DE914320C - Process for the production of reaction products from rubber vulcanizates - Google Patents

Process for the production of reaction products from rubber vulcanizates

Info

Publication number
DE914320C
DE914320C DEG7635A DEG0007635A DE914320C DE 914320 C DE914320 C DE 914320C DE G7635 A DEG7635 A DE G7635A DE G0007635 A DEG0007635 A DE G0007635A DE 914320 C DE914320 C DE 914320C
Authority
DE
Germany
Prior art keywords
oxygen
production
reaction products
rubber
rubber vulcanizates
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
DEG7635A
Other languages
German (de)
Inventor
Dr Walter Voigt
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.)
Goetzewerke Friedrich Goetze AG
Original Assignee
Goetzewerke Friedrich Goetze 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 Goetzewerke Friedrich Goetze AG filed Critical Goetzewerke Friedrich Goetze AG
Priority to DEG7635A priority Critical patent/DE914320C/en
Application granted granted Critical
Publication of DE914320C publication Critical patent/DE914320C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08CTREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
    • C08C19/00Chemical modification of rubber

Description

Verfahren zur Herstellung von Umsetzungsprodukten aus Kautschukvulkanisaten Bekanntlich tritt durch die Einwirkung von Sauerstoff auf Kautschuk eine Aufspaltung der Molekülketten ein, wobei Spaltprodukte entstehen, welche sowohl die Verarbeitung des Kautschuks bei der Herstellung der Mischung als auch die Regenerierung von Vulkanisaten erleichtern.Process for the production of reaction products from vulcanized rubber It is known that the action of oxygen on rubber causes splitting of the molecular chains, whereby cleavage products arise, which both the processing of the rubber in the manufacture of the mixture as well as the regeneration of vulcanizates facilitate.

Die Zahl der Doppelbindungen der Spaltprodukte ist durch die Aufspaltung des Kautschukmoleküls in nachweisbarer Menge kaum geändert worden. Jedoch sind durch den chemischen Angriff des Sauerstoffs Produkte entstanden, die durch einen bemerkenswerten Gehalt an gebundenem Sauerstoff charakterisiert sind. Im Schrifttum wird die Auffassung vertreten, daß die Bindung des Sauerstoffs zweifellos an den Spaltstellen erfolgte, wobei sauerstoffhaltige Gruppen, z. B. Aldehyd- und Hydroxylgruppen, gebildet wurden. Es besteht jedoch durchaus die Wahrscheinlichkeit, daß, vor allem bei intensiver Behandlung mit Sauerstoff bzw. sauerstoffabspaltenden Verbindungen, auch an Doppelbindungen Hydroxylgruppen angelagert werden.The number of double bonds in the cleavage products is due to the splitting of the rubber molecule has hardly been changed in a detectable amount. However are through the chemical attack of the oxygen arose by a remarkable product Content of bound oxygen are characterized. In the literature the conception represent that the binding of oxygen undoubtedly took place at the cleavage sites, where oxygen-containing groups, e.g. B. aldehyde and hydroxyl groups were formed. However, there is a good chance that, especially with intense Treatment with oxygen or oxygen-releasing compounds, also on double bonds Hydroxyl groups are added.

Während die Technik bisher ausschließlich das Vorhandensein der Doppelbindungen in den Spaltstücken ausgenutzt hat, indem durch Vulkanisatidn ein Wiederaufbau zu einem größeren Molekülverband durchgeführt wurde, hat es bisher an Versuchen gefehlt, die Aldehyd- bzw. Hydroxylgruppen für den gleichen Zweck heranzuziehen.While the technology so far exclusively the presence of the double bonds in the split pieces has been exploited by a reconstruction through Vulkanisatidn a larger molecular association was carried out, there has been a lack of attempts to date to use the aldehyde or hydroxyl groups for the same purpose.

Es wurde nun gefunden, daß sich technisch wertvolle Produkte besonders dann aufbauen lassen, wenn zur Reaktion mit den Aldehyd- bzw. Hydroxylgruppen Verbindungen verwendet werden, welche polyfunktionelle Gruppen aufweisen, also Verbindungen, welche mindestens zwei reaktive Gruppen besitzen, z. B. Ketone oder Isocyanate.It has now been found that technically valuable products are particularly useful then let it build up when there are compounds to react with the aldehyde or hydroxyl groups be used which polyfunctional Have groups, so Compounds which have at least two reactive groups, e.g. B. ketones or Isocyanates.

Beispiel Gemahlene Abfälle von Vulkanisaten werden mit io °/o einer 3o°/oigen Wasserstoffsuperoxydlösung Bruch- Bruchdehnung Härte Elastizität Quellung festigkeit in Öl Ausgangsvulkanisat . . . . . . . . . . . . . . IM 130 81 6 -3,50 11o Nach der Behandlung . . . . . . . . . . . 140 135 83 4 -3,00/0 Example Ground vulcanizate waste is treated with 10% of a 30% hydrogen peroxide solution Elongation at break, hardness, elasticity, swelling strength in oil Starting vulcanizate. . . . . . . . . . . . . . IM 130 81 6 - 3.50 11o After treatment . . . . . . . . . . . 140 135 83 4 -3.00 / 0

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von Umsetzungsprodukten aus Kautschukvulkanisaten, dadurch gekennzeichnet, daß mit Sauerstoff bzw. sauerstoffabspaltenden Mitteln behandeltes Kautschukdurchgerührt und einige Stunden stehengelassen, die Temperatur steigt hierbei auf etwa 70°. Nach dem Trocknen werden sie mit einem Ketonharz auf der Walze zu einem Fell verarbeitet, das nach Zufügung von Schwefel und den üblichen Vulkanisationsmitteln vulkanisiert wird. Das Produkt besitzt folgende Eigenschaften vulkanisat mit solchen Verbindungen zur Reaktion gebracht wird, welche mindestens zwei funktionelle Gruppen aufweisen. PATENT CLAIMS: i. Process for the production of reaction products made of vulcanized rubber, characterized in that with oxygen or oxygen-releasing Medium-treated rubber through and left to stand for a few hours The temperature rises to about 70 °. After drying they are covered with a ketone resin processed on the roller to a skin, which after the addition of sulfur and the common vulcanizing agents is vulcanized. The product has the following properties vulcanizate is reacted with such compounds, which at least have two functional groups. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß als polyfunktionelle Gruppen Ketone oder Isocyanate verwendet werden.2. The method according to claim i, characterized in that that ketones or isocyanates are used as polyfunctional groups.
DEG7635A 1951-12-13 1951-12-13 Process for the production of reaction products from rubber vulcanizates Expired DE914320C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG7635A DE914320C (en) 1951-12-13 1951-12-13 Process for the production of reaction products from rubber vulcanizates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG7635A DE914320C (en) 1951-12-13 1951-12-13 Process for the production of reaction products from rubber vulcanizates

Publications (1)

Publication Number Publication Date
DE914320C true DE914320C (en) 1954-07-01

Family

ID=7118594

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG7635A Expired DE914320C (en) 1951-12-13 1951-12-13 Process for the production of reaction products from rubber vulcanizates

Country Status (1)

Country Link
DE (1) DE914320C (en)

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