WO2012019908A1 - Utilisation de poudres polymériques redispersibles dans l'eau pour améliorer la stabilité au stockage de ciments ou mortiers secs cimentaires - Google Patents

Utilisation de poudres polymériques redispersibles dans l'eau pour améliorer la stabilité au stockage de ciments ou mortiers secs cimentaires Download PDF

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Publication number
WO2012019908A1
WO2012019908A1 PCT/EP2011/062840 EP2011062840W WO2012019908A1 WO 2012019908 A1 WO2012019908 A1 WO 2012019908A1 EP 2011062840 W EP2011062840 W EP 2011062840W WO 2012019908 A1 WO2012019908 A1 WO 2012019908A1
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Prior art keywords
cement
vinyl
copolymers
esters
use according
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PCT/EP2011/062840
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German (de)
English (en)
Inventor
Hardy Herold
Thomas Bastelberger
Reinhard HÄRZSCHEL
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Wacker Chemie Ag
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Priority to CN201180039242.6A priority Critical patent/CN103068767B/zh
Publication of WO2012019908A1 publication Critical patent/WO2012019908A1/fr

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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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C04B40/0042—Powdery mixtures
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
    • C04B2103/0057—Polymers chosen for their physico-chemical characteristics added as redispersable powders
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C08K5/541—Silicon-containing compounds containing oxygen
    • C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
    • C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond

Definitions

  • the use of water-redispersible polymer powders to improve the storage stability of cement or cementitious dry mortars relates to the use of water-redispersible polymer powders for improving the storage stability of cement or cementitious dry mortars.
  • cement and cementitious dry mortar In climates with high temperatures and / or high humidities, cement and cementitious dry mortar very often show a significantly reduced storage stability in the container. This manifests itself in the fact that cementitious dry mortars, which are mixed with water after storage, show markedly deteriorated processing properties, that is to say altered, generally significantly increased, viscosity and thus a "tougher"
  • Additive in particular from the group of fatty acids milled.
  • adipic acid or a mixture with adipic acid is added to improve the storage stability of cement.
  • antioxidants is recommended in EP 1260490 A1.
  • the previously known methods for improving the storage stability of cement or cement-containing dry mortar have the disadvantage that often a cover milling of the additives with the cement is required.
  • Another disadvantage is that after modification of dry mortars with appropriate additives there is always a significant delay in the wetting during mixing of the dry mortar with water. It was therefore an object to develop an additive with which a pre-hydration of cement can be effectively prevented and which does not have the abovementioned disadvantages.
  • the invention relates to the use of water-redispersible polymer powders containing
  • one or more film-forming base polymers based on homo- or copolymers of one or more monomers from the group comprising vinyl esters of unbranched or branched alkylcarboxylic acids having 1 to 15 carbon atoms, methacrylic acid esters and acrylic esters of alcohols having 1 to 15 carbon atoms , Vinyl aromatics, olefins, dienes and
  • a ⁇ suitable vinyl esters are those of carboxylic acids having 1 to 15 carbon atoms.
  • Preferred vinyl esters are vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, 1-methylvinyl acetate, vinyl pivalate and vinyl esters of alpha-branched monocarboxylic acids having 9 to 13 carbon atoms, for example VeoVa9 R or VeoVal0 R (trade name of Resolution ).
  • Particularly preferred is vinyl acetate.
  • Suitable methacrylic esters or acrylic esters are esters of unbranched or branched alcohols having 1 to 15 C atoms, such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, norbornyl acrylate. Preference is given to methyl acrylate, methyl methacrylate, n-butyl acrylate and 2-ethylhexyl acrylate.
  • olefins and dienes are ethylene, propylene and 1,3-butadiene.
  • Suitable vinylaromatics are styrene and vinyltoluene.
  • a suitable vinyl halide is vinyl chloride.
  • auxiliary monomers are copolymerized.
  • auxiliary monomers are ethylenically unsaturated mono- and dicarboxylic acids, preferably acrylic acid, methacrylic acid, fumaric acid and maleic acid; ethylenically unsaturated carboxylic acid amides and nitriles, preferably acrylamide and acrylonitrile; Mono- and diesters of fumaric acid and maleic acid such as the diethyl and
  • Diisopropyl esters and also maleic anhydride, ethylenically unsaturated sulfonic acids or salts thereof, preferably vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid.
  • precrosslinking comonomers such as polyethylenically unsaturated comonomers, for example divinyl adipate, diallyl maleate, allyl methacrylate or triallyl cyanurate, or postcrosslinking comonomers, for example acrylamidoglycolic acid (AGA), methylacrylamidoglycolic acid methyl ester (MAGME), N-methylolacrylamide (NMA), N-methylolmethacrylamide ( NMMA), N-methylolallyl carbamate, alkyl ethers such as isobutoxy ether or esters of N-methylolacrylamide, N-methylolmethacrylamide and N-methylolallylcarbamate.
  • epoxide-functional comonomers such as glycidyl methacrylate and glycidyl acrylate.
  • silicon-functional comonomers such as acryloxypropyltri ⁇ alkoxy) and methacryloxypropyltri ⁇ alkoxy ⁇ silanes, vinyltrialkoxysilanes and vinylmethyldialkoxysilanes, alkoxy groups containing, for example, methoxy, ethoxy and ethoxypropylene glycol ether radicals can.
  • methacrylic acid and acrylic acid hydroxyalkyl esters such as hydroxyethyl, hydroxypropyl or hydroxybutyl acrylate or methacrylate
  • compounds such as diacetone acrylamide and acetylacetoxyethyl acrylate or methacrylate.
  • Suitable base polymers a) are vinyl acetate homopolymers, copolymers of vinyl acetate with ethylene, copolymers of vinyl acetate with ethylene and one or more further vinyl esters, copolymers of vinyl acetate with ethylene and (meth) acrylic acid esters, copolymers of vinyl acetate with ethylene and vinyl chloride, styrene Acrylic acid ester copolymers, styrene-1,3-butadiene copolymers, which may optionally also contain the aforementioned auxiliary monomers.
  • Comonomers from the group of vinyl esters having 1 to 15 carbon atoms in the carboxylic acid radical such as vinyl propionate, vinyl laurate, vinyl esters of alpha-branched carboxylic acids having 9 to 13 C ⁇ atoms such as VeoVa9 R , VeoValO R , VeoVall R ;
  • (meth) acrylic acid ester polymers such as copolymers of n-butyl acrylate or 2-ethylhexyl acrylate or copolymers of methyl methacrylate with n-butyl acrylate and / or 2-ethylhexyl acrylate;
  • Styrene-acrylic acid ester copolymers preferably with one or more monomers from the group of methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate; Vinyl acetate-acrylic ester copolymers, preferably with one or more monomers from the group of methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate and optionally ethylene;
  • polymers can still contain the said auxiliary monomers in the stated amounts, and the data in wt .-% add up to each 100 wt .-%.
  • the Monomeraus researchl or the selection of the weight fractions of the comonomers is carried out so that in general a glass transition temperature Tg of -50 ° C to + 50 ° C, preferably -30 ° C to +40 ° C results.
  • the glass transition temperature Tg of the polymers can be determined in a known manner by means of differential scanning calorimetry (DSC).
  • Preferred organosilicon compounds are tetramethoxysilane, tetraethoxysilane, methyltripropoxysilane, methyltri (ethoxyethoxy) silane, vinyltri (methoxyethoxy) silane, (met) acryloxypropyltrimethoxysilane, (meth) acryloxypropyltriethoxysilane, ⁇ "chloropropyltriethoxysilane, ⁇ -nitrilethyltriethoxysilane, ⁇ -Mer- captopropyltrimethoxysilan, ⁇ -mercaptopropyl triethoxysilane, phenyltriethoxysilane, isooctyltriethoxysilane, n-Octyltri- ethoxysilane, hexadecyltriethoxysilane, dipropyldiethoxysilane, methylphenyldiethoxysi
  • linear and branched oligosiloxanes and polysiloxanes and to silicone resins which are obtained by condensation reaction of one or more of the above-mentioned ter low molecular weight silicon compounds, particularly preferably those which are prepared using methylalkoxysilanes, ethylalkoxysilanes, phenylalkoxysilanes, isooctylalkoxysilanes, n-octylalkoxysilanes, hexadecylalkoxysilanes and H-silanes.
  • organoorganoxysilanes are preferred.
  • organosiloxane compounds used according to the invention are commercially available products or can be prepared by conventional methods in silicon chemistry, for example by processes such as those described in Noll, Chemie und Technologie der Silicones, 2nd edition 1968, Weinheim, Germany. and in Houben-Weyl, Methods of Organic Chemistry, Volume E20, Georg Thieme Verlag, Stuttgart (1987) The said silicon compounds may be present alone or as a mixture in the hydrophobizing additive.
  • fatty acids and fatty acid derivatives which under alkaline conditions, preferably pH> 8, release fatty acid or the corresponding fatty acid anion.
  • fatty acid compounds from the group of fatty acids having 8 to 22 carbon atoms, their metal soaps, their amides, and their esters with monohydric alcohols having 1 to 14 carbon atoms, with glycol, with polyglycol, with polyalkylene glycol, with glycerol, with mono-, di- or triethanolamine, with monosaccharides and with polyhydroxy compounds.
  • Suitable fatty acids are branched and unbranched, saturated and unsaturated fatty acids having in each case 8 to 22 C atoms. Examples are lauric acid (n-dodecanoic acid), myristic acid (n-tetradecanoic acid), palmitic acid (n-hexadecanoic acid), Stearic acid (n-octadecanoic acid) and oleic acid (9-dodecenoic acid).
  • Suitable metal soaps are those of the above fatty acids with metals of the 1st to 3rd main group or 2nd subgroup of the PSE, and with ammonium compounds NX /, where X is the same or different and is H, C ⁇ to C 8 alkyl and C x - to C 8 TM hydroxyalkyl. Preference is given to metal soaps with lithium, sodium, potassium, magnesium, calcium, aluminum, zinc, and the ammonium compounds.
  • Suitable fatty acid amides are the fatty acid amides obtainable with mono- or diethanolamine and the abovementioned C e to C 22 fatty acids.
  • Suitable fatty acid ester are the mono-, di- and polyglycidyl kolester the C a - to C 22 - fatty acids.
  • Suitable fatty acid esters are the mono- and diesters of polyglycols and / or polyalkylene glycols having up to 20 oxyalkylene units, such as polyethylene glycol and polypropylene glycol.
  • fatty acid esters of sorbitol and mannitol are also suitable.
  • C x - C 14 alkyl and -Al- kylarylester of lauric acid and of oleic acid mono- and di- glykolester of lauric acid and of oleic acid
  • mono-, di- and tri-fatty acid ester of glycerol with the Lauric acid and oleic acid are also suitable as component b).
  • hydrocarbon waxes such as paraffin waxes and polyalkylene waxes.
  • the compounds b) mentioned can each be used alone or in the form of mixtures.
  • the water-redispersible polymer powder contains 0.1 to 10% by weight, preferably 0.5 to 5% by weight of component b ⁇ , in each case based on the proportion of component a).
  • Suitable protective colloids c) are polyvinyl alcohols; Polyvinyl acetals; Polyvinyl pyrrolidones; Polysaccharides in water-soluble form such as starches (amylose and amylopectin), celluloses and their carboxymethyl, methyl, hydroxyethyl, hydroxypropyl derivatives; Proteins such as casein or caseinate, soy protein, gelatin; lignin; synthetic polymers such as poly (meth) acrylic acid, copolymers of ⁇ meth) acrylates with carboxy-functional comonomer units, poly ⁇ meth) acrylamide, polyvinylsulfonic acids and their water-soluble copolymers; Melamine formaldehyde sulfonates, naphthalene formaldehyde sulfonates, styrene maleic acid and vinyl ether maleic acid copolymers.
  • Examples of these are partially hydrolyzed copolymers of vinyl acetate with hydrophobic comonomers such as isopropenyl acetate, vinyl pivalate, vinyl ethyl hexanoate, vinyl esters of saturated alpha-branched monocarboxylic acids having 5 or 9 to 11 C atoms, dialkyl maleates and dialkyl fumarates such as diisopropyl maleate and diisopropyl fumarate, vinyl chloride, inyl alkyl ethers such as vinyl butyl ether, olefins such as ethylene and decene.
  • hydrophobic comonomers such as isopropenyl acetate, vinyl pivalate, vinyl ethyl hexanoate, vinyl esters of saturated alpha-branched monocarboxylic acids having 5 or 9 to 11 C atoms, dialkyl maleates and dialkyl fumarates such as diisopropyl maleate and diisopropyl fum
  • the proportion of the hydrophobic units is preferably 0.1 to 10 wt .-%, based on the Total weight of partially hydrolyzed polyvinyl alcohol. It is also possible to use mixtures of the stated polyvinyl alcohols. Most preferred are polyvinyl alcohols having a degree of hydrolysis of 85 to 94 mol% and a Höppler viscosity, in 4% aqueous solution of 3 to 15 mPas (Höppler method at 20 ° C, DIN 53015).
  • the said protective colloids are obtainable by methods known to the person skilled in the art and are generally added in an amount of in total from 1 to 20% by weight, based on the total weight of the monomers, in the polymerization.
  • the preparation of the water-redispergxerbaren polymer powder is carried out in a known manner.
  • the film-forming base polymer a) is prepared by emulsion polymerization or by suspension polymerization, preferably by the emulsion polymerization process, the polymerization temperature being generally from 40.degree. C. to 100.degree. C., preferably from 60.degree. C. to 90.degree.
  • the initiation of the polymerization takes place with the water-soluble or monomer-soluble initiators or redox initiator combinations customary for emulsion polymerization or suspension polymerization.
  • the polymerization can be carried out in the presence of one or more protective colloids c), these generally being added in an amount of from 1 to 20% by weight, based on the total weight of the monomers, in the polymerization.
  • protective colloids c these generally being added in an amount of from 1 to 20% by weight, based on the total weight of the monomers, in the polymerization.
  • emulsifiers their amount is 1 to 5 wt .-% based on the amount of monomer.
  • Suitable emulsifiers are anionic, cationic and nonionic emulsifiers and mixtures thereof.
  • Volatile residual monomers can also be removed by means of distillation, preferably under reduced pressure, and optionally by passing or passing inert inert gases, such as air, nitrogen or steam.
  • the aqueous dispersion obtainable therewith Persionen have a solids content of 30 to 75 wt .-%, preferably from 50 to 60 wt .-%.
  • component b) can be mixed with the polymer dispersion in various ways, and then dried. As described in EP 0741759 Bl, the polymerization of the ethylenically unsaturated monomers to the base polymer a) in the presence of component b) can be carried out. It is also possible to emulsify the component b) in the aqueous dispersion of the base polymer a) under high shear, optionally with the addition of further emulsifying aids such as emulsifiers or protective colloids c). Component b) is preferably added in the form of an aqueous emulsion to the aqueous dispersion of the base polymer a).
  • the aqueous dispersions optionally after the addition of further protective colloids c) as Verdüsungshil- fe, dried in a known manner, for example by fluidized bed drying, freeze drying or spray drying.
  • the dispersions are spray-dried.
  • the spray drying is carried out in conventional spray drying systems, wherein the atomization can be done by means of single, two or Mehrstof ⁇ nozzles or with a rotating disk.
  • the exit temperature is generally in the range of 45 ° C to 120 ° C, preferably 60 ° C to 90 ° C, depending on the system, Tg of the resin and the desired degree of drying selected.
  • the proportion of protective colloid c) in the water-redispersible polymer powder is generally from 1 to 30% by weight
  • the powder obtained may be coated with an antiblocking agent, preferably up to 30% by weight, based on the total weight of polymeric constituents.
  • an antiblocking agent preferably up to 30% by weight, based on the total weight of polymeric constituents.
  • antiblocking agents are Ca or Mg carbonate, talc, gypsum, silicic acid, kaolins, metakaolin, calcined kaolin, silicates having particle sizes preferably in the range from 10 nm to 100 ⁇ m.
  • the water-redispersible powder is used to improve the storage stability of cement or dry cementitious mortars.
  • cement are Portland cement, aluminate cement, trass cement, metallurgical cement, magnesia cement, phosphate cement or blastfurnace cement and mixed cements (composite cements).
  • Mixed cements are mixtures of different types of cement or mixtures of cement with substances that lead to an improvement in the cements, such as pozzolans, such as fly ash or silica fume.
  • the water-redispersible powder can also be used to improve the storage stability of cement when it is present as a component of dry mortars.
  • dry mortars also contain additives such as sand, for example quartz sand, dolomite sand, marble sand, and optionally lightweight filler.
  • Examples of other additives in dry mortars are cellulose ethers, thickeners, plasticizers, defoamers, air entrainers, retarders, accelerators and pigments.
  • the water-redispersible polymer powder is mixed with the cement in conventional dry mixing plants or mixed with the constituents of the cementitious dry mortar composition.
  • the proportion of redispergxerbaren polymer powder is 0.05 to 50.0 wt .-%, preferably 0.1 to 20 wt .-%, particularly preferably 0.1 to 5 wt .-%, each based on cement or the cement content in the cementitious dry mortar composition.
  • inventively modified cements or cementitious dry mortar compositions are suitable for use as plasters, for example, basic plasters or decorative plasters, as Building adhesives, for example tile adhesives or adhesives for thermal insulation composite systems, as joint mortar, as self-leveling mortar, and as repair mortar and smoothing mortar (Skim).
  • the amount of added polymer powder can be adjusted with the use according to the invention Pre-hydration effectively prevented.
  • the polymer powders are stronger, the more drastic the storage conditions are in terms of temperature and humidity.
  • Dispersion powder 1 Dispersion powder 1:
  • a dry mortar shows, depending on the proportion of cement and cement, its characteristic heat of hydration (height of the heat flow and time course), such curves show the unaged samples. If the cement is already prehydrated due to extensive aging or improper storage, there is no growth of hydration heat. What Of course, it means that there is no hydration at all, which leads to insufficient strength.
  • Mixture 1 ( Figure 1) occupied on a non-tempered sample (mixture 1) that after storage at 35 ° C / 75% rel. Moisture is no longer hydrated as the cement already chooses) during storage is largely hydrated.
  • FIG. 3 shows, on a sample tempered with the inventive dispersion powder 2 (mixture 3), that even after storage at 35 ° C./75% rel. Moisture is an almost (compared to the un-stored sample) unchanged good hydration, since the cement is protected during aging from aging. Such a sample shows excellent strength after application.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
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Abstract

L'invention concerne l'utilisation de poudres polymériques redispersibles dans l'eau et contenant a) au moins un polymère de base filmogène à base d'homopolymères ou de copolymères d'au moins un monomère issu du groupe comportant des esters vinyliques d'acides alkylcarboxyliques ramifiés ou non ramifiés ayant 1 à 15 atomes de carbone, des esters méthacryliques et des esters acryliques d'alcools ayant 1 à 15 atomes de carbone, des aromates vinyliques, des oléfines, des diènes et des halogénures vinyliques, b) au moins un additif issu du groupe comportant des composés organosiliciés, des acides gras et leurs dérivés d'acides gras, et de la cire d'hydrocarbure, et c) au moins un colloïde protecteur, pour l'amélioration de la stabilité au stockage de ciments ou de mortiers secs cimentaires.
PCT/EP2011/062840 2010-08-13 2011-07-26 Utilisation de poudres polymériques redispersibles dans l'eau pour améliorer la stabilité au stockage de ciments ou mortiers secs cimentaires WO2012019908A1 (fr)

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CN201180039242.6A CN103068767B (zh) 2010-08-13 2011-07-26 可再分散于水中的聚合物粉末在改善水泥或干砂浆的储存稳定性中的用途

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DE102010039315A DE102010039315A1 (de) 2010-08-13 2010-08-13 Verwendung von in Wasser redispergierbaren Polymerpulvern zur Verbesserung der Lagerstabilität von Zement oder zementären Trockenmörteln
DE102010039315.0 2010-08-13

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DE102016202618A1 (de) 2016-02-19 2017-08-24 Wacker Chemie Ag Stabilisatoren zur Verbesserung der Lagerstabilität von Polymerpulver enthaltenden Baustofftrockenformulierungen
WO2022221357A1 (fr) 2021-04-15 2022-10-20 Dow Global Technologies Llc Poudres d'émulsion contenant du silicium destinées à être utilisées dans la fabrication de ciment à base de compositions de mélange sec adhésif pour carrelage

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CN110662724A (zh) 2017-05-31 2020-01-07 Sika技术股份公司 单组分环氧树脂水泥砂浆
CN108751771A (zh) * 2018-05-24 2018-11-06 中交四航工程研究院有限公司 一种混凝土用防水增强型乳胶粉复合粉剂及其制备方法
CN111542506B (zh) * 2018-11-07 2022-05-06 瓦克化学股份公司 可再分散于水中的疏水性聚合物粉末组合物
US20230159394A1 (en) * 2020-04-22 2023-05-25 Wacker Chemie Ag Mixtures containing superabsorbers
WO2021223849A1 (fr) * 2020-05-05 2021-11-11 Wacker Chemie Ag Polymères d'esters de l'acide (méth)acrylique stabilisés par du poly(alcool vinylique)
WO2021239234A1 (fr) * 2020-05-28 2021-12-02 Wacker Chemie Ag Procédé de préparation de poudres polymères redispersibles dans l'eau pour formulations sèches de matériaux de construction
CN115093487B (zh) * 2021-12-30 2023-07-25 江苏超力建材科技有限公司 一种水化热抑制剂及其制备方法

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