DE910340C - Process for the production of aqueous polysiloxane emulsions - Google Patents

Process for the production of aqueous polysiloxane emulsions

Info

Publication number
DE910340C
DE910340C DEG9952A DEG0009952A DE910340C DE 910340 C DE910340 C DE 910340C DE G9952 A DEG9952 A DE G9952A DE G0009952 A DEG0009952 A DE G0009952A DE 910340 C DE910340 C DE 910340C
Authority
DE
Germany
Prior art keywords
production
emulsions
aqueous polysiloxane
polysiloxane emulsions
mixture
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
DEG9952A
Other languages
German (de)
Inventor
Hugo Arens
Dr Hellmuth Stamm
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 DEG9952A priority Critical patent/DE910340C/en
Application granted granted Critical
Publication of DE910340C publication Critical patent/DE910340C/en
Expired legal-status Critical Current

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
    • 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
    • C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2383/04—Polysiloxanes

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Description

Verfahren zur Herstellung wäßriger Polysiloxanemulsionen Im Patent 89q.771 ist ein Zerfahren unter Schutz gestellt, das die Herstellung von wäßrigen Polysiloxanharzemulsionen betrifft und das dadurch gekennzeichnet ist, daß Polysiloxanharze in einer Mischung von einwertigen Alkoholen unter Zusatz von .,,lkylamin gelöst und dann in Wasser emulgiert werden. Hierbei wirken die verwendeten Alkylamine gleichzeitig als Emulgatoren und besitzen den Vorteil, daß sie bei Temperaturen unterhalb too° flüchtig sind.Process for preparing aqueous polysiloxane emulsions in the patent 89q.771 is a process under protection that the production of aqueous Polysiloxane resin emulsions and which is characterized in that polysiloxane resins dissolved in a mixture of monohydric alcohols with the addition of. ,, lkylamine and then emulsified in water. The alkylamines used act at the same time as emulsifiers and have the advantage that they can be used at temperatures below too ° are volatile.

Es wurde nun in Weiterausbildung des Verfahrens des Hauptpatents gefunden, daß man nach dem gleichen Verfahrensprinzip eine ebenso haltbare und feinverteilte Emulsion herstellen kann, wenn in dem Lösungsmittelgemisch für das Polysiloxan der Alkylaminanteilweitgehend durch Äthylacetat ersetzt wird und nur so viel Alkylamin zugesetzt wird, daß die herzustellende Emulsion einen pH-Wert von wenigstens 7,5 erhält. Auf diese Weise gelingt es, Emulsionen herzustellen, die einen Silikonfilm liefern, der nach dem Wegtrocknen des Wassers und der Lösungsmittel infolge der Leichtflüchtigkeit des Äthylacetats keinen zur Emulgierung befähigten Körper mehr enthält. Diese Tatsache erlaubt es, die Emulsionen sehr vielseitig einzusetzen und insbesondere für solche Fälle zu benutzen, in denen eine hohe Wasserfestigkeit des Silikonfilms erforderlich ist.It has now been found in further development of the process of the main patent, that you can use the same process principle to produce an equally durable and finely divided one Can produce emulsion when in the solvent mixture for the polysiloxane Alkylamine is largely replaced by ethyl acetate and only so much alkylamine is added that the emulsion to be prepared has a pH of at least 7.5 receives. In this way it is possible to produce emulsions that have a silicone film deliver after the water and solvents have dried off as a result of the The volatility of the ethyl acetate no longer causes a body capable of emulsification contains. This fact allows the emulsions to be used in a very versatile manner and especially for those Use cases where high water resistance of the silicone film is required.

Beispiel r Gewichtsteil Polysiloxanharz wird in einem Gemisch von z Gewichtsteil Äthylacetat, 1,5 Gewichtsteilen Aceton, 1,5 Gewichtsteilen Isopropylalkohol und 8,5 Gewichtsteilen Äthylalkohol gelöst. Diese Mischung wird mit so viel Triäthylamin versetzt, daß die Lösung einen pH-Wert von 8 erhält. Die Lösung ist beliebig lange haltbar und kann in bekannter Weise in Wasser emulgiert werden. Die entstandene Emulsion ist länger als 24 Stunden haltbar, was für die üblichen Verwendungszwecke solcher Emulsionen ausreicht.Example r part by weight of polysiloxane resin is in a mixture of z part by weight of ethyl acetate, 1.5 parts by weight of acetone, 1.5 parts by weight of isopropyl alcohol and 8.5 parts by weight of ethyl alcohol dissolved. This mixture is made with as much triethylamine added so that the solution has a pH of 8. The solution is as long as you want durable and can be emulsified in water in a known manner. The resulting The emulsion can be kept for more than 24 hours, which is suitable for the usual purposes such emulsions is sufficient.

Claims (1)

PATENTANSPRUCH: Weitere Ausbildung des Verfahrens zur Herstellung von wäßrigen Emulsionen von siliciumorganischen Verbindungen nach Patent 894 771, dadurch gekennzeichnet, daß Polysiloxane in einer Mischung von einwertigen Alkoholen, Äthylacetat und Alkylaminen gelöst werden, wobei der Zusatz von Alkylamin so bemessen wird, daß die herzustellende Emulsion einen pH-Wert oberhalb 7,5 besitzt.PATENT CLAIM: Further development of the process for the production of aqueous emulsions of organosilicon compounds according to patent 894 771, characterized in that polysiloxanes are dissolved in a mixture of monohydric alcohols, ethyl acetate and alkylamines, the addition of alkylamine being calculated so that the emulsion to be produced has a pH above 7.5.
DEG9952A 1952-10-10 1952-10-10 Process for the production of aqueous polysiloxane emulsions Expired DE910340C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG9952A DE910340C (en) 1952-10-10 1952-10-10 Process for the production of aqueous polysiloxane emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG9952A DE910340C (en) 1952-10-10 1952-10-10 Process for the production of aqueous polysiloxane emulsions

Publications (1)

Publication Number Publication Date
DE910340C true DE910340C (en) 1954-04-29

Family

ID=7119191

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG9952A Expired DE910340C (en) 1952-10-10 1952-10-10 Process for the production of aqueous polysiloxane emulsions

Country Status (1)

Country Link
DE (1) DE910340C (en)

Cited By (1)

* 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

Cited By (1)

* 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

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