EP2480600A1 - Agent complexant du fer (iii) pour la stabilisation de polymères en peigne dans des liants minéraux - Google Patents

Agent complexant du fer (iii) pour la stabilisation de polymères en peigne dans des liants minéraux

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Publication number
EP2480600A1
EP2480600A1 EP10754534A EP10754534A EP2480600A1 EP 2480600 A1 EP2480600 A1 EP 2480600A1 EP 10754534 A EP10754534 A EP 10754534A EP 10754534 A EP10754534 A EP 10754534A EP 2480600 A1 EP2480600 A1 EP 2480600A1
Authority
EP
European Patent Office
Prior art keywords
iii
complexing agent
composition according
comb
iron
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Withdrawn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
EP10754534A
Other languages
German (de)
English (en)
Inventor
Christian M. BÜRGE
André Peter
Christophe Kurz
Franz Wombacher
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
Priority claimed from EP09170837.0A external-priority patent/EP2298711B1/fr
Priority claimed from EP09170917A external-priority patent/EP2298833A1/fr
Application filed by Sika Technology AG filed Critical Sika Technology AG
Priority to EP10754534A priority Critical patent/EP2480600A1/fr
Publication of EP2480600A1 publication Critical patent/EP2480600A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/45—Heterocyclic compounds having sulfur in the ring
    • C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • C04B7/42—Active ingredients added before, or during, the burning process
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/02—Iron compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
    • C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
    • C08G65/332—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0091—Complexes with metal-heteroatom-bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/45—Heterocyclic compounds having sulfur in the ring
    • C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
    • C08K5/47—Thiazoles

Definitions

  • the invention relates to the field of additives for hydraulically setting compositions.
  • Cement production may have a more or less high chromium content.
  • the presence of water-soluble chromium (VI) in cement flour may result in prolonged skin contact
  • iron (III) compounds can frequently lose their reducing action after a relatively short time, since they can already be oxidized to inactive iron (III) compounds when air is admitted.
  • a particular disadvantage of the iron (III) compounds is that they are capable of damaging organic compounds present in the cement, in particular comb polymers, for example by iron (III) -catalyzed oxidation of the organic compound with atmospheric oxygen.
  • Comb polymers have long been used in concrete technology as a dispersant, especially as Hoch abersverhneiger because of their strong water reduction.
  • Comb polymers are only conditionally stable at elevated temperature and are destroyed within days, so that they can no longer develop their effect. It has been shown in particular that the effect of
  • Comb polymers significantly decreases when in the presence of inorganic powders, in particular hydraulic binders, in conjunction with
  • Iron (III) compounds can be used at elevated temperature. Such problems occur, for example, in the storage of hydraulic
  • Binders or when grinding hydraulic binders are used.
  • the hydraulic binders are usually over
  • silos 80 ° C, often even at over 120 ° C, stored in silos.
  • high pressures are present in silos, especially in high silos, which place particular demands on the stabilization of polymers.
  • Comb polymers are added to the binder beforehand, which is particularly useful in the production of
  • Ready mixes such as ready-mixed cement
  • Comb polymers are also used in part as grinding aids in the milling of hydraulic binders, for example clinkers, as described, for example, in WO 2005/123621 A1. Since the grinding also high temperatures, the comb polymers can
  • Object of the present invention is therefore, a
  • compositions and a method which comb polymers in the presence of iron (III) compounds, in particular in mineral binders, especially at elevated temperature, protects against damage by iron (III) compounds.
  • composition according to claim 1 can be achieved. It has now been found that by compositions comprising a
  • a comb polymer and at least one Fe (III) complexing agent X which is selected from the group consisting of thiocyanates, condensed phosphates, amines, aminoacetic acids, oxycarboxylic acids and compounds of the formula (V) comb polymers can be protected from damage by iron (III) compounds and be able to maintain their effect over a longer period even at elevated temperature in the presence of iron (III) compounds.
  • composition comprising a comb polymer and at least one Fe (III) complexing agent X, which additionally comprises an antioxidant, is particularly suitable for protecting comb polymers from damage by iron (III) compounds.
  • Comb polymers can still have their effect as grinding aids and / or as dispersants, in particular as plasticizers, after they have been exposed to high temperatures during the milling process or during long storage. Further aspects of the invention are the subject of further independent claims. Particularly preferred embodiments of the invention are the subject of the dependent claims.
  • the present invention relates to a composition
  • a composition comprising a comb polymer and at least one Fe (III) complexing agent X which is selected from the group consisting of thiocyanates condensed Phosphates, amines, amino acetic acids, oxycarboxylic acids and compounds of formula (V).
  • Fe (II) complexing agent X is a
  • complex formation constant throughout the present text means the equilibrium constant Ki for the formation of a complex compound of Fe (III), respectively Fe (II), (central ion) and a Fe (III) complexing agent X (ligand), measured in Water at room temperature.
  • thiocyanates 2-nitro-4-thiocyanatoaniline and benzyl thiocyanate, in particular benzyl thiocyanate, are preferred.
  • pyrophosphate As condensed phosphates pyrophosphate, tripolyphosphate and polyphosphate are preferred.
  • Amines and aminoacetic acids are advantageous because they can form very stable complex compounds with Fe (II).
  • amines are triethanolamine (TEA), ethylenediamine (EDA), 1 - [2- (bis (2-hydroxypropyl) amino) ethyl (2-hydroxypropyl) amino] propan-2-ol
  • DHEG N, N-di- (hydroxyethyl) -glycine
  • DETA diethylenetriamine
  • TEPA tetraethylenepentamine
  • TETA triethylenetetramine
  • NTA nitrilotriacetic acid
  • Ethylenediaminetetraacetic acid EDTA
  • CDTA cyclohexanediaminetetraacetic acid
  • DTPA diethylenetriamine pentaacetic acid
  • EGTA ethylene glycol bis (amino- ethyl ether) -N, N, N'N'-tetraacetic acid
  • HEDTA N- (2-hydroxyethyl) -ethylenediamin-N, N, N'-triacetic acid
  • TTHA triethylenetetraminehexaacetic acid
  • glycine glutamic acid, or their salts, preferably.
  • Glycine has a stability constant for Fe (III) of 6.3 ⁇ 10 10 and for Fe (II) of 2 ⁇ 10 4 .
  • Glutamate has a stability constant for Fe (II) of 6.3 x 10 13 and for Fe (II) of 4 x 10 4 .
  • NTA has a stability constant for Fe (II) of 8 x 10 15 .
  • EDTA has a stability constant for Fe (III) of 1 .3 x 10 25 and for Fe (II) of 2 x 10 14 .
  • oxycarboxylic acids 2,3-dihydroxybutanedioic acid, 2-hydroxy-1,2,3-propanetricarboxylic acid (citric acid), gluconic acid, ⁇ -hydroxybutyric acid, hydroxysuccinic acid are preferable.
  • Glycolates have a stability constant for Fe (III) of 5 ⁇ 10 3 and for Fe (II) of 8 ⁇ 10 1 .
  • Malonates have a stability constant for Fe (III) of 2 ⁇ 10 9 and for Fe (II) of 5 ⁇ 10 5 .
  • Citrate has a stability constant for Fe (II) of 3.2 ⁇ 10 13 and for Fe (II) of 5 ⁇ 10 5 .
  • Tartaric acid has a stability constant for Fe (III) of 7.2 x 10 11 . of the formula (V)
  • R 10 and R 11 independently of one another represent H, halogen atom, NO 2 or an optionally branched, saturated or unsaturated alkyl radical having 1 to 25 C atoms or an aryl radical having 6 to 14 C atoms or an acyl radical having 1 to 10 C Atoms or a carbonyl radical having 1 to 10 C atoms or a carboxyl radical having 1 to 10 C atoms, or
  • R 10 and R 1 1 are part of an aromatic or cycloaliphatic ring, in particular an aromatic 6-membered ring.
  • Examples of compounds of the formula (V) are 2-amino-5-bromothiazole, 2-amino-5-chlorothiazole, 2-amino-5-nitrothiazole, 2-aminothiazole, 2-aminothiazole-5-carboxaldehyde, 2-amino-4 thiazolecarboxylic acid, 2-amino-5- methylthiazole, 2-amino-4- (trifluoronormethyl) thiazole-5-carboxylic acid, 2-amino-4-thiazoleacetic acid, 2-amino-4,5-dinethylthiazole, 2-amino- ⁇ - (methoxyimino) -4-thiazoleacetic acid, 5 Acetyl-2-amino-4-methylthiazole, 5-acetyl-2-amino-4-methylthiazole, methyl 2-amino-4-thiazole acetate, methyl 2-amino-4-thiazole acetate, 2-amino-4,6 -di
  • the Fe (III) complexing agent X is a compound of the formula (V).
  • the Fe (III) complexing agent X is not substances which, when used in mineral binders, lead to an odor nuisance. It is particularly advantageous if the Fe (III) complexing agent X causes a reduction of Fe (III) to Fe (II).
  • the ferrous compound for reducing soluble chromium (VI) may be added to the cement either as a cement additive during cement production or as a concrete admixture in concrete production. When used as Mahlzusatzstoff the dosage can be adapted to the soluble chromium (VI) content. As a rule, 0.4% by mass (based on the cement) of iron (II) sulfate is added, so that the cements produced meet the requirements of Directive 2003/53 / EC. When used as a concrete admixture in concrete production, the addition of iron (II) compounds can not be adjusted to the chromium (VI) content of the cement, as is usually the chromium (VI) content of the cement
  • the chromium (VI) content can be up to 2 mg / kg.
  • Iron (II) compound is typically iron (II) sulfate, but other iron (II) compounds, especially iron (II) salts, are also possible.
  • iron (III) ions are typically formed by oxidation of iron (II) ions of the mentioned iron (II) compound, in particular by atmospheric oxygen or by chromium (VI) ions.
  • iron (III) ions can also be of other origin.
  • iron (III) ions can be derived from iron (III) compounds, in particular iron (III) salts.
  • the at least one comb polymer is preferably a comb polymer KP having side chains attached via ester or ether groups to the main chain.
  • Suitable comb polymers KP are, on the one hand, comb polymers with side chains bonded via ether groups to the linear polymer backbone. Bonded via ether groups to the linear polymer backbone
  • Side chains can be introduced by polymerization of vinyl ethers or allyl ethers.
  • 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.
  • Substructure elements can be alternating, block-like or random
  • such comb polymers are copolymers of
  • comb polymers having side chains bonded via ester groups to the linear polymer backbone are suitable as the comb polymer KP.
  • 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, divalent or trivalent metal ion, ammonium ion, or organic ammonium group independently of one another in each case means that a substituent can have different meanings available in the same molecule:
  • the copolymer of the formula (I) can simultaneously have carboxylic acid groups and sodium carboxylate groups, ie for M in this Trap H + and Na + are independent of each other.
  • substituents R independently of one another represent hydrogen or a methyl group.
  • the substituents R 1 independently of one another are - [AO] q -R 4 .
  • the substituents R 2 independently of one another are 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 1 - to C 20 -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 5 and R 6 are independent of each other is a C 1 to C 20 alkyl group, cycloalkyl group or alkylaryl group or aryl group, or a hydroxyalkyl group or an acetoxyethyl (CH 3 -CO-O-CH 2 -CH 2 -) or a hydroxy-isopropyl- (HO-CH (CH 3) 2) 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.
  • the substituent R 7 is a C 2 -C 4 -alkylene group.
  • substituents R 8 and R 9 each independently represent a C 1 - to C 20 -alkyl group, -cycloalkyl group, -alkylaryl group, -aryl group or a hydroxyalkyl group.
  • sequence of the substructure elements designated as s1, s2, s3 and s4 in formula (I) can here be arranged alternately, blockwise or randomly.
  • 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.
  • the preparation of the comb polymer KP of the formula (I) can on the one hand by free radical polymerization of the corresponding monomers of the formula (III a ), (III b ), (III c ) or (IIId), which then leads to the structural elements s1 s4 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 US 2002/0002218 A1 on page 5 in section [0077] to and with [0083], as well as in its examples or in US Pat. No. 6,387,176 B1 on page 5, line 18 to line 58 and in US Pat examples.
  • Embodiment of the comb polymers KP of the formula (I) are those in which c + d> 0, in particular d> 0, are.
  • the radical R 3 in particular -NH-CH 2 -CH 2 -OH has proved to be particularly advantageous.
  • Comb polymers KP such as those manufactured by Sika Nurse AG under the trade name series ViscoCrete®, have proven to be particularly advantageous
  • the weight fraction of the Fe (III) complexing agent X is typically from 0.01 to 50% by weight, preferably from 0.05 to 20% by weight, particularly preferably from 0.1 to 5% by weight, based on the total weight of the comb polymer. It is further advantageous that the composition further comprises at least one antioxidant, in particular in an amount of 0.01 to 50 wt .-%, preferably 0.05 to 10 wt .-%, particularly preferably 0.1 to 5 wt .-%, based on the total weight of the comb polymer.
  • Suitable antioxidants are, for example, selected from the group consisting of substituted phenols, in particular sterically hindered phenols; substituted hydroquinones, in particular sterically hindered hydroquinones; sterically hindered aromatic amines such as diarylamines; Arylamine-ketone condensation products; Organosulfur compounds such as dialkyl dithiocarbamic acids or dialkyl dithiophosphites; Organophosphorus compounds such as phosphites or phosphonites;
  • antioxidants which comprise at least one substituted phenol, substituted hydroquinone or a substituted aromatic amine.
  • Particularly suitable are sterically hindered phenols, sterically hindered hydroquinones or sterically hindered
  • hindered phenols examples include 2-t-butyl-4,6-dimethylphenol, 2,6-di (t-butyl) -4-methylphenol (butylhydroxytoluene, BHT), 2-t-butyl-4-methoxyphenol (butylhydroxyanisole, BHA), pentaerythrityl tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) -propionate] (Irganox® 1010), 2,6-dioctadecyl-4-methylphenol, 2,4,6-tri -t-butylphenol, ortho-tert-butylphenol, 3,5-bis (1,1-dimethylethyl) -4-hydroxybenzene-propionic acid ester of C4-C22 alcohols, 4,4'-butylidene-bis (6-t-butyl) butyl-3-methylphenol), 4,4'-methylidene-bis (2,6-di-
  • BHT 2,6-di-t-butyl-4-methylphenol
  • octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate 2,2'-methylene-bis ( 4-methyl-6-cyclohexylphenol), 2,2'-methylenebis (4-methyl-6-t-butylphenol), triethylene glycol bis-3- (t-butyl-4-hydroxy-5-methylphenyl ) propionate, 2,2-bis- (4-hydroxyphenyl) -propane, and tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate] methane, or antioxidants, as is typical marketed under the trade name Irganox® from Ciba Spezialitätenchemie, in particular 2-methyl-4,6-bis ((octylthio) methyl) phenol (Irganox® 1520), pentaerythrityl
  • hindered hydroquinones are 2,6-di-t-butyl-4-methoxyphenol, 2,5-di-t-butyl-hydroquinone.
  • Examples of sterically hindered aromatic amines and arylamine-ketone condensation products are N, N'-bis (1,4-dimethyl-pentyl) -p-phenylene- diamine, N, N'-diphenyl-p-phenylenediamine, 4- (p-toluene-sulfonamido) -diphenylamine, 4-n-butylaminophenol, 4,4'-di-t-octyldiphenylamine, 4,4'-di- ( alpha, alpha -dimethylbenzyl) diphenylannin, phenyl-beta-naphthylamine, N-isopropyl-N'-phenyl-p-phenylenediamine, and / or phenyl-2-aminonaphthalene.
  • organosulfur compounds are 2,2'-thio-bis (4-methyl-6-t-butylphenol), 2-methyl-4,6-bis ((octylthio) methyl) phenol (Irganox® 1520), 4, 4'-thio-bis (6-t-butyl-3-methylphenol), 2,2'-thiodiethyl-bis-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 2,4 Bis (n-octylthio) -6- (4-hydroxy-3,5-di-t-butylanilino) -1, 3,5-triazine, di-lauryl-3,3'-thiodipropionate, di-stearyl 3,3'-thiodipropionate, nathium dithionite, toluenesulfinic acid or derivatives thereof,
  • organophosphorus compounds are dioctadecyl 3,5-di-t-butyl-4-hydroxybenzylphosphonic acid, trimethyl phosphite, triethyl phosphite, triphenyl phosphite, distearyl pentaerythritol diphosphite, tris (nonylphenyl) phosphite, tetrakis (2,4-di-t butylphenyl-4,4'-biphenylene diphosphonite, tris (2,4-di-t-butylphenyl) phosphite, neopentyl glycol triethylene glycol diphosphite, diisodecyl pentaerythritol diphosphite, tristearyl phosphite, trilauryl phosphite, Na hypophosphite or triphenyl phosphite.
  • the antioxidant is a substituted phenol, especially a hindered phenol.
  • a substituted phenol especially a hindered phenol.
  • Such antioxidants are available, for example, under the name Irganox® from Ciba.
  • the substituted phenol is selected from the group consisting of butylhydroxytoluene (BHT), butylhydroxyanisole (BHA), bisphenol A, bisphenol F, salicylic acid, hydroquinone, vanillin,
  • Biphenyldiol for example 4,4'-biphenyldiol or 2,2'-biphenyldiol, gallates and phenol polycondensates.
  • composition as described above both in liquid and in solid form, either alone or as part of a further composition, as a dispersant, especially as condenser; be used as a grinding aid, as a thickener or as a cement refiner.
  • composition as described above may contain other ingredients. Examples of other ingredients are
  • Solvents or additives such as grinding aids, for example glycols or alkanolamines such as triisopropanolamine (TIPA) or triethanolamine (TEA);
  • TIPA triisopropanolamine
  • TAA triethanolamine
  • Contaminants for example lignosulfonates, sulfonated naphthalene-formaldehyde condensates, or sulfonated melamine-formaldehyde condensates; Accelerator; retarder; shrinkage; defoamers; Foaming agents or components which reduce segregation of the fresh concrete, in particular the separation of water (bleeding), and improve the holding power of the fresh concrete.
  • a solvent is preferably used for the reaction.
  • Solvents are, for example, alcohols, especially ethanol or isopropanol, and water, with water being the most preferred
  • Solvent is. Depending on the nature of the composition, a dispersion or solution is formed. A solution is preferred.
  • compositions may also be in solid state.
  • a composition in the solid state of aggregation is understood as meaning compositions which are in the solid state at room temperature and are, for example, powders, flakes, pellets, granules or plates and can be easily transported and stored in this form.
  • the present invention relates to a composition
  • a composition comprising a comb polymer, a mineral
  • the mineral binder typically a hydraulic binder, a latent hydraulic binder or a non-hydraulic binder, in particular a cement, preferably a Portland cement, or mixtures thereof with fly ash, silica fume, blast furnace slag and limestone filler.
  • the weight fraction of the comb polymer is 0.01 to 10 wt .-%, preferably 0.2 to 2 wt .-%, based on the total weight of the mineral binder.
  • the present invention relates to
  • the comb polymer and the Fe (II) complexing agent X are comb polymers and Fe (II) complexing agents X, as previously described.
  • stabilization is understood to mean, in particular, that the comb polymers are not degraded over a prolonged period of time and thus their effect, for example as dispersants, grinding aids, thickeners or cement refiners, is maintained
  • the Fe (II) complexing agent X in an amount of 0.01 to 50 wt .-%, preferably 0.05 to 20 wt .-%, based on the
  • Antioxidant is added.
  • As an antioxidant Compounds suitable as previously described as suitable as antioxidant.
  • the at least one antioxidant is used in an amount of 0.01 to 50% by weight, preferably 0.05 to 10% by weight, based on the total weight of the comb polymer.
  • the process is a process at a temperature of at least 40 ° C, preferably 80-160 ° C.
  • the method is a method for
  • a mineral binder compounds are suitable, as they have previously been described as suitable as a mineral binder.
  • cement clinker after the firing process at over 1000 ° C usually cooled to a temperature of about 100 to 200 ° C and normally stored at a temperature of about 80 to 150 ° C, in particular at about 80 to 120 ° C, for example in silos.
  • temperatures of at least 40 ° C, preferably from 80 to 160 ° C during milling, especially when grinding the cement clinker to cement occur.
  • subsequent storage and / or transport of the mineral binder in particular by
  • Packaging containers Therefore, it is preferably a
  • the addition of the comb polymer and / or the Fe (III) complexing agent X and / or the antioxidant to the mineral binder can take place simultaneously or with a time delay.
  • the addition of the comb polymers and / or the Fe (III) complexing agent X and / or the antioxidant to the mineral binder can be applied to the mineral binder during transport of the mineral binder, in particular when conveying cement.
  • the mineral binder, in particular cement during the production process, for example in transport channels to the deposit, for example to silo or transport such as a truck, the comb polymers and / or the Fe (III) complexing agent X and / or the antioxidant added ,
  • the addition of the comb polymers and / or the Fe (III) complexing agent X and / or the antioxidant to the mineral binder can be further added to the mineral binder prior to grinding the mineral binder, in particular before and / or during the grinding of the cement clinker.
  • the Fe (III) complexing agent X is precoated with the comb polymer (and optionally with a
  • the present invention relates to a use of a Fe (III) complexing agent X for the stabilization of
  • the comb polymer and the Fe (III) complexing agent X are comb polymers and Fe (III) complexing agents X, as previously described.
  • Portland cement (Swiss CEM I 42.5R), by mixing in a kitchen blender (Moulinex), with 1 wt .-% comb polymer (Sika® ViscoCrete® 1 10 CH, available from Sika Switzerland AG), by weight of the Portland cement, and optionally additionally with an amount (in relation to the total weight of the comb polymer) of an Fe (III) complexing agent X (KB), indicated in Table 2
  • Antioxidant (AntO) or a Fe (III) complexing agent X together with an antioxidant coated was either used immediately or placed in a transport container at 60 ° C for the in Table 2, before being used to prepare
  • the sands, filler and coated cement were dry blended for 1 minute in a Hobart mixer. Within 30 seconds, the mixing water was added and mixed for another 2.5 minutes. The water / cement value (w / c value) was 0.46. To determine the effectiveness, the slump (ABM) (Table 2) of the mortar was determined in accordance with EN 1015-3 after 0 minutes. The used determination of the
  • Slurry differs from EN 1015-3 in that it did not lift or drop the spreading table.
  • Examples 6 to 6 represent examples according to the invention, while examples 7 to 12 represent comparative examples.
  • compositions are suitable for stabilizing comb polymers even at elevated temperature (60 ° C).
  • the iron (II) content determination was carried out by means of a reflectoquant iron (II) test from Merck, Germany, according to the manufacturer's instructions.

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

Abstract

La présente invention porte sur des compositions comprenant un polymère en peigne et un agent complexant du fer (III) X, lequel est choisi dans le groupe constitué par les thiocyanates, les phosphates condensés, les amines, les acides aminoacétiques, les acides oxycarboxyliques et les composés de formule (V). L'invention porte en outre sur un procédé de stabilisation de polymères en peigne en présence de fer (III) par utilisation de tels agents complexants du fer (III) X.
EP10754534A 2009-09-21 2010-09-21 Agent complexant du fer (iii) pour la stabilisation de polymères en peigne dans des liants minéraux Withdrawn EP2480600A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10754534A EP2480600A1 (fr) 2009-09-21 2010-09-21 Agent complexant du fer (iii) pour la stabilisation de polymères en peigne dans des liants minéraux

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP09170837.0A EP2298711B1 (fr) 2009-09-21 2009-09-21 Composition et procédé de fabrication de briques silico-calcaires
EP09170917A EP2298833A1 (fr) 2009-09-22 2009-09-22 Complexants de fer (III) pour la stabilisation de polymères en peigne dans des liants minéraux
EP10754534A EP2480600A1 (fr) 2009-09-21 2010-09-21 Agent complexant du fer (iii) pour la stabilisation de polymères en peigne dans des liants minéraux
PCT/EP2010/063907 WO2011033127A1 (fr) 2009-09-21 2010-09-21 Agent complexant du fer (iii) pour la stabilisation de polymères en peigne dans des liants minéraux

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EP2480600A1 true EP2480600A1 (fr) 2012-08-01

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US (1) US20120178854A1 (fr)
EP (1) EP2480600A1 (fr)
JP (1) JP2013505317A (fr)
KR (1) KR20120099417A (fr)
CN (1) CN102575054B (fr)
AU (1) AU2010297199A1 (fr)
BR (1) BR112012006112A2 (fr)
MX (1) MX2012003366A (fr)
WO (1) WO2011033127A1 (fr)

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CN108423668A (zh) * 2018-06-05 2018-08-21 刘玉婷 一种石墨烯生产工艺
CN112028526A (zh) * 2020-09-14 2020-12-04 泰山石膏有限公司 一种石膏缓凝剂及其制备方法和应用

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WO2007065952A1 (fr) * 2005-12-08 2007-06-14 Sika Technology Ag Composition et son utilisation pour l’amelioration de la maniabilite de compositions a prise hydraulique
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US2531700A (en) * 1949-01-07 1950-11-28 Resistoflex Corp Polyvinyl alcohol compositions containing corrosion inhibitor
US20090199741A1 (en) * 2004-09-06 2009-08-13 Sika Technology Ag Method For Producing A Coated Basic Material For A Hydraulic Composition, Coated Basic Material For A Hydraulic Composition, Additive For A Hydraulic Composition And Method For Producing A Hydraulic Composition
WO2007065952A1 (fr) * 2005-12-08 2007-06-14 Sika Technology Ag Composition et son utilisation pour l’amelioration de la maniabilite de compositions a prise hydraulique

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KR20120099417A (ko) 2012-09-10
US20120178854A1 (en) 2012-07-12
CN102575054A (zh) 2012-07-11
MX2012003366A (es) 2012-05-08
WO2011033127A1 (fr) 2011-03-24
AU2010297199A1 (en) 2012-04-05
CN102575054B (zh) 2014-06-25
BR112012006112A2 (pt) 2019-09-10
JP2013505317A (ja) 2013-02-14

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