09/958,929 patent/US6670405B1/en not_active Expired - Lifetime
- 2000-05-15 TW TW089107556A patent/TW593517B/zh not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0874019A2 (de) * | 1997-04-25 | 1998-10-28 | Röhm Gmbh | Verfahren zur Herstellung von Polymethacrylimid-Schaumstoffen |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001090454A1 (de) * | 2000-05-25 | 2001-11-29 | Röhm GmbH & Co. KG | Verfahren zur herstellung von synthetischen fäden aus einer auf faserbildenden polymeren basierenden schmelze-mischung |
| WO2003020804A1 (de) * | 2001-08-29 | 2003-03-13 | Röhm GmbH & Co. KG | Verbessertes zur herstellung von polymetharylimidschäumen |
| US7169339B2 (en) | 2001-08-29 | 2007-01-30 | Roehm Gmbh & Co. Kg | Method for producing polymethacrylimide foams |
| KR100943399B1 (ko) * | 2001-08-29 | 2010-02-22 | 에보니크 룀 게엠베하 | 폴리메타크릴이미드 발포체의 제조방법 및 당해 방법으로 수득 가능한 폴리메타크릴이미드의 발포 판 또는 시이트 |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2254168T3 (es) | 2006-06-16 |
| EP1175458B1 (de) | 2005-12-07 |
| AU4400200A (en) | 2000-11-02 |
| KR100468272B1 (ko) | 2005-01-27 |
| US6670405B1 (en) | 2003-12-30 |
| TW593517B (en) | 2004-06-21 |
| JP5026638B2 (ja) | 2012-09-12 |
| EP1175458A1 (de) | 2002-01-30 |
| EP1175458B9 (de) | 2006-05-10 |
| DE50011821D1 (de) | 2006-01-12 |
| KR20020005698A (ko) | 2002-01-17 |
| JP2002542356A (ja) | 2002-12-10 |
| ATE312136T1 (de) | 2005-12-15 |
| DE19917987A1 (de) | 2000-10-26 |
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