Process for the preparation of halogenated arylsiloxanes

• Main Authors: MUENCH,VOLKER,DR, ECHTE,ADOLF,DR
• Format: Patent
• Language: English; German
• Published: 24.10.1985
• Edition: 4
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; COMPOSITIONS BASED THEREON; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention relates to a process for the preparation of halogenated arylsiloxanes of the general formula (HalnAryl)xSi(OArylHalm)4-x by reacting silicon halides of the general formula (HalnAryl)xSiHal4-x with halogenated phenols of the general formula HalmAryl-OH in the presence of an alkyl aromatic compound having 8 to 12 C atoms, with stirring and in the presence of nitrogen-containing bases of the general formula (as acid binder) in which R , R and R in each case represent C1-C20-aryl radicals, it being possible for the substituents on the tertiary N atom to be identical or different, at temperatures below 30 DEG C, 1 mole of the compound IV being employed per mole of halogen to be eliminated and the precipitate which consists essentially of the adduct ÄR R R +NHÜHal and the desired reaction product being subjected to extraction with water, giving the desired product (insoluble component), which is subsequently dried.