Curable mixture

Patent metadata

Field	Value
Publication number	US-9040608-B2
Application number	US-201113638733-A
Country	US
Kind code	B2
Filing date	Mar 30, 2011
Priority date	Apr 1, 2010
Publication date	May 26, 2015
Grant date	May 26, 2015

Abstract

The present invention relates to a curable mixture suitable for obtaining “easy-to-clean” properties in the cured mixture, comprising at least one mineral binder, a powder comprising at least one fluoroorganyl-substituted silicon compound encapsulated in a water-soluble polymer, the amount of the silicon compound being 0.001% to 8% by weight, based on the present mixture, and optionally further adjuvants, and also to a process for preparing the mixture and to the use thereof. The invention further relates to a water-redispersible powder and also to a corresponding intermediate for use in the curable mixture in order to obtain “easy-to-clean” properties in the cured mixture. Also claimed, furthermore, is a process for preparing the powder, and the use thereof.

First claim

The invention claimed is:

1. A curable mixture, comprising:
(I) a mineral binder;
(II) a powder comprising a fluoroorganyl-substituted silicon compound encapsulated in a water-soluble polymer, wherein an amount of the fluoroorganyl-substituted silicon compound is from 0.001% to 8% by weight, based on the curable mixture; and
(III) optionally, an additive.

2. The curable mixture of claim 1 , wherein the mineral binder comprises a hydraulically setting binder selected from the group consisting of a Portland cement, a composite cement, a cement comprising a fraction of pozzolans, and a blast furnace cement.

3. The curable mixture of claim 1 , wherein the fluoroorganyl-substituted silicon compound is a fluoroorganyl-substituted silane, a fluoroorganyl-substituted siloxane, a fluoroorganyl-substituted silicone, or any mixture thereof.

4. The curable mixture of claim 1 , wherein the fluoroorganyl-substituted silicon compound is a fluoroalkylalkoxysilane of formula (I):
F 3 C(CF 2 ) x (C 2 H 4 ) y Si(CH 3 ) z (OR) 3−z   (I),

wherein:
each R is independently a methyl, ethyl, n-propyl, or isopropyl;
x is an integer from 0 to 16;
y is 0 or 1; and
z is 0 or 1.

5. The curable mixture of claim 4 , wherein the fluoroorganyl-substituted silicon compound is tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane, tridecafluoro-1,1,2,2-tetrahydrooctyltrimethoxysilane, or a mixture thereof.

6. The curable mixture of claim 1 , wherein the fraction of the fluoroorganyl-substituted silicon compound in the powder is 2.5% to 90% by weight.

7. The curable mixture of claim 1 , wherein the fluoroorganyl-substituted silicon compound is encapsulated in a water-soluble polymer and the water-soluble polymer and the silicon compound form particles which are dispersible and/or redispersible in water, and
wherein the water-soluble polymer is selected from the group consisting of a polysaccharide, a polysaccharide ether, a protein, a vinyl polymer, a formaldehyde condensate, and an alkylene oxide polymer.

8. The curable mixture of claim 1 , wherein the liquid fluoroorganylalkoxy-substituted silicon compound is encapsulated in a water-soluble polymer, has an average droplet size of 10 nm to 10 μm, and is substantially nonhydrolyzed.

9. The curable mixture of claim 1 , comprising an additive (III), which is an aggregate and an auxiliary, wherein the aggregate is selected from the group consisting of a sand, a gravel, a grit, porphyry, quartz flour, ground limestone, ground rock, a flyash, microsilica, and other silicatic additives.

10. The curable mixture of claim 1 , comprising, based on a total mass of the curable mixture:
2% to 60% by weight of a hydraulic binder;
30% to 90% by weight of an aggregate;
0.001% to 8% by weight of a fluoroorganyl-substituted silicon compound; and
optionally 0% to 40% by weight of a further component.

11. The curable mixture of claim 10 , in the form of a concrete mixture, further comprising, based on a total mass of the concrete mixture:
0.01% to 2% by weight of a plasticizer; and/or
0.01% to 10% by weight of a further auxiliary; or
in the form of a dry mortar further comprising based on a total mass of the dry mortar:
0.001% to 3% by weight of a cellulose ether and/or a cellulose fiber;
0.1% to 40% by weight of a dispersion powder comprising a water-insoluble, film-forming polymer; and
0% to 10% by weight of a further auxiliary.

12. The curable mixture of claim 1 , further comprising:
1% to 50% by weight of water, based on a total weight of the curable mixture.

13. A water-redispersible powder, which hydrophobizes and oleophobizes a cured mixture of claim 1 , comprising:
a water-soluble polymer comprising an organic silicon compound encapsulated therein; and
an organic silicon compound, which is wholly or partly fluorinated,
wherein the fraction of the fluorine-substituted silicon compound is at least 25% by weight, based on the total amount of the silicon compound.

14. The powder of claim 13 , wherein the fluoroorganyl-substituted silicon compound is a fluoroalkylalkoxysilane of formula (I):
F 3 C(CF 2 ) x (C 2 H 4 ) y Si(CH 3 ) z (OR) 3−z   (I),

wherein:
each R is independently a methyl, ethyl, n-propyl, or isopropyl;
x is an integer from 0 to 16;
y is 0 or 1; and
z is 0 or 1.

15. The powder of claim 14 , wherein the fluoroorganyl-substituted silicon compound is tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane, tridecafluoro-1,1,2,2-tetrahydrooctyltrimethoxysilane, or a mixture thereof.

16. A method for producing the curable mixture of claim 1 , the method comprising:
mixing (II) a mineral binder with (II) a powder comprising i) a water-soluble polymer comprising an organic silicon compound encapsulated therein and ii) an organic silicon compound, which is wholly or partly fluorinated, wherein the fraction of the fluorine-substituted silicon compound is at least 25% by weight, based on the total amount of the silicon compound.

17. A method for producing the powder of claim 13 , the method comprising
mixing:
water;
a water-soluble polymer;
a water-insoluble fluoroorganyl-substituted silicon compound; and
optionally, an additive,

to obtain an intermediate at a pH between 4 and 9; and then
drying the intermediate.

18. A process for hydrophobizing and oleophobizing a cured mixture comprising a mineral binder, the process comprising:
mixing the powder of claim 13 with a mixture comprising the mineral binder, to obtain a curable mixture; and
curing the curable mixture.

19. A concrete good or concrete molding, comprising the powder of claim 13 .

20. A process for body modification of a hydraulically setting mixture, the process comprising:
adding the powder of claim 13 to a hydraulically setting mixture.

21. A process for hydrophobizing and oleophobizing a cured mixture, the process comprising:
mixing cement, an aggregate, a fluoroorganyl-substituted silicon compound which is encapsulated in a water-soluble polymer, and optionally, a further auxiliary, to obtain a hydraulically curable mixture comprising 2% to 60% by weight of the cement, 30% to 90% by weight of the aggregate, 0.001% to 8% by weight of the fluoroorganyl-substituted silicon compound, and optionally the further auxiliary.

22. A concrete good or concrete molding, comprising the mixture of claim 1 .

23. A facing concrete, comprising the mixture of claim 1 .

24. A method of both hydrophobizing and oleophobizing a cured product, the method comprising:
including, in a curable mixture in need thereof, a powder comprising a fluoroorganyl-substituted silicon compound encapsulated in a water-soluble polymer, and
curing the curable mixture, thereby obtaining the cured product,
wherein the curable mixture is the curable mixture of claim 14 .

Assignees

• Friedel Manuel
• Albert Philipp
• Standke Burkhard
• Ljesic Spomenko
• Kehrer Ulf
• Evonik Degussa Gmbh
• Akzo Nobel Chemicals Int Bv

Inventors

• Friedel Manuel
• Albert Philipp
• Standke Burkhard
• Ljesic Spomenko
• Kehrer Ulf

Classifications

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B24/2623

  Polyvinylalcohols; Polyvinylacetates · CPC title

• C04B2103/0053

  Water-soluble polymers · CPC title

• C04B24/42 Primary

  Organo-silicon compounds · CPC title

• C04B2111/27

  Water resistance, i.e. waterproof or water-repellent materials · CPC title