DE613344C - Molded body made of polyvinyl alcohol - Google Patents

Molded body made of polyvinyl alcohol

Info

Publication number
DE613344C
DE613344C DEI43279D DEI0043279D DE613344C DE 613344 C DE613344 C DE 613344C DE I43279 D DEI43279 D DE I43279D DE I0043279 D DEI0043279 D DE I0043279D DE 613344 C DE613344 C DE 613344C
Authority
DE
Germany
Prior art keywords
polyvinyl alcohol
molded body
body made
water
tablets
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
DEI43279D
Other languages
German (de)
Inventor
Dr Werner Starck
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI43279D priority Critical patent/DE613344C/en
Application granted granted Critical
Publication of DE613344C publication Critical patent/DE613344C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
    • D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol

Description

Formkörper aus Polyvinylalkohol Es wurde gefunden, daß Formkörper aus Polyvinylalkohol und treibenden Mitteln den Vorteil besitzen, sich in Wasser leicht zu lösen,, ohne daß ein störendes Zusammenballen eintritt. Unter treibenden Mitteln werden solche Verbindungen oder Gemische von Verbindungen verstanden, die in Gegenwart von, Wasser Gase zu entwickeln vermögen. Solche treibende Mittel sind z. B. Gemische von Natriumcarbonat mit einer sauer reagierenden Substanz; wie beispielsweise Weinsäure, Oxalsäure oder Bisulfat. Man kann die Formkörper beispielsweise so herstellen, daß man pulverförmigen Polyvinylalkohol, so wie er technisch anfällt, mit einem Gemisch von Weinsäure und Natriumbicarbonat zu Tabletten von etwa 5o bis ioog Gewicht verpreßt. Infolge der treibenden Kraft des Zusatzmittels wird beim Auflösen der Tabletten im Wasser die Masse aufgelockert. Das Wasser kann ungehindert zu den einzelnen Teilchen des Polyvinylalkohols treten, und es erfolgt eine schnelle Auflösung des Polyvinylalkohols ohne Zusammenballen. Bei Verwendung derartiger Tabletten fallen weiterhin die Schwierigkeiten fort, die sich beim Dosieren des staubfeinen Polyvinylalkohols ergeben.Moldings made from polyvinyl alcohol It has been found that moldings Polyvinyl alcohol and propellants have the advantage of being in water easy to solve, without a disturbing agglomeration occurring. Under driving Agents are understood to mean those compounds or mixtures of compounds which capable of evolving gases in the presence of water. Such driving agents are z. B. Mixtures of sodium carbonate with an acidic substance; like for example Tartaric acid, oxalic acid or bisulfate. The moldings can be produced, for example, that powdered polyvinyl alcohol, as it is technically obtained, with a Mixture of tartaric acid and sodium bicarbonate to form tablets of about 50 to 10000 weight pressed. As a result of the driving force of the additive, the Tablets in the water loosened the mass. The water can flow freely to the individual Particles of polyvinyl alcohol occur, and rapid dissolution of the occurs Polyvinyl alcohol without agglomeration. When using such tablets fall continue the difficulties that arise when metering the dusty polyvinyl alcohol result.

Es ist bereits bekannt, Tabletten mit gasentwickelnden Stoffen zu versehen zu dem Zweck, sie rascher in Lösung zu bringen. Hierbei handelt es sich aber durchweg um Stoffe, die leicht in Wasser löslich sind. Es war deshalb überraschend, daß sich auch hochmolekulare; in Wasser schwer lösliche Körper, wie Polyvinylalkohol, ohne Schwierigkeit mit Hilfe von treibenden Mitteln in Lösung bringen lassen, ohne daß hierbei ein Ausfallen dieser kolloidal löslichen Körper durch die als treibende Mittel verwandten Substanzen eintritt und ohne daß hierbei der Polyvinylalkohol in seiner Wirkung z. B. als Schlichtemittel beeinträchtigt wird. Beispiele i. Man mischt 9o Gewichtsteile eines pulverförmigen Polyvinylalkohols, so wie er technisch anfällt, mit io Gewichtsteilen eines Gemisches von äquivalenten Mengen. Natriurn.-bicarbonat und Weinsäure. Die Mischung wird zu Tabletten verpreßt. Die so hergestellten Tabletten lösen sich leicht und ohne Zusammenballen in Wasser auf.It is already known to use tablets with gas-evolving substances provided for the purpose of solving them more quickly. This is it but consistently about substances that are easily soluble in water. It was therefore surprising that there are also high molecular weight; Solids that are sparingly soluble in water, such as polyvinyl alcohol, without difficulty let it be brought into solution with the help of driving means, without that in this case a precipitation of these colloidally soluble bodies by the acting as a driving force Means related substances occurs and without the polyvinyl alcohol in its effect z. B. is affected as a sizing agent. Examples i. Man mixes 90 parts by weight of a powdered polyvinyl alcohol, as it is technically is obtained, with 10 parts by weight of a mixture of equivalent amounts. Sodium bicarbonate and tartaric acid. The mixture is compressed into tablets. The tablets produced in this way dissolve easily in water without clumping together.

z. zoo Gewichtsteile eines Polyvinylalkohols, der in Wasser hochviscose Lösungen liefert, und ioo Gewichtsteile eines Polyvinylalkohols von geringerer Viscosität werden in einer Kugelmühle mit I5 Gewichtsteilen eines Gemisches äquivalenter Mengen von Natriumbisulfat und Natriumbicarbonat gemischt. Diese Mischung wird zu Tabletten gepreßt Die Tabletten lösen sich ohne Klumpenbildung leicht in Wasser auf.z. zoo parts by weight of a polyvinyl alcohol, which is highly viscous in water Solutions provides, and 100 parts by weight of a polyvinyl alcohol of lower viscosity are in a ball mill with 15 parts by weight of a Mixture equivalent amounts of sodium bisulfate and sodium bicarbonate mixed. This mixture is pressed into tablets The tablets dissolve easily in without clumping Water on.

Claims (1)

PAigTSNTANSPRUCH: Formkörper aus Polyvinylalkohol, gekennzeichnet durch Zusatz eines treibend wirkenden Stoffes.REQUIREMENT: Moldings made of polyvinyl alcohol, marked by adding a driving substance.
DEI43279D 1931-12-17 1931-12-17 Molded body made of polyvinyl alcohol Expired DE613344C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI43279D DE613344C (en) 1931-12-17 1931-12-17 Molded body made of polyvinyl alcohol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI43279D DE613344C (en) 1931-12-17 1931-12-17 Molded body made of polyvinyl alcohol

Publications (1)

Publication Number Publication Date
DE613344C true DE613344C (en) 1935-05-17

Family

ID=7190987

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI43279D Expired DE613344C (en) 1931-12-17 1931-12-17 Molded body made of polyvinyl alcohol

Country Status (1)

Country Link
DE (1) DE613344C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419987A1 (en) * 1989-09-26 1991-04-03 Wacker-Chemie Gmbh Use of copolymers of vinylalcohol as strewing powder for textiles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419987A1 (en) * 1989-09-26 1991-04-03 Wacker-Chemie Gmbh Use of copolymers of vinylalcohol as strewing powder for textiles

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