Redispersible polymer powder is a water-soluble re-dispersible powder. This powder can be quickly re-dispersed into an emulsion after contact with water. Due to the high bonding capacity and unique properties of redispersible polymer powder, such as water resistance, constructability and thermal insulation, they have a wide range of applications. So how can we identify the quality of redispersible polymer powder?
SLEO Chemical supply professional and honest service.
Film method: take 100g of redispersible polymer powder dissolved in 100ml of water, after 2 minutes of full mixing, stir again, pour the solution on a piece of flat clean glass, glass placed in a ventilated shaded place. After sufficient drying, remove it. Observe the removed polymer film, the higher the transparency, the better the quality. Then pull the film moderately, the better the elasticity, the better the quality. Then cut the film into strips, immersed in water, 1 day later to observe, the less dissolved by water, the better the quality.
Dissolution method: take a certain quality of redispersible polymer powder for full mixing, quietly observed for 5 minutes, in principle, the less insoluble matter precipitated to the bottom layer, the better the quality of redispersible polymer powder, this method is simple and easy to implement.
Ash method, take a certain quality of redispersible polymer powder weighed and placed in a metal container, warmed to about 500 degrees, after 500 degrees of high temperature burning, cooled to room temperature, weighing again. The lighter the weight, the better the quality.
Recommended reading: china redispersible latex powder
The present invention relates to dry mix formulation, this dry mix formulation comprises inorganic water cement, rich aluminium cement and the redispersible polymer powder in water (RDP), and described polymer powder is made by the styrene-butadiene copolymer that comprises hydroxyl.Specifically, the present invention relates to can be used for the composition of mortar preparation, described mortar preparation comprises cement, sand, carboxylation of styrene-divinyl redispersible powders and rich aluminium cement, for ceramic tile tackiness agent (CBTA or the CTA) purposes of cementaceous ceramic tile tackiness agent or cement, waterproof mortar or film and thin mortar.
CTA is conventionally with cement, sand, organic polymer and ether of cellulose preparation.The manufacturer of CTA makes great efforts to be desirable to provide the tackiness agent with following characteristic: it can meet the water soaking shearing resistance of the personnel that the apply speed requirement that at the scene CTA is mixed and use.In the past, apply personnel and add ether of cellulose to control CTA or mortar rheological property, water retention capacity, slip resistance and improved workability in use in CTA mixture.Other way is to use polymkeric substance in CTA application, and for example superplasticizer and polymer powder, to improve workability and the intensity of the cure adhesive of being prepared by described CTA.
Open and wait people at United States Patent (USP) the 7th, 803, a kind of non-weathering cementaceous cement composition is disclosed in No. 225, said composition is not containing active silica material, said composition is the form of dry mortar composition or water-based cement composition, said composition comprises a) normal portland cement of 1-10 % by weight (OPC), b) aluminous cement of 1-30 % by weight, c) calcium sulfate of 1-15 % by weight, d) aqueous polymer dispersions of the polymkeric substance of 0.5-30 % by weight or redispersible in the polymer powder of water, described polymkeric substance is to be made by one or more monomers that are selected from lower group: vinyl ester, (methyl) acrylate, vinyl aromatic compounds, alkene, 1, 3-divinyl and vinyl halides, if necessary, in this polymkeric substance, also comprise can with other monomers of above-mentioned monomer copolymerization, the weight percentage of aqueous polymer dispersions is the solid weight meter based on described dispersion, component is b a)), c) and d) weight percentage is separately that the dry weight based on described cementaceous cement composition is benchmark meter, in described cementaceous cement composition, component a), b), c) and d) content meets following weight ratio: a): b): c): be d) 1-1.5:2-4:1-1.5:2-4.Open and wait people for fear of weathering, need in the process of portland cement hydration, avoid generating calcium hydroxide, or in this process, avoid needing to consume the calcium hydroxide producing.Wait people to wish to avoid using the demand of active silica material or water soluble amino resin, described active silica material or water soluble amino resin can with the calcium hydroxide reaction of any generation, and consumed.Open the high aluminous cement (CAC) that waits people to use relatively large high price, the comparatively cheap normal portland cement (OPC) that is Calucium Silicate powder with main ingredient is compared, the high aluminous cement (CAC) of this kind of high price can not produce calcium hydroxide, or can produce few calcium hydroxide.
The invention solves following problem, a kind of ceramic tile tackiness agent of cement is provided, this tackiness agent has improved water soaking shearing resistance and setting time, improved bond property in waterproof membrane or mortar application, improved flexural strength and compressive strength in thin mortar application, even in the situation that the consumption of normal portland cement also can be realized above-mentioned character higher than the consumption of high aluminous cement, thereby also reduced the cost of preparation.
Summary of the invention
According to the present invention, a kind of dry mixing cement composition, as the ceramic tile tackiness agent of cement (CBTA or CTA), thin mortar, or waterproof membrane or mortar, said composition comprises: the weight of dry-mixing composition of take is benchmark, the normal portland cement of 0-50 % by weight (OPC), the redispersible polymer powder in water (RDP), this polymer powder is prepared by the water-fast film forming styrene butadiene polymkeric substance of carboxylation, the water-fast film forming styrene butadiene polymkeric substance of described carboxylation is preferably low carboxylation degree, the water-fast film forming styrene butadiene polymkeric substance preparation of volume particle size, the average particle size of described polymkeric substance is 150nm-500nm, be preferably 200nm-400nm, 220nm-350nm more preferably, the weight of described water-fast film-forming polymer of take is benchmark, the carboxylation amount of this polymkeric substance is to comprise 0.1-2.75 % by weight, preferred 0.5-2.5 % by weight, more preferably at least one ethylenic unsaturated dicarboxylic acid of 1-2 % by weight, its salt, or its mixture, and high-alumina cement, or rich aluminium cement, for example aluminous cement (CAC) or calcium sulphoaluminate cement (calcium sulfoaluminate, CSA).Described high-alumina cement is aluminous cement for example, and the weight of described high-alumina cement (for example aluminous cement) of take is benchmark, its aluminum oxide (Al 2o 3) content is greater than 30 % by weight, is preferably greater than 40 % by weight, more preferably greater than 55 % by weight, is most preferably at least 70 % by weight.
In the situation that using aluminous cement, for example, the in the situation that of using aluminous cement in cement based ceramic tile tackiness agent dry-mixing composition (CBTA or CTA) or thin mortar dry-mixing composition, the weight of described dry-mixing composition of take is benchmark, described aluminous cement is used with lower consumption, for 0.5-8 % by weight, and take the weight of described dry-mixing composition, be benchmark, the consumption of normal portland cement can at least be three times in the former, or is 25-45 % by weight.For CBTA dry-mixing composition, the consumption of aluminous cement can be 1-8 % by weight, preferred 2.5-5.5 % by weight, and the consumption of normal portland cement can be 25-45 % by weight, preferred 30-40 % by weight, above weight percentage is all that the weight based on described dry-mixing composition is benchmark meter.In CBTA composition, calcium sulfate and aluminous cement together to be used, the weight of aluminous cement of take is benchmark, the consumption of described calcium sulfate is preferably 40-60 % by weight, for example, be 50 % by weight.In thin mortar dry-mixing composition, the consumption of aluminous cement can be 0.5-5 % by weight, preferred 1-3 % by weight, and the consumption of normal portland cement can be 25-35 % by weight, above weight percentage is all that the weight based on described dry-mixing composition is benchmark meter.The weight of aluminous cement of take is benchmark, calcium sulfate can be optionally with following consumption for described thin mortar dry-mixing composition: 40-60 % by weight, for example 50 % by weight.
When using calcium sulphoaluminate cement (CSA), for example, in waterproof mortar dry-mixing composition, the consumption of described calcium sulphoaluminate cement accounts for the 30-50 % by weight of described dry-mixing composition.Described calcium sulphoaluminate cement can (0 % by weight normal portland cement) be used under the condition of not using any normal portland cement, or the gross weight of dry-mixing composition of the present invention of take is benchmark, the consumption of described calcium sulphoaluminate cement can be up to 50 % by weight, preferably 30-50 % by weight.Can without any calcium sulfate of interpolation in the situation that, use described calcium sulphoaluminate cement.
Composition of the present invention comprises styrene butadiene (SB) RDP, user can be obtained have the ceramic tile tackiness agent (CBTA or CTA) of the cement of improved water soaking shearing resistance and setting time, in waterproof membrane or mortar application, obtain improved bond property, in thin mortar application, obtain improved bending and compressive strength; And using other RDP, for example, in the situation of vinyl-acetic ester-ethene (VAE) multipolymer RDP or VAE/ Yi acid Yi Xi Zhi ' tertiary monocarboxylic acid vinyl ester (VA-VeoVA) copolymer mixture RDP, cannot in these character, be significantly improved.The consumption of described polymer powders redispersible can be 0.1-10 % by weight; For CBTA dry-mixing composition, the preferred 1-6 % by weight of its consumption; For thin mortar dry-mixing composition, its consumption is preferably 0.5-4 % by weight; For waterproof mortar dry-mixing composition, its consumption is preferably 1-5 % by weight, and above each weight percentage is all that to take the weight of dry mix formulation be benchmark.
Unless otherwise indicated, otherwise all temperature and pressure units are all room temperature and standard pressure (STP).All scopes of listing herein all comprise end value and can combine.
All terms that comprise bracket represent to comprise the content in bracket and do not comprise arbitrary situation or two kinds of situations of the content in bracket.For example, term " (methyl) vinylbenzene " comprises the situation of vinylbenzene and vinyl toluene.
In this article, unless otherwise indicated, term " molecular weight " represents to use gel permeation chromatography (GPC), in the situation that using poly-(vinylbenzene) standard specimen contrast, and the weight-average molecular weight of the polymkeric substance recording.In this article, term " polymer " " represent the polymkeric substance prepared by one or more different monomers; and such as multipolymer, terpolymer, tetrapolymer, five-membered copolymer etc. can be unregulated polymer, block polymer, graftomer, sequential polymerization thing (sequential polymer) or gradient polymer (gradient polymer) arbitrarily.
In this article, term " mortar viscosity " is expressed as follows described in civilian embodiment, Brookfield (Brookfield) viscosity of the mortar recording under 25 ' and 5rpm condition.
In this article, Tg is (heating rate is 10 '/min, and Tg obtains at the mid point in knee) of using poor formula scanning calorimetry or DSC to record.
In this article, term " % by weight " represents weight percentage.
In this article, unless otherwise indicated, otherwise term " mean particle size " represents granularity or the overall dimension of the particle of the powder particle by determination of laser light scattering in distributing, make the particle of 50 % by weight in distribution less than this particle, in distribution, the particle of 50 % by weight is larger than this particle.For initial latex dispersion particle, use the Nanotrac NPA150 of miniature Zhuo Ke company limited (Microtrac Inc) (Pennsylvania, America, York City (York, PA)), the step of recommending according to manufacturers, by dynamic light scattering measurement mean particle size.The equal granularity of recording body.Particle for redispersion, use Beckman Coulter Inc. (Beckman Coulter) (California, USA, brewer (Brea, California)) the Coulter LS230 particle-size analyzer of producing, the process of recommending according to manufacturer, by laser defusing measure size-grade distribution.Collection is penetrated next scattered light by laser light scattering and polarization intensity scattering from particle, obtains the relation that this scattered light changes with angle, is then converted into size-grade distribution.
In this article, term " solidifies " and represents solidifying of plastic cement thickener.Referring to " concrete-microstructure, character & material (Concrete ?Microstructure, Properties, & Materials), the third edition, the work such as P.Kumar Mehta, the 220th page.What solidify starts to be called initial solidification, indicates the time point that thickener becomes and cannot process.Described thickener can not solidify suddenly; It needs long time to become and is rigidity completely.The completely curing required time is denoted as finally and is solidified.
The inventor finds, by RDP is combined with high-alumina cement, can make the cement composition with following character: this cement composition has beat all good water soaking shearing resistance and the setting time of the ceramic tile tackiness agent (CBTA or CTA) for cement, for example, bond property in waterproof membrane or mortar application (the flexible mortar preparation of rigidity-half), and bending and compressive strength in thin mortar application, described RDP is prepared by the water-fast film forming styrene butadiene polymkeric substance of carboxylation, preferably by the water-fast film forming styrene butadiene polymkeric substance of the volume particle size of low carboxylation degree, prepared, described polymkeric substance comprises at least one ethylenic unsaturated dicarboxylic acid monomer.For example, according to testing standard ANSI118.4 5.2.3 joint (), characterize, result shows, when using specific volume particle size, when SB RDP prepared by the polymkeric substance of low carboxylation degree prepares CTA with a small amount of aluminous cement (comparing with the amount of normal portland cement), the CTA of preparation has beat all good 7 days water soakings do not seep water ceramic mosaic shearing resistance and beat all shorter Vicat setting time thus, the latter records according to testing standard ASTM C191, compare with the mortar with vinyl-acetic ester-ethene (VAE) redispersible polymer powder preparation.In addition, according to testing standard ANSI118.4 5.2.6 joint (), characterize, result shows, CTA of the present invention has the splendid 28 days ceramic mosaic ceramic tiles that do not seep water and freezes/thaw shearing resistance.Therefore, by adopt the water-fast film-forming polymer of volume particle size, low carboxylation degree and the aluminous cement of reduction (with respect to the amount of normal portland cement) simultaneously, can obtain splendid water soaking shearing resistance and freeze/thaw shearing resistance, and cement setting time faster.
Can be the water-fast carboxylation film-forming polymer preferably with low carboxylation degree and large mean particle size for polymkeric substance of the present invention.Preferred water-fast film-forming polymer is styrene-butadiene copolymer.In embodiments of the present invention, described water-fast film-forming polymer can be the volume particle size that comprises monomer styrene, divinyl, methylene-succinic acid and vinyl cyanide, the multipolymer of low carboxylation degree.
Described water-fast film forming copolymer can be prepared by aqueous emulsion polymerization or suspension polymerization in a conventional manner, preferably by letex polymerization, prepare, during preparation, use conventional polymerization temperature, for example 40-120 ', is preferably equal to or higher than 70 ', or preferably up to 105 ', use conventional pressure, for example, when using diene comonomer, pressure is equal to or less than 150psi, is preferably equal to or less than 100psi.Can use water-soluble or oily (monomer) dissolubility initiator (for example tert-butyl peroxide and cumene hydroperoxide) or the redox initiator combination (using the reductive agent of sulphite and hydrosulphite and so on) of one or more routines of convention amount to carry out initiated polymerization.In order to control molecular weight, can be in polymerization process, use in a conventional manner conventional conditioning agent material or the chain-transfer agent of conventional amount used, mercaptan for example, alkanol and two poly alpha methylstyrenes, the monomer that participates in polymerization of take is benchmark, and described conventional amount used is 0.01-5.0 % by weight, or preferably up to 3 % by weight.Described polymerization process is preferably for example, in the situation that exist one or more conventional emulsifiers of convention amount and/or protective colloid (number-average molecular weight is equal to or greater than water solubility copolymer) to carry out.Suitable emulsifying agent comprises anionic emulsifier, cationic emulsifier and nonionic emulsifier, aniorfic surfactant for example, as the alkyl of 8-18 carbon or alkyl aryl ether sulfate, and their salt, and nonionic surface active agent, for example alkyl or alkylaryl polyglycol ether.As the replacement of one or more tensio-active agents or supplement, suitable protective colloid for example can comprise: polyvinyl alcohol; The polysaccharide of water-soluble form, for example starch and Mierocrystalline cellulose; Protein, for example casein or soybean protein; Sulfonated lignin; And synthetic copolymer, for example poly-(methyl) vinylformic acid, and the multipolymer of (methyl) acrylate and carboxyl-functional comonomer unit.
Want more information on Redispersible Polymer Powder? Feel free to contact us.
Can be before polyreaction, in process or to add afterwards one or more of basic cpds, its add-on be corresponding 0.4 mole or more of carboxyl in every mole of multipolymer, preferred 0.5-2 mole, more preferably 0.6 mole or more.Can add described basic cpd with a certain amount of, thereby the pH value of aqueous copolymer product is adjusted to and is equal to or greater than 8.0, or be equal to or greater than 9.5, or preferably at least 10.5, be preferably up to 12.5.Described basic cpd can be inorganic alkaline compound, preferably inorganic strong alkali compound, for example alkali metal hydroxide or alkaline earth metal hydroxides, for example sodium hydroxide or potassium hydroxide.
Described multipolymer can comprise the copolymerization product of following material: 20-79.9 % by weight, be preferably equal to or greater than 30 % by weight, and for example one or more aromatic vinyl comonomers of 60-70 % by weight are a); Be up to 79.9 % by weight, be preferably equal to or less than 60 % by weight, for example 20-33 % by weight one or more 1,3-diene comonomer b); 0.1-2.75 % by weight, is preferably equal to or greater than 0.5 % by weight, or is preferably equal to or less than 2.5 % by weight, or the more preferably comonomer c of 1-2 % by weight); And 0-76 % by weight, be preferably equal to or less than 40 % by weight, or be more preferably equal to or less than 20 % by weight, for example the comonomer d of 3-7 % by weight), it is benchmark that described content be take the gross weight of the monomer that is used for preparing described multipolymer.
Comonomer and part by weight thereof are selected, thereby make the second-order transition temperature (Tg) of the multipolymer that makes be equal to or higher than-20 ', preferably be equal to or higher than 0 ', or be more preferably equal to or higher than 10 ', or be equal to or less than 30 ', preferably be equal to or less than 28 ', or be more preferably equal to or less than 25 '.If for the application in cement composition, Tg is too high, final character of use is understood variation, and described final character of use comprises for example flexible (particularly under chilling temperatures) and crackle bridge joint.Can, by poor formula scanning calorimetry (DSC), measure in known manner the Tg of multipolymer.It is used as sacrifice binding agent in pottery processing, and the Tg of available SB RDP can, up to 110 ', be preferably 60 '.
Suitable comonomer a) comprises for example vinylbenzene, alpha-methyl styrene, C 1-C 4alkyl-vinylbenzene, for example adjacent Vinyl toluene and t-butyl styrene, and (methyl) vinylformic acid C 1-C 8alkyl ester and (methyl) vinylformic acid cycloalkyl ester.Vinylbenzene preferably.In styrene-butadiene copolymer, suitable comonomer b) comprise for example 1,3-butadiene and isoprene, preferably 1,3-butadiene.Suitable comonomer c) comprise for example ethylenic unsaturated dicarboxylic acid, salt, particularly methylene-succinic acid and/or toxilic acid and/or the fumaric acid of their acid anhydrides and they, thus improve the dispersiveness of redispersible copolymer powder.
Suitable optional comonomer d) for example comprise (methyl) acrylic acid alkyl ester, ethyl propenoate for example, methyl methacrylate, n-butyl acrylate, or (methyl) ethyl acrylate, ethylenic unsaturated amides and nitrile, for example (methyl) vinyl cyanide; The diester of fumaric acid or toxilic acid; (methyl) acrylic acid hydroxy alkyl ester; The acid mono of sulfur-bearing, for example Sodium styrene sulfonate; Phosphorous acid mono, for example (methyl) vinylformic acid phospho alkyl ester (phosphoalkyl (meth) acrylate) and cross-linking comonomer, for example Vinylstyrene or vinyl hexanediacetate; Rear cross-linking comonomer, acrylamide oxyacetic acid (AGA) for example, methacryloyl cholamine acid methyl esters (MAGME), N-methylol-(methyl) acrylamide (NMA) and alkyl ester thereof; Allyl methacrylate(AMA) or N-methylol allyl carbamate; Epoxy functionalized comonomer, for example (methyl) glycidyl acrylate; And functionalized silicon comonomer, for example comprise the organoalkoxysilane of (methyl) acrylate or vinyl monomer.
Preferably, in order to increase redispersible in the performance of water by the dry powder making, can, before described aqueous copolymer dispersion substantially dry, add basic cpd mentioned above.
Preferably, for realize good can water-redispersible can and good smell control, account for carboxyl sum 75% or more in multipolymer, preferably 85% or more, more preferably 95% or more carboxyl can be positioned at the surface of copolymer powder particle.In these multipolymers, the surperficial carboxyl of part or all can be present in copolymer powder with their form of salt.The molar weight sum that is arranged in the molar weight of carboxyl on copolymer pellet surface and the carboxyl of the liquid phase of aqueous dispersion can be by known volumetry independent measurement.By the molar weight of mensuration of carboxyl that is arranged in the carboxyl on copolymer pellet surface and is arranged in aqueous dispersion liquid phase divided by the carboxyl total amount of copolymer pellet aqueous dispersion, described carboxyl total amount refers to for preparing the comonomer c of multipolymer) amount (total monomer weight that is used for preparing multipolymer of take is benchmark), be used for calculating the per-cent of the carboxyl that is positioned at copolymer powder surface.Can prepare in the following manner multipolymer, for example, use separately ethylenic unsaturated dicarboxylic acid as comonomer c); In copolyreaction process, carry out sectional type monomer addition, thereby comprise more acid in the part a little later of copolyreaction; And/or be 3-9, preferred 4-8 or preferably carry out polyreaction under the condition of 6-8 at pH.
Preferably, in order to realize good water soaking shearing resistance and to freeze/thaw shearing resistance, carboxylation amount is 0.1-2.75 % by weight, preferred 0.5-2.5 % by weight, more preferably at least one ethylenic unsaturated dicarboxylic acid, its salt or its mixture of 1-2 % by weight (preferably methylene-succinic acid and/or toxilic acid and/or fumaric acid), described amount is that to take the weight (styrene-butadiene copolymer that for example comprises methylene-succinic acid) of comonomer gross weight or described water-fast film-forming polymer be benchmark.According to the present invention, by adopt specific polymer particle size and total carboxylation level and high-alumina cement simultaneously, can remarkably influenced water soaking shearing resistance and freeze/thaw shearing resistance.
According to the present invention, the granularity of described water-fast film-forming polymer is also very important for realizing given shearing resistance.The mean particle size for the treatment of the water-fast film-forming polymer in spray-dired aqueous dispersion or latex is preferably 150-500 nanometer, and more preferably 200-400 nanometer, most preferably is 220-350 nanometer.The solids content of the aqueous dispersion obtaining in the present invention or latex (being often referred to stabilising dispersions or the emulsion of polymer particles in aqueous medium) is generally 30-75 % by weight, and for example 35 % by weight-65 % by weight, are preferably 40 ' 60 % by weight.
The common drying composite that the redispersible polymer powder in water of the present invention comprises water-insoluble film-forming polymer and deflocculant, described deflocculant is used for realizing colloidal stability and makes polymer powder redispersion become submicron particle size.By adopting the water-fast film-forming polymer of low carboxylation degree, large mean particle size, even if there is higher colloid-stabilised agent content and highly filled in the situation that, also can be provided for spray-dired low viscosity in carrying out spray-dired dispersion.The example of suitable deflocculant comprises for example polyvinyl alcohol.Be preferred for the polyvinyl alcohol that polyvinyl alcohol of the present invention is partial hydrolysis.In some embodiments of the present invention, the weight of described water-fast polymkeric substance of take is benchmark, the content that described PVOH or other known being used for realize the deflocculant of colloidal stability can be at least 1 % by weight, for example 2-30 % by weight, preferably 5-20 % by weight.
The described redispersible polymer powder in water can be prepared in the following manner: the aqueous mixture to water-fast film-forming polymer and deflocculant is dried, described redispersible in the polymer powder of water to make.Preferably, the aqueous dispersion of described water-fast film-forming polymer is mixed with deflocculant, make the aqueous dispersion of basic homogeneous, then this aqueous dispersion is sprayed dry, make described redispersible in the polymer powder of water.In one embodiment, can regulate the viscosity for the treatment of spray-dired charging by solids content, make viscosity number be less than mPas (turning and the brookfield viscosity (Brookfield viscosity) of 23 ' 20), preferably be less than 250mPas.The gross weight of dispersion of take is benchmark, treats that the solids content of spray-dired dispersion is generally 25 % by weight-60 % by weight, is preferably 35 % by weight-50 % by weight.In order preparing, redispersiblely in the polymer powder of water, aqueous dispersion to be dried, preferably by spraying, to be dried.Spraying is dry can be carried out in conventional spray drying device, and this equipment can carry out atomization by single fluid, two-fluid or many fluid tips or rotating disc type spraying gun.Conventionally, air, nitrogen or nitrogen-rich air can be used as dry gas, and the inlet temperature of dry gas is no more than 200 ' conventionally, is preferably 110-180 ', more preferably 140-170 '.Conventionally temperature out is set in to 45 '-120 ', preferably in the scope of 60 '-90 ', specifically depends on the Tg of equipment, resin and required degree of drying.
Except deflocculant, can before being dried, aqueous dispersion add the optional additive of routine of convention amount, and the weight of polymer powders redispersible particle of for example take is benchmark, adds the defoamer that is up to 1.5 % by weight.Other additive that can use convention amount, comprises one or more salt, for example CaCl 2and MgCl 2, emulsifying agent or tensio-active agent, monose, disaccharides and anti-caking agent (ACA) or antiblocking agent, for example kaolin, or dispersion agent or superplasticizer.Take powder total amount as benchmark, and the amount of anti-caking agent (ACA) can be up to 30 % by weight, is preferably 3-15 % by weight.
The X50 granularity of the size-grade distribution of polymer powders redispersible depends on drying conditions and drying plant.X50 represents to take the median particle that micron is unit, and the particle of 50 % by weight is less than this granularity.The X50 granularity of polymer powders redispersible of the present invention is preferably 5-300 micron, and more preferably 20-200 micron, most preferably is 50-100 micron.Can use particle-size analyzer " Sympatec Helos ", utilize laser diffraction, under the useful range of 350 microns of 1.8 ' and the condition by pressurized air dispersed powders, measure the size-grade distribution of powder.
The weight of the polymer beads in described polymer powders redispersible, for example in powder, the weight of the carboxylation multipolymer of aromatic vinyl comonomer as herein described and 1.3-diene comonomer can be preferably 40-95 % by weight, more preferably 65-87 % by weight, the gross weight of the described redispersible polymer powder in water of take is benchmark.
In this article, term " polymer powders redispersible " represents to have the powder of following character: this kind of powder can be dispersed in deionized water at an easy rate, provides for preparing the size-grade distribution of the latex of described polymer powders redispersible or the initial particle size of emulsion polymer.
According to the present invention, the example of cement or hydraulic binder for example comprises: the normal portland cement that can buy on market of one or more routines; And one or more routines, the high-alumina cement that can buy on market, the aluminous cement that for example can buy on market (CAC), French Ke Nuosi SA (the Kerneos SA of company for example, France) the Ternal W producing, this is the CAC that a kind of alumina content is about 70 % by weight, and calcium sulphoaluminate cement (CSA), the calcium sulphoaluminate cement that for example the Tangshan polar bear cement company of BeiJing, China (Tangshan Polar Bear Cement Company, Ltd) is produced.
Preferably calcium sulfate and aluminous cement are together used, the weight of aluminous cement of take is benchmark, and the consumption of described calcium sulfate is preferably 40-60 % by weight, for example, be 50 % by weight.The source of suitable calcium sulfate or form comprise gypsum or dehydrated gyp-, solidify form (semihydrate), and dried forms (dihydrate), and the mixture of these materials.
According to the present invention, the dry-mixing composition of described cement can also comprise filler.The example of filler comprises for example sand, as silica sand and quartz sand, and silica powder, calcium carbonate, rhombspar, pure aluminium silicate, talcum or mica, or light filler, for example float stone, foamed glass, gas concrete, perlite or vermiculite.Also can comprise the mixture of described filler.
The dry-mixing composition of described cement can comprise other conventional additives of convention amount, for example, be selected from alkali metal hydroxide and/or the alkaline earth metal hydroxides of zinc oxide, zinc hydroxide and zinc subcarbonate; Promotor, Quilonum Retard for example, tartrate; One or more thickening materials, ether of cellulose for example, as Walocel MT 20.000PV; Defoamer; Liquefying agent; Dispersion agent; Or superplasticizer, water solubility copolymer dispersion agent for example, as MELFLUXF, this is the multi-carboxylate of the BASF building Polymer Company (BASF Construction Polymers, Kennesaw GA) in Kenny's rope city of the State of Georgia, US modification of producing.
Cement based ceramic tile tackiness agent of the present invention comprises 25-45 % by weight conventionally, and preferably the normal portland cement of 30-40 % by weight is as hydraulic binder; The quartz sand that comprises 40-70 % by weight is as main filler, and the granularity of this quartz sand is preferably 0.1-0.5 millimeter; Comprise 1-8 % by weight, preferably the aluminous cement of 2.5-5.5 % by weight; And comprise 0.1-10 % by weight, and the preferred polymer powders redispersible of the present invention of 1-6 % by weight, it is benchmark that described weight percentage be take the gross weight of described cement based ceramic tile tackiness agent dry-mixing composition; The calcium sulfate that also comprises 40-60 % by weight, it is benchmark that this content be take the weight of described aluminous cement.Other optional component comprises: (dry weight of ceramic tile tackiness agent of take is benchmark to one or more ether of cellulose, preferably total amount is 0.05-1 % by weight, more preferably 0.2-0.5 % by weight), for controlling rheological, water-retentivity, the workability of anti-skid and improvement; Granularity is quartz or the limestone powder of 30-60 micron, as the tiny filler that helps, improves denseness and workability; With Mierocrystalline cellulose or mineral fibre, for improving anti-skid.Aluminum oxide (the Al that is used for the aluminous cement of described CBTA composition 2o 3) content can be greater than 30 % by weight, is preferably greater than 40 % by weight, more preferably greater than 55 % by weight, is most preferably at least 70 % by weight, it is benchmark that described content be take the weight of described aluminous cement.
The normal portland cement that the thin mortar dry-mixing composition of cementaceous of the present invention can comprise 25-35 % by weight is conventionally as hydraulic binder; The calcium carbonate that comprises 60-70 % by weight is as main filler, and described calcium carbonate can be the Omyacarb130GU that for example Switzerland Ao meter Ya company (Omya, Switzerland) produces; The aluminous cement that comprises 0.5-5 % by weight; And comprise 0.1-10 % by weight, and the preferred polymer powders redispersible of the present invention of 0.5-4 % by weight, it is benchmark that described weight percentage be take the gross weight of described thin mortar dry-mixing composition.Aluminum oxide (the Al that is used for the aluminous cement of described thin mortar material 2o 3) content can be greater than 30 % by weight, is preferably greater than 40 % by weight, more preferably greater than 55 % by weight, is most preferably at least 70 % by weight, it is benchmark that described content be take the weight of described aluminous cement.
Waterproof membrane of the present invention or waterproof mortar dry-mixing composition (for example flexible mortar preparation of rigidity-half) can comprise 0-50 % by weight conventionally, and for example the normal portland cement of 30-50 % by weight is as hydraulic binder; The quartz sand that comprises 30-70 % by weight is as main filler; The calcium sulphoaluminate cement that comprises 30-50 % by weight; And comprise 0.1-10 % by weight, and the preferred polymer powders redispersible of the present invention of 1-5 % by weight, it is benchmark that described weight percentage be take the weight percentage of described waterproof membrane or waterproof mortar dry-mixing composition.Described calcium sulphoaluminate cement can be alumina content (Al 2o 3) be greater than the mixture of CSA linking agent, gypsum or the dehydrated gyp-of 30 % by weight and filler (Wingdale for example adding).Can under the condition without blending normal portland cement, use calcium sulphoaluminate cement.
In another aspect of the present invention, the method of sealing, bonding or coated substrate comprises: (1) provides the dry-mixing composition of cement, said composition comprises polymer powders redispersible of the present invention, (2) said composition is mixed with water, and (3) put on base material dry.Described composition is preferred for building industry product used, can be within following object, or for the preparation of following object: skim coat, crackle barrier film, sealing slurries or mending mortar, and Self-leveling floor compound S LFC.The example of suitable base material for example comprises: ceramic tile, glued board, backing plate, heat-insulating panel, inner wall surface, iron and steel strengthening material, aging concrete, the concrete of sclerosis, aging mortar, mortar or the sound insulation panel of sclerosis.Can be by adding to being dry mixed the denseness that water regulates cement composition in powder.Can add according to the requirement of end-use the water of specified quantitative, to obtain required denseness.Contriver shockingly finds by cement composition of the present invention is put on to base material, can obtain improved water soaking shearing resistance and freeze/thaw shearing resistance.
Following examples are only used for illustrating the present invention, but do not limit the scope of the present invention that claims limit.Unless otherwise indicated, all by weight, all temperature are all room temperatures for all umbers and percentage ratio, and all pressure is all standard pressure.
For more Methyl Hydroxyethyl Celluloseinformation, please contact us. We will provide professional answers.