DE3003476B1 - Process for the production of hardened plastic moldings by casting - Google Patents
Process for the production of hardened plastic moldings by castingInfo
- Publication number
- DE3003476B1 DE3003476B1 DE19803003476 DE3003476A DE3003476B1 DE 3003476 B1 DE3003476 B1 DE 3003476B1 DE 19803003476 DE19803003476 DE 19803003476 DE 3003476 A DE3003476 A DE 3003476A DE 3003476 B1 DE3003476 B1 DE 3003476B1
- Authority
- DE
- Germany
- Prior art keywords
- epoxy resin
- casting
- acid anhydride
- accelerator
- added
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/68—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3412—Insulators
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Epoxy Resins (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Zur Lösung dieser Aufgabe wird bei einem Verfahren der eingangs beschriebenen Art gemäß der Erfindung einerseits eine Säureanhydridhärter-Füllstoff-Masse angesetzt und andererseits wird der Epoxidharzmasse als Beschleuniger ein quaternäres Oniumsalz zugefügt. To solve this problem, the method described at the beginning is used in a method According to the invention, on the one hand, an acid anhydride hardener filler mass is set and on the other hand, the epoxy resin composition becomes a quaternary onium salt as an accelerator added.
Durch die Verwendung eines anderen, an sich bekannten Beschleunigers, der aber bei dem Zweitopfverfahren der Epoxidharz-Masse zugesetzt wird, erhält man den überraschenden Vorteil, daß quaternäre Oniumsalze bei Epoxidverbindungen bei Raumtemperatur und bis zu Temperaturen von 90°C praktisch keine bzw. eine nur sehr geringe ionische Polymerisation bewirken. Dies ermöglicht es, Zwei-Komponenten-Gießharzsysteme mit optimaler Lagerzeit, optimalen Aufarbeitungsbedingungen und äußerst wirtschaftlichen Formbelegungszeiten zu erhalten. Auf diese Weise kann sowohl die Säureanhydridhärter-Füllstoff-Masse als auch die Epoxidharz-Beschleuniger-Masse problemlos aufgearbeitet und bei erhöhter Temperatur gelagert werden. By using another known accelerator, but which is added to the epoxy resin mass in the two-pot process is obtained the surprising advantage that quaternary onium salts with epoxy compounds Room temperature and up to temperatures of 90 ° C practically none or only very little cause low ionic polymerization. This enables two-component cast resin systems with optimal storage time, optimal processing conditions and extremely economical Get mold occupancy times. In this way, both the acid anhydride hardener-filler mass as well as the epoxy resin accelerator mass worked up without any problems and at increased Temperature.
Die Verwendung quaternärer organischer Oniumsalze als latente Katalysatoren bei Epoxidharz-Säureanhydridhärter-Mischungen ist an sich bereits aus der DE-OS 25 05 234 bekannt. Dort sind Ein-Komponenten-Gießharz-Mischungen beschrieben, die sowohl das Epoxidharz als auch den Säureanhydridhärter und den Beschleuniger enthalten und denen außerdem noch zur Verlängerung der Lagerfähigkeit Stabilisatoren, z. B. in Form von Carbonsäure, zugesetzt sind. Würde man dagegen die quaternären Oniumsalze als Beschleuniger bei einem Zwei-Komponenten-Gießharzsystem wie bisher üblich zum Säureanhydridhärter zumischen, so tritt ebenfalls eine Gasbildung auf, welche eine blasenfreie Herstellung von Formkörpern verhindert. The use of quaternary organic onium salts as latent catalysts in the case of epoxy resin-acid anhydride hardener mixtures is in itself already from DE-OS 25 05 234 known. There one-component cast resin mixtures are described that contain both the epoxy resin and the acid anhydride hardener and accelerator and which also have stabilizers to extend the shelf life, e.g. B. in the form of carboxylic acid are added. If you would, however, use the quaternary onium salts as an accelerator in a two-component cast resin system, as has been the case up to now If acid anhydride hardener is mixed in, gas formation also occurs, which is a Prevents bubble-free production of moldings.
Es ist vorteilhaft, daß dem Epoxidharz quaternäre Oniumsalze folgender allgemeiner Strukturformel zugefügt werden, wobei M Atome der 5. Hauptgruppe des Period. Systems bedeuten, insbesondere N und P R1, R2, R3 und R4 gleiche oder verschiedene aliphatische (diese können noch weitere quartäre Atome enthalten), aromatische, heterocyclische oder arylaliphatische Reste bedeuten und in denen 3-Reste gemeinsam oder auch paarweise heterocyclischen Ringen angehören können und Tabelle 1 xe ein Anion, wie Cle, Bre, je, pe, N03e, ClO4... ein organ. Säurerest, wi Acetat,... oder ein komplexes Anion, wie z. B. BF4(3, PF6e, ist, weil diese besonders wirksam sind. Man kann der Epoxidharz-Masse aber auch polymere, quaternäre Oniumsalze zusetzen, wie sie in der DE-OS 2657282 beschrieben sind.It is advantageous that the epoxy resin has quaternary onium salts of the following general structural formula are added, where M atoms of the 5th main group of the period. Systems mean, in particular N and P R1, R2, R3 and R4 identical or different aliphatic (these can also contain further quaternary atoms), aromatic, heterocyclic or arylaliphatic radicals and in which 3 radicals can belong together or in pairs to heterocyclic rings and Table 1 xe an anion, such as Cle, Bre, je, pe, N03e, ClO4 ... an organ. Acid residue, such as acetate, ... or a complex anion, such as. B. BF4 (3, PF6e, because these are particularly effective. You can also add polymeric, quaternary onium salts, as described in DE-OS 2657282, to the epoxy resin composition.
Für das Zweitopf-Gießverfahren gemäß der Erfmdung zum Zusatz zur Epoxidharz-Masse geeignete quaternäre Oniumsalze sind: Benzyl-Dimethylhexadecylammoniumchlorid, Benzyl-Dimethyltetradecylammoniumchlorid, Benzyl-Triäthylammoniumchlorid, Benzyl-Triäthylammoniumbromid, Tetrabutylammoniumchlorid, Tetrabutylammoniumbromid, Tetrabutylammoniumnitrat etc. For the two-pot casting process according to the invention in addition to Quaternary onium salts suitable for epoxy resin compounds are: Benzyl-dimethylhexadecylammonium chloride, Benzyl-dimethyltetradecylammonium chloride, benzyl-triethylammonium chloride, benzyl-triethylammonium bromide, Tetrabutylammonium chloride, tetrabutylammonium bromide, tetrabutylammonium nitrate etc.
Hexadecylpyridiniumchlorid, Hexadecylpyridiniumbromid, Äthyl-Pyridiniumbromid, 1.1'Äthylenbis(pyridiniumbromid) etc 1 -Methyl-3 Dodecylimidazoliumchlorid, 1 -Methyl-3 Dodecylimidazoliumbromid, 1 .2.Dimethyl-3-Benzylimidazoliumchlorid, 1.2.Dimethyl-3-Benzylimidazoliumbromid etc. Hexadecylpyridinium chloride, hexadecylpyridinium bromide, ethyl pyridinium bromide, 1.1'ethylene bis (pyridinium bromide) etc 1 -methyl-3 dodecylimidazolium chloride, 1 -methyl-3 Dodecylimidazolium bromide, 1,2-dimethyl-3-benzylimidazolium chloride, 1,2-dimethyl-3-benzylimidazolium bromide Etc.
Tetraphenyl-Phosphoniumchlorid, Tetraphenyl-Phosphoniumbromid, Tetrabutyl-Phosphoniumchlorid etc. Tetraphenyl phosphonium chloride, tetraphenyl phosphonium bromide, tetrabutyl phosphonium chloride Etc.
Tetraphenylarsoniumchlorid, Triphenylmethylarsoniumbromid etc, wobei die Reaktivität der einzelnen Verbindungen mit zunehmender Anionengröße abnimmt Die der Epoxidharz-Komponente zumischbare Menge des Beschleunigers hängt von dessen spezifischer Wirksamkeit ab und umfaßt den Bereich zwischen 0,05 bis 15 Gew.-Teile bezogen auf die Epoxidharz-Komponente. Der Epoxidharz-Masse können außer den quaternären Oniumsalzen auch Füllstoffe und gegebenenfalls Flexibilisatoren zugefügt sein. Tetraphenylarsonium chloride, triphenylmethylarsonium bromide etc, where the reactivity of the individual compounds decreases with increasing anion size The amount of accelerator that can be admixed with the epoxy resin component depends on this specific effectiveness and comprises the range between 0.05 to 15 parts by weight based on the epoxy resin component. The epoxy resin mass can except the quaternary Onium salts also fillers and optionally flexibilizers may be added.
Die Wirksamkeit der gemäß der Erfindung vorgesehenen Epoxidharz-Beschleuniger-Mischung sei im folgenden anhand der in den Tabellen 1 bis 4 angegebenen Versuchsergebnisse näher erläutert Epoxidharz Beschleuniger Gew.T. Beschleu. Lagerstabilität der Mischungen (in Tagen) Gelierzeit bei auf 100 Gew.T. bei 130 C Epoxidh. The effectiveness of the epoxy resin accelerator mixture provided according to the invention be in the following based on the test results given in Tables 1 to 4 Explained in more detail epoxy resin accelerator parts by weight. Acceleration Storage stability of the mixtures (in days) Gel time at 100 parts by weight. at 130 C epoxy h.
RT 70C (Std 1 15 nicht bestimmt >60 2 2 7,5 bei 90CC nach Probe noch 192 18 Tagen niederviskos abgebrochen Die Tabelle 1 enthält eine Zusammenstellung über die Lagerstabilität der in dünnen Schichten in einem offenen Gefäß gelagerten Mischungen eines charakteristischen Epoxidharzes das mit A bezeichnet ist, nämlich einem Glycidyläther des Bisphenol A mit einem Epoxidäquivalent von 174sir2 und einer Viskosität von 5000+500 mPas bei 25"C, mit den als Beschleuniger dienenden quaternären Verbindungen 1 und 2 Bei diesen handelt es sich um folgende Beschleuniger: 1 Benzyldlmethy!tetradecylammoniumchlorid 2 Tetrabutylammoniumbromid. RT 70C (Std 1 15 not determined> 60 2 2 7.5 at 90CC after sample still canceled for 18 days with low viscosity Table 1 contains a compilation on the storage stability of those stored in thin layers in an open vessel Mixtures of a characteristic epoxy resin denoted by A, namely a glycidyl ether of bisphenol A with an epoxy equivalent of 174sir2 and one Viscosity of 5000 + 500 mPas at 25 "C, with the quaternary accelerators Compounds 1 and 2 These are the following accelerators: 1 Benzyldlmethy / tetradecylammonium chloride 2 tetrabutylammonium bromide.
Man erkennt deutlich die geringe Wirksamkeit dieser Verbindungen bezüglich einer ionischen Polymerisation. One can clearly see the low effectiveness of these compounds with respect to ionic polymerization.
In Tabelle 2 ist das Temperaturverhalten eines Gemisches von 100 Gew.-Teilen des Epoxidharzes A und 12 Gew-Teilen eines Flexibilisators, z. B. ein Polyglykol und 3 Gew.-Teilen des Beschleunigers i in einem wärmeisolierten Gefäß, d. h. unter adiabatischen Bedingungen dargestellt Tabelle 2 Ansatzdauer des Temperatur Gemisches in Stunden in C 0 80,5 0,25 80,2 1,0 79,5 2,0 78,5 3,0 77,5 4 76,5 19,75 62,6 23,25 60,0 Man erkennt die ausgezeichnete Stabilität der Epoxidharz-Beschleuniger-Mischung, aus der sich ergibt, daß praktisch keine ionische Polymerisation auftritt Die Tabelle 3 zeigt den Viskositätsanstieg der gleichen Epoxidharz-Beschleuniger-Mischung wie bei Tabelle 2, wenn diese längere Zeit in einem geschlossenen Erlenmeyerkolben mit Glasstopfen in einem 70"C warmen Trockenschrank aufbewahrt wird. Table 2 shows the temperature behavior of a mixture of 100 Parts by weight of epoxy resin A and 12 parts by weight of a flexibilizer, e.g. B. a Polyglycol and 3 parts by weight of accelerator i in a thermally insulated vessel, d. H. shown under adiabatic conditions Table 2 Preparation time of the temperature Mixture in hours in C 0 80.5 0.25 80.2 1.0 79.5 2.0 78.5 3.0 77.5 4 76.5 19.75 62.6 23.25 60.0 You can see the excellent stability of the epoxy resin accelerator mixture, from which it can be seen that there is practically no ionic polymerization. The table 3 shows the viscosity increase of the same epoxy resin accelerator mixture as at Table 2, if this for a long time in a closed Erlenmeyer flask with Glass stopper is stored in a 70 "C drying cabinet.
Tabelle 3 Ansatzdauer des Viskosität in Gemisches zu Gemische mPas bei 70 C 0 Std. 91,5 1 Std. 91,5 18 Std. 94 24 Std. 97 44 Std. 97 68 Std. 97 8 Tage 156 10 Tage 194 Die Viskosität des Gemisches hat sich also nach einer Lagerzeit von 10 Tagen bei 70"C nur auf das Doppelte erhöht Bei einer mit Füllstoff versetzten Mischung würde der Viskositätsanstieg kaum feststellbar sein. Table 3 Preparation time of the viscosity in mixture to mixtures mPas at 70 C 0 hours 91.5 1 hour 91.5 18 hours 94 24 hours 97 44 hours 97 68 hours 97 8 days 156 10 days 194 The viscosity of the mixture has therefore increased after a storage period only doubled from 10 days at 70 "C for one filled with filler Mixture, the increase in viscosity would hardly be noticeable.
Schließlich wurde in Tabelle 4 noch die Gelierzeit der bisher behandelten Epoxidharz-Beschleuniger-Mischung nach Zugabe der für das Gießharz notwendigen Menge von 100 Gew.-Teilen des Säureanhydridhärters dargestellt Tabelle 4 Temperatur Gelierzeit sofort nach Ansatz der nach Ansatzdauer von nach Ansatz-Mischung 3 Tagen dauer von 8 Tagen 100"C C 30 min 27 min 25 min 120"C 9 min 9 min 8 min 140'C 3 min 3 min 3 min Die Gelierzeit ist also im wesentlichen unabhängig von der Lagerzeit der Epoxidharz-Beschleuniger-Mischung. Es tritt also kein Reaktivitätsverlust des Beschleunigers während der Lagerung auf. Finally, in Table 4, the gelation time of the previously treated one was also shown Epoxy resin accelerator mixture after adding the amount required for the casting resin of 100 parts by weight of the acid anhydride hardener shown Table 4 Temperature gel time immediately after preparation of after preparation duration of 3 days after preparation mixing 8 days 100 "C C 30 min 27 min 25 min 120" C 9 min 9 min 8 min 140'C 3 min 3 min 3 min The gel time is therefore essentially independent of the storage time of the epoxy resin accelerator mixture. There is therefore no loss of reactivity of the accelerator during storage.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803003476 DE3003476B1 (en) | 1980-01-29 | 1980-01-29 | Process for the production of hardened plastic moldings by casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803003476 DE3003476B1 (en) | 1980-01-29 | 1980-01-29 | Process for the production of hardened plastic moldings by casting |
Publications (1)
Publication Number | Publication Date |
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DE3003476B1 true DE3003476B1 (en) | 1981-01-29 |
Family
ID=6093388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE19803003476 Ceased DE3003476B1 (en) | 1980-01-29 | 1980-01-29 | Process for the production of hardened plastic moldings by casting |
Country Status (1)
Country | Link |
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DE (1) | DE3003476B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3223635A1 (en) * | 1982-06-22 | 1983-12-22 | Siemens AG, 1000 Berlin und 8000 München | Process for the production of cured plastic articles by casting |
EP0105488A2 (en) * | 1982-09-30 | 1984-04-18 | Union Carbide Corporation | Curable epoxy resin containing molding compositions |
EP0102916A3 (en) * | 1982-05-13 | 1984-09-05 | Siemens Aktiengesellschaft | Insulating tape based on a thermosetting epoxy resin and an acid anhydride for the impregnation of an insulator for electrical conductors |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3547885A (en) * | 1968-03-08 | 1970-12-15 | Sun Oil Co | Process for curing polyepoxides with anhydrides and phosphonium halide catalysts therefor |
DE2505234A1 (en) * | 1974-02-11 | 1975-08-14 | Westinghouse Electric Corp | RESIN FOR THE INSULATION OF ELECTRICAL PARTS |
DE2405330B2 (en) * | 1973-03-02 | 1976-06-10 | Hoechst Ag, 6000 Frankfurt | PROCESS FOR THE PRODUCTION OF GLYCIDYLESTERS FROM POLYCARBONIC ACIDS |
DE1942836B2 (en) * | 1968-09-30 | 1978-08-31 | Ciba-Geigy Ag, Basel (Schweiz) | Diglycidyl esters of aliphatic dicarboxylic acids, process for their preparation and their use |
DE2533505B2 (en) * | 1974-08-02 | 1981-01-08 | Hoechst Ag, 6000 Frankfurt | Process for the production of low-risk, low-molecular glycidyl ethers of mono- or polyhydric phenols |
-
1980
- 1980-01-29 DE DE19803003476 patent/DE3003476B1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3547885A (en) * | 1968-03-08 | 1970-12-15 | Sun Oil Co | Process for curing polyepoxides with anhydrides and phosphonium halide catalysts therefor |
DE1942836B2 (en) * | 1968-09-30 | 1978-08-31 | Ciba-Geigy Ag, Basel (Schweiz) | Diglycidyl esters of aliphatic dicarboxylic acids, process for their preparation and their use |
DE2405330B2 (en) * | 1973-03-02 | 1976-06-10 | Hoechst Ag, 6000 Frankfurt | PROCESS FOR THE PRODUCTION OF GLYCIDYLESTERS FROM POLYCARBONIC ACIDS |
DE2505234A1 (en) * | 1974-02-11 | 1975-08-14 | Westinghouse Electric Corp | RESIN FOR THE INSULATION OF ELECTRICAL PARTS |
DE2533505B2 (en) * | 1974-08-02 | 1981-01-08 | Hoechst Ag, 6000 Frankfurt | Process for the production of low-risk, low-molecular glycidyl ethers of mono- or polyhydric phenols |
Non-Patent Citations (1)
Title |
---|
Araldit-Gießharzsystem (Veröffentlichung der Ein- sprechenden vom September 1979) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0102916A3 (en) * | 1982-05-13 | 1984-09-05 | Siemens Aktiengesellschaft | Insulating tape based on a thermosetting epoxy resin and an acid anhydride for the impregnation of an insulator for electrical conductors |
DE3223635A1 (en) * | 1982-06-22 | 1983-12-22 | Siemens AG, 1000 Berlin und 8000 München | Process for the production of cured plastic articles by casting |
EP0105488A2 (en) * | 1982-09-30 | 1984-04-18 | Union Carbide Corporation | Curable epoxy resin containing molding compositions |
EP0105488A3 (en) * | 1982-09-30 | 1987-07-22 | Union Carbide Corporation | Curable epoxy resin containing molding compositions |
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8235 | Patent refused |