KR20130128713A - Aqueous emulsion compositions for scattering of building material surfaces and producing method thereof - Google Patents
Aqueous emulsion compositions for scattering of building material surfaces and producing method thereof Download PDFInfo
- Publication number
- KR20130128713A KR20130128713A KR1020120052636A KR20120052636A KR20130128713A KR 20130128713 A KR20130128713 A KR 20130128713A KR 1020120052636 A KR1020120052636 A KR 1020120052636A KR 20120052636 A KR20120052636 A KR 20120052636A KR 20130128713 A KR20130128713 A KR 20130128713A
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- South Korea
- Prior art keywords
- aqueous emulsion
- alkoxy silane
- concrete
- fumed silica
- weight
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 25
- 239000000839 emulsion Substances 0.000 title claims abstract description 24
- 239000004566 building material Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 11
- -1 alkyl alkoxy silane Chemical compound 0.000 claims abstract description 64
- 229910000077 silane Inorganic materials 0.000 claims abstract description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 239000003995 emulsifying agent Substances 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 125000002091 cationic group Chemical group 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 239000012874 anionic emulsifier Substances 0.000 claims description 2
- 239000000787 lecithin Substances 0.000 claims description 2
- 229940067606 lecithin Drugs 0.000 claims description 2
- 235000010445 lecithin Nutrition 0.000 claims description 2
- 239000012875 nonionic emulsifier Substances 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims 1
- 150000003377 silicon compounds Chemical class 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 46
- 238000010521 absorption reaction Methods 0.000 abstract description 25
- 239000006071 cream Substances 0.000 abstract description 13
- 238000006386 neutralization reaction Methods 0.000 abstract description 10
- 239000013078 crystal Substances 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 2
- 238000003763 carbonization Methods 0.000 abstract 1
- 238000005325 percolation Methods 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 230000035699 permeability Effects 0.000 description 9
- 230000002940 repellent Effects 0.000 description 9
- 239000005871 repellent Substances 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical class OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical class CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 1
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 125000005055 alkyl alkoxy group Chemical group 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- RWHPJDQRXPFAJG-UHFFFAOYSA-N ethoxy(octyl)silane Chemical compound CCCCCCCC[SiH2]OCC RWHPJDQRXPFAJG-UHFFFAOYSA-N 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
-
- 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
- C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
- C04B41/4535—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application applied as a solution, emulsion, dispersion or suspension
-
- 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
- C04B41/4988—Organosilicium-organic copolymers, e.g. olefins with terminal silane groups
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/022—Emulsions, e.g. oil in water
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
- Paints Or Removers (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
Description
The present invention relates to an aqueous emulsion composition for coating the surface of building materials, and more particularly, by making the composition comprising alkyl alkoxy silane and fumed silica in a stable form in the form of a cream, not only has strong water repellency and permeability but also carbonation of concrete. It relates to an aqueous emulsion composition for building surface coating that can suppress the neutralization reaction by.
Absorbent materials such as concrete, when water is absorbed, cause damage due to freezing and neutralization by carbon dioxide. In order to prevent this, water repellent or absorption inhibitor is used to block the concrete surface. In the case of the water repellent, the hydrophobic material, alkyl alkoxy silane and siloxane, which is a hydrophobic material in the capillary, is absorbed into the surface and the capillary and converted into a water repellent material. It prevents the absorption of water and prevents damages such as freezing and neutralization reactions.
However, such a water repellent has a disadvantage of low durability due to a small penetration depth into the surface or concrete. Recently, alkyl alkoxy silane creams have been commercialized to improve the permeability of alkyl alkoxy silanes, but their functions are limited to the formation of thin hydrophobic membranes in capillaries to prevent the ingress of water. The disadvantage of neutralization is that it cannot be prevented.
For example, "Korean Patent Application No. 1996-0017215, Aqueous Emulsion of Alkoxy Alkoxy Silane, Method for Producing It, and Immersion Absorption Agent Containing the Same" suggests emulsification of silane having a silane concentration of 5 to 70 wt%. However, this also can not prevent the damage caused by the neutralization of concrete by carbon dioxide absorbed as a gas.
Alkyl alkoxy silanes are already known as very effective materials for the absorption of materials for construction. In addition, it is known that its durability is also excellent by using impregnation polymerized after infiltration.
However, when the alkyl alkoxy silane is applied to concrete or the like, as shown in FIG. 1, it has a so-called breathing effect in a capillary tube such as concrete, which is effective for enhancing the strength of concrete after application, but after a certain period of time, I / O continues and the neutralization reaction of concrete by carbon dioxide etc. occurs.
As a supplement to the concrete neutralization reaction, a method of applying an alkyl alkoxy silane and then applying an alkali silicate is proposed. In addition, a method of strengthening the surface by impregnating sodium silicate, aluminum silicate, lithium silicate, silica sol, etc. in concrete in a similar manner is presented in "Korean Patent Application No. 2005-0022106, Method for the preparation of surface-reinforced coating solution for concrete". have. However, the method presented here, silica sol reacts quickly and mostly only has a concrete surface reinforcement function by the surface reaction, as actually pointed out in "Korea Industrial Standard No. KS F 4930, Liquid Absorption Agent for Concrete Surface Coating". Likewise, there is a disadvantage that there is no method of predicting durability because it is impossible to check the penetration depth.
Korean Patent Application No. 1996-0017215 discloses a solubilization method using alkyl alkoxy silanes with particle sizes of 0.5-10 μm and concentration of silanes of 5-70% by weight. It has been reported that the concentration of silane in "silicon resin-silane-siloxanes" does not deteriorate the absorption capacity above 40%. However, most of these are absorption inhibitors suggested in “Korea Industrial Standard No. KS F 4930, Liquid-Type Absorption Agent for Concrete Surface Coating”. When applied to inorganic structures such as concrete, they are absorbed by generating water repellency in the capillary by polymerizing reaction after infiltration. It uses the principle of blocking. However, although the ratio of permeability is suggested to be 0.1 or less, it is exceeded in most materials.
In order to solve the problems of the prior art as described above, the present invention uses the excellent properties of the liquid absorption inhibitor of the alkyl alkoxy silane and the principle that the fumed silica crystal growth by reaction with calcium hydroxide in the concrete capillary, By closing the capillary, the aqueous emulsion composition for coating the surface of building materials consisting of alkyl alkoxy silane and fumed silica, which not only functions as an existing absorption prevention and water repellent, but also inhibits neutralization reaction by carbonation of concrete and can be checked to penetration depth. It aims to provide.
It is also an object of the present invention to provide a method for producing the aqueous emulsion composition for applying the building material surface.
An object of the present invention as described above, 40 to 80% by weight of alkyl alkoxy silane having 8 to 12 carbons and trifunctional groups, 1 to 10% by weight of fumed silica having a particle size of 5 to 20 ㎛, emulsifier 0.1 to 3 It is achieved with an aqueous emulsion composition for building surface coating, characterized in that it comprises a weight percent and 2 to 47 weight percent water.
Here, preferably, the carbon of said alkyl alkoxy silane is comprised linearly.
Preferably, the emulsifier is contained 0.3 to 2% by weight.
Preferably, the emulsifier is anionic emulsifier fatty acid salt, alkyl sulfate ether salt, alkylallyl sulfonate and alkyl phosphate ether salt, nonionic emulsifier polyoxyethylene compound, sorbitol compound, sorbitan compound and silicone compound, and cation At least one selected from the group consisting of a quaternary ammonium salt compound and a lecithin compound, which are phosphorus emulsifiers.
In addition, an object of the present invention is achieved by a method for producing an aqueous emulsion composition for building surface coating, characterized in that the aqueous emulsion composition for building surface coating is put in a stirrer and mixed at a speed of 2000 ~ 10,000 rpm.
In the present invention, the alkyl alkoxy silane is present in the mixture of fumed silica and water in the form of a creamy form and can penetrate deeply into building materials such as concrete. As well as the excellent water repellent effect of the alkyl alkoxy silane, the fumed silica is contained in the concrete capillary tube. The crystals grow by reacting with calcium hydroxide in Essence, which prevents the pores of concrete and has a waterproof effect. Therefore, neutralization reaction by carbonation of concrete by carbon dioxide as well as water can be suppressed, and building materials such as concrete can be protected from external environments such as chloride ions and acidic liquids.
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows that the alkyl alkoxy silane mixture made into water solubility and penetrating into the building material, such as concrete, was infiltrated.
FIG. 2 is a view showing that the fumed silica penetrated together with the alkyl alkoxy silane and the alkyl alkoxy silane and the fumed silica mixture prepared by solubilizing the cream to form a growth crystal.
The present invention relates to an aqueous emulsion for building surface coating which forms an absorption prevention layer by applying and impregnating a surface layer for the purpose of protecting the surface of building material. The building material to which the present invention is applied is, for example, concrete, cement mortar, ALC panel, asbestos slate, brick, stone, or the like, but is not limited thereto.
In the present invention, an alkyl alkoxy silane having excellent anti-absorption properties is used, and in the method of using inorganic crystal growth, the fumed silica is crystallized by reaction with calcium hydroxide in the concrete capillary to close the capillary of concrete. By providing a water-based emulsion composition for coating the surface of building materials composed of alkyl alkoxy silane and fumed silica, which not only satisfies both the function of absorption prevention and waterproofing by the conventional method, but also confirms the penetration depth.
Liquid absorbents for coating concrete surfaces using alkyl alkoxy silanes are largely divided into oil and water.
In the case of oily oil, it is usually mixed with solvent having boiling point of 110 ~ 140 ℃ and isopropyl alcohol is used as another solvent. However, in such a case, it is difficult to secure even penetration performance because concrete flows down to a wall or the like.
However, when the alkyl alkoxy silane mixture is prepared in the form of a cream, it is converted into silanol by reacting with moisture in the air as previously known, and then polymerized to give water repellent properties inside the concrete to be absorbed without flowing from the walls. Prevention can be effectively obtained. In addition, it is effective to increase the strength of concrete after application by having a breathing effect (Breathing Effect) by the impregnation that polymerized by deep penetration and polymerized as shown in FIG.
Fumed silica is a reaction of the fumed silica and calcium hydroxide in concrete as shown in Figure 2; Ca (OH) 2 + SiO 2 → CaO · SiO 2 · H 2 O through the path, polymerization and crystallization reaction to seal the capillary in the concrete to prevent absorption and air ingress and entry to obtain both water repellency and waterproof Can be. This is a well-known reaction or until recently, when fumed silica is applied to concrete by high specific surface area, it does not help greatly by increasing the water-cement ratio, but when used as an impregnating material as in the present invention, the fumed silica is very small. It was conceived in the theory that it can be easily moved to concrete capillary.
The present invention provides a method for preparing an emulsion cream of a mixture of fumed silica and alkoxy silane having a particle size of 5 to 20 μm, including alkyl alkoxy silane, water, surfactant and fumed silica. At this time, if the particle size is larger than 20㎛, the cream phase cannot be separated into two layers, and if the fumed silica is not used or less than the proper amount, water resistance does not occur.
If the amount of emulsifier used is large, the water absorption capacity is drastically decreased, so that the effect of the emulsifier is not effective. The amount of emulsifier varies depending on the type of emulsifier, but the amount used should be within 3%. In addition, when the content of the alkyl alkoxy silane is made less than 40% may penetrate poorly in high strength concrete of 30Mpa or more.
As the alkyl alkoxy silane used in the present invention, n-octyl ethoxy silane composed of a trifunctional group generally used as an absorbent of a structure is used. The alkyl alkoxy silane is effective only when the alkyl group has at least 8 carbon atoms. If the carbon number is lower than this, the alkyl alkoxy silane evaporates so fast that the penetration is poor, and the flash point is low, which may cause fire problems and harmful to humans. However, at least 8 carbons should be formed in a straight line, and in the case of more than 15 carbons, there is a disadvantage in that the permeability is low and the price is very high.
In the present invention, the concentration of the alkyl alkoxy silane is composed of about 40 to 80% by weight of the total. In addition, the emulsifier is 3% by weight or less and the amount of fumed silica is 1 ~ 10% by weight, water 2 ~ 47% by weight in a high-speed stirrer of 3,000rpm or more to present a creamy phase having particles of 20㎛ or less.
When the manufactured fumed silica alkyl alkoxy silane cream is applied to a structure of inorganic absorbent material such as concrete, the fumed silica is gradually transferred into the capillary tube of the concrete as an alkyl alkoxy silane carrier while being transparently changed by aggregation. Alkyl alkoxy silane is converted into silicone polymer through dehydration reaction and is changed to water repellency. Fumed silica reacts with calcium hydroxide in concrete to gradually grow crystals in capillary to seal the capillary of concrete. When the stirring speed is low during manufacture, when the viscosity of the cream is low, an emulsion phase is obtained. In this case, a layer separation occurs within a few days or several tens of days, thereby degrading performance. When the present invention is applied to concrete, the degree of penetration is immersed in water by cutting a part of the structure, so that the infiltrated part is not soaked in water and is clearly divided into a water repellent part, and the water repellent layer has an ability to prevent absorption. In addition, the fumed silica can be obtained by the crystal growth in the concrete to be less than 0.1 permeability ratio.
Hereinafter, the present invention will be described in detail with reference to examples, but these examples are only directed to more clearly understand the present invention, and are not intended to limit the scope of the present invention. It will be determined within the scope of the technical spirit of the claims.
[ Example One]
The alkyl alkoxy silane emulsion cream was prepared by rapidly stirring the alkyl alkoxy silane at a weight as shown in Table 1 to 3,000 rpm or more while slowly dropping the alkyl alkoxy silane into two solutions of water, a surfactant, and a fumed silica mixture. At this time, the performance of the prepared emulsion cream in concrete is shown in Table 2.
(weight%)
(weight%)
(weight%)
At this time, sorbitol fatty acid ether was used as an emulsifier of two solutions.
Table 3 shows the performance of penetration depth, permeability ratio, and absorption ratio when the amount of fumed silica in Table 1 was changed according to “Korea Standard No. KS F 4930, Liquid Absorption Agent for Concrete Surface Coating”. The capillary sealing effect is compared with that without fumed silica. When the content of the fumed silica is less than 1%, the permeability ratio does not decrease compared to the absorption ratio, and when the content of the fumed silica is more than 10% by weight, the permeability ratio no longer decreases. At this time, the weight of the alkyl alkoxy silane was reduced as the weight of the fumed silica was changed to 100% by weight. In addition, the fumed silica used has a particle size of 550 nm and preferably 5 to 20 nm.
(%)
(mm)
(%)
(%)
Although not limited to the above, in the present invention, the alkyl alkoxy silane has 8 or more carbons and 15 or less, preferably 8 to 12 alkyl alkoxy silanes, and fumed silica may be produced when the content does not exceed 10% of the total. Do. Preferably it is 1-6 weight%. Emulsifier emulsifiers include nonionic emulsifiers, anionic emulsifiers, cationic emulsifiers and amphoteric emulsifiers. The amount of the emulsion emulsifier should be 3% of the total weight. If it is larger than this, the absorption prevention ability is easily wetted after immersion, so that the absorption prevention performance is poor, and when it is less than 0.1%, cream formation is difficult. Preferably 0.3 to 2% is suitable.
Examples of the emulsifier include, but are not limited to, anionic emulsifiers such as fatty acid salts, alkyl sulfate ether salts, alkylallyl sulfonates, and alkyl phosphate ether salts, and nonionic emulsifiers consisting of polyoxyethylene compounds, sorbitol compounds, sorbitan compounds, and silicone compounds. Include. In addition, cationic emulsifiers include quaternary ammonium salt compounds and lecithin compounds as amphoteric emulsifiers. These emulsifiers can be used individually or in mixture.
Claims (5)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101675981B1 (en) | 2015-07-23 | 2016-11-15 | (주)상봉이엔씨 | manufacture equipment Continuous of Absorbing agent for concrete improvements which silane-based water-repellent |
| KR101980154B1 (en) * | 2018-02-01 | 2019-05-20 | 한국석유공업 주식회사 | Inverted placement waterproof sheet and waterproof method using the same |
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2012
- 2012-05-17 KR KR1020120052636A patent/KR20130128713A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101675981B1 (en) | 2015-07-23 | 2016-11-15 | (주)상봉이엔씨 | manufacture equipment Continuous of Absorbing agent for concrete improvements which silane-based water-repellent |
| KR101980154B1 (en) * | 2018-02-01 | 2019-05-20 | 한국석유공업 주식회사 | Inverted placement waterproof sheet and waterproof method using the same |
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