AT32199B - Process for the production of an elastic material from raw rubber of the Sapotaceae. - Google Patents

Process for the production of an elastic material from raw rubber of the Sapotaceae.

Info

Publication number
AT32199B
AT32199B AT32199DA AT32199B AT 32199 B AT32199 B AT 32199B AT 32199D A AT32199D A AT 32199DA AT 32199 B AT32199 B AT 32199B
Authority
AT
Austria
Prior art keywords
raw rubber
sapotaceae
elastic material
production
rubber
Prior art date
Application number
Other languages
German (de)
Original Assignee
British Murac Syndicate Ltd
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 British Murac Syndicate Ltd filed Critical British Murac Syndicate Ltd
Application granted granted Critical
Publication of AT32199B publication Critical patent/AT32199B/en

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  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Description

  

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 EMI1.1 
 



   Vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines elastischen Materials aus   Rohgummi   des Sapota   Mimusops, welcher   in Brasilien, Guiana und Venezuela vorkommt oder des Sapota   Chrysophyllum   aus Queensland und Neu-SUd-Wales oder des Sapota Müelleri oder Gemischen derselben. 



   Dieses Produkt wird nach der Erfindung aus den erwähnten Rohgummis durch Waschen und Erhitzen in aufeinanderfolgenden Alkalisalzbädern und darauf folgendes Reinigen, Kneten und Trocknen der erhaltenen Masse gewonnen. 



   Das dadurch gewonnene Produkt ist homogen, sehr zäh und besitzt Eigenschaften 
 EMI1.2 
 



   Nach einer Ausführungsform des vorliegenden Verfahrens wird der Rohgummi zu-   nächst   geschnitten oder besser fein gemahlen und der Hast, der Sand oder anderes fremde Material durch Waschen in Wasser entfernt. Der gereinigte Rohgummi wird darauf in ein 
 EMI1.3 
 



  Dieses Bad wird für ungefähr eine Stunde auf dem Siedepunkt gehalten, bis der Roh-   gummi   braun und   fädig   wird. Hienach wird die   Kaliumnitratlösung   abgezogen und der   Hohgummi   in ein Bad gebracht, das aus einer Lösung von fünf Teilen von Natrium- oder Kaliumsilikat, Kalium- oder Natriumborat oder Kalium- oder Natriumwolframat in   loo Teilen   Wasser besteht, wobei jedoch die erstgenannten Silikate vorgezogen werden. Zur Bereitung 
 EMI1.4 
 der Zähigkeit und anderer Eigenschaften des   Produktes geändert werden. Dasselbe gilt   auch von den Konzentrationen der Bäder.

   Dub zweite Bad wird   während l Stunde bis   1 Stunde   15     Minuten im Kochen erhalten und   darauf von dem   Gummi abgezogen. Der     Gummi   besitzt dann eine rote Farbe und ist in heissem Zustande schleimig, wird beim   Kühlen jedoch zäh.   



     Der Gummi   wird dann für ungefähr eine Stunde in   heisse Kalkmilch übertragen,   welche aus   f@nf Teilen Kalziumoxyd   und 100 Teilen Wasser besteht. Dadurch wird der Gummibeträchtlichzäher. 



     Der nächste Teil des Prozesses besteht   in dem Waschen des   Gummis     in fliessendem   
 EMI1.5 
 Kalander in dünne Scheiben gewalzt werden. Diese dünnen Scheiben werden darauf in einer   warmen   Atmosphäre getrocknet, wobei heisse Luftströme über die dünnen Scheiben überleitet werden können. In manchen Fällen können die Scheiben vor dem Trocknen unmittelbar nach dem Kneten in schwache Salpeter- oder Essig- oder Zitronensäurelösung getaucht 
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   The present invention relates to a method for producing an elastic material from raw rubber of the Sapota Mimusops, which occurs in Brazil, Guiana and Venezuela, or the Sapota Chrysophyllum from Queensland and New South Wales or the Sapota Müelleri or mixtures thereof.



   According to the invention, this product is obtained from the aforementioned raw rubbers by washing and heating in successive alkali salt baths and then cleaning, kneading and drying the mass obtained.



   The product obtained is homogeneous, very tough and has properties
 EMI1.2
 



   According to one embodiment of the present method, the raw rubber is first cut or, better, finely ground, and the haste, sand or other foreign material is removed by washing in water. The cleaned raw rubber is then turned into a
 EMI1.3
 



  This bath is kept at the boiling point for about an hour until the raw rubber turns brown and threadbare. The potassium nitrate solution is then drawn off and the hollow rubber is placed in a bath consisting of a solution of five parts of sodium or potassium silicate, potassium or sodium borate or potassium or sodium tungstate in 100 parts of water, although the first-mentioned silicates are preferred. For preparation
 EMI1.4
 the toughness and other properties of the product can be changed. The same also applies to the concentrations of the baths.

   The second bath is kept boiling for 1 hour to 1 hour 15 minutes and is then removed from the rubber. The rubber then has a red color and is slimy when hot, but becomes tough when cooled.



     The gum is then transferred for about an hour into hot milk of lime, which consists of five parts of calcium oxide and 100 parts of water. This makes the rubber considerably tougher.



     The next part of the process consists of washing the gum in flowing
 EMI1.5
 Calenders are rolled into thin slices. These thin slices are then dried in a warm atmosphere, with hot air currents being conducted over the thin slices. In some cases, the slices can be dipped in weak nitric, acetic or citric acid solution immediately after kneading before drying
 EMI1.6


 

Claims (1)

EMI2.1 EMI2.1
AT32199D 1906-06-25 1906-06-25 Process for the production of an elastic material from raw rubber of the Sapotaceae. AT32199B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT32199T 1906-06-25

Publications (1)

Publication Number Publication Date
AT32199B true AT32199B (en) 1908-03-10

Family

ID=3547208

Family Applications (1)

Application Number Title Priority Date Filing Date
AT32199D AT32199B (en) 1906-06-25 1906-06-25 Process for the production of an elastic material from raw rubber of the Sapotaceae.

Country Status (1)

Country Link
AT (1) AT32199B (en)

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