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WO2022194996A1 - Copolymères utiles pour retenir un écoulement d'affaissement élevé de composition minérale de liant, leur production et leur utilisation - Google Patents

Copolymères utiles pour retenir un écoulement d'affaissement élevé de composition minérale de liant, leur production et leur utilisation Download PDF

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Publication number
WO2022194996A1
WO2022194996A1 PCT/EP2022/056946 EP2022056946W WO2022194996A1 WO 2022194996 A1 WO2022194996 A1 WO 2022194996A1 EP 2022056946 W EP2022056946 W EP 2022056946W WO 2022194996 A1 WO2022194996 A1 WO 2022194996A1
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WO
WIPO (PCT)
Prior art keywords
copolymer
mineral binder
general formula
methyl
monomer
Prior art date
Application number
PCT/EP2022/056946
Other languages
English (en)
Inventor
Yalei CHEN
Jiali ZHU
Chao YU
Jianghong Liu
Hailang GAO
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 CN202280021683.1A priority Critical patent/CN117043206A/zh
Publication of WO2022194996A1 publication Critical patent/WO2022194996A1/fr

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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
    • 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
    • C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
    • C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
    • 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
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2605—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
    • 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
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/04—Acids; Metal salts or ammonium salts thereof
    • C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
    • C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
    • C08F299/026—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from the reaction products of polyepoxides and unsaturated monocarboxylic acids, their anhydrides, halogenides or esters with low molecular weight
    • 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
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/60—Flooring materials
    • C04B2111/62—Self-levelling compositions
    • 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

  • Copolymers useful to retain high slump flow of mineral binder composition their production and use
  • the present invention relates to copolymers comprising at least structural motives of two polyethers of different chain length as well as carboxylates.
  • the present invention also relates to the use of such copolymers as plasticizers for mineral binder compositions. Especially, copolymers of the present invention have been found to retain a high slump flow over longer periods of time.
  • Copolymers of polycarboxylates and polyalkylene glycols are known for many years as dispersion aids for aqueous dispersions, especially for aqueous dispersions of mineral binders.
  • PCE act as superplasticizers and reduce the water needed to achieve a certain level of fluidity of a given uncured mineral binder composition.
  • a reduction of water in mineral binder compositions, especially in cementitious compositions, is desirable as it leads to less segregation of solid components in the uncured composition and to an increased compressive strength of the cured composition.
  • CN 106243288 discloses copolymers and their production, the copolymers comprising alkenyl polyoxyethylene ether with a molecular weight of 1200 -2400 g/mol and ethylenically unsaturated carboxylic acid. The use of such copolymers to reduce the water demand of mineral binder compositions is also disclosed.
  • CN 103483504 discloses copolymers and their production, the copolymers comprising two different alkenyl polyethers which differ in the type of alkenyl group and the molecular weight of the polyether chain.
  • the use of such copolymers to reduce the water demand of mineral binder compositions is also disclosed.
  • the copolymers described in the prior art are not in all cases suitable as plasticizers for mineral binder composition.
  • mineral binder compositions have a large variation in possible components. Different mineral binders used, different aggregates used, different mix ratios of components, etc. may require different copolymers as plasticizers. This is especially the case with the more widespread use of manufactured sand and high alkali concrete. There is thus a constant need for improved copolymers to influence the water demand and/or the rheology of mineral binder compositions.
  • copolymers of the present invention have the effect of retaining the slump and/or slump flow of a mineral binder composition over long periods of time.
  • a mineral binder composition comprising an inventive copolymer is retained over longer periods of time as compared to the same mineral binder composition but comprising a polycarboxylate ether type copolymer that is not according to the invention.
  • the present invention relates to copolymers obtained by copolymerization of
  • R 1 , R 2 , and R 3 independently of each other are H or methyl
  • R 1 , R 2 , and R 3 independently of each other are H or methyl
  • R 4 is H, C1-C20 alkyl, aralkyl or aryl,
  • R u and R v independently of each other are H or methyl
  • R P is H or COOM
  • M is selected from H, alkali metal, alkali earth metal, ammonium, or organic ammonium group; and (iv) optionally at least one monomer d of the general formula (IV) where
  • R u and R v independently of each other are H or methyl
  • Monomer c preferably is selected from acrylic acid, methacrylic acid, and/or maleic acid.
  • the molar ratios of the at least one monomer a, the at least one monomer b, the at least one monomer c, and optionally the monomer d in a copolymer of the present invention are as follows: a: 1 - 5, b: 1 , c: 1.5 - 30, d: 0 — 2.
  • the molar ratios of monomers a, b, c, and optionally d in a copolymer of the present invention vary in a range of a : b : c : d of 1 - 5 : 1 : 1.5 - 30 : 0 - 2.
  • the molar ratios vary in a range of 1 — 4 : 1 : 5 — 25 : 0 - 2, more preferably in a range of 1 - 4 : 1 : 5.5 - 25 : 0 - 2.
  • R 1 is methyl, R 2 and R 3 are H,
  • R 1 is methyl
  • R 2 and R 3 are H
  • R 4 is H
  • A is ethylene
  • n 70 - 150.
  • R 5 is a hydroxyethyl group.
  • a copolymer of the present invention is obtained by copolymerization of (i) at least one monomer a of the general formula (I) where
  • R 1 is methyl, R 2 and R 3 are H,
  • R 1 is methyl, R 2 and R 3 are H,
  • R 4 is H
  • R u and R v independently of each other are H or methyl
  • R P is H or COOM
  • M is selected from H, alkali metal, alkali earth metal, ammonium, or organic ammonium group.
  • the molar ratios of monomers a, b, and c in such a copolymer are as follows: a: 1 - 5, preferably 1 - 4, b: 1, c: 1.5 - 30, preferably 5 - 25, more preferably 5.5 - 25.
  • Copolymers without an ester group, that is copolymers without a monomer d often show an improved storage stability over time.
  • a copolymer of the present invention is obtained by copolymerization of (i) at least one monomer a of the general formula (I) where
  • R 1 is methyl, R 2 and R 3 are H, R 4 is H,
  • R 1 is methyl, R 2 and R 3 are H,
  • R u and R v independently of each other are H or methyl
  • R P is H or COOM
  • M is selected from H, alkali metal, alkali earth metal, ammonium, or organic ammonium group;
  • R u and R v independently of each other are H or methyl
  • R 5 is hydroxyethyl or hydroxypropyl.
  • the molar ratios of monomers a, b, c and d in such a copolymer are as follows: a: 1 - 5, preferably 1 - 4, b: 1 , c: 1 .5 - 30, preferably 5 - 25, more preferably 5.5 - 25, d: 0.1 - 2.
  • the molar ratio of monomer c relative to all monomers constituting the copolymer is more than 50 mol%, preferably more than 66 mol%.
  • a copolymer of the present invention is obtained by copolymerization of (i) at least one monomer a of the general formula (I) where
  • R 1 is methyl, R 2 and R 3 are H,
  • R 4 is H
  • R u and R v independently of each other are H or methyl
  • R P is H or COOM
  • M is selected from H, alkali metal, alkali earth metal, ammonium, or organic ammonium group;
  • R u and R v independently of each other are H or methyl, and R 5 is hydroxyethyl or hydroxypropyl.
  • the molar ratios of monomers a, b, c and d in such a copolymer are as follows: a: 1 - 5, preferably 1 - 4, b: 1 , c: 1 .5 - 30, preferably 5 - 25, more preferably 5.5 - 25, d: 0 - 2, preferably 0.
  • a copolymer of the present invention is obtained by copolymerization of (i) at least one monomer a of the general formula (I) where
  • R 1 is methyl, R 2 and R 3 are H, R 4 is H,
  • R 1 is methyl, R 2 and R 3 are H, R 4 is H,
  • R u and R v independently of each other are H or methyl
  • M is selected from H, alkali metal, alkali earth metal, ammonium, or organic ammonium group;
  • R u and R v independently of each other are H or methyl, and R 5 is hydroxyethyl or hydroxypropyl.
  • the molar ratios of monomers a, b, c and d in such a copolymer are as follows: a: 1 - 5, preferably 1 - 4, b: 1, c: 1.5 - 30, preferably 5 - 25, more preferably 5.5 - 25, d: 0 - 2, preferably 0.
  • Copolymers of the present invention are obtained by copolymerization of the respective monomers.
  • Copolymerization is a process known to the person skilled in the art.
  • the copolymerization is a process of radical polymerization of the different monomers. Suitable conditions for a process of radical polymerization are for example described in EP1103570.
  • Copolymers of the present invention can be statistical copolymers or have a block-wise or gradient arrangement of the monomers. Statistical copolymers are preferred.
  • the molecular weight M of a copolymer of the present invention can be measured by GPC using PEG as a standard and may be in the range of 5000 - 200000 g/mol, preferably 10000 - 150000 g/mol.
  • copolymers of the present invention can be in the form of a dispersion or a solution in a liquid, preferably in water. According to further embodiments, copolymers of the present invention can be in the form of a powder. Powders can be preferred for example, where the copolymers of the present invention are to be mixed with other dry ingredients to form dry concrete or mortars. The shelf life of such dry concrete or mortar can be improved if the copolymer of the present invention is used therein in powder form.
  • Means to produce powders of copolymers of the present invention are not particularly limited and are known to the person skilled in the art per se. Such means include spray drying, oven drying, flaking, etc.
  • the present invention relates to the use of a copolymer as described above as an admixture in mineral binder compositions.
  • a mineral binder composition within the present context is a composition comprising at least one mineral binder.
  • a mineral binder in the context of the present invention, is a binder, which in the presence of water reacts in a hydration reaction to form solid hydrates or hydrate phases.
  • This can be, for example, a hydraulic binder (e.g. cement or hydraulic lime), a latent hydraulic binder (e.g. slag), a pozzolanic binder (e.g. fly ash) or a nonhydraulic binder (gypsum plaster or white lime).
  • a hydraulic binder e.g. cement or hydraulic lime
  • a latent hydraulic binder e.g. slag
  • a pozzolanic binder e.g. fly ash
  • nonhydraulic binder gypsum plaster or white lime
  • the mineral binder composition comprises a hydraulic binder, preferably cement.
  • a hydraulic binder preferably cement.
  • the cement is of the type CEM I, II, III, IV or V (according to the standard EN 197-1 ) or a calcium aluminate cement (according to the standard EN 14647:2006-01) or a calcium sulphoaluminate cement or a mixture thereof.
  • a proportion of the hydraulic binder in the total mineral binder is advantageously at least 5% by weight, in particular at least 20% by weight, preferably at least 35% by weight, especially at least 65% by weight.
  • the mineral binder consists to an extent of at least 95% by weight of a hydraulic binder, in particular cement clinker.
  • the cement additionally contains up to 40 w%, preferably up to 35 w%, especially up to 20 w%, each based on the total dry weight of the cement, of a calcium sulfate.
  • the calcium sulfate may be present in the form of calcium sulfate-hem ihydrate, calcium sulfate-dihydrate and/or anhydrite.
  • the mineral binder composition comprises other binders in addition to or instead of a hydraulic binder.
  • binders in addition to or instead of a hydraulic binder.
  • latent hydraulic binders and/or pozzolanic binders are, for example, slag, fly ash, silica dust, silica fume, rice husk shale, burnt shale, trass, and pumice.
  • the mineral binder contains 5-95% by weight, in particular 5-65% by weight, especially 15-35% by weight, of latent hydraulic and/or pozzolanic binders, relative to the total dry weight of the mineral binder.
  • the mineral binder composition of may also be based on calcium sulfate and/or lime as a binder.
  • Calcium sulfate is meant to encompass any of anhydrite, alpha- and beta-calcium sulfate hem ihydrate, and calcium sulfate dihydrate.
  • Lime is meant to encompass any of hydraulic lime, air lime, and natural hydraulic lime.
  • Copolymers of the present invention are used in a mineral binder composition in an amount of 0.01 w% - 10 w%, preferably 0.1 - 2 w%, relative to the total weight of the mineral binder.
  • the present invention thus also relates to a mineral binder composition
  • a mineral binder composition comprising at least one mineral binder and 0.01 w% - 10 w%, preferably 0.1 - 2 w%, relative to the total weight of the mineral binder, of a copolymer as described above.
  • a mineral binder composition of the present invention may also comprise further ingredients.
  • such further ingredients are selected from at least one of aggregates, fillers, additives, and water.
  • aggregate refers to mineral materials that are non-reactive in the hydration reaction of mineral binders.
  • Aggregates can be any aggregate typically used for cementitious materials such as concrete, mortars, screeds, renders, grouts, coatings, putties or the like. Typical aggregates are for example rock, crushed stone, gravel, slag, limestone, sand, recycled concrete, perlite or vermiculite.
  • Fillers within the present context, are mineral additions of low particle size that have no cementitious properties. Typical fillers are finely ground calcium carbonates.
  • Additives can be any typically used in the concrete or mortar industry. Typical additives include plasticizers, thickeners, retarders, air-entrainers, de-aerating agents, corrosion inhibitors, fibers, synthetic organic polymers, expansion producing additives, pigments, strength enhancers, waterproofing additives, alkali-aggregate reaction inhibitors, chromate reducers, and/or anti-microbial agents.
  • Copolymers of the present invention have the effect of retaining the slump and/or slump flow of a mineral binder composition over long periods of time. Especially the slump and/or slump flow of a mineral binder composition comprising an inventive copolymer is retained over longer periods of time as compared to the same mineral binder composition but comprising a polycarboxylate ether type copolymer that is not according to the invention. Thus, copolymers of the present invention are used as an admixture for mineral binder compositions to increase the slump retention and/or slump flow retention thereof.
  • a mineral binder composition as described above can be used as as a concrete, a mortar, a screed, a render, a plaster, a grout, an adhesive, a waterproofing membrane, an underlayment, or a water plug.
  • the present invention thus also relates to the use of a mineral binder composition as described above as a concrete, a mortar, a screed, a render, a plaster, a grout, an adhesive, a waterproofing membrane, an underlayment, or a water plug.
  • the mineral binder composition can be part of a building or work of construction.
  • Polymer P3 was prepared in the same way as polymer P1 , except that 27g of acrylic acid were added.
  • Polymer P6 was prepared in the same way as polymer P5, except that 67.5 g of acrylic acid were added.
  • Polymer P7 was prepared in the same way as polymer P 1 , except that 39 g of 3- hydroxypropylacrylate were added instead of the 39 g of acrylic acid.
  • M methallyl polyethylene glycol
  • M 2400 g/mol
  • Microconcrete was prepared by slowly mixing 1371 g of sand (0.1 - 4.75 mm) with 100 g of water for 30 seconds. After waiting for 4 minutes, 589 g of Portland Cement (Jinfeng P.042.5) are added and slow mixing is continued for 1 minute. Then, another 170 g of water and the respective polymer as indicated in below table 2, the dosage in each case being given relative to the weight of cement, were added to this mix and mixing continued for another 2 minutes.
  • the slump flow was determined in accordance with standard EN 12350-5 after the times as indicated in table 2, where 0 min relates to a test performed directly after finalizing the mixing.
  • Examples M1, M3, M4, M6, M7, M8, M9, and M10 are according to the present invention, while examples M-Ref1, MRef-2, MRef-3, MRef-4, MRef-5, and MRef-6 are not according to the present invention.
  • Table 2 microconcrete details and results
  • Concrete test results Concrete was prepared by mixing 280 g of Portland Cement (Jinfeng P.042.5), 790 g of sand, 1030 g of gravel (5 - 25 mm), 80 g of fly ash type II and 180 g of water. The amount of the respective polymer as indicated in below table 3, in each case relative to the weight of cement, were added to this mix.
  • the slump flow was determined in accordance with standard EN 12350-5 after the times as indicated in table 3, where 0 min relates to a test performed directly after finalizing the mixing.
  • Examples C1 to C4 are according to the present invention, while example C-Ref1 is not according to the present invention.
  • Example C5 is according to the present invention, while example C-Ref2 is not according to the present invention.
  • Table 4 Concrete details and results
  • copolymers of the present invention have the effect of increasing the initial slump and of retaining the slump flow of concrete compositions over long periods of time. Especially the slump is increased and the slump flow is retained over longer periods of time of a concrete composition comprising an inventive copolymer as compared to the same concrete composition but comprising a polycarboxylate ether type copolymer that is not according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

La présente invention concerne des copolymères comprenant des carboxylates et au moins deux monomères différents présentant des chaînes polyéther différant dans la longueur de chaîne du polyéther. La présente invention concerne également l'utilisation de tels copolymères en tant que plastifiants pour des compositions minérales de liant. En particulier, les copolymères de la présente invention ont été découverts pour conserver un écoulement d'affaissement élevé sur des périodes de temps plus longues.
PCT/EP2022/056946 2021-03-17 2022-03-17 Copolymères utiles pour retenir un écoulement d'affaissement élevé de composition minérale de liant, leur production et leur utilisation WO2022194996A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280021683.1A CN117043206A (zh) 2021-03-17 2022-03-17 可用于保持矿物粘结剂组合物的高坍落扩展度的共聚物、它们的制备和用途

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CN202110284783.0 2021-03-17
CN202110284783.0A CN113072668A (zh) 2021-03-17 2021-03-17 可用于保持矿物粘结剂组合物的高坍落流动度的共聚物、它们的制备和用途

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WO2022194996A1 true WO2022194996A1 (fr) 2022-09-22

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Citations (6)

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Publication number Priority date Publication date Assignee Title
EP1103570A2 (fr) 1999-11-29 2001-05-30 Nippon Shokubai Co., Ltd. Copolymère pour compositions de ciment leur procédé de fabrication et utilisation
CN103483504A (zh) 2013-09-12 2014-01-01 四川同舟化工科技有限公司 两种结构的聚醚大单体组合制备聚羧酸减水剂的方法
EP2873655A1 (fr) * 2013-11-18 2015-05-20 Sika Technology AG Entraineur d'air pour des liants hydrauliques
CN106243288A (zh) 2016-08-02 2016-12-21 重庆三圣特种建材股份有限公司 一种混凝土保坍剂及其制备方法
CN106366257A (zh) * 2016-09-13 2017-02-01 科之杰新材料集团有限公司 一种低敏感抗泥交叉支链型聚羧酸减水剂及其制备方法
CN110423038A (zh) * 2019-09-03 2019-11-08 北京金隅水泥节能科技有限公司 减水剂及其制备方法、防冻剂及其用途以及混凝土

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