FR2496090A1 - Waterproofing compsn. for plaster - comprises soln. of silane monomer in water miscible solvent e.g. methanol - Google Patents
Waterproofing compsn. for plaster - comprises soln. of silane monomer in water miscible solvent e.g. methanol Download PDFInfo
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- FR2496090A1 FR2496090A1 FR8026515A FR8026515A FR2496090A1 FR 2496090 A1 FR2496090 A1 FR 2496090A1 FR 8026515 A FR8026515 A FR 8026515A FR 8026515 A FR8026515 A FR 8026515A FR 2496090 A1 FR2496090 A1 FR 2496090A1
- Authority
- FR
- France
- Prior art keywords
- plaster
- water
- silane
- repellent composition
- treated
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000011505 plaster Substances 0.000 title claims abstract description 58
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910000077 silane Inorganic materials 0.000 title claims abstract description 37
- 239000002904 solvent Substances 0.000 title claims abstract description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims description 21
- 238000004078 waterproofing Methods 0.000 title abstract description 4
- 239000000178 monomer Substances 0.000 title abstract description 3
- 230000007062 hydrolysis Effects 0.000 claims abstract description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 3
- 125000000217 alkyl group Chemical group 0.000 claims abstract 2
- 239000005871 repellent Substances 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- 239000002535 acidifier Substances 0.000 claims description 10
- 230000002940 repellent Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 150000002576 ketones Chemical class 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 150000003460 sulfonic acids Chemical class 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 229920002050 silicone resin Polymers 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 150000004756 silanes Chemical class 0.000 description 8
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical class C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 4
- 235000015165 citric acid Nutrition 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000007928 solubilization Effects 0.000 description 2
- 238000005063 solubilization Methods 0.000 description 2
- 239000004971 Cross linker Substances 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010952 in-situ formation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004712 monophosphates Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
Classifications
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- 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
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
-
- 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
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/64—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00112—Mixtures characterised by specific pH values
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
Description
COMPOSITION HYDROFUGE POUR LE TRAITEMENT DU PLATRE OU D'UN
PRODUIT A BASE DE PLATRE ET PROCEDE CORRESPONDANT
On sait qu'il est souvent souhaitable de traiter des matériaux de construction de façon à les rendre hydrofuges.WATERPROOFING COMPOSITION FOR THE TREATMENT OF PLASTER OR A
PLASTER-BASED PRODUCT AND CORRESPONDING METHOD
It is known that it is often desirable to treat building materials so as to make them water repellent.
C'est le cas notamment de parois en plate ou en produits à base de plâtre tels que des agglomérés plâtre-fibres. Un tel traitement peut avoir lieu soit au moment de la confection du plâtre en ajoutant une composition hydrofuge dans l'eau de gachage du platre, soit postérieurement en mettant en contact par pulvérisation ou par imprégnation la paroi que l'on ddsi- -e préserver de l'humidité avec une composition hydrofuge.This is particularly the case for flat walls or in plaster-based products such as plaster-fiber agglomerates. Such a treatment can take place either at the time of making the plaster by adding a water-repellent composition to the plaster mixing water, or subsequently by bringing the wall which is intended to be preserved by spraying or impregnating moisture with a water repellent composition.
Parmi les substances hydrofuges qui ont déjà été utilisées, on peut citer les siliconates de potassium ou de sodium, ces produits ont pour inconvénient, en raison de leur alcalinité, de produire des effluorescences enksurface voire de petits cratères dus à la présence de carbonates solubles. Among the water-repellent substances which have already been used, there may be mentioned potassium or sodium siliconates, these products have the disadvantage, because of their alkalinity, of producing surface effluorescence or even small craters due to the presence of soluble carbonates.
On a aussi essayé des silicones en poudre que l'on mélange au plâtre avant le gâchage ; mais 1ir mise en oeuvre s'avère délicate en raison de la différence de densité des poudres pouvant aller de t à 3 et aussi de la nécessité d'emploi de réticulants ou de catalyseurs en poudre ; on a aussi utilise des émulsions aqueuses de silicone de différente nature que l'on incorpore à l'eau de gâchage du plâtre ; mais, le taux d'hydrofugation pour une consommation raisonnable d'émulsion laisse à désirer et la reprise en eau demeure relativement importante (de l'ordre de 5 à 7 % alors qu elle varie entre 15 et 20 X pour un plâtre non hydrofugé).We have also tried powdered silicones which are mixed with plaster before mixing; but the implementation turns out to be difficult because of the difference in density of the powders which can range from t to 3 and also because of the need to use crosslinkers or powdered catalysts; aqueous emulsions of silicone of different kinds have also been used which are incorporated into the plaster mixing water; however, the rate of water repellency for a reasonable consumption of emulsion leaves something to be desired and the water uptake remains relatively high (of the order of 5 to 7% whereas it varies between 15 and 20 X for a non water repellent plaster) .
On a aussi envisagé tout récemment d'utiliser aes silanes pour l'hydrofugation de matériaux de construction, et plus particulièrement, de matériaux humides. On sait qe ces produits conduisent, après hydrolyse, à la formation in situ d'une résine du type silicone. Plusieurs obstacles s'opposent actuellement à l'utilisation des silanes comme produits hydrofuges. Le premier est d'ordre économique car les silanes content relativement chers et doivent donc être mis en oeuvre d'une façon optimum. Les autres obstacles sont d'ordre technique : en effet, le silane se présente sous forme d'un liquide volatil qui n'est pas soluble ni dispersible dans l'eau et qui, par suite, à tendance à remonter à la surface du matériau à hydrofuger avant d'avoir pu (tre transformé par réticulation en une résine silicone. It has also been envisaged quite recently to use aes silanes for the waterproofing of construction materials, and more particularly, of wet materials. It is known that these products lead, after hydrolysis, to the in situ formation of a silicone-type resin. Several obstacles currently stand in the way of the use of silanes as water repellents. The first is economic since silanes are relatively expensive and must therefore be used in an optimum manner. The other obstacles are of a technical nature: in fact, the silane is in the form of a volatile liquid which is neither soluble nor dispersible in water and which, therefore, tends to rise to the surface of the material. to be water-repellent before being able to be transformed by crosslinking into a silicone resin.
Pour réduire l'évaporation des silanes, on a pensé à accélérer leur polymérisation en les mettant en présence d'un acide fort. Toutefois, leur utilisation en milieu acide fort soulève des difficultés lorsque l'on désire hydrofuger des matériaux de construction en plâtre ou à base de plâtre.En effet. si l'on ajoute dans l'eau de gâchage du plâtre, une solution d'acide chlorhydrique diluée contenant des silanes il se produit une réticulation trop rapide des silanes avec le risque d'une très mauvaise dispersion de la résine @ilico ne formée dans la masse du matériau hydrofugé ou à la surface de ce dernier s'il s'agit dun traitement de surface Au surs plus, il se forme une quantité importante de chlorures solubles ou hygroscopiques et, par conséquent, indésirables à partir des impuretés ou des adjuvants que l'on trouve normalement dans les plâtres industriels. To reduce the evaporation of the silanes, it has been thought to accelerate their polymerization by putting them in the presence of a strong acid. However, their use in a strong acid environment raises difficulties when it is desired to waterproof plaster or plaster-based building materials. if a dilute hydrochloric acid solution containing silanes is added to the mixing water of the plaster, too rapid crosslinking of the silanes occurs, with the risk of very poor dispersion of the @ilico resin formed in the mass of the water-repellent material or on the surface of the latter if it is a surface treatment At most, a significant amount of soluble or hygroscopic chlorides is formed, and therefore undesirable from impurities or adjuvants normally found in industrial plasters.
La présente invention vise à permettre l'utilisation de silanes dans le traitement hydrofuge, en surface ou dans la masse, d'un plâtre ou d'un produit à base de plâtre. Un autre but de l'invention est de réaliser, avee de faibles quantités de silane, une hydrofugation efficace du plâtre ou du produit à base de plâtre, le taux de reprise en humidité de la paroi ainsi traitée étant sensiblement plus réduit que celui que l'on obtient habituellement avec des produits hydrofuges classiques. The present invention aims to allow the use of silanes in the water-repellent treatment, on the surface or in the mass, of a plaster or of a plaster-based product. Another object of the invention is to achieve, with small amounts of silane, an effective water repellency of the plaster or of the plaster-based product, the rate of moisture uptake of the wall thus treated being substantially lower than that 'is usually obtained with conventional water repellents.
Pour atteindre ces buts, on prévoit, selon l'invention de préparer une solution de silane soluble dans l'eau. Or, les silanes ne sont pas en tent que tels solubles, ni dispero subies dans l'eau, même sous une bonne agitation. On met par conséquent en oeuvre un tiers solvant ayant pour rdLe de so- lubiliser le silane dans l'eau Grâce à l'utilisation d'un tiers solvant, il se produit Un bon contact entre le volume d'eau destiné au gâchage ou la quantité d'eau se trouvant à la surface de la parci humide à hydrofuger et la faible quantité de silane.Dans ces conditions, le silane esc parfaite- ment au contact de l'eau ; il n'a plus tendance a remonter en surface et à s ' s'évaporer et l'hydrolyse peut donc se faire rapidement et complètement. TJne autre caractéristique importan-. To achieve these goals, provision is made, according to the invention, to prepare a water-soluble silane solution. However, the silanes are not in tempt as such soluble, nor dispero undergone in water, even under a good agitation. A third solvent is therefore used, the rdLe of which is to dissolve the silane in water. Thanks to the use of a third solvent, good contact occurs between the volume of water intended for mixing or the amount of water found on the surface of the wet area to be waterproofed and the small amount of silane. Under these conditions, the silane escapes perfectly in contact with water; it no longer has a tendency to rise to the surface and to evaporate and the hydrolysis can therefore be carried out quickly and completely. Another important characteristic.
te de l'invention réside dans le choix d'agents d'acidification faiblement acides que l'on met en contact avec la solution de silane soluble dans l'eau dans le but de favoriser l'hydrolyse du silane tout en évitant la formation de sels solubles ou hygroscopiques.te of the invention resides in the choice of weakly acidifying agents which are brought into contact with the water-soluble silane solution in order to promote the hydrolysis of the silane while avoiding the formation of soluble or hygroscopic salts.
La présente invention a donc pour objet une composition hydrofuge pour le traitement dans la masse ou en surface, d'un plfltre ou d'un produit & base de plâtre, caractérisée par le fait qu'elle comporte une solution d'au moins un silane monomère conduisant, après hydrolyse, à la formation d'une résine du type silicone et répondant à la formule générale suivante RXSi-(OR' )" formule dans laquelle R et R' sont indépendamment un aikyl inférieur ayant de 1 à 4 atomes de carbone ou n phényl, x et n sont des nombres entiers dont la somme est égale à 4, x pouvant outre nul dans un solvant dudit silane miscible à l'eau et solubilisant le silane dans l'eau. The subject of the present invention is therefore a water-repellent composition for the treatment in the mass or on the surface of a plaster or a plaster based product, characterized in that it comprises a solution of at least one silane monomer leading, after hydrolysis, to the formation of a silicone-type resin and corresponding to the following general formula RXSi- (OR ') "formula in which R and R' are independently a lower aikyl having from 1 to 4 carbon atoms or n phenyl, x and n are whole numbers the sum of which is equal to 4, x which, in addition, being zero in a solvent for said water-miscible silane and dissolving the silane in water.
Le solvant du silane assurant sa solubilisation dans l'eau est avantageusement pris dans le groupe formé par le m- thanol, l'éthanol, le propanol, l'isopropanol, des cétones telles que l'acétone et le diméthylsulfoxyde. On préfère le méthanol ou l'éthanol. The silane solvent ensuring its solubilization in water is advantageously taken from the group formed by methanol, ethanol, propanol, isopropanol, ketones such as acetone and dimethylsulfoxide. Methanol or ethanol is preferred.
Pour favoriser l'hydrolyse du silane en milieu aqueux et pour assurer simultanément une bonne dispersion, sans prise en masse, de la résine silicone formée, la composition hydrofuge est mise en contact, au moment de l'emploi, avec au moins un agent d'acidification faiblement acide à la fois soluble dans l'eau et dans le solvant du silane et ne conduisant pas, au contact du matériau que l'on désire hydrofuger, à la formation de sels solubles ou hygroscopiques. De préférence, l'agent d'acidification est un sel d'acide minéral pris dans le groupe formé par le mono- ou le disphosphate acide de calcium ou un sulfate acide et/ou un acide organique pris dans le groupe formé par les acides citrique, oxalique, fumarique, tartrique, glycolique et les acides sulfoniques. C'est ainsi que l'on peut utiliser pour l'hydrofugation dans la masse du plâtre, de l'acide oxalique préalablement dissous dans le méthanol servant à la solubilisation du silane, le tout étant ajouté à l'eau de gâchage du plâtre. On peut aussi ajouter à l1 eau de gachage du plâtre, une solution de silane dans du méthanol et un mélange d'acide citrique et d'acide tartrique. To promote the hydrolysis of silane in an aqueous medium and to simultaneously ensure good dispersion, without solidification, of the silicone resin formed, the water-repellent composition is brought into contact, at the time of use, with at least one agent for 'weakly acidic acidification both soluble in water and in the silane solvent and not leading, in contact with the material to be waterproofed, to the formation of soluble or hygroscopic salts. Preferably, the acidifying agent is a mineral acid salt taken from the group formed by calcium acid mono- or disphosphate or an acid sulfate and / or an organic acid taken from the group formed by citric acids. , oxalic, fumaric, tartaric, glycolic and sulfonic acids. Thus it is possible to use for water repellency in the mass of the plaster, oxalic acid previously dissolved in methanol used for the solubilization of the silane, the whole being added to the mixing water of the plaster. It is also possible to add to the mixing water of the plaster, a solution of silane in methanol and a mixture of citric acid and tartaric acid.
La présente invention a également pour objet un procédé pour l'hydrofugation dans la masse ou en surface d'un plâ- tre ou d'un produit à base de plftre, caractérisée par le fait que l'on traite le plâtre ou le produit à base de plâtre par la composition hydrofuge ci-dessus définie renfermant une solution de silane dans un solvant dudit silane, miscible à l'eau et solubilisant le silane dans l'eau. The present invention also relates to a process for water repellency in the mass or on the surface of a plaster or of a plaster-based product, characterized in that the plaster or the product to be treated is treated. plaster base by the water-repellent composition defined above containing a solution of silane in a solvent for said silane, miscible with water and dissolving the silane in water.
L'hydrofugation dans la masse d'un plâtre peut Entre effectuée de deux manières différentes : selon une première possibilité, dans la composition hydrofuge renfermant le silane et son tiers solvant, on dissout un agent d'acidification ci-dessus défini, puis on mélange la composition acidifiée à l'eau de gâchage du piste. The water repellency in the mass of a plaster can Between carried out in two different ways: according to a first possibility, in the water repellent composition containing the silane and its third solvent, an acidification agent defined above is dissolved, then mixed the composition acidified with the track mixing water.
Selon une seconde possibilité, on dissout directement dans l'eau de gâchage du plStre un agent d'acidification cidessus défini puis on y introduit la composition hydrofuge contenant le silane et son tiers solvant. According to a second possibility, an acidification agent defined above is dissolved directly in the mixing water of the plStre and then the water-repellent composition containing the silane and its third solvent is introduced therein.
Dans tous les cas, on ajoute la composition hydrofuge selon l'invention à l'eau de gachage dans une proportion telle que le plâtre obtenu renferme en poids de 0,5 à 15 Z et, de préférence, de 1 à 5 Z de silane. In all cases, the water-repellent composition according to the invention is added to the mixing water in a proportion such that the plaster obtained contains by weight from 0.5 to 15 Z and, preferably, from 1 to 5 Z of silane. .
La quantité d'agent(s) acidifiant(s) qui est ajouté, soit à la composition hydrofuge soit encore à l'eau de gAcha- ge, dépend de plusieurs paramètres notamment de l'agent particulier utilisé. Cependant, d'une façon générale, l'agent d'ad- dification est utilisé dans une proportion telle que le pH dans l'eau de gâchage du plâtre soit compris entre l et 6 et, de préférence, entre environ 2 et environ 4. The amount of acidifying agent (s) which is added, either to the water-repellent composition or even to the mixing water, depends on several parameters, in particular on the particular agent used. However, in general, the addifying agent is used in a proportion such that the pH in the plaster mixing water is between 1 and 6 and preferably between about 2 and about 4 .
Le procédé de l'invention s'applique également à l'hy- drofugation en surface d'une paroi réalisée en pl3tre ou en un produit à base de plâtre. Dans ce cas, sur la paroi à traiter préalablement humidifiée, le cas échéant, par exemple une paroi en plâtre frais ayant fait sa prise mais non encore sèche, on y applique par pulvérisation ou imprégnation, la composition hydrofuge dans laquelle on a préalablement dissout un agent d'acidification ci-dessus défini. The method of the invention also applies to the water-repellency on the surface of a wall made of plaster or of a plaster-based product. In this case, on the wall to be treated previously moistened, if necessary, for example a wall made of fresh plaster which has set but not yet dry, the water-repellent composition in which a solution has previously been dissolved is sprayed or impregnated. acidification agent defined above.
Les trois exemples suivants illustrent la présente invention. The following three examples illustrate the present invention.
Exemple 1 :
Dans 5cm de méthanol à environ 99,5 , on introduit 5cm3 de silane répondant à la formule suivante
Example 1:
In 5 cm of methanol at approximately 99.5, 5 cm 3 of silane are introduced corresponding to the following formula
Le poids moléculaire du silane monomère utilisé est égal à 136 ; il est pur à environ 95 Z et sa densité est égale à 0,94. On agite la solution jusqu'à l'obtention d'une seule phase limpide puis on l'introduit dans 40cm3 d'eau, contenant O,lg d'acide oxalique, pour constituer l'eau de gâchage de lOOg de pîStre. The molecular weight of the monomeric silane used is equal to 136; it is pure at around 95% and its density is equal to 0.94. The solution is stirred until a single clear phase is obtained, then it is introduced into 40 cm 3 of water, containing 0.1 g of oxalic acid, to constitute the mixing water of 100 g of paste.
Le plâtre étant gâché et coulé, on lui laisse faire sa prise, et l'on obtient environ 110g de platre hydrofugé après séchage. The plaster being mixed and poured, it is allowed to set, and about 110 g of waterproof plaster are obtained after drying.
Exemple 2
On introduit 5cm3 de silane répondant à la formule suivante
(poids moléculaire de 78 ; pureté d'environ 95 Z ; densité de : 0,9) dans 5cm3 d'éthanol à environ 95 contenant O,lg d'acide citrique ; on agite la solution jusqu'à l'obtention d'une seule phase homogène puis on l'introduit dans 50cm3 d'eau pour constituer l'eau de gachage de lOOg de plâtre.Example 2
We introduce 5cm3 of silane corresponding to the following formula
(molecular weight of 78; purity of approximately 95%; density of: 0.9) in 5cm3 of ethanol to approximately 95 containing 0.1 g of citric acid; the solution is stirred until a single homogeneous phase is obtained, then it is introduced into 50 cm 3 of water to constitute the mixing water of 100 g of plaster.
Le plStre étant gâché et coulé, on lui laisse faire sa prise et l'on obtient llOg de plâtre hydrofugé dont la reprise en eau n'est pas supérieure à 0,1 Z en poids, après une heure de contact de sa surface avec de l'eau stagnante. The plaster being spoiled and poured, it is allowed to set and one obtains 11Og of waterproof plaster whose water uptake is not more than 0.1% by weight, after one hour of contact with its surface with standing water.
Exemple 3
On introduit 5cm3 de silane répondant à la formule suivante
(poids moléculaire de 148 ; pureté d'environ 95 % ; densité de 0,84) dans 10 cm d'éthanol à environ @5 : on agite la solution jusqu'à l'obtention d'une seule phace homogène puie on l'introduit dans 45 cm3 d'eau coutenant 0,5 g de monophosphate acide de calcium pour constituer l'eau de gâchage de 100 g de plâtre e plâtre étant gâché et coulé, on lui laisse faire sa prise et L'on obtiont I@og de plâtre hydrofugé dont la reprise en eau n'est pas uprieure a 0,1 7 en poids après une heure de contact de sa surface a@ec de l'eau stagnante, et une reprise d'e@u inférieure ou égale à 0,6 g en poids après @heures de contact.Example 3
We introduce 5cm3 of silane corresponding to the following formula
(molecular weight of 148; purity of approximately 95%; density of 0.84) in 10 cm of ethanol at approximately @ 5: the solution is stirred until a single homogeneous phace is obtained then it is introduced into 45 cm3 of water costing 0.5 g of calcium acid monophosphate to constitute the mixing water of 100 g of plaster e plaster being mixed and poured, it is allowed to set and is obtained I @ og of waterproof plaster whose water uptake is not greater than 0.1 7 by weight after one hour of contact of its surface with standing water, and a water uptake less than or equal to 0 , 6 g by weight after contact hours.
@@ est bien entendu que les modes de réalisation ci-dessus décrits ne sont aucunement limitatifs et pourront donner lieu à toutes modifications désimables sans sortir pour cela du cadre de l'invention. @@ it is understood that the embodiments described above are in no way limiting and may give rise to any similar modifications without departing from the scope of the invention.
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8026515A FR2496090A1 (en) | 1980-12-12 | 1980-12-12 | Waterproofing compsn. for plaster - comprises soln. of silane monomer in water miscible solvent e.g. methanol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8026515A FR2496090A1 (en) | 1980-12-12 | 1980-12-12 | Waterproofing compsn. for plaster - comprises soln. of silane monomer in water miscible solvent e.g. methanol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2496090A1 true FR2496090A1 (en) | 1982-06-18 |
Family
ID=9249063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8026515A Pending FR2496090A1 (en) | 1980-12-12 | 1980-12-12 | Waterproofing compsn. for plaster - comprises soln. of silane monomer in water miscible solvent e.g. methanol |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2496090A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0478154A3 (en) * | 1990-08-30 | 1993-04-14 | Atochem North America, Inc. | Method and means for incorporating functionality into an article, and the article so produced |
| EP0738696A1 (en) * | 1995-04-20 | 1996-10-23 | Wacker-Chemie Gmbh | Process for water-repellent impregnation of gypsum |
| EP0761675A3 (en) * | 1995-09-08 | 1998-07-29 | Shin-Etsu Chemical Co., Ltd. | Preparation of water-soluble organic silicon compounds |
| FR2918660A1 (en) * | 2007-07-13 | 2009-01-16 | Edouard Serras | METHOD FOR MANUFACTURING A BUILDING ELEMENT FROM A MIXTURE OF PLASTER, WATER AND A LOAD |
| WO2013053609A1 (en) * | 2011-10-11 | 2013-04-18 | Wacker Chemie Ag | Process for the body-hydrophobization of building materials comprising solid organosilicon compounds |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1364979A (en) * | 1962-09-12 | 1964-06-26 | Dow Corning | Masonry treatment process |
| FR2146474A1 (en) * | 1971-07-22 | 1973-03-02 | Wacker Chemie Gmbh | |
| AT313777B (en) * | 1971-06-15 | 1974-03-11 | Theodor Chvatal | Process for the waterproofing of buildings with alkylalkoxysilanes |
| FR2316398A1 (en) * | 1975-07-02 | 1977-01-28 | Dow Corning Ltd | METHOD AND COMPOSITION FOR THE REALIZATION OF A HUMIDITY-TIGHT BARRIER IN A MASONRY STRUCTURE |
| FR2359804A1 (en) * | 1976-07-28 | 1978-02-24 | Nat Res Dev | PROCESS AND LIQUID MIXTURE FOR THE RESTORATION OF POROUS MINERAL MATERIALS, SUCH AS NATURAL STONE |
-
1980
- 1980-12-12 FR FR8026515A patent/FR2496090A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1364979A (en) * | 1962-09-12 | 1964-06-26 | Dow Corning | Masonry treatment process |
| AT313777B (en) * | 1971-06-15 | 1974-03-11 | Theodor Chvatal | Process for the waterproofing of buildings with alkylalkoxysilanes |
| FR2146474A1 (en) * | 1971-07-22 | 1973-03-02 | Wacker Chemie Gmbh | |
| FR2316398A1 (en) * | 1975-07-02 | 1977-01-28 | Dow Corning Ltd | METHOD AND COMPOSITION FOR THE REALIZATION OF A HUMIDITY-TIGHT BARRIER IN A MASONRY STRUCTURE |
| FR2359804A1 (en) * | 1976-07-28 | 1978-02-24 | Nat Res Dev | PROCESS AND LIQUID MIXTURE FOR THE RESTORATION OF POROUS MINERAL MATERIALS, SUCH AS NATURAL STONE |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0478154A3 (en) * | 1990-08-30 | 1993-04-14 | Atochem North America, Inc. | Method and means for incorporating functionality into an article, and the article so produced |
| EP0738696A1 (en) * | 1995-04-20 | 1996-10-23 | Wacker-Chemie Gmbh | Process for water-repellent impregnation of gypsum |
| EP0761675A3 (en) * | 1995-09-08 | 1998-07-29 | Shin-Etsu Chemical Co., Ltd. | Preparation of water-soluble organic silicon compounds |
| FR2918660A1 (en) * | 2007-07-13 | 2009-01-16 | Edouard Serras | METHOD FOR MANUFACTURING A BUILDING ELEMENT FROM A MIXTURE OF PLASTER, WATER AND A LOAD |
| WO2009027599A3 (en) * | 2007-07-13 | 2009-05-07 | Edouard Serras | Method for making a construction element from a mixture containing gypsum, water and a filler |
| WO2013053609A1 (en) * | 2011-10-11 | 2013-04-18 | Wacker Chemie Ag | Process for the body-hydrophobization of building materials comprising solid organosilicon compounds |
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