DE860240C - Process for the production of low-acetic acid stretched synthetic silk with increased elongation from stretched acetate - Google Patents

Process for the production of low-acetic acid stretched synthetic silk with increased elongation from stretched acetate

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Publication number
DE860240C
DE860240C DED1970D DED0001970D DE860240C DE 860240 C DE860240 C DE 860240C DE D1970 D DED1970 D DE D1970D DE D0001970 D DED0001970 D DE D0001970D DE 860240 C DE860240 C DE 860240C
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DE
Germany
Prior art keywords
stretched
acetate
acetic acid
production
low
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
Application number
DED1970D
Other languages
German (de)
Inventor
Arnulf Dr Sippel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rhodiaceta AG
Original Assignee
Rhodiaceta AG
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 Rhodiaceta AG filed Critical Rhodiaceta AG
Priority to DED1970D priority Critical patent/DE860240C/en
Application granted granted Critical
Publication of DE860240C publication Critical patent/DE860240C/en
Expired legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/38Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
    • D06M11/385Saponification of cellulose-acetate

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)

Description

Verfahren zur Herstellung von essigsäurearmen Acetatstreckkunstseiden mit erhöhter Dehnung aus Acetatstreckkunstseide Es ist bekannt, daß man durch Desacetylieren von Acetatstreckkunstseide Fäden von erhöhter Dehnbarkeit erhält, ja daß die Dehnbarkeit durch derartige Verfahren überhaupt erst so erhöht wird, daß diese Kunstseiden praktisch Anwendung finden können. Es ist auch bekannt, für die desacetylierende Behandlung wäßriges Ammoniak zu benutzen. Ferner ist bekannt, aliphatische Amine oder Diamine in wäßriger oder wäßrig-alkoholischer oder alkoholischer Lösung zur Behandlung der Acetatstreckkunstseide zu benutzen.Process for the production of low-acetic acid drawstring acetate with increased elongation from acetate stretch rayon It is known that deacetylation from stretched acetate silk receives threads of increased extensibility, yes that the extensibility is only increased by such processes so that these rayons are practical Can find application. It is also known for deacetylating treatment to use aqueous ammonia. It is also known to use aliphatic amines or diamines in aqueous or aqueous-alcoholic or alcoholic solution for the treatment of Use acetate stretch rayon.

Im Gegensatz zu den genannten Verfahren benutzt die vorliegende Erfindung eine Lösung von Ammoniak in Wasser und einen in wäßriger Ammoniaklösung löslichen Alkohol, z. B. 4lthylalkohol. Die Verwendung von Ammoniak zur Desacetylierung von Celluloseacetatfäden od. dg1. ist, wie schon bemerkt, an sich lange bekannt; die Wirkung eines Alkohols für sich allein ist so schwach, daß sie teclinische Anwendung nicht gefunden hat. Neu ist dagegen die besondere Wirkung, welche Gemische aus wäßrigem Ammoniak und Alkohol bzw. mit Ammoniakgas angereicherte wäßrig-alkoholische Gemische entfalten. Die Wirkung dieser Gemische ist wesentlich besser, als sie die einzelnen Komponenten auszuüben imstande sind.In contrast to the aforementioned methods, the present invention employs one solution of ammonia in water and one soluble in aqueous ammonia solution Alcohol, e.g. B. ethyl alcohol. The use of ammonia to deacetylate Cellulose acetate threads or dg1. as already noted, has been known per se for a long time; the The effect of an alcohol by itself is so weak that it can be used clinically has not found. What is new, however, is the special effect which mixtures of aqueous Ammonia and alcohol or aqueous-alcoholic mixtures enriched with ammonia gas unfold. The effect of these mixtures is much better than the individual ones Components are able to exercise.

Daß das neue Gemisch eine über eine additive Wirkung hinausgehende besondere Wirkung besitzt, wurde durch die folgenden Versuchsreihen bewiesen Es wurden zunächst konzentriertes, wäßriges 32%iges Ammoniak und Äthylalkohol in verschiedenen Verhältnissen miteinander gemischt und mit jeder einzelnen derartigen Mischung in genau gleicher Weise Fäden von Acetatstreckkunstseide behandelt. Nach genau der gleichen Zeit, nämlich nach 15 Stunden, wurde die Behandlung bei jedem Versuch unterbrochen und Festigkeit und Dehnung gemessen. Erste Versuchsreihe xx x2 Vers. Nr. r 2 3 - 4 5 7 8 9 10 Volument. konz. wäßr. Ammoniak io 9 8 7 6 5 4 3 2 = 0 0 Volument. Alkohol 0 1 2 3 4 5 6 7 8 9 10 0 Titer in Denier 108 ioo 86 92 go 92 86 92 io6 120 118 120 Reißfestigkeit tr.ingrDenier. 2,3 2,1 2,7 2,7 2,6 2,7 2,8 2,3 2,2 2,5 2,8 2,5 Bruchdehnung tr. in 0% 7,2 5,2 8,6 io,8 io,o io,o 9,2 6,2 5,8 6,4 6,2 5,8 Gewichtsverl. durch Be- handlungin% 35,4 35,7 36,o 36,5 37,1 36,0 33,8 28,4 13,7 5,1 3,0 0 Schrumpfung _ in 0/0 7,0 7,o io,o 13,8 19,2 i3,o 10,2 7,6 5,4 4,0 1,2 1,0 Eine ursprünglicheDehnungvon nur5,8%wurde also durch Anwendung der Gemische bei den Versuchen Nr. 4, 5 und 6 auf io 0% und darüber, unter Verbesserung der Reißfestigkeit, gesteigert, während mit wäßrigem Ammoniak allein nur 7,20% Dehnung erreicht wurden. Bei einer weiteren Versuchsreihe, bei der Acetatstreckkunstseide aus einer anderen Partie benutzt wurde, wurde ebenso, wie oben beschrieben, verfahren, jedoch 48 Stunden lang verseift (desacetyliert). Zweite Versuchsreihe Vers. Nr. J_- 1 2 3 4 5 - 6 7 8 9 10 1 iz 1 12 Volument. konz. wäßr. Ammoniak 10 9 8 7 6 5 4 : 3 2 1 0 0 Volument. Äthylalkohol o i 2 3 4 5 6 7 8 g io 0 Titer in Denier 81 81 8o 88 g2 92 86 77 8o 100 122 iig Reißfestigkeit tr.ing/Denier. 3,6 3,8 3,2 3,1 a,7. 2,2 2,6 3,6 3,9 2,4 2,6 2,5 Bruchdehnung tr. in 0/0 5,8 5,6 6,6 =o,o 13,2 8,4 7,4 6,2 5,2 3,6 3,8 3,1 Gewichtsverl. durch Be- handlungin0(0 35j8 35,8 35,8 36,o 38,4 38,5 39,8 38,5 37,5 21,6 1,8 Schrumpfung 0/0 6,0 6,o 9,4 i3,8 20,2 20,4 15,2 7,6 5,5 6,2 2,4 _ , Auch bei dieser Versuchsreihe wird durch die gemeinsame Anwendung von Ammoniak, Wasser und Alkohol eine erhebliche Verbesserung der Dehnung, nämlich von ursprünglich 3,1 auf io, ja sogar 13 0/0 bewirkt, während durch wäßriges Ammoniak nur 5,80/0 Dehnung erzielt wurden. Dabei stieg die Reißfestigkeit in g/Denier bei den Versuchen Nr. 4 und 5, wo io bzw. 13,7, Dehnung erzielt wurden, gegenüber dem Blindversuch Nr. i2 noch an.That the new mixture has a special effect that goes beyond an additive effect was proven by the following series of tests: First, concentrated, aqueous 32% ammonia and ethyl alcohol were mixed with one another in various proportions and with each such mixture in exactly the same way, threads of stretched acetate were mixed treated. After exactly the same time, namely after 15 hours, the treatment was interrupted for each test and strength and elongation were measured. First series of experiments xx x2 Vers. No. r 2 3 - 4 5 7 8 9 10 Volume. conc. aq. Ammonia io 9 8 7 6 5 4 3 2 = 0 0 Volume. Alcohol 0 1 2 3 4 5 6 7 8 9 1 0 0 Titer in denier 1 0 8 ioo 86 92 go 92 86 92 io6 120 118 120 Tear resistance tr.ingrDenier. 2.3 2.1 2.7 2.7 2.6 2.7 2.8 2.3 2.2 2.5 2.8 2.5 Elongation at break tr. in 0% 7.2 5.2 8.6 io, 8 io, o io, o 9.2 6.2 5.8 6.4 6.2 5.8 Weight loss by loading action in% 35.4 35.7 36, o 36.5 37.1 36.0 33.8 28.4 13.7 5.1 3.0 0 Shrinkage _ in 0/0 7.0 7, o io, o 13.8 19.2 i3, o 1 0.2 7.6 5.4 4.0 1.2 1.0 An original elongation of only 5.8% was thus increased by using the mixtures in tests No. 4, 5 and 6 to 10% and above, while improving the tear strength, while only 7.20% elongation was achieved with aqueous ammonia alone. In a further series of tests, in which stretched acetate silk from a different batch was used, the same procedure was followed as described above, but saponified (deacetylated) for 48 hours. Second series of experiments Vers. No. J_- 1 2 3 4 5 - 6 7 8 9 10 1 iz 1 12 Volume. conc. aq. Ammonia 1 0 9 8 7 6 5 4: 3 2 1 0 0 Volume. Ethyl alcohol oi 2 3 4 5 6 7 8 g io 0 Titer in denier 81 81 8o 88 g2 92 86 77 8o 1 00 122 iig Tear resistance tr.ing/Denier. 3.6 3.8 3.2 3.1 a, 7. 2.2 2.6 3.6 3.9 2.4 2.6 2.5 Elongation at break tr. in 0/0 5.8 5.6 6.6 = o, o 13.2 8.4 7.4 6.2 5.2 3.6 3.8 3.1 Weight loss by loading action in0 (0 35j8 35.8 35.8 36, o 38.4 38.5 39.8 38.5 37.5 21.6 1.8 shrinkage 0/0 6.0 6, o 9.4 i3.8 20.2 20.4 15.2 7.6 5.5 6.2 2.4 _, In this series of tests, too, the joint use of ammonia, water and alcohol brings about a considerable improvement in elongation, namely from originally 3.1 to 10, even 13%, while aqueous ammonia only achieves 5.80 / 0 elongation became. The tensile strength in g / denier in tests no. 4 and 5, where 10 and 13.7 elongations were achieved, respectively, increased compared to blind test no. 12.

Während die erste Versuchsreihe zeigt, daß schon eine Verseifungs- (Desacetylierungs-) Dauer von 15 Stunden (evtl. noch viel weniger) genügt, zeigt die zweite Versuchsreihe, daB eine längere Dauer nicht schadet.While the first series of experiments shows that even a saponification (Deacetylation) duration of 15 hours (possibly much less) is sufficient, shows the second series of experiments that a longer duration does not harm.

Durch die Behandlung mit einem geeigneten Gemisch von wäBrigem Ammoniak und Alkohol wird in beiden Versuchsreihen die Dehnung auf nahezu das Doppelte, ja auch das Dreifache und mehr des Ausgangswertes gebracht, während durch die Behandlung mit wäßrigem Ammoniak nur eine viel geringere Verbesserung erzielt wird.By treatment with a suitable mixture of aqueous ammonia and alcohol will almost double the stretch in both series of experiments, yes also brought three times and more of the initial value while through treatment much less improvement is achieved with aqueous ammonia.

Anstatt des Äthylalkohols läßt sich mit gleichem Erfolg jeder andere in wäßriger Ammoniaklösung lösliche Alkohol verwenden. Das jeweilige optimal wirksame Gemisch ist experimentell leicht zu ermitteln.Instead of ethyl alcohol, anyone else can be used with equal success Use alcohol which is soluble in aqueous ammonia solution. The respective optimally effective Mixture is easy to determine experimentally.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von essigsäurearmer Acetatstreckkunstseide mit erhöhter Dehnung aus Acetatstreckkunstseide, dadurch gekennzeichnet, daB Celluloseacetatstreckkunstseidefäden einer desacetylierenden Behandlung mit Hilfe von Gemischen aus Ammoniak, Wasser und einem in wäBriger Ammoniaklösung löslichen Alkohol, vorzugsweise aus Gemischen von q.o bis 70 VolUmteilen, 32 gewichtsprozentigem wäBrigem Ammoniak und 6o bis 30 Volumteilen Äthyl-, alkohol, unterworfen werden.PATENT CLAIM: A process for the production of low-acetic acid-poor acetate stretched rayon with increased elongation from acetate stretched rayon, characterized in that cellulose acetate stretched rayon threads undergo a deacetylating treatment with the aid of mixtures of ammonia, water and an alcohol soluble in aqueous ammonia solution, preferably from mixtures of up to 70 percent by weight by weight Ammonia and 6o to 30 parts by volume of ethyl, alcohol, are subjected.
DED1970D 1944-01-08 1944-01-08 Process for the production of low-acetic acid stretched synthetic silk with increased elongation from stretched acetate Expired DE860240C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED1970D DE860240C (en) 1944-01-08 1944-01-08 Process for the production of low-acetic acid stretched synthetic silk with increased elongation from stretched acetate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED1970D DE860240C (en) 1944-01-08 1944-01-08 Process for the production of low-acetic acid stretched synthetic silk with increased elongation from stretched acetate

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DE860240C true DE860240C (en) 1952-12-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921890C (en) * 1953-02-10 1954-12-30 Sphinx Film A G Process for the saponification of cellulose acetate films with sodium hydroxide solution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921890C (en) * 1953-02-10 1954-12-30 Sphinx Film A G Process for the saponification of cellulose acetate films with sodium hydroxide solution

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