AT16376B - Process for increasing the absorption capacity of wood for dyes. - Google Patents

Process for increasing the absorption capacity of wood for dyes.

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Publication number
AT16376B
AT16376B AT16376DA AT16376B AT 16376 B AT16376 B AT 16376B AT 16376D A AT16376D A AT 16376DA AT 16376 B AT16376 B AT 16376B
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Austria
Prior art keywords
wood
dyes
absorption capacity
increasing
trunk
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German (de)
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Horak & Lewin Commandit Ges Fu
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Application filed by Horak & Lewin Commandit Ges Fu filed Critical Horak & Lewin Commandit Ges Fu
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Publication of AT16376B publication Critical patent/AT16376B/en

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  • Chemical And Physical Treatments For Wood And The Like (AREA)

Description

  

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   Österreichische PATENTSCHRIFT Nr. 16376. 



   HORAK &   LEWIN, COMMANDIT-GESELLSCHAFT   FÜR   tOLZIMPRÄGNIERUNG UND   HOLZFÄRBEREI IN WIEN. 



   Verfahren zur Erhöhung der Aufnahmsfähigkeit von Holz für Farbstoffe. 



   Das den Gegenstand der vorliegenden Erfindung bildende Verfahren bezweckt eine Erhöhung der   Aufnahmsfäbigkeit   der Holzfaser für die auf beliebige bekannte Art in das zu färbende Holz eingepressten Farbstoffe unter gleichzeitiger Steigerung der   Lichtbestän-   digkeit der erzeugten Färbungen.

   Seinem Wesen nach besteht dieses Verfahren darin, dass in dem zu färbenden Stammholze oder der beliebig verschnittenen   Ho ! zware, nachdem   die Holzzellen derselben vorher in bekannter Weise durch Behandeln mit überhitztem Dampfe aufgeschlossen worden sind, die Substanz der   Zellwände als   solche einem Pergamentierungsprozess mittelst Schwefelsäure unterworfen und dadurch chemisch derart verändert wird, dass sie die Fähigkeit erlangt, Farbstoffe aus ihren Lösungen ebenso begierig aufzunehmen   bezw.   in Form von beständigen Verbindungen festzuhalten, wie dies die tierischen Membranen oder Faserstoffe   (Pergament,     Schafwolle,   Seide) tun. 



   Behufs praktischer Durchführung des vorstehend gekennzeichneten Verfahrens wird zunächst in üblicher Weise in das zu färbende Stammholz oder die verschnittene Holzware überhitzter Wasserdampf eingetrieben, um die Holzfasern aufzuschliessen und eine   Lcckctung   der die Faserbündel   einhüllenden   inkrustierenden und harzigen Substanzen   herbeizuführen, weich letztere   die Affinität der Zellulose zu Farbstoffen in hohem Masse beeinträchtigen.

   Nach erfolgtem Dämpfen wird nun der Erfindung gemäss in das Holz 
 EMI1.1 
 Vorbehandlung gelockerten inkrustierenden und harzigen Substanzen gänzlich zerstört, andererseits aber die blossgelegten Zellulosefasern des Holzes pergamentiert bezw. an ihrer Oberfläche derart verändert werden, dass sie mit dem nachträglich zuzuführenden Farbstoffe glatt und sicher die gewünschten stabilen, lichtechten Färbungen geben. Nach erfolgter   Überführung   der   Zellulosefasern   in den genannten Zustand wird die in der Holzmasse vorhandene Schwefelsäure neutralisiert, was zweckmässig dadurch geschieht, dass man in den   Holzstamm   eine verdünnte Alkalilösung beliebiger bekannter Art einführt ; die hiebei entstehende Salzmasse lässt sich durch Auslaugen mit Wasser entfernen. 



   Das in vorstehend beschriebener Weise behandelte Holz wird nun in üblicher Weise, d. h. durch Eindrücken der betreffenden   Farbstofflösung   in einen Hirnschnitt desselben 
 EMI1.2 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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   Austrian PATENT LETTER No. 16376.



   HORAK & LEWIN, COMMANDIT-GESELLSCHAFT FOR FAIRY IMPREGNATION AND WOOD DYEFINING IN VIENNA.



   Process for increasing the absorption capacity of wood for dyes.



   The method forming the subject of the present invention aims to increase the absorption capacity of the wood fiber for the dyes pressed into the wood to be colored in any known manner, while at the same time increasing the lightfastness of the colorations produced.

   The essence of this process consists in the fact that in the trunk wood to be colored or the Ho! After the wood cells of the same have previously been opened up in a known manner by treatment with superheated steam, the substance of the cell walls as such is subjected to a parchment process using sulfuric acid and is thereby chemically changed in such a way that it acquires the ability to absorb dyes from its solutions just as eagerly respectively to be held in the form of permanent connections, as do animal membranes or fibers (parchment, sheep's wool, silk).



   For the practical implementation of the above-described method, superheated steam is first driven in the usual way into the trunk wood to be dyed or the cut wood goods in order to break down the wood fibers and to cause the encrusting and resinous substances enveloping the fiber bundles to break down, the latter softens the affinity of the cellulose for dyes affect to a great extent.

   After steaming has taken place, according to the invention, the wood is now applied
 EMI1.1
 Pretreatment, loosened encrusting and resinous substances are completely destroyed, but on the other hand the exposed cellulose fibers of the wood are parchmented and / or. are changed on their surface in such a way that they give the desired stable, lightfast colorations smoothly and reliably with the colorants to be added subsequently. After the cellulose fibers have been converted into the stated state, the sulfuric acid present in the wood mass is neutralized, which is conveniently done by introducing a dilute alkali solution of any known type into the wood trunk; the resulting salt mass can be removed by leaching with water.



   The wood treated in the manner described above is now in the usual way, i. H. by pressing the dye solution in question into a brain section of the same
 EMI1.2
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Erhöhung der Aufnahmsfähigkeit von Holz für Farbstoffe, dadurch EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process to increase the absorption capacity of wood for dyes, thereby EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT16376D 1902-01-13 1902-01-13 Process for increasing the absorption capacity of wood for dyes. AT16376B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT16376T 1902-01-13

Publications (1)

Publication Number Publication Date
AT16376B true AT16376B (en) 1904-05-25

Family

ID=3517707

Family Applications (1)

Application Number Title Priority Date Filing Date
AT16376D AT16376B (en) 1902-01-13 1902-01-13 Process for increasing the absorption capacity of wood for dyes.

Country Status (1)

Country Link
AT (1) AT16376B (en)

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