Water-in-oil creams of organosilicon compounds
View Patent ↗The invention relates to hydrocarbon-free aqueous creams of organosilicon compounds, their preparation and their use. The hydrocarbon-free water-in-oil creams of organosilicon compounds comprise the components: (A) one or more C 1 -C 20 -alkyl-C 1 -C 6 -alkoxysilanes (A 1 ), alkoxy-containing organopolysiloxanes (A 2 ) and/or organopolysiloxanes (A 3 ) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least 0.01, (B) one or more emulsifiers and (C) water.
1. A method for waterproofing building materials which comprises applying a hydrocarbon-free water-in-oil cream of organosilicon compounds, which comprises the components
(A) at least one or more optionally halogen-substituted alkyl-alkoxysilanes (A1); and/or one or more organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least about 0.01; and
optionally an alkoxy containing polysiloxane (A2);
(B) one or more emulsifiers and
(C) water;
to said building materials.
2. The method of waterproofing building materials of claim 1 , wherein the alkoxy-containing organopolysiloxanes (A2) comprise units of the formula (I)
R
x
Si
(
OR
1
)
ySi
(
OH
)
z
O
4
-
x
-
y
-
z
2
(
I
)
where
R are identical or different monovalent, unsubstituted or halogen-substituted, SiC-bonded C 1 -C 20 -hydrocarbon radicals,
R 1 are identical or different monovalent C 1 -C 6 -alkyl radicals,
x is 0, 1, 2 or 3, on average from 0.8 to 1.8,
y is 0, 1, 2 or 3, on average from 0.01 to 2.0, and
z is 0, 1, 2 or 3, on average from 0.0 to 0.5, with the proviso that the sum of x, y and z is not more than 3.5.
3. A method for waterproofing building materials which comprises applying to said building materials a hydrocarbon-free water-in-oil cream of organosilicon compounds, which comprises the components
(A) at least one or more optionally halogen-substituted C 1 -C 20 -alkyl-C 1 -C 6 -alkoxysilanes (A1); and/or
one or more organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least 0.01;
and optionally an alkoxy containing polysiloxane (A2);
(B) one or more emulsifiers and
(C) water.
4. The method of waterproofing building materials of claim 3 , wherein the C 1 -C 20 -alkyl-C 1 -C 6 -alkoxysilanes (A1) have 1 or 2 identical or different, unsubstituted or halogen-substituted, SiC-bonded monovalent C 1 -C 20 -alkyl radicals and the other radicals are identical or different C 2 -C 6 -alkoxy radicals.
5. The method of waterproofing building materials of claim 3 , wherein the C 1 -C 20 -alkyl-C 1 -C 6 -alkoxysilanes (A1) are present in an amount of from about 5 to 100% by weight, based on the amount of active ingredients (A1) and (A3).
6. The method of waterproofing building materials of claim 3 , wherein the alkoxy-containing organopolysiloxanes (A2) are present in an amount of from about 5 to 100% by weight, based on the amount of active ingredients (A1) and (A3).
7. The method of waterproofing building materials of claim 3 , wherein the organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units comprising units of the formula (II)
R
a
2
R
b
3
(
OR
4
)
cSiO
4
-
a
-
b
-
C
2
(
II
)
where
R 2 are identical or different monovalent, unsubstituted or halogen-substituted, SiC-bonded C 1 -C 20 -hydrocarbon radicals which are free of basic nitrogen,
R 3 are identical or different monovalent, unsubstituted or halogen-substituted, SiC-bonded C 1 -C 30 -hydrocarbon radicals which contain basic nitrogen,
R 4 may be identical or different and are each a hydrogen atom or a C 1 -C 6 -alkyl radical,
a is 0, 1, 2 or 3,
b is 0, 1, 2 or 3, on average at least 0.05, and
c is 0, 1, 2 or 3,
with the proviso that the sum of a, b and c is less than or equal to 3.
8. The method of waterproofing building materials of claim 3 , wherein the organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units containing basic nitrogen are present in an amount of from about 5 to 100% by weight, based on the amount of active ingredients (A1), (A2) and (A3).
9. The method of waterproofing building materials of claim 3 , wherein the emulsifiers (B) have an HLB of from about 2 to 5.
10. The method of waterproofing building materials of claim 3 , wherein the emulsifiers (B) are selected from the group consisting of sorbitan esters, fatty alcohol ethoxylates, lanolin derivatives, fatty acid esters, glucose esters and emulsifiers based on polyglycerol or pentaerythritol.
11. The method of waterproofing building materials of claim 3 , wherein the emulsifier is cetyl dimethicone copolyol.
12. The method of waterproofing building materials of claim 3 , wherein the emulsifiers (B) are present in an amount of from about 1 to about 40% by weight, based on the amount of active ingredients (A1), (A2) and (A3).
13. The method of waterproofing building materials of claim 3 , wherein the emulsifiers (B) are present in an amount from about 5 to about 40% by weight, based upon the amount of active ingredients (A1), (A2) and (A3).
14. The method of waterproofing building materials of claim 3 , wherein the amount of the components (A)+(B) is from about 5 to about 50% by weight, based upon total weight of the cream.
15. The method of waterproofing building materials of claim 3 , wherein the amount of the components (A) and (B) is from 20 to 40% by weight, based upon total weight of the cream.
16. A process for hydrophobing finely divided inorganic materials which comprises contacting a hydrocarbon-free water-in-oil cream of organosilicon compounds, which comprises the components
(A) at least one or more optionally halogen-substituted alkyl-alkoxysilanes (A1); and/or one or more organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least about 0.01; and
optionally an alkoxy containing polysiloxane (A2);
(B) one or more emulsifiers and
(C) water;
with said inorganic materials.
17. The process according to claim 16 wherein the finely divided inorganic materials are perlite, vermiculite, or a thermal insulation material.