摘要:
Die Erfindung betrifft ein sich als Fließmittel für hydraulische Bindemittel einsetzbares Copolymer aufweisend 30 bis 47 Mol-% einer (Meth-)Allylalkoholpolyetherderivat-Struktureinheit und 53 bis 70 Mol-% einer Maleinsäurederivat-Struktureinheit.
摘要翻译:要求具有(甲基)烯丙醇聚醚衍生物结构单元(30-47摩尔%)(I)和马来酸衍生物 - 结构单元(53-70摩尔%)(II))的共聚物。 具有式( - (CH 2 -C(H)(CH 2 -O-(AO)a H)) - )(Ia)的(甲基)烯丙基醇聚醚衍生物结构单元(30-47mol%)(I) )和/或( - (CH 2 -C(CH 3)(CH 2 -O-(AO)a H)) - )(Ib)和马来酸衍生物结构单元(53-70摩尔%)(II )(IIa)和/或( - (CH((C = O)-QR 3)) - C(R 2)((C = O)-OH)) - )(IIb)。 A:式C x H 2 x的亚烷基; a:11-39,优选16-28; X:NH-(C n H 2 n)或O-(C n H 2 n); n:1-4; R 1> R 2>:H或1-4C烷基; Z,Q:O或NH; R 3>:H,(C n H 2 n)-SO 3 H,(C n H 2 n)-OH,(C n H 2 n)-PO 3H 2,(C n H 2 n)-OPO 3H 2,(C 6H 4)-SO 3 H,(C 6 H 4)-PO 3 H 2,(C 6 H 4)-OPO 3 H 2或(C m H 2 m)eO-(Al a O)b R 4> m,n,e:0-4; A1a:C x H 2 xor -CH 2C(C 6 H 5)H-; x:2-5,优选2; b:1-350; 和R 4>:1-4C烷基。 包括用于通过自由基溶液聚合制备共聚物的独立权利要求,其中使用水作为溶剂,得到含水的水溶液(30-95(优选45-65)重量%)和共聚物干质量(5 -70(优选35-55)重量%)。 [图片]。
摘要:
Die Erfindung betrifft ein sich als Fließmittel für hydraulische Bindemittel eignendes Copolymer aufweisend 5 bis 55 Mol-% einer Isoprenolpolyetherderivat-Struktureinheit, 2 bis 90 Mol-% einer Acrylsäurederivat-Struktureinheit und 2 bis 90 Mol-% einer Hydroxyalkylacrylat-Struktureinheit.
摘要翻译:具有异戊二烯聚醚衍生物结构单元(5-55mol%)(Ia),丙烯酸衍生物结构单元(2-90mol%)(II)和丙烯酸羟烷基酯结构单元(2)的共聚物(I) -90摩尔%)(III)。 具有式( - (CH 2 -C(CH 3)((C 2 H 4)-O-(AO)a H))的异戊二烯聚醚衍生物 - 结构单元(5-55mol%)的共聚物(I)) - (II),式(Ia),式( - (CH 2 -C(H)((C = O)-XR 1))的丙烯酸衍生物结构单元(2-90mol% 和(或)( - (CH 2 -C(H)((C = O)-R 2)) - )(IIb)和丙烯酸羟烷基酯结构单元(2-90% (CH 2 -C(H)((C = O)-OR 3)) - )(III)。 A:式(C x H 2 x)的亚烷基; x:2-5,优选2; a:5-45; X:NH-(C n H 2 n)或O-(C n H 2 n); n:1-4; R 1> SO 3 H,PO 3 H 2,OPO 3 H 2或C 6 H 5 SO 4; R 2> OH,OM或ONH 4; M:Na,K或Ca; 和R 3> 1-5C单羟基烷基。 在氧化还原引发剂存在下,在0-40℃下通过自由基溶液聚合制备(I)独立的权利要求,其中使用水作为溶剂。
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Copolymers in kontinuierlicher Betriebsweise in einer Polymerisationseinrichtung, enthaltend einen Zuführungsleitungen sowie einen Abfluss aufweisenden Polymerisationsreaktor, wobei durch die Zuführungsleitungen radikalischer Polymerisationsinitiator sowie Säuremonomer und Polyethermakromonomer als monomere Ausgangsstoffe in den Polymerisationsreaktor eingeleitet werden, in dem Polymerisationsreaktor auf -20 bis +120 °C temperierte Initiator, monomere Ausgangsstoffe, sowie Copolymer enthaltende Reaktionskomposition vorliegt, Copolymer enthaltende Reaktionskomposition durch den Abfluss aus dem Polymerisationsreaktor ausgeleitet wird, wobei die Einleitung des Polyethermakromonomers in den Polymerisationsreaktor in der Weise getrennt von der des Säuremonomers erfolgt, dass das Polyethermakromonomer in dem Polymerisationsreaktor mit der Initiator, monomere Ausgangsstoffe sowie Copolymer enthaltenden Reaktionskomposition vermischt wird und dabei erstmals mit dem Säuremonomer in Kontakt gerät.
摘要:
The invention relates to a dispersion which is free of binders and which contains silica and at least one flow agent, the silica being a precipitated silica having a surface area greater than 50 m²/g, the aggregates and/or agglomerates in the dispersion having an average diameter of less than 1 µm and the content of silica being 5 to 50% by weight, based on the total amount in the dispersion. The invention also relates to a method for producing the same and to its use as a concrete admixture in cementitous preparations.
摘要:
A cement composition utilizing said agent offers improved shrinkage compensation, solution: A gas-forming agent for a cement composition containing nitrite comprises a substance which produces nitrogen gas through a reaction in the cement composition.
摘要:
The invention relates to copolymers based on phosphorous-containing monomers (A) and on macromonomers (B), to methods for the production thereof and to their use as additives for inorganic binding agent suspensions based on cement, lime, gypsum and anhydrite. The corresponding polymeric additives have, as flow agents, excellent water-reducing properties and hold the flowability of the concrete over a relatively long period of time (60 to 90 min.) to an almost unchanged level without having delayed action. In addition, the corresponding polymeric additives improve the processing and setting processes of the building materials produced with these additives by making possible earlier and higher resistances to pressure.
摘要:
Water-soluble copolymers containing sulpho groups are described, as are processes for their preparation and their use as stabilizers, rheology modifiers and water-retaining agents in aqueous building material systems based on hydraulic binders, such as cement, lime, gypsum and anhydride, and in water-based paint and coating systems. The inventive additives impart to the building material system excellent performance properties in processing and in the cured or dried state.
摘要:
Additives with applications in construction chemistry comprise an organic and/or an inorganic core component (A) with rheology-enhancing properties and a shell component (B) applied to the same by virtue of physical and/or chemical interactions, which acts as a coating. Component (A) should consist of water-soluble and/or swellable and/or adsorbing compounds of a non-cellulosic type which, in the end application, develop viscosity-enhancing properties. The shell component (B) should preferably be a film-forming polymer which can release component (A) in a retarded manner during its application in construction chemistry, for example polyvinyl alcohol, polyvinyl acetate and polyethyleneglycol. Component (B) can comprise multiple layers and include at least one reactive layer. The new additive can be used as an auxiliary agent with a retarded effect in paints, but also for timing the increase in viscosity or the development of rheological properties of construction material systems based on inorganic binders.
摘要:
The invention relates to amphiphilic polymer compounds that are produced in such a manner that: a) a di-, tri- or tetraglycidyl compound (A) is reacted with an optionally unsaturated reactive constituent (B), comprised of a C8-C28 fatty acid, a C8-C28 alcohol or of a C8-C28 secondary amine, afterwards; b) the reaction product from step a) is permitted to react with an aliphatic or aromatic polyisocyanate compound (C), and finally; c) the reaction product from step b) is reacted with a polyalkene oxide compound (D) of general formula (I), in which R1 = H, a linear or branched and optionally unsaturated aliphatic hydrocarbon radical with 1 to 12 C atoms, R2 = a linear or branched and optionally unsaturated aliphatic hydrocarbon radical with 1 to 30 C atoms or represents phenyl, m = 0 to 250, n = 3 to 350, and x = 1 to 12, and the ethylene oxide, i.e. higher alkene oxide units, can be distributed in any manner in the polyalkene oxide compound (D). The inventive polymer compounds are excellently suited for use as agents for preventing or suppressing bloomings on surfaces of hardened, hydraulically settable building material compounds and/or for imparting water repellency to the corresponding hydraulically settable systems. In addition, the corresponding products absorb distinctly less water due to the inventive additive whereby enabling a distinct reduction in frost damages and in a rapid rusting of reinforcing steel.
摘要:
Beschleuniger für Spritzbeton oder Spritzmörtel, der als wässrige Dispersion vorliegt, die 25 bis 40 Gew.-% Aluminiumsulfat und mindestens eine weitere Aluminiumverbindung enthält, so dass das molare Verhältnis von Aluminium zu Sulfat in der Dispersion 1,35 bis 0,70 beträgt, wobei die wässrige Dispersion einen anorganischen Stabilisator aufweist, der ein Magnesiumsilikat umfasst.