Process for the preparation of halogenated arylsiloxanes
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 aromat...
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Main Authors | , |
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Format | Patent |
Language | English German |
Published |
24.10.1985
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Edition | 4 |
Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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Bibliography: | Application Number: DE19843414494 |