DE599405C - Process for the production of concentrated rubber solutions - Google Patents

Process for the production of concentrated rubber solutions

Info

Publication number
DE599405C
DE599405C DEL81977D DEL0081977D DE599405C DE 599405 C DE599405 C DE 599405C DE L81977 D DEL81977 D DE L81977D DE L0081977 D DEL0081977 D DE L0081977D DE 599405 C DE599405 C DE 599405C
Authority
DE
Germany
Prior art keywords
production
rubber
concentrated
rubber solutions
nitric acid
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
DEL81977D
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.)
FLORIA RADULESCO
LACK und FARBEN FABRIK HALLE N
Original Assignee
FLORIA RADULESCO
LACK und FARBEN FABRIK HALLE N
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 FLORIA RADULESCO, LACK und FARBEN FABRIK HALLE N filed Critical FLORIA RADULESCO
Priority to DEL81977D priority Critical patent/DE599405C/en
Application granted granted Critical
Publication of DE599405C publication Critical patent/DE599405C/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
    • C08C19/08—Depolymerisation

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)

Description

Verfahren zur Herstellung von konzentrierten Kautschuklösungen Die bekannten sogenannten Kautschuklösungen enthalten etwa 5 bis 7 % Kautschuk. Sie sind aber keine wirklichen Lösungen, sondern nur kolloidale Suspensionen, die man nicht mit dem Pinsel oder der Spritzpistole auftragen kann.Process for the preparation of concentrated rubber solutions The known so-called rubber solutions contain about 5 to 7% rubber. she but are not real solutions, just colloidal suspensions that you can use cannot apply with a brush or spray gun.

Vorliegende Erfindung gestattet die Herstellung hochkonzentrierter Kautschuklösungen mit einem Gehalt von q o bis 6o % Kautschuk..The present invention allows the production of highly concentrated Rubber solutions with a content of qo to 6o% rubber ..

Das Verfahren beruht darauf, daß man den Kautschuk, der sich in einem gewöhnlichen Lösungsmittel, wie z. B. Benzin oder Benzol, verteilt bzw. .gelöst befindet, zum Zwecke der Depolymerisierung bei Zimmertemperatur mit zo % seines Gewichtes 52,77%iger Salpetersäure behandelt.The process is based on the fact that the rubber, which is in a common solvents, such as. B. gasoline or benzene, distributed or. Solved is located, for the purpose of depolymerization at room temperature with zo% of his Weight 52.77% nitric acid treated.

Wenn der Abbau weit genug fortgeschritten ist, wird die Reaktion durch Zugabe einer Base unterbrochen, wozu zweckmäßig Bariumcarbonat verwandt wird, weil es auch gleichzeitig das vorhandene Wasser bindet. Nun wird dekantiert. Es resultiert eine Lösung, die durch teilweises Verjagen des Lösungsmittels-höher konzentriert werden kann. Diese Lösung klebt aber noch und trocknet schwierig. Um diese Übelstände abzustellen, wird der Kautschuk durch Zugabe von Antimontrichlorid repolymerisiert. Gegebenenfalls kann auch eine ähnliche Wirkung durch Phthalsäure in alkoholischer Lösung bewirkt werden, die ja bekanntermaßen sehr gute Polymerisationseigenschaften hat (vgl. z. B. die Phthals.äurekunstharze).When the breakdown has progressed enough, the reaction will be through Interrupted addition of a base, for which purpose barium carbonate is used because it also binds the existing water at the same time. Now it is decanted. It results a solution that is more concentrated by partially driving off the solvent can be. However, this solution is still sticky and difficult to dry. About these evils turn off, the rubber is repolymerized by adding antimony trichloride. If necessary, phthalic acid can have a similar effect in alcoholic Solution are brought about, which are known to have very good polymerization properties has (see e.g. the phthalic acid synthetic resins).

Zwar hat man auch früher schon Kautschuk z. B. mit konzentrierter Salpetersäure behandelt; es sind dabei aber Produkte entstanden, die dann in den in Betracht kommenden Lösungsmitteln unlöslich waren. Beispiel Man verteilt tokg Kautschuk in gokg Benzol und stellt durch Rühren eine gleichmäßige Paste her, was ungefähr 2q. Stunden in Anspruch nimmt. Alsdann setzt man 11--9 52,77%i,ger Salpetersäure zu.It is true that rubber z. B. with more concentrated Nitric acid treated; however, there were products that were then used in the eligible solvents were insoluble. Example You distribute tokg Rubber in gokg benzene and stir to make a uniform paste, what about 2q. Takes hours. Then 11--9 52.77% i, ger nitric acid is added to.

Wenn der gewünschte Grad der Depolymerisation erreicht ist, neutralisiert man mit 1/2 kg Bariumcarbonat.When the desired degree of depolymerization is reached, neutralized one with 1/2 kg of barium carbonate.

Man dekantiert und fügt 1/2 kg Antimontrichlorid oder Phthalsäure in alkoholischer Lösung zu.Decant and add 1/2 kg of antimony trichloride or phthalic acid in alcoholic solution too.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer konzentrierten Kautschuklösung durch Behandeln derselben mit Salpetersäure, dadurch gekennzeichnet, daß die bei Zimmertemperatur mit io % ihres Gewichtes 52,77ojoiger- Salpetersäure behandelt lind der Prozeß nach Erreichung des gewünschten oxydativen Abbaues durch Zugabe einer Base, zweckmäßig Bariumcarbonat, unterbrochen wird, worauf die Lösung mit etwa 5 Gewichtsprozenten Antimontrichlorid oder Phthalsäure nachbehandelt wird.PATENT CLAIM: Process for the production of a concentrated rubber solution by treating them with nitric acid, thereby marked, that at room temperature with io% of their weight 52.77ojoiger nitric acid treated and the process carried out after the desired oxidative degradation has been achieved Addition of a base, expediently barium carbonate, is interrupted, whereupon the solution is aftertreated with about 5 percent by weight of antimony trichloride or phthalic acid.
DEL81977D 1932-09-09 1932-09-09 Process for the production of concentrated rubber solutions Expired DE599405C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL81977D DE599405C (en) 1932-09-09 1932-09-09 Process for the production of concentrated rubber solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL81977D DE599405C (en) 1932-09-09 1932-09-09 Process for the production of concentrated rubber solutions

Publications (1)

Publication Number Publication Date
DE599405C true DE599405C (en) 1934-06-30

Family

ID=7285178

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL81977D Expired DE599405C (en) 1932-09-09 1932-09-09 Process for the production of concentrated rubber solutions

Country Status (1)

Country Link
DE (1) DE599405C (en)

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