DE4123737A1 - Pressed gaskets with increased tensile strength - contain poly:aromatic amide] fibre pulp and are prepd. by calendering the fibres being added as masterbatch contg. reinforcing filler and elastomer - Google Patents
Pressed gaskets with increased tensile strength - contain poly:aromatic amide] fibre pulp and are prepd. by calendering the fibres being added as masterbatch contg. reinforcing filler and elastomerInfo
- Publication number
- DE4123737A1 DE4123737A1 DE4123737A DE4123737A DE4123737A1 DE 4123737 A1 DE4123737 A1 DE 4123737A1 DE 4123737 A DE4123737 A DE 4123737A DE 4123737 A DE4123737 A DE 4123737A DE 4123737 A1 DE4123737 A1 DE 4123737A1
- Authority
- DE
- Germany
- Prior art keywords
- elastomer
- rubber
- pulp
- masterbatch
- reinforcing filler
- 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.)
- Withdrawn
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 23
- 239000000806 elastomer Substances 0.000 title claims abstract description 22
- 239000004594 Masterbatch (MB) Substances 0.000 title claims abstract description 17
- 239000000835 fiber Substances 0.000 title claims abstract description 14
- 239000012763 reinforcing filler Substances 0.000 title claims abstract 4
- 238000003490 calendering Methods 0.000 title description 5
- 150000008430 aromatic amides Chemical class 0.000 title 1
- 239000000945 filler Substances 0.000 claims abstract description 12
- 230000009975 flexible effect Effects 0.000 claims abstract description 10
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 5
- 239000000454 talc Substances 0.000 claims abstract description 4
- 229910052623 talc Inorganic materials 0.000 claims abstract description 4
- -1 poly(p-phenylene terephthalamide) Polymers 0.000 claims abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract 3
- 239000005995 Aluminium silicate Substances 0.000 claims abstract 2
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract 2
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract 2
- 229920005549 butyl rubber Polymers 0.000 claims abstract 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract 2
- 229920003052 natural elastomer Polymers 0.000 claims abstract 2
- 229920001194 natural rubber Polymers 0.000 claims abstract 2
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract 2
- 229920003366 poly(p-phenylene terephthalamide) Polymers 0.000 claims abstract 2
- 229920001195 polyisoprene Polymers 0.000 claims abstract 2
- 239000004760 aramid Substances 0.000 claims description 20
- 229920003235 aromatic polyamide Polymers 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000005062 Polybutadiene Substances 0.000 claims description 4
- 150000002825 nitriles Chemical class 0.000 claims description 4
- 229920002857 polybutadiene Polymers 0.000 claims description 4
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 2
- 239000005977 Ethylene Substances 0.000 claims 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims 1
- JZMZZQIVTBNPPP-UHFFFAOYSA-N NC(=O)C1=CC=CC=C1C(=O)N1C2=CC=C1C=C2 Chemical compound NC(=O)C1=CC=CC=C1C(=O)N1C2=CC=C1C=C2 JZMZZQIVTBNPPP-UHFFFAOYSA-N 0.000 claims 1
- 229920000800 acrylic rubber Polymers 0.000 claims 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims 1
- 229920003244 diene elastomer Polymers 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 229920002681 hypalon Polymers 0.000 claims 1
- 229920000058 polyacrylate Polymers 0.000 claims 1
- 239000004071 soot Substances 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 150000001408 amides Chemical class 0.000 abstract 2
- 229920006229 ethylene acrylic elastomer Polymers 0.000 abstract 1
- 229920001973 fluoroelastomer Polymers 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000005060 rubber Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229920003048 styrene butadiene rubber Polymers 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920000271 Kevlar® Polymers 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000004848 polyfunctional curative Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920013646 Hycar Polymers 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000287531 Psittacidae Species 0.000 description 1
- UZHDGDDPOPDJGM-UHFFFAOYSA-N Stigmatellin A Natural products COC1=CC(OC)=C2C(=O)C(C)=C(CCC(C)C(OC)C(C)C(C=CC=CC(C)=CC)OC)OC2=C1O UZHDGDDPOPDJGM-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1025—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by non-chemical features of one or more of its constituents
- C09K3/1028—Fibres
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/005—Processes for mixing polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0204—Elements
- C09K2200/0208—Carbon
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
- C09K2200/0247—Silica
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
- C09K2200/0252—Clays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
- C09K2200/0252—Clays
- C09K2200/026—Kaolin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0607—Rubber or rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0607—Rubber or rubber derivatives
- C09K2200/0612—Butadiene-acrylonitrile rubber
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0615—Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09K2200/0635—Halogen-containing polymers, e.g. PVC
- C09K2200/0637—Fluoro-containing polymers, e.g. PTFE
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0692—Fibres
- C09K2200/0695—Polyamide fibres
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Diese Erfindung bezieht sich auf Preßdichtungen und ins besondere auf solche Dichtungen, die mit Hilfe des Ka landerverfahrens unter Verwendung einer elastomeren Ara mid-Pulpe-Grundmischung hergestellt werden.This invention relates to compression seals and ins special to such seals, which with the help of Ka lander process using an elastomeric macaw mid-pulp basic mix.
Die Verstärkung von Elastomeren mit Fasern oder faseri gem Material ist wohlbekannt. Diese Fasern oder faseri gen Materialien erhöhen den Modul des Elastomers, worin sie enthalten sind, und erhöhen so die Streckfestigkeit des Elastomers. Das gleichmäßige Einmischen von Fasern und faserigen Materialien in Elastomere kann schwierig sein, besonders wenn große Mengen, d. h., <5%, der Faser oder des faserigen Materials in das Elastomer einge mischt werden sollen. Dieses Problem ist besonders lä stig bei Aramid-Fasern und -Pulpe mit hoher Festigkeit und hohem Modul, da Fasern und Pulpe so stark sind, daß sie beim Mischvorgang nicht gebrochen werden, sondern statt dessen zusammenklumpen und folglich im Elastomer ungleichmäßig verteilt sind. The reinforcement of elastomers with fibers or faseri gem material is well known. These fibers or faseri materials increase the modulus of the elastomer, in which they are included, thus increasing the tensile strength of the elastomer. The uniform mixing of fibers and fibrous materials in elastomers can be difficult be especially when large amounts, i.e. i.e., <5% of the fiber or the fibrous material in the elastomer should be mixed. This problem is particularly slow stig with aramid fibers and pulp with high strength and high modulus because fibers and pulp are so strong that they are not broken during the mixing process, but rather instead clump together and consequently in the elastomer are distributed unevenly.
Das britische Patent 21 47 589, veröffentlicht am 15. Mai 1985, offenbart eine Methode zum Dispergieren von Aramid-Fasern in kautschukartigen Polymer-Lösungen, um faserverstärkte Zusammensetzungen herzustellen.British Patent 21 47 589, published on May 15, 1985, discloses a method of dispersing of aramid fibers in rubber-like polymer solutions, to make fiber reinforced compositions.
Das US-Patent 45 14 541, erteilt an Frances am 30. April 1985, offenbart eine elastomere Zusammensetzung für den Masterbatch-Einsatz, wobei das elastomere Material der Zusammensetzung eingesetzt wird als Lösung mit einem Lösungsmittel, das verdampft und wiedergewonnen werden muß. Aramid-Pulpe ist die verstärkende Faser.U.S. Patent 4,514,541 issued to Frances on April 30 1985, discloses an elastomeric composition for the Masterbatch use, the elastomeric material being the Is used as a solution with a composition Solvent that is evaporated and recovered got to. Aramid pulp is the reinforcing fiber.
Die europäische Patentanmeldung EP-02 72 459, veröffent licht am 29. Juni 1988 an Du Pont, offenbart eine ela stomere Aramid-Pulpe-Zusammensetzung für den Master batch-Einsatz, worin das elastomere Material der Zusam mensetzung ein flüssiges Elastomer ist, das ohne organi sche Lösungsmittel eingesetzt wird. Masterbatch-Zusam mensetzungen werden verwendet als verstärkende Materia lien in Elastomer-Grundwerkstoff, der zur Herstellung von Transmissionsriemen, Verschlüssen, Verpackungen, Dichtungen, Förderbändern, Unterlagen, Reifen, Panzer kettenlaufflächen und dergleichen verwendet wird.European patent application EP-02 72 459, published light on June 29, 1988 to Du Pont, reveals an ela stomeric aramid pulp composition for the master batch use, wherein the elastomeric material of the composite composition is a liquid elastomer that has no organic cal solvent is used. Masterbatch Comp Settings are used as reinforcing materials lien in elastomer base material, which is used for manufacturing of transmission belts, closures, packaging, Seals, conveyor belts, documents, tires, tanks chain treads and the like is used.
Gemäß vorliegender Erfindung wird eine Preßdichtung zur Verfügung gestellt, bestehend aus einer flexiblen Schicht, die mit Hilfe des Kalanderverfahrens herge stellt wird mit organischen synthetischen Fasern, Füll stoffen und polymeren Bindemitteln, dadurch gekennzeich net, daß organische Fasern in die flexible Schicht ein gebracht werden in Form einer elastomeren Masterbatch- Zusammensetzung, die 1-65 Gew.-% Aramid-Pulpe, 5-85 Gew.-% Füllstoff und 5-90 Gew.-% eines Elastomers umfaßt. According to the present invention, a press seal is used Provided consisting of a flexible Layer produced using the calendering process is made with organic synthetic fibers, filling substances and polymeric binders, characterized net that organic fibers in the flexible layer be brought in the form of an elastomeric masterbatch Composition containing 1-65% by weight aramid pulp, 5-85% by weight of filler and 5-90% by weight of an elastomer includes.
Die Dichtungen gemäß vorliegender Erfindung sind flexi ble Schichten, hergestellt nach dem konventionellen Ka landerverfahren zur Erzeugung gepreßter Dichtungen unter Verwendung von Kalandern, die der Fachwelt wohlbekannt sind. Die für diese flexiblen Schichten verwendeten or ganischen Fasern werden in Form einer elastomeren Masterbatch-Zusammensetzung eingebracht, die 1-65 Gew.-% (vorzugsweise 5-65 Gew.-%) Aramid-Pulpe, 5-85 Gew.-% (vorzugsweise 10-65 Gew.-%) eines verstärkenden Füll stoffs und 5-90 Gew.-% (vorzugsweise 5-75 Gew.-%) eines Elastomers umfaßt. Eine besonders bevorzugte Master batch-Zusammensetzung umfaßt 25-50 Gew.-% Aramid-Pulpe, 30-50 Gew.-% Füllstoff und 10-50 Gew.-% Elastomer. Brauchbare elastomere Aramid-Pulpe-Zusammensetzungen können mit Hilfe des in US 45 14 541 beschriebenen Lö sungsmittelverfahrens hergestellt werden oder mit Hilfe des in EP-02 72 459 beschriebenen Flüssigelastomer-Ver fahrens. Die Offenbarungen dieser beiden Patente werden hierin mit aufgenommen im Hinblick auf die verwendeten Materialien und das angewandte Verfahren zur Gewinnung des Masterbatch. Die für diese Masterbatch-Verfahren brauchbare Aramid-Pulpe kann so wie hierin beschrieben oder aufgebrochen sein durch Einwirkung der Kräfte einer Wirbelluft-Mahlanlage oder einer dieser entsprechenden Anlage.The seals according to the present invention are flexible ble layers, manufactured according to the conventional Ka Land process for the production of pressed seals under Use of calenders that are well known to experts are. The or used for these flexible layers Ganic fibers are in the form of an elastomer Masterbatch composition introduced, the 1-65 wt .-% (preferably 5-65% by weight) aramid pulp, 5-85% by weight (preferably 10-65% by weight) of a reinforcing fill substance and 5-90% by weight (preferably 5-75% by weight) of one Elastomers includes. A particularly preferred master batch composition comprises 25-50% by weight aramid pulp, 30-50% by weight filler and 10-50% by weight elastomer. Useful elastomeric aramid pulp compositions can with the help of the Lö described in US 45 14 541 be produced by means of means or with the help of the liquid elastomer Ver described in EP-02 72 459 driving. The disclosures of these two patents will be incorporated herein with respect to those used Materials and the method used to obtain them of the masterbatch. The for this masterbatch process useful aramid pulp can be as described herein or be broken up by the forces of one Vortex air grinding plant or one of these Investment.
Erfindungsgemäße Preßdichtungen umfassen typischerweise etwa 5 bis 20 Gew.-% Aramid-Pulpe, etwa 60 bis 85 Gew.-% Füllstoffe und etwa 5 bis 20 Gew.-% Elastomer. Die Dich tungen werden hergestellt indem eine wie oben beschrie bene elastomere Aramidpulpe-Masterbatch-Zusammensetzung hergenommen und mit anderen Materialien gemischt wird, deren Brauchbarkeit für Dichtungen bekannt ist, und dann mit Hilfe des wohlbekannten Kalanderverfahrens eine fle xible Schicht gebildet wird, die als Preßdichtung brauchbar ist. Dieses Verfahren wird durchgeführt unter Verwendung irgendeiner der Kalandriermaschinen, die für diesen Zweck im Handel erhältlich sind. Vorzugsweise wird die gesamte Aramid-Pulpe als Masterbatch zugegeben; die Dichtungen werden also hergestellt durch Zugabe von mehr Elastomer und Füllstoff, um die Endzusammensetzung der Dichtung zu erhalten. Wird jedoch eine Masterbatch- Zusammensetzung verwendet, die eine geringe Menge an Aramid-Pulpe enthält, so lassen sich die Dichtungen durch Zugabe von mehr Pulpe zur Dichtungszubereitung herstellen. Je nach den im einzelnen verwendeten Materi alien werden Härter, Antioxidantien und andere Additive zugesetzt.Press seals according to the invention typically comprise about 5 to 20% by weight aramid pulp, about 60 to 85% by weight Fillers and about 5 to 20% by weight of elastomer. The you are made by using the method described above bene elastomeric aramid pulp masterbatch composition taken and mixed with other materials, whose usability for seals is known, and then using the well-known calendering process a fle xible layer is formed as a press seal is useful. This procedure is carried out at Use any of the calendering machines that are for are commercially available for this purpose. Preferably the entire aramid pulp is added as a master batch; the seals are made by adding more elastomer and filler to make the final composition to get the seal. However, if a master batch Composition used a small amount of Aramid pulp contains, so the seals by adding more pulp to the seal preparation produce. Depending on the material used in each case alien become hardeners, antioxidants and other additives added.
Weitere für die Herstellung von Dichtungen brauchbare Materialien sind Füllstoffe (sowohl organische als auch anorganische Materialien), polymere Bindemittel und Be standteile wie etwa Antioxidantien, Färbemittel, Härter und dergleichen. Bis zu 10 Gew.-% zusätzlicher Fasern können eingebracht werden, z. B. anorganische Silicat-Fa sern. Beispiele für anorganische Füllstoffe sind Talk, Aluminiumsilicat, Ruß, Bariumsulfat, Calciumcarbonat und Wollastonit. Beispiele für polymere Bindemittel sind bevorzugte Bindemittel aus elastomeren Materialien, ins besondere das gleiche, das zur Herstellung des Master batch verwendet wird oder eines, das damit verträglich ist.Other usable for the manufacture of seals Materials are fillers (both organic and inorganic materials), polymeric binders and Be components such as antioxidants, colorants, hardeners and the same. Up to 10% by weight of additional fibers can be introduced, e.g. B. inorganic silicate company ser. Examples of inorganic fillers are talc, Aluminum silicate, carbon black, barium sulfate, calcium carbonate and Wollastonite. Examples of polymeric binders are preferred binders made of elastomeric materials, ins special the same thing that is used to manufacture the master batch is used or one that is compatible with it is.
Tieferes Verständnis der Erfindung vermitteln die fol genden Beispiele, worin Anteile und Prozentanteile ge wichtsbezogen sind, wenn nichts anderes vermerkt ist, und die Temperaturen in Grad Celsius angegeben sind. Die Zugfestigkeiten werden gemäß ASTM F152 in MPa-Einheiten gemessen, und die Beibehaltung der Spannung wird gemäß ASTM F38, Methode B (abgeändert) mit Einheiten in Pro zent gemessen. Die Abänderung schließt die Temperatur ein, d. h., die Anordnung mit den eingefüllten Proben wird 22 h lang bei 288°C verschweißt. Nach Abkühlen auf 20°C wird die Restspannung der Dichtung gemessen.The fol Examples, where proportions and percentages are weight related, unless otherwise noted, and temperatures are in degrees Celsius. The Tensile strengths are measured according to ASTM F152 in MPa units is measured, and the retention of tension is determined according to ASTM F38, method B (modified) with units in pro measured cent. The amendment closes the temperature a, d. that is, the arrangement with the filled samples is welded at 288 ° C for 22 h. After cooling down The residual stress of the seal is measured at 20 ° C.
Erfindungsgemäße Preßdichtungen wurden aus einem Masterbatch folgender Zusammensetzung hergestellt:Press seals according to the invention were made from a master batch manufactured with the following composition:
- a) 44,4% p-Aramid-Pulpe (Kevlar® mit einer Faserlänge von 1-8 mm, Durchschnitt 1,1);a) 44.4% p-aramid pulp (Kevlar® with a fiber length from 1-8 mm, average 1.1);
- b) 44,4% Füllstoff (N-660-Ruß für Beispiel 1 und MP-1250-Talk für Beispiel 2); undb) 44.4% filler (N-660 carbon black for example 1 and MP-1250-Talk for Example 2); and
- c) 11,2% Nitril/Butadien-Kautschuk (Hycar® 1042).c) 11.2% nitrile / butadiene rubber (Hycar® 1042).
Zur Kontrolle wurde die Kevlar®-Aramid-Pulpe mit Hilfe herkömmlicher Kalandriermethoden unter Verwendung von N-660-Ruß als Füllstoff (Kontrolle A), MP-1250-Talk als Füllstoff (Kontrolle B) und eines Nitril-Butadiens (Hycar® 1042) als Bindemittel zu einer Preßdichtung verarbeitet (®=Eingetragenes Warenzeichen von Du Pont).The Kevlar® aramid pulp was used as a control conventional calendering methods using N-660 carbon black as filler (control A), MP-1250 talc as Filler (control B) and a nitrile butadiene (Hycar® 1042) as a binder for a press seal processed (® = registered trademark of Du Pont).
Alle drei Dichtungen (etwa 2 mm dick) wurden so zubereitet, daß sich die ungefähre Dichtungszusammensetzung wie folgt ergab:All three seals (about 2 mm thick) were prepared that the approximate seal composition such as resulted in:
15% Kevlar®-Pulpe;
72% Füllstoff;
13% Nitril/Butadien-Kautschuk; und
1% Härter und Antioxidationsmittel.15% Kevlar® pulp;
72% filler;
13% nitrile / butadiene rubber; and
1% hardener and antioxidant.
Die Ergebnisse sind in Tabelle I gezeigt. The results are shown in Table I.
Die Beibehaltung der Spannung in einer Preßdichtung ist wichtig, da sie die Fähigkeit der Dichtung zur Aufrecht erhaltung einer gegebenen Druckfestigkeit (z. B. zwischen zwei verschraubten Flanschen) in Abhängigkeit von der Zeit wiederspiegelt. Unerwartet ist die deutliche Zunah me (mehr als etwa 100%) bei der Beibehaltung der Span nung, welche die erfindungsgemäßen Dichtungen zeigen, die unter Verwendung eines elastomeren Aramid-Pulpe- Masterbatch hergestellt wurden, gegenüber gleichartigen Dichtungen, die aus Aramid-Pulpe allein hergestellt wur den. Dies besonders deswegen, weil es keine merkliche Erhöhung der Zugfestigkeit gibt.Maintaining the tension in a press seal is important because of the ability of the seal to stand up maintenance of a given compressive strength (e.g. between two screwed flanges) depending on the Reflects time. The significant increase is unexpected me (more than about 100%) while maintaining the span tion, which show the seals of the invention, which using an elastomeric aramid pulp Masterbatch were produced, compared to similar Seals made from aramid pulp alone the. This is especially because there is no noticeable Increase in tensile strength there.
Claims (5)
- a) 5 bis 20 Gew.-% Poly(p-phenylenterephthal amid)-Aramid-Pulpe mit Faserlängen im Bereich von 0,1 bis 8 mm;
- b) 60 bis 85 Gew.-% eines Füllstoffs; und
- c) 5 bis 20 Gew.-% eines Elastomers.
- a) 5 to 20 wt .-% poly (p-phenylene terephthalamide) aramid pulp with fiber lengths in the range of 0.1 to 8 mm;
- b) 60 to 85% by weight of a filler; and
- c) 5 to 20% by weight of an elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4123737A DE4123737A1 (en) | 1991-07-17 | 1991-07-17 | Pressed gaskets with increased tensile strength - contain poly:aromatic amide] fibre pulp and are prepd. by calendering the fibres being added as masterbatch contg. reinforcing filler and elastomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4123737A DE4123737A1 (en) | 1991-07-17 | 1991-07-17 | Pressed gaskets with increased tensile strength - contain poly:aromatic amide] fibre pulp and are prepd. by calendering the fibres being added as masterbatch contg. reinforcing filler and elastomer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4123737A1 true DE4123737A1 (en) | 1993-01-21 |
Family
ID=6436393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4123737A Withdrawn DE4123737A1 (en) | 1991-07-17 | 1991-07-17 | Pressed gaskets with increased tensile strength - contain poly:aromatic amide] fibre pulp and are prepd. by calendering the fibres being added as masterbatch contg. reinforcing filler and elastomer |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4123737A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001088055A1 (en) * | 2000-05-19 | 2001-11-22 | Donit Tesnit, Družba Za Proizvodnjo Tesnilnih Materialov, D.D., Medvode | Soft sealing material |
| RU2757294C1 (en) * | 2020-12-29 | 2021-10-13 | Общество с ограниченной ответственностью "ГБЦ" | Sealing sheet material for use in liquid and fuel-oil environments |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5986683A (en) * | 1982-11-10 | 1984-05-18 | Kishiyuu Seishi Kk | Sealing material |
| US4514541A (en) * | 1984-05-21 | 1985-04-30 | E. I. Du Pont De Nemours And Company | Fiber containing particulate elastomeric composition |
| EP0272459A2 (en) * | 1986-11-20 | 1988-06-29 | E.I. Du Pont De Nemours And Company | Masterbatch with fiber and liquid elastomer |
| DE3735634A1 (en) * | 1987-10-21 | 1989-05-03 | Goetze Ag | Flexible gasket material, in particular for cylinder-head gaskets |
-
1991
- 1991-07-17 DE DE4123737A patent/DE4123737A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5986683A (en) * | 1982-11-10 | 1984-05-18 | Kishiyuu Seishi Kk | Sealing material |
| US4514541A (en) * | 1984-05-21 | 1985-04-30 | E. I. Du Pont De Nemours And Company | Fiber containing particulate elastomeric composition |
| EP0272459A2 (en) * | 1986-11-20 | 1988-06-29 | E.I. Du Pont De Nemours And Company | Masterbatch with fiber and liquid elastomer |
| DE3735634A1 (en) * | 1987-10-21 | 1989-05-03 | Goetze Ag | Flexible gasket material, in particular for cylinder-head gaskets |
Non-Patent Citations (3)
| Title |
|---|
| DE-Buch: LUEGER: Lexikon der Technik, 4. Aufl. Bd. 8, S. 479-480 * |
| Pat. Abstr. Japan C 241 September 5, 1984 Vol. 8/No. 193 & JP 59-086 683 A * |
| US-Buch: KIRK-OTHMER: Encyclopedia of Chemical Technology, 3. Aufl., John Wiley & Sons, Vol. 20, S. 435-445 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001088055A1 (en) * | 2000-05-19 | 2001-11-22 | Donit Tesnit, Družba Za Proizvodnjo Tesnilnih Materialov, D.D., Medvode | Soft sealing material |
| RU2757294C1 (en) * | 2020-12-29 | 2021-10-13 | Общество с ограниченной ответственностью "ГБЦ" | Sealing sheet material for use in liquid and fuel-oil environments |
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| 8130 | Withdrawal |