DE3625709A1 - Process for producing moulded articles from compositions crosslinkable to form organopolysiloxane elastomers - Google Patents
Process for producing moulded articles from compositions crosslinkable to form organopolysiloxane elastomersInfo
- Publication number
- DE3625709A1 DE3625709A1 DE19863625709 DE3625709A DE3625709A1 DE 3625709 A1 DE3625709 A1 DE 3625709A1 DE 19863625709 DE19863625709 DE 19863625709 DE 3625709 A DE3625709 A DE 3625709A DE 3625709 A1 DE3625709 A1 DE 3625709A1
- Authority
- DE
- Germany
- Prior art keywords
- injection molding
- masses
- organopolysiloxane elastomers
- moulded articles
- compositions
- 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
- 238000000034 method Methods 0.000 title claims description 7
- 229920001296 polysiloxane Polymers 0.000 title abstract description 7
- 229920001971 elastomer Polymers 0.000 title abstract description 6
- 239000000806 elastomer Substances 0.000 title abstract description 6
- 239000000203 mixture Substances 0.000 title abstract description 5
- 238000001746 injection moulding Methods 0.000 claims abstract description 16
- 238000000748 compression moulding Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 7
- 238000001721 transfer moulding Methods 0.000 abstract description 4
- 150000002739 metals Chemical class 0.000 description 2
- BOOBDAVNHSOIDB-UHFFFAOYSA-N (2,3-dichlorobenzoyl) 2,3-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC=CC(C(=O)OOC(=O)C=2C(=C(Cl)C=CC=2)Cl)=C1Cl BOOBDAVNHSOIDB-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000001692 EU approved anti-caking agent Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- -1 bis- (tert-butylperoxy) -2,5-dimethylhexene Chemical compound 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Die Herstellung von Formkörpern aus zu Organopolysiloxan elastomeren vernetzbaren Massen durch Formpressen (compression molding), Spritzpressen (transfer molding), Spritzgießen (injection molding) oder Extrudieren ist bereits seit eini ger Zeit bekannt.The production of moldings from organopolysiloxane elastomeric crosslinkable masses by compression molding (compression molding), transfer molding, injection molding (injection molding) or extrusion has been around for a while known for some time.
Hierzu sei z.B. auf W. Lynch "Handbook of Silicone Rubber Fabrication" Van Nostrand Reinhold Com pany, u.a. New York, 1978, Seite 43 bis 90 und Seite 97 bis 118, verwiesen.For this, e.g. on W. Lynch "Handbook of Silicone Rubber Fabrication "Van Nostrand Reinhold Com pany, etc. New York, 1978, pages 43 to 90 and page 97 to 118.
Es bestand nun die Aufgabe, einen Stoff zu finden, aus dem die formgebende Oberfläche der zur Herstellung von Formkör pern aus zu Organopolysiloxanelastomeren vernetzbaren Massen durch Formpressen, Spritzpressen, Spritzgießen oder Extru dieren verwendeten Vorrichtungen besteht, der eine besonders leichte und rasche Entformbarkeit der Formkörper auch ohne Mitverwendung von Trennmitteln ermöglicht und der es ermög licht, daß die formgebenden Teile dieser Vorrichtungen be sonders lange verwendet werden können, bevor sie wegen Ver schleiß ausgewechselt werden müssen. Diese Aufgabe wird durch die Erfindung gelöst.The task now was to find a substance from which the shaping surface of the for the production of molded articles core from masses which can be crosslinked to form organopolysiloxane elastomers by compression molding, injection molding, injection molding or extrusion The devices used exist, which is a special one the moldings can be easily and quickly removed from the mold The use of anti-caking agents also makes it possible light that the shaping parts of these devices be can be used for a particularly long time before they are due to ver wear must be replaced. This task will solved by the invention.
Gegenstand der Erfindung ist ein Verfahren zur Herstellung von Formkörpern aus zu Organopolysiloxanelastomeren ver netzbaren Massen durch Formpressen, Spritzpressen, Spritz gießen oder Extrudieren dadurch gekennzeichnet, daß die in Berührung mit den zu vernetzenden Massen kommende Oberflä che der die endgültige Formgebung der Massen bewirkenden Teile der für das Formpressen, Spritzpressen, Spritzgießen oder Extrudieren verwendeten Vorrichtungen aus Hartmetall besteht.The invention relates to a method for manufacturing from molded articles to organopolysiloxane elastomers wettable masses by compression molding, transfer molding, spraying pour or extrude characterized in that the in Contact with the surfaces to be crosslinked che of the final shaping of the masses Parts for molding, injection molding, injection molding or extrusion used devices made of hard metal consists.
Bei den im Rahmen der Erfindung verwendeten zu Organopolysi loxanen vernetzbaren Massen kann es sich um solche handeln, die durch peroxydische Verbindungen, wie 2,4-Bis-(dichlor benzoyl)-peroxyd, Dibenzoylperoxyd Dicumylperoxyd, 2,5 bis-(tert.-butylperoxy)-2,5-dimethylhexen, Di-tert.-Butyl peroxyd, tert.-Butylperbenzoat, tert. Butylperoxyisopro pylcarbonat oder Isopropylperoxydicarbonat vernetzt werden, oder um solche handeln, die durch Anlagerung von Si-gebun denem Wasserstoff an aliphatische Kohlenstoff-Kohlenstoff- Mehrfachbindung, insbesondere SiC-gebundene Vinylgruppen, vernetzt werden.In the organopolysi used in the context of the invention loxane-crosslinkable masses can be such by peroxidic compounds such as 2,4-bis (dichlor benzoyl) peroxide, dibenzoyl peroxide, dicumyl peroxide, 2.5 bis- (tert-butylperoxy) -2,5-dimethylhexene, di-tert-butyl peroxide, tert-butyl perbenzoate, tert. Butylperoxyisopro pyl carbonate or isopropyl peroxydicarbonate are crosslinked, or are those which are caused by the addition of Si-bundle hydrogen to aliphatic carbon-carbon Multiple bond, in particular SiC-bonded vinyl groups, be networked.
Spritzgießen ist als Verarbeitungsart von zu Organopolysi loxanelastomeren vernetzbaren Massen im Rahmen des erfindungs gemäßen Verfahrens besonders bevorzugt.Injection molding is a type of processing from to Organopolysi Loxane elastomer crosslinkable compositions within the scope of the Invention according to the method particularly preferred.
Die Teile der zur Herstellung von Formkörpern aus zu Orga nopolysiloxanelastomeren vernetzbaren Massen durch Formpres sen, Spritzpressen, Spritzgießen oder Extrudieren verwendeten Vorrichtungen, in denen die endgültige Formgebung erfolgt, sind insbesondere Formnester (cavities) bzw. Düsen von für die Herstellung von Schläuchen oder Profilen verwendeten Ex trudern. Diese Formnester bzw. Düsen können mehr oder weni ger völlig aus Hartmetall bestehen, so daß natürlich auch ihre in Berührung mit den zu vernetzenden Massen kommende Oberfläche aus Hartmetall besteht. Es reicht aber auch aus, wenn nur die in Berührung mit den zu vernetzenden Massen kommende Oberfläche der Formnester bzw. Düsen aus Hartme tall besteht, das als Beschichtung des Inneren der Formne ster bzw. Düsen vorliegt.The parts of the for the production of moldings from Orga nopolysiloxane elastomer crosslinkable masses by molding sen, injection molding, injection molding or extrusion Devices in which the final shaping takes place are especially cavities or nozzles from for the production of hoses or profiles used Ex fling. These mold cavities or nozzles can more or less ger completely made of hard metal, so of course their coming into contact with the masses to be networked Surface made of hard metal. But it’s also enough if only in contact with the masses to be networked coming surface of the mold cavities or nozzles made of Hartme tall, which is a coating on the inside of the mold ster or nozzles is present.
Hartmetalle sind in "Ullmanns Encyklopädie der technischen Chemie" 4. Auflage Band 12, Verlag Chemie, Weinheim, New York (1976) Seite 515 bis 521, beschrieben. Bei dem er findungsgemäßen Verfahren sind als Hartmetalle die G-Sorten, insbesondere G20, das aus 88 Gewichtsprozent WC und 12 Ge wichtsprozent Co besteht und eine Dichte von 14,2 g/cm3 auf weist, bevorzugt.Hard metals are described in "Ullmann's Encyclopedia of Industrial Chemistry" 4th edition volume 12, Verlag Chemie, Weinheim, New York (1976) pages 515 to 521. In the method according to the invention, the G types, in particular G20, which consists of 88 percent by weight WC and 12 percent by weight Co and have a density of 14.2 g / cm 3 , are preferred as hard metals.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863625709 DE3625709A1 (en) | 1986-07-30 | 1986-07-30 | Process for producing moulded articles from compositions crosslinkable to form organopolysiloxane elastomers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863625709 DE3625709A1 (en) | 1986-07-30 | 1986-07-30 | Process for producing moulded articles from compositions crosslinkable to form organopolysiloxane elastomers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3625709A1 true DE3625709A1 (en) | 1988-02-04 |
Family
ID=6306268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19863625709 Ceased DE3625709A1 (en) | 1986-07-30 | 1986-07-30 | Process for producing moulded articles from compositions crosslinkable to form organopolysiloxane elastomers |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3625709A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2284175A (en) * | 1993-11-26 | 1995-05-31 | Sumitomo Rubber Ind | Mould having good releasability |
| EP1068067A1 (en) * | 1998-03-31 | 2001-01-17 | Physical Optics Corporation | Method of making replicas while preserving master |
| NL1032865C2 (en) * | 2006-10-03 | 2008-04-04 | Czl Tilburg B V | Injection molding tool for producing e.g. lenses or CD's, includes wear resistant hard metal layer applied by shockwave cladding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD92789A (en) * |
-
1986
- 1986-07-30 DE DE19863625709 patent/DE3625709A1/en not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD92789A (en) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2284175A (en) * | 1993-11-26 | 1995-05-31 | Sumitomo Rubber Ind | Mould having good releasability |
| EP1068067A1 (en) * | 1998-03-31 | 2001-01-17 | Physical Optics Corporation | Method of making replicas while preserving master |
| EP1068067A4 (en) * | 1998-03-31 | 2001-08-16 | Physical Optics Corp | Method of making replicas while preserving master |
| NL1032865C2 (en) * | 2006-10-03 | 2008-04-04 | Czl Tilburg B V | Injection molding tool for producing e.g. lenses or CD's, includes wear resistant hard metal layer applied by shockwave cladding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8131 | Rejection |