Process for the preparation of 2,2'-methylene- or 2,2'-ethylidinebis(4,6-dialkylphenols) or of 2,2'-methylenebis(4-methyl-6-cyclohexylphenol)

Process for the preparation of 2,2'-methylene- or 2,2'-ethylidinebis(4,6-dialkylphenols) or of 2,2'-methylenebis(4-methyl-6-cyclohexylphenol)

2,2'-methylene- or 2,2'-ethylidinebis(4,6-dialkylphenols) or 2,2'-methylenebis(4-methyl-6-cyclohexylphenol) are obtained by reacting 2,4-dialkylphenols or 4-methyl-2-cyclohexylphenol, respectively, with a condensing agent in the presence of an acid-containing catalyst at a temperature...

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Bibliographische Detailangaben
Hauptverfasser: OLGA FEDOROVNA STARIKOVA, EVGENY LVOVICH STYSKIN, JURY IVANOVICH MICHUROV, YAKOV ABRAMOVICH GURVICH, ALEXANDR AFROIMOVICH GRINBERG, SIMONA TEVIEVNA KUMOK, GRIGORY IOSIFOVICH RUTMAN, ALEXANDR GRIGORIEVICH LIAKUMOVICH, VLADIMIR AVGUSTOVICH YANSHEVSKY
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:2,2'-methylene- or 2,2'-ethylidinebis(4,6-dialkylphenols) or 2,2'-methylenebis(4-methyl-6-cyclohexylphenol) are obtained by reacting 2,4-dialkylphenols or 4-methyl-2-cyclohexylphenol, respectively, with a condensing agent in the presence of an acid-containing catalyst at a temperature of 30-140 DEG C. Suitable acetals are used as condensing agents. 1 mol of suitable phenol is employed per 1-10 mols of acetal. The acetal simultaneously acts as the diluent. The desired product is isolated from the reaction mixture. The compounds prepared can be used as stabilisers for polymer materials.