EP3052452A1 - Utilisation de poly(oxyalkylène)oxy-aminoalkyltrialcoxysilanes ou de poly(oxyalkylène) aminoalkyltrialcoxysilanes comme agents dispersants - Google Patents

Utilisation de poly(oxyalkylène)oxy-aminoalkyltrialcoxysilanes ou de poly(oxyalkylène) aminoalkyltrialcoxysilanes comme agents dispersants

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Publication number
EP3052452A1
EP3052452A1 EP14777340.2A EP14777340A EP3052452A1 EP 3052452 A1 EP3052452 A1 EP 3052452A1 EP 14777340 A EP14777340 A EP 14777340A EP 3052452 A1 EP3052452 A1 EP 3052452A1
Authority
EP
European Patent Office
Prior art keywords
use according
general formula
alkyltrialkoxysilane
methyl
group
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Withdrawn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
EP14777340.2A
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German (de)
English (en)
Inventor
Martin Ernst
Achim Fessenbecker
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to EP14777340.2A priority Critical patent/EP3052452A1/fr
Publication of EP3052452A1 publication Critical patent/EP3052452A1/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Withdrawn legal-status Critical Current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
    • 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
    • C08G65/336—Polymers modified by chemical after-treatment with organic compounds containing silicon
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/42—Glass
    • 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
    • C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
    • C04B24/42—Organo-silicon compounds
    • 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
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
    • 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
    • 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
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy groups
    • 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
    • C04B2103/40—Surface-active agents, dispersants
    • C04B2103/408—Dispersants
    • 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
    • C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/28—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
    • C08G2650/50—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing nitrogen, e.g. polyetheramines or Jeffamines(r)
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • the present invention relates to the use of poly (oxyalkylene) oxy- or poly (oxyalkylene) aminoalkyltrialkoxysilanes as dispersants for aqueous suspensions of aggregates and hydraulic binders, and the aqueous suspensions as such.
  • the invention also relates to a process for the preparation of the alkyltrialkoxysilanes and the alkyltrialkoxysilanes as such.
  • Aqueous suspensions of an aggregate and a hydraulic binder are often added adjuvants in the form of dispersants to influence their chemical and / or physical properties. This is in particular to prevent the formation of solid agglomerates, as well as to disperse the particles already existing and newly formed by hydration so as to suppress sedimentation tendency and to improve processability such as kneadability, spreadability, sprayability, pumpability or flowability , This effect is also specifically exploited in the production of building material mixtures containing hydraulic binders such as cement, plaster and wall binder, or hydraulic lime.
  • hydraulic binders such as cement, plaster and wall binder, or hydraulic lime.
  • auxiliaries which are generally referred to as water-reducing or flow agents are used.
  • Conventionally used flow agents are, for example, sulfonated melamine-formaldehyde condensates (SMF), sulfonated naphthalene-formaldehyde condensates (SNF) or lignosulfonates.
  • the new-generation flow agents are polycarboxylate esters and ethers. These generally consist of a backbone based on poly (meth) acrylate and several side chains attached via ester groups, and are often referred to as comb polymers. While the backbone is negatively charged at alkaline pHs due to the numerous carboxylate groups, the side chains, such as polyethylene glycol side chains, usually have no charge. Due to the negatively charged main chain, the polycarboxylates are adsorbed on charged particle surfaces. Determine the amount of polymer adsorbed due to the negative charge and the nature of the side chain of the polymer the density and the thickness of the adsorbed polymer layer, which in turn influences the flowability of the polymer-modified suspension.
  • the anionic charge of the polycarboxylates allows the adsorption to the particles only, the dispersing effect is significantly caused by a steric effect of the polyoxyethylene side chains. Both the side chain length and the side chain density of the polycarboxylates play a role.
  • EP 0 803 521 A1 discloses, for example, block copolymers comprising polyalkylene glycol and polyglyoxylate structural units and their use as cement dispersants.
  • No. 5,879,445 A discloses compounds which comprise at least one phosphonic aminoalkylene group and at least one polyoxyalkylated chain and their use as flow agents for aqueous suspensions of mineral particles and hydraulic binders.
  • EP 444 542 discloses polyethylenimine phosphonate derivatives as flow agents which allow the viscosity of deep well cement compositions to be lowered to such an extent that they are pumpable even in the presence of salts under turbulent flow conditions.
  • EP 1203046 B1 describes dispersants with trialkoxysilane groups of the general formula
  • R is independently selected from H, methyl, ethyl, propyl and styrene
  • R 1 is selected from H, Ci-Cis-alkyl, phenyl, benzyl and alkylsulfonate;
  • R 2 is selected from H, Ci-C6-alkyl
  • n is a number from 10 to 500 and
  • the object underlying the present invention is to provide a dispersant, which is particularly well suited as a flow agent / water reducing agent for aqueous Sus pensions of aggregates and hydraulic binders and the setting time of the hydraulic binder delayed much less by the introduced Phosphonat- group amount or Carboxylate group amount is kept low.
  • the invention therefore provides the use of a poly (oxyalkylene) oxy- or poly (oxyalkylene) aminoalkyltrialkoxysilane of the general formula (I) as a dispersant for aqueous suspensions of an aggregate and a hydraulic binder,
  • -X- is -O- or -N (R 4 ) 2 - a -;
  • -Z- is -O- (CH 2 ) dC (R 5 ) 2 -c;
  • a is 1 when -X- is -O-, and 1 or 2 when -X- is -N (R 4) 2 a -;
  • d is 0 or 1
  • n is independently selected from an integer of 1 to 6;
  • p is a number from 7 to 200;
  • R 1 is the same or different and selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n -butyl, iso -butyl, sec -butyl, tert -butyl and phenyl;
  • R 2 is H or methyl
  • R 3 , R 4 , R 5 are each the same or different and independently selected from the group consisting of H, and linear or branched Ci-C6-alkyl;
  • R 6 is the same or different and is independently selected from the group consisting of H, methyl and ethyl;
  • R 7 is selected from the group consisting of H, linear or branched Ci-C6-alkyl, linear or branched Ci-Cio-alkanoyl, and C6-Cio-aryloyl.
  • the alkyltrialkoxysilane of the general formula (I) has no anionic groups, as do the dispersants known from the prior art. Therefore, it probably does not adsorb due to the charge on charged surfaces of solid particles. Rather, the alkyltrialkoxysilane of the general formula (I) presumably binds covalently to silicate phases of particles of the hydraulic binder under the basic conditions prevailing in the aqueous suspension.
  • the trialkoxysilane group presumably acts as an anchor in order to fix the polyoxyalkylene chain to the particle surface of the aggregate to be dispersed.
  • the steric effect of the polyoxyalkylene chain causes the dispersing effect, which positively influences the fluidity of the aqueous suspension.
  • the alkyltrialkoxysilane of the general formula (I) has only one consisting of a polyoxyalkylene group first molecule segment (molecule segment C), via a heteroatom X to one or two of an alkylene spacer and a Trialkoxysilanuite existing second molecule segment (Molekulargment A) is bound.
  • molecule segment C polyoxyalkylene group first molecule segment
  • a heteroatom X to one or two of an alkylene spacer
  • a Trialkoxysilanolitic molecule segment Molekulargment A
  • the alkyltrialkoxysilane of the general formula (I) consists of a molecule segment C, which is bound via an oxygen atom to a second molecule segment (A).
  • the alkyltrialkoxysilane of the general formula (I) has one or two molecule segments A, which via a nitrogen atom to the Molecular segment C are bound.
  • the alkyltrialkoxysilane of the general formula (I) contains, in addition to the molecule segments A and C, another molecule segment B which makes it possible to increase the number of trialkoxysilane groups. This is accomplished by using a tertiary or quaternary carbon atom containing multiple oxymethylene substituents.
  • the alkyltrialkoxysilane of the general formula (I) has three molecule segments C, which are bound to the molecule segment A via the molecule segment B, -O-CH 2 -C (R 5 ) 2-c-.
  • c 2.
  • the alkyltrialkoxysilane in this embodiment has the following formula (Ic)
  • the alkyltrialkoxysilane of the general formula (I) has two molecule segments C, which are bound to the molecule segment A via the molecule segment B, -O-CH 2 -C (R 5 ) 2-c-.
  • the alkyltrialkoxysilane in this embodiment has the formula (Id)
  • the alkyltrialkoxysilane of the general formula (I) also contains the molecule segments A, B and C.
  • the alkyltrialkoxysilane of the general formula (I) has two molecule segments C which, via the molecule segment B, -O-C (R 5 ) 2-c-, are attached to the molecule molecule. ment A are bound.
  • p is preferably a number from 21 to 125.
  • R 2 H.
  • R 3 H.
  • m 1 or 2.
  • R 6 is independently selected from H, methyl and ethyl.
  • the individual radicals R 6 , H, methyl and ethyl can be arranged either randomly distributed on the polyethylene oxide chain consisting of p alkylene oxide units, or in the form of one or more blocks of identical radicals.
  • a "block of identical radicals" is to be understood as meaning a part of the polyethylene oxide chain consisting of at least 2 directly adjacent alkylene oxide units, in which the alkylene oxide units have identical radicals R 6 .
  • R 7 is H, methyl or acetyl. Particularly preferred are H and methyl.
  • the terms "flow agent” and "water reducing agent” are to be understood as meaning an additive which leads to an improvement in the processability and / or to a reduction in the water requirement in the preparation of the aqueous suspension.
  • the flux is suitable in principle for three applications. One application pursues the goal of liquefying or reducing the viscosity of the aqueous suspension at a given ratio of water to hydraulic binder. In another application, the superplasticizer is added in order to achieve a water savings while maintaining the consistency - and thus consistently good processability - of the aqueous suspension. This makes it possible to reduce the ratio of water to hydraulic binder.
  • the third application is to achieve both the liquefaction and a water saving by the addition of the solvent.
  • the alkyltrialkoxysilane of the general formula (I) can be diluted or added undiluted at different stages of the preparation of aqueous suspensions, namely already in the preparation of the binder or only at the stage of making the binder with water and, if necessary, further surcharges.
  • it can be added, for example, in the grinding of cement before, together with or after the addition of grinding aids, early strength enhancers, other flow agents and water reducers, or alone. It can also be sprayed on components of finished dry mortar mixes. It unfolds its effect at the time when the powdery mixtures and granules are contacted with water for use in the form of the aqueous suspension.
  • the alkyltrialkoxysilane of the general formula (I) is generally water-soluble or water-dispersible.
  • the alkyltrialkoxysilanes may be liquid or solid, often having a waxy consistency. It is advantageous to provide the Alkyltnalkoxysilans of the general formula (I) in the form of an aqueous solution in order to facilitate the dosage in the possible applications fertilize. This may contain other additives such as deaerators, defoamers, emulsifiers and concrete additives.
  • the alkyltnalkoxysilane of the general formula (I) can be provided as a powder, also as a powder containing a carrier such as silica or CaCO 3, or as a flake. Preference is given to the provision of the alkyltnalkoxysilane of the general formula (I) in the form of an aqueous solution or as a powder.
  • the alkyltrialkoxysilane When using the Alkyltnalkoxysilans of the general formula (I) as a dispersant for aqueous suspensions of an aggregate and a hydraulic binder binds the alkyltrialkoxysilane probably covalently on silicate phases of particles of the hydraulic binder. Accordingly, the alkyltrialkoxysilane should, for example, bind to tricalcium silicate (alite) and / or dicalcium silicate (belite) phases of the clinker particles in the cement. Of course, it should also bind to silicate phases present in the selected aggregate.
  • alite tricalcium silicate
  • belite dicalcium silicate
  • the alkyltrialkoxysilane of the general formula (I) is therefore particularly suitable for hydraulic binders which have a SiO 2 content of at least 2% by weight, based on the dry mass of the hydraulic binder.
  • Hydraulic binders are understood as meaning binders which, after mixing with water, harden both in the air and under water, and remain solid and stable even after hardening under water.
  • the aqueous suspension is generally a building material mixture, preferably concrete or mortar.
  • Preferred hydraulic binders are cement, hydraulic lime and geopolymeric silicate binder.
  • the hydraulic binder is selected from cement and geopolymeric silicate binder.
  • the hydraulic binder is selected from Portland cement, Portland metallurgical cement, Portland silica dust cement, Portland pozzolana cement, Portland fly ash cement, Portland slate cement, Portland limestone cement, Portland composite cement, blast furnace cement, pozzolana cement, composite cement and mixtures thereof.
  • the term "aggregate” means all types of aggregates which can be enclosed in hydraulic binders and have suitable stability in space Suitable aggregates include, for example, uninterrupted gravels and sand, crushed stone, chippings, crushed sands, rock, blast furnace slag, clinker fracture, recycled concrete, pumice, lava, lava, diatomaceous earth, expanded, expanded clay, huts, barytes, magnetite, hematite, Limonite and Scrap Optional additives may be present in the aqueous suspension Additives for the purposes of the present invention are liquid, powdery or granular substances which are added to the suspension in small amounts, based on the dry mass of the hydraulic binder. can be added.
  • Suitable additives include thickening accelerators, setting retarders, air entraining agents, sealants, foaming agents, defoamers, solidification accelerators, hardening accelerators, corrosion inhibitors, sedimentation reducers, other flow agents and water-reducing agents other than alkyltrialkoxysilane of general formula (I), eg polycarboxylate ethers, beta-naphthylsulfonic acid-formaldehyde Condensates (BNS), lignin sulphonate, sulphonated melamine-formaldehyde condensate and mixtures thereof.
  • BNS beta-naphthylsulfonic acid-formaldehyde Condensates
  • additives and fibers may also be present in the aqueous suspension.
  • additives in the sense of the present invention are fine inorganic or organic substances which are used to purposefully improve or achieve properties, including virtually inactive additives such as minerals or pigments, as well as pozzolanic or latently hydraulic additives such as trass, fly ash, silica fume and granulated blastfurnace "fibers" in the sine of the present invention are steel fibers, polymer fibers and glass fibers of various sizes.
  • the aqueous suspension contains an additive.
  • the additive is selected from glass fibers.
  • water for the aqueous suspension for example, drinking water, groundwater and natural surface water (e.g., river, lake, spring) are suitable.
  • natural surface water e.g., river, lake, spring
  • the amount of alkyltrialkoxysilane of the general formula (I) used depends on the requirements imposed on the aqueous suspension.
  • the alkyltrialkoxysilane is used in an amount of 0.005 to 5.0% by weight, based on the dry weight of the hydraulic binder, in the aqueous suspension.
  • the alkyltrialkoxysilane of the general formula (I) in an amount of 0.01 to 2.0 wt .-%, particularly preferably in an amount of 0.01 to 1, 0 wt .-%, based on the dry weight of the hydraulic Binder used.
  • the alkyltrialkoxysilane of the general formula (I) can be carried out prior to the addition of the other components, simultaneously with one or more other components, or after the addition of the other components.
  • the entire amount of alkyltrialkoxysilane can be added all at once or in portions.
  • the amount of hydraulic binder used in the aqueous suspension, as well as the ratio of water to hydraulic binder, are critically dependent on the requirements imposed on the aqueous suspension and on the cured solid which forms therefrom.
  • the type and quantity of these components that are to be used for a specific application are specified, for example, in numerous DIN EN standards.
  • the DIN EN 998-2 standard in particular specifies the type and quantity of the components to be used in each case for special applications.
  • the content of hydraulic binder is between 100 and 600 kg / m 3
  • the content of aggregate between 1000 and 3000 kg / m 3
  • the water content between 50 and 600 kg / m 3 , based on one m 3 of aqueous suspension.
  • the ratio of water to hydraulic binder is 0.3 to 0.6.
  • a further subject of the present invention is an aqueous suspension comprising as dispersant an alkyltrialkoxysilane of the general formula (I) as defined above, an aggregate and a hydraulic binder.
  • the present invention also provides a process for preparing an alkyltrialkoxysilane of the general formula (I) as defined above, comprising the steps:
  • the present invention also provides an alkyltrialkoxysilane of the general formula (I) as defined above.
  • the mixture was heated with stirring to 65 ° C (oil bath temperature). Now a further 21, 7 g of Breox CA 1 10 ME were added in portions over 20 minutes by means of a syringe. The mixture was then stirred for 2 h at 65 ° C, then increased to 90 ° C. In this case, acetone was expelled under a stream of nitrogen. Residual acetone and silane were removed at a vacuum of about 100 mbar at 65 ° C. The product was analyzed by 1 H-NMR (CDCl 3). On the basis of the ratios of integrals of the signals of the starting product (double bond) and the sum of starting material and product (methylene group), a conversion of 62% was calculated.
  • Example 2 Spread test of substance from Example 1 in standard mortar A mortar of 450 g of Heidelberg cement CEM I, 42.5 R, 1350 g of standard sand and 225 g (less the water to be added with the condenser) was prepared according to DIN EN 196 1 . The flow agent was added together with 7 wt .-% defoamer Degressal ® SD 40 of BASF SE based on the dry mass of the flow agent added after 90 seconds during the mortar preparation. After the addition, it was mixed for 60 seconds. The mortar was then filled into a conical metal mold placed on a scaled shock table, scraping off excess mortar at the top and lifting the mold so that a conical mortar cake remained on the spread table.
  • the diameter of the cake was determined at intervals of 90 °.
  • the measurement was repeated with the same mortar immediately after application and after 30, 60, 90, 120 and 150 minutes. Before each further measurement was once stirred by means of a spoon by hand. The temperature was 23 +/- 1 ° C.
  • the condenser according to the invention thus increases the time in which processing (pumping, installation, distribution) of mortar or concrete is possible.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne l'utilisation de poly(oxyalkylène)oxy- aminoalkyltrialcoxysilanes ou de poly(oxyalkylen)aminoalkyl -trialcoxysilanes de formule générale (I), où les symboles et indices de la formule (I) ont les significations suivantes : -X- est -0- ou -N(R4)2-a- ; -Y- est -CH2- ; -z- est -0-(CH2)d-C(R5)2-c- ; a est 1, où -X- = -0-, et 1 ou 2, où -X- = -N(R4)2-a- ; b est 0 ou 1 ; c est 0, 1 ou 2 ; d est 0 ou 1 ; m est choisi indépendamment parmi les nombres entiers de 1 à 6 ; P est un nombre de 7 à 200 ; les R1 sont identiques ou différents et sont choisis dans le groupe comprenant les groupes méthyle, éthyle, n-propyle, iso-propyle, n-butyle, iso-butyle, sec-butyle, tert-butyle et phényle ; R2 est H ou un groupe méthyle ; R3, R4, R5 sont respectivement identiques ou différents et sont choisis indépendamment dans le groupe comprenant H et un groupe alkyle en C1 à C6 linéaire ou ramifié ; les R6 sont identiques ou différents et sont choisis indépendamment dans le groupe comprenant H, un groupe méthyle et éthyle ; et R7 est choisi dans le groupe comprenant H, un groupe alkyle en C1 à C6 linéaire ou ramifié, alcanoyle en C1à C10 linéaire ou ramifié et aryloyle en C6 à C10 ; comme agents dispersants pour des suspensions aqueuses en granulats et liants hydrauliques et les suspensions aqueuses elles-mêmes. L'invention concerne également un procédé de production d'alkyltrialcoxysilanes et les alkyltrialcoxysilanes eux-mêmes.
EP14777340.2A 2013-10-02 2014-09-30 Utilisation de poly(oxyalkylène)oxy-aminoalkyltrialcoxysilanes ou de poly(oxyalkylène) aminoalkyltrialcoxysilanes comme agents dispersants Withdrawn EP3052452A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14777340.2A EP3052452A1 (fr) 2013-10-02 2014-09-30 Utilisation de poly(oxyalkylène)oxy-aminoalkyltrialcoxysilanes ou de poly(oxyalkylène) aminoalkyltrialcoxysilanes comme agents dispersants

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13187182 2013-10-02
EP14777340.2A EP3052452A1 (fr) 2013-10-02 2014-09-30 Utilisation de poly(oxyalkylène)oxy-aminoalkyltrialcoxysilanes ou de poly(oxyalkylène) aminoalkyltrialcoxysilanes comme agents dispersants
PCT/EP2014/070912 WO2015049227A1 (fr) 2013-10-02 2014-09-30 Utilisation de poly(oxyalkylène)oxy-aminoalkyltrialcoxysilanes ou de poly(oxyalkylène) aminoalkyltrialcoxysilanes comme agents dispersants

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EP3052452A1 true EP3052452A1 (fr) 2016-08-10

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US (1) US20160297928A1 (fr)
EP (1) EP3052452A1 (fr)
KR (1) KR20160065850A (fr)
CN (1) CN105612134A (fr)
WO (1) WO2015049227A1 (fr)

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