US4486476A
Expired / Lapsed
US
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Preparation for making inorganic building materials water-repellent
Assignee: Evonik Operations GmbH
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Filing: 1984-04-05
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Granted: 1984-12-04
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Expires: 2004-04-05
Abstract
Abstract A composition for making building materials water-repellent, before or after they are shaped, the composition containing organoalkoxysiloxanes of the formula ##STR1## in which R 1 is an alkyl or aryl radical, R 2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2. The composition contains (a) 1 to 20% by weight of a mixture of organoalkoxypolysiloxanes of the aforementioned formula, 25 to 75% weight of organoalkoxysiloxanes having a b-value of 0.1 to 0.5 (siloxanes A) and 75 to 25% by weight of the organopolysiloxanes having a b-value 0.8 to 2.0 (siloxanes B), and in which the sum of a and b is not greater than 3, (b) 80 to 90% by weight of a water immiscible solvent and, if necessary, (c) known condensation catalysts. The organoalkoxysiloxane mixture has a surprisingly increased stability on alkaline walling. At the same time, a high depth of penetration and good surface effectiveness are observed.
Inventors
- 👤 Herwig Fritsch
- 👤 Gotz Koerner
- 👤 Herbert Quilitsch
- 👤 Eckehard Schamberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:24
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/18; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/495; C04B41/4961; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A composition for making building materials water-repellent, before or after shaping of the materials, comprising (a) 1 to 20 % by weight of a mixture of organoalkoxypolysiloxanes having the formula I ##STR5## in which R 1 is an alkyl or aryl radical, R 2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2; said mixture being composed of 25to 75% by weight of said organoalkoxypolysiloxane wherein b is from 0.1 to 0.5 designated siloxane A; and 75 to 25% by weight of said organoalkoxypolysiloxane wherein b is from 0.8 to 2.0 designated siloxane B; and wherein the sum of a and b is not greater than 3; (b) 80 to 99% by weight of a water immiscible solvent.
Claim 2
Dependent Claim
129 words
A composition for making building materials water-repellent, before or after shaping of the materials, comprising (a) 1 to 20 % by weight of a mixture of organoalkoxypolysiloxanes having the formula I ##STR5## in which R 1 is an alkyl or aryl radical, R 2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2; said mixture being composed of 25to 75% by weight of said organoalkoxypolysiloxane wherein b is from 0.1 to 0.5 designated siloxane A; and 75 to 25% by weight of said organoalkoxypolysiloxane wherein b is from 0.8 to 2.0 designated siloxane B; and wherein the sum of a and b is not greater than 3; (b) 80 to 99% by weight of a water immiscible solvent.
Claim 3
Dependent Claim
11 words
The composition of claim 1 which further comprises a condensation catalyst.
Claim 4
Dependent Claim
17 words
The composition of claim 1 or 2 wherein siloxane A has a b-value of 0.15 to 0.25.
Claim 5
Dependent Claim
18 words
The composition of claim 1 or 2 wherein siloxane A has a molecular weight of 5,000 to 20,000.
Claim 6
Dependent Claim
16 words
The composition of claim 3 wherein siloxane A has a molecular weight of 5,000 to 20,000.
Claim 7
Dependent Claim
17 words
The composition of claim 1 or 2 wherein siloxane B has a b-value of 0.8 to 1.2.
Claim 8
Dependent Claim
18 words
The composition of claim 1 or 2 wherein siloxane B has a molecular weight of 250 to 1000.
Claim 9
Dependent Claim
16 words
The composition of claim 6 wherein siloxane B has a molecular weight of 250 to 1000.
Claim 10
Dependent Claim
12 words
The composition of claim 1 or 2 wherein R 1 is methyl.
Claim 11
Dependent Claim
12 words
The composition of claim 1 or 2 wherein R 2 is ethyl.
Claim 12
Dependent Claim
9 words
The composition of claim 1 or 2 wherein a=1.
Claim 13
Independent Claim
148 words
A method for making inorganic building materials water repellent comprising impregnating the building material with a water-repellent effective amount of a composition for making building materials water-repellent, before or after shaping of the materials, comprising (a) 1 to 20% by weight of a mixture of organoalkoxypolysiloxanes having the formula I ##STR6## in which R 1 is an alkyl or aryl radical, R 2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2; said mixture being composed of 25to 75% by weight of said organoalkoxypolysiloxane wherein b is from 0.1 to 0.5 designated siloxane A; and 75 to 25% by weight of said organoalkoxypolysiloxane wherein b is from 0.8 to 2.0 designated siloxane B; and wherein the sum of a and b is not greater than 3; (b) 80 to 99% by weight of a water immiscible solvent.
Claim 14
Independent Claim
148 words
A method for making inorganic building materials water repellent comprising impregnating the building material with a water-repellent effective amount of a composition for making building materials water-repellent, before or after shaping of the materials, comprising (a) 1 to 20% by weight of a mixture of organoalkoxypolysiloxanes having the formula I ##STR6## in which R 1 is an alkyl or aryl radical, R 2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2; said mixture being composed of 25to 75% by weight of said organoalkoxypolysiloxane wherein b is from 0.1 to 0.5 designated siloxane A; and 75 to 25% by weight of said organoalkoxypolysiloxane wherein b is from 0.8 to 2.0 designated siloxane B; and wherein the sum of a and b is not greater than 3; (b) 80 to 99% by weight of a water immiscible solvent.
Claim 15
Dependent Claim
11 words
Water-repellent inorganic building materials formed by the method of claim 12.
References Cited (Backward Citations)
US4413104A
Cited
US4408009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |