DE493988C - Process for the production of condensation products - Google Patents

Process for the production of condensation products

Info

Publication number
DE493988C
DE493988C DEB115278D DEB0115278D DE493988C DE 493988 C DE493988 C DE 493988C DE B115278 D DEB115278 D DE B115278D DE B0115278 D DEB0115278 D DE B0115278D DE 493988 C DE493988 C DE 493988C
Authority
DE
Germany
Prior art keywords
condensation products
production
hydrogen peroxide
parts
formaldehyde
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
DEB115278D
Other languages
German (de)
Inventor
Dr Wilhelm Geisel
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 DEB115278D priority Critical patent/DE493988C/en
Application granted granted Critical
Publication of DE493988C publication Critical patent/DE493988C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
    • C08G12/12—Ureas; Thioureas

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Phenolic Resins Or Amino Resins (AREA)

Description

Verfahren zur Herstellung von Kondensationsprodukten Bei der Kondensation von Harnstoff und Formaldehyd werden glasklare Produkte erhalten, wenn man gemäß Patent 409847 Harnstoff und Formaldehyd in Gegenwart von Mineralsäuren bei erhöhter Temperatur aufeinander zur Einwirkung bringt. An Stelle der Mineralsäuren können hierbei auch organische Säuren verwendet werden.Process for the preparation of condensation products During condensation of urea and formaldehyde, crystal clear products are obtained if one according to Patent 409847 urea and formaldehyde in the presence of mineral acids at increased Brings temperature to act on each other. Instead of mineral acids you can organic acids can also be used here.

Es wurde nun gefunden, daß man auch bei Anwendung geringer Mengen Wasserstoffsuperoxyd als Kondensationsmittel -zu glasklaren Produkten gelangt. Da hierbei aus dem Z'fasserstoffsuperoxyd und Formaldehyd nur etwa so viel Ameisensäure gebildet wird, als der Hälfte des angewandten Wasserstoffsuperoxyds entspricht, und diese Menge Ameisensäure in fertiger Form eine ungenügende Wirkung ergibt, beruht die Wirkung des Wasserstoffsuperoxyds auf anderweitigen, nicht voraussehbaren Vorgängen. Die so erhaltenen Kondensationsprodukte zeigen gegenüber den Produkten der obenerwähnten Herstellungsweisen besondere Vorteile, indem sie rascher erhärten und einen niedrigeren Säuregehalt besitzen. Letztere Eigenschaft ist bei der Verwendung der Kondensationsprodukte als Lackgrundstoffe von wesentlicher Bedeutung. Beispiel i Man erwärmt 196 Teile käuflicher Formaldehydlösung auf etwa 70' und läßt hierzu unter Rühren nacheinander i Teil Wasserstoffsuperoxyd (3oprozentig) und 44 Teile Harnstoff, gelöst in 44 Teilen asser von 70', in langsamem Strahle fließen. Nachdem die Reaktion eingetreten ist, -erhitzt man noch eine halbe Stunde auf ioo° und engt sodann im Vakuum bis zur Zähflüssigkeit ein. Man erhält nach dem Abkühlen eine klar durchsichtige Masse.It has now been found that even when small amounts of hydrogen peroxide are used as a condensing agent, crystal-clear products are obtained. Since in this case only as much formic acid is formed from the hydrogen peroxide and formaldehyde as corresponds to half of the hydrogen peroxide used, and this amount of formic acid in its finished form has an insufficient effect, the effect of the hydrogen peroxide is based on other, unforeseeable processes. The condensation products obtained in this way show particular advantages over the products of the above-mentioned production methods in that they harden more quickly and have a lower acid content. The latter property is essential when the condensation products are used as paint base materials. EXAMPLE 1 196 parts of commercially available formaldehyde solution are heated to about 70 ' and, while stirring, 1 part of hydrogen peroxide (3%) and 44 parts of urea, dissolved in 44 parts of 70' water, are allowed to flow in a slow stream. After the reaction has occurred, it is heated to 100 ° for another half hour and then concentrated in vacuo until it is viscous. After cooling, a clear, transparent mass is obtained.

Beispiel In 98 Teile auf 765 erwärmte Formaldehydlö'sung läßt man unter Rühren nacheinander i Teil Wasserstoffsuperoxydlösung (3oprozentig) und 22 Teile Harnstoff, gelöst in 2z Teilen Wasser von 70°, langsam einfließen. Die Weiterverarbeitung :erfolgt, wie im Beispiel i beschrieben.EXAMPLE The formaldehyde solution heated to 765 is allowed in 98 parts with stirring one after the other i part of hydrogen peroxide solution (3%) and 22 Parts of urea, dissolved in 2 parts of water at 70 °, slowly flow in. The further processing : takes place as described in example i.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Kondensationsprodukten aus Harnstoff und Formaldehyd, dadurch gekennzeichnet, daß man diese Verbindungen . in Gegenwart von Wasserstoffsuperoxyd bei erhöhter Temperatur aufeinander einwirken läßt. PATENT CLAIM: Process for the preparation of condensation products from urea and formaldehyde, characterized in that these compounds are used. allowed to act on each other in the presence of hydrogen peroxide at elevated temperature.
DEB115278D 1924-08-19 1924-08-19 Process for the production of condensation products Expired DE493988C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB115278D DE493988C (en) 1924-08-19 1924-08-19 Process for the production of condensation products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB115278D DE493988C (en) 1924-08-19 1924-08-19 Process for the production of condensation products

Publications (1)

Publication Number Publication Date
DE493988C true DE493988C (en) 1930-03-18

Family

ID=6993977

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB115278D Expired DE493988C (en) 1924-08-19 1924-08-19 Process for the production of condensation products

Country Status (1)

Country Link
DE (1) DE493988C (en)

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