AZOCARBONYL-FUNCTIONALIZED SILANES
The invention provides azocarbonyl-functionalized silanes of the general formula I (R 1 ) 3-a (R 2 ) a Si-R I -NH-C(O)-N=N-R 4 . They are prepared by a procedure in which in a first step hydrazine of the formula H 2 N-NH-R 4 reacts with an isocyanatosilane of the general formula (R 1 ) 3-a (R 2 ) a...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | The invention provides azocarbonyl-functionalized silanes of the general formula I (R 1 ) 3-a (R 2 ) a Si-R I -NH-C(O)-N=N-R 4 . They are prepared by a procedure in which in a first step hydrazine of the formula H 2 N-NH-R 4 reacts
with an isocyanatosilane of the general formula (R 1 ) 3-a (R 2 ) a Si-R I -NCO,
and in a second step the product of the first step is oxidized with an oxidant, or
in which in a first step hydrazine of the formula H 2 N-NH-R 4 reacts
with an acyl halide of the general formula Cl-C(O)-O-R 5 ,
in a second step the product of the first step is oxidized with an oxidant and
in a third step the product of the second step reacts with an aminosilane of the general formula (R 1 ) 3-a (R 2 ) a Si-R I -NH 2 . It may be used for moldings. |
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