DE833121C - Hardening accelerator for aldehyde condensation products - Google Patents
Hardening accelerator for aldehyde condensation productsInfo
- Publication number
- DE833121C DE833121C DEP39369D DEP0039369D DE833121C DE 833121 C DE833121 C DE 833121C DE P39369 D DEP39369 D DE P39369D DE P0039369 D DEP0039369 D DE P0039369D DE 833121 C DE833121 C DE 833121C
- Authority
- DE
- Germany
- Prior art keywords
- hardening accelerator
- condensation products
- aldehyde
- aldehyde condensation
- hardening
- 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
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
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
-
- 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
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
Härtungsbeschleuniger für Aldehyd-Kondensationsprodukte Gegenstand dieser I?rfindung sind Härtungsbeschleuniger für AIdehvd-Kondensationsprodukte.Curing accelerator for aldehyde condensation products subject of this invention are curing accelerators for aldehyde condensation products.
Es ist bekannt, Aldehyd-Kondensationsprodukte, so z. 13. Kondensationsprodukte des Formaldehyds mit llarttstoff oder Phenol durch Zusatz von Ammoniumsalzen starker Säuren zur Härtung zu bringen. Dabei wird die Härtung durch freie Säure bewirkt. die unter geeigneten Bedingungen aus den Ammoniumsalzen entsteht. Die Härtung kann durch Erhitzen stark beschleunigt werden.It is known to use aldehyde condensation products such. 13. Condensation products of formaldehyde with additives or phenol more strongly through the addition of ammonium salts Bring acids to harden. The hardening is brought about by free acid. which is formed from the ammonium salts under suitable conditions. The hardening can can be greatly accelerated by heating.
Hä rtbare :\ldelwd-Korndensatiottsprodu-kte enthalten in der Regel Formaldehvd und \`'asser, bz-,v. bilden diese Verbindungen während der Weiterkondensation zum Endprodukt. Versetzt man solche härtbaren Kondensationsprodukte mit der zur Härtung erforderlichen Menge eines Ammoniumsalzes einer starken Säure, so setzt sich das durch Hydrolyse des Ammonittmsalzes entstehende Ammoniak mit <lern Aldehyd zu Alde'hyd-Kondensationsprodikten um. Dadurch wird das Hydrolysegleichgewicht des Ammoniumsalzes unter Bildung freier Säure so weit verschoben, daB bereits bei normaler Temperatur bald eine Härtung des Kondensationsproduktes eintritt. Derartige Gemische sind für viele praktische Anwendungszwecke. so z. B. in der Klebetechnik, nicht geeignet, weil diese Anwendungszwecke voraussetzen, daB die Getnische längere Haltbarkeit bei normaler Temp:ratur besitzen und erst in der Hitze schnell härten.Hardenable: \ ldelwd grain detergent products usually contain Formaldehyde and \ `'ater, bz-, v. form these compounds during further condensation to the end product. If such curable condensation products are added to the Hardening required amount of an ammonium salt of a strong acid, so sets the ammonia produced by the hydrolysis of the ammonite salt is mixed with the aldehyde to Alde'hyd condensation products. Thereby the hydrolysis equilibrium of the Ammonium salt shifted so far with the formation of free acid that even with normal Temperature soon a hardening of the condensation product occurs. Such mixtures are for many practical uses. so z. B. in adhesive technology, not suitable because these purposes require that the food has a longer shelf life at normal temperature and only harden quickly in the heat.
Uni (las vorzeitige Härten von Aldehyd-Kondensationsprodukten in Gegenwart von Ämmoniumsalzen starker Säuren zu verhindern, hat man bereits vorgeschlagen, den Mischungen aus Kondensationsprodukt und Härter Ammoniak zuzufügen. Das Ammoniak verbindet sich mit dem in den (,etnischen vorliegenden freien bzw. sich schon bei intrmalei- Temperatur aus dein Kondensationsprodukt altspaltenden Aldehyd. Auf diese `''eise wird <las Gleichgewicht des' als Härter zugesetzten Ainnioniumsalzespraktisch nicht gestört .und damit eine vorzeitige Härtung des Ald0hyd-Kondetisationsproduktes bei normaler Temperatur verhindert.Uni (read premature hardening of aldehyde condensation products in the presence to prevent ammonium salts of strong acids, it has already been suggested that add ammonia to the mixtures of condensation product and hardener. The ammonia connects to that in the (, ethnic existing free resp. old-cleaving from your condensation product already at intrmalei temperature Aldehyde. In this way, the equilibrium of the hardener is added Alumina salt practically not disturbed prevented at normal temperature.
Unter Zusatz von Aimnoniak hergestellte Mischungen der vorerwähnten Art haben jedoch (Zeit Nachtteil. da13 sie alkalisch sind und infolgedessen für manche "Zwecke, so z. B. in der Klebetechnik 1>:i eher Verleimung von alkaliempfindlichen Hölzern. störende Verfärbungen ergeben.Mixtures of the aforementioned, produced with the addition of Aimnoniak However, they have a disadvantage because they are alkaline and consequently for some "purposes, for example in adhesive technology 1>: i rather gluing of alkali-sensitive ones Wooden. result in annoying discoloration.
(;eg-"nst@an(1 dieser Erfindung sind Härtungsbeschletiniger auf Grundlage von Ammoniumsalzen starker S:üuren, denen die Nachteile der obenerwähnten Härtungsbeschleuniger nicht anhaften. I )fiese 11 ischtitigen enthalten die Menge Ammoniumsalz. (hie erforderlich ist, um die bei normaler Tetnlxratur in dem Aldehyd-Kondensationsprodukt vorliegende Menge freien _#Nldehyds zu binden, ferner in Wasser schwer lösliches Karbonat, insbesondere 1-rdalkalicarbonat, wie z. B. Calciumcarbonat, um die hei der Umsetzung des Aldehyds mit (lern Ammoniumsalz entstehende freie Säure zu neutralisieren und schließlich noch die zur I lä rtung des Aldehyd-Kondensationsproduiktes in (her flitze erforderliche :Menge Ammoniumsalz.(; eg- "nst @ an (1 of this invention are hardening accelerators based of ammonium salts of strong acids, which have the disadvantages of the hardening accelerators mentioned above do not adhere. I) nasty 11 ischtitigen contain the amount of ammonium salt. (required here is around that present in the aldehyde condensation product at normal temperature Binding amount of free aldehyde, also carbonate, which is sparingly soluble in water, in particular 1-earth alkali carbonate, such as. B. calcium carbonate, to the heat of the implementation of the aldehyde with (learn to neutralize the free acid formed by ammonium salt and finally nor that necessary for the elimination of the aldehyde condensation product in (her flitze : Amount of ammonium salt.
Als Ammoniumsalz starker Säuren enthalten die Ilä rtergemische dieser Erfindung vorzugsweise Ainnionitimchlorid oder Ammoniumsulfat. Als besonders vorteilhaft halten sich Mischungen dieser Meiden Salze erwiesen, die so viel Ammoniumsulfat enthalten. wie zur Bindung des in d-em Aldehyd-Kondetisationsprodtikt vorhandenen lreietiAldehyds erforderlich ist.The fermentation mixtures contain these as the ammonium salt of strong acids Invention preferably aminionite chloride or ammonium sulfate. As particularly beneficial Stick to mixtures of these shun salts that have been shown to contain so much ammonium sulfate contain. how to bind the aldehyde condensation product present in d-em free aldehyde is required.
Die Bestandteile der Härtungsl)eschletiniger (fieser Erfindung werden
vorzugsweise vor dem "Zusatz zu den Kondensationsprodukten gemischt.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP39369D DE833121C (en) | 1949-04-09 | 1949-04-09 | Hardening accelerator for aldehyde condensation products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP39369D DE833121C (en) | 1949-04-09 | 1949-04-09 | Hardening accelerator for aldehyde condensation products |
Publications (1)
Publication Number | Publication Date |
---|---|
DE833121C true DE833121C (en) | 1952-03-03 |
Family
ID=7376457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP39369D Expired DE833121C (en) | 1949-04-09 | 1949-04-09 | Hardening accelerator for aldehyde condensation products |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE833121C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3026015A1 (en) * | 1979-07-10 | 1981-01-15 | Mitsuo Higuchi | ADHESIVE MADE FROM A UREA FORMALDEHYDE RESIN |
-
1949
- 1949-04-09 DE DEP39369D patent/DE833121C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3026015A1 (en) * | 1979-07-10 | 1981-01-15 | Mitsuo Higuchi | ADHESIVE MADE FROM A UREA FORMALDEHYDE RESIN |
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