Novel organosilicon compounds and process for the preparation thereof
申请人:Sterin Sebastien
公开号:US20090216001A1
公开(公告)日:2009-08-27
The invention concerns synthesis of functionalized organosilicium compounds comprising at least one activated azo group of formula (I): [(G
0
)
3
SiO
1/2
]
m
[(G
0
)
2
SiO
2/2
]
n
[G
0
SiO
3/2
]
o
[SiO
4/2
]
p
[(G
2
)
a
(G
1
)
a′
(Z-CO—HN═NH—CO-A)SiO
(3-a-a′)/2
]. Said compounds can for example be a mixture of silane species of formula (i
a
): (C
2
H
5
O)
3
Si—(CH
2
)
3
—NH—CO—N═N—COOC
2
H
3
; with siloxane species of formulae: (2i.1
a
): [(CH
3
)
3
SiO
1/2
][(C
2
H
5
O)
2
(CH
2
)
3
—NH—CO—N═N—COOC
2
H
5
}SiO
1/2
] et (2i.2
a
): [(CH
3
)
3
SiO
1/2
]
2
[(C
2
H
5
O)(CH
2
)
3
—NH—CO—N═N—COOC
2
H
5
}SiO
2/2
]. The invention also concerns the method for preparing said compounds (I), which consists in using at least one hydrazino precursor (II) (—HN—NH—) of compound (I), oxidizing the precursor (II) into an azo group for the compound (I) using at least one oxidizing agent (Ox) and at least one vase (B), said method consisting in selecting the base B among mineral bases and Ox among halogens, cyanurated compounds and chlorinated compounds and mixtures thereof, and in using a supplementary reagent selected among silanes (alone or mixed together) of formula (III): (G
o
)
4-p1
Si(G
2′
)
p1
[or example, (CH
3
)
3
(C
2
H
5
O)Si].