NO171308B - APPLICATION OF COPOLYMERS AS ADDITIVE FOR CEMENT MORTAL MIXTURES, CEMENT MORTAL MIXTURES, AND COPOLYMER DISPERSION - Google Patents
APPLICATION OF COPOLYMERS AS ADDITIVE FOR CEMENT MORTAL MIXTURES, CEMENT MORTAL MIXTURES, AND COPOLYMER DISPERSION Download PDFInfo
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- NO171308B NO171308B NO893344A NO893344A NO171308B NO 171308 B NO171308 B NO 171308B NO 893344 A NO893344 A NO 893344A NO 893344 A NO893344 A NO 893344A NO 171308 B NO171308 B NO 171308B
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- Prior art keywords
- copolymer
- methyl
- weight
- mixtures
- hydrogen
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Links
- 229920001577 copolymer Polymers 0.000 title claims description 29
- 239000000203 mixture Substances 0.000 title claims description 13
- 239000006185 dispersion Substances 0.000 title claims description 11
- 239000000654 additive Substances 0.000 title claims description 7
- 230000000996 additive effect Effects 0.000 title claims description 6
- 239000004568 cement Substances 0.000 title description 4
- 230000001459 mortal effect Effects 0.000 title 2
- 239000000178 monomer Substances 0.000 claims description 21
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 16
- 239000011083 cement mortar Substances 0.000 claims description 15
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 11
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 10
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000004209 (C1-C8) alkyl group Chemical group 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 150000002148 esters Chemical class 0.000 description 6
- 239000004816 latex Substances 0.000 description 6
- 229920000126 latex Polymers 0.000 description 6
- 239000013535 sea water Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000004815 dispersion polymer Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000004159 Potassium persulphate Substances 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 3
- 235000019394 potassium persulphate Nutrition 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- ZBJVLWIYKOAYQH-UHFFFAOYSA-N naphthalen-2-yl 2-hydroxybenzoate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=C(C=CC=C2)C2=C1 ZBJVLWIYKOAYQH-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000011433 polymer cement mortar Substances 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 239000004296 sodium metabisulphite Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/483—Polyacrylates
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
Description
Sementmørtelblandinger har vært anvendt for fremstilling av konstruksjonsmaterialer i mer enn 150 år. Slike blandinger er normalt meget tilfredsstillende, men for visse formål er de beheftet med mangler som det er ønskelig å gjøre noe med. En slik mangel er at konstruksjonselementer fremstilt av sement-mørtelblandinger er utsatt for korrosjon i sjøvann. Det har vært gjort forsøk på å redusere denne korrosjon på en rekke måter, og bl.a. har man lenge arbeidet med tilsetning av polymerer for å redusere korrosjonen som forårsakes særlig av kloret i sjøvann. En annen egenskap som det også har vært funnet ønskelig å forbedre, er sementmørtelblandingens smidighet, f.eks. slik at den flyter godt ut ved støpning av gulv. Cement mortar mixes have been used for the production of construction materials for more than 150 years. Such mixtures are normally very satisfactory, but for certain purposes they are fraught with defects which it is desirable to do something about. One such shortcoming is that construction elements made from cement-mortar mixtures are exposed to corrosion in seawater. Attempts have been made to reduce this corrosion in a number of ways, including has long worked with the addition of polymers to reduce the corrosion caused in particular by the chlorine in seawater. Another property that has also been found desirable to improve is the flexibility of the cement mortar mixture, e.g. so that it flows out well when pouring floors.
Vanlig anvendte polymerer som betongtilsetning er i stor utstrekning basert på styren-butadien eller vinylacetat, selv om også andre er forsøkt. Commonly used polymers as concrete additives are largely based on styrene-butadiene or vinyl acetate, although others have also been tried.
I JP patentansøkning 52014634 anvendes kopolymerer som inneholder 20-25 vekt% metakrylsyre. Dette er så mye syre at dispersjonene av kopolymerene er fullstendig oppløselige i kautisk alkali. Produktene anvendes ved en pH på 7-10 i form av oppløsninger som bindemidler for forskjellige materialer, og sement er angitt som et eksempel på slike materialer. Den store syremengde medfører at kopolymerene ifølge nevnte ansøkning har helt andre egenskaper enn de som ønskes ifølge foreliggende oppfinnelse. In JP patent application 52014634, copolymers containing 20-25% by weight of methacrylic acid are used. This is so much acid that the dispersions of the copolymers are completely soluble in caustic alkali. The products are used at a pH of 7-10 in the form of solutions as binders for various materials, and cement is given as an example of such materials. The large amount of acid means that the copolymers according to said application have completely different properties than those desired according to the present invention.
I SU patentansøkning 332063 er det tale om tilsetning av en dispersjon av en kopolymer av metylmetakrylat, butylakrylat og metakrylsyre, til en sementmørtel. Det er ikke nevnt hvor mye metakrylsyre polymeren inneholder, og dette er en helt vital opplysning. I mangel av slike opplysninger vil det være nærliggende å anta at lateksen bare inneholder de "normale" mengder av metakrylsyre, dvs. under ca. 2 %. SU patent application 332063 deals with the addition of a dispersion of a copolymer of methyl methacrylate, butyl acrylate and methacrylic acid to a cement mortar. It is not mentioned how much methacrylic acid the polymer contains, and this is absolutely vital information. In the absence of such information, it would be reasonable to assume that the latex only contains the "normal" amounts of methacrylic acid, i.e. below approx. 2%.
I henhold til oppfinnelsen anvendes en kopolymer av monomerer valgt fra de med formlene hvor R er hydrogen eller metyl According to the invention, a copolymer of monomers selected from those with the formulas where R is hydrogen or methyl is used
hvor R<1> er hydrogen eller metyl, og where R<1> is hydrogen or methyl, and
R<2> er Cj.8 alkyl R<2> is C1-8 alkyl
hvor mengden av én eller to forskjellige A-enheter i kopolymeren er totalt 6-10 vekt% og resten er hovedsakelig én eller flere forskjellige B-enheter, og eventuelt 10 vekt% av en annen etylen-umettet monomer, som tilsetningsmiddel for sementmørtelblandinger for å oppnå en sterkt forbedret motstandsevne mot korrosjon på grunn av sjøvann. Kopolymeren anvendes hensiktsmessig i form av en vandig dispersjon, og foruten å sette den til sementmørtelblandingen, kan man også påføre den på den herdede eller delvis herdede betong. En sementmørtelblanding som inneholder en kopolymer som angitt ovenfor, representerer et ytterligere trekk ved oppfinnelsen. where the amount of one or two different A units in the copolymer is a total of 6-10% by weight and the remainder is mainly one or more different B units, and optionally 10% by weight of another ethylenically unsaturated monomer, as an additive for cement mortar mixtures to achieve a greatly improved resistance to corrosion due to seawater. The copolymer is suitably used in the form of an aqueous dispersion, and in addition to adding it to the cement mortar mixture, it can also be applied to the hardened or partially hardened concrete. A cement mortar composition containing a copolymer as indicated above represents a further feature of the invention.
Monomer A omfatter akrylsyre og metakrylsyre, og det er mulig å anvende begge disse i samme kopolymer. Monomer B omfatter forskjellige estere av akrylsyre og metakrylsyre, og det er likeledes mulig å anvende flere forskjellige estere i samme kopolymer. Monomer A comprises acrylic acid and methacrylic acid, and it is possible to use both of these in the same copolymer. Monomer B comprises different esters of acrylic acid and methacrylic acid, and it is likewise possible to use several different esters in the same copolymer.
Særlig egnede ester-monomerer B er de hvor R<1> er hydrogen eller metyl, og R<2> er metyl eller n-butyl. Particularly suitable ester monomers B are those where R<1> is hydrogen or methyl, and R<2> is methyl or n-butyl.
En særlig egnet syre-monomer A er metakrylsyre, mens særlig egnede ester-monomerer B er butylakrylat og metylmetakrylat. A particularly suitable acid monomer A is methacrylic acid, while particularly suitable ester monomers B are butyl acrylate and methyl methacrylate.
Særlig egnede kopolymerer er de hvor mengden av A-monomer, særlig metakrylsyre, er 6-8 vekt%, og resten av kopolymeren er hovedsakelig B-monomerer. B-monomerene er fortrinnsvis butylakrylat og metyImetakrylat i forholdet 50:50-70:30, særlig 65:35, basert på vekt. Particularly suitable copolymers are those in which the amount of A monomer, in particular methacrylic acid, is 6-8% by weight, and the rest of the copolymer is mainly B monomers. The B monomers are preferably butyl acrylate and methyl methacrylate in a ratio of 50:50-70:30, especially 65:35, based on weight.
Generelt er forholdet at jo mer hydrofobe ester-monomerene er, desto mer syre-monomer bør være til stede i kopolymeren. Normalt vil man tilsvarende kunne anvende noe mindre akrylsyre enn metakrylsyre for å få den samme virkning. In general, the ratio is that the more hydrophobic the ester monomers, the more acid monomer should be present in the copolymer. Normally, you will be able to use somewhat less acrylic acid than methacrylic acid to achieve the same effect.
Foruten monomerene A og B kan den anvendte kopolymer også inneholde mindre mengder, nemlig inntil 10 vekt%, av andre etylen-umettede monomerer, så som styren. Besides the monomers A and B, the copolymer used can also contain smaller amounts, namely up to 10% by weight, of other ethylenically unsaturated monomers, such as styrene.
Ifølge oppfinnelsen tilveiebringes også en kopolymer-dispersjon hvor kopolymeren er sammensatt av 6-8 vektprosent metakrylsyre og resten butylakrylat og metylmetakrylat i vektforholdet 50:50 - 70:30, særlig ca. 65:35. According to the invention, a copolymer dispersion is also provided where the copolymer is composed of 6-8 weight percent methacrylic acid and the rest butyl acrylate and methyl methacrylate in the weight ratio 50:50 - 70:30, especially approx. 65:35.
Polymerdispersjonen som anvendes som tilsetningsmiddel til sementmørtel eller som påføres på helt eller delvis herdet betong, har hensiktsmessig et faststoff-innhold på 10-60 vekt%, særlig 30-60 vekt%. Med mye vann i dispersjonen kan eventuelt vannmengden i sementmørtelen reduseres tilsvarende. Den mengde polymerdispersjon som settes til en sementmørtel er hensiktsmessig fra 2 til 25 vekt%, regnet på tørr basis, særlig fra 5 til 15 vekt%. The polymer dispersion which is used as an additive to cement mortar or which is applied to fully or partially hardened concrete, suitably has a solids content of 10-60% by weight, in particular 30-60% by weight. With a lot of water in the dispersion, the amount of water in the cement mortar can be reduced accordingly. The amount of polymer dispersion added to a cement mortar is suitably from 2 to 25% by weight, calculated on a dry basis, in particular from 5 to 15% by weight.
Den klorid-inntrengning/korrosjon som finner sted i betong i sjøvann, er særlig alvorlig fordi den efterfølges av en korrosjon av armeringsjernet når klorid-ionene trenger inn til dette. Korrosjonen av armeringsjernet ledsages av ekspansjon og påfølgende brudd i betongen. For å illustrere den forbedring som oppnås ved anvendelsen i henhold til oppfinnelsen sammenlignet med anvendelse av andre polymerer, er det foretatt en forsert undersøkelse av klorid-inntrengning i betong. The chloride penetration/corrosion that takes place in concrete in seawater is particularly serious because it is followed by corrosion of the rebar when the chloride ions penetrate it. The corrosion of the rebar is accompanied by expansion and subsequent fracture of the concrete. In order to illustrate the improvement achieved by the use according to the invention compared to the use of other polymers, a forced investigation of chloride penetration into concrete has been carried out.
Undersøkelsen ble foretatt som følger: The survey was carried out as follows:
Armeringsjern ble innstøpt i en betongsylinder som ble nedsenket i sjøvann med det frie armeringsjern over vannflaten. Dette armeringsjern ble benyttet som anode, og som katode ble benyttet en metallelektrode nedsenket i sjøvannet. Spenningen var 5 volt likestrøm. Resultatene av disse forsøk er gitt i det følgende som antall dager før strømstigning. Forsøkene ble foretatt med to forskjellige mørtler med forskjellig forhold vann/sement. Den anvendte polymerdispersjon inneholdt 50 vekt% polymer. Den angitte dose er på tørr basis. Rebar was embedded in a concrete cylinder which was submerged in seawater with the free rebar above the water surface. This rebar was used as the anode, and a metal electrode submerged in the seawater was used as the cathode. The voltage was 5 volts direct current. The results of these tests are given below as the number of days before the current increase. The tests were carried out with two different mortars with different water/cement ratios. The polymer dispersion used contained 50% by weight of polymer. The stated dose is on a dry basis.
Polymerdispersjonene var som følger: The polymer dispersions were as follows:
Polymer 1 = Kommersiell lateks basert på terpolymeren Polymer 1 = Commercial latex based on the terpolymer
vinylacetat/vinylklorid/etylen vinyl acetate/vinyl chloride/ethylene
Polymer 2 = Kommersiell lateks basert på kopolymeren Polymer 2 = Commercial latex based on the copolymer
vinylacetat/"Versatic"-ester vinyl acetate/"Versatic" ester
Polymer 3 = Kommersiell lateks basert på styren/butadien-gummi Polymer 3 = Commercial latex based on styrene/butadiene rubber
Polymer 4 = 50% (vekt/vekt) lateks av kopolymer med Polymer 4 = 50% (w/w) latex of copolymer with
7% metakrylsyre, 60,5% butylakrylat og 32,5% metyImetakrylat ifølge oppfinnelsen 7% methacrylic acid, 60.5% butyl acrylate and 32.5% methyl methacrylate according to the invention
Det vil av resultatene sees at Polymer 4 som anvendes i henhold til oppfinnelsen medførte en betydelig større motstandsevne mot kloridinntrengning enn de vanlig anvendte latekser. It will be seen from the results that Polymer 4 used according to the invention resulted in a significantly greater resistance to chloride penetration than the commonly used latexes.
En polymerdispersjon for anvendelse i henhold til oppfinnelsen ble fremstilt som følger: 2 g natriummetabisulfitt ble oppvarmet i 4,9 1 vann mot 80°C i en reaktor. Til vannet i reaktoren ble det satt en løsning av 12,5 g kaliumpersulfat (initiator) i 125 ml vann ved 70°C. A polymer dispersion for use according to the invention was prepared as follows: 2 g of sodium metabisulphite was heated in 4.9 l of water to 80°C in a reactor. A solution of 12.5 g of potassium persulphate (initiator) in 125 ml of water at 70°C was added to the water in the reactor.
En preemulsjon ble fremstilt av 6,4 1 vann, 350 g "Berol 295" (emulgeringsmiddel), 840 g "DISPONIL AES 60" A preemulsion was prepared from 6.4 l water, 350 g "Berol 295" (emulsifier), 840 g "DISPONIL AES 60"
(emulgeringsmiddel), 7569 g butylakrylat, 4075 g metylmetakrylat og 856 g metakrylsyre. 10% av denne preemulsjonen ble derefter satt til den vandige løsning i reaktoren ved en temperatur på 75°C. Da denne første porsjon hadde reagert, ble resten av preemulsjonen tilsatt over et tidsrom på 2 timer, mens temperaturen i reaktoren ble holdt konstant på 80 ± 2°C. Samtidig med tilsetning av preemulsjonen begynte man tilsetning av en løsning av 12,5 g kaliumpersulfat i 900 ml vann, som ble tilsatt over 3 timer. Reaktorens innhold ble holdt på 80°C i enda 1 time efter avsluttet tilsetning av kaliumpersulfat-løsningen og ble derefter nedkjølt. 50 g "FOAM-MASTER ENA 224" ble tilsatt som skumdemper ved 65°C. Efter endelig avkjøling til romtemperatur fikk man en 50 vekt% dispersjon av polymer med (emulsifier), 7569 g butyl acrylate, 4075 g methyl methacrylate and 856 g methacrylic acid. 10% of this preemulsion was then added to the aqueous solution in the reactor at a temperature of 75°C. When this first portion had reacted, the rest of the preemulsion was added over a period of 2 hours, while the temperature in the reactor was kept constant at 80 ± 2°C. Simultaneously with the addition of the preemulsion, the addition of a solution of 12.5 g of potassium persulphate in 900 ml of water began, which was added over 3 hours. The contents of the reactor were kept at 80°C for a further 1 hour after the addition of the potassium persulphate solution was finished and were then cooled. 50 g of "FOAM-MASTER ENA 224" was added as foam suppressant at 65°C. After final cooling to room temperature, a 50% by weight dispersion of polymer was obtained
partikkelstørrelse 100-200 nm. particle size 100-200 nm.
Denne dispersjon er velegnet som tilsetningsmiddel for sementmørtelblandinger eller for påføring på herdet betong for å redusere klorinntrengning. Likeledes er den egnet som tilsetningsmiddel for sementmørtelblandinger for å øke blandingenes bearbeidbarhet. This dispersion is suitable as an additive for cement mortar mixtures or for application to hardened concrete to reduce chlorine penetration. Likewise, it is suitable as an additive for cement mortar mixtures to increase the workability of the mixtures.
Reologiske egenskaper Rheological properties
De reologiske egenskaper er uttrykk for bl.a. bearbeidbarhet og smidighet. Nedenstående tabell III viser resultatene med en polymer-tilsetning ifølge oppfinnelsen og med en vanlig sementmørtel og en polymer-sement mørtel basert på en kommersiell styren-butadien lateks (SBR) som referanser. The rheological properties are an expression of i.a. workability and flexibility. Table III below shows the results with a polymer addition according to the invention and with a normal cement mortar and a polymer cement mortar based on a commercial styrene-butadiene latex (SBR) as references.
Polymeren som ble anvendt ifølge oppfinnelsen inneholdt butylakrylat (BA) og metylmetakrylat (MMA) i nærmere angitte vektforhold, med og uten metakrylsyre (MAA) (uttrykt som vekt% av total polymer). The polymer used according to the invention contained butyl acrylate (BA) and methyl methacrylate (MMA) in specified weight ratios, with and without methacrylic acid (MAA) (expressed as % by weight of total polymer).
bedre er flyt. better is flow.
Det vil sees at det beste resultat ble her oppnådd med en polymer inneholdende BA/MMA i forholdet 50:50 og 7% MAA, alt på vektbasis. It will be seen that the best result was achieved here with a polymer containing BA/MMA in the ratio 50:50 and 7% MAA, all on a weight basis.
Claims (8)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO893344A NO171308C (en) | 1989-08-21 | 1989-08-21 | APPLICATION OF COPOLYMERS AS ADDITIVE FOR CEMENT MORTAL MIXTURES, CEMENT MORTAL MIXTURES, AND COPOLYMER DISPERSION |
| PCT/NO1990/000131 WO1991002703A1 (en) | 1989-08-21 | 1990-08-17 | Use of copolymers as additives for cement mortar mixtures or for coating of cured or partially cured concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO893344A NO171308C (en) | 1989-08-21 | 1989-08-21 | APPLICATION OF COPOLYMERS AS ADDITIVE FOR CEMENT MORTAL MIXTURES, CEMENT MORTAL MIXTURES, AND COPOLYMER DISPERSION |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| NO893344D0 NO893344D0 (en) | 1989-08-21 |
| NO893344L NO893344L (en) | 1991-02-22 |
| NO171308B true NO171308B (en) | 1992-11-16 |
| NO171308C NO171308C (en) | 1993-02-24 |
Family
ID=19892333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO893344A NO171308C (en) | 1989-08-21 | 1989-08-21 | APPLICATION OF COPOLYMERS AS ADDITIVE FOR CEMENT MORTAL MIXTURES, CEMENT MORTAL MIXTURES, AND COPOLYMER DISPERSION |
Country Status (2)
| Country | Link |
|---|---|
| NO (1) | NO171308C (en) |
| WO (1) | WO1991002703A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6006836A (en) * | 1997-08-18 | 1999-12-28 | Halliburton Energy Services, Inc. | Methods of sealing plugs in well bores |
| US5873413A (en) * | 1997-08-18 | 1999-02-23 | Halliburton Energy Services, Inc. | Methods of modifying subterranean strata properties |
| US6124246A (en) * | 1997-11-17 | 2000-09-26 | Halliburton Energy Services, Inc. | High temperature epoxy resin compositions, additives and methods |
| JP4155616B2 (en) * | 1998-01-20 | 2008-09-24 | 株式会社日本触媒 | Cement admixture, cement composition using the same, and preparation method thereof |
| US6006835A (en) * | 1998-02-17 | 1999-12-28 | Halliburton Energy Services, Inc. | Methods for sealing subterranean zones using foamed resin |
| US6012524A (en) * | 1998-04-14 | 2000-01-11 | Halliburton Energy Services, Inc. | Remedial well bore sealing methods and compositions |
| US6068055A (en) | 1998-06-30 | 2000-05-30 | Halliburton Energy Services, Inc. | Well sealing compositions and methods |
| US6059035A (en) * | 1998-07-20 | 2000-05-09 | Halliburton Energy Services, Inc. | Subterranean zone sealing methods and compositions |
| US6098711A (en) * | 1998-08-18 | 2000-08-08 | Halliburton Energy Services, Inc. | Compositions and methods for sealing pipe in well bores |
| US6244344B1 (en) | 1999-02-09 | 2001-06-12 | Halliburton Energy Services, Inc. | Methods and compositions for cementing pipe strings in well bores |
| US6234251B1 (en) | 1999-02-22 | 2001-05-22 | Halliburton Energy Services, Inc. | Resilient well cement compositions and methods |
| US6454006B1 (en) | 2000-03-28 | 2002-09-24 | Halliburton Energy Services, Inc. | Methods and associated apparatus for drilling and completing a wellbore junction |
| FR2836141B1 (en) * | 2002-02-18 | 2004-08-27 | Atofina | EXTRUDABLE HYDRAULIC BINDER COMPOSITION |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2531895C2 (en) * | 1975-07-17 | 1984-07-26 | Hoechst Ag, 6230 Frankfurt | Use of aqueous plastic dispersions for impregnating and priming absorbent substrates |
| EP0006279B1 (en) * | 1978-02-22 | 1982-01-27 | Imperial Chemical Industries Plc | Cementitious composition, a method to prepare it and shaped article derived therefrom |
| EP0069586B1 (en) * | 1981-07-07 | 1986-04-02 | Marley Tile AG | Polymer-modified cement mortars and concretes and processes for the production thereof |
| SE439918C (en) * | 1983-11-03 | 1991-11-20 | Polyrand Ab | CEMENT USE AND / OR CONCRETE AND PROCEDURE FOR PREPARING USE AND / OR CONCRETE |
-
1989
- 1989-08-21 NO NO893344A patent/NO171308C/en unknown
-
1990
- 1990-08-17 WO PCT/NO1990/000131 patent/WO1991002703A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1991002703A1 (en) | 1991-03-07 |
| NO171308C (en) | 1993-02-24 |
| NO893344L (en) | 1991-02-22 |
| NO893344D0 (en) | 1989-08-21 |
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