DE389656C - Process for the hydrogenation of artificial and natural rubbers - Google Patents

Process for the hydrogenation of artificial and natural rubbers

Info

Publication number
DE389656C
DE389656C DES56049D DES0056049D DE389656C DE 389656 C DE389656 C DE 389656C DE S56049 D DES56049 D DE S56049D DE S0056049 D DES0056049 D DE S0056049D DE 389656 C DE389656 C DE 389656C
Authority
DE
Germany
Prior art keywords
hydrogenation
artificial
rubber
natural rubbers
hydrogen
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
Application number
DES56049D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to DES56049D priority Critical patent/DE389656C/en
Application granted granted Critical
Publication of DE389656C publication Critical patent/DE389656C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
    • C08C19/00—Chemical modification of rubber
    • C08C19/02—Hydrogenation

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Tires In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

Verfahren zum Hydrieren von künstlichen und natürlichen Kautschukarten. Es wurde-°gefcmdeir, - .rtaß- @nan 1ü nstlidrc und natürliche Kautschukarten hydrieren kann, wenn man die Lösungen aus Kautschuk in Äther, Ligroin, Cyclohexan oder Homologen derselben mit Wasserstoff in Gegenwart von Platinmohr oder Palladiummohr behandelt. Das Verfahren ist sowohl bei natürlichen wie bei künstlichen Kautschukarten anwendbar. Beispiel I. Frisch dargestellter Dimethylbutadienkautschuk, durch sechswöchentliches Erhitzen von ;ß y-Dimethylbutadien im Rohr auf 8o° bereitet, wird durch Erhitzen im Vakuum möglichst vollständig von unverändertem Ausgangsmaterial und dunerem Terpen befreit, darauf sofort in absolutem Äther gelöst und mit nach bekanntem Verfahren dargestelltem Platinmohr unter Einleiten von reinem Wasserstoff bei ,gewöhnlicher Temperatur gerührt oder geschüttelt. Der Wasserstoff wird zuerst so stark absorbiert, daß sich ständig Unterdruck bildet. Erst gegen Tiide der Operation verlangsamt sich der Absorptionsprozeß, und man gibt zweckmäßig zur Beschleunigung etwas Überdruck auf. Durch l:.iltration entfernt man das Platin und erhält »ach dem Verdampfen es Lösungsmittels eine wenig gefiirl)te Masse, die (len -Nerv des Kautschuks-verloren. liat; aber- noch bewisse plastische Eigenschaften besitzt. Beispiel II.Process for the hydrogenation of artificial and natural rubbers. It was - ° Gefcmdeir, - .rtass- @nan 1ü nstlidrc and natural rubber types hydrogenated can, if you look at the solutions of rubber in ether, ligroin, cyclohexane or homologues the same treated with hydrogen in the presence of platinum black or palladium black. The method can be used for both natural and synthetic rubber types. Example I. Freshly made dimethylbutadiene rubber, through six weekly Heating of; β-dimethylbutadiene in the tube to 80 ° is prepared by heating in a vacuum as completely as possible from unchanged starting material and darker terpene freed, then immediately dissolved in absolute ether and using a known method shown platinum black with the introduction of pure hydrogen, more common Temperature stirred or shaken. The hydrogen is first absorbed so strongly that that negative pressure is constantly forming. Only towards the end of the operation slows down the absorption process, and it is advisable to give a little overpressure to accelerate it on. The platinum is removed by filtration, and after evaporation it is obtained Solvent a little filled mass, the (the nerve of the rubber) lost. liat; but still has certain plastic properties. Example II.

Eine frisch dargestellte Lösung von Parakautschuk in Cyclohexan wird auf die gleiche Weise behandelt. Die Aufnahme des Wasserstoffs erfolgt langsam steigend bei Erhöhung ,des Druckes auf mehrere Atmosphären. Es läßt sich für den Druck keine bestimmte Zahl angeben, da der zur Verwendung bei der Reduktion gelangende Naturkautschuk je nach Reinheit, ob ungefällt oder nicht, sehr verschieden schnell absorbiert. Der reduzierte Parakautschuk .ist eine bräunliche opake Masse.A freshly made solution of para rubber in cyclohexane is made treated in the same way. The uptake of hydrogen increases slowly if the pressure is increased to several atmospheres. It cannot be used for printing Specify a certain number as the natural rubber used in the reduction Depending on the purity, whether unpolluted or not, absorbed at very different rates. The reduced para rubber is a brownish opaque mass.

Die Wasserstoffaufnahme entspricht ungefähr der Menge von vier Atomen Wasserstoff auf die Formel C., Hl.. Die Reduktion ist beendet, wenn die Cyclohexanlösung eine Bromlösung nichtmehr entfärbt.The hydrogen uptake corresponds roughly to the amount of four atoms Hydrogen to formula C., Hl .. The reduction is complete when the cyclohexane solution a bromine solution no longer decolorizes.

Der hydrierte Kautschuk soll entweder für sich oder in Mischung mit Kautschuk:, Äthylzellulose, Bitumen und ähnlichen Stoffen als Isoliermittel verwendet werden.The hydrogenated rubber should either stand alone or in admixture with Rubber:, ethyl cellulose, bitumen and similar materials used as insulating materials will.

Claims (2)

PATRNT-ANsPRücHL: i. Verfahren zum Hydrieren von künstlichen und- natürlichen Kautschukarten. ,ladurch gekennzeichnet, (Iali man die :1_(*:@- sungen der Kautschukarten in Ather, Ligroin, Cyclohexan oder Homologen derselben mit Wasserstoff in Gegenwart von Platinmohr oder Palladiummohr.
gegebenenfalls bei erh cätein Druck, hehandelt. PATRNT CLAIM: i. Process for the hydrogenation of artificial and natural rubbers. , marked by, (Iali man die: 1 _ (*: @ - sings of the types of rubber in ether, Ligroin, cyclohexane or homologues same with hydrogen in the presence of platinum black or palladium black.
if necessary, if pressure is received, traded. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß der Druck allmählich gesteigert wird.2. The method according to claim i, characterized characterized in that the pressure is gradually increased.
DES56049D 1921-04-05 1921-04-05 Process for the hydrogenation of artificial and natural rubbers Expired DE389656C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES56049D DE389656C (en) 1921-04-05 1921-04-05 Process for the hydrogenation of artificial and natural rubbers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES56049D DE389656C (en) 1921-04-05 1921-04-05 Process for the hydrogenation of artificial and natural rubbers

Publications (1)

Publication Number Publication Date
DE389656C true DE389656C (en) 1924-02-05

Family

ID=7490833

Family Applications (1)

Application Number Title Priority Date Filing Date
DES56049D Expired DE389656C (en) 1921-04-05 1921-04-05 Process for the hydrogenation of artificial and natural rubbers

Country Status (1)

Country Link
DE (1) DE389656C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764664C (en) * 1936-05-14 1952-12-15 Siemens & Halske A G Process for the production of a hydrogenated rubber which is particularly useful as an electrically high-quality insulating material
DE3346888A1 (en) * 1982-12-23 1984-07-05 Nippon Zeon Co., Ltd., Tokyo METHOD FOR CATALYTICLY HYDRATING CONJUGATED SERVICE POLYMERS
WO1999032529A1 (en) * 1997-12-19 1999-07-01 Shell Internationale Research Maatschappij B.V. Process for hydrogenation of macromolecular organic substrates

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764664C (en) * 1936-05-14 1952-12-15 Siemens & Halske A G Process for the production of a hydrogenated rubber which is particularly useful as an electrically high-quality insulating material
DE3346888A1 (en) * 1982-12-23 1984-07-05 Nippon Zeon Co., Ltd., Tokyo METHOD FOR CATALYTICLY HYDRATING CONJUGATED SERVICE POLYMERS
DE3346888C2 (en) * 1982-12-23 1991-04-11 Nippon Zeon Co., Ltd., Tokio/Tokyo, Jp
WO1999032529A1 (en) * 1997-12-19 1999-07-01 Shell Internationale Research Maatschappij B.V. Process for hydrogenation of macromolecular organic substrates
US6087455A (en) * 1997-12-19 2000-07-11 Shell Oil Company Process for hydrogenation of macromolecular organic substrates

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