DE869123C - Process for polymerizing vinyl fluoride - Google Patents
Process for polymerizing vinyl fluorideInfo
- Publication number
- DE869123C DE869123C DEB7581D DEB0007581D DE869123C DE 869123 C DE869123 C DE 869123C DE B7581 D DEB7581 D DE B7581D DE B0007581 D DEB0007581 D DE B0007581D DE 869123 C DE869123 C DE 869123C
- Authority
- DE
- Germany
- Prior art keywords
- vinyl fluoride
- polymerizing vinyl
- fluoride
- polymerization
- polymerizing
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F14/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F14/18—Monomers containing fluorine
- C08F14/20—Vinyl fluoride
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerisation Methods In General (AREA)
Description
Verfahren zum Polymerisieren von Vinylfluorid Vinylfluorid ist sehr polymerisationsträge und läßt sich nach bekannten Polymerisationsverfahren, d. h. für sich allein oder in Gegenwart von Lösungsmitteln und auch in Emulsion, nicht oder nur zu einem sehr geringen Teil polymerisieren. Die erhaltenen Polymerisate besitzen zudem einen sehr niedrigen Polymerisationsgrad.Method of Polymerizing Vinyl Fluoride Vinyl fluoride is very polymerisation slow and can be according to known polymerisation processes, d. H. on its own or in the presence of solvents and also in emulsion, not or polymerize only to a very small extent. The polymers obtained also have a very low degree of polymerization.
Es wurde nun gefunden, daß man Vinylfluorid mit einer Ausbeute von bis zu etwa 50% polymerisieren kann, wenn man die Polymerisation in wäßriger Emulsion unter Verwendung saurer Emulgatoren vornimmt. Als solche -Emulgiermittel, die das Vinylfluorid unter Bildung beständiger Emulsionen zu emulgieren vermögen, seien insbesondere Fettsäuren, vorzugsweise die durch Paraffinoxydation erhaltenen Fettsäuren, und auch Kondensationsprodukte aus ß, ß'-Dichlordiäthyläther und hochmolekularen Aminen, die aus den bei der Paraffinoxydation erhältlichen Fettsäuren über die Nitrile erhältlich sind, genannt. Bei der Polymerisation scheidet sich das Polymerisat ab. Es kann vom anhaftenden Emulgator und sonstigen Begleitstoffen durch Waschen mit Methanol und Wasser leicht befreit werden. Das Polyvinylfluorid ist in den meisten Lösungsmitteln unlöslich, es löst sieh jedoch beispielsweise in Cyclohexanon und Tetrahydrofuran. -Die Polymerisation des Vinylfluorids bei Temperaturen oberhalb 50° unter Drücken oberhalb Zoo Atm. wird hier nicht beansprucht.It has now been found that you can vinyl fluoride with a yield of Can polymerize up to about 50% if the polymerization is carried out in an aqueous emulsion using acidic emulsifiers. As such -emulsifiers that the Vinyl fluoride capable of emulsifying to form stable emulsions, are in particular fatty acids, preferably the fatty acids obtained by paraffin oxidation, and also condensation products from ß, ß'-dichlorodiethyl ether and high molecular weight Amines, which are obtained from the fatty acids obtained by paraffin oxidation via the nitriles are available, called. The polymer separates out during the polymerization. It can be removed from the adhering emulsifier and other accompanying substances by washing with Methanol and water are easily freed. The polyvinyl fluoride is insoluble in most solvents, but it dissolves, for example in cyclohexanone and tetrahydrofuran. -The polymerization of vinyl fluoride at temperatures above 50 ° under pressures above Zoo Atm. is not claimed here.
- Beispiel In einen 3;5-1-Autoklav aus Edelstahl werden 30 g durch Paraffinoxydation erhaltene Fettsäure, 2 g Natriumhydrosulfit und i2oo g Wasser gefüllt, und das Gemisch wird i Stunde lang gerührt. Dann werden 301 g Kaliumpersulfat zugegeben und 7oo g verflüssigtes Vinylfluorid eingepreßt. D'as Ganze wird dann 70 Stunden auf 5o bis 7,d°' unter Rühren erwärmt. Es stellt sich ein Druck von etwa SoAtm. ein. Man erhält etwa - o2o g Polyvinylfluorid mit einem Fluorgehalt von 37,5 °1o und einem K-Wert von 40 (in Cyclohexanon oder Tetrahydrofuran gemessen), während der Rest des Vinylfluorids unverändert zurückgewonnen wird. - Example 30 g of fatty acid obtained by paraffin oxidation, 2 g of sodium hydrosulphite and 100 g of water are placed in a 3; 5-1 autoclave made of stainless steel, and the mixture is stirred for one hour. 301 g of potassium persulfate are then added and 700 g of liquefied vinyl fluoride are pressed in. The whole is then heated to 50 to 7, d ° ' for 70 hours while stirring. There is a pressure of about SoAtm. a. About -O2o g of polyvinyl fluoride with a fluorine content of 37.5 ° 10 and a K value of 40 (measured in cyclohexanone or tetrahydrofuran) are obtained, while the rest of the vinyl fluoride is recovered unchanged.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB7581D DE869123C (en) | 1941-12-31 | 1941-12-31 | Process for polymerizing vinyl fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB7581D DE869123C (en) | 1941-12-31 | 1941-12-31 | Process for polymerizing vinyl fluoride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE869123C true DE869123C (en) | 1953-03-02 |
Family
ID=6955477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB7581D Expired DE869123C (en) | 1941-12-31 | 1941-12-31 | Process for polymerizing vinyl fluoride |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE869123C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE959060C (en) * | 1954-05-23 | 1957-02-28 | Bayer Ag | Process for the production of polymers finely divided in water from polymerizable fluorovinyl compounds or their copolymers |
| DE1720469B1 (en) * | 1967-04-18 | 1972-05-04 | Solvay Werke Gmbh | Process for the polymerization of vinyl fluoride |
-
1941
- 1941-12-31 DE DEB7581D patent/DE869123C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE959060C (en) * | 1954-05-23 | 1957-02-28 | Bayer Ag | Process for the production of polymers finely divided in water from polymerizable fluorovinyl compounds or their copolymers |
| DE1720469B1 (en) * | 1967-04-18 | 1972-05-04 | Solvay Werke Gmbh | Process for the polymerization of vinyl fluoride |
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