DE717880C - Softener for films made from regenerated cellulose or from cellulose formate - Google Patents
Softener for films made from regenerated cellulose or from cellulose formateInfo
- Publication number
- DE717880C DE717880C DEK147370D DEK0147370D DE717880C DE 717880 C DE717880 C DE 717880C DE K147370 D DEK147370 D DE K147370D DE K0147370 D DEK0147370 D DE K0147370D DE 717880 C DE717880 C DE 717880C
- Authority
- DE
- Germany
- Prior art keywords
- cellulose
- formate
- films made
- films
- softener
- 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
- 229920002678 cellulose Polymers 0.000 title claims description 11
- 239000001913 cellulose Substances 0.000 title claims description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 title claims description 9
- 239000004627 regenerated cellulose Substances 0.000 title claims description 9
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims 1
- 239000004014 plasticizer Substances 0.000 description 11
- 239000011888 foil Substances 0.000 description 6
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000011592 zinc chloride Substances 0.000 description 3
- 235000005074 zinc chloride Nutrition 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- CYDQOEWLBCCFJZ-UHFFFAOYSA-N 4-(4-fluorophenyl)oxane-4-carboxylic acid Chemical compound C=1C=C(F)C=CC=1C1(C(=O)O)CCOCC1 CYDQOEWLBCCFJZ-UHFFFAOYSA-N 0.000 description 1
- 239000004251 Ammonium lactate Substances 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004348 Glyceryl diacetate Substances 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- 206010037867 Rash macular Diseases 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229940059265 ammonium lactate Drugs 0.000 description 1
- 235000019286 ammonium lactate Nutrition 0.000 description 1
- RZOBLYBZQXQGFY-HSHFZTNMSA-N azanium;(2r)-2-hydroxypropanoate Chemical compound [NH4+].C[C@@H](O)C([O-])=O RZOBLYBZQXQGFY-HSHFZTNMSA-N 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 235000019443 glyceryl diacetate Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- OETHQSJEHLVLGH-UHFFFAOYSA-N metformin hydrochloride Chemical compound Cl.CN(C)C(=N)N=C(N)N OETHQSJEHLVLGH-UHFFFAOYSA-N 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
- 239000001540 sodium lactate Substances 0.000 description 1
- 229940005581 sodium lactate Drugs 0.000 description 1
- 235000011088 sodium lactate Nutrition 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- -1 urine Chemical compound 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/02—Chemical treatment or coating of shaped articles made of macromolecular substances with solvents, e.g. swelling agents
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts thereof
-
- 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
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Weichmachungsmittel für Folien aus regenerierter Cellulose oder aus Celluloseformiat Folien aus regenerierter Cellulose oder aus Cellulosederivaten stellen ohne besondere Zutaten meist spröde Gebilde dar und sind in diesem Zustand für die meisten Verwendungszwecke unbrauchbar. Um solche Folien der praktischen Verwendung zugänglich zu machen, hast man sie mit Weichmachern versehen, die ihnen einen geschmeidigen Griff verleihen und ihre Dehnbarkeit und Falzzahl erhöhen. Als Weichmacher werden verschiedene organische Stoffe verwendet, die zum größten Teil auch in der Celluloselackindustrie gehr äuclilich sind. Die wesentlichen Weichmacher sind Ester, Äther, Alkohole und Harnstoffderivate. Unter die§pn sind Trikresylphosphat, Dibutylphthalat, Glycerin und Di-,ithyldiplleiiylharnstoff die gebräuchlichsten. Diese Weichmacher haben jedoch den Nachteil, daß sie oder ihre Bestandteile synthetisch schwer zugänglich sind, und sind daher in ihrem Gebrauch unwirtschaftlich. Außerdem haben die meisten von ihnen einen störenden Geruch oder Geschmack.Softening agents for films made from regenerated cellulose or from Cellulose formate films made from regenerated cellulose or cellulose derivatives Without special ingredients they are mostly brittle structures and are in this state unusable for most purposes. To such slides the practical To make them accessible for use, they have been provided with plasticizers that give them give a smooth handle and increase their elasticity and fold number. as Plasticizers are used in various organic substances, for the most part are also very common in the cellulose lacquer industry. The essential plasticizers are esters, ethers, alcohols and urea derivatives. Among the §pn are tricresyl phosphate, Dibutyl phthalate, glycerine and di-, ithyldiplleiiylurea the most common. However, these plasticizers have the disadvantage that they or their components are synthetic are difficult to access, and are therefore uneconomical to use. aside from that most of them have an offensive smell or taste.
Es wurde auch vorgeschlagen, einzelne organische und anorganische Salze als Weichmach.er zu verwenden. Unter diesen besitzen Ammoniumlactat und Natriumlactat den Nachteil, daß sie einen unangenehmen Geruch haben, so d.aß die damit weichgemachten Folien für die meisten Zwecke, insbesondere zur Verpackung von Lebens- und Genußmitteln, nicht verwendet werden können. Magnesiumc'hlorid, Calciumchlorid und Zinkchlorid besitzen die unangenehme Eigenschaft, beim Lagern der Folien auszukristallisieren, wodurch die Folien trüb, fleckig, undurchsichtig und auch brüchig werden. Außerdem ist die Verwendung von Zinkchlorid unwirtschaftlich, da das Zink für zahlreiche wichtigere Zwecke benötigt wird.It has also been suggested individual organic and inorganic Use salts as plasticizers. Among these, have ammonium lactate and sodium lactate the disadvantage that they have an unpleasant odor, i.e. those softened with them Foils for most purposes, especially for the packaging of food and luxury foods, cannot be used. Magnesium chloride, calcium chloride and zinc chloride have the unpleasant property of crystallizing out when the foils are stored, whereby the films become cloudy, blotchy, opaque and also brittle. aside from that the use of zinc chloride is uneconomical, since the zinc for numerous more important purposes are needed.
Es wurde nun gefunden, daß man Kaliumformiat mit Erfolg als NVeichmacher für Folien aus regenerierter Cellulose oder aus Celluloseformiat verwenden kann.It has now been found that potassium formate can be used successfully as a plasticizer can be used for films made of regenerated cellulose or cellulose formate.
Kaliumformiat ist völlig geruchlos. Es kristallisiert aus seiner wäßrigen Lösung nur sehr langsam und schwer aus. Die damit weichgemachten Folien bleiben daher auch bei längerem Lagern weich und durchsichtig. Flecken infolge Kristallisierung treten nicht auf. Auch sind die mit Kaliumformiat weichgemachten Folien sehr temperatur- und feuchtigkeitsbeständig. Schließlich ist zu ersvähncn, daß Kaliumformiat in beliebiger Menge- ums billigen Ausgangsstoffen, haliumsulfat, Kallz und Kohlenoxyd hergestellt werden kann.Potassium formate is completely odorless. It crystallizes from its aqueous Solution only very slowly and with difficulty. The foils plasticized with it remain therefore soft and transparent even when stored for a long time. Crystallization stains do not occur. The films plasticized with potassium formate are also very temperature-resistant. and moisture resistant. Finally, it should be mentioned that potassium formate In any amount - the cheap starting materials, halium sulphate, kallz and carbon oxide can be produced.
Das Kaliumformiat kann sowohl- für sielt als auch im Gemisch mit solchen wasserl@-liehen, zerfließlichen, anorganischen Salzen, die beim Eindunsten ihrer verdünnten, wäßrigen Lösungen bei gewöhnlicher Temperatur und gewöhnlichem Druck nicht oder nur schwer auskristallisieren, als Weichmacher für Folien aus regenerierter Cellulose oder aus Celluloseforrniat verwendet werden. Als Zusatz zum haliumformiat kommen dabei auch solche anorganischen Salze, wie Magnesiumchlorid, Calciuinclilorid und Zinkchlorid, in Frage, - die an sich, wie bereits ausgeführt, als Weichmacher nicht geeignet sind, da sie beim Lagern der Folien auskristallisieren. Im Gemisch mit haliumformiat finden diese nachteiligen Erscheinungen nicht statt.The potassium formate can be used both for and in a mixture with such water-borne, dissolvable, inorganic salts that evaporate when their dilute aqueous solutions at ordinary temperature and pressure not or only with difficulty crystallize, as a plasticizer for films made from regenerated Cellulose or cellulose formate can be used. As an addition to the halium formate Inorganic salts such as magnesium chloride and calcium chloride also come here and zinc chloride, in question - which per se, as already stated, act as plasticizers are not suitable as they crystallize out when the foils are stored. In a mixture with halium formate these disadvantageous phenomena do not occur.
Es wurde weiterhin gefunden, daß man als vorteilhafte Weichmacher für die genannten Folien auch :@Iischungen von Kaliumformiat, gegebenenfalls unter Zusatz der genannten anorganischen Salze, mit nicht salzartigen, aber wasserlöslichen organischen Stoffen benutzen kann. Geeignet hierzu sind Glycerin und seine Derivate, z. B. Diacetin oder Diformin, die verschiedenen Zucker und Zukkerall>ohole, z. B. Sorbit oder Mann.it, Harnstoif, Betain oder Glykokoll, Äthylen- oder Butylenglykol.It has also been found that plasticizers are advantageous for the foils mentioned also: mixtures of potassium formate, possibly under Addition of the inorganic salts mentioned, with not salt-like, but water-soluble can use organic substances. Glycerine and its derivatives are suitable for this, z. B. Diacetin or Diformin, the various sugars and Zuckerall> ohole, z. B. Sorbitol or mannitol, urine, betaine or glycol, ethylene or butylene glycol.
Das Kaliumformiat kann man in wäßriger Lösung den genannten Folien einverleiben. Man verwendet hierbei vorzugsweise i bis 200,'oige, insbesondere 2 bis ioo;oige Lösungen.The potassium formate can be added to the films mentioned in aqueous solution incorporate. One uses preferably 1 to 200, oige, in particular 2 to ioo; above solutions.
In Ausübung der Erfindung arbeitet man vorteilhaft derart, d213 man Folien aus regenerierter Cellulose oder aus Celluloseforiniat mit der i: äßrigen Lösung der Weichmacher behandelt. Hierauf braucht man die Folien nur noch in bekannter Weise zu trocknen, um sie in dem gewünschten verwendungsfähigen Zustand zu erhalten. Man erhält geschmeidige und plastische Folien, die weder schmierig noch klebrig sind und ihre volle Festigkeit beim Lagern beibehalten. Selbstverständlich können auch andere Verfahren zur Einverleibung der Weichmacher in die Folien angewandt werden.In practicing the invention, one works advantageously in such a way that d213 one Films made from regenerated cellulose or from cellulose format with the aqueous Solution of plasticizer treated. Then you only need the slides in a more familiar format Way to dry to keep them in the desired usable condition. The result is pliable and plastic films that are neither greasy nor sticky and retain their full strength during storage. Of course you can other methods of incorporating the plasticizers into the films are also used will.
Es ist bekannt, bei einem Verfahren zur Verminderung der Quellbarkeit von Form-1c-'::lclen aus Cellulose durch Erhitzen rfiit F@@rnia!aeh,-d bei 115- als Zusatzstolze unter anderen salzartigen Verbindungen Gemische #-on Natriumformiat mit löslichen Kal.iurnsalz ii zu verwenden. Nach der Behandlung mit F'orinaldeli@-d werden diese Ziisatzstoite ausge«-aschen. Im Gegensatz zu diesen bekannten t'ci-falii'en bezieht sich die Erfindung auf die Verc, endung von Kaliumformi.at zum Weichinacheu von Folien aus regenerierter Cell.ulos.e oder aus Celluloseformiat, wobei das Kaliumformiat d;-#:i Folien für dauernd einverleibt wird und eine Behandlung mit Formaldehyd nicht stattfindet.It is known in a method for reducing swellability of Form-1c - ':: oil from cellulose by heating rfiit F @@ rnia! aeh, -d at 115- as additional proud among other salt-like compounds mixtures of sodium formate to be used with soluble potassium salt ii. After treatment with F'orinaldeli @ -d these additives are washed out. In contrast to these well-known t'ci-falii'en the invention relates to the Verc, endung of Kaliumformi.at to Weichinacheu of films made from regenerated Cell.ulos.e or from cellulose formate, with the potassium formate d; - #: i Foils for permanent incorporation and treatment with formaldehyde not takes place.
Beispiele i. Durch eii:e 2o'oige w-ißrige Kaliumformiatlösung werden Form,;lcelltilosefolien gezogen und dann getrocknet. Das weich---machte Material ist von ausgezeichneter Klarheit und Geschmeidigkeit. Die Falzzahl liegt bei etwa 2ooo, die Dehnbarkeit bet>=ägt etwa ;oo'o, die Reißfestigkeit et;T-a 8 bis i o 7:g.Examples i. With an aqueous solution of 20% potassium formate Form, drawn and then dried. The --- softened material is of excellent clarity and suppleness. The number of folds is around 2ooo, the extensibility bet> = ägt about; oo'o, the tear strength et; T-a 8 to i o 7: g.
a. Regenerierte Cellulosefolien :verden mit einer wäßrigcn Lösung getränkt, die i c? c. Iialiumformiat und 20,.10 Dviagnesiumclilorid enthält. Es werden klare Folien erzielt, mit e inen1 geschmeidigen Griff und der erforderlichen Ite,'_13festigheit, Dehnbarkeit und Falzzahl.a. Regenerated cellulose films: verden with an aqueous solution soaked that i c? c. Contains iialium formate and 20, .10 dviagnesium chloride. It clear films are obtained, with a supple feel and the necessary Ite, '_ 13 strength, extensibility and number of folds.
3. R,2 generierte Cellulosefolien werden mit einer wäll'rigen Lösung behandelt, die 5()o Kaliumformiat und tc!@ith5-lenglyhol enthält. Es werden klare, geschmeidige Folien erhalten, die in bezug auf Reißfestigkeit. Dehnbarkeit und Falzzahl mindestens dieselben Zahlenwerte aufweisen, wie die im Handel erhältlichen Viscosefolien.3. R, 2 generated cellulose films are mixed with a watery solution which contains 5 () o potassium formate and tc! @ ith5-lenglyhol. It becomes clear obtained pliable films with respect to tear resistance. Extensibility and number of folds have at least the same numerical values as the commercially available viscose films.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK147370D DE717880C (en) | 1937-07-23 | 1937-07-24 | Softener for films made from regenerated cellulose or from cellulose formate |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2268832X | 1937-07-23 | ||
| DEK147370D DE717880C (en) | 1937-07-23 | 1937-07-24 | Softener for films made from regenerated cellulose or from cellulose formate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE717880C true DE717880C (en) | 1942-02-25 |
Family
ID=25984874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEK147370D Expired DE717880C (en) | 1937-07-23 | 1937-07-24 | Softener for films made from regenerated cellulose or from cellulose formate |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE717880C (en) |
-
1937
- 1937-07-24 DE DEK147370D patent/DE717880C/en not_active Expired
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