DE900018C - Process for the preparation of aqueous emulsions of polysiloxanes - Google Patents

Process for the preparation of aqueous emulsions of polysiloxanes

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Publication number
DE900018C
DE900018C DEG9514A DEG0009514A DE900018C DE 900018 C DE900018 C DE 900018C DE G9514 A DEG9514 A DE G9514A DE G0009514 A DEG0009514 A DE G0009514A DE 900018 C DE900018 C DE 900018C
Authority
DE
Germany
Prior art keywords
polysiloxanes
weight
water
mixture
preparation
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
DEG9514A
Other languages
German (de)
Inventor
Dr Hellmuth Stamm
Hugo Arens
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.)
Evonik Operations GmbH
Original Assignee
TH Goldschmidt 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 TH Goldschmidt AG filed Critical TH Goldschmidt AG
Priority to DEG9514A priority Critical patent/DE900018C/en
Application granted granted Critical
Publication of DE900018C publication Critical patent/DE900018C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C09K23/54Silicon compounds

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Silicon Polymers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Description

Verfahren zur Herstellung von wäßrigen Emulsionen von Polysiloxanen Im Patent 894771 ist ein Verfahren zur Herstellung von wäßrigen Emulsionen siliciumorganischer Verbindungen unter Verwendung von in Wasser löslichen Lösungsmitteln unter Schutz gestellt, das dadurch gekennzeichnet ist, daß Polysiloxane in einer Mischung von einwertigen Alkoholen und Alkylaminen gelöst und dann in Wasser emulgiert werden. Die im Lösungsmittelgemisch verwandten Alkylamine sollen dabei in der Weise wirken, daß sie in der wäßrigen Phase mit reaktiven Gruppen der Polysiloxane reagieren, wodurch sie gleichzeitig als Emulgatoren dienen.Process for the preparation of aqueous emulsions of polysiloxanes Patent 894771 describes a process for the preparation of aqueous emulsions of organosilicon Compounds using water-soluble solvents under protection provided, which is characterized in that polysiloxanes in a mixture of monohydric alcohols and alkylamines are dissolved and then emulsified in water. The alkylamines used in the solvent mixture should act in such a way that that they react in the aqueous phase with reactive groups of the polysiloxanes, whereby they also serve as emulsifiers.

Es wurde nun gefunden, daß ganz besonders beständige wäßrige Emulsionen mit Polysiloxanen erhalten werden können, wenn man die Polysiloxane in einer Mischung von Alkoholen und Alkylaminen, gegebenenfalls unter Zusatz von Ketonen, in Gegenwart .geringer Mengen Ölsäure löst und anschließend in Wasser, vorzugsweise in destilliertem oder vorgereinigtem Wasser, emulgiert.It has now been found that particularly stable aqueous emulsions with polysiloxanes can be obtained if the polysiloxanes are in a mixture of alcohols and alkylamines, optionally with the addition of ketones, in the presence . Small amounts of oleic acid dissolves and then in water, preferably in distilled or pre-purified water, emulsified.

Die überraschend. gute Emulsionsbildung läßt sich in. der Weise erklären, daß Alkylamine, z. B. Triäthylamin, und Ölsäure in dem oben beschriebenen Stoffgemisch noch nicht miteinander reagieren und daß zunächst beim Einbringen des Stoffgemisches in Wasser eine Hydratisierun:g des verwendeten Alkylamins zu Alkylammoniumhydroxy d stattfindet, welches seinerseits mit der Ölsäure zu Alkylammoniumoleat bzw. mit reaktiven Gruppen der Polysiloxane reagiert und,dann ausgezeichnete emulgierende Wirkung besitzt. Als besonders vorteilhaft muß dabei angesehen werden, daß alle zur Bildung einer Emulsion notwendigen Stoffe als Gemisch in gelöster Form vereint werden können und die Herstellung einer wäßrigen Emulsion durch Eingießen dieser Mischung in Wasser unter vereinfachten Bedingungen geschehen kann.The surprising. good emulsion formation can be explained in the way that alkylamines, e.g. B. triethylamine, and oleic acid in the mixture of substances described above do not yet react with each other and that initially when the mixture of substances is introduced hydration in water: g of the alkylamine used to give alkylammonium hydroxy d takes place, which in turn with the oleic acid to alkylammonium oleate or with reactive groups of the polysiloxanes reacts and, then excellent emulsifying Has an effect. It must be regarded as particularly advantageous that all to the Formation of an emulsion necessary substances as a mixture in dissolved Form can be combined and the preparation of an aqueous emulsion by pouring this mixture can be done in water under simplified conditions.

So hergestellte Emulsionen sind länger als i Woche ohne Anzeichen von Aufrahmung beständig. Mit Vorteil können diese Emulsionen erheblich mit Wasser verdünnt werden. Sie eignen sich bei diesem Verdünnungsgrad zur Behandlung von Gegenständen aller Art, die wirtschaftlich mit einem Silikonfilm versehen werden sollen.Emulsions made in this way have been without any signs for more than a week from creaming resistant. These emulsions can advantageously be mixed with water considerably be diluted. With this degree of dilution, they are suitable for treating objects of all kinds that should be economically provided with a silicone film.

Unter Polysiloxanen sollen sowohl Polysiloxan-!harze und Polysiloxanöle als auch Mischungen derselben miteinander verstanden werden.Polysiloxanes should include both polysiloxane resins and polysiloxane oils as well as mixtures thereof with one another are understood.

Beispiel i i Gewichtsteil Polysiloxanharz wird in einer Mischung von 3 Gewichtsteilen i-Propylalkohol, g Gewichtsteilen Ät!hytalkohol, i Gewichtsteil Triäthylamin und o@,2 Gewichtsteilen Ölsäure gelöst. Die Lösung wird unter kräftigem Rühren in 85,8 (Gewichtsteile Wasser eingebracht. Es entsteht eine feinstverteilte, beständige Emulsion, die auch nach einer Lagerzeit von i Woche nicht aufrahmt. Beispiele 9 Gewichtsteile Polysiloxanöl und i !Gewichtsteil Polysiloxanharz werden in einer Mischung von 15 Gewichtsteilen i-Pröpylalkohol, 15 Gewichtsteilen Aceton, 9o Gewichtssteilen Äthylalkohol, io Gewichtsteilen Triäthylamin und 2 Ge,#vichtsteilen Ölsäure gelöst. Die Mischung bildet in Wasser, wie in Beispiel i beschrieben, eine äußerst beständige Emulsion.Example i i part by weight of polysiloxane resin is in a mixture of 3 parts by weight of i-propyl alcohol, g parts by weight of ethereal alcohol, 1 part by weight Triethylamine and o @, 2 parts by weight of oleic acid dissolved. The solution is under vigorous Stirring in 85.8 (parts by weight of water. The result is a finely divided, stable emulsion that does not cream even after a storage time of 1 week. Examples 9 parts by weight of polysiloxane oil and 1 part by weight of polysiloxane resin are in one Mixture of 15 parts by weight of i-propyl alcohol, 15 parts by weight of acetone, 90 parts by weight Ethyl alcohol, 10 parts by weight of triethylamine and 2 parts by weight of oleic acid dissolved. The mixture forms an extremely stable one in water, as described in Example i Emulsion.

Claims (1)

PATENTANSPRUCH: Weiterausbildung des Verfahrens zur Herstellung von wäßrigen Emulsionen von silici:umorganischen Verbindungen unter Verwendung von in Wasser löslichen Lösungsmitteln nach Patent 894 771, dadurch gekennzeichnet, daß Polysiloxane in einer Mischung von Alkoholen und Alkylaminen, gegebenenfalls unter Zusatz von Ketonen, in Gegenwart von geringen Mengen Ölsäure gelöst und dann in Wasser emulgiert werden Angezogene Druckschriften: Britische Patentschrift Nr. 586 9.o8. PATENT CLAIM: Further development of the process for the production of aqueous emulsions of silici: inorganic compounds using water-soluble solvents according to Patent 894 771, characterized in that polysiloxanes in a mixture of alcohols and alkylamines, optionally with the addition of ketones, in the presence of low Quantities of oleic acid are dissolved and then emulsified in water. Cited references: British Patent No. 586 9.o8.
DEG9514A 1952-08-07 1952-08-07 Process for the preparation of aqueous emulsions of polysiloxanes Expired DE900018C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG9514A DE900018C (en) 1952-08-07 1952-08-07 Process for the preparation of aqueous emulsions of polysiloxanes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG9514A DE900018C (en) 1952-08-07 1952-08-07 Process for the preparation of aqueous emulsions of polysiloxanes

Publications (1)

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DE900018C true DE900018C (en) 1953-12-17

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DEG9514A Expired DE900018C (en) 1952-08-07 1952-08-07 Process for the preparation of aqueous emulsions of polysiloxanes

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033894B (en) * 1955-08-03 1958-07-10 Bayer Ag Process for the preparation of emulsions of liquid organopolysiloxanes
DE1080010B (en) * 1957-11-20 1960-04-14 Goldschmidt Ag Th Process for the hydrophobing of asbestos cement products
DE1161419B (en) * 1961-12-23 1964-01-16 Bayer Ag Process for the preparation of alkyl hydrogen polysiloxane emulsions

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB586908A (en) * 1943-10-11 1947-04-03 Owens Corning Fiberglass Corp Improvements in the production of fibrous glass in strand and other forms

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB586908A (en) * 1943-10-11 1947-04-03 Owens Corning Fiberglass Corp Improvements in the production of fibrous glass in strand and other forms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033894B (en) * 1955-08-03 1958-07-10 Bayer Ag Process for the preparation of emulsions of liquid organopolysiloxanes
DE1080010B (en) * 1957-11-20 1960-04-14 Goldschmidt Ag Th Process for the hydrophobing of asbestos cement products
DE1161419B (en) * 1961-12-23 1964-01-16 Bayer Ag Process for the preparation of alkyl hydrogen polysiloxane emulsions

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