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WO2010105979A1 - Ciment modifié par un polymère - Google Patents

Ciment modifié par un polymère Download PDF

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Publication number
WO2010105979A1
WO2010105979A1 PCT/EP2010/053181 EP2010053181W WO2010105979A1 WO 2010105979 A1 WO2010105979 A1 WO 2010105979A1 EP 2010053181 W EP2010053181 W EP 2010053181W WO 2010105979 A1 WO2010105979 A1 WO 2010105979A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
vinyl
polymer
latent
pozzolanic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2010/053181
Other languages
German (de)
English (en)
Inventor
Steffen Witzleben
Wolfgang Klauck
Hans-Peter Sattler
Norbert Döring
Ulrich Neuhausen
Werner Cordes
Peter Hitz
Mathias Belke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Portlandzementwerk Wittekind Hugo Miebach Sohne KG
Henkel AG and Co KGaA
Original Assignee
Portlandzementwerk Wittekind Hugo Miebach Sohne KG
Henkel AG and Co KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Portlandzementwerk Wittekind Hugo Miebach Sohne KG, Henkel AG and Co KGaA filed Critical Portlandzementwerk Wittekind Hugo Miebach Sohne KG
Priority to DE112010001193T priority Critical patent/DE112010001193A5/de
Publication of WO2010105979A1 publication Critical patent/WO2010105979A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B40/06—Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
    • C04B40/0608—Dry ready-made mixtures, e.g. mortars at which only water or a water solution has to be added before use
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/48—Clinker treatment
    • C04B7/52—Grinding ; After-treatment of ground cement
    • 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
    • C04B2103/52—Grinding aids; Additives added during grinding

Definitions

  • the present invention relates to a process for the preparation of a, in particular dry, polymer-modified hydraulic, latent-hydraulic or pozzolanic-setting construction chemical product.
  • the invention further relates to a product mentioned above, which can be prepared by the process according to the invention, as well as its use in a construction chemical composition.
  • polymer-modified hydraulic, latent-hydraulic or pozzolanic-setting building chemical products are already known from the prior art.
  • cements which are called dispersion or. Redispersionspulver be added.
  • the dispersion or redispersion powders are finely divided polymer particles which form stable dispersions when water is added.
  • These dispersion powders are generally prepared by spray-drying polymer dispersions.
  • the dispersion powders provide in the tile adhesives mentioned above for better processability, in particular an improved application behavior and also provide after curing for a certain flexibility so that can be produced in this way flexible tile adhesive.
  • it is sometimes considered disadvantageous in these dispersion powders that they are available only from a very limited number of different polymers and, moreover, are very expensive due to the complicated production.
  • tile adhesives in the form of 2-component products in which the dry ingredients such as cement, quartz sand, etc. are premixed in a first component and the second component is formed by an aqueous polymer dispersion which is included. The mixing of the tile adhesive is then carried out directly on site by mixing these two components in a predetermined mixing ratio.
  • the object of the present invention is therefore to provide a polymer-modified hydraulic, latent-hydraulic or pozzolanic setting building chemical product, which can be used as a one-component product and is less expensive than the previously known products.
  • the polymer-modified products should be able to be easily incorporated into more complex construction chemical preparations and give the latter superior application properties.
  • a polymer-modified end product is obtained by a process in which a selected vinyl polymer is ground in a predetermined amount together with a hydraulically, latently hydraulic or pozzolanic setting material or its mineral precursor, which is on the one hand much cheaper as a mixture with a dispersion powder, while at the same giving the product excellent processability properties and good post-curing properties, particularly in terms of flexural strength, compressive strength and shrinkage on curing.
  • This method has the further advantage that hydraulically, latently-hydraulically or pozzolanically setting substances as a rule have to be subjected to a grinding process during production or refinement. In this grinding process, the polymer can then be added.
  • DE 200 17 460 U1 discloses a dry mix of curable thick materials containing a polystyrene granules, on the particle surfaces of which at least one hydraulic binder has been adhesively ground.
  • the grinding is intended to prevent the light and voluminous polystyrene granules and the heavier and more compact binder from segregating during storage or further processing. Large volume fractions of polystyrene are milled with small volumes of binder, so that the resulting product must be considered as modified polystyrene.
  • DE 200 17 460 U1 does not disclose that polymer-modified binders which have advantageous properties can be obtained by grinding certain vinyl polymers with a hydraulic, latent-hydraulic or pozzolanic-setting substance or its mineral precursor.
  • a first subject of the present invention is therefore a process for the preparation of a, in particular dry, polymer-modified hydraulic, latent-hydraulic or pozzolanic-setting building chemical product by grinding at least one vinyl polymer together with at least one hydraulic, latent hydraulic or pozzolanic setting substance or its mineral precursor, wherein the total amount of vinyl polymer from 0.6 to 10 wt .-%, based on the total weight of the hydraulic, latent-hydraulic or pozzolanic and the vinyl polymer is selected from the polymers based on vinyl acetate, acrylic acid and their derivatives, styrene, ethylene, vinyl versatate, vinyl laurate, vinyl chloride, or mixtures of these, homopolymers of styrene, as well as polymers that imidized Acrylate units contain, are excluded.
  • Hydraulic, latent-hydraulic or pozzolanic-setting substances are known in the art.
  • a mineral precursor is understood as meaning, for example, the coarse-grained or ballast-like precursor which is converted into the hydraulic, latent-hydraulic or pozzolanic-setting substance by grinding, for example in a ball mill, high-bed roller mill or vertical roller mill.
  • a mineral precursor can be, for example, Portland cement clinker, which is ground in a cement mill with calcium sulfate to cement.
  • the procedure is such that the vinyl polymer is ground together with the hydraulic, latent-hydraulic or pozzolanic-setting substance or its mineral precursor in a mill, for example in a ball mill.
  • the process according to the invention also has the further advantage that a particularly dry, polymer-modified construction chemical product can be prepared in which not only the relatively small selection of polymers to which dispersion powders are obtainable can be used. but in principle all vinyl polymers, since the inventive method is not limited by the fact that can be made of certain vinyl polymers no redispersible powders. For this reason can be produced with very highly customized properties with the inventive method crop products.
  • a dry chemical product is understood as meaning a product which, apart from any water of crystallization and residual moisture possibly contained in the pulverulent constituents, contains no water in liquid form, as is the case, for example, in the above-mentioned two-part method known from the prior art.
  • Component tile adhesives is known in which a component is provided by an aqueous polymer dispersion.
  • a dry product is therefore understood to mean in particular a product which has a residual moisture content of up to 5% by weight of water, preferably of up to 2.5% by weight of water, very particularly preferably up to 1% by weight of water, in each case based on the total weight of the polymer-modified hydraulic, latent-hydraulic or pozzolanic-setting building chemical product.
  • a further advantage of the method according to the invention is that the polymer-modified construction chemical products produced by this process have improved mechanical properties after mixing with water and subsequent curing compared to a product in which the same polymer in the form of a liquid dispersion to the same hydraulic, latent-hydraulic or pozzolanic binder was given. Also in comparison to construction chemical products in which the relatively expensive dispersion powder are used, the polymer-modified construction chemical products according to the invention show very good properties in terms of their processability and final strength.
  • the vinyl polymer (s) is used in an amount of at least 0.6% by weight, based on the total weight of the hydraulic, latent-hydraulic or pozzolanic-setting building chemical product.
  • the total amount of vinyl polymer based on the total weight of the hydraulic, latent-hydraulic or pozzolanic-setting construction chemical product, at least 0.7 wt .-%, preferably at least 1% by weight, particularly preferably at least 2 wt .-% and most preferably at least 2.5 wt .-%.
  • the maximum total amount is preferably 9% by weight, more preferably 8% by weight and most preferably 7% by weight.
  • the vinyl polymer is more preferably used in a total amount, based on the total weight of the hydraulic, latent-hydraulic or pozzolanic-setting construction chemical product, of from 0.7 to 9% by weight, preferably from 1 to 8% by weight, more preferably 2 to 7 wt .-% and most preferably 2.5 to 7 wt .-%, used.
  • polymer contents are particularly preferred because when the vinyl polymers are used in the stated amounts, polymer-modified products can be produced which can be further processed into more complex construction chemical compositions, such as concrete, tile adhesives and the like, which then require no further addition of polymers To achieve flexibility or good processability.
  • the total amount of vinyl polymer is understood to be the sum of the amount of all vinyl polymers in the event that several vinyl polymers are used.
  • the method according to the invention comprises at least the steps:
  • Preferably used as hydraulic, latent-hydraulic or pozzolanic setting material is ground Portland cement clinker (K), ground blastfurnace slag (S), ground fly ash (V, W), ground pozzolana (P, Q), ground burnt slate, ground limestone (L, LL ), Silica fume (D), ground calcium sulfate or mixtures thereof.
  • K ground Portland cement clinker
  • S ground blastfurnace slag
  • V, W ground fly ash
  • P, Q ground pozzolana
  • ground burnt slate ground limestone
  • L, LL ground limestone
  • Silica fume D
  • ground calcium sulfate ground calcium sulfate or mixtures thereof.
  • the names in brackets refer to the definitions according to EN 197-1.
  • Portland cement clinker (K), blastfurnace slag (S), fly ash (V, W), pozzolans (P, Q), burned slate, limestone (L, LL), calcium sulfate is preferably used as the mineral precursor of the hydraulically, latently hydraulic or pozzolanic setting substance used in coarse or granulated form or mixtures of these.
  • Mixtures are understood to mean in each case a mixture of two of the stated components, but also of 3, 4 or more of the stated components, mixtures of the hydraulic, latent-hydraulic or pozzolanic-setting substances with one another, of the mineral precursors with one another, but also mixtures of at least one hydraulically , latent-hydraulic or pozzolanic-setting substance with at least one mineral precursor of a hydraulic, latent-hydraulic or pozzolanic setting material can be used.
  • the vinyl polymers used are selected from the polymers based on vinyl acetate, acrylic acid and derivatives thereof, styrene, ethylene, vinyl versatate, vinyl laurate, vinyl chloride, or mixtures of these, homopolymers of styrene, as well as polymers containing imidated acrylate units, with exception of.
  • Derivatives of acrylic acid are understood as meaning the following compounds: alkali metal and ammonium salts of acrylic acid, methacrylic acid and their alkali metal and ammonium salts, and the C 1 -C 30 -alkyl esters of acrylic and methacrylic acid.
  • Particularly preferred acrylic acid derivatives are methyl methacrylate, ethyl methacrylate and butyl acrylate.
  • the vinyl polymers used are preferably selected from homopolymers of vinyl acetate, of acrylic acid, of methacrylic acid, of C 1 -C 6 -alkyl acrylate and of C 1 -C 8 -alkyl methacrylate, and of copolymers of styrene-acrylate, vinyl acetate-ethylene, vinyl acetate-vinyl versatate, Vinyl acetate-ethylene-vinyl versatate, vinyl acetate-ethylene-methyl methacrylate, vinyl acetate-ethylene-vinyl laurate, vinyl acetate-acrylate-vinyl versatate, vinyl acetate-acrylate-vinyl versatate-ethylene, vinyl chloride-ethylene-vinyl laurate, vinyl chloride-ethylene-acrylate, vinyl chloride-ethylene-vinyl acetate, Butyl acrylate vinyl acetate vinyl versatate, or mixtures of these.
  • the vinyl polymers used are particularly preferably selected from the copolymers styrene-acrylate, vinyl acetate-ethylene, vinyl acetate-vinyl versatate, vinyl acetate-ethylene-vinyl versatate, vinyl acetate-ethylene-methyl methacrylate, vinyl acetate-ethylene-vinyl laurate, vinyl acetate-acrylate-vinyl versatate, vinyl acetate.
  • polymer-modified construction-chemical products in particular dry polymer-modified construction-chemical products, which can contain a very wide selection of polymers or copolymers, can be prepared by the process according to the invention. Therefore, there is no limitation on the construction chemical products of the present invention as in the case of mixtures containing dispersion powders which are available only from a very limited range of polymers. Due to the large number of usable polymers and copolymers building chemical products can be produced with the aid of the method according to the invention, whose properties are very individual to the requirements the purpose of use can be adjusted. This is only possible to a very limited extent with the aid of dispersion powders.
  • the vinyl polymer can be used, for example, in the form of a powder, granules or a dispersion. It is preferably used in the form of an aqueous dispersion.
  • the use of dispersions has the advantage that they can be simply and accurately added during the grinding process.
  • the liquid contained in the dispersions, such as water, evaporates predominantly during the continuous grinding process in the mill, since the mill temperature is typically in the range of 120 to 140 0 C.
  • the use of powders or granules offers the advantage that they are very inexpensive and, moreover, that they do not introduce any further substances which are frequently present in polymer dispersions, for example surfactants.
  • the vinyl polymers can be added to the milling process not only in the form of a dispersion but also, for example, as a solid in the form of powders or granules.
  • the polymer powders or granules soften or melt slightly and are thus distributed over the mineral constituents.
  • a change to the polymers can be made, in particular in relation to the fact that the grinding process can lead to a polymer chain degradation due to the mechanical and thermal effect of the mill. This is more pronounced in particular for longer grinding times and high mill temperatures, such as above 135 0 C.
  • This effect can also be used advantageously to adapt the properties of the construction chemical product obtainable by the process to the requirements.
  • the skilled person can set the desired product parameters based on a few experiments with the milling time and the mill temperature.
  • the mill temperature can be in the range between 80 and 160 0 C.
  • the milling time or average residence time of the mill is typically between 10 and 60 minutes after the addition of the vinyl polymers.
  • a polymer dispersion is used which has a solids content of 20 to 70 wt .-%, preferably 30 to 65 wt .-%, particularly preferably 40 to 60 wt .-%.
  • the vinyl polymer used has a molecular weight of 50,000 to 500,000, in particular 75,000 to 400,000, most preferably 100,000 to 300,000.
  • the molecular weights given are the respective number average M n which, as is familiar to the person skilled in the art, is determined by gel permeation chromatography (GPC).
  • a further subject of the present invention is a polymer-modified hydraulic, latent-hydraulic or pozzolanic-setting product which can be prepared by the process according to the invention.
  • a polymer-modified product is preferably a dry product.
  • a dry product is understood as meaning a product which has a residual moisture content of up to 5% by weight of water, preferably of up to 2.5% by weight of water, very particularly preferably up to 1% by weight of water , in each case based on the total weight of the polymer-modified hydraulic, latent-hydraulic or pozzolanic setting building chemical product.
  • the products which can be produced by the process according to the invention have the advantages over the products known from the prior art that, on the one hand, one-component dry chemical compositions such as tile adhesives and the like can be produced therefrom, in which the user merely has to add water. Furthermore, in the production of concrete or tile adhesive can be dispensed with the use of relatively expensive dispersion powder. Finally, that opens Process according to the invention the preparation of polymer-modified construction chemical products which can be modified by means of polymers which are not obtainable as dispersion powder. In addition, there is a further advantage in that, with the aid of the control of the grinding process, in particular with regard to the duration of the milling process and the mill temperature, the polymer-modified products can be specifically adapted to the requirements of the later intended use.
  • the polymer-modified hydraulic, latent-hydraulic or pozzolanic setting product the vinyl polymer in this product, a minimum film-forming temperature (MFT) in accordance with ISO 2115, DIN 53787 of up to 35 0 C, preferably of up to 20 0 C, particularly preferably up to 10 ° C., very particularly preferably up to 5 ° C.
  • MFT minimum film-forming temperature
  • Another object of the present invention is a hydraulic, latent hydraulic or pozzolanic setting building chemical composition, in particular concrete, such as transport, construction site or ready-mixed concrete, tile adhesives, joint fillers, fillers, sealing slurries, mortar, cement and the like, which is a polymer-modified hydraulic, latent hydraulic or pozzolanic-setting building chemical product which can be prepared by the process according to the invention.
  • concrete such as transport, construction site or ready-mixed concrete, tile adhesives, joint fillers, fillers, sealing slurries, mortar, cement and the like
  • polymer-modified hydraulic, latent hydraulic or pozzolanic-setting building chemical product which can be prepared by the process according to the invention.
  • this additionally contains dispersion powder.
  • Another object of the present invention is the use of a polymer-modified hydraulic, latent-hydraulic or pozzolanic setting building chemical product which can be prepared by the novel process is, in concrete, in particular transport, construction site or ready-mixed concrete, in tile adhesives, joint fillers, fillers, sealing slurries, mortar compounds, cement compounds and the like.
  • Acronal S 400 aqueous anionic copolymer dispersion of an acrylic ester and styrene, polymer content about 57 wt .-%, manufacturer BASF
  • the milling is now carried out at a mean residence time of about 60 minutes and a Matehalaustragstemperatur from the mill of 130 0 C.
  • the product is dry after this grinding time and has a residual moisture content of 0.3 wt .-%.
  • a 6 wt .-% polymer modified cement by metering of Vinnapas EP 64 (aqueous copolymer dispersion of vinyl acetate and ethylene, polymer content about 55 wt .-%, manufacturer Wacker) produced during the grinding process.
  • Vinnapas EP 64 aqueous copolymer dispersion of vinyl acetate and ethylene, polymer content about 55 wt .-%, manufacturer Wacker
  • tile adhesives with the standard tile adhesive formulation according to Table 1 were prepared from these products: Table 1: Composition of dry mortar in g per 1000 g of dry mortar
  • tile adhesive formulations comprising the polymer-modified cement according to the invention clearly surpass a formulation in which the corresponding amount of polymer has been added in the form of a liquid dispersion and a corresponding polymer-free formulation in terms of flexural strength, compressive strength and also in terms of deflection are.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

La présente invention porte sur un procédé de fabrication d'un produit chimique pour le bâtiment, pouvant subir une prise hydraulique, hydraulique latente ou pouzzolanique, modifiée par un polymère, et en particulier sec, par broyage d'au moins un polymère vinylique en même temps qu'au moins une substance à prise hydraulique, hydraulique latente ou pouzzolanique, ou d'un précurseur minéral de cette dernière, la quantité totale du polymère vinylique étant de 0,6 à 10 % en poids par rapport au poids total du produit chimique pour la construction, à prise hydraulique, hydraulique latente ou pouzzolanique, et le polymère vinylique étant choisi parmi les polymères à base d'acétate de vinyle, d'acide acrylique et de ses dérivés, de styrène, d'éthylène, de versatate de vinyle, de laurate de vinyle, de chlorure de vinyle ou de mélanges de ces derniers, à l'exclusion des homopolymères du styrène, ainsi que des polymères qui contiennent des motifs acrylate imidés. L'invention porte en outre sur un produit modifié par polymère, qui peut être fabriqué par le procédé selon l'invention, ainsi que son utilisation dans le béton, les colles pour carrelages, les pâtes pour joints, les produits de rebouchage, les coulis d'étanchéité, les masses pour mortier et les masses pour ciment. L'invention porte en outre aussi sur une composition chimique pour le bâtiment, qui contient les produits chimiques pour le bâtiment pouvant être fabriquée selon l'invention.
PCT/EP2010/053181 2009-03-19 2010-03-12 Ciment modifié par un polymère Ceased WO2010105979A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112010001193T DE112010001193A5 (de) 2009-03-19 2010-03-12 Polymermodifizierter zement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009013478.6 2009-03-19
DE102009013478 2009-03-19

Publications (1)

Publication Number Publication Date
WO2010105979A1 true WO2010105979A1 (fr) 2010-09-23

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PCT/EP2010/053181 Ceased WO2010105979A1 (fr) 2009-03-19 2010-03-12 Ciment modifié par un polymère

Country Status (2)

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DE (1) DE112010001193A5 (fr)
WO (1) WO2010105979A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021064474A1 (fr) * 2019-10-04 2021-04-08 Braskem S.A. Copolymères de polyéthylène ainsi que produits et procédés associés
EP3819273A1 (fr) 2019-11-07 2021-05-12 Martellus GmbH Additif pulvérulent modifié par polymère pour béton et procédé de fabrication d'un béton
US11827815B2 (en) 2021-01-19 2023-11-28 Braskem S.A. Polyethylene copolymer and terpolymer hotmelt adhesive compositions, articles and methods of preparing same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0610699A1 (fr) * 1993-02-01 1994-08-17 Chemie Linz GmbH Copolymères à base de dérivés de l'acide maléique et monomères vinyliques, leur préparation et leur usage
GB2309693A (en) * 1996-02-02 1997-08-06 Sandoz Ltd Cement grinding aid
DE20017460U1 (de) 2000-10-09 2001-01-18 Wiegand, Thomas, 08301 Schlema Trockenmischgut aushärtbarer Dickstoffe
DE69631885T2 (de) 1995-07-24 2005-01-05 W.R. Grace & Co.-Conn. Verbessertes zementzusatzmittelprodukt
DE69915260T2 (de) * 1999-06-15 2005-03-03 Sika Schweiz Ag Mehrzweck-, Polymer-Zementdispergiermittel für Beton mit hoher Fliessfähigkeit und Festigkeit
DE60016610T2 (de) 1999-09-13 2005-12-22 W.R. Grace & Co.-Conn. Verfahren zur verbesserung der mahlung von zementklinker in walzenmühlen
WO2005123621A1 (fr) * 2004-06-21 2005-12-29 Sika Technology Ag Agent de broyage de ciment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0610699A1 (fr) * 1993-02-01 1994-08-17 Chemie Linz GmbH Copolymères à base de dérivés de l'acide maléique et monomères vinyliques, leur préparation et leur usage
DE69631885T2 (de) 1995-07-24 2005-01-05 W.R. Grace & Co.-Conn. Verbessertes zementzusatzmittelprodukt
GB2309693A (en) * 1996-02-02 1997-08-06 Sandoz Ltd Cement grinding aid
DE69915260T2 (de) * 1999-06-15 2005-03-03 Sika Schweiz Ag Mehrzweck-, Polymer-Zementdispergiermittel für Beton mit hoher Fliessfähigkeit und Festigkeit
DE60016610T2 (de) 1999-09-13 2005-12-22 W.R. Grace & Co.-Conn. Verfahren zur verbesserung der mahlung von zementklinker in walzenmühlen
DE20017460U1 (de) 2000-10-09 2001-01-18 Wiegand, Thomas, 08301 Schlema Trockenmischgut aushärtbarer Dickstoffe
WO2005123621A1 (fr) * 2004-06-21 2005-12-29 Sika Technology Ag Agent de broyage de ciment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021064474A1 (fr) * 2019-10-04 2021-04-08 Braskem S.A. Copolymères de polyéthylène ainsi que produits et procédés associés
WO2021064473A1 (fr) * 2019-10-04 2021-04-08 Braskem S.A. Produits et copolymères de polyéthylène et procédés associés
US11326002B2 (en) 2019-10-04 2022-05-10 Braskem S.A. Polyethylene copolymers and products and methods thereof
CN114765981A (zh) * 2019-10-04 2022-07-19 布拉斯科有限公司 聚乙烯共聚物及其产品和方法
CN114787209A (zh) * 2019-10-04 2022-07-22 布拉斯科有限公司 聚乙烯共聚物及其产品和方法
US11453732B2 (en) 2019-10-04 2022-09-27 Braskem S.A. Polyethylene copolymers and products and methods thereof
EP3819273A1 (fr) 2019-11-07 2021-05-12 Martellus GmbH Additif pulvérulent modifié par polymère pour béton et procédé de fabrication d'un béton
WO2021089401A1 (fr) 2019-11-07 2021-05-14 Martellus Gmbh Additif pour béton pulvérulent modifié par polymère et procédé pour la production d'un béton
US11827815B2 (en) 2021-01-19 2023-11-28 Braskem S.A. Polyethylene copolymer and terpolymer hotmelt adhesive compositions, articles and methods of preparing same

Also Published As

Publication number Publication date
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