Neutral clay deactivator

Abstract

The present invention relates to a construction material composition comprising at least one nonionic copolymer and the use of said construction material composition. Furthermore, the present invention relates to a nonionic copolymer and its use for improving the robustness against clay variations.

Description

Technical Field

[0001] The present invention relates to a construction material composition containing at least one nonionic copolymer and the use of the construction material composition. Further, the present invention relates to its use for improving the robustness against variations in nonionic copolymers and clays.

Background Art

[0002] Construction material compositions contain inorganic binders such as cement or gypsum.

[0003] Inorganic binders usually contain impurities such as clay. Such clay impurities may reduce the fluidity of the construction material composition containing the inorganic binder because the fluidizing agent tends to show a high adsorption affinity for the clay. Clay has a high surface area and / or high porosity. Since the fluidizing agent shows a high affinity for the clay, the fluidizing agent may not be fully available in the construction material composition. Therefore, this may have an adverse effect on the workability of the construction material composition. Further, due to insufficient workability, it may also have an adverse effect on the construction material composition after curing.

[0004] European Patent Application Publication No. 1984309 and European Patent No. 2649106 describe that this adverse effect can be reduced by using a cationic clay blocking agent (also known as a clay blocker). The clay blocking agent has a higher affinity for clay than for the high fluidizing agent. Therefore, it is possible to suppress a decrease in the amount of the fluidizing agent available for the dispersion of the inorganic binder. However, its addition efficiency is not sufficient. Further, the cationic clay blocking agent has chloride ions as counterions, and there are also construction material compositions for which this is not desirable.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of such a background, the object of the present invention was to provide a construction material composition free of chlorides. In particular, the object of the present application was to provide a construction material composition while ensuring good workability and to improve the robustness against the incorporation of clay. Furthermore, the object of the present invention was to provide an improved clay inactivator.

Means for Solving the Problems

[0006] Surprisingly, these objects are achieved by a construction material composition comprising: A) the following monomer components: i) a monomer component A comprising an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) a monomer component B comprising an ethylenically unsaturated monomer containing at least one polyether moiety and at least one nonionic copolymer comprising residues based thereon; B) at least one inorganic binder based on calcium sulfate It has been found that this can be achieved by a construction material composition.

[0007] Furthermore, at least one of these objects is a construction material composition comprising: A) the following monomer components: i) a monomer component A comprising an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) a monomer component B comprising an ethylenically unsaturated monomer containing at least one polyether moiety and at least one nonionic copolymer comprising residues based thereon, wherein at least one polyether moiety of monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n-W (a) (as defined in the claims) and a nonionic copolymer comprising; B) at least one inorganic binder selected from a hydraulic binder or a latent hydraulic binder It has also been found that it can be achieved by a construction material composition comprising

[0008] Surprisingly, when the nonionic copolymer defined herein is used in a construction material composition, the robustness against clay variations is improved. In this context, the robustness against clay variations should be understood as the workability being improved such that the decrease in the fluidity of the construction material composition is smaller than when the nonionic copolymer is not used.

[0009] Accordingly, in a first aspect, the present invention is a construction material composition comprising A) the following monomer components: i) a monomer component A comprising an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) a monomer component B comprising an ethylenically unsaturated monomer containing at least one polyether moiety at least one nonionic copolymer comprising residues based on; B) at least one inorganic binder based on calcium sulfate relates to a construction material composition comprising

[0010] Hereinafter, preferred embodiments of the components of the construction material composition will be described in more detail. It should be understood that each preferred embodiment is suitable alone and in combination with other preferred embodiments.

[0011] In a preferred embodiment A1 of the first aspect, at least one polyether moiety of monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n-W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C1-C8 alkylene, X is O, N or NR 1 and k is 0 or 1, n is an integer having an average value of 24 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen. In addition to nitrogen atoms and carbon atoms, 1, 2 or 3 additional heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members. The nitrogen ring members may be bonded to the R 2 moiety, and 1 or 2 carbon ring members may be present as carbonyl, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl) is included.

[0012] In a second aspect, the present invention is a construction material composition comprising A) the following monomer components: i) a monomer component A comprising an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) a monomer component B comprising an ethylenically unsaturated monomer containing at least one polyether moiety at least one nonionic copolymer based on a residue containing a residue, wherein at least one polyether moiety of monomer component B has the structural unit (a) *-U-(C(O)) k-X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C2-C8 alkylene, X is O, N or NR 1 and k is 0 or 1, n is an integer having an average value of 24 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk in (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen. In addition to nitrogen atoms and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members. The nitrogen ring members may be bonded to the R 2 moiety, and 1 or 2 carbon ring members may be present as carbonyl, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl, (provided that when U is a chemical bond, k is 0) a nonionic copolymer containing; B) at least one inorganic binder selected from a hydraulic binder or a latent hydraulic binder relates to a construction material composition containing.

[0013] In one embodiment B1 of the first and second aspects, the monomer component A is selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 1-vinyl-2-pyrrolidinone, N-vinylcaprolactam, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 1-vinylimidazole, 4-vinylpyridine and 1-vinyl-1,2,4-triazole, and is preferably N,N-dimethylacrylamide.

[0014] In one embodiment B2 of the first and second aspects, the nonionic copolymer has the formula (1)

Chemical formula

Chemical formula

[0015] In one embodiment B3 of the first and second aspects, the construction material composition C) a fluidizing agent and further contains, preferably, the fluidizing agent is a water-soluble comb polymer present as a copolymer containing a side chain having an ether functional group and an acid functional group on the main chain, or a composition containing a polycondensate and this polycondensate (I) At least one structural unit composed of an aromatic or heteroaromatic moiety having a polyether side chain, preferably a polyalkylene glycol side chain, more preferably a polyethylene glycol side chain, and (II) At least one structural unit composed of an aromatic or heteroaromatic moiety having at least one phosphate ester group and / or a salt thereof is contained.

[0016] In a third aspect, the present invention is a nonionic copolymer comprising the following monomer components: i) Monomer component A selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 4-vinylpyridine, and 1-vinyl-1,2,4-triazole, preferably N,N-dimethylacrylamide; ii) Structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein, * represents a bonding site to the polymer, U is a chemical bond or C2-C8 alkylene, X is O, N or NR 1 and k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members are R 2 may be bonded to the moiety, and 1 or 2 carbon ring members may be present as carbonyls, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl, provided that when U is a chemical bond, k is 0) a monomer component B comprising an ethylenically unsaturated monomer comprising at least one polyether moiety containing; and (iii) optionally, formula (1)

Chemical formula

[0017] In one embodiment C1 of the third aspect, (i) the monomer component A is N,N-dimethylacrylamide; (ii) at least one polyether moiety of the monomer component B is the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C2 alkylene, X is O, k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2 - C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H or methyl, provided that when U is a chemical bond, k is 0) comprising; iii) Optionally, the monomer component C is of formula (1)

Chemical formula

Chemical formula

[0018] In a fourth aspect, the present invention relates to a construction material composition comprising at least one nonionic copolymer according to the third aspect and at least one inorganic binder, preferably, the at least one inorganic binder is a hydraulic binder, a latent hydraulic binder or an inorganic binder based on calcium sulfate.

[0019] In an embodiment D1 of the first, second, and fourth aspects, the construction material includes at least one additional inorganic binder selected from the group consisting of hydraulic binders, latent hydraulic binders, calcium sulfate-based inorganic binders, and mixtures thereof.

[0020] In an embodiment D2 of the first, second, and fourth aspects, a hydraulic binder is included, and the hydraulic binder is preferably selected from the group consisting of Portland cement, calcium aluminate cement, sulfoaluminate cement, and mixtures thereof, and / or a latent hydraulic binder is included, and the latent hydraulic binder is preferably blast furnace slag.

[0021] In an embodiment D3 of the first, second, and fourth aspects, a calcium sulfate-based inorganic binder is included, the inorganic binder is in its anhydrous or hydrated form, and is preferably calcined gypsum.

[0022] In the fifth aspect, the present invention is a nonionic copolymer having the following monomer components: i) A monomer component A containing an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety; ii) A structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein, * represents a bonding site to the polymer, U is a chemical bond or C1-C8 alkylene, X is O, N, or NR 1 and k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted by phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members may be bonded to the R 2 moiety, and 1 or 2 carbon ring members may be present as carbonyls, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl) a monomer component B comprising an ethylenically unsaturated monomer containing at least one polyether moiety containing iii) optionally, a monomer component C having the formula (1)

Chemical formula

[0023] In a sixth aspect, the present invention relates to the use of the nonionic copolymer according to the third aspect for improving the robustness against variations in clay in a construction material composition, preferably without delaying the setting time of the construction material composition, or for pretreating a composition containing the nonionic copolymer before adding an inorganic binder.

[0024] In a seventh aspect, the present invention relates to the use of the construction material composition according to the first, second and fourth aspects for dry mortar mixtures or concrete construction applications, preferably for the production of flat sheets, self-leveling underlayments or overlays, screeds, repair mortars, grouts, plasters, tile adhesives.

Embodiments for Carrying Out the Invention

[0025] Before explaining exemplary embodiments of the present invention in detail, important definitions for understanding the present invention are presented.

[0026] As used in this specification and the appended claims, the singular forms "a" and "an" include their respective plural forms as well, unless the context clearly dictates otherwise. In the context of the present invention, the terms "about" and "approximately" refer to a range of accuracy that a person skilled in the art would recognize as still ensuring the technical effect of the characteristic in question. This term typically refers to a deviation of ±20%, preferably ±15%, more preferably ±10%, and even more preferably ±5% from the indicated numerical value. The term "comprising" is to be understood as being non-limiting. The term "consisting of" in the context of the present invention is considered a preferred embodiment of "comprising". In the following, if a group is defined as including at least a certain number of embodiments, this preferably also means that the group consisting only of these embodiments is included. Further, the terms "first", "second", "third" or "(a)", "(b)", "(c)", "(d)", etc. in this specification and the claims are used to distinguish similar components and are not necessarily described in a consecutive order or chronological order. Thus, the terms used in this way are understood to be interchangeable in appropriate circumstances, and the embodiments described in this specification can be implemented in an order other than the order described or illustrated in this specification. When the terms "first", "second", "third" or "(a)", "(b)", "(c)", "(d)", "i", "ii", etc. relate to steps of a method or use or assay, there is no consistency in time or time interval between these steps. That is, these steps can be carried out simultaneously as described above or below in this specification, unless otherwise specified in this application, or there can be a time interval in seconds, minutes, hours, days, months, weeks or even years between such steps. Although specific methodologies, procedures, reagents, etc. are described in this specification, since these can vary, it should be understood that the present invention is not limited thereto.The terms used in this specification are used only for the purpose of describing specific embodiments and are not intended to limit the scope of the present invention. It should also be understood that the scope of the present invention is limited only by the appended claims. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art.

[0027] As used herein, the term "substituted" means that a hydrogen atom bonded to a specified atom is replaced by a specifically recited substituent under the condition that a stable or chemically feasible compound is obtained as a result of the substitution. Unless otherwise specified, a substituted atom can have one or more substituents, and each substituent is independently selected.

[0028] When referring to a particular atom or moiety substituted with "one or more" substituents, the term "one or more" is intended to include at least one substituent, e.g., 1 to 10 substituents, preferably 1, 2, 3, 4 or 5 substituents, more preferably 1, 2 or 3 substituents, and most preferably 1 or 2 substituents. When neither the term "unsubstituted" nor the term "substituted" is explicitly stated with respect to a moiety, the moiety should be considered unsubstituted.

[0029] The organic moieties described in the definitions of the above variable elements are, like the term halogen, a general term for a list of the individual members of that group. The prefix C n ~C m indicates, in each case, the possible number of carbon atoms in the group.

[0030] The term "halogen" refers, in each case, to fluorine, bromine, chlorine or iodine, particularly to fluorine, chlorine or bromine.

[0031] The term "halide" refers, in each case, to fluoride, bromide, chloride or iodide, particularly to fluoride, bromide or chloride.

[0032] As used herein, the term "alkyl" in each case generally refers to a straight-chain or branched alkyl group having 1 to 10 carbon atoms, preferably 1 to 8 carbon atoms. Examples of alkyl groups are methyl, ethyl, n-propyl, isopropyl, n-butyl, 2-butyl, isobutyl, tert-butyl, n-pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 1-ethylpropyl, 1,1-dimethylpropyl and 1,2-dimethylpropyl. Methyl, ethyl, n-propyl, isopropyl and isobutyl are particularly preferred.

[0033] As used herein, the term "alkylene" generally refers to a straight-chain or branched alkylene group which is a linking group having 1 to 10 carbon atoms, for example 1, 2, 3 or 4 carbon atoms. The alkylene group bridges from a particular group of the molecule to the remainder. Preferred alkylene groups include methylene (CH2), ethylene (CH2CH2), propylene (CH2CH2CH2), etc. Those skilled in the art will understand that, for example, when referring to CH2 where the carbon atom is tetravalent, two valences are left to form a bridge (-CH2-). Similarly, for example, when referring to CH2CH2, one valence is left on each carbon atom to form (-CH2CH2-). Further, for example, when referring to CH2CH2CH2, one valence is left on each terminal carbon atom to form a bridge (-CH2CH2CH2-).

[0034] As used herein, "(C n ~C m alkyl)" in each case represents a linker moiety, and the moiety attached thereto is attached to the terminal carbon, and n is an integer selected from 1, 2, 3, 4, 5, 6, 7 or 8, preferably an integer selected from 1, 2, 3 or 4.

[0035] The term "C(=O)" as used therein represents a carbonyl moiety in each case.

[0036] The term "aryl" or "aromatic carbocyclic ring" preferably includes a 6-membered aromatic carbocyclic ring based on carbon atoms as ring members. A preferred example is phenyl. Unless otherwise specified, the term "aryl" further includes a "bicyclic aromatic carbocyclic ring".

[0037] The "bicyclic aromatic carbocyclic ring" generally includes a 6- to 14-membered, preferably 7- to 12-membered or 8- to 10-membered, more preferably 9- or 10-membered bicyclic ring containing 6 to 14, preferably 7 to 12 or 8 to 10, more preferably 9 or 10 carbon atoms. In the bicyclic aromatic carbocyclic ring, the Hückel (4n + 2) rule holds. Preferably, the term "aromatic" related to the bicyclic carbocyclic ring means that both rings of the bicyclic moiety are aromatic, and thus, for example, in the case of a 10-membered bicyclic aromatic carbocyclic ring, 8 π electrons are present. A preferred example is naphthalene.

[0038] As used herein, the term "polyether moiety" in each case refers to a group of a polymer whose repeating unit contains a carbon-oxygen bond. The polyether moiety can be derived, for example, from an aldehyde or an epoxide.

[0039] The terms "heterocyclic" or "heterocyclic ring" generally include a monocyclic ring having 3 to 10 members, preferably 4 to 8 members or 5 to 7 members, more preferably 5 or 6 members, particularly 6 members, unless otherwise specified. The heterocyclic ring can be saturated, partially or fully unsaturated or aromatic, where saturated means that only single bonds are present, partially or fully unsaturated means that one or more double bonds can be present at appropriate positions but the Hückel's rule for aromaticity does not hold, while aromatic means that the Hückel's (4n + 2) rule holds. The heterocyclic ring typically contains one or more, for example 1, 2, 3 or 4, preferably 1, 2 or 3 heteroatoms selected from N, O and S as ring members, where the S atom as a ring member can exist as S, SO or SO2. The remaining ring members are carbon atoms. In one embodiment, the heterocyclic ring is an aromatic heterocyclic ring containing one or more, for example 1, 2, 3 or 4, preferably 1, 2 or 3 heteroatoms selected from N, O and S as ring members, preferably a 5- or 6-membered aromatic heterocyclic ring, where the S atom as a ring member can exist as S, SO or SO2. Examples of aromatic heterocyclic rings related to the definition of "heteroaryl" are shown below. "Heteroaryl" or "heteroaril" is included in the term "heterocyclic ring". Saturated or partially or fully unsaturated heterocyclic rings usually contain 1, 2, 3, 4 or 5, preferably 1, 2 or 3 heteroatoms selected from N, O and S as ring members, where the S atom as a ring member can exist as S, SO or SO2. In a preferred embodiment, the heterocyclic ring is a 4- to 6-membered saturated heterocyclic ring containing one or more, for example 1, 2, 3 or 4, preferably 1, 2 or 3 heteroatoms selected from N, O and S as ring members, where the S atom as a ring member can exist as S, SO or SO2. Those skilled in the art recognize that S, SO or SO2 are as follows.

Chem.

[0040] Furthermore, those skilled in the art recognize that resonance structures can be possible in the oxidized form.

[0041] Preferred saturated heterocycles include pyrrolidine, piperidine or morpholine.

[0042] The terms "heteroaryl", or "heteroaromatic", or "aromatic heterocycle", or "aromatic heterocyclic ring", or "heteroaromatic" include monocyclic 5- or 6-membered aromatic heterocycles containing 1, 2, 3 or 4 heteroatoms selected from N, O and S as ring members, where the S atom as a ring member can exist as S, SO or SO2. Examples of 5- or 6-membered aromatic heterocycles include pyridyl (also referred to as pyridinyl), i.e., 2-, 3- or 4-pyridyl, pyrimidinyl, i.e., 2, 4- or 5-pyrimidinyl, pyrazinyl, pyridazinyl, i.e., 3- or 4-pyridazinyl, thienyl, i.e., 2- or 3-thienyl, furyl, i.e., 2- or 3-furyl, pyrrolyl, i.e., 2- or 3-pyrrolyl, oxazolyl, i.e., 2-, 3- or 5-oxazolyl, isoxazolyl, i.e., 3-, 4- or 5-isoxazolyl, thiazolyl, i.e., 2-, 3- or 5-thiazolyl, isothiazolyl, i.e., 3-, 4- or 5-isothiazolyl, pyrazolyl, i.e., 1-, 3-, 4- or 5-pyrazolyl, i.e., 1-, 2-, 4- or 5-imidazolyl, oxadiazolyl, for example 2- or 5-[1,3,4]oxadiazolyl, 4- or 5-(1,2,3-oxadiazole)yl, 3- or 5-(1,2,4-oxadiazole)yl, 2- or 5-(1,3,4-thiadiazole)yl, thiadiazolyl, for example 2- or 5-(1,3,4-thiadiazole)yl, 4- or 5-(1,2,3-thiadiazole)yl, 3- or 5-(1,2,4-thiadiazole)yl, triazolyl, for example 1H-, 2H- or 3H-1,2,3-triazol-4-yl, 2H-triazol-3-yl, 1H-, 2H- or 4H-1,2,4-triazolyl and tetrazolyl, i.e., 1H- or 2H-tetrazolyl.

[0043] As used herein, the term "nonionic copolymer" in each case means that the copolymer is not charged in the pH range of 3 to 12, preferably 5 to 9, more preferably 6 to 8, particularly 6.5 to 7.5. Therefore, the nonionic copolymer does not contain counterions such as chlorides.

[0044] As used herein, the term "clay blocking agent" or "clay blocker" refers to a substance that competes with a dispersant in binding to the surface of clay particles, overcomes the dispersant, thereby covering these clay particles to prevent the dispersant from approaching, or substantially soft-aggregates the clay particles.

[0045] The nonionic copolymer which is the subject matter may have a weight average of the present invention and may have a weight-average molecular weight within the range of 500 to 150,000 g / mol. The preferred range is 10,000 to 120,000 g / mol, particularly 30,000 to 100,000 g / mol.

[0046] Preferred embodiments of the construction material composition, nonionic copolymer and their use according to the present invention will be described in detail below. It should be understood that the preferred embodiments of the present invention are preferred either alone or in combination with each other.

[0047] As shown above, in one embodiment, the present invention is a construction material composition comprising A) the following monomer components: i) a monomer component A containing an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) a monomer component B containing an ethylenically unsaturated monomer containing at least one polyether moiety at least one nonionic copolymer containing a residue based on; B) at least one inorganic binder based on calcium sulfate and relates to a construction material composition containing.

[0048] In one embodiment of the present invention, at least one polyether moiety of the monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C1-C8 alkylene, X is O, N or NR 1 wherein k is 0 or 1, n is an integer having an average value of 24 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen atoms and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members are R 2 portion may be bonded, and 1 or 2 carbon ring members may be present as carbonyls, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl) is included.

[0049] In a preferred embodiment, at least one calcium sulfate-based inorganic binder is selected from calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrite and mixtures thereof. In other preferred embodiments, the inorganic binder is a calcium sulfate-based binder in anhydrous form.

[0050] In a preferred embodiment of the present invention, the weight ratio of monomer component B to monomer component A is from 37 / 63 to 98 / 2, preferably from 39 / 61 to 97 / 3, more preferably from 45 / 55 to 96 / 4, and particularly from 48 / 52 to 95 / 5.

[0051] In still another preferred embodiment of the present invention, the molar ratio of monomer component B to monomer component A is from 1 / 200 to 1, preferably from 1 / 100 to 1 / 1.2, more preferably from 1 / 50 to 1 / 1.5, still more preferably from 1 / 20 to 1 / 2, even more preferably from 1 / 17 to 1 / 2.5, and particularly from 1 / 12 to 1 / 3.

[0052] As shown above, in other embodiments, the present invention is a construction material composition comprising A) the following monomer components: i) a monomer component A containing an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) a monomer component B containing an ethylenically unsaturated monomer containing at least one polyether moiety and at least one nonionic copolymer containing a residue based thereon, wherein at least one polyether moiety of monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C2-C8 alkylene, X is O, N or NR 1 and k is 0 or 1, n is an integer having an average value of 24 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted by phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen atoms and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members are R 2 portion may be bonded, and 1 or 2 carbon ring members may be present as carbonyl, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl, provided that when U is a chemical bond, k is 0) and a nonionic copolymer containing; B) at least one inorganic binder selected from a hydraulic binder or a latent hydraulic binder and further relates to a construction material composition containing.

[0053] According to one embodiment of the present invention, the ethylenically unsaturated monomer containing at least one polyether moiety contained in the monomer component B can further contain at least one C1-C6 alkyl moiety, preferably at least one methyl.

[0054] Hereinafter, the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) will be described in more detail for the preferred embodiments.

[0055] In one embodiment, U is a chemical bond or C2-C6 alkylene, preferably a chemical bond or C2-C4 alkylene. In a preferred embodiment, U is a chemical bond, C2 alkylene or C4 alkylene. It should be understood that U related to C2 alkylene is represented by the following structural moiety "-CH2-CH2-".

[0056] In one embodiment, W is H, methyl or C2-C6 alkyl.

[0057] In one embodiment, n is an integer having an average value of 20 to 280, preferably 24 to 250, particularly 24 to 150, based on the entire polymer.

[0058] In a preferred embodiment, at least one polyether of monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents the bonding site to the polymer, U is a chemical bond, C2 alkylene or C4 alkylene, X is O, k is 0 or 1, n is an integer having an average value of 24 to 300 based on the entire polymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H or methyl) and includes.

[0059] In a preferred embodiment, at least one polyether of monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents the bonding site to the polymer, U is a chemical bond, X is O, k is 0, n is an integer having an average value of 24 to 300 based on the entire polymer, Alk is C2 and C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H) and includes.

[0060] In a preferred embodiment, at least one Alk in the (AlkO) group of structural unit (a) is C4 alkylene. n At least one Alk in the group is C4 alkylene.

[0061] In this regard, particularly preferably, structural unit (a) is structural unit (a*) *-U-X-(CH2-CH2-CH2-CH2-O)-(AlkO) n -W (a*) (wherein, * represents a bonding site to the polymer, U is a chemical bond, X is O, n is an integer having an average value of 24 to 300 based on the entire polymer, Alk is C2 alkylene, W is H) represented by.

[0062] In another preferred embodiment, at least one polyether of monomer component B is structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein, * represents a bonding site to the polymer, U is C2 alkylene, X is O, k is 0, n is an integer having an average value of 24 to 300 based on the entire polymer, Alk is C2 alkylene, W is H) including.

[0063] In one embodiment of the present invention, monomer component A is an alkylamide moiety. The term alkylamide moiety should be understood to include monoalkylamides such as methylamide and dialkylamides such as N,N-dimethylacrylamide.

[0064] In another embodiment of the present invention, the monomer component A is a nitrogen-containing heterocyclic moiety. According to the present invention, exemplary nitrogen-containing heterocyclic moieties include 1-vinyl-2-pyrrolidinone, 1-vinylimidazole, 1-vinyl-1,2,4-triazole, 4-vinylpyridine, N-vinylcaprolactam, and 1-vinylimidazole by way of example.

[0065] In one embodiment of the present invention, the monomer component A is selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 1-vinyl-2-pyrrolidinone, N-vinylcaprolactam, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 1-vinylimidazole, 4-vinylpyridine, and 1-vinyl-1,2,4-triazole. Preferably, the monomer component A is N,N-dimethylacrylamide.

[0066] In a preferred embodiment of the present invention, the weight ratio of monomer component B to monomer component A is from 37 / 63 to 98 / 2, preferably from 39 / 61 to 97 / 3, more preferably from 45 / 55 to 96 / 4, and particularly from 48 / 52 to 95 / 5.

[0067] In yet another preferred embodiment of the present invention, the molar ratio of monomer component B to monomer component A is from 1 / 200 to 1, preferably from 1 / 100 to 1 / 1.2, more preferably from 1 / 50 to 1 / 1.5, still more preferably from 1 / 20 to 1 / 2, even more preferably from 1 / 17 to 1 / 2.5, and particularly from 1 / 12 to 1 / 3.

[0068] In one embodiment of the present invention, the nonionic copolymer has the formula (1)

Chemical formula

[0069] Preferably, monomer component C has the formula (1)

Chemical formula

[0070] In one embodiment of the present invention, monomer component C has the formula (1a), (1b), (1c) or (1d)

Chemical formula

[0071] In a particular embodiment of the present invention, monomer component C has the formula (1a) or (1b)

Chemical formula

[0072] In one embodiment of the present invention, the construction material composition further comprises C) a fluidizing agent.

[0073] Any fluidizing agent known in the art can be used. The terms "fluidizing agent" and "dispersant" can be used interchangeably.

[0074] In one embodiment, the fluidizing agent is a water-soluble comb polymer. In a preferred embodiment, the water-soluble comb polymer exists as a copolymer containing side chains having ether functional groups and acid functional groups on the main chain.

[0075] In one embodiment, the water-soluble comb polymer is in the form of a polymerization unit in the presence of an acid monomer, preferably a carboxylic acid monomer, and a polyether macromonomer, and at least 45 mol%, preferably at least 80 mol% of the total structural units of the copolymer are formed by incorporating the acid monomer, preferably the carboxylic acid monomer and the polyether macromonomer. It exists as a copolymer produced by radical polymerization. An acid monomer should be understood to mean a monomer that can be radically copolymerized, has at least one carbon double bond, contains at least one acid functional group, preferably a carboxylic acid functional group, and reacts as an acid in an aqueous medium. Further, an acid monomer should be understood to also mean a monomer that can be radically copolymerized, has at least one carbon double bond, forms at least one acid functional group, preferably a carboxylic acid functional group, as a result of a hydrolysis reaction in an aqueous medium, and reacts as an acid in an aqueous medium (e.g., a hydrolyzable ester of maleic anhydride or (meth)acrylic acid).

[0076] The polyether macromonomer related to the fluidizing agent is a compound that can be radically copolymerized, has at least one carbon double bond, and has at least two ether oxygen atoms, provided that the polyether macromonomer structural unit present in the copolymer has a side chain containing at least two ether oxygen atoms, preferably at least four ether oxygen atoms, more preferably at least eight ether oxygen atoms, and most preferably at least 15 ether oxygen atoms.

[0077] Structural units that do not constitute acid monomers or polyether macromonomers can be, for example, styrene and styrene derivatives (e.g., methyl-substituted derivatives), vinyl acetate, vinyl pyrrolidone, butadiene, vinyl propionate, unsaturated hydrocarbons such as ethylene, propylene and / or (iso)butylene, etc. This list is a non-exhaustive enumeration. Monomers having no more than one carbon double bond are preferred.

[0078] In a preferred embodiment, the water-soluble comb polymer is a copolymer of styrene with maleic acid and a half-ester of a monofunctional polyalkylene glycol. Preferably, this type of copolymer can be produced by polymerizing the monomers styrene and maleic anhydride (or maleic acid) in a first step. In a second step, the copolymer of styrene and maleic anhydride is reacted with a polyalkylene glycol, preferably an alkyl polyalkylene glycol (preferably alkyl polyethylene glycol, most preferably methyl polyethylene glycol), for the purpose of esterifying the acid groups. Styrene can be replaced in whole or in part by styrene derivatives, such as methyl-substituted derivatives. The copolymer of this preferred embodiment is described in U.S. Patent No. 5,158,996, the disclosure of which is incorporated herein by reference.

[0079] Often, the structural unit is produced by incorporating an acid monomer in the form of a polymerization unit into the copolymer, and this structural unit has the general formula (Ia), (Ib), (Ic) and / or (Id)

Chemical formula

Chemical formula

Chemical formula

Chemical formula

[0080] Typically, the structural unit is generated by incorporating a polyether macromonomer in the form of a polymerization unit into the copolymer, and this structural unit has the general formula (IIa), (IIb) and / or (IIc)

Chemical formula

Chemical formula

[0081] In a further embodiment, the structural unit is produced by incorporating a polyether macromonomer in the form of a polymerization unit into the copolymer, and the structural unit has the general formula (IId)

Chemical formula

[0082] Preferably, as the polyether macromonomer, alkoxylated isoprenol, and / or alkoxylated hydroxybutyl vinyl ether, and / or alkoxylated (meth)allyl alcohol, and / or vinylated methyl polyalkylene glycol are used, which in each case preferably have an arithmetic average of 4 to 340 oxyalkylene groups. Preferably, as the acid monomer, methacrylic acid, acrylic acid, maleic acid, maleic anhydride, a monoester of maleic acid or a mixture of a plurality of these components is used.

[0083] In one embodiment, the fluidizing agent is a composition containing a polycondensate, preferably an aqueous suspension of a curing accelerator, and this polycondensate is (I) at least one structural unit consisting of an aromatic or heteroaromatic moiety having a polyether side chain, preferably a polyalkylene glycol side chain, more preferably a polyethylene glycol side chain, and (II) at least one structural unit consisting of an aromatic or heteroaromatic moiety having at least one phosphate ester group and / or a salt thereof and contains.

[0084] Typically, the structural units (I) and (II) of the polycondensate are represented by the following general formulas:

Chemical formula

Chemical formula

[0085] Typically, the molar ratio of structural unit (I):(II) is 1:10 to 10:1, preferably 1:8 to 1:1.

[0086] In a further embodiment, the polycondensate has the following formula

Chemical formula

[0087] Typically, R of structural unit (III)5 and R 6 are, independently of one another, identical or different and are represented by H, COOH and / or methyl, preferably H.

[0088] Preferably, the molar ratio of the structural units [(I)+(II)]:(III) in the polycondensate is 1:0.8 to 3.

[0089] Preferably, the curing accelerator suspension contains a thickening polymer selected from polysaccharide derivatives and / or (co)polymers having an average molecular weight Mw of more than 500,000 g / mol, more preferably more than 1,000,000 g / mol, and this (co)polymer contains structural units derived from nonionic (meth)acrylamide monomer derivatives and / or sulfonic acid monomer derivatives (preferably by radical polymerization). Preferably, the thickening agent is used in an amount of 0.001 to 10% by weight, more preferably 0.001 to 1% by weight, based on the weight of the curing accelerator suspension. The thickening polymer should preferably be added such that the plastic viscosity of the curing accelerator suspension exceeds 80 mPa·s.

[0090] The preparation of the dispersant is described, for example, in European Patent No. 3153482.

[0091] More preferably, the dispersant is selected from the group of polycarboxylate ethers (PCE). The anionic groups of the PCE are carboxylic acid groups and / or carboxylate groups. The PCE is preferably obtained by radical copolymerization of a polyether macromonomer and a monomer containing an anionic and / or anionicogenic group. Preferably, at least 45 mol%, preferably at least 80 mol%, of all the structural units constituting the copolymer are structural units of the polyether macromonomer or the monomer containing an anionic and / or anionicogenic group.

[0092] Preferably, the fluidizing agent is present as a water-soluble comb polymer having a side chain having an ether functional group and an acid functional group on the main chain, or Composition containing a polycondensate which is such that the polycondensate (I) contains at least one structural unit consisting of an aromatic or heteroaromatic moiety having a polyether side chain, preferably a polyalkylene glycol side chain, more preferably a polyethylene glycol side chain, and (II) contains at least one structural unit consisting of an aromatic or heteroaromatic moiety having at least one phosphate ester group and / or a salt thereof .

[0093] As shown above, the present invention is a nonionic copolymer and comprises the following monomer components: i) Monomer component A selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 4-vinylpyridine and 1-vinyl-1,2,4-triazole, preferably N,N-dimethylacrylamide; ii) Structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents the bonding site to the polymer, U is a chemical bond or C2-C8 alkylene, X is O, N or NR 1 , k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk may be the same or different within the (AlkO) n group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members are R 2 may be bonded to the moiety, and 1 or 2 carbon ring members may be present as carbonyls, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl, (provided that when U is a chemical bond, k is 0)); a monomer component B comprising an ethylenically unsaturated monomer comprising at least one polyether moiety containing; and (iii) optionally, of formula (1)

Chemical formula

[0094] In one embodiment of the present invention, (i) the monomer component A is N,N-dimethylacrylamide; (ii) at least one polyether moiety of the monomer component B is a structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C2 alkylene, X is O, k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2 - C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H or methyl, provided that when U is a chemical bond, k is 0) comprising; and iii) Optionally, the monomer component C has the formula (1)

Chemical formula

Chemical formula

[0095] In one embodiment, the present invention relates to a construction material composition comprising at least one nonionic copolymer as defined herein and at least one inorganic binder.

[0096] In another preferred embodiment, ii) at least one polyether moiety of the monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C2-C8 alkylene, X is O, N or NR 1 and k is 0 or 1, n is an integer having an average value of 24 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen atoms and carbon atoms, 1, 2 or 3 additional heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members may be bonded to the R 2 moiety, and 1 or 2 carbon ring members may be present as carbonyl, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl, provided that when U is a chemical bond, k is 0) and includes.

[0097] In a preferred embodiment, k is 0.

[0098] In a further preferred embodiment, at least one polyether of monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond, X is O, k is 0, n is an integer having an average value of 24 to 300 based on the whole polymer, Alk is C2 and C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H) and includes.

[0099] In a preferred embodiment, at least one of the (AlkO) in the structural unit (a) n Alk in the group is C4 alkylene.

[0100] In this regard, particularly preferably, the structural unit (a) is the structural unit (a*) *-U-X-(CH2-CH2-CH2-CH2-O)-(AlkO) n -W (a*) (wherein, * represents the bonding site to the polymer, U is a chemical bond, X is O, n is an integer having an average value of 24 to 300 based on the whole polymer, Alk is C2 alkylene, W is H) and is represented by.

[0101] In another preferred embodiment, at least one polyether of the monomer component B is the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein, * represents the bonding site to the polymer, U is C2 alkylene, X is O, k is 0, n is an integer having an average value of 24 to 300 based on the whole polymer, Alk is C2 alkylene, W is H) and includes.

[0102] In a preferred embodiment of the present invention, the weight ratio of monomer component B to monomer component A is from 37 / 63 to 98 / 2, preferably from 39 / 61 to 97 / 3, more preferably from 45 / 55 to 96 / 4, and particularly from 48 / 52 to 95 / 5.

[0103] In yet another preferred embodiment of the present invention, the molar ratio of monomer component B to monomer component A is from 1 / 200 to 1, preferably from 1 / 100 to 1 / 1.2, more preferably from 1 / 50 to 1 / 1.5, still more preferably from 1 / 20 to 1 / 2, even more preferably from 1 / 17 to 1 / 2.5, and particularly from 1 / 12 to 1 / 3.

[0104] According to the present invention, the inorganic binder can be a hydraulic binder, a latent hydraulic binder, a calcium sulfate-based binder (calcium sulfate-based binder), or a mixture thereof.

[0105] In one embodiment, the present invention relates to a construction material composition comprising at least one nonionic copolymer as defined herein and at least one inorganic binder selected from the group consisting of a hydraulic binder, a latent hydraulic binder, or a calcium sulfate-based inorganic binder.

[0106] In one embodiment of the present invention, the construction material comprises at least one additional inorganic binder selected from the group consisting of a hydraulic binder, a latent hydraulic binder, a calcium sulfate-based inorganic binder, and mixtures thereof. In this regard, it should be understood that the construction material comprises at least two inorganic binders.

[0107] In a preferred embodiment, at least one inorganic binder is preferably a hydraulic binder selected from Portland cement, calcium aluminate cement, sulfoaluminate cement and mixtures thereof, and particularly preferably Portland cement. In certain preferred embodiments, the inorganic binder comprises less than 10% by weight, preferably less than 5% by weight, of aluminate cement. In certain particularly preferred embodiments, the construction material composition does not contain aluminate cement.

[0108] The mineral phases are indicated by their common names, followed by abbreviations according to the cement notation. The main compounds are represented according to the cement notation, according to the type of oxide, with CaO as C, SiO2 as S, Al2O3 as A, SO3 as $, and H2O as H. This notation is used throughout.

[0109] The term "Portland cement" refers to any cement compound containing Portland clinker, particularly CEM I, II, III, IV and V, in the sense of EN 197-1, paragraph 5.2. Preferred cements are ordinary Portland cements (OPC) as described in DIN EN 197-1, which may contain calcium sulfate (< 7% by weight) or be substantially free of calcium sulfate (< 1% by weight).

[0110] Calcium aluminate cement (also called high aluminate cement) means a cement containing a calcium aluminate phase. The term "aluminate phase" represents any mineral phase obtained from a combination of aluminate (of the chemical formula Al2O3 or "A" in the cement notation) and other mineral species. The amount of alumina (in the form of Al2O3) is 30% by weight or more of the total mass of the aluminate-containing cement when determined by fluorescent X-ray (XRF). More precisely, the mineral phase of the aluminate type comprises tricalcium aluminate (C3A), monocalcium aluminate (CA), mayenite (C 12 A7), tetracalcium ferroaluminate (C4AF) or some combination of these phases.

[0111] Sulfoaluminate cement has a content of more than 15% by weight of ye'elimite (the one with the chemical formula 4CaO·3Al2O3·SO3 or C4A3$ in cement notation).

[0112] In a preferred embodiment, the inorganic binder is a hydraulic binder selected from Portland cement, calcium aluminate cement, sulfoaluminate cement, and mixtures thereof. In another preferred embodiment, the inorganic binder includes a mixture of Portland cement and aluminate cement, or a mixture of Portland cement and sulfoaluminate cement, or Portland cement and a mixture of aluminate cement and sulfoaluminate cement.

[0113] In one embodiment, when the construction material composition contains aluminate-containing cement, this composition may further contain at least one sulfate source, preferably a calcium sulfate source. The calcium sulfate source may be selected from calcium sulfate dihydrate, anhydrite, α- and β-hemihydrates, i.e., α-bassanite and β-bassanite, or mixtures thereof. Preferably, the calcium sulfate is α-bassanite and / or β-bassanite. Generally, the calcium sulfate is contained in an amount of about 1% to about 20% by weight based on the weight of the aluminate-containing cement. In a further embodiment, the construction material composition further contains at least one alkali metal sulfate or aluminum sulfate such as potassium sulfate or sodium sulfate.

[0114] A construction material composition containing a hydraulic binder and having a weight percentage of sulfate based on the weight of the clinker of 4% to 14%, preferably 8% to 14%, most preferably 9% to 13% is preferred. It should be understood that the mass of the sulfate is the mass of the sulfate ion excluding the counter ion. Preferably, the sulfate is in the form of calcium sulfate, more preferably in the form of α-bassanite and / or β-bassanite.

[0115] The addition of sulfate to a hydraulic binder (cement) with a low sulfate content helps promote the formation of ettringite and results in better early strength development.

[0116] The construction material composition or building material formulation may also contain a latent hydraulic binder and / or a pozzolanic binder. The "latent hydraulic binder" in the context of the present invention is preferably an inorganic binder having a molar ratio of (CaO + MgO):SiO2 of 0.8 to 2.5, particularly 1.0 to 2.0. The calcium sulfate-based binder related to the present invention is also referred to as "gypsum". Generally, the above latent hydraulic binder can be selected from industrial and / or synthetic slag, particularly blast furnace slag, electric furnace phosphorus slag, steel slag, and mixtures thereof. The "pozzolanic binder" can generally be selected from amorphous silica, preferably precipitated silica, fumed silica and microsilica, ground glass, metakaolin, aluminosilicate, fly ash, preferably lignite fly ash and anthracite fly ash, natural pozzolan such as tuff, trass and volcanic ash, natural and synthetic zeolite, and mixtures thereof.

[0117] Slag can be industrial slag, i.e., waste from industrial processes or synthetic slag otherwise. Since industrial slag is not always available in a consistent quantity and quality, synthetic slag can be advantageous.

[0118] Blast furnace slag (BFS) is a waste of the glass furnace process. Other materials are granulated blast furnace slag (GBFS) and ground granulated blast furnace slag (GGBFS), which is finely ground granulated blast furnace slag. Ground granulated blast furnace slag has various fineness degrees and particle size distributions, which depend on the source and treatment method, and the fineness degree affects the reactivity. The Blaine value is used as a parameter for the fineness degree and is generally approximately 200 to 1000 m 2 ·kg -1 , preferably 300 to 600 m 2 ·kg -1 and has. Higher reactivity can be obtained by finer grinding.

[0119] However, in the context of the present invention, the expression "blast furnace slag" is intended to include materials obtained from any level of treatment, grinding and quality mentioned (i.e., BFS, GBFS and GGBFS). Blast furnace slag generally contains 30 - 45 wt% CaO, about 4 - 17 wt% MgO, about 30 - 45 wt% SiO2 and about 5 - 15 wt% Al2O3, typically about 40 wt% CaO, about 10 wt% MgO, about 35 wt% SiO2 and about 12 wt% Al2O3.

[0120] Electrically heated phosphorus slag is a waste from the production of electrically heated phosphorus. It is less reactive than blast furnace slag and contains, in addition to about 45 - 50 wt% CaO, about 0.5 - 3 wt% MgO, about 38 - 43 wt% SiO2, about 2 - 5 wt% Al2O3 and about 0.2 - 3 wt% Fe2O3, also fluorides and phosphates. Steel slag is a waste from various steelmaking processes having a very diverse composition.

[0121] In a preferred embodiment, the inorganic binder is a calcium sulfate-based binder selected from calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrite and mixtures thereof. In other preferred embodiments, the inorganic binder is a calcium sulfate-based binder in anhydrous form.

[0122] A particularly suitable latent hydraulic binder is blast furnace slag.

[0123] Latent hydraulic binders are generally included in an amount in the range of about 1 to about 30 wt% based on the weight of the aluminate-containing cement.

[0124] When the construction material composition contains a small amount (e.g., ≤ 10%) of a hydraulic binder, an alkali activator can be further added to promote the development of strength. The alkali activator is preferably used in an inorganic binder system, and such an alkali activator is, for example, an aqueous solution of an alkali metal fluoride, an alkali metal hydroxide, an alkali metal aluminate, or an alkali metal silicate, such as soluble water glass and mixtures thereof.

[0125] Generally, gypsum rock is sent to a manufacturing facility after being mined or quarried. The manufacturer receiving the quarried gypsum crushes large rock pieces and then performs further processing. The crushed rock is subsequently ground into a fine powder and heated to 120 - 160 °C in a process called "calcination" to drive out three - quarters of the chemically - bound water, thereby obtaining "calcined gypsum". Further, when gypsum is heated at a temperature slightly higher than 200 °C, anhydrite (CaSO4) is obtained. This sets and hardens very slowly when mixed with water. Calcined gypsum (hemihydrate or anhydrite) CaSO4·1 / 2H2O or CaSO4 is then used as the base for gypsum plaster, plaster of Paris, gypsum board, and other gypsum products. Various calcination treatments produce α - type and β - type hemihydrate gypsum. β - type calcium sulfate hemihydrate is produced by rapidly heating in an open - type apparatus to rapidly evaporate moisture, resulting in the formation of voids in the resulting anhydride. α - type hemihydrate is obtained by dehydrating gypsum in a sealed autoclave. Since the crystals formed at this time are dense, the resulting inorganic binder requires less water for rehydration compared to β - type hemihydrate.

[0126] Commercially available common natural gypsum sources often contain up to 20% or more of clay minerals and other impurities, reducing the amount of calcium sulfate accordingly.

[0127] Amorphous silica is preferably X-ray amorphous silica, i.e., silica that is found to have no crystallinity by powder diffraction methods. The content of SiO2 in the amorphous silica of the present invention is advantageously at least 80% by weight, preferably at least 90% by weight. Precipitated silica is obtained on an industrial scale by a precipitation process starting from water glass. Precipitated silica from some manufacturing processes is also called silica gel.

[0128] Fumed silica is produced by the reaction of chlorosilanes, such as silicon tetrachloride, in a hydrogen / oxygen flame. Fumed silica is an amorphous SiO2 powder with a particle size of 5 - 50 nm and a specific surface area of 50 - 600 m 2 ·g -1 .

[0129] Microsilica is a by-product of silicon production or ferrosilicon production and likewise consists mostly of amorphous SiO2 powder. The particles have a diameter of approximately 0.1 μm. The specific surface area is approximately 10 - 30 m 2 ·g -1 .

[0130] Fly ash is produced especially during the combustion of coal in power plants. Class C fly ash (lignite fly ash) contains approximately 10% by weight of CaO according to WO 08 / 012438 pamphlet, while class F fly ash (anthracite fly ash) contains less than 8% by weight, preferably less than 4% by weight, generally approximately 2% by weight of CaO.

[0131] Metakaolin is produced when kaolin is dehydrated. At 100 - 200 °C, kaolin releases physically bound water, while at 500 - 800 °C, dehydroxylation occurs, the lattice structure collapses, and metakaolin (Al2Si2O7) is formed. Thus, pure metakaolin contains approximately 54% by weight of SiO2 and approximately 46% by weight of Al2O3.

[0132] In the context of the present invention, aluminosilicates are the above-mentioned reactive compounds based on SiO2 in combination with Al2O3, which harden in an aqueous alkaline environment. Of course, it is not essential herein that silicon and aluminum be present in oxide form, as in the case of Al2Si2O7 for example. However, for the quantitative chemical analysis of aluminosilicates, it is common to express the proportions of silicon and aluminum in oxide form (i.e., as "SiO2" and "Al2O3").

[0133] Clay is the common name for many types of fine particulate earthy substances that exhibit plasticity when wetted with water, most of which are composed of phyllosilicate minerals containing varying amounts of water within their mineral structures. Many types of clay minerals are known. Some of the more common types include kaolinite, illite, chlorite, vermiculite, and smectite, also known as montmorillonite, the last two of which are notable for their ability to adsorb water.

[0134] Chemically, clay is usually a hydrous aluminum silicate containing alkali metals, alkaline earth metals and / or iron. Clay minerals consist of a combination of sheets of silicates linked together and a second sheet-like assembly of metal atoms, oxygen and hydroxyls, forming 1:1 type minerals such as kaolinite. Sometimes, the latter sheet-like structure is sandwiched between two silica sheets, forming 2:1 type minerals such as vermiculite. Structurally, clay minerals are composed of planar arrangements of cations (along with oxygen) that can assume tetrahedral or octahedral coordination, which are then arranged in layers. This is often expressed as 2:1 type when it contains units composed of two layers of tetrahedral sheets and one layer of octahedral sheets, and often expressed as 1:1 type when it contains units with alternating tetrahedral and octahedral sheets. In addition, some 2:1 type clay minerals have an interlayer site between consecutive 2:1 units, which can be occupied by interlayer cations (often hydrated). Clay minerals are classified by the layer structure type, and within the same layer structure type, they are grouped based on the charge x per structural formula (Guggenheim S. et al., Clays and Clay Minerals, 54(6), 761 - 772, 2006). The charge x per structural formula is the net negative charge per layer and is expressed as a positive number. Furthermore, they are subdivided into subgroups based on characteristics such as dioctahedral or trioctahedral, and finally, by mineral species based on chemical composition, for example, x ≈ 0: Pyrophyllite group, x ≈ 0.2 - 0.6: Smectite group, such as montmorillonite, nontronite, saponite or hectorite, x ≈ 0.6 - 0.9: Vermiculite group, x ≈ 1.8 - 2: Illite group, such as clintonite, anandite, kinositalite and are classified accordingly.

[0135] The construction material composition can be, for example, concrete, mortar, cement paste, grout or gypsum-containing slurry. The term "cement paste" refers to an inorganic binder composition mixed with water.

[0136] The terms "mortar" or "grout" refer to a cement paste to which fine granules, i.e., granules having a diameter of 150 μm to 5 mm (e.g., sand), and optionally very fine granules are added. The grout is a mixture with a sufficiently low viscosity for filling voids or gaps. The viscosity of the mortar is sufficiently high to support not only the self-weight of the mortar but also the weight of the masonry placed on the mortar. The term "concrete" refers to a mortar to which coarse granules, i.e., granules having a diameter greater than 5 mm, are added.

[0137] The aggregates in the present invention can be, for example, silica, quartz, sand, crushed marble, glass spheres, granite, limestone, sandstone, calcite, marble, serpentine, travertine, dolomite, feldspar, gneiss, alluvial sand, any other durable aggregate, and mixtures thereof. The aggregates are often referred to as fillers and do not function as inorganic binders in particular.

[0138] The scope and subject of interest of the present invention will be better understood based on the following examples, which are intended to illustrate specific embodiments of the present invention and are non-limiting.

[0139] In one embodiment, the present invention is a construction material as defined herein, comprising a hydraulic binder, the hydraulic binder preferably being selected from the group consisting of Portland cement, calcium aluminate cement, sulfoaluminate cement, and mixtures thereof, and / or a latent hydraulic binder, the latent hydraulic binder preferably being blast furnace slag, relating to a construction material.

[0140] In one embodiment D3 of the first, second, and fourth aspects, an inorganic binder based on calcium sulfate is included, the inorganic binder being in its anhydrous or hydrated form and preferably being calcined gypsum.

[0141] In other embodiments, the present invention is a nonionic copolymer having the following monomer components: i) A monomer component A comprising an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety; ii) A structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein, * represents a bonding site to the polymer, U is a chemical bond or C1-C8 alkylene, X is O, N or NR 1 wherein, k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen and carbon atoms, 1, 2 or 3 additional heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring member may be bonded to the R 2 moiety, and 1 or 2 carbon ring members may be present as carbonyl, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl) A monomer component B comprising an ethylenically unsaturated monomer containing at least one polyether moiety; and iii) Optionally, a compound of formula (1)

Chemical formula

[0142] In a preferred embodiment, when U is a chemical bond, k is 0.

[0143] In a further preferred embodiment, k is 0.

[0144] In a further preferred embodiment, at least one polyether of monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents the bonding site to the polymer, U is a chemical bond, X is O, k is 0, n is an integer having an average value of 24 to 300 based on the whole polymer, Alk is C2 and C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H) including.

[0145] In a preferred embodiment, at least one Alk in the (AlkO) n group of the structural unit (a) is C4 alkylene.

[0146] In this regard, the structural unit (a) is the structural unit (a*) *-U-X-(CH2-CH2-CH2-CH2-O)-(AlkO) n -W (a*) (wherein * represents a bonding site to the polymer, U is a chemical bond, X is O, n is an integer having an average value of 24 to 300 based on the whole polymer, Alk is C2 alkylene, W is H) is particularly preferably represented by.

[0147] In another preferred embodiment, at least one polyether of the monomer component B is the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein * represents a bonding site to the polymer, U is C2 alkylene, X is O, k is 0, n is an integer having an average value of 24 to 300 based on the whole polymer, Alk is C2 alkylene, W is H) and contains.

[0148] In one embodiment of the present invention, the monomer component A is an alkylamide moiety. The term alkylamide moiety is to be understood to include monoalkylamides such as methylamide and dialkylamides such as N,N-dimethylacrylamide.

[0149] In another embodiment of the present invention, the monomer component A is a nitrogen-containing heterocyclic moiety. According to the present invention, examples of exemplary nitrogen-containing heterocyclic moieties include 1-vinyl-2-pyrrolidinone, 1-vinylimidazole, 1-vinyl-1,2,4-triazole, 4-vinylpyridine, N-vinylcaprolactam, and 1-vinylimidazole, by way of example.

[0150] In one embodiment of the present invention, the monomer component A is selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 1-vinyl-2-pyrrolidinone, N-vinylcaprolactam, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 1-vinylimidazole, 4-vinylpyridine, and 1-vinyl-1,2,4-triazole, preferably from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 4-vinylpyridine, and 1-vinyl-1,2,4-triazole. In particular, the monomer component A is N,N-dimethylacrylamide.

[0151] In a preferred embodiment of the present invention, the weight ratio of monomer component B to monomer component A is from 37 / 63 to 98 / 2, preferably from 39 / 61 to 97 / 3, more preferably from 45 / 55 to 96 / 4, and particularly from 48 / 52 to 95 / 5.

[0152] In yet another preferred embodiment of the present invention, the molar ratio of monomer component B to monomer component A is from 1 / 200 to 1, preferably from 1 / 100 to 1 / 1.2, more preferably from 1 / 50 to 1 / 1.5, even more preferably from 1 / 20 to 1 / 2, still more preferably from 1 / 17 to 1 / 2.5, and particularly from 1 / 12 to 1 / 3.

[0153] In other embodiments, the present invention relates to the use of the nonionic copolymer defined herein in a construction material composition, preferably for improving the robustness against clay variations without delaying the setting time of the construction material composition. In yet other embodiments, the present invention relates to the use of the nonionic copolymer defined herein in a pretreatment of a composition containing the nonionic copolymer in a construction material composition before adding an inorganic binder. It should be understood that no fluidizing agent is present in such a pretreatment.

[0154] In one embodiment, the present invention relates to the use of the construction material composition defined herein for the production of dry mortar mixtures or concrete construction applications, preferably for flat sheets, self-leveling underlayments or overlays, screeds, repair mortars, grouts, plasters, tile adhesives.

[0155] Further embodiments of the present application relate to the following.

[0156] 1. A nonionic copolymer comprising the following monomer components: i) a monomer component A containing an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety; ii) a structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein, * represents a bonding site to the polymer, U is a chemical bond or C2-C8 alkylene, X is O, N or NR 1 and k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H, C1-C6 alkyl, aryl or Y-F, Y is a linear or branched C2-C8 alkylene which may be further substituted by phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members are R 2 portion may be bonded, and 1 or 2 carbon ring members may be present as carbonyls, R 1 is H, C1-C4 alkyl or benzyl, and R 2 is H, C1-C4 alkyl or benzyl, provided that when U is a chemical bond, k is 0) A monomer component B containing an ethylenically unsaturated monomer containing at least one polyether moiety containing; and iii) Optionally, the formula (1)

Chemical formula

[0157] 2. (i) The monomer component A is selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 1-vinyl-2-pyrrolidinone, N-vinylcaprolactam, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 1-vinylimidazole, 4-vinylpyridine and 1-vinyl-1,2,4-triazole, and is preferably N,N-dimethylacrylamide; (ii) At least one polyether moiety of the monomer component B has the structural unit (a) *-U-(C(O)) k -X-(AlkO) n -W (a) (wherein, * represents a bonding site to the polymer, U is a chemical bond or C2 alkylene, X is O, k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C2-C4 alkylene, and Alk is (AlkO) n may be the same or different within the group, W is H or methyl, provided that when U is a chemical bond, k is 0) and; and (iii) Optionally, the monomer component C has the formula (1)

Chemical formula

[0158] 3. A construction material composition comprising at least one nonionic copolymer according to Embodiment 1 or 2 and at least one inorganic binder, preferably, the at least one inorganic binder is a hydraulic binder, a latent hydraulic binder or an inorganic binder based on calcium sulfate, the construction material composition.

[0159] 4. The construction material composition according to Embodiment 3, wherein the construction material comprises at least one additional inorganic binder selected from the group consisting of a hydraulic binder, a latent hydraulic binder, an inorganic binder based on calcium sulfate and mixtures thereof.

[0160] 5. A hydraulic binder is included, and the hydraulic binder is preferably selected from the group consisting of Portland cement, calcium aluminate cement, sulfoaluminate cement and mixtures thereof, and / or A latent hydraulic binder is included, and the latent hydraulic binder is preferably blast furnace slag, the construction material composition according to Embodiment 3 or 4.

[0161] 6. An inorganic binder based on calcium sulfate is included, the inorganic binder is in its anhydrous or hydrated form, and is preferably calcined gypsum, the construction material composition according to any one of Embodiments 3 to 5.

[0162] 7. Use of the nonionic copolymer according to Embodiment 1 or 2 in a construction material composition, preferably to improve the robustness against variations in clay without delaying the setting time of the construction material composition, or in a pretreatment before adding an inorganic binder to a composition containing the nonionic copolymer.

[0163] Use of the construction material composition according to Embodiment 3 in the production of dry mortar mixtures or concrete construction applications, preferably for sheet materials, self-leveling underlay or overlay materials, screeds, repair mortars, grouts, plasters, tile adhesives.

Examples

[0164] Measurement method GPC measurements were carried out using a Waters Alliance 2695 separation module.

[0165] M W Measurements were performed by GPC using Shodex OH(pak)SB-804 HQ and SB-802.5 HQ columns (Showa Denko K.K.), and PEG / PEO or PSS (sodium salt) or PAA (sodium salt) was used for calibration.

[0166] The polycarboxylic acid ether (Melflux® 4930 F) was purchased in powder form from BASF SE. The polydiallyldimethylammonium chloride (PolyDADMAC) had a solids content in water of over 85% by weight. The viscosity of the 25% solution at 20 °C was 370 mPas. The bentonite was purchased from Alfa Aesar. Portland cement CEM I 52.5 N was used.

[0167] Example 2 1 liter of a four-necked flask equipped with a stirrer, thermometer, reflux condenser and metering pump was charged with 100 g of water and 400 g (0.13 mol) of vinyl oxybutyl polyethylene glycol 3000 (prepared by ethoxylating hydroxybutyl vinyl ether with 66 mol of ethylene oxide). After warming the mixture to 75 °C, 0.5 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fuji Film Wako Pure Chemical Industries, Ltd.) was added. After stirring for a short time, a mixture of 400 g of water, 66 g (0.65 mol) of dimethylacrylamide (DMAA, 98%) and 1 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fuji Film Wako Pure Chemical Industries, Ltd.) was added within 45 minutes. During the addition, the temperature rose to about 83 °C and the viscosity increased significantly. After the addition, the solution was maintained at 80 °C for 45 minutes.

[0168] By doing so, an aqueous solution of a copolymer having an average molecular weight Mw = 51,518 g / mol (determined by GPC) and a solid content of 53.4% was obtained.

[0169] Example 3 1 liter of a four-necked flask equipped with a stirrer, thermometer, reflux condenser and metering pump was charged with 100 g of water and 400 g (0.36 mol) of vinyl oxybutyl polyethylene glycol 1100 (prepared by ethoxylating hydroxybutyl vinyl ether with 24 mol of ethylene oxide). After warming the mixture to 75 °C, 0.5 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fuji Film Wako Pure Chemical Industries, Ltd.) was added. After stirring for a short time, a mixture of 400 g of water, 184 g (1.81 mol) of dimethylacrylamide (DMAA, 98%) and 1 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fuji Film Wako Pure Chemical Industries, Ltd.) was added within 45 minutes. During the addition, the temperature rose to about 85 °C and the viscosity increased significantly. After the addition, the solution was maintained at 80 °C for 45 minutes.

[0170] By doing so, an aqueous solution of a copolymer having an average molecular weight Mw = 56,072 g / mol (determined by GPC) and a solid content of 54.2% was obtained.

[0171] Example 4 100 g of water and 400 g (0.13 mol) of vinyl oxybutyl polyethylene glycol 3000 (prepared by ethoxylating hydroxybutyl vinyl ether with 66 mol of ethylene oxide) were charged into a 1-liter four-necked flask equipped with a stirrer, a thermometer, a reflux condenser, and a metering pump. After warming the mixture to 75°C, 0.5 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fujifilm Wako Pure Chemical Corporation) was added. After stirring for a short time, a mixture of 400 g of water, 121 g (2.0 mol) of dimethylacrylamide (DMAA, 98%), 3 g of mercaptoethanol, and 1 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fujifilm Wako Pure Chemical Corporation) was added within 45 minutes. During the addition, the temperature rose to about 81°C and the viscosity increased significantly. After the addition, the solution was maintained at 80°C for 45 minutes.

[0172] By doing so, an aqueous solution of a copolymer having an average molecular weight Mw = 31,544 g / mol (determined by GPC) and a solid content of 51.3% was obtained.

[0173] Example 5 A 1-liter four-necked flask equipped with a stirrer, thermometer, reflux condenser and metering pump was charged with 100 g of water and 400 g (0.17 mol) of methallyl polyethylene glycol-2400. After warming the mixture to 75 °C, 0.5 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fujifilm Wako Pure Chemical Corporation) was added. After stirring for a short time, a mixture of 400 g of water, 84 g (0.83 mol) of dimethylacrylamide (DMAA, 98%) and 1 g of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (V-50, from Fujifilm Wako Pure Chemical Corporation) was added within 45 minutes. During the addition, the temperature rose to about 82 °C and the viscosity increased significantly. After the addition, the solution was maintained at 80 °C for 45 minutes.

[0174] By doing so, an aqueous solution of a copolymer having an average molecular weight Mw = 77,167 g / mol (determined by GPC) and a solid content of 53.1% was obtained.

[0175] To evaluate the robustness of various clay inactivators, all of them were mixed with Melflux 4930 in a 70 / 30 ratio and added so that the initial flow values were comparable without further mixing of the clay. Bentonite was used as the clay source. As references, pure high-fluidizing agents Melflux 4930 and PolyDADMAC were used.

[0176] Cement mortar was prepared based on the method described in DIN EN 196-1. The additive mixture was dissolved in mixing water (w / c = 0.35), and a dry mortar mixture containing 900 g of Portland cement and 1350 g of standard sand (available from Normensand GmbH, DIN EN 196-1) was added. Then, mixing was started at a low speed (140 rpm). After 60 seconds, the stirring speed was increased (285 rpm) and continued for 30 seconds. Then, stirring was stopped for 90 seconds and then continued at 285 rpm for 60 seconds.

[0177] Immediately after the stirring process, the slump flow of the sample was determined using a Haegermann cone. The test method was based on the SVB-Richtlinie des Deutschen Ausschusses fuer Stahlbeton (Deutscher Ausschuss fuer Stahlbetonbau (Ed.): DAfStb-Richtlinie Selbstverdichtender Beton (SVB-Richtlinie) Berlin, 2003).

[0178] The Haegermann cone (d = 70 mm at the upper end, d = 100 mm at the lower end, h = 60 mm) was placed in the center of a dry glass plate with a diameter of 400 mm and filled with cement mortar. The cone was lifted 5 minutes after the cement and water first came into contact, and the average diameter of the formed cake was measured.

[0179] The results of the mortar tests are summarized in the following table.

[0180]

Table 1

[0181] All of the samples according to the present invention have reliably shown a significant improvement in robustness against clay admixture (the slump flow decreases less when sodium-type bentonite is added). Compared with prior art clay inactivators (e.g., PolyDADMAC) that also have other drawbacks such as containing chlorides, all of the examples of the present invention shown here have shown a significant improvement in robustness against clay.

[0182] Gypsum slurry Furthermore, tests regarding robustness against clay were carried out using a gypsum board test system. Melflux PCE 1493 L / 40% N.D. (from BASF) was used as the dispersant. In addition to the copolymer of the present invention as the clay inactivator, PolyDADMAC was also used as a reference for comparison in Comparative Example 1. The clay to be incorporated was introduced via the gypsum source.

[0183] The hemihydrate used had the following composition.

[0184]

Table 2

[0185] With the amount of the dispersant kept constant, the required amount of the clay inactivator was determined. All the tests were evaluated using the knife cut test procedure with the same setting of the setting time. The wet density was ensured to be equal by adding the required amount of foam.

[0186] Preparation of foam: Foam based on fatty alkyl ether sulfate was produced as follows: A surfactant solution containing 0.5% of Vinapor GYP 2680 (from BASF) was filled into a supply tank and led to a foaming machine. The surfactant solution was changed into foam by using a stator / rotor mechanism and adding compressed air. The bubble density was adjusted to 75 g / L.

[0187] Evaluation of the onset of setting: The onset of setting was determined using the so-called knife cut method (similar to DIN EN 13279-2).

[0188] Evaluation of flow: The flow after 60 seconds was determined. After adding the powder component to the liquid, it was necessary to immerse the gypsum for 15 seconds. Then, the slurry was stirred for 30 seconds with a Hobart mixer. After a total of 45 seconds had elapsed, the gypsum slurry was filled up to the upper end of the cylinder and lifted after 60 seconds. Finally, the diameter of the spread paste was measured along two orthogonal axes using calipers.

[0189] Comparative Example 3 A mixture of 350 g of gypsum (β - hemihydrate from natural sources) and 1.35 g of an accelerator (anhydrous ground in a ball mill to adjust the setting time to about 2:20 minutes) was dispersed in a liquid. The liquid was taken to contain 0.035 g of Plastretard (from Sicit 2000), 0.49 g of Melflux PCE 1493 L (from BASF), 0.210 g of PolyDADMAC and 192.03 g of water. Thereafter, it was necessary to immerse the powder in the liquid for 15 seconds. Then, the slurry was stirred for 30 seconds at level II (285 rpm) using a Hobart mixer. During that time, 24.97 g of a foam based on fatty alkyl ether sulfate (density 75 g / L) was added to the slurry to adjust the wet density of the gypsum slurry to 1000 ± 10 kg / m 3 The flow was 13.2 cm.

[0190] Comparative Example 4 A mixture of 350 g of gypsum (β - hemihydrate from natural sources) and 1.35 g of an accelerator (anhydrous ground in a ball mill to adjust the setting time to about 2:20 minutes) was dispersed in a liquid. The liquid was taken to contain 0.035 g of Plastretard (from Sicit 2000), 0.49 g of Melflux PCE 1493 L and 192.03 g of water. Thereafter, it was necessary to immerse the powder in the liquid for 15 seconds. Then, the slurry was stirred for 30 seconds at level II (285 rpm) using a Hobart mixer. During that time, 24.97 g of a foam based on fatty alkyl ether sulfate (density 75 g / L) was added to the slurry to adjust the wet density of the gypsum slurry to 1000 ± 10 kg / m 3 Due to the paste - like consistency, the flow could not be measured.

[0191] Example 5 of the Invention A mixture of 350 g of gypsum (β - hemihydrate from natural sources) and 1.35 g of accelerator (anhydrite finely ground in a ball mill to adjust the setting time to about 2:20 minutes) was dispersed in a liquid. The liquid was taken to contain 0.035 g of Plastretard (from Sicit 2000), 0.49 g of Melflux PCE 1493 L (from BASF), 0.179 g of the polymer of Example 2, and 196.57 g of water. Thereafter, it was necessary to immerse the powder in the liquid for 15 seconds. Then, the slurry was stirred for 30 seconds at level II (285 rpm) using a Hobart mixer. During that time, 20.43 g of a foam based on fatty alkyl ether sulfate (density 75 g / L) was added to the slurry to adjust the wet density of the gypsum slurry to 1000 ± 10 kg / m 3 to. The flow was 18.2 cm.

[0192] Example 6 of the Invention A mixture of 350 g of gypsum (β - hemihydrate from natural sources) and 1.35 g of accelerator (anhydrite finely ground in a ball mill to adjust the setting time to about 2:20 minutes) was dispersed in a liquid. The liquid was taken to contain 0.035 g of Plastretard (from Sicit 2000), 0.49 g of Melflux PCE 1493 L (from BASF), 0.161 g of the polymer of Example 3, and 196.57 g of water. Thereafter, it was necessary to immerse the powder in the liquid for 15 seconds. Then, the slurry was stirred for 30 seconds at level II (285 rpm) using a Hobart mixer. During that time, 20.43 g of a foam based on fatty alkyl ether sulfate (density 75 g / L) was added to the slurry to adjust the wet density of the gypsum slurry to 1000 ± 10 kg / m 3 to. The flow was 18.6 cm.

[0193] Example 7 of the Invention A mixture of 350 g of gypsum (β - hemihydrate from natural sources) and 1.35 g of accelerator (anhydrous ground in a ball mill to adjust the setting time to about 2:20 minutes) was dispersed in a liquid. The liquid was taken to contain 0.035 g of Plastretard (from Sicit 2000), 0.49 g of Melflux PCE 1493 L (from BASF), 0.179 g of the polymer of Example 4 and 196.57 g of water. Thereafter, it was necessary to immerse the powder in the liquid for 15 seconds. Thereafter, the slurry was stirred for 30 seconds at level II (285 rpm) using a Hobart mixer. During that time, 20.43 g of a foam based on fatty alkyl ether sulfate (density 75 g / L) was added to the slurry to adjust the wet density of the gypsum slurry to 1000 ± 10 kg / m 3 The flow was 18.1 cm.

[0194] The results of the gypsum tests are summarized in the following table (Dos. represents the addition amount).

[0195]

Table 3

[0196] All of the examples of the present invention show a significant improvement in the addition efficiency compared to the prior art (PolyDADMAC). In addition, a favorable effect on the foam is seen, and it is clear that the foam addition time for achieving the target wet density in the gypsum slurry is shortened.

Claims

1. A building material composition comprising: A) the following monomer components: i) a monomer component A containing an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) a monomer component B containing an ethylenically unsaturated monomer containing at least one polyether moiety and at least one nonionic copolymer containing a residue based on the above; B) at least one inorganic binder based on calcium sulfate A building material composition comprising.

2. The at least one polyether moiety of monomer component B has the structural unit (a) *-U-(C(O)) ｋ -X-(AlkO) ｎ -W (a) (wherein * represents the bonding site to the polymer, U is a chemical bond or C １ ~C ８ alkylene, X is O, N or NR １ and k is 0 or 1, n is an integer having an average value of 24 to 300 based on the whole nonionic copolymer, Alk is C ２ ~C ４ alkylene, Alk may be the same or different within the (AlkO) ｎ group, W is H, C １ ~C ６ alkyl, aryl or Y-F, Y is a linear or branched C ２ ~C ８ alkylene which may be further substituted with phenyl, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members are R ２ may be bonded to the part, and 1 or 2 carbon ring members may be present as carbonyls, R １ is H, C １ ~C ４ alkyl or benzyl, and R ２ is H, C １ ~C ４ alkyl or benzyl), The construction material composition according to claim 1, comprising

3. A construction material composition, A) The following monomer components: i) A monomer component A containing an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety, and ii) A monomer component B containing an ethylenically unsaturated monomer containing at least one polyether moiety At least one nonionic copolymer containing a residue based on, wherein the at least one polyether moiety of monomer component B has a structural unit (a) * - U - (C(O)) ｋ - X - (AlkO) ｎ - W (a) (In the formula,[[]] * represents a bonding site to the polymer,[[]] U is a chemical bond or C ２ ~C ８ alkylene, X is O, N or NR １ and k is 0 or 1,[[]] n is an integer having an average value of 24 to 300 based on the whole nonionic copolymer,[[]] Alk is C ２ ~C ４ alkylene, and Alk is (AlkO) ｎ may be the same or different within the base, W is H, C １ ~C ６ alkyl, aryl or Y-F, Y is a linear or branched C that may be further substituted with phenyl ２ ~C ８ alkylene, F is a 5- to 10-membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen atoms and carbon atoms, 1, 2 or 3 additional heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members may be bonded to the R ２ moiety, and 1 or 2 carbon ring members may be present as carbonyls, R １ is H, C １ ~C ４ alkyl or benzyl, and R ２ is H, C １ ~C ４ alkyl or benzyl, provided that when U is a chemical bond, k is 0) at least one nonionic copolymer comprising; B) at least one inorganic binder selected from a hydraulic binder or a latent hydraulic binder A construction material composition comprising.

4. The monomer component A is selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 1-vinyl-2-pyrrolidinone, N-vinylcaprolactam, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 1-vinylimidazole, 4-vinylpyridine and 1-vinyl-1,2,4-triazole, and preferably N,N-dimethylacrylamide, and the construction material composition according to any one of claims 1 to 3.

5. The nonionic copolymer has the formula (1) 【Chemical formula 1】 (wherein R Ａ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ alkyl; R Ｂ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ alkyl; R Ｃ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ alkyl; and n is an integer from 0 to 10) having, and preferably having the formula (1a) or (1b) [Chemical Formula 2] The construction material composition according to any one of claims 1 to 4, further comprising a residue based on the monomer component C having

6. C) A fluidizing agent further comprising, preferably, the fluidizing agent is A water-soluble comb-shaped polymer present as a copolymer containing a side chain having an ether functional group and an acid functional group on the main chain, or A composition containing a polycondensate wherein the polycondensate is (I) At least one structural unit consisting of an aromatic or heteroaromatic moiety having a polyether side chain, preferably a polyalkylene glycol side chain, more preferably a polyethylene glycol side chain, and (II) At least one structural unit consisting of an aromatic or heteroaromatic moiety having at least one phosphate ester group and / or a salt thereof The construction material composition according to any one of claims 1 to 5, containing

7. A nonionic copolymer for use in a construction material composition, comprising the following monomer components: i) A monomer component A selected from the group consisting of N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, 4-acryloylmorpholine, N-methyl-N-vinylacetamide, 4-vinylpyridine, and 1-vinyl-1,2,4-triazole, preferably N,N-dimethylacrylamide; ii) Structural unit (a) * - U - (C(O)) ｋ - X - (AlkO) ｎ - W (a) (wherein, * represents a bonding site to the polymer, U is a chemical bond or C ２ ~ C ８ alkylene, X is O, N or NR １ wherein, k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C ２ ~ C ４ alkylene, Alk may be the same or different within the (AlkO) ｎ group, W is H, C １ ~ C ６ alkyl, aryl or Y - F, Y is a linear or branched C ２ ~ C ８ alkylene which may be further substituted with phenyl, F is a 5 - to 10 - membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen atoms and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, the nitrogen ring members may be bonded to the R ２ moiety, and 1 or 2 carbon ring members may be present as carbonyls, R １ is H, C １ ~C ４ is alkyl or benzyl, and R ２ is H, C １ ~C ４ is alkyl or benzyl, provided that when U is a chemical bond, k is 0); a monomer component B containing an ethylenically unsaturated monomer containing at least one polyether moiety containing; and iii) optionally, formula (1) 【Chemical formula 3】 (wherein R Ａ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ is alkyl; R Ｂ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ is alkyl; R Ｃ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ is alkyl; and n is an integer from 0 to 10) a monomer component C having a nonionic copolymer containing residues based on.

8. (i) The monomer component A is N,N-dimethylacrylamide; (ii) The at least one polyether moiety of the monomer component B is a structural unit (a) *-U-(C(O)) ｋ -X-(AlkO) ｎ -W (a) (wherein * represents a bonding site to the polymer, U is a chemical bond or C ２is an alkylene, X is O, k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C ２ ~C ４ alkylene, and Alk may be the same or different within the (AlkO) ｎ group, W is H or methyl, provided that when U is a chemical bond, k is 0) and; and iii) Optionally, the monomer component C is of the formula (1) [Chemical Formula 4] (wherein, R Ａ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ alkyl; R Ｂ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ alkyl; R Ｃ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ alkyl; and n is an integer of 1 to 5) and preferably has the formula (1a) or (1b) [Chemical Formula 5] The nonionic copolymer according to claim 7, having.

9. A construction material composition comprising at least one nonionic copolymer and at least one inorganic binder according to claim 7 or 8, preferably, the at least one inorganic binder is a hydraulic binder, a latent hydraulic binder or an inorganic binder based on calcium sulfate.

10. The construction material composition according to any one of claims 1 to 6 or 9, wherein the construction material comprises at least one additional inorganic binder selected from the group consisting of a hydraulic binder, a latent hydraulic binder, an inorganic binder based on calcium sulfate and mixtures thereof.

11. A hydraulic binder is included, and the hydraulic binder is preferably selected from the group consisting of Portland cement, calcium aluminate cement, sulfoaluminate cement and mixtures thereof, and / or A latent hydraulic binder is included, and the latent hydraulic binder is preferably blast furnace slag. The construction material composition according to any one of claims 1 to 6, 9 or 10.

12. An inorganic binder based on calcium sulfate is included, and the inorganic binder is in its anhydrous or hydrated form and is preferably calcined gypsum. The construction material composition according to any one of claims 1 to 6 or 9 to 11.

13. A nonionic copolymer comprising the following monomer components: i) A monomer component A comprising an ethylenically unsaturated monomer containing at least one alkylamide moiety or at least one nitrogen-containing heterocyclic moiety; ii) Structural unit (a) * - U - (C(O)) ｋ - X - (AlkO) ｎ - W (a) (In the formula, * represents a bonding site to the polymer, U is a chemical bond or C １ ~ C ８ alkylene, X is O, N or NR １ and k is 0 or 1, n is an integer having an average value of 3 to 300 based on the entire nonionic copolymer, Alk is C ２ - C ４ alkylene, and Alk may be the same or different within the (AlkO) ｎ group, W is H, C １ - C ６ alkyl, aryl or Y - F, Y is a linear or branched C ２ - C ８ alkylene which may be further substituted with phenyl, F is a 5 - to 10 - membered nitrogen heterocycle bonded to Y via nitrogen, and in addition to nitrogen atoms and carbon atoms, 1, 2 or 3 further heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur may be present as ring members, and the nitrogen ring members may be bonded to the R ２ moiety, and 1 or 2 carbon ring members may be present as carbonyl, R １ is H, C １ - C ４ alkyl or benzyl, and R ２ is H, C １ - C ４ alkyl or benzyl) a monomer component B comprising an ethylenically unsaturated monomer containing at least one polyether moiety; and iii) optionally, formula (1) [Chemical formula 6] (wherein R Ａ is H, OH, (C １ - C ３ alkylene) - OH or C １ - C ３ alkyl; R Ｂ is H, OH, (C １ - C ３(alkylene)-OH or C １ ~C ３ is alkyl; R Ｃ is H, OH, (C １ ~C ３ alkylene)-OH or C １ ~C ３ is alkyl; and n is an integer from 0 to 10) Use of a nonionic copolymer containing a residue based on monomer component C in a construction material composition, preferably for improving the robustness against clay variations without delaying the setting time of the construction material composition.

14. Use of the nonionic copolymer according to claim 7 or 8 in a construction material composition, preferably for improving the robustness against clay variations without delaying the setting time of the construction material composition, or in a pretreatment before adding an inorganic binder of a composition containing the nonionic copolymer.

15. Use of the construction material composition according to any one of claims 1 to 6 or 9 in the production of dry mortar mixtures or concrete construction applications, preferably flat sheets, self-leveling underlayments or overlays, screeds, repair mortars, grouts, plasters, tile adhesives.

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