DE556904C - Process for the production of microporous rubber - Google Patents
Process for the production of microporous rubberInfo
- Publication number
- DE556904C DE556904C DEB143451D DEB0143451D DE556904C DE 556904 C DE556904 C DE 556904C DE B143451 D DEB143451 D DE B143451D DE B0143451 D DEB0143451 D DE B0143451D DE 556904 C DE556904 C DE 556904C
- Authority
- DE
- Germany
- Prior art keywords
- rubber
- production
- salts
- milk
- microporous rubber
- 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.)
- Expired
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
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- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
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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
- C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
-
- 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
- C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B13/00—Diaphragms; Spacing elements
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/74—Rollers or roller bearings
- D01H5/80—Rollers or roller bearings with covers; Cots or covers
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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
- C08J2321/00—Characterised by the use of unspecified rubbers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Description
Verfahren zur Herstellung von mikroporösem Kautschuk Durch Patent ¢25 770 ist ein Verfahren zur Herstellung von Kautschuk mit einer großen Anzahl mikroskopisch kleiner Poren geschützt, welches dadurch gekennzeichnet ist, daß Kautschukmilch mit Hilfe an sich bekannter Mittel, wie z. B. Lösungen von MagIiesium- oder Bariumsalzen, in eine homogene zusammenhängende Gallerte verwandelt und unter Vermeidung von Zusatzstoffen, welche Gase oder Dämpfe entwickeln könnten, unter solchen Bedingungen vulkanisiert wird, daß eine Verdampfung des in den Poren enthaltenen Wassers nicht stattfinden kann.Process for the production of microporous rubber A process for the production of rubber with a large number of microscopically small pores is protected by patent [25 770 ], which is characterized in that rubber milk with the aid of means known per se, such as. B. solutions of magnesium or barium salts, transformed into a homogeneous coherent jelly and, avoiding additives which could develop gases or vapors, vulcanized under such conditions that an evaporation of the water contained in the pores cannot take place.
Durch Patent 44261g ist dieses Verfahren dahin ausgebildet worden, daß die Kautschukmilch zunächst in an sich bekannter Weise durch Zugabe von sie verdickenden Mitteln, wie z. B. Alaun, Zinksulfat oder Eisenchlorid, in einen Brei übergeführt, dieser, nachdem man ihn gegebenenfalls vorher in gewünschte Form gebracht hat, mit Hilfe beliebiger Koagulierungsmittel in eine feste zusammenhängende Gallertform übergeführt und die Gallerte alsdann im Sinne des Hauptpatents 425.77o vulkanisiert wird.This process has been developed by patent 44261g, that the rubber milk first in a known manner by adding them thickening agents, such as B. alum, zinc sulfate or ferric chloride, in a pulp transferred, this after it has been brought into the desired form, if necessary has, with the help of any coagulant, into a solid, cohesive gelatinous form transferred and the jelly then vulcanized in the sense of the main patent 425.77o will.
Es hat sich nun gezeigt, daß auch Salze einwertiger Kationen, wie z. B. Chlornatrium oder salicylsaures Natrium, wenn sie in ausreichenden Konzentrationen und Mengenverhältnissen zugefügt werden, dazu verwendet werden können, die Kautschukmilch sofort in breiigen Zustand überzuführen. Diese Salze haben vor dem früher vorgeschlagenen Alaun den Vorteil der leichteren Löslichkeit in der Kälte und vor den Salzen der Schwermetalle den Vorteil, daß keine Stoffe zugefügt werden, die während der Vulkanisation störend wirken können. Sie besitzen gegenüber den Al-.'Fe- und Zn-Salzen auch insofern große Vorzüge, als letztere mit N a2 C 03, K O H, Seifen sowie vielen anderen Stoffen, die in der Kautschukmilch enthalten sind oder ihr zugefügt werden, schwer lösliche Niederschläge bilden, die später im fertigen mikroporösen Kautschuk eingeschlossen sind und bei dessen Benutzung, z. B. als Säurefilter, infolge des allmählichen Herauslösens der Niederschläge zu schweren Störungen Anlaß geben. Die Alkalisalze hingegen lassen sich durch einfaches Wässern des mikroporösen Kautschuks vollständig entfernen.It has now been shown that salts of monovalent cations, such as z. B. Sodium chloride or sodium salicylic acid, if they are in sufficient concentrations and proportions are added, can be used to make the rubber milk immediately put into a pulpy state. These salts have been proposed before Alum has the advantage of easier solubility in the cold and in front of the salts Heavy metals have the advantage that no substances are added during vulcanization can be disturbing. Compared to the Al -, 'Fe and Zn salts, they also have in this respect great advantages, as the latter with N a2 C 03, K O H, soaps and many other substances, those contained in or added to rubber milk are sparingly soluble Precipitates form, which later become trapped in the finished microporous rubber are and when using it, e.g. B. as an acid filter, as a result of the gradual leaching the precipitation give rise to serious disturbances. The alkali salts, however, leave can be completely removed by simply soaking the microporous rubber.
Durch Zugabe von Lösungen derartiger Mittel zu der Kautschukmilch gelingt es, diese ohne Koagulation reversibel zu verdicken. Das so erhaltene Erzeugnis isst im Gegensatz zu den durch die obenerwähnten Koagulationsmittel gewonnenen unbegrenzt haltbar. Das Verfahren hat sich insbesondere auch als sehr - geeignet erwiesen für die Verarbeitung von Kautschukmilch, welche Seife enthält. Seife; die vielfach in Kautschukmilchkonzentraten von der Herstellung her enthalten ist, wirkt im Sinne einer Unterstützung des Verdickungsprozesses. Es ist indessen nicht angängig, durch Zusatz von Seifen allein die Verdickung hervorzubringen, da sie in Mengen, wie sie für die Verdickung erforderlich sind, einen die Verwendungszwecke des mikroporösen Kautschuk störenden Einfluß ausüben. Beispiel Man setzt zu r oo g einer Mischung, welche unter Verwendung eines Kautschukmilchkonzentrates, das z. B. nach dem Patent 419658 hergestellt wurde und das 150,10 Schwefel und 2% Age rite (Phenyl-(3-naphthylamin) enthält und dessen Trockenkautschukgehalt 6o% beträgt, to ccm einer r 5 %igen Natriumchloridlösung. Es tritt starke Verdickung ein. 1iiese Mischung streicht man aus und koaguliert sie in der üblichen Weise, z. B. mit Salzsäure- oder Schwefeldioxyddampf usw., worauf im Sinne des Hauptpatents 425 770 vulkanisiert wird. Gegebenenfalls kann man auch Natriumsalze zusammen mit den bereits als Eindickungsmittel bekannten Salzen mehrwertiger Kationen mit Vorteil verwenden.By adding solutions of such agents to the rubber milk, it is possible to thicken it reversibly without coagulation. The product obtained in this way, in contrast to that obtained by the above-mentioned coagulants, has an unlimited shelf life. The method has also proven to be particularly suitable for processing rubber milk which contains soap. Soap; which is often contained in rubber milk concentrates during production, acts to support the thickening process. However, it is not feasible to produce the thickening by adding soaps alone, since they have an influence which interferes with the intended use of the microporous rubber in the amounts required for the thickening. EXAMPLE One sets to r oo g of a mixture which, using a rubber milk concentrate, z. B. was prepared according to patent 419658 and which contains 150.10 sulfur and 2% Age rite (phenyl- (3-naphthylamine) and whose dry rubber content is 60% to ccm of a 5% sodium chloride solution. Strong thickening occurs. This mixture is spread out and coagulated in the usual way, e.g. with hydrochloric acid or sulfur dioxide vapor, etc., which is followed by vulcanization in accordance with the main patent 425 770. If necessary, sodium salts can also be used together with the salts of polyvalent cations already known as thickeners use with advantage.
Es ist bereits bekannt, durch Zusatz von Natriumfluorid und Stehenlassen während 5 bis 8 Stunden die Viskosität von Kautschukmilch zu erhöhen. Bei dem vorliegenden Verfahren handelt .es sich dagegen um die unmittelbare überführung der Kautschukmilch in breiartigen Zustand.It is already known by adding sodium fluoride and leaving it to stand to increase the viscosity of rubber milk for 5 to 8 hours. With this one The process is, on the other hand, the direct transfer of the rubber milk in a mushy state.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB143451D DE556904C (en) | 1924-09-27 | 1929-05-04 | Process for the production of microporous rubber |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE425770T | 1924-09-27 | ||
DEB119491D DE437172C (en) | 1925-04-29 | 1925-04-29 | Process for the production of rubber with a large number of microscopic pores |
DE442619T | 1925-06-25 | ||
DE439980T | 1925-09-01 | ||
DE623943T | 1928-10-26 | ||
DE561568T | 1928-12-24 | ||
DE556904T | 1929-05-03 | ||
DEB143451D DE556904C (en) | 1924-09-27 | 1929-05-04 | Process for the production of microporous rubber |
Publications (1)
Publication Number | Publication Date |
---|---|
DE556904C true DE556904C (en) | 1932-08-16 |
Family
ID=31950976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB143451D Expired DE556904C (en) | 1924-09-27 | 1929-05-04 | Process for the production of microporous rubber |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE556904C (en) |
-
1929
- 1929-05-04 DE DEB143451D patent/DE556904C/en not_active Expired
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