DE865195C - Process to increase the viscosity of homogeneous, aqueous solutions of the alkali salts of cellulose glycol acids - Google Patents

Process to increase the viscosity of homogeneous, aqueous solutions of the alkali salts of cellulose glycol acids

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Publication number
DE865195C
DE865195C DES6312D DES0006312D DE865195C DE 865195 C DE865195 C DE 865195C DE S6312 D DES6312 D DE S6312D DE S0006312 D DES0006312 D DE S0006312D DE 865195 C DE865195 C DE 865195C
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DE
Germany
Prior art keywords
viscosity
homogeneous
alkali salts
cellulose
increase
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
DES6312D
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German (de)
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Sichel Werke AG
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Sichel Werke AG
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Publication date
Application filed by Sichel Werke AG filed Critical Sichel Werke AG
Priority to DES6312D priority Critical patent/DE865195C/en
Application granted granted Critical
Publication of DE865195C publication Critical patent/DE865195C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00Preparation of cellulose ethers
    • C08B11/20Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00Preparation of cellulose ethers
    • C08B11/02Alkyl or cycloalkyl ethers
    • C08B11/04Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
    • C08B11/10Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals
    • C08B11/12Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals substituted with carboxylic radicals, e.g. carboxymethylcellulose [CMC]

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

Verfahren zur Erhöhung der Viscosität von homogenen, wäßrigen Lösungen der Alkalisalze von Celluloseglykolsäuren Wasserlösliche Cellulosederivate finden bekanntlich für die verschiedenartigsten Zwecke Verwendung. Diese Verwendungsmöglichkeiten beruhen hauptsächlich darauf, daß sie in Wasser zu kolloidalen, hochviscosen Lösungen aufquellen.Process for increasing the viscosity of homogeneous, aqueous solutions the alkali salts of cellulose glycolic acids Find water-soluble cellulose derivatives known to be used for the most varied of purposes. These uses are mainly based on the fact that they form colloidal, highly viscous solutions in water swell up.

Es wurde nun gefunden, daß man dieverquellung dieser Produkte in hohem Grade verbessern kann, wenn man die Lösungen der intensiven mechanischen Behandlung von Homogenisiermaschinen unterwirft. Als besonders geeignet haben sich für diese Behandlung die Alkalisalze von Celluloseglykolsäuren erwiesen. It has now been found that the swelling of these products in can greatly improve in using the solutions of intensive mechanical treatment Subjected by homogenizers. Have proven to be particularly suitable for this Proven treatment of the alkali salts of cellulose glycolic acids.

Für das vorliegende Verfahren eignen sich Homogenisiermasehinen jeglicher Art. Zweckmäßigerweise benutzt man Iiolloidmuhlen, bei denen die Lösung der Zentrifugalkraft einer sich mit hoher Geschwindigkeit drehenden Scheibe (Rotor) ausgesetzt wird, oder Homogenisiermaschinen, bei denen die Lösung unter hohem Druck durch enge Kanäle, Spalten u. dgl. hindurchgeschleudert wird. Any homogenizing machines are suitable for the present method Art. Appropriately one uses Iiolloidmühlen, in which the solution of the centrifugal force is exposed to a disc (rotor) rotating at high speed, or homogenizing machines, in which the solution under high pressure through narrow channels, Is thrown through cracks and the like.

Löst man die erwähnten, in bekannter Weise hergestellten Cellulosederivate in Wasser und unterwirft sie der Wirkung der Homogenisiermaschinen, so erhält man überraschenderweise Lösungen von außerordentlich hoher Viscosität. Die Viscosität kann dabei so stark zunehmen, daß schließlich dicke Gallerten entstehen. Die so behandelten Lösungen besitzen ferner erhöhte Klebkraft und zeichnen sich durch besondere Klarheit aus, da sie frei von unvollkommen verquollenen Teilchen sind. Sie können also besonders da verwendet werden, wo es auf hohe Viscosität und Klarheit der Lösung ankommt, insbesondere zum Schlichten von Garnen und Appretieren von Geweben. Die auf gewöhnlichem Wege hergestellten Lösungen besitzen dagegen immer einen mehr oder weniger großen Anteil an unvollkommen verquollenen Teilchen; verarbeitet man stark verdünnte Lösungen, so setzen sich diese Teilchen ab und geben leicht zu Störungen Veranlassung. Die verfahrensgemäß hergestellten Lösungen zeigen dagegen diese Nachteile nicht. If the cellulose derivatives mentioned, prepared in a known manner, are dissolved in water and subjecting them to the action of the homogenizing machines, one obtains Surprisingly, solutions of extremely high viscosity. The viscosity can increase so much that eventually thick jellies develop. The so treated solutions also have increased adhesive strength and draw are distinguished by their particular clarity, since they are free from imperfectly swollen particles are. They can therefore be used especially where there is a need for high viscosity and Clarity of the solution matters, especially when it comes to sizing yarns and finishing of tissues. The solutions produced in the usual way, however, always have a more or less large proportion of imperfectly swollen particles; processed if you use very dilute solutions, these particles settle and give off easily cause disruptions. The solutions produced according to the method show against it these disadvantages do not.

Dlie homogenisierten Lösungen können aber auch für andere Zwecke Verwendung finden, z. B. als Gelier- und Verdickungsmittel jeglicher Art, als Klebstoffe, Farbenbindemittel und für viele andere Zwecke, für die man bisher Celluloseester und Celluloseäther verwendet hat. Die Ceflulosederivate können für sich oder im Gemisch mit anderen Kolloiden (Eiweißstoffe, Stärke, Gummi, Seifen u. dgl.) und Füllstoffen homogenisiert werden. The homogenized solutions can also be used for other purposes Find use, e.g. B. as gelling and thickening agents of any kind, as adhesives, Color binders and for many other purposes for which cellulose esters were previously used and used cellulose ethers. The ceflulose derivatives can stand alone or in Mixture with other colloids (proteins, starch, gums, soaps, etc.) and Fillers are homogenized.

Beispiel 100 g eines Natriumsalzes der Celluloseglykolsäure, in bekannter Weise hergestellt durch Einwirken von Monochioressigsäure auf Alkalicellulose, werden in 4 kg kaltem Wasser aufgelöst. Example 100 g of a sodium salt of cellulose glycolic acid, in known Way produced by the action of monochioracetic acid on alkali cellulose dissolved in 4 kg of cold water.

Nach dem vollständigen Verquellen erhält man eine leicht flüssige Lösung. Diese wird durch eine Scheibenkolloidmühle, deren Rotor eine-- Umdrehungsgeschwindigkeit von etwa 4000 bis 5000 besitzt gegeben. Nach kurzem Stehen erstarrt die Lösung zu einer dicken Gallerte. After the swelling is complete, a slightly liquid one is obtained Solution. This is done by a disc colloid mill, the rotor of which has a speed of rotation from about 4000 to 5000 possesses given. After standing for a short time, the solution solidifies a thick jelly.

Man hat bereits vorgeschlagen, Celluloseester und solche Alkylcellulose, die in Wasser und wäßrigen Alkalien unlöslich sind und sich erst bei Temperaturen unter o° in wäßrigen Alkalien auflösen, in KoLloidmühlen zu behandeln. Bei diesem Vorschlag handelt es sich jedoch darum, daß unvollkommen gelöste Massen in Kolloidmühlen behandelt werden. D'emgegenüber besteht das Ausgangsmaterial gemäß vorliegender Erfindung aus homogenen Lösungen. Diese homogenen Lösungen werden, und darin besteht das Neue der vorliegenden Erfindung, durch die Behandlung in Koiloidmthlen in dicke Gallerten umgewandelt. Dies ist völlig überraschend, und zwar insbesondere deshalb, weil bekanntlich die Behandlung von kolloiden Lösungen in Kolloidmühlen eine Verflüssigung, d. h. eine Viscositätserniedrigung, im Gefolge hat. It has already been proposed to use cellulose esters and such alkyl cellulose, which are insoluble in water and aqueous alkalis and only dissolve at temperatures Dissolve in aqueous alkalis under o °, treat in colloid mills. With this one However, the suggestion is that imperfectly dissolved masses in colloid mills be treated. In contrast, there is the starting material according to the present invention Invention from homogeneous solutions. These homogeneous solutions are, and consist in the novelty of the present invention, due to the treatment in Koiloidmühlen in thick Jelly transformed. This is completely surprising, especially because because it is well known that the treatment of colloid solutions in colloid mills leads to liquefaction, d. H. a decrease in viscosity, as a result.

PATNTANSPRUCH: Verfahren zur Erhöhung der Viscosität von homogenen, wäßrigen Lösungen der Alkalisalze von Celluloseglykolsäuren, dadurch gekennzeichnet, daß man die Lösungen einer mechanischen Behandlung mittels Homogenisiermaschinen unterwirft. PATENT CLAIM: Process for increasing the viscosity of homogeneous, aqueous solutions of the alkali salts of cellulose glycolic acids, characterized in that that the solutions of a mechanical treatment by means of homogenizing machines subject.

Claims (1)

Angezogene Druckschriften: Kolloidchemisches Beiheft, Bd. Ig, S. I53/I54; Kolloidzeitschrift, Bd. 45, S. 266/267; Bd. 39, S. 88/wo; Bd. 98; I9412, S. 348/352. Cited publications: Colloidchemisches Beiheft, Vol. Ig, p. I53 / I54; Kolloidzeitschrift, Vol. 45, pp. 266/267; Vol. 39, p. 88 / where; Vol. 98; I9412, Pp. 348/352.
DES6312D 1939-08-26 1939-08-26 Process to increase the viscosity of homogeneous, aqueous solutions of the alkali salts of cellulose glycol acids Expired DE865195C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES6312D DE865195C (en) 1939-08-26 1939-08-26 Process to increase the viscosity of homogeneous, aqueous solutions of the alkali salts of cellulose glycol acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES6312D DE865195C (en) 1939-08-26 1939-08-26 Process to increase the viscosity of homogeneous, aqueous solutions of the alkali salts of cellulose glycol acids

Publications (1)

Publication Number Publication Date
DE865195C true DE865195C (en) 1953-01-29

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DES6312D Expired DE865195C (en) 1939-08-26 1939-08-26 Process to increase the viscosity of homogeneous, aqueous solutions of the alkali salts of cellulose glycol acids

Country Status (1)

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DE (1) DE865195C (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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