US 7,126,020 B2Granted

Process for preparing highly viscous organopolysiloxanes

AssigneeWacker Chemie AG

InventorsChristian Herzig, Siegfried Dormeier

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Abstract

Process for preparing highly viscous organopolysiloxanes by reacting siloxanes (1) composed of units of the general formula A a ⁢ R c ⁡ ( OR 1 ) d ⁢ SiO 4 - ( a + c + d ) 2 ( I ) where A is a nitrogen-containing Si—C-bonded radical, R is a C1-18 hydrocarbon radical R1 is hydrogen or a C1-8 alkyl radical, a and d are 0 or 1, c is 0, 1, 2 or 3, a+c+d is <3 and one A and one R1 where of R1 is hydrogen atom are present, optionally siloxanes (2) R c ⁡ ( OR 1 ) d ⁢ SiO 4 - ( c + d ) 2 ( II ) where c+d is ≦3 and one R1 radical is hydrogen is present, with silanes (3) BReSi(OR3)3−e (III) where B is a radical —CR22—Y, R2 is hydrogen or C1-4 alkyl, Y is halogen, a monosubstituted O and S atom, or a substituted N or P atom, R3 is C1-8 alkyl, and e is 0, 1 or 2.

Claims11

Dependent claims

A process for preparing viscous organopolysiloxanes, which comprises reacting siloxanes (1) comprising units of the formula

A
a
⁢
R
c
⁡
(
OR
1
)
d
⁢
SiO
4
-
(
a
+
c
+
d
)
2
(
I
)
where
A is a monovalent, Si—C-bonded radical containing basic nitrogen,
R is a monovalent, optionally substituted hydrocarbon radical having from 1 to 18 carbon atoms per radical,
R1 is a hydrogen atom or an alkyl radical having from 1 to 8 carbon atoms,
a is 0 or 1,
c is 0, 1, 2 or 3, and
d is 0 or 1,
with the provisos that the sum of a+c+d is ≦3, on average at least one A radical, and at least one R1 radical in which R1 is a hydrogen atom are present per molecule,
and optionally siloxanes (2) comprising of units of the formula
R
c
⁡
(
OR
1
)
d
⁢
SiO
4
-
(
c
+
d
)
2
,
(
II
)
with the provisos that the sum of c+d is ≦3 and at least one R1 radical is a hydrogen atom, with silanes (3) of the formula
BReSi(OR3)3−e (III)
where
B is a monovalent radical of the formula —CR22—Y,
R2 is a hydrogen atom or an alkyl radical having from 1 to 4 carbon atoms,
Y is a monofunctional radical selected from the group consisting of the halogens, monosubstituted O and S atoms, and substituted N and P atoms,
R3 is an alkyl radical having from 1 to 8 carbon atoms per radical, and
e is 0, 1 or 2.

62 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/007,387Filed 8 Dec 2004
Priority: DE 103 58 06011 Dec 2003
Published: US 2005/0131243 A116 Jun 2005
Granted: 24 Oct 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

C08G 77/26
Containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen: nitrogen-containing groups
C07F 7/0874
Preparation and treatment thereof: reactions involving a bond of the Si-O-Si linkage
C08G
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
C07F
Acyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen