DE29611347U1 - Effect-enhancing water repellent - Google Patents
Effect-enhancing water repellentInfo
- Publication number
- DE29611347U1 DE29611347U1 DE29611347U DE29611347U DE29611347U1 DE 29611347 U1 DE29611347 U1 DE 29611347U1 DE 29611347 U DE29611347 U DE 29611347U DE 29611347 U DE29611347 U DE 29611347U DE 29611347 U1 DE29611347 U1 DE 29611347U1
- Authority
- DE
- Germany
- Prior art keywords
- copolymers
- aqueous
- hydrophobic agent
- alkylalkoxysiloxane
- alkylalkoxysilane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 9
- 239000005871 repellent Substances 0.000 title description 2
- 230000002940 repellent Effects 0.000 title 1
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 230000002209 hydrophobic effect Effects 0.000 claims description 21
- 239000000839 emulsion Substances 0.000 claims description 11
- 229920001577 copolymer Polymers 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 9
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 150000002148 esters Chemical class 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 239000004815 dispersion polymer Substances 0.000 claims description 4
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 3
- 239000002174 Styrene-butadiene Substances 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 239000011118 polyvinyl acetate Substances 0.000 claims description 3
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 3
- 239000005033 polyvinylidene chloride Substances 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 229920002845 Poly(methacrylic acid) Chemical class 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 239000004566 building material Substances 0.000 description 9
- 230000006378 damage Effects 0.000 description 7
- 230000035515 penetration Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 150000003961 organosilicon compounds Chemical class 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- -1 siloxanes Chemical class 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 239000011451 fired brick Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 150000004756 silanes Chemical class 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011476 clinker brick Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000003021 phthalic acid derivatives Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000003495 polar organic solvent Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
- C04B41/4922—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as monomers, i.e. as organosilanes RnSiX4-n, e.g. alkyltrialkoxysilane, dialkyldialkoxysilane
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
- C04B41/495—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as oligomers or polymers
- C04B41/4961—Polyorganosiloxanes, i.e. polymers with a Si-O-Si-O-chain; "silicones"
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Description
• «I···· **t Beschreibung: • «I···· **t Description :
Zu den wichtigsten Forderungen im Bauwesen gehört es, die Bauwerke gegen Feuchtigkeit zu schützen. Durch ungenügende Abdichtung entstehen erhebliche Schaden, die bis zur Zerstörung der Bauwerke führen können.One of the most important requirements in construction is to protect buildings against moisture. Inadequate sealing causes significant damage that can even lead to the destruction of the building.
Grundsätzlich gilt, daß abgesehen von mechanischen Einwirkungen alle Schaden die Anwesenheit von Wasser voraussetzen. Dabei kann das Wasser direkt oder indirekt wirken.Basically, apart from mechanical effects, all damage requires the presence of water. The water can act directly or indirectly.
Zu den direkten Einwirkungsformen zählen die Frostschäden. Bedeutsamer aber sind die Schäden, welche bei der indirekten Einwirkung von Wasser entstehen. Ein besonders wichtiges Beispiel dafür sind die Bindemittelverluste, hervorgerufen durch Auslaugung. Begünstigt wird dieser Vorgang oft über die Einwirkung von Kohlensäure aus der Luft. Eine dramatische Beschleunigung erfuhr diese Schadensentwicklung durch die bei Verbrennungsprozessen entstehenden sauren Abgase (Schwefel- und Stickoxide). Insbesondere bei Natursteinen bzw. natursteinähnlichen Kunststeinen hat der Bindemittelverlust dramatische Ausmaße angenommen.Frost damage is one of the direct forms of impact. More significant, however, is the damage caused by the indirect impact of water. A particularly important example of this is the loss of binding agents caused by leaching. This process is often promoted by the impact of carbon dioxide from the air. This development of damage was dramatically accelerated by the acidic exhaust gases (sulphur and nitrogen oxides) produced during combustion processes. The loss of binding agents has reached dramatic proportions, particularly in natural stone and artificial stone similar to natural stone.
Auch die biologische Verwitterung, durch Algen-, Moos- und Pilzbefall, ist nur in Gegenwart von Wasser möglich.Biological weathering, caused by algae, moss and fungi, is only possible in the presence of water.
Zur Verhinderung der beschriebenen Bauschäden muß dem Wasser das Eindringen in die Baumaterialien verwehrt werden. Gleichzeitig soll aber der Wasserdampfaustauch nicht nennenswert herabgesetzt werden.To prevent the structural damage described, water must be prevented from penetrating the building materials. At the same time, however, the water vapor exchange should not be significantly reduced.
Diese Aufgabe läßt sich am besten mit hydrophob! er enden Oberflächenbehandlungsmitteln erfüllen.This task is best accomplished with hydrophobic surface treatment agents.
Praktisch werden dazu die Oberflächen der Baumaterialien, wie Putze, Steine oder Holz, mit den Hydrophobierungsmitteln imprägniert. Da organische Lösemittel aus ökologischen Gründen unerwünscht sind, verwendet man wäßrige Emulsionen bzw. Dispersionen geeigneter Harze.In practice, the surfaces of the building materials, such as plaster, stone or wood, are impregnated with the hydrophobic agents. Since organic solvents are undesirable for ecological reasons, aqueous emulsions or dispersions of suitable resins are used.
Als besonders gut geeignet haben sich lösemittelfreie, wäßrige Alkylalkoxysilan- und / oder Alkylalkoxysiloxan-Emulsionen erwiesen. Solvent-free, aqueous alkylalkoxysilane and/or alkylalkoxysiloxane emulsions have proven to be particularly suitable.
Diese Hydrophobierungsmittel bilden nach Abtrocknen einen offenporigen, wasserabweisenden Film auf den Baumaterialien aus, durch den das Eindringen von Wasser in den Baustoff verhindert wird, ohne die Wasserdampfdurchlässigkeit merklich herabzusetzen. Weitere Anforderungen an ein wirksames Hydrophobierungsmittel sind gute Haftung, eine ausreichende Eindringtiefe sowie Alkali- und UV-Stabilität. After drying, these hydrophobic agents form an open-pored, water-repellent film on the building materials, which prevents water from penetrating the building material without noticeably reducing water vapor permeability. Other requirements for an effective hydrophobic agent are good adhesion, sufficient penetration depth and alkali and UV stability.
Nachteile der wäßrigen Alkylalkoxysilane und Alkylalkoxysiloxane bei der vorbeugenden und sanierenden Baustoffhydrophobierung sind geringe Haftung, ungenügende Eindringtiefe sowie häufig unzureichende Flexibilität der entstehenden Filme. Speziell auf nichtsaugenden oder wenig saugenden Untergründen lassen sich mit wäßrigen Alkylalkoxysilan- bzw.-siloxan-Emulsionen nur unbefriedigende Ergebnisse erzielen. Speziell auf hartgebrannten Ziegeln, Klinkern, Keramikmaterial, Tropenholz, natürlichen Hartsteinen, z. B. Basalt oder Granit, zieht das Hydrophobierungsmittel nur gering ein. Eine Verankerung des Films in den Poren ist damit nicht möglich. Bei der natürlichen Bewitterung schält sich der Film dann bald wieder ab und die Schutzwirkung geht verloren.Disadvantages of aqueous alkylalkoxysilanes and alkylalkoxysiloxanes in the preventive and remedial waterproofing of building materials are low adhesion, insufficient penetration depth and often insufficient flexibility of the resulting films. Only unsatisfactory results can be achieved with aqueous alkylalkoxysilane or siloxane emulsions, especially on non-absorbent or slightly absorbent substrates. The waterproofing agent is only absorbed to a small extent, especially on hard-fired bricks, clinker bricks, ceramic material, tropical wood, natural hard stones, e.g. basalt or granite. Anchoring the film in the pores is therefore not possible. With natural weathering, the film soon peels off again and the protective effect is lost.
Ein weiterer Nachteil der bekannten Hydrophobierungsmittel bei derAnother disadvantage of the known hydrophobic agents in the
· ·9· ·9
Rißüberbrückung und Kapillardesaktivierung besteht darin, daß die sich ausbildenden Filme nicht genügend flexibel sind. Flexibilität
und Rißbeständigkeit der Sperrschichten wären aber erforderlich,
um eine dauerhafte Abdichtung bei Bodensenkungen oder Vibrationen, hervorgerufen durch Straßen- und Luftverkehr, zu gewährleistn.Crack bridging and capillary deactivation is that the films that form are not sufficiently flexible. Flexibility and crack resistance of the barrier layers would be necessary,
to ensure permanent sealing in the event of ground subsidence or vibrations caused by road and air traffic.
In der Patentanmeldung, Az. 195 29 946.9, Eingangsdatum 16.08.1995 (derselbe Anmelder) wird zur Überwindung dieser Schwierigkeiten ein Hydrophobierungsmittel, bestehend aus einer wäßrigen Mischung von Alkylalkoxysiloxanen und wäßrigen Polyacrylat- bzw. Polyacrylat-copolymerisat-Dispersionen, beansprucht.In the patent application, ref. 195 29 946.9, received on August 16, 1995 (same applicant), a hydrophobizing agent consisting of an aqueous mixture of alkylalkoxysiloxanes and aqueous polyacrylate or polyacrylate copolymer dispersions is claimed to overcome these difficulties.
Aufgabe der vorliegenden Erfindung ist es, die an sich bekannten Alkylalkoxysilan- bzw. Alkylalkoxysiloxan-Emulsionen so zu verändern, daß insbesondere die Eindringtiefe erhöht und damit anwendungstechnische Eigenschaften wie Haftungsverhalten und Sprödigkeit der entstehenden Filme entscheidend verbessert werden.The object of the present invention is to modify the known alkylalkoxysilane or alkylalkoxysiloxane emulsions in such a way that, in particular, the penetration depth is increased and thus application properties such as adhesion behavior and brittleness of the resulting films are significantly improved.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß man als Hydrophobierungsmittel wäßrige Alkylalkoxysilan- und / oder Alkylalkoxysiloxan-Emulsionen in Mischungen mit wäßrigen, silan- bzw. siloxanverträglichen Polymerdispersionen verwendet.This object is achieved according to the invention by using aqueous alkylalkoxysilane and/or alkylalkoxysiloxane emulsions in mixtures with aqueous, silane- or siloxane-compatible polymer dispersions as hydrophobizing agents.
Die wäßrigen Polymerdispersionen werden nach einem weiteren Merkmal der vorliegenden Erfindung aus folgenden Kunstharzen ausgewählt: Polyvinylpropionat und -copolymere, Polyvinylacetat und copolymere, Polyvinylidenchlorid und -copolymerisate, Polyacrylsäureester und -copolymerisate, Polymethacrylsäureester und -copolymerisate und Styrol-Butadien-Latices sowie beliebige Mischungen dieser Kunstharzdispersionen.According to a further feature of the present invention, the aqueous polymer dispersions are selected from the following synthetic resins: polyvinyl propionate and copolymers, polyvinyl acetate and copolymers, polyvinylidene chloride and copolymers, polyacrylic acid esters and copolymers, polymethacrylic acid esters and copolymers and styrene-butadiene latices as well as any mixtures of these synthetic resin dispersions.
Nach Anspruch 3 der vorliegenden Anmeldung beträgt der Gehalt derAccording to claim 3 of the present application, the content of the
beanspruchten wirkungsverstärkten Hydrophobierungsmittel 0,5 bis 30 % Alkylalkoxysilan bzw. Alkylalkoxysiloxan (gerechnet reiner Wirkstoff) und 0,2 - 30 % Polymerdispersion (gerechnet reiner Wirkstoff).The claimed enhanced hydrophobic agent contains 0.5 to 30% alkylalkoxysilane or alkylalkoxysiloxane (calculated as pure active ingredient) and 0.2 - 30% polymer dispersion (calculated as pure active ingredient).
Alkylalkoxysiloxane und Alkylalkoxysilane sind oligomere bzw. monomere Siloxane bzw. Silane. Die Restgruppen dieser Verbindungen leiten sich von den Alkanen bzw. vom Benzol ab, d. h. es sind z. B. Methyl-, Ethyl- oder Phenylgruppen.Alkylalkoxysiloxanes and alkylalkoxysilanes are oligomeric or monomeric siloxanes or silanes. The residual groups of these compounds are derived from alkanes or benzene, i.e. they are, for example, methyl, ethyl or phenyl groups.
Die Wirkungsweise der beschriebenen neuartigen Hydrophobierungsmittel, speziell die erhöhte Eindringtiefe, kann folgendermaßen verstanden werden: Bei der kapillaren Aufnahme des Hydrophobierungsmittels, bestehend aus siliciumorganischer Verbindung und Polymerdispersion konkurrieren siliciumorganische Verbindung und Polymer aus der Dispersion um die reaktiven Zentren an den Kapillaroberflächen. Das speziell ausgewählte Polymer wird dabei vorzugsweise gebunden, so daß die siliciumorganischen Verbindungen relativ tiefer in das Baumaterial eindringen können, bis ebenfalls 'Bindung erfolgt.The mode of action of the described new hydrophobic agents, especially the increased penetration depth, can be understood as follows: During the capillary absorption of the hydrophobic agent, consisting of organosilicon compound and polymer dispersion, the organosilicon compound and the polymer from the dispersion compete for the reactive centers on the capillary surfaces. The specially selected polymer is preferentially bound so that the organosilicon compounds can penetrate relatively deeper into the building material until they also bind.
Wäßrige Emulsionen dieser Siloxane bzw. Silane werden schon seit einer Reihe von Jahren für die Hydrophobierung von Baumaterialien eingesetzt. Wichtig für die Stabilität dieser Emulsionen ist der Zusatz spezieller Emulgatoren. Emulsionen dieser Art entsprechen dem Stand der Technik und werden von mehreren Herstellern am Markt angeboten. Sie brauchen deshalb hier nicht mehr näher beschrieben werden.Aqueous emulsions of these siloxanes or silanes have been used for a number of years to make building materials hydrophobic. The addition of special emulsifiers is important for the stability of these emulsions. Emulsions of this type are state of the art and are offered on the market by several manufacturers. They therefore do not need to be described in more detail here.
Wäßrige Kunstharzdispersionen auf Basis Polyvinylpropionat, Polyvinylacetat, Polyvinylidenchlorid, Polyacrylaten und Styrol-Butadienlatices gehören ebenfalls zum Stand der Technik und brauchenAqueous synthetic resin dispersions based on polyvinyl propionate, polyvinyl acetate, polyvinylidene chloride, polyacrylates and styrene-butadiene latices are also state of the art and do not require
hier nicht beschrieben zu werden. Die Kunstharze fallen aufgrund der angewandten Produktionsverfahren als Dispersionen an und können direkt für die beanspruchten wirkungsverstärkten Hydrophobierungsmittel eingesetzt werden.not to be described here. Due to the production processes used, the synthetic resins are produced as dispersions and can be used directly for the claimed enhanced hydrophobic agents.
Die Gewinnung der beanspruchten Hydrophobierungsmittel erfolgt durch einfaches Vermischen der Alkylalkoxysiloxan- bzw. Alkylalkoxysiloxan-Emulsion mit den Kunstharz- bzw. Kunstharzcopolymerisaten im gewünschten Massen- bzw. Volumenverhältnis.The claimed hydrophobic agents are obtained by simply mixing the alkylalkoxysiloxane or alkylalkoxysiloxane emulsion with the synthetic resin or synthetic resin copolymers in the desired mass or volume ratio.
Zur Einstellung der Konsistenz der Hydrophobierungsmittel können anorganische oder organische Verdickungsmittel zugesetzt werden.Inorganic or organic thickeners can be added to adjust the consistency of the hydrophobic agents.
Als Beispiel für ein anorganisches Verdickungsmittel sei die pyrogene Kieselsäure angeführt.An example of an inorganic thickener is fumed silica.
Weichmacherzusätze können die Dehnbarkeit der nach Abtrocknen der Hydrophobierungsmittel entstehenden Filme verbessern. Geeignete Weichmacher sind z. B. Phthalsäureester.Plasticizer additives can improve the elasticity of the films that form after the hydrophobic agents have dried. Suitable plasticizers include phthalic acid esters.
Die erfindungsgemäßen wäßrigen Hydrophobierungsmittel sind gut verträglich mit polaren organischen Lösemitteln, wie Alkoholen und Ketonen; begrenzt verträglich mit Estern und Kohlenwasserstoffen.The aqueous hydrophobic agents according to the invention are well compatible with polar organic solvents such as alcohols and ketones; limited compatibility with esters and hydrocarbons.
Die Einfärbung der beanspruchten wirkungsverstärkten Hydrophobierungsmittel ist mit organischen Farbstoffen oder mit feinteiligen Pigmenten möglich.The colouring of the claimed enhanced hydrophobic agents is possible with organic dyes or with fine-particle pigments.
Um die Rißüberbrückungseigenschaften des beanspruchten Hydrophobierungsmitttels weiter zu verbessern, kann man faserförmige Stoffe zugesetzen.In order to further improve the crack-bridging properties of the hydrophobic agent in question, fibrous substances can be added.
Dafür sind geeignet Glasfasern, natürliche und synthetische Polymerfasern und Carbonfasern.Glass fibers, natural and synthetic polymer fibers and carbon fibers are suitable for this purpose.
Die bei der Behandlung mit den erfindungsgemäßen Hydrophobierungsmitteln entstehenden Filme weisen hohe Eindringtiefen und sehr gute Haftungseigenschaften auf/ auch bei wenig bis nicht saugenden Untergründen. Deshalb eignen sich die beanspruchten, wirkungsverstärkten Hydrophobierungsmittel auch sehr gut zur Abdichtung von hochgebrannten Ziegeln, Tonklinkern, Tropenholz, Platten und Fliesen. Ebensogut lassen sich aber auch saugende Baustoffe, wie z. B. Putze, Gasbeton, Waschbeton oder Estriche, hydrophobieren.The films created when treated with the hydrophobic agents according to the invention have high penetration depths and very good adhesion properties, even on low to non-absorbent surfaces. The claimed, enhanced-effect hydrophobic agents are therefore also very suitable for sealing high-fired bricks, clay bricks, tropical wood, panels and tiles. Absorbent building materials such as plaster, aerated concrete, exposed aggregate concrete or screeds can also be hydrophobicized just as well.
Die entstehenden Filme weisen die nachteiligen Eigenschaften reiner Alkylalkoxysiloxan bzw. Alkylalkoxysilan-Beschichtungen, wie geringe Eindringtiefen, mangelnde Haftung, ungenügende Rißbeständigkeit und geringe Dehnbarkeit, nicht mehr auf. Sie eignen sich deshalb in besonders vorteilhafter Weise zur Hydrophobierung von geschädigten Baumaterialien.The resulting films no longer exhibit the disadvantageous properties of pure alkylalkoxysiloxane or alkylalkoxysilane coatings, such as low penetration depths, poor adhesion, insufficient crack resistance and low elasticity. They are therefore particularly suitable for the hydrophobization of damaged building materials.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29611347U DE29611347U1 (en) | 1996-06-29 | 1996-06-29 | Effect-enhancing water repellent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29611347U DE29611347U1 (en) | 1996-06-29 | 1996-06-29 | Effect-enhancing water repellent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29611347U1 true DE29611347U1 (en) | 1996-09-19 |
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ID=8025821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29611347U Expired - Lifetime DE29611347U1 (en) | 1996-06-29 | 1996-06-29 | Effect-enhancing water repellent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0857772A1 (en) * | 1997-02-06 | 1998-08-12 | Wacker-Chemie GmbH | Joint sealing compounds with high resilience |
| DE102008034825A1 (en) * | 2008-07-23 | 2010-01-28 | Flooring Technologies Ltd. | Process for the production of painted surfaces with a reduced tendency to be soiled on objects, such as wood-based panels |
| DE102009006342A1 (en) * | 2009-01-27 | 2010-07-29 | Hoyer, Manfred | Colored stones, preferably natural stones, lacquered with a water-based lacquer having a ground base made of aqueous dispersion based on acrylates, in which a desired pigmentation is brought, useful for food packaging and children's toys |
| US10829505B2 (en) | 2016-04-20 | 2020-11-10 | Dow Silicones Corporation | Lithium alkylsiliconate composition, coating, and method of making same |
-
1996
- 1996-06-29 DE DE29611347U patent/DE29611347U1/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0857772A1 (en) * | 1997-02-06 | 1998-08-12 | Wacker-Chemie GmbH | Joint sealing compounds with high resilience |
| US6184274B1 (en) | 1997-02-06 | 2001-02-06 | Wacker - Chemie Gmbh | Jointing compounds with improved resilience |
| DE102008034825A1 (en) * | 2008-07-23 | 2010-01-28 | Flooring Technologies Ltd. | Process for the production of painted surfaces with a reduced tendency to be soiled on objects, such as wood-based panels |
| DE102009006342A1 (en) * | 2009-01-27 | 2010-07-29 | Hoyer, Manfred | Colored stones, preferably natural stones, lacquered with a water-based lacquer having a ground base made of aqueous dispersion based on acrylates, in which a desired pigmentation is brought, useful for food packaging and children's toys |
| US10829505B2 (en) | 2016-04-20 | 2020-11-10 | Dow Silicones Corporation | Lithium alkylsiliconate composition, coating, and method of making same |
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