DE1301499B - Process for improving the raw strength of rubber mixtures containing gel-free or low-gel synthetic rubbers - Google Patents

Process for improving the raw strength of rubber mixtures containing gel-free or low-gel synthetic rubbers

Info

Publication number
DE1301499B
DE1301499B DE19681770315 DE1770315A DE1301499B DE 1301499 B DE1301499 B DE 1301499B DE 19681770315 DE19681770315 DE 19681770315 DE 1770315 A DE1770315 A DE 1770315A DE 1301499 B DE1301499 B DE 1301499B
Authority
DE
Germany
Prior art keywords
mixture
gel
synthetic rubbers
rubber mixtures
free
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.)
Pending
Application number
DE19681770315
Other languages
German (de)
Inventor
Brunner
Dipl-Chem Dr Gottfried
Droessler
Dipl-Chem Dr H-G
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.)
Continental AG
Original Assignee
Continental Gummi Werke 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 Continental Gummi Werke AG filed Critical Continental Gummi Werke AG
Priority to DE19681770315 priority Critical patent/DE1301499B/en
Publication of DE1301499B publication Critical patent/DE1301499B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/32—Compounds containing nitrogen bound to oxygen

Description

Mischungs-Nr. 1 2 3 4 5 6 7 c) Fertigmischung (Walze 50°C, Laufzeit 8 Minuten) Schwefel..................... 3,0 3,0 3,0 3,0 3,0 3, 0 3,0 Beschleuniger 1, 3 1,3 1, 3 1, 3 1, 15 1, 15 l 1, 15 Festigkeit (kplcm2) (DIN 53504) 140 110 91 1 106 86 l 89 1 89 Dehnung (°/0) (DIN 53504).... 505 1 505 ! 380 455 385 420'405 Modul 300 % (kp/cm2)........ 72 505 69 62 65 58. 60 Shore-Härte (°A) (DIN 53504) 55 51 E 52'S3 52 51 ! 52 Elastizität (%) (DIN 53512) 58 60 62 60 58 58 60 Defohärte/Defoelastizität l I 80°C (DIN 53514)......... 575/27, 5 525125 800, 134, 5 600/24, 2 950, 37, 7 875/35,1 750/31 Rohfestigkeitsprüfung : Prüf- ! körper, frisch aufgehängt.... gerissen gerissen nach nach 1112Tagen 4 Tagen Längenänderung nach 7 Tagen -6% +10% -1% +10% -0,5% #0% #0% Mooney-Anvulkanisationbei 130'C (Minuten)........... 10, 3 10, 9 5, 4 11, 6 10,7 11, 2 11, 7 Die Ausführungsbeispiele zeigen, daß eine Vorvernetzung von gelfreie oder gelarme Kautschuke, insbesondere stereospezifische Kautschuke mit enger Molekulargewichtsverteilung enthaltenden Kautschukmischungen des erfindungsgemäß verwendeten Gemisches von chinoiden Verbindungen und Nitrosoverbindungen die Rohfestigkeit der Kautschuke in den Kautschukmischungen verbessert und daß diese Kautschukmischungen in ihrem Verarbeitungsverhalten reinen Naturkautschukmischungen angeglichen werden können. Durch die erfindungsgemäß hergestellte Vorvernetzung wird dem Kautschuk der Zustand verliehen, wie er dem Naturkautschuk nach der Mastikation eigentümlich ist. Mix No. 1 2 3 4 5 6 7 c) Ready mix (roller 50 ° C, running time 8 minutes) Sulfur ..................... 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Accelerator 1, 3 1,3 1, 3 1, 3 1, 15 1, 15 l 1, 15 Strength (cplcm2) (DIN 53504) 140 110 91 1 106 86 l 89 1 89 Elongation (° / 0) (DIN 53504) .... 505 1 505! 380 455 385 420,405 Module 300% (kp / cm2) ........ 72 505 69 62 65 58. 60 Shore hardness (° A) (DIN 53504) 55 51 E 52'S3 52 51! 52 Elasticity (%) (DIN 53512) 58 60 62 60 58 58 60 Defo hardness / defoelasticity l I 80 ° C (DIN 53514) ......... 575/27, 5 525 125 800, 134, 5 600/24, 2 950, 37, 7 875 / 35.1 750/31 Raw strength test: test! body, freshly hung up .... torn torn after after 1112 days 4 days Change in length after 7 days -6% + 10% -1% + 10% -0.5% # 0% # 0% Mooney scorch at 130'C (minutes) ........... 10, 3 10, 9 5, 4 11, 6 10.7 11, 2 11, 7 The exemplary embodiments show that pre-crosslinking of gel-free or low-gel rubbers, in particular rubber mixtures containing stereospecific rubbers with a narrow molecular weight distribution, of the mixture of quinoid compounds and nitroso compounds used according to the invention improves the raw strength of the rubbers in the rubber mixtures and that the processing behavior of these rubber mixtures can be brought into line with pure natural rubbers . The pre-crosslinking produced according to the invention gives the rubber the state that is peculiar to natural rubber after mastication.

Claims (3)

Patentansprüche : l. Verfahren zur Verbesserung der Rohfestigkeit von gelfreie oder gelarme Synthesekautschuke mit enger Molekulargewichtsverteilung enthaltenden Kautschukmischungen durch Vorvernetzung der Synthesekautschuke oder diese enthaltenden Kau- tschukmischungen unter Wärmebehandlung zwischen 50 und 200°C in Gegenwart von Dinitrosoverbindungen vor dem Zusatz der Vulkanisationsmittel, dadurch gekennzeichnet, daß man zusätzlich Chinone oder in der Wärme zu chinoiden Verbindungen führende Substanzen verwendet. Claims: l. Process for improving the raw strength of gel-free or low-gel synthetic rubbers with a narrow molecular weight distribution containing rubber mixtures by pre-crosslinking the synthetic rubbers or chews containing these chuk mixes with heat treatment between 50 and 200 ° C in the presence of dinitroso compounds before adding the vulcanizing agents, characterized in that quinones are added to quinones or in the heat Compounds leading substances used. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Gemisch aus p-Chinondioxin und N-Methyl-N, 4-dinitrosoanilin in einem Mengenanteil zwischen 0, 1 und 0,3 Gewichtsprozent, bezogen auf den Kautschukgehalt der Mischung verwendet wird und das Mengenverhältnis zwischen p-Chinondioxim und N-Methyl-N, 4-dinitrosoanilin zwischen 1 : 5 und 1 : 30 im Gemisch liegt. 2. The method according to claim 1, characterized in that a mixture from p-quinone dioxine and N-methyl-N, 4-dinitrosoaniline in a proportion between 0, 1 and 0.3 percent by weight, based on the rubber content of the mixture, are used and the quantitative ratio between p-quinonedioxime and N-methyl-N, 4-dinitrosoaniline between 1: 5 and 1:30 in the mixture. 3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Gemisch oder eine Komponente des Gemisches in feiner Verteilung eine Komponente des Gemisches in feiner Verteilung auf aktiven oder inaktiven Füllstoffen als Trägersubstanzen den Kautschukmischungen bzw. dem anderen Gemischanteil zugesetzt wird. 3. The method according to claims 1 and 2, characterized in that that the mixture or a component of the mixture is a finely divided component of the mixture in fine distribution on active or inactive fillers as carrier substances is added to the rubber mixtures or the other mixture portion.
DE19681770315 1968-05-02 1968-05-02 Process for improving the raw strength of rubber mixtures containing gel-free or low-gel synthetic rubbers Pending DE1301499B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19681770315 DE1301499B (en) 1968-05-02 1968-05-02 Process for improving the raw strength of rubber mixtures containing gel-free or low-gel synthetic rubbers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681770315 DE1301499B (en) 1968-05-02 1968-05-02 Process for improving the raw strength of rubber mixtures containing gel-free or low-gel synthetic rubbers

Publications (1)

Publication Number Publication Date
DE1301499B true DE1301499B (en) 1969-08-21

Family

ID=5700471

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19681770315 Pending DE1301499B (en) 1968-05-02 1968-05-02 Process for improving the raw strength of rubber mixtures containing gel-free or low-gel synthetic rubbers

Country Status (1)

Country Link
DE (1) DE1301499B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB874076A (en) * 1955-10-27 1961-08-02 Monsanto Chemicals Modification of rubbery copolymers
US3085990A (en) * 1961-01-24 1963-04-16 Monsanto Chemicals Heat treating rubbers with dinitrosoresorcinol
GB970473A (en) * 1961-02-13 1964-09-23 Monsanto Co Dinitroso derivatives of arylaminopropionitriles and modification of rubber polymerstherewith
US3264254A (en) * 1956-06-11 1966-08-02 Monsanto Co Reacting vulcanizable elastomers with dinitrosoanilines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB874076A (en) * 1955-10-27 1961-08-02 Monsanto Chemicals Modification of rubbery copolymers
US3264254A (en) * 1956-06-11 1966-08-02 Monsanto Co Reacting vulcanizable elastomers with dinitrosoanilines
US3085990A (en) * 1961-01-24 1963-04-16 Monsanto Chemicals Heat treating rubbers with dinitrosoresorcinol
GB970473A (en) * 1961-02-13 1964-09-23 Monsanto Co Dinitroso derivatives of arylaminopropionitriles and modification of rubber polymerstherewith

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