DE924896C - Process for shaping polymers of acrylonitrile and its copolymers - Google Patents
Process for shaping polymers of acrylonitrile and its copolymersInfo
- Publication number
- DE924896C DE924896C DEC5077A DEC0005077A DE924896C DE 924896 C DE924896 C DE 924896C DE C5077 A DEC5077 A DE C5077A DE C0005077 A DEC0005077 A DE C0005077A DE 924896 C DE924896 C DE 924896C
- Authority
- DE
- Germany
- Prior art keywords
- weight
- parts
- acrylonitrile
- copolymers
- nonsolvents
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
- C08J3/091—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids characterised by the chemical constitution of the organic liquid
- C08J3/095—Oxygen containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/18—Homopolymers or copolymers of nitriles
- C08J2333/20—Homopolymers or copolymers of acrylonitrile
Description
Verfahren zum Verformen von Polymeren des Acrylnitrils und seinen Mischpolymerisaten Zusatz zum Patent 892380 Das Patent 892 380 betrifft ein Verfahren zum Verformen von Polymeren des Acrylnitrils und seinen Mischpolymerisaten, gekennzeichnet durch die Verwendung von zyklischen Carbonaten. mehrwertiger aliphatischer Alkohole oder mehrwertiger Phenole als Lösunegs- und Weichmachungsmittel.Process for shaping polymers of acrylonitrile and its Copolymers additive to patent 892380 Patent 892,380 relates to a method for shaping polymers of acrylonitrile and its copolymers, marked through the use of cyclic carbonates. polyhydric aliphatic alcohols or polyhydric phenols as solvents and plasticizers.
Die in dem Patent 892 380 genannten Carbonate können auch in Mischung mit anderen geeigneten Lösungs- oder Weichmachungsmittelln zur Anwendung kommen. The carbonates mentioned in patent 892,380 can also be mixed be used with other suitable solvents or plasticizers.
In Erweiterung dieses Erfindungsgedankens wurde nunmehr gefunden, daß auch bestimmte Nichtlöser in Mischung mit dein im Hauptpatent genannten Carbonaten sich als Lösungs- und Weichmachungsmittel für Polyacrylnitril und seine Niiischpolymerisate eignen. Diese Nichtlöser sind dadurch gekennzeichnet, daß sie kein zur Wasserstoffbrückenbildung beifähigtes Wasserstoffatom besitzen. As an extension of this inventive concept, it has now been found that also certain nonsolvents mixed with the carbonates mentioned in the main patent as a solvent and plasticizer for polyacrylonitrile and its Niiischpolymerisate suitable. These nonsolvents are characterized by the fact that they do not lead to the formation of hydrogen bonds have a capable hydrogen atom.
Solche erfindungsgemäß verwendbaren Nicht -löser sind beispielsweise Ketone, Äther, Nitroverbindungen, halogensubstituierte Nitrile, Ester, Ameisensäure, Glykolsulfit und ähnliche. Examples of such nonsolvents which can be used according to the invention are Ketones, ethers, nitro compounds, halogen-substituted nitriles, esters, formic acid, Glycol sulfite and the like.
Durch diesen Zusatz von Nichtlösern läßt sich eine wesentliche Verbesserung der Lösefähigkeit der verwendeten Carbonate erreichen. Dieser Effekt ist - überraschend, da im allgemeinen durch Zusatz von Nichtlösern zu Lösungsmitteln deren Lösefähigkeit weitgehend herabgesetzt und meist sogar eine Ausfällung hervorgerufen wird. Durch das Verfahren läßt sich eine Einsparung der verhältnismäßig teueren Lösungsmittel des Hauptpatents erreichen, insbesondere da der Zusatz der Nichtlöser bis zu einem hohen Prozentsatz gesteigert werden kann.. Ein weiterer Vorteil beruht darin, daß die LösunFgstetmperatur herabgesetzt wird, so daß auch bei Zimmertemperatur nied.rig- bis mittelviskose Lösungen erhältlich sind. This addition of nonsolvents enables a substantial improvement achieve the solubility of the carbonates used. This effect is - Surprising, since generally by adding nonsolvents to solvents their solubility largely reduced and usually even caused a precipitation will. The method can save the relatively expensive Achieve solvents of the main patent, especially since the addition of the nonsolvents can be increased up to a high percentage .. Another benefit is based in that the solution temperature is lowered, so that also at room temperature low to medium viscosity solutions are available.
Diese Lösungsmittelkombinationen sin,d- blesonders zur Herstellung von Fasern nach dem Naßspinnverfahren geeignet. Als Fällbäder kom men wäßrige und nichtwäßrige Bäder in Frage, welche die Lösungsmittelgemische in. solcher Konzentration enthalten, daß gerade Ausfällung erfolgt. These solvent combinations are especially useful for production of fibers after the wet spinning process. As precipitation baths come aqueous and Non-aqueous baths in question, which contain the solvent mixtures in such a concentration contain that precipitation is currently taking place.
Die entsprechende IZon.zentration zur Ausfällung kann durch den nachträglichen Zusatz von Wasser oder anderen Stoffen konstant gehalten werden, um eine gleichmäßige Ausfällung zu gewährleisten.The corresponding IZon.zentration for the precipitation can be determined by the subsequent Addition of water or other substances must be kept constant in order to be even To ensure precipitation.
Eine Aufarbeitung der Fällbäder kann z. B. durch die Abdestillation des Wassers bei wäßrigen Fällbädern erfolgen, wenn als Zus;atzkomponente wasserlösliche Stoffe, die höher als Wasser sieden, benutzt werden.A work-up of the precipitation baths can, for. B. by distillation of the water in aqueous precipitation baths if the additive component is water-soluble Substances that boil higher than water are used.
Die nachfolgenden Beispiele dienen zur Erläuterung des Erfindungsgedankens, ohne jedoch den Umfang und die Art der Zusatzlösungsmittel zu beschränken. The following examples serve to explain the concept of the invention, without, however, restricting the scope and type of co-solvents.
Beispiel I Es wird eine Mischung von 34 GeAvichtsteilen Chloracetonitrill und 66 Gewichtsteilen Glykolcarbonat hergestellt. Hierin werden 10 Gewichtsteile Polyacrylnitril bei 55 bis 60° gelöst. Die Lösung ist bei Zimmertemperatur noch fließfähig. Example I A mixture of 34 parts by weight of chloroacetonitrile is used and 66 parts by weight of glycol carbonate. This is 10 parts by weight Polyacrylonitrile dissolved at 55 to 60 °. The solution is still at room temperature flowable.
Beispiel 2 80 Geaarichtsteile Nitromethan und 20 Gewichtsteile Glykolcarbonat werden gemischt und hierin 10 Gewichtsteile Polyacrylnitril gelöst. Die Lösung erfolgt zwischen go bis IOO° und ist bei Zimmertemperatur zähelastisch, bei höheren Temperaturen gut fließfähig. Example 2 80 parts by weight of nitromethane and 20 parts by weight of glycol carbonate are mixed and dissolved therein 10 parts by weight of polyacrylonitrile. The solution takes place between 0 and 100 ° and is viscoplastic at room temperature, at higher temperatures good flowability.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC5077A DE924896C (en) | 1951-12-08 | 1951-12-08 | Process for shaping polymers of acrylonitrile and its copolymers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC5077A DE924896C (en) | 1951-12-08 | 1951-12-08 | Process for shaping polymers of acrylonitrile and its copolymers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE924896C true DE924896C (en) | 1955-03-10 |
Family
ID=7013578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC5077A Expired DE924896C (en) | 1951-12-08 | 1951-12-08 | Process for shaping polymers of acrylonitrile and its copolymers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE924896C (en) |
-
1951
- 1951-12-08 DE DEC5077A patent/DE924896C/en not_active Expired
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