DE937556C - Process for the production of high molecular weight sulfur-containing condensation products with an ether-like structure - Google Patents

Process for the production of high molecular weight sulfur-containing condensation products with an ether-like structure

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Publication number
DE937556C
DE937556C DEK18938A DEK0018938A DE937556C DE 937556 C DE937556 C DE 937556C DE K18938 A DEK18938 A DE K18938A DE K0018938 A DEK0018938 A DE K0018938A DE 937556 C DE937556 C DE 937556C
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Prior art keywords
molecular weight
high molecular
ether
production
condensation products
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DEK18938A
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German (de)
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Hans-Egon Dipl-Ing Dr Krueger
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Individual
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)

Description

Verfahren zur Herstellung von hochmolekularen schwefelhaltigen Kondensationsprodukten ätherartiger Struktur Es ist bekannt, als Weichmacher für Superpolyamide ein Kondensationsprodukt aus zweiwertigen schwefelhaltigen Alkoholen und mehrwertigen Alkoholen zu verwenden. Derartige hochmolekulare schwefelhaltige Kondensationsprodukte von ätherartiger Struktur sollen dabei durch Erhitzen der genannten Komponenten in Gegenwart von Verätherungskatalysatoren erhalten werden. Nähere Angaben über die Herstellung dieser Polyät'herharze ;sind jedoch nicht bekanntgeworden.Process for the production of high molecular weight, sulfur-containing condensation products ethereal structure It is known to be a condensation product as a plasticizer for superpolyamides to use from dihydric sulphurous alcohols and polyhydric alcohols. Such high molecular weight sulfur-containing condensation products of ethereal Structure should be achieved by heating the components mentioned in the presence of Etherification catalysts are obtained. More details about the manufacture of these Polyether resins; however, have not become known.

Kondensiert man zweiwertige schwefelhaltige Alkohole mit mehrwertigen Alkoholen bei höheren Temperaturen in üblicher Weise, so erhält man sehr zähe, unlösliche und unschrnelzbare Massen, die als Weichmacher für die gemannten Polykondensate völlig ungeeignet sind. Es ist wahrscheinlich, daß infolge der Teilnahme von mehrwertigen: Verbindungen unter den Bedingungen der Kondensationsreaktion vernetzte Produkte mit den vorbeschriebenen Eigenschaften gebildet werden.If dihydric alcohols containing sulfur are condensed with polyhydric ones Alcohols at elevated temperatures in the usual way, very viscous, insoluble ones are obtained and non-shrinkable masses that act as plasticizers for the mixed polycondensates are completely unsuitable. It is likely that as a result of the participation of polyvalent: Compounds products crosslinked under the conditions of the condensation reaction are formed with the properties described above.

Es wurde nun gefunden., daß man in organischen. Lösungsmitteln noch lösliche Polyätherharze erhält, wenn man Thiodiglykol mit Pentaerythrit in einem ungefähren Verhältnis von q. : i Mol unter Verwendung eines Katalysators so lange erhitzt, bis eine Probe von i g des Reaktionsgemisches, gelöst. in 5 ccm Äthanol (96o/oig), gerade eine nicht mehr mit Wasser verschwindende Trübung zeigt.It has now been found that in organic. Solvents still Soluble polyether resins are obtained by combining thiodiglycol with pentaerythritol in one approximate ratio of q. : i moles using a catalyst as long heated until a sample of i g of the reaction mixture, dissolved. in 5 cc of ethanol (96%), just a cloudiness that no longer disappears with water shows.

Als Katalysator kann beispielsweise p-Toluolsulfonsäure dienen.For example, p-toluenesulfonic acid can serve as a catalyst.

Die zweckmäßig bei einer Temperatur von 13o° vorzunehmende Kondensation ist zu dem bereits erwähnten Zeitpunkt abzubrechen, um zu verhindern, daB unter einer weitgehenden Abspaltung von Wasser und wahrscheinlich dadurch bedingte Vernetzung unlösliche und unschmelzbare Massen erhalten werden.The condensation expediently to be carried out at a temperature of 130 ° is to be canceled at the point in time already mentioned in order to prevent the under extensive elimination of water and the cross-linking that is probably caused by it insoluble and infusible masses are obtained.

Der Zeitpunkt, an dem .die Reaktion durch Abkühlung unterbrochen werden muß, ist durch den »Trübungspunkt« festgelegt, der in folgender Weise bestimmt wird: In einem 25 ccm Erlenmeyerkolben wird eine Probe von i g des Reaktionsgemisches eingewogen und in genau 5 ccm Äthanol (96o/aig) gelöst. Dann wird aus einer Bürette so lange destilliertes Wasser zugegeben, bis eine entstehende Trübung nicht mehr verschwindet. D.ie verbrauchten Kuhikzentimeter werden äls Trübungspunkt; angegeben.The point in time at which the reaction is interrupted by cooling must is determined by the "cloud point", which is determined in the following way: A sample of 1 g of the reaction mixture is placed in a 25 cc Erlenmeyer flask weighed in and dissolved in exactly 5 cc of ethanol (96o / aig). Then a burette becomes Distilled water is added until the cloud no longer appears disappears. D. The cow cubic centimeters used are called the cloud point; specified.

Man bringt ein Gemisch aus i Mol Pentaerythrit, etwa 4 Mol Thiodiglykol und p-ToluolsulfonsäuTe als Katalysator unter ständigem Rühren auf eine Temperatur von 13o° C. Auf dieser Temperatur wird das Gemisch gehalten. Es ist zweckmäßig, das Rühren durch Einblasen von Luft zu unterstützen. Die gesamte Reaktionszeit, gerechnet von dem Zeitpunkt, an dem der Ansatz eine Temperatur von 13o° C erreicht hat, beträgt etwa 7 Stunden. Sobald die Temperatur von i25 bis 13o° erreicht ist, gerät das Reaktionsgut ins Sieden und die Mischung wird klar, da sich Pentaerythrit in dem heißen Thiodiglykol auflöst. Die Titration wird zweckmäßig nach 4 Stunden nach Erreichung der Temperatur von 13o° C begonnen und zunächst in Abständen von 30 Minuten, dann alle io Minuten, ausgeführt. Bei einem bestimmten Trübungspunkt, der davon abhängt, wie weit die Kondensation getrieben werden soll, wird das Erhitzen abgebrochen, weil sonst das Produkt, z. B. in den .für Superpolyamide verwendbaren Lösungsmitteln, wie z. B. wäßrige niedere Alkohole, wie Methanol, Äthanol, Tropanol und Gemischen dieser Alkohole mit Chlorkohlenwasserstoffen, unlöslich werden würde.A mixture of 1 mole of pentaerythritol, about 4 moles of thiodiglycol and p-toluenesulfonic acid as catalyst is brought to a temperature of 130 ° C. with constant stirring. The mixture is kept at this temperature. It is advisable to assist the stirring by blowing in air. The total reaction time, calculated from the point in time at which the batch has reached a temperature of 130 ° C., is about 7 hours. As soon as the temperature of 125 to 130 ° is reached, the reaction mixture boils and the mixture becomes clear, as pentaerythritol dissolves in the hot thiodiglycol. The titration is expediently started after 4 hours after the temperature of 130 ° C. has been reached and is carried out initially at intervals of 30 minutes and then every 10 minutes. At a certain cloud point, which depends on how far the condensation is to be driven, the heating is stopped because otherwise the product, e.g. B. in the. For super polyamides usable solvents such. B. aqueous lower alcohols such as methanol, ethanol, tropanol and mixtures of these alcohols with chlorinated hydrocarbons, would become insoluble.

Das fertige, als Weichmacher geeignete Polyätherharz stellt nach Abkühlung eine dunkelbraune, zähe Flüssigkeit dar. Die Säurezahl muB unter i liegen. Je nach den verwendeten Polykondensationsprodukten, die mit dem Polyätherharz weichgestellt werden sollen, ist im übrigen der Kondensationsgrad optimal vermittels des Trübungspunktes einstellbar.The finished polyether resin, suitable as a plasticizer, provides after cooling a dark brown, viscous liquid. The acid number must be below i. Depending on the polycondensation products used, which are softened with the polyether resin are to be, the degree of condensation is optimal by means of the cloud point adjustable.

_ _ Beispiel 541g Thiodiglykol und i5,5 kg Pentaerythrit werden unter Rühren auf i2o° erwärmt. Dann werden als Katalysator 2,5 kg p-Toluolsulfonsäure zugesetzt, und das Reaktionsgemisch wird auf 13o° C erhitzt. Bis zum Ende der Reaktion wird diese Temperatur eingehalten. Um das während der Reaktion gebildete Wasser schnell zu entfernen, wird ein Luftstrom durch das Reaktionsgemisch geleitet. Zur Bestimmung des Endpunktes der Reaktion wird in Abständen von 30 Minuten, später i o Minuten, der Trübungspunkt ermittelt. Bei einem Trübungspunkt von 5 bis 4,8 wird das Erhitzen abgebrochen und für möglichst schnelle Abkühlung gesorgt. Man erhält etwa 6o kg Polyätherharz._ _ Example 541 g of thiodiglycol and 15.5 kg of pentaerythritol are heated to 120 ° with stirring. 2.5 kg of p-toluenesulfonic acid are then added as a catalyst, and the reaction mixture is heated to 130.degree. This temperature is maintained until the end of the reaction. In order to quickly remove the water formed during the reaction, a stream of air is passed through the reaction mixture. To determine the end point of the reaction, the cloud point is determined at intervals of 30 minutes, later 10 minutes. When the cloud point is between 5 and 4.8, heating is stopped and the product is cooled as quickly as possible. About 60 kg of polyether resin are obtained.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von hochmolekularen schwefelhaltigen Kondensationsprodukten ätherartiger Struktur, dadurch gekennzeichnet, daß Thiodiglykol und Pentaerythrit in einem ungefähren Verhältnis von 4 zu i Mol unter Verwendung eines Katalysators so lange erhitzt werden, bis eine Probe von i g des Reaktionsgemisches, gelöst in 5 ccm Äthanol (96o/aig), bei Zusatz von destilliertem Wasser gerade eine nicht mehr mit Wasser verschwindende Trübung zeigt und der dem gewünschten Kondensationsgrad entsprechende Trübungspunkt erreicht ist. Angezogene Druckschriften: Deutsche Patentschrift Nr. 878 7i3.PATENT CLAIM: Process for the production of high molecular weight sulfur-containing Condensation products of ether-like structure, characterized in that thiodiglycol and using pentaerythritol in an approximate ratio of 4 to 1 mole of a catalyst are heated until a sample of i g of the reaction mixture, dissolved in 5 cc of ethanol (96o / aig), with the addition of distilled water just one Turbidity no longer disappears with water and shows the desired degree of condensation corresponding cloud point is reached. Referred publications: German patent specification No. 878 7i3.
DEK18938A 1953-07-26 1953-07-26 Process for the production of high molecular weight sulfur-containing condensation products with an ether-like structure Expired DE937556C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK18938A DE937556C (en) 1953-07-26 1953-07-26 Process for the production of high molecular weight sulfur-containing condensation products with an ether-like structure

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Application Number Priority Date Filing Date Title
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DE937556C true DE937556C (en) 1956-01-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054717B (en) * 1957-11-08 1959-04-09 Bayer Ag Process for the production of polyethers containing oxygen and sulfur atoms as bridge atoms

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878713C (en) * 1943-02-28 1953-06-05 Phrix Werke Ag Plasticizers for superpolyamides and processes for improving the mechanical properties of superpolyamides

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878713C (en) * 1943-02-28 1953-06-05 Phrix Werke Ag Plasticizers for superpolyamides and processes for improving the mechanical properties of superpolyamides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054717B (en) * 1957-11-08 1959-04-09 Bayer Ag Process for the production of polyethers containing oxygen and sulfur atoms as bridge atoms

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