FOERFARANDE FOER FRAMSTAELLNING AV ALKYLRESORCINOL-FENOL-FORMALDEHYD HARTS

The process comprises reacting the phenol with formaldehyde in the presence of an alkali metal catalyst in an aqueous solution at a temperature of from 60 to 70 DEG C for from 4 to 8 hours with subsequent polycondensation in an aqueous ethanol solution with addition of a fraction of shale alkylresor...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	5)A S FREIDIN, 1)P G KRISTYANSON, 3)A-E F KEEZEL, 4)J-A A STARKOPF, 2)K R KIISLER
Format:	Patent
Sprache:	swe
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON DYES MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	The process comprises reacting the phenol with formaldehyde in the presence of an alkali metal catalyst in an aqueous solution at a temperature of from 60 to 70 DEG C for from 4 to 8 hours with subsequent polycondensation in an aqueous ethanol solution with addition of a fraction of shale alkylresorcinols having a boiling point of 270-290 DEG C in a ratio between the components, in per cent by weight, of phenol:formaldehyde:alkylresorcinol fraction:ethanol:water of 1:0.41-0.67:1.55-2.3:0.3-1:0.8-1.5. The polycondensation can be carried out with addition of 0.3-0.6 part by weight of ethylene glycol. The temperature of the polycondensation is kept at the boiling point of from 93 to 98 DEG C for 2.5-6 hours.