AT229482B - Process for the production of spinnable solutions of polyacrylonitrile - Google Patents
Process for the production of spinnable solutions of polyacrylonitrileInfo
- Publication number
- AT229482B AT229482B AT726861A AT726861A AT229482B AT 229482 B AT229482 B AT 229482B AT 726861 A AT726861 A AT 726861A AT 726861 A AT726861 A AT 726861A AT 229482 B AT229482 B AT 229482B
- Authority
- AT
- Austria
- Prior art keywords
- polyacrylonitrile
- production
- parts
- spinnable solutions
- solutions
- Prior art date
Links
- 229920002239 polyacrylonitrile Polymers 0.000 title 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 5
- 150000001447 alkali salts Chemical class 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 2
- VMSBGXAJJLPWKV-UHFFFAOYSA-N 2-ethenylbenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1C=C VMSBGXAJJLPWKV-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 239000004160 Ammonium persulphate Substances 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 235000019395 ammonium persulphate Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- UIIIBRHUICCMAI-UHFFFAOYSA-N prop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)CC=C UIIIBRHUICCMAI-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
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Als solche olefinisch ungesättigte Verbindungen können beispielsweise Acrylsäureester, Methacrylsäureester, Acrylamid, Methacrylamid, Methacrylnitril, Maleinsäureanhydrid, Vinylacetat, Äthylensulfonsäure und ihre Alkalisalze, Allylsulfonsäure und ihre Alkalisalze und Vinylbenzolsulfonsäure und ihre Alkalisalze genannt werden.
Die Menge an Persulfaten, vorzugsweise Ammonpersulfat, kann verhältnismässig gering gehalten werden. Sie kann gewöhnlich niedriger sein, als es der Menge, die im Polymerisattonsansatz löslich wäre, entspricht. Normalerweise kann mit 0, 005 Gew.-Teilen Ammonpersulfat pro Teil Acrylnitril das Auslangen gefunden werden, was den Vorteil mit sich bringt, dass sich die Lösungen wesentlich weniger verfärben als bei höherem Persulfatzusatz.
Da die Polymerisation gemäss der Erfindung in der kurzen Zeit von 1 bis 2 h zu Umsätzen von 80% und mehr führt, kann in den meisten Fällen der noch vorhandene Anteil an nicht umgesetztem Monomeren ohne Schaden für den Spinnprozess in der Lösung verbleiben. Sollte jedoch die Abtrennung des Monomeren erwünscht sein, so kann dies auf einfache Weise durch Vakuumdestillation geschehen.
Der für die Reaktion nötige Ausschluss von Sauerstoff kann auf übliche Weise durch Arbeiten in ver- schlossenen, völlig gefüllten Reaktionsbehältern oderunter Schutzgasatmosphäre erzielt werden.
Die in den Beispielen angegebenen Teile sind Gewichtsteile.
Beispiel 1 : In ein Gefäss werden 0, 025 Gew.-Teile Ammonpersulfat eingetragen. Das Gefäss wird anschliessend evakuiert, mit Stickstoff gespült und nochmals evakuiert. Nun wird das evakuierte Gefäss mit einer Lösung von 14 Teilen Äthylencarbonat, 5 Teilen Acrylnitril und 1 Teil Wasser beschickt, ohne
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Examples of such olefinically unsaturated compounds are acrylic acid esters, methacrylic acid esters, acrylamide, methacrylamide, methacrylonitrile, maleic anhydride, vinyl acetate, ethylene sulfonic acid and its alkali salts, allylsulfonic acid and its alkali salts, and vinylbenzenesulfonic acid and its alkali salts.
The amount of persulfates, preferably ammonium persulfate, can be kept relatively low. It can usually be less than the amount that would be soluble in the polymer batch. Normally, 0.005 parts by weight of ammonium persulphate per part of acrylonitrile will suffice, which has the advantage that the solutions are much less discolored than with higher amounts of persulphate.
Since the polymerization according to the invention leads to conversions of 80% and more in the short time of 1 to 2 hours, in most cases the remaining amount of unreacted monomer can remain in the solution without damage to the spinning process. However, should it be desired to separate off the monomer, this can be done in a simple manner by vacuum distillation.
The exclusion of oxygen necessary for the reaction can be achieved in the usual way by working in closed, completely filled reaction vessels or under a protective gas atmosphere.
The parts given in the examples are parts by weight.
Example 1: 0.025 parts by weight of ammonium persulfate are introduced into a vessel. The vessel is then evacuated, flushed with nitrogen and evacuated again. Now the evacuated vessel is charged with a solution of 14 parts of ethylene carbonate, 5 parts of acrylonitrile and 1 part of water, without
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT726861A AT229482B (en) | 1961-09-27 | 1961-09-27 | Process for the production of spinnable solutions of polyacrylonitrile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT726861A AT229482B (en) | 1961-09-27 | 1961-09-27 | Process for the production of spinnable solutions of polyacrylonitrile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT229482B true AT229482B (en) | 1963-09-25 |
Family
ID=3594328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT726861A AT229482B (en) | 1961-09-27 | 1961-09-27 | Process for the production of spinnable solutions of polyacrylonitrile |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT229482B (en) |
-
1961
- 1961-09-27 AT AT726861A patent/AT229482B/en active
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