EP2655288A1 - Ciment de magnésium - Google Patents

Ciment de magnésium

Info

Publication number
EP2655288A1
EP2655288A1 EP11799100.0A EP11799100A EP2655288A1 EP 2655288 A1 EP2655288 A1 EP 2655288A1 EP 11799100 A EP11799100 A EP 11799100A EP 2655288 A1 EP2655288 A1 EP 2655288A1
Authority
EP
European Patent Office
Prior art keywords
magnesium
group
linear polymer
independently
polymer backbone
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.)
Withdrawn
Application number
EP11799100.0A
Other languages
German (de)
English (en)
Inventor
Dieter Honert
Oliver Blask
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.)
Sika Technology AG
Original Assignee
Sika Technology AG
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 Sika Technology AG filed Critical Sika Technology AG
Priority to EP11799100.0A priority Critical patent/EP2655288A1/fr
Publication of EP2655288A1 publication Critical patent/EP2655288A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • C04B28/30—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 magnesium cements or similar cements
    • 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
    • C04B28/10—Lime cements or magnesium oxide cements
    • C04B28/105—Magnesium oxide or magnesium carbonate cements
    • 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
    • C04B28/30—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 magnesium cements or similar cements
    • C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the invention relates to magnesium cements containing comb polymers.
  • the invention also relates to the preparation of such cements and their use as well as molded articles made from the cements.
  • Magnesium cements contain magnesium compounds which act as binders. Magnesium cements are used in construction chemicals for a variety of applications. A particular field of application is the production of building boards, for example wood wool boards or chipboards. In the production of such plates suitable fillers are incorporated into the magnesium cement.
  • Magnesium cements usually contain magnesium oxide in combination with a magnesium salt, in particular magnesium chloride or magnesium sulfate. After shaping and setting, optionally followed by drying or sintering, hard solid products are formed, whereby the product properties can be improved by admixing suitable fillers.
  • Magnesium cements are hardened with water. There is a need to reduce the water content so that the product becomes less porous and more stable. At low water content, a shorter curing or drying process is sufficient.
  • Magnesium cements and their use for the production of molded articles, in particular of wood wool lightweight panels, become for example DE 29 32 332 A1, DE 25 32 581 A1, DE 29 03 177 A1 and DE 10 07 685 described.
  • the invention is based on the problem of providing a simplified and improved process for the production of magnesium cements. According to the invention, improved magnesium cements and products which can be produced therefrom are also to be made available.
  • the invention is based on the problem to reduce the water content of magnesium cements and to achieve a liquefaction.
  • the processing properties and the product properties of the cured moldings are to be changed only slightly adversely.
  • the components should have a high density and a good strength, in particular with regard to the tensile strength and breaking strength.
  • the method should allow rapid processing of magnesium cements.
  • the process should be particularly suitable for the production of wood wool lightweight panels.
  • the additives and compositions used for this purpose should be simple and inexpensive, and lead to efficient liquefaction.
  • Embodiment of the Invention The problem underlying the invention is surprisingly solved by magnesium cements, processes, binder suspensions, processing aids, moldings and uses according to the patent claims.
  • the invention relates to a magnesium cement containing
  • cement refers to a curable composition in powder form or in the form of a suspension which is suitable for further processing into a solid shaped article.
  • the cement may still be largely dry or already partially or completely mixed with water.
  • the cement may be completely or partially set.
  • magnesium cement is understood according to the invention to mean a hardenable cement which contains at least one magnesium compound which acts as a binder in conjunction with water.
  • the binding properties of magnesium cements are generally based on the fact that mixed oxide compounds form from a magnesium oxide, optionally also a magnesium hydroxide, and a magnesium salt after addition of water.
  • the magnesium compounds are preferably contained in an amount sufficient to form, after curing, a matrix in which the filler is incorporated.
  • the magnesium cement contains as magnesium compounds magnesium oxide (magnesia), magnesium hydroxide and / or magnesium carbonate and additionally at least one further magnesium salt.
  • Caustic burnt magnesia is preferably used as magnesium oxide. This occurs when calcining magnesium carbonate (magnesite) at temperatures of about 800 ° C.
  • Caustic burned magnesia in water reacts with magnesium salts to form mixed oxides which have high strength.
  • the further magnesium salt is selected from magnesium sulfate, chloride, nitrate, iodide and bromide. Particularly preferred is a combination of magnesium oxide and magnesium sulfate. This mixture is preferably used in conjunction with cellulose-based fillers, such as wood wool.
  • a mixture of magnesium oxide and magnesium chloride is used.
  • Such mixtures are known in the art and are referred to as sorel cement.
  • the proportion of magnesium compounds on the dry magnesium cement is preferably at least 80% by weight, preferably at least 90 or at least 95% by weight.
  • a comb polymer which has a linear polymer skeleton and side chains attached thereto, the linear polymer skeleton having carboxylic acid groups and / or carboxylate groups.
  • “Comb polymers” are polymers whose structure resembles a comb in view of the arrangement of a large number of side chains on a single linear polymer backbone.
  • the proportion of the comb polymers on the magnesium cement is preferably between 0.05 and 8 wt .-%, in particular between 0.1 and 5 wt .-% or between 0.2 and 2 wt .-%.
  • Prior art comb polymers commonly contain side chains having a polyether component, especially a polyethylene or polypropylene component.
  • the side chains are preferably attached via ester, amide and / or ether groups to the
  • amide or side groups attached to ether groups may contain further side chains.
  • Comb polymers often have a combination of different side chains, which differ for example in terms of functional groups, length or proportion of the total side chains.
  • Such comb polymers are known in the art. They are used as plasticizers for gypsum compositions.
  • the comb polymers usually have free carboxylic acid groups and / or carboxylate groups in the main chain. It is believed that comb polymers in gypsum compositions adhere to the inorganic gypsum particles via the main chain so that the side chains are away from the inorganic particles and cause the liquefaction effect by mutual repulsion.
  • the described comb polymers are suitable for improving the processability of magnesium cements.
  • comb polymers having a relatively high proportion of carboxylic acid groups and / or carboxylate groups are particularly suitable for improving the processability of magnesium cements.
  • the beneficial properties of the comb polymers are likely to unfold as a result of adsorption to cement particles. Without being bound by theory, it is believed that the comb polymers can better bond to the surface of cement particles if they have a relatively high charge density in the polymer backbone.
  • the comb polymers probably compete with the anions of magnesium salts during adsorption, in particular with doubly negatively charged sulfate ions, and may rather displace them at high charge density in the polymer main chain.
  • the linear polymer backbone has at least 20%, at least 50%, or at least 70% carboxy groups based on the total number of monomeric subunits of the linear polymer backbone.
  • carboxy groups is understood to mean carboxylic acid groups, their salts (carboxylate groups) and their esters
  • the proportion of carboxy groups is between 20 and 95%, in particular between 50 and 95% or between 60 and 90%
  • the acid ratio (S / E) of the linear polymer backbone ie the ratio of the non-esterified carboxy groups to the esterified carboxy groups, is between 1 and 15, preferably between 2 and 10 or between 3 and 8.
  • linear polymer backbone is a polymethacrylic acid
  • an S / E ratio of between 1 and 6, in particular between 2 and 5 is particularly preferred
  • comb polymers suitable according to the invention are those which have side chains bonded to the linear polymer skeleton via ether groups.
  • Side chains attached to the linear polymer backbone via ether groups can be introduced by polymerization of vinyl ethers or allyl ethers.
  • Such comb polymers are described, for example, in WO 2006/133933 A2, the content of which is hereby incorporated by reference in particular.
  • the vinyl ethers or allyl ethers have in particular the formula (II).
  • R ' is H or an aliphatic hydrocarbon radical having 1 to 20 C atoms or a cycloaliphatic hydrocarbon radical having 5 to 8 C atoms or an optionally substituted, aryl radical having 6 to 14 C atoms.
  • R "is H or a methyl group, R '" is an unsubstituted or substituted aryl radical, in particular a phenyl radical.
  • sequence of the substructure elements designated as s5, s6 and s7 in formula (II) may here be alternating, block-like or random.
  • such comb polymers are copolymers of vinyl ether or allyl ether with maleic anhydride, maleic acid, and / or (meth) acrylic acid.
  • comb polymers KP which have side chains attached to the linear polymer skeleton via ester groups are suitable as the comb polymer KP.
  • additional amide-bound side chains are included.
  • This type of comb polymer KP is preferred over the comb polymers with side chains attached via ether groups to the linear polymer backbone.
  • Particularly preferred comb polymers KP are copolymers of the formula (I):
  • M independently of one another represents H + , alkali metal ion, alkaline earth metal ion, di- or trivalent metal ion, ammonium ion, or organic ammonium group.
  • the term "independently of one another" means that a substituent may have different meanings available in the same molecule
  • the copolymer of the formula (I) may simultaneously contain carboxylic acid groups and sodium carboxylate groups, ie M in this case independently of each other stands for FT and Na + It is clear to the person skilled in the art that on the one hand it is a carboxylate to which the ion M is bound, and on the other hand that in the case of polyvalent ions M the charge must be balanced by counterions.
  • the substituents R independently of one another represent hydrogen or a methyl group. Furthermore, the substituents R 1 independently of one another are - [AO] q -R 4 .
  • the substituents R 2 independently of one another represent a C 1 - to C 20 -alkyl group, -cycloalkyl group, -alkylaryl group or - [AO] q -R 4 .
  • the substituent A in both cases independently of one another is a C 2 to C 4 -alkylene group and R 4 is a C to C 2 o-alkyl group, cyclohexyl group or -alkylaryl group, while q is from 2 to 250, in particular from 8 to 200, more preferably from 1 to 150 represents.
  • R 3 are independently of one another - NR 5 R 6 , -OR 7 NR 8 R 9 .
  • R 5 and R 6 independently of one another are H or a C 1 - to C 20 -alkyl group, -cycloalkyl group or -alkylaryl group or -aryl group or for a hydroxyalkyl group or for an acetoxyethyl- (CH 3 -CO-O-CH 2 -CH 2 -) or a hydroxy-isopropyl- (HO-CH (CH 3 ) -CH 2 -) or an acetoxyisopropyl group (CH 3 -CO-O-CH (CH 3 ) -CH 2 -); or R 5 and R 6 together form a ring of which the nitrogen is a part to form a morpholine or imidazoline ring.
  • R 7 is independently of one another an unsubstituted or substituted alkyl radical having 1 to 10 C atoms.
  • the substituents R 8 and R 9 are each independently a Ci to C 2 o-alkyl group, - cycloalkyl group, -Alkylaryoeuvre, -Arylolitic acid or for a hydroxyalkyl group.
  • the sequence of the substructure elements designated as s1, s2, s3 and s4 in formula (I) can here be arranged alternately, blockwise or randomly.
  • the indices a, b, c and d represent molar ratios of the structural units s1, s2, s3 and s4. These structural elements are in a ratio of
  • the sum c + d is preferably greater than 0.
  • a is> 0.2 or> 0.3.
  • the preparation of the comb polymer KP of formula (I) is carried out in particular by the methods of free-radical polymerization or polymer-analogous reaction. The preparation can on the one hand by radical polymerization of the corresponding monomers of the formula (III a ), (IIIb), (Never) or (III d ), which then lead to the structural elements structural units s1, s2, s3 and s4,
  • the polycarboxylic acid of the formula (IV) is esterified or amidated with the corresponding alcohols, amines and then at most neutralized or partially neutralized (depending on the nature of the radical M, for example with metal hydroxides or ammonia).
  • Details of the polymer-analogous reaction are disclosed, for example, in EP 1 138 697 B1 on page 7 line 20 to page 8 line 50, and in its examples, or in EP 1 061 089 B1 on page 4, line 54 to page 5 line 38 and in his examples.
  • EP 1 348 729 A1 on page 3 to page 5 and in its examples the
  • particularly preferred embodiments of the comb polymers KP of the formula (I) are those in which c + d> 0, in particular d> 0.
  • the radical R 3 in particular -NH-CH 2 - CH 2 -OH has proven to be particularly advantageous.
  • Comb polymers KP as sold commercially by Sika Nurse AG under the trade name series ViscoCrete®, have proved to be particularly advantageous.
  • the magnesium cement according to the invention can be set with relatively little water.
  • the cement exhibits improved processability over compositions containing no comb polymer.
  • a cement composition according to the invention which contains water but not yet a filler and is processable, has not more than 40% by weight of water.
  • the magnesium cement may contain a further binder in addition to the clay-containing gypsum.
  • the term "binder" in addition to magnesium cement other hydraulically setting substances such as magnesium-free cements, especially Portland cements or high-alumina cements and their mixtures with flyash, silica fume, slag, blastfurnace slags and lime, especially limestone fillers and quicklime.
  • the magnesium cement according to the invention optionally contains a filler (c).
  • the magnesium cement can be processed according to the invention both with and without a filler. However, it is preferred that at least one filler is incorporated to reinforce the cement.
  • the Cement comprising (a) at least one magnesium compound and (b) at least one comb polymer may in one embodiment of the invention first be mixed with water, after which the filler is incorporated. In another embodiment, first all the dry components, including the filler (c), are mixed and water is then added.
  • the filler is in the form of organic and / or inorganic fibers.
  • the filler consists of cellulose fibers, in particular wood wool, wood fibers, wood chips, or of inorganic fibers, in particular mineral fibers such as glass wool or rock wool.
  • the cement according to the invention and the processing aid can be present in the solid state as a dry mixture.
  • a composition can be stored for a long time and is typically packaged in sacks or stored in silos. It can also be used after a long period of storage and has good flowability.
  • the magnesium cement according to the invention additionally contains preservatives, defoamers, viscosity regulators, flame retardants, water repellents, dyes, polycarboxylate ethers (PCE), accelerators, retarders, shrinkage reducers, foaming agents, heat and light stabilizers and / or pH-adjusting agents Attitude.
  • preservatives defoamers
  • viscosity regulators flame retardants
  • water repellents dyes
  • dyes polycarboxylate ethers (PCE)
  • accelerators retarders
  • shrinkage reducers foaming agents
  • heat and light stabilizers heat and light stabilizers and / or pH-adjusting agents Attitude.
  • the magnesium cement customary additives can be admixed, which are known in the prior art.
  • the subject of the invention is also a binder suspension, containing tend (a1) 25 to 75% by weight, preferably 40 to 65% by weight of magnesium oxide,
  • the binder suspension preferably contains no fillers.
  • the binder suspension is an intermediate in the production of moldings from the magnesium cement according to the invention. It contains water and is in the process of hardening. In such an aqueous binder suspension, the fillers can be incorporated.
  • An object of the invention is also a magnesium cement in the form of a suspension containing 85 to 40 wt .-% of the binder suspension according to the invention and 15 to 60 wt .-% of fillers (c).
  • the invention also provides a magnesium cement of from 85 to 40% by weight, preferably from 60 to 75% by weight, particularly preferably from 62 to 71% by weight, of the binder suspension according to the invention and from 15 to 60% by weight, preferably 25 to 40 wt .-%, particularly preferably 29 to 38 wt .-% fillers (c).
  • Another object of the invention is a method for producing a shaped body, comprising the steps
  • step (A) components (a) to (c) may basically be mixed with water in any order. In preferred embodiments, however, first the dry components (a) to (c) are mixed, after which water is added, or a suspension of components (a) and (b) is first prepared with water, after which the filler (c) is incorporated into the aqueous suspension.
  • step (A) comprises:
  • an aqueous solution of the magnesium salt in particular of magnesium sulfate or magnesium chloride, is preferably added to a solid magnesium oxide. It is preferred to mix the solution of the magnesium salt in advance with the comb polymer.
  • Another object of the invention is a molding obtained by curing a magnesium cement according to the invention or by a method according to the invention.
  • shaped body denotes a hardened, movable object which has a three-dimensional extent. The curing of the molding is carried out by drying and / or heating.
  • the shaped body is a plate, in particular a wood wool lightweight panel.
  • Wood wool lightweight panels are preferably made of magnesium cements having as magnesium compounds magnesium oxide and magnesium sulfate. The production of wood wool lightweight panels is known in the art and is described for example in DE 29 32 332. From a mixture of the magnesium cement and the optionally impregnated wood wool can be produced heat and sound insulating lightweight panels.
  • a strip molding plant is preferably used.
  • the mixture is applied to the strip molding plant, the temperature being between 60 and 100 ° C., for example.
  • the plates thus produced are dried and finished.
  • the plates thus produced are also known by the name "Heraklith plates".
  • the impregnation of the wood wool can be done in advance by spraying with a magnesium sulfate solution and dusting with magnesia.
  • the invention also provides a processing aid for magnesium cements, containing
  • a comb polymer having a linear polymer backbone and side chains attached thereto, the linear polymer backbone having carboxylic acid groups and carboxylate groups, and at least one further component selected from a magnesium compound, especially a magnesium salt, and an inorganic salt Filler, wherein the processing aid is in the form of an aqueous solution or in powder form.
  • the processing aid according to the invention is not yet reactive without the addition of further substances, such as, for example, water.
  • the processing aid can be easily added by the user to a cement base preparation.
  • the premix of components in the processing aid facilitates uniform distribution in the magnesium cement.
  • the processing aid is a polymer solution.
  • a polymer solution may contain further additives, in particular viscosity regulators, defoamers and preservatives, and also other additives such as dispersing aids, pyrogenic or colloidal silica, phosphoric acids, biocides, fungicides, calcium sulfate or amorphous aluminum oxide.
  • the invention also provides the use of a comb polymer which has a linear polymer backbone and side chains attached thereto, the linear polymer backbone having carboxylic acid groups and carboxylate groups for improving the processability, in particular for liquefaction, or for improving the stability of magnesium cements.
  • the magnesium cement according to the invention solves the problem of the invention.
  • the comb polymers By adding the comb polymers to magnesium cements, surprisingly, the water content can be significantly reduced.
  • the product properties, such as the density and strength of the cured solids are improved or at least not adversely affected. Without being bound by theory, the improvement of product shadow therefore result in that the solidified solid has a higher density and strength because of the comparatively low water content.
  • a prior art solid made with a higher water content could have voids that result from the final removal of the water by drying or sintering.
  • comb polymers whose liquefaction effect was known for gypsum compositions of the prior art also cause a liquefaction effect on magnesium cements.
  • the cured magnesium cements were not expected to have improved product properties.
  • a molded article according to the invention has a bending tensile strength according to DIN EN 196-1 of more than 0.6, in particular of more than 0.7 N / mm 2 after 30 minutes.
  • a molded article according to the invention preferably has a compressive strength according to DIN EN 196-1 of more than 4, preferably more than 5, particularly preferably more than 5.5 N / mm 2 after 30 minutes.
  • the solid density of a shaped body without fillers is preferably above 1.5, in particular above 1.55 or above 1.6 kg / m 3 .
  • the strength of the plates can be improved, although a smaller amount of a magnesium salt solution can be used. is used, whereby both the proportion of magnesium salt and the water content is lowered.
  • MgSO 4 magnesium sulfate heptahydrate
  • 120, 150 or 180 g of magnesium sulfate heptahydrate (MgSO 4 .7H 2 O) are dissolved in 1 liter of water.
  • the mixture is heated for about 2 h at 50 ° C with stirring.
  • 5.0 g of comb polymer as a 40% polymer solution with stirring.
  • 500 g of MgO are sprinkled into this solution with stirring with a suitable stirring tool (in the example 4-bladed propeller, RZR 2051, Heidolph company) within 15 s at a speed of 500 s-1. After a pause of 15 seconds to clean the wall of the mixing vessel is stirred for 120 s at 2000 s-1.
  • a suitable stirring tool in the example 4-bladed propeller, RZR 2051, Heidolph company
  • Example 1 (with 1 wt% comb polymer): 120 g / l MgSO 4
  • Example 2 (with 1 wt% comb polymer): 150 g / l MgSO 4
  • Example 3 (with 1 wt% comb polymer): 180 g / l MgSO 4
  • the suspension is filled into steel molds preheated to about 100 ° C. in accordance with DIN EN 196-1, each with three chambers of 160 ⁇ 40 ⁇ 40 mm 3 . In these steel molds, the suspension is stored covered at 100 ° C until the test date. After 15 minutes or 30 minutes, the compressive strength is tested in accordance with DIN EN 196-1. The results are in
  • the exemplary embodiments show that the savings of MgSO 4 solution made possible by the comb polymer lead to a significant increase in the compressive strength. This can either be used to increase the quality or to save MgS0 4 . In addition, there is an energy saving due to the lower moisture content of the HWL plates.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne un ciment de magnésium, contenant (a) au moins un composé de magnésium, (b) au moins un polymère en peigne qui présente une ossature polymère linéaire et des chaînes latérales liées à celle-ci, l'ossature polymère linéaire présentant des groupes acide carboxylique et/ou des groupes carboxylate, et (c) éventuellement au moins une charge. L'invention concerne également des suspensions de liant et des auxiliaires de mise en œuvre pour les ciments de magnésium, des corps façonnés, des procédés et des utilisations des ciments de magnésium.
EP11799100.0A 2010-12-24 2011-12-20 Ciment de magnésium Withdrawn EP2655288A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11799100.0A EP2655288A1 (fr) 2010-12-24 2011-12-20 Ciment de magnésium

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20100196974 EP2468698A1 (fr) 2010-12-24 2010-12-24 Ciment de magnésium
EP11799100.0A EP2655288A1 (fr) 2010-12-24 2011-12-20 Ciment de magnésium
PCT/EP2011/073451 WO2012084984A1 (fr) 2010-12-24 2011-12-20 Ciment de magnésium

Publications (1)

Publication Number Publication Date
EP2655288A1 true EP2655288A1 (fr) 2013-10-30

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EP11799100.0A Withdrawn EP2655288A1 (fr) 2010-12-24 2011-12-20 Ciment de magnésium

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CN107417241B (zh) * 2017-07-24 2020-09-11 沈阳化工大学 一种大密度型氯氧镁水泥混凝土及其制备方法
US11724537B2 (en) * 2020-05-26 2023-08-15 Champion Link International Corporation Panel and method for producing a panel
CN114685138B (zh) * 2022-04-15 2023-03-21 千年舟新材科技集团股份有限公司 一种无机胶粘剂、使用其的难燃osb复合板及制备方法

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CN108473376B (zh) * 2015-12-01 2020-12-29 克内奥斯公司 耐火镁水泥

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