Amino acid additives and related compositions and methods

Abstract

The amino acid additive may comprise an amino acid, optionally a polysaccharide-based polymer, optionally a weathering reducing additive, and optionally a filler. The amino acid additive may be used in building formulations (e.g., cement, mortar, stucco, etc.), redispersible polymer powder formulations, and polymer dispersions. The amino acid additive may increase the airing time, increase wettability, and / or increase processing time of the building formulation.

Description

Cross-references to related applications

[0001] This application claims priority to U.S. Provisional Patent Application Serial No. 63 / 581,125, filed September 7, 2023, entitled “AMINO ACID ADDITIVES AND RELATED COMPOSITIONS AND METHODS”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to amino acid additives and related compositions, including but not limited to building formulations (e.g., cement, mortar, plaster, etc.), redispersible polymer powder formulations, and polymer dispersions. This disclosure also includes methods relating to amino acid additives and related compositions. Background Technology

[0003] Cement compositions are used in a variety of building compositions, such as tile cement, mortar, plaster, etc. An important characteristic of building compositions used to bond or adhere two structures (e.g., a base surface and a tile) together is the length of time the composition can maintain its adhesive strength after exposure to the environment. For example, after a building composition is applied to a surface (e.g., a floor or slab), the surrounding air may cause reactions at the exposed surface of the composition that reduce the adhesive properties of the exposed composition. The structure applied thereto (e.g., a tile) may then fail to adhere to the building composition, weakening the overall structure of the bonded structure.

[0004] The required curing time is defined by the bond tensile strength value after a specified laying time (or curing time) according to European Standard EN 12004. Curing time is often shortened due to the formation of an undesirable skin on the surface of building materials, which can prevent satisfactory wetting of the tiles even when the adhesive is still soft inside. Maintaining a bond tensile strength greater than 0.5 N / mm² is required. 2 A minimum 30-minute drying time is typically a good indicator of a building material's quality, especially for mortar used for laying ceramic tiles.

[0005] While additives are developed to improve setting time, these additives typically adversely affect other properties such as early strength adhesion, anti-sagging, and setting time. Summary of the Invention

[0006] This disclosure relates to amino acid additives and related compositions, including but not limited to building formulations (e.g., cement, mortar, plaster, etc.), redispersible polymer powder formulations, and polymer dispersions.

[0007] Some embodiments disclosed herein include a building formulation comprising: an inorganic binder; a redispersible polymer powder; and an amino acid additive containing amino acids, comprising 0.01 wt% to 2 wt% of the total dry weight of the building formulation; wherein the building formulation has a density greater than 0.5 N / mm² after a 30-minute drying time. 2 The bond tensile strength (EN 12004, after curing for 28 days at 23°C ± 2°C and 50% ± 5% relative humidity). In some cases, the bond tensile strength after a 30-minute curing time is at least 10% greater than that of comparable building materials without amino acids.

[0008] Some embodiments disclosed herein include the use of amino acids to increase the settling time of building materials, such as cement-based tile adhesives.

[0009] Some embodiments disclosed herein include the use of amino acids to improve the wetting of ceramic tiles with building formulations (e.g., cement-based tile adhesives).

[0010] Some embodiments disclosed herein include the use of amino acids to increase the processing time of building materials, such as cement plaster and / or cement-based plaster in composite insulation systems.

[0011] Some embodiments of this disclosure include a redispersible polymer powder formulation comprising: 90 wt% to 99.9 wt% of redispersible polymer powder based on the total dry weight of the redispersible polymer powder formulation; and 0.1 wt% to 10 wt% of an amino acid additive containing amino acids based on the total dry weight of the redispersible polymer powder formulation.

[0012] Some embodiments disclosed herein include a polymer dispersion formed by free radical emulsion polymerization, the polymer dispersion comprising: a polymer; and 0.1 wt% to 10 wt% of an amino acid additive.

[0013] Some embodiments disclosed herein include an amino acid additive comprising: 20 wt% to 99 wt% of amino acids based on the total dry weight of the amino acid additive; and 1 wt% to 80 wt% of a polysaccharide-based polymer based on the total dry weight of the amino acid additive. Detailed Implementation

[0014] This disclosure relates to amino acid additives and related compositions, including but not limited to building formulations (e.g., cement, mortar, plaster, etc.), redispersible polymer powder formulations, and polymer dispersions. This disclosure also includes methods relating to amino acid additives and related compositions.

[0015] Unrestricted by theory, it is believed that amino acid additives, especially those containing glycine, reduce skin formation on building materials such as cement, mortar, and plaster, which increases the curing time of said building materials. This is particularly advantageous in locations where skin formation is more concerning at higher temperatures and / or lower humidity. As shown herein, amino acid additives can significantly exceed the curing time defined by EN 12004.

[0016] Furthermore, the amino acid additives disclosed herein can be included in low concentrations, which can minimize the impact on other physical properties of building materials.

[0017] amino acid additives

[0018] The amino acid additives disclosed herein may comprise amino acids and optionally polysaccharide-based polymers, weathering reducers, fillers, or any combination thereof.

[0019] Amino acids can include any amino acid. In some aspects, amino acids are hydrophobic amino acids. Examples of amino acids may include, but are not limited to, glycine, alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan, analogues, and any combination thereof. In some aspects, amino acids include one or more of the following: glycine, alanine, valine, leucine, isoleucine, and methionine. Preferably, amino acids include one or more of the following: glycine, alanine, and valine. Most preferably, amino acids include glycine (or consist of glycine). For example, an amino acid may contain 80 wt% to 100 wt% glycine based on the total dry weight of the amino acid.

[0020] Amino acids may be present in the amino acid additive in an amount ranging from 1 wt% to 100 wt% (or 1 wt% to 99 wt%, or 20 wt% to 99 wt%, or 50 wt% to 99 wt%, or 1 wt% to 30 wt%, or 25 wt% to 50 wt%, or 30 wt% to 60 wt%, or 50 wt% to 99 wt%, or 50 wt% to 75 wt%, or 70 wt% to 85 wt%, or 80 wt% to 99 wt%, or 80 wt% to 100 wt%) of the total dry weight based on the amino acid additive.

[0021] Polysaccharide-based polymers may include unmodified polysaccharides, polysaccharide ethers, analogs, and any combination thereof. Examples of polysaccharide-based polymers may include, but are not limited to, starch (e.g., amylose and / or amylopectin), starch ethers (e.g., amylose and / or amylopectin ethers), cellulose, cellulose ethers (e.g., carboxymethyl cellulose, methyl cellulose, ethyl methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, and / or hydroxypropyl cellulose), guar gum, guar gum ether, dextran, dextran ether, analogs, and any combination thereof.

[0022] When included, the polysaccharide-based polymer may be present in the amino acid additive in an amount ranging from 1 wt% to 99 wt% (or 1 wt% to 80 wt%, or 1 wt% to 50 wt%, or 1 wt% to 20 wt%, or 15 wt% to 30 wt%, or 25 wt% to 50 wt%, or 50 wt% to 99 wt%, or 50 wt% to 75 wt%, or 70 wt% to 85 wt%, or 80 wt% to 99 wt%) of the total dry weight of the amino acid-based additive. The amino acid additive may not contain the polysaccharide-based polymer.

[0023] Examples of agents that reduce weathering agents may include, but are not limited to, terpenes, resin acids, rosin, terpene resins, terpene-phenol resins, analogs, and any combination thereof. Further details regarding agents that reduce weathering agents can be found in U.S. Patent Application Publication No. 2009 / 0223416, the entire contents of which are incorporated herein by reference.

[0024] When included, weathering-reducing additives may be present in the amino acid additives in an amount ranging from 0.1 wt% to 25 wt% (or 0.1 wt% to 5 wt%, or 1 wt% to 15 wt%, or 5 wt% to 25 wt%) of the total dry weight of the amino acid additives. The amino acid additives may not contain weathering-reducing additives.

[0025] Examples of fillers may include, but are not limited to, carbonates (e.g., calcium carbonate, magnesium carbonate, limestone, dolomite and / or chalk), silicates (e.g., quartz sand, marble sand and / or silica sand), basalt, perlite, vermiculite, clay, slaked lime, talc, mica, fumed silica, polystyrene particles, rubber particles, the like, and any combination thereof.

[0026] When included, filler may be present in the amino acid additive in an amount ranging from 0.1 wt% to 90 wt% (or 0.1 wt% to 80 wt%, or 0.1 wt% to 5 wt%, or 1 wt% to 20 wt%, or 10 wt% to 40 wt%, or 25 wt% to 50 wt%, or 40 wt% to 80 wt%, or 50 wt% to 90 wt%) of the total dry weight based on the amino acid additive. The amino acid additive may be filler-free.

[0027] For example, the amino acid additive disclosed herein may comprise 1 wt% to 100 wt% amino acids, 0 wt% to 99 wt% polysaccharide-based polymers, 0 wt% to 25 wt% weathering-reducing additives, and 0 wt% to 90 wt% fillers, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive disclosed herein may comprise 20 wt% to 100 wt% amino acids, 0 wt% to 80 wt% polysaccharide-based polymers, 0 wt% to 25 wt% weathering-reducing additives, and 0 wt% to 80 wt% fillers, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive disclosed herein may comprise 50 wt% to 100 wt% amino acids, 0 wt% to 50 wt% polysaccharide-based polymers, 0 wt% to 25 wt% weathering-reducing additives, and 0 wt% to 50 wt% fillers, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive disclosed herein may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0 wt% to 25 wt% a weathering-reducing additive, and 0 wt% to 10 wt% filler, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive disclosed herein may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% a weathering-reducing additive, and 0 wt% to 50 wt% filler, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive disclosed herein may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% an anti-weathering additive, and 0.1 wt% to 50 wt% a filler, each based on the total dry weight of the amino acid additive. The sub-scopes and compositions detailed above apply to a wider range of the aforementioned amino acid additive compositions and to each of the compositions.

[0028] Amino acid additives can be solids, pastes, or fluids. For example, amino acid additives can be in the form of powders or granular blends. In another example, amino acid additives may contain solvents that disperse and / or solubilize the components of the amino acid additive.

[0029] Examples of solvents may include, but are not limited to, water, methanol, ethanol, the like, and any combination thereof. The choice of solvent and / or solvent blend should be made so as not to adversely interact with the components of the amino acid additive.

[0030] The amino acid additive can be used in a pH range of 2 to 9 (or 3 to 8, or 4 to 7, or 4 to 8), and it should again be selected to not adversely interact with the components of the amino acid additive. Buffers can be used to help maintain the desired pH.

[0031] Amino acid additives containing solvents may have a solids content of 10 wt% to 90 wt% (or 10 wt% to 50 wt%, or 20 wt% to 60 wt%, or 30 wt% to 70 wt%, or 40 wt% to 80 wt%, or 50 wt% to 90 wt%).

[0032] Polymer dispersions containing amino acid additives

[0033] This disclosure also relates to the use of the aforementioned amino acid additives in polymer dispersions prepared by free radical emulsion polymerization. As used herein, “pphm” means parts per hundred parts of monomer and is calculated based on all monomers present in the dispersion (e.g., vinyl acetate, ethylene, and vinyl neodecanoate). The content during post-addition or any step after polymerization can then be described as a percentage. Although various ranges and subranges are provided, this document specifically considers any values ​​within these ranges and combinations of points within these ranges.

[0034] Furthermore, polymer compositions may be described herein using the chemical names of one or more monomers, which will be understood by those skilled in the art to mean that the polymer contains the polymeric form of each monomer. For example, a polymer of ethylene and vinyl acetate or an ethylene-vinyl acetate polymer refers to the product of polymerizing ethylene and vinyl acetate.

[0035] The polymer dispersion may comprise the amino acid additives disclosed herein, polymer particles, and optionally other additives. The polymer dispersion may be prepared using emulsion polymerization, wherein the amino acid additives disclosed herein may be added before, during, and / or after polymerization initiation.

[0036] The polymer dispersions described herein can be prepared using emulsion polymerization processes, and may also include pre-feeding and optionally post-feeding. The basic preparation of this type of polymer dispersion is well known and has been described in numerous instances and is therefore known to those skilled in the art. Such processes are, for example, described in U.S. Patent Nos. 5,633,334 and... Encyclopedia of Polymer Science and Engineering The description is found in Volume 8, page 659 and thereafter (1987). The contents of these publications are incorporated herein by reference in their full text.

[0037] Polymerization can be carried out in one, two, or more stages with different combinations of monomers in any manner known per se, producing copolymer dispersions with particles having homogeneous or non-homogeneous (e.g., core-shell or hemispherical) morphologies. Any reactor system can be used, such as batch, circulating, continuous, cascade, etc.

[0038] Examples of monomers may include, but are not limited to, vinyl esters (e.g., vinyl acetate, vinyl propionate, C4 to C20 vinyl esters, etc.), ethylene, vinyl chloride, styrene, butadiene, acrylates (e.g., methyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, etc.), analogs, and any combination thereof. Vinyl ester monomers may comprise straight-chain and / or branched C4 to C20 long chains. Examples of straight-chain and branched vinyl esters may include, but are not limited to, vinyl butyrate, vinyl isobutyrate, vinyl benzoate, vinyl-2-ethylhexanoate, vinyl esters of [α]-branched carboxylic acids having 5 to 11 carbon atoms in the acid moiety (e.g., versatic acids that form vinyl esters, such as those sold as VeoVa 9, VeoVa 10, and VeoVa 11, including vinyl neodecanoate, and vinyl esters of neopentanoic acid, 2-ethylhexanoic acid, lauric acid, palmitic acid, myristic acid, and stearic acid), and any combination thereof.

[0039] Examples of polymers produced by emulsion polymerization may include, but are not limited to, poly(vinyl acetate), ethylene-vinyl acetate copolymers, ethylene-vinyl acetate-vinyl tert-carbonate copolymers, ethylene-vinyl acetate (meth)acrylate copolymers, ethylene-vinyl acetate-vinyl chloride copolymers, vinyl acetate-vinyl tert-carbonate copolymers, vinyl acetate-vinyl tert-carbonate (meth)acrylate copolymers, vinyl tert-carbonate (meth)acrylate copolymers, styrene-acrylate copolymers, styrene-butadiene copolymers, analogs, and any combination thereof. For example, the polymer may contain 60 wt% to 96 wt% vinyl acetate and 4 wt% to 40 wt% ethylene.

[0040] One or more monomers may be added one-time, continuously, or discontinuously. In some aspects, a monomer pre-feed comprising 10% to 80% (or 15% to 75%, or 20% to 70%, or 25% to 65%, or 30% to 60%, or 35% to 55%, or 40% to 50%) of the total monomer may be pre-charged into the reactor. The pre-feed may also contain a stabilizer in an amount of 3.0 pphm to 12.0 pphm (or 4.0 pphm to 11.0 pphm, or 5.0 pphm to 10.0 pphm, or 6.0 pphm to 9.0 pphm, or 7.0 pphm to 8.0 pphm). The pre-feed may also contain 3.0 pphm to 12.0 pphm (or 4.0 pphm to 11.0 pphm, or 5.0 pphm to 10.0 pphm, or 6.0 pphm to 9.0 pphm, or 7.0 pphm to 8.0 pphm) of surfactant.

[0041] In some respects, when using two monomers, the weight ratio of the first vinyl acetate monomer to the second vinyl ester monomer in the pre-feed can range from 1:10 to 10:1 (or 1:5 to 5:1, or 2:5 to 5:2, or 3:5 to 5:3, or 4:5 to 5:4, or approximately 1:1). In some respects, the first monomer can be a vinyl ester, such as vinyl acetate, and the second monomer can be ethylene. In some respects, the first monomer can be a vinyl ester, such as vinyl acetate, and the second monomer can be a different vinyl ester, such as C4 to C20 vinyl esters.

[0042] In some aspects, the pre-feed may contain a first monomer (e.g., vinyl acetate) at a concentration of 5 pphm to 40 pphm (or 10 pphm to 35 pphm, or 15 pphm to 30 pphm, or 20 pphm to 25 pphm). In other aspects, the pre-feed may contain a second monomer (e.g., C4 to C20 vinyl esters) at a concentration of 2 pphm to 20 pphm (or 3 pphm to 18 pphm, or 5 pphm to 16 pphm, or 7 pphm to 14 pphm, or 9 pphm to 12 pphm). In summary, the pre-feed may contain a total amount of monomers at a concentration of 7 pphm to 60 pphm (or 13 pphm to 58 pphm, or 15 pphm to 55 pphm, or 18 pphm to 50 pphm, or 20 pphm to 45 pphm, or 25 pphm to 35 pphm).

[0043] The stabilizer may comprise polyvinyl alcohol (PVA), including combinations of PVAs with different degrees of hydrolysis and viscosities. In some aspects, the stabilizer comprises a single PVA. The PVA may have a degree of hydrolysis of 80 mol% to 98 mol% (or 86 mol% to 90 mol%). The PVA may have a Höppler viscosity of 2 mPa·s to 30 mPa·s (or 2 mPa·s to 6 mPa·s, or 5 mPa·s to 15 mPa·s, or 10 mPa·s to 30 mPa·s). In embodiments where the stabilizer comprises at least two PVAs, at least one of the degrees of hydrolysis and viscosity is different, for example, 1) the first PVA has the same degree of hydrolysis as the second PVA but a different viscosity, 2) the first PVA has the same viscosity as the second PVA but a different degree of hydrolysis, or 3) the first PVA has a different degree of hydrolysis and a different viscosity than the second PVA. In aspects where three or more different PVAs are present, the degree of hydrolysis and viscosity may be selected similarly.

[0044] Surfactants may include one or more ionic surfactants, one or more nonionic surfactants, or combinations thereof. Examples of suitable ionic surfactants may include, but are not limited to, sodium, potassium, and ammonium salts of straight-chain aliphatic carboxylic acids with chain lengths of C12-C20; sodium hydroxyoctadecane sulfonate; sodium, potassium, and ammonium salts of hydroxy fatty acids with chain lengths of C12-C20 and their sulfonated and / or sulfated and / or acetylated products; alkyl sulfates (including those in the form of triethanolamine salts); alkyl (C10-C20) sulfonates; alkyl (C10-C20) aryl sulfonates and their sulfonated products; lignin sulfonic acids and their calcium, magnesium, sodium, and ammonium salts; and resins. Acids, hydrogenated and dehydrogenated resin acids and their alkali metal salts, sodium dodecyl diphenyl ether disulfonate, sodium alkyl sulfate or potassium alkyl sulfate, sulfated alkyl or aryl ethoxylates with an EO degree between 1 and 30, such as sodium ethoxylated lauryl ether sulfate, or diesters of sulfonated dicarboxylic acids having 4 to 8 carbon atoms, preferably salts of bis-C4-C18 alkyl esters, or mixtures of these salts, preferably salts of sulfonated succinic acid esters, more preferably salts of bis-C4-C18 alkyl esters of sulfonated succinic acid, such as alkali metal salts, or phosphates of polyethoxylated alkanols. Particularly suitable are alkyl (C10-C20) aryl sulfonates, such as alkylbenzene sulfonates, sodium alkyl sulfate or potassium alkyl sulfate, such as sodium lauryl sulfate, and sodium, potassium or ammonium salts of sulfated C10-C16 alkyl ethoxylates with an EO degree between 1 and 30.

[0045] Examples of nonionic surfactants may include, but are not limited to, acyl, alkyl, oleyl, and alkylaryl ethoxylates. These products are commercially available, for example, under the names GENAPOL©, LUTENSOL®, or EMULAN©. These include, for example, ethoxylated monoalkylphenols, dialkylphenols, and trialkylphenols (EO degree: 3 to 50, alkyl substituents: C4 to C12) and also ethoxylated fatty alcohols (EO degree: 3 to 80; alkyl: C8 to C36), especially C10-C14 fatty alcohols (3-40) ethoxylated, C11-C15 carbonyl synthetic alcohols (3-40) ethoxylated, C16-C18 fatty alcohols (11-80) ethoxylated, C11 carbonyl synthetic alcohols (3-40) ethoxylated, C13 carbonyl synthetic alcohols (3-40) ethoxylated, polyoxyethylene dehydrated sorbitol monooleate having 20 ethylene oxide groups, copolymers of ethylene oxide and propylene oxide having a minimum ethylene oxide content of 10% by weight, polyoxyethylene (4-40) ethers of oleyl alcohol, and polyoxyethylene (4-40) ethers of nonanol.

[0046] Pre-feeding can be supplied to the reactor as a feed, or each component can be added separately.

[0047] After the pre-feed is introduced into the reactor, the remaining monomer can be introduced into the reactor. The remaining monomer can be added at 20% to 90% (or 30% to 80%, or 40% to 70%, or 50% to 60%) of the total monomer used in the polymerization. In some aspects, at least a portion of the first monomer and at least a portion of the second monomer can be added to the pre-feed. In some aspects, at least a portion of the first monomer can be added to the pre-feed, and the second monomer may not be added to the pre-feed. Additionally, in some aspects, no emulsifier is added at any point during the methods described herein.

[0048] Suitable initiators for free radical polymerization, and for initiating and continuing polymerization during the preparation of dispersions, include known initiators capable of initiating free radical aqueous polymerization in multiphase systems. These initiators may include, but are not limited to, peroxides such as alkali metals and / or ammonium peroxide disulfide, azo compounds (more particularly water-soluble azo compounds), analogs, and any combination thereof.

[0049] The total amount of the redox initiator system may be included in the initial feed to the reactor at the start of polymerization. In some embodiments, however, a portion of the initiator is included in the initial feed at the start, and the remainder is added in one or more steps or continuously after the start of polymerization.

[0050] In embodiments where a redox initiator is used as a polymerization initiator, exemplary redox initiators include tert-butyl hydroperoxide and / or combinations of hydroperoxide with reducing agents, such as with sulfur compounds, examples being sodium salts of hydroxymethanesulfinic acid, Brüggolit FF6 and FF7, Rongalit C, sodium sulfite, sodium disulfite, sodium thiosulfate, and acetone-bisulfite adducts, or with ascorbic acid or with reducing sugars.

[0051] The amount of initiator or initiator combination used in this method varies within the typical range for aqueous polymerization in multiphase systems. Typically, the amount of initiator used will not exceed 5% by weight, based on the total amount of monomers to be polymerized. In some embodiments, it is preferred that the amount of initiator used is from 0.05% to 2% by weight, based on the total amount of monomers to be polymerized. In this context, the total amount of initiator can be included in the initial feed at the start of the polymerization process; however, it may be preferred in alternative methods that only a portion of the initiator is included in the initial feed at the start. After polymerization begins, the remaining initiator is added in one or more steps or sequentially. Addition can be done alone or together with other components, such as emulsifiers.

[0052] The molecular weight of a polymer dispersion can be adjusted by adding small amounts of one or more molecular weight regulator substances. These regulators, as they are known, are typically used in amounts up to 2% by weight based on the total amount of monomers to be polymerized. All substances known to those skilled in the art can be used as regulators. In some embodiments, preferred regulators include organothio compounds, silanes, allyl alcohols, and aldehydes.

[0053] In some embodiments, the polymer dispersion may contain a series of additional substances, such as plasticizers, preservatives, pH-adjusting agents, and / or defoamers.

[0054] The polymerization temperature typically ranges from 20°C to 150°C (or 50°C to 120°C). If appropriate, polymerization usually occurs at pressures of 2 bar to 150 bar (or 5 bar to 120 bar, or 10 bar to 100 bar).

[0055] In typical polymerization processes involving polymer dispersions such as vinyl acetate / ethylene / vinyl ester, vinyl acetate, vinyl ester, stabilizer packets, and other monomers (e.g., ethylene) can be polymerized in an aqueous medium at pressures up to 150 bar in the presence of one or more initiators. The aqueous reaction mixture in the polymerization vessel can be maintained at a pH of 3 to 7 using a suitable buffer.

[0056] The combination of several polymerization components (i.e., stabilizer packages, monomers, initiator system components, etc.) can vary widely. Typically, an aqueous medium containing at least a portion of the stabilizer package can initially be formed in the polymerization vessel, after which various other polymerization components are added to the vessel (but after pre-feeding).

[0057] Following the polymerization reaction and the post-addition of stabilizers, it may be desirable and / or necessary to ensure that the resulting copolymer dispersion is free of odorous substances, such as residual monomers and other volatile organic components. Odor removal can be carried out physically in ways known per se, such as by distillation (particularly by steam distillation) or by stripping with an inert gas. In some cases, the residual monomer content may be reduced chemically by post-polymerization via free radicals, more particularly by exposure to a redox initiator system. Post-polymerization using a redox initiator system comprising at least one organic peroxide and an organic and / or inorganic sulfite and / or sulfinic acid derivative is preferred. A combination of physical and chemical methods is particularly preferred, wherein the residual monomer content is reduced to below 5000 ppm (or below 4000 ppm, or below 3000 ppm, or below 2000 ppm, or below 1000 ppm, or below 500 ppm).

[0058] Polymerization is typically carried out at a pH range of 9 or less. To adjust the pH of the polymer dispersion, buffer systems, such as sodium acetate, or phosphate buffer systems, can be used. In some embodiments, a pH range of 2 to 9 is advantageous, for example, a pH range of 3 to 8.

[0059] As described herein, the polymer dispersions have glass transition temperatures ranging from -40°C to 40°C (or -40°C to -10°C, or -30°C to 0°C, or -20°C to 10°C, or -10°C to 20°C, or 0°C to 30°C, or 10°C to 40°C). Based on the monomers used, The glass transition temperature T of each of the resulting polymers (and therefore emulsion polymers) gIt can be determined both empirically and experimentally. Empirical calculations can be performed using the Fox equation (TG Fox, BulL Am. Phy.Soc. (ser II) [Proceedings of the American Physical Society (Vol. 2)] 1, 123 (1956), and Ullmann's Encyclopedia of Industrial Chemistry, VCH, Weinheim, Vol. 19, 4th edition, Publishing House Chemistry, Weinheim, 1980, pp. 17-18). 1 / T g =X a / T gA +X b / T gB +. . . +X n / T gn Where X a and X b It is the mass fraction (in weight %) of monomers A and B used, and T gA and T gB The glass transition temperature T of the corresponding homopolymers of A and B. g (in Kelvin). These are listed, for example, in Ullmann's Encyclopedia of Industrial Chemistry, VCH, Weinheim, Vol. A21 (1992), p. 169.

[0060] Determine the glass transition temperature T of the copolymer g Another approach is to determine this experimentally, for example using differential scanning calorimetry (DSC), where the midpoint temperature according to ASTM D3418-82 should be used. Experimental values ​​determined in this way may not perfectly correspond to calculated values ​​because calculations are based on empirical evidence and do not have the same accuracy for all monomer combinations. Furthermore, additional factors such as molecular weight, the possible block structure of the copolymer, a degree of inhomogeneity, and the effects of the stabilization system can influence the glass transition temperature Tglass transition temperature. g If there is a significant difference between the calculated and experimental values, the experimental values ​​should prevail.

[0061] The polymer dispersions provided herein can have a wide particle size distribution. The particle size distribution corresponding to the emulsifier-stabilized copolymer dispersions described herein may have only one maximum value. In some embodiments, the distribution may have two or more maximum values ​​and is a multimodal distribution of the emulsifier-stabilized copolymer dispersion. In some embodiments, it may be important that the overall particle size distribution of the emulsifier-stabilized copolymer dispersion is wide.

[0062] As provided herein, the emulsifier-stabilized copolymer dispersion has an average particle size (based on number distribution) of at least 100 nm (or at least 250 nm, or at least 500 nm, or at least 750 nm, or at least 1000 nm, or 100 nm to 5000 nm, or 100 nm to 750 nm, or 500 nm to 2000 nm, or 1000 nm to 3000 nm, or 2500 to 5000 nm).

[0063] The solids fraction of the polymer dispersions of the present invention having a wide particle size distribution is typically 30 wt% to 70 wt% (or 40% to 60%). The solids fraction of the polymer dispersion is based on the total solids content in the polymer dispersion before the amino acid additive is added to it.

[0064] The polymer dispersions provided herein may have viscosities ranging from 100 mPa-s to 20,000 mPa-s (or 100 mPa-s to 10,000 mPa-s, or 500 mPa-s to 7,500 mPa-s, or 500 mPa-s to 5,000 mPa-s, or 1,000 mPa-s to 2,500 mPa-s).

[0065] The polymer dispersion can be prepared using emulsion polymerization, wherein the amino acid additive disclosed herein can be added before, during and / or after the polymerization is initiated.

[0066] The amino acid additive used in the polymer dispersion may comprise 20 wt% to 100 wt% amino acids, 0 wt% to 80 wt% polysaccharide-based polymer, 0 wt% to 25 wt% weathering-reducing additive, and 0 wt% to 80 wt% filler, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive used in the polymer dispersion may comprise 50 wt% to 100 wt% amino acids, 0 wt% to 50 wt% polysaccharide-based polymer, 0 wt% to 25 wt% weathering-reducing additive, and 0 wt% to 50 wt% filler, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive used in the polymer dispersion may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% polysaccharide-based polymer, 0 wt% to 25 wt% weathering-reducing additive, and 0 wt% to 10 wt% filler, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive used in the polymer dispersion formulation may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% an efflorescence-reducing additive, and 0 wt% to 10 wt% filler, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive used in the polymer dispersion may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% an efflorescence-reducing additive, and 0.1 wt% to 10 wt% filler, each based on the total dry weight of the amino acid additive. The sub-scopes and compositions detailed above apply to a wider range and each of the aforementioned amino acid additive compositions.

[0067] The amino acid additive may be present in the polymer dispersion in an amount ranging from 0.1 wt% to 10 wt% (or 0.1 wt% to 5 wt%, or 1 wt% to 7 wt%, or 5 wt% to 10 wt%) based on the total dry weight of the polymer dispersion. The amino acid additive may be included in the polymer dispersion in an amount sufficient to provide an amino acid concentration of 0.1 wt% to 10 wt% (or 0.1 wt% to 5 wt%, or 1 wt% to 7 wt%, or 5 wt% to 10 wt%) based on the total dry weight of the polymer dispersion.

[0068] Redispersible polymer powder formulations containing amino acid additives

[0069] This disclosure also relates to the use of the aforementioned amino acid additives in redispersible polymer powder formulations. Redispersible polymer powder formulations may contain the amino acid additives disclosed herein, redispersible polymer powder, and optionally other additives.

[0070] The amino acid additive used in redispersible polymer powder formulations may comprise 20 wt% to 100 wt% amino acids, 0 wt% to 80 wt% polysaccharide-based polymers, 0 wt% to 25 wt% efflorescence-reducing additives, and 0 wt% to 80 wt% fillers, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive used in redispersible polymer powder formulations may comprise 50 wt% to 100 wt% amino acids, 0 wt% to 50 wt% polysaccharide-based polymers, 0 wt% to 25 wt% efflorescence-reducing additives, and 0 wt% to 50 wt% fillers, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive used in a redispersible polymer powder formulation may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0 wt% to 25 wt% an efflorescence-reducing additive, and 0 wt% to 10 wt% filler, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive used in a redispersible polymer powder formulation may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% an efflorescence-reducing additive, and 0 wt% to 10 wt% filler, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive used in redispersible polymer powder formulations may comprise 50 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% an efflorescence reducer, and 0.1 wt% to 10 wt% a filler, each based on the total dry weight of the amino acid additive. The sub-scopes and compositions detailed above apply to a wider range and each of the aforementioned amino acid additive compositions.

[0071] Amino acid additives may be present in redispersible polymer powder formulations in an amount ranging from 0.1 wt% to 10 wt% (or 0.1 wt% to 5 wt%, or 1 wt% to 7 wt%, or 5 wt% to 10 wt%) of the total dry weight of the redispersible polymer powder formulation. Amino acid additives may be included in redispersible polymer powder formulations in an amount sufficient to provide an amino acid concentration of 0.1 wt% to 10 wt% (or 0.1 wt% to 5 wt%, or 1 wt% to 7 wt%, or 5 wt% to 10 wt%) of the total dry weight of the redispersible polymer powder formulation.

[0072] Redispersible polymer powders are typically polymer emulsions that have been converted into powders, such that when mixed with water or other suitable solvents, the powders are redispersed into polymer emulsions with substantially the same properties (e.g., colloidal size).

[0073] The main components of the redispersible polymer powder may include a polymer, an emulsifier, and optionally an emulsion stabilizer. Other additives used to manufacture the polymer emulsion may be retained after the redispersible polymer powder is formed. The other additives are preferably 2 wt% or less (1 wt% or less, or 0.01 wt% to 0.5 wt%) accumulated on the total dry weight of the redispersible polymer powder.

[0074] The polymer is a polymer polymerized via emulsion polymerization. Examples of polymers that can be redispersible polymer powders may include, but are not limited to, poly(vinyl acetate), ethylene-vinyl acetate copolymers, ethylene-vinyl acetate-vinyl tert-carbonate copolymers, ethylene-vinyl acetate (meth)acrylate copolymers, ethylene-vinyl acetate-vinyl chloride copolymers, vinyl acetate-vinyl tert-carbonate copolymers, vinyl acetate-vinyl tert-carbonate (meth)acrylate copolymers, vinyl tert-carbonate (meth)acrylate copolymers, styrene-acrylate copolymers, styrene-butadiene copolymers, the like, and any combination thereof.

[0075] The polymer may be present in the redispersible polymer powder in an amount ranging from 50 wt% to 99.99 wt% (or 50 wt% to 75 wt%, or 60 wt% to 85 wt%, or 70 wt% to 95 wt%, or 90 wt% to 99 wt%, or 95 wt% to 99 wt%, or 98 wt% to 99.99 wt%) based on the total dry weight of the redispersible polymer powder.

[0076] Emulsifiers can be anionic, nonionic, cationic, or amphoteric. Examples of emulsifiers include, but are not limited to, alkyl sulfonates, alkyl aryl sulfonates, alkyl sulfates, sulfates of hydroxyalcanols, alkyl sulfonates, alkyl aryl disulfonates, sulfonated fatty acids, sulfates of polyethoxylated alkanols, phosphates of polyethoxylated alkanols, sulfates of alkylphenols, phosphates of alkylphenols, esters of sulfosuccinic acid, quaternary alkylammonium salts, quaternary alkylphosphonium salts, polyalkoxylated compounds (e.g., adducts of ethylene oxide and / or propylene oxide per mole of straight-chain and / or branched alkanols), alkylphenols, higher fatty acids, higher fatty acid amines, primary and / or secondary alkylamines, analogs, and any combination thereof. Unless otherwise stated, the aforementioned alkyl groups can be C6- to C22-alkyl, preferably C8- to C22-alkyl.

[0077] Examples of emulsion stabilizers may include, but are not limited to, polyvinyl alcohol, partially saponified polyvinyl alcohol, polyvinylpyrrolidone, analogues, and any combination thereof.

[0078] The particles of the redispersible polymer powder may have an average particle size (based on number distribution) of at least 10 µm (or 10 µm to 200 µm, or 50 µm to 150 µm, or 100 µm to 200 µm).

[0079] The redispersible polymer powder may be present in the redispersible polymer powder formulation in an amount ranging from 50 wt% to 99.99 wt% (or 50 wt% to 75 wt%, or 60 wt% to 85 wt%, or 70 wt% to 95 wt%, or 90 wt% to 99 wt%, or 95 wt% to 99 wt%, or 98 wt% to 99.99 wt%) of the total dry weight of the redispersible polymer powder formulation.

[0080] Redispersible polymer powders can be produced from emulsions having a solids content of 30 wt% to 70 wt% (or 40 wt% to 60 wt%) based on the total weight of the emulsion.

[0081] Redispersible polymer powders can be produced by drying emulsions (e.g., spray drying, freeze drying, fluidized bed drying, drum drying, rapid drying, similar operations, and any combination thereof). For example, spray drying can be carried out in conventional spray drying equipment, where atomization can be achieved by means of single-fluid, two-fluid, or multi-fluid nozzles or rotary disc atomizers. Typically, air, nitrogen, or nitrogen-enriched air can be used as the drying gas, and the inlet temperature of the drying gas is generally not more than 200°C. This inlet temperature is preferably 110°C to 180°C (or 140°C to 170°C). The outlet temperature can typically be set in the range of 45°C to 120°C (or 60°C to 90°C), depending on the equipment, the glass transition temperature (Tg) of the polymer, and the desired degree of dryness.

[0082] Examples of other additives may include, but are not limited to, suspending agents, thickeners, separating agents, penetrants, wetting agents, thermal gelling agents, sizing agents, defoamers, foam inhibitors, foaming agents, colorants, oxidation inhibitors, quenchers, antimicrobial agents, dispersants, antistatic agents, crosslinking agents (to improve wet strength), dispersants, lubricants, plasticizers, pH adjusters, flow conditioners, coagulation accelerators, waterproofing agents, analogues, and any combination thereof.

[0083] When present, each other additive may be present individually in redispersible polymer powder formulations at 0.01 wt% to 2 wt% (or 0.01 wt% to 0.5 wt%, or 0.1 wt% to 1 wt%, or 0.5 wt% to 2 wt%). The cumulative amount of other additives in redispersible polymer powder formulations may be 0 wt% to 5 wt% (or 0 wt% to 1 wt%, or 0.1 wt% to 3 wt%, or 1 wt% to 5 wt%).

[0084] Redispersible polymer powder formulations can be produced by mixing redispersible polymer powder with amino acid additives and optionally other additives, each in a dry form. Alternatively, the amino acid additives and optionally other additives can be added to an emulsion and then dried (e.g., via spray drying, freeze drying, fluidized bed drying, drum drying, rapid drying, similar operations, and any combination thereof). In another alternative method for producing redispersible polymer powder formulations, a portion of the amino acid additives and / or optionally other additives can be added to an emulsion and then dried. The resulting dry powder can be mixed with the remaining portion of the amino acid additives and / or optionally other additives.

[0085] Redispersible polymer powder formulations can be used in a variety of applications, including building materials.

[0086] Building materials containing amino acid additives

[0087] This disclosure also relates to the use of the aforementioned amino acid additives in building materials, which can advantageously have improved settling time. Non-limiting examples of such building materials may include tile adhesives, insulating mortars, leveling compounds, repair mortars, gypsum and / or lime and / or cement plaster, joint mortars, sealants, leveling putty, wallpaper paste, parquet flooring adhesives, adhesives, powder coatings, waterproof mortars, membranes, external thermal insulation composite systems (ETICS), tile grouts, the like, and any combinations thereof.

[0088] Building materials may include the amino acid additives disclosed herein, redispersible polymer powders, and binders and optional additives.

[0089] Amino acid additives can be incorporated into building formulations either as amino acid additives or as part of redispersible polymer powder formulations. For example, amino acid additives (e.g., dried or dispersed in a solvent (e.g., water)) can be added directly to building formulations. In another example, redispersible polymer powder formulations containing amino acid additives can be prepared as described herein. The powder (e.g., dried or dispersed in a solvent (e.g., water)) can then be incorporated into the building formulation in combination with other components of the building formulation. The incorporation of such building formulations and redispersible polymer powder formulations (in powder or redispersible form) is described in WO 2021 / 152169, the entire contents of which are incorporated herein by reference.

[0090] The amino acid additive used in building materials may comprise 20 wt% to 100 wt% amino acids, 0 wt% to 80 wt% polysaccharide-based polymers, 0 wt% to 25 wt% weathering-reducing additives, and 0 wt% to 80 wt% fillers, each based on the total dry weight of the amino acid additive. In another example, the amino acid additive used in building materials may comprise 50 wt% to 100 wt% amino acids, 0 wt% to 50 wt% polysaccharide-based polymers, 0 wt% to 25 wt% weathering-reducing additives, and 0 wt% to 50 wt% fillers, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive used in building materials may comprise 20 wt% to 100 wt% amino acids, 1 wt% to 50 wt% polysaccharide-based polymers, 0 wt% to 25 wt% weathering-reducing additives, and 0 wt% to 10 wt% fillers, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive used in building materials may comprise 20 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% a weathering-reducing additive, and 0 wt% to 50 wt% filler, each based on the total dry weight of the amino acid additive. In yet another example, the amino acid additive used in building materials may comprise 20 wt% to 100 wt% amino acids, 1 wt% to 50 wt% a polysaccharide-based polymer, 0.1 wt% to 25 wt% a weathering-reducing additive, and 0.1 wt% to 50 wt% filler, each based on the total dry weight of the amino acid additive. The sub-scopes and compositions detailed above apply to a wider range and each of the aforementioned amino acid additive compositions.

[0091] Amino acid additives may be present in building preparations in an amount ranging from 0.01 wt% to 2 wt% (or 0.01 wt% to 0.1 wt%, or 0.05 wt% to 1 wt%, or 0.1 wt% to 2 wt%) based on the total dry weight of the building preparation. Amino acid additives may be included in building preparations in an amount sufficient to provide an amino acid concentration of 0.01 wt% to 2 wt% (or 0.01 wt% to 0.1 wt%, or 0.05 wt% to 1 wt%, or 0.1 wt% to 2 wt%) based on the total dry weight of the building preparation.

[0092] The redispersible polymer powder may be present in the building formulation in an amount ranging from 0.1 wt% to 25 wt% (or 0.1 wt% to 5 wt%, or 1 wt% to 15 wt%, or 5 wt% to 25 wt%) based on the total dry weight of the building formulation. The redispersible polymer powder formulation may be included in the building formulation in an amount sufficient to provide a redispersible polymer powder concentration of 0.1 wt% to 25 wt% (or 0.01 wt% to 1 wt%, or 0.1 wt% to 5 wt%, or 1 wt% to 15 wt%, or 5 wt% to 25 wt%) based on the total dry weight of the building formulation. Redispersible polymer powder formulations containing amino acid additives may be included in building formulations in amounts sufficient to provide a redispersible polymer powder concentration of 0.1 wt% to 25 wt% (or 0.01 wt% to 1 wt%, or 0.1 wt% to 5 wt%, or 1 wt% to 15 wt%, or 5 wt% to 25 wt%) and an amino acid concentration of 0.01 wt% to 2 wt% (or 0.01 wt% to 0.1 wt%, or 0.05 wt% to 1 wt%, or 0.1 wt% to 2 wt%), each based on the total dry weight of the building formulation.

[0093] Building materials may contain inorganic binders. Inorganic binders are inorganic compounds that hold solid particles together as a cohesive whole. Examples of inorganic binders may include, but are not limited to, hydraulic setting binders, potential hydraulic binders, pozzolanic binders, non-hydraulic binders, the like, and any combination thereof.

[0094] Hydraulic setting binders set in the presence of water and include cement. Examples of hydraulic setting binders may include, but are not limited to, Portland cement (e.g., CEM I, EN 197-1), blends of Portland cement (e.g., CEM II, CEM III, CEM IV, and / or CEM V (EN 197-1)), aluminate cement, calcium aluminate cement (CAC), calcium sulfoaluminate cement (CSA), fly ash, calcium phosphate cement, the like, and any combination thereof.

[0095] Potential hydraulic binders harden by adding an activator (typically lime and water). Examples of potential hydraulic binders may include, but are not limited to, fly ash, silica-calcium cement, blast furnace slag, the like, and any combination thereof.

[0096] Volcanic ash binders are siliceous or aluminosilicate compounds, or combinations thereof. Volcanic ash binders harden in the presence of dissolved Ca(OH)₂. Examples of volcanic ash binders may include, but are not limited to, microsilica (also known as silica fume), metakaolin, vitrified aluminosilicate (VCAS), ground recycled glassy volcanic ash, sintered shale, diatomaceous earth, molasses, rice husk ash, air-cooled slag, calcium metasilicate, volcanic slag, volcanic tuff, volcanic ash, tuff (trass), analogues, and any combination thereof.

[0097] Non-hydraulic inorganic binders do not harden in the presence of excess water. Examples of non-hydraulic inorganic binders may include, but are not limited to, calcium sulfate hemihydrate, anhydrite, quicklime, hydrated lime, magnesia cement, the like, and any combination thereof.

[0098] Inorganic binders may be present in building materials in an amount ranging from 5 wt% to 99 wt% (or 5 wt% to 40 wt%, or 25 wt% to 60 wt%, or 45 wt% to 75 wt%, or 60 wt% to 80 wt%, or 75 wt% to 95 wt%, or 80 wt% to 99 wt%) based on the total dry weight of the building materials.

[0099] Building materials may optionally contain one or more additives. Examples of additives used in building materials may include, but are not limited to, fillers, hydrophobic additives, superplasticizers, biocides, pigments, defoamers, analogs, and any combination thereof.

[0100] Examples of fillers may include, but are not limited to, quartz sand, marble sand, calcium carbonate, limestone, dolomite, basalt, perlite, vermiculite, clay, hydrated lime, silica sand, chalk, talc, mica, fumed silica, polystyrene particles, rubber particles, and mixtures thereof.

[0101] When included, filler may be present in the building composition in an amount ranging from 1 wt% to 95 wt% (or 1 wt% to 20 wt%, or 10 wt% to 30 wt%, or 20 wt% to 40 wt%, or 30 wt% to 50 wt%, or 40 wt% to 70 wt%, or 50 wt% to 80 wt%, or 60 wt% to 95 wt%) based on the total dry weight of the building composition. The building composition may be filler-free.

[0102] Examples of thickeners may include, but are not limited to, starch, starch ethers, cellulose ethers, guar gum ethers, vilan gum, inorganic thickeners (e.g., clay), analogs, and any combination thereof. Cellulose ethers and guar gum ethers are preferred and include alkyl ethers, hydroxyalkyl ethers, and / or carboxymethyl ethers. Suitable alkyl groups include methyl, ethyl, propyl, and / or C4- to C30-alkyl groups. Suitable hydroxyalkyl groups include hydroxyethyl and / or hydroxypropyl groups. Cellulose ethers or guar gum ethers have the additional advantage that they can further help control mortar properties, including water requirement, workability, setting time, and water retention during mortar application.

[0103] When included, the thickener may be present in the building preparation in an amount ranging from 0.1 wt% to 10 wt% (or 0.1 wt% to 3 wt%, or 1 wt% to 5 wt%, or 3 wt% to 7 wt%, or 5 wt% to 10 wt%) based on the total dry weight of the building preparation. The building preparation may be free of the thickener.

[0104] Hydrophobic additives provide curing mortars with protection against high surface tension fluids, particularly water. Suitable hydrophobic additives include organosilicon compounds such as alkyl-trialkoxysilanes and / or dialkyldialkoxysilanes. Examples of suitable alkyl groups include C6 to C12 alkyl groups. Examples of suitable alkoxy groups include methoxy, ethoxy, propoxy, and / or butoxy groups. Other suitable hydrophobic additives may be selected from fatty acids, fatty acid salts, and fatty acid derivatives.

[0105] When included, the hydrophobic additive may be present in the building composition in an amount ranging from 0.01 wt% to 10 wt% (or 0.01 wt% to 3 wt%, or 1 wt% to 5 wt%, or 3 wt% to 7 wt%, or 5 wt% to 10 wt%) based on the total dry weight of the building composition. The building composition may be free of the hydrophobic additive.

[0106] Superplasticizers enable the production of cement, mortar, and other materials with low moisture content, up to 40%. Suitable superplasticizers include naphthalene and / or naphthalene-based superplasticizers, melamine and / or melamine-based superplasticizers, lignin sulfonates, and polycarboxylic acids.

[0107] When included, superplasticizers may be present in building compositions in an amount ranging from 0.01 wt% to 10 wt% (or 0.01 wt% to 3 wt%, or 1 wt% to 5 wt%, or 3 wt% to 7 wt%, or 5 wt% to 10 wt%) based on the total dry weight of the building composition. Building compositions may be free of superplasticizers.

[0108] The building preparations disclosed herein may further comprise solvents (e.g., water, methanol, ethanol, the like, and any combination thereof). When solvents are used, the building preparations may have a solids content of 30 wt% to 90 wt% (or 30 wt% to 70 wt%, or 40 wt% to 80 wt%, or 50 wt% to 90 wt%, or 60 wt% to 90 wt%).

[0109] The adhesive properties of building materials can be characterized by adhesive tensile strength relative to curing time (EN 12004, after 28 days of curing at 23°C ± 2°C and 50% ± 5% relative humidity). Preferably, the building materials described herein have an E classification according to EN 12004, which has a tensile strength greater than 0.5 N / mm² after a 30-minute curing time. 2 The adhesive tensile strength. Building formulations containing the amino acid additives disclosed herein can retain 0.5 N / mm² after a drying time of 30 minutes or longer. 2 Or greater (or 0.5 N / mm) 2 Or larger, or 0.6 N / mm 2 Or larger, or 0.7 N / mm 2 Or larger, or 0.8 N / mm 2 Or larger, or 0.9 N / mm 2 Or larger, or 1.0 N / mm 2 Or larger, or 0.5 N / mm 2 Up to 1.5 N / mm 2 0.6 N / mm 2 Up to 1.5 N / mm 2 0.7 N / mm 2 Up to 1.5 N / mm 2 0.8 N / mm 2 Up to 1.5 N / mm 2 0.9 N / mm 2 Up to 1.5 N / mm 2 1.0 N / mm 2 Up to 1.5 N / mm 2 The adhesive tensile strength of the building materials containing the amino acid additives disclosed herein can maintain 0.5 N / mm². 2 Or greater adhesive tensile strength, wherein the drying time is 30 minutes or longer (40 minutes or longer, 50 minutes or longer, 60 minutes or longer, 70 minutes or longer, 80 minutes or longer, or 30 minutes to 120 minutes or longer, 40 minutes to 120 minutes or longer, 50 minutes to 120 minutes or longer, 60 minutes to 120 minutes or longer, 70 minutes to 120 minutes or longer, 80 minutes to 120 minutes or longer).

[0110] Compared to comparable building materials (the same building materials but without amino acid additives), the use of amino acid additives can extend the curing time of building materials (e.g., cement-based tile adhesives) until the bond tensile strength drops below 0.5 N / mm². 2 The time should be increased by at least 5 minutes (or at least 10 minutes, or 5 to 30 minutes or longer).

[0111] Compared to comparable building materials, the use of amino acid additives can increase the bond tensile strength of building materials (e.g., cement-based tile adhesives) by at least 10% (or at least 15%, or 10% to 80%) after a 30-minute settling time.

[0112] Compared to comparable building materials, the use of amino acid additives can improve the wetting of ceramic tiles with building materials (e.g., cement-based tile adhesives), wherein the surface area wetted after a 20-minute settling time is at least 5% (or at least 10%, or 5% to 80%) or more of the surface area.

[0113] Compared to comparable building materials, the use of amino acid additives can increase the processing time of building materials (e.g., cement plaster and / or cement-based plaster in composite insulation systems) by at least 5 minutes (or at least 10 minutes, or 5 to 30 minutes).

[0114] Test methods

[0115] Particle size distribution measurement: Particle size distribution can be measured using a Mastersizer 3000 laser diffractometer from Malvern. The diluted sample can be pretreated with sonication for 30 seconds prior to measurement. The sample is preferably measured at a dilution of approximately 0.05 g / L (8% opacity), normal sensitivity, all lens ranges, and a refractive index of 1.456. The particle type is non-spherical, and the material properties are RI = polymer and AI = 0.005.

[0116] The average and ratio of the volume- and quantity-weighted distributions (d) w d w / d n The samples are characterized. Unless otherwise stated, the mean is based on a quantity-weighted distribution.

[0117] Solid content: The solid content can be measured by drying 1 to 2 grams of the aqueous dispersion at 105°C for 4 hours and then dividing the weight of the dried material by the weight of the dispersion.

[0118] Setting time: Setting time can be measured according to EN 12004-2. In short, a thin layer of the sample is applied to the concrete slab using a straight-edged trowel. A thicker layer is then added using a notched trowel with 6 mm × 6 mm notches and combed into stripes. After the desired setting time (e.g., 5 minutes, 10 minutes, 20 minutes, and 30 minutes), a 5 cm × 5 cm porous ceramic tile is placed on the adhesive while a 2 kg load is applied for 30 seconds. After storage for 27 days at 23°C ± 2°C and 50% ± 5% relative humidity, the pull-out head is bonded to the tile with a suitable high-strength adhesive (e.g., epoxy adhesive). Tensile adhesion strength is measured after an additional 24 hours of storage. Typically, a C2 classification requires 0.5 N / mm² after a 20-minute setting time. 2 The tensile adhesion strength, and the C2E classification requires 0.5 N / mm² after a 30-minute drying time. 2 The tensile adhesion strength.

[0119] Wettability: The wettability of the tile adhesive can be measured according to EN 12004-2. In short, after the desired curing time (e.g., 5 minutes, 10 minutes, 20 minutes, and 30 minutes), stoneware tiles (5 cm × 5 cm) are laid into a mortar bed (applied according to EN 12004-2) and subjected to a 2 kg load for 30 seconds. The tiles are then removed from the mortar bed, and the wettability of the back side of the tile is measured and reported as a percentage of surface area unless otherwise specified.

[0120] Unless otherwise indicated, all numerical values ​​representing the amount, characteristics (e.g., molecular weight), reaction conditions, etc., of components used in this disclosure and related claims should be understood to be modified by the term "about" in all cases. At least, and not intended to limit the application of the doctrine of equivalence to the scope of the claims, the term "about" with respect to each numerical parameter should be interpreted at least based on the number of significant figures reported and the use of ordinary rounding techniques.

[0121] Listing or describing concentration ranges as available, suitable, etc., is intended to indicate that any and every concentration (including endpoints) within that range is considered to have been stated. For example, a range “from 1 to 10” or “1 to 10” should be interpreted as indicating every possible value within a continuous interval between approximately 1 and approximately 10. Therefore, even if specific data points within that range are explicitly identified, or even if no data points within that range are explicitly identified or only a few specific data points are mentioned, it should be understood that the inventors acknowledge and understand that any and all data points within that range should be considered specified, and that the inventors have mastered the entire range and all points within that range.

[0122] The term "and / or" refers to both an inclusive "and" case and an exclusive "or" case, and is used herein for the sake of brevity. For example, a mixture containing acetic acid and / or methyl acetate may contain acetic acid alone, methyl acetate alone, or both acetic acid and methyl acetate.

[0123] The use of "and" to connect items in a list after "one or more of..." or "at least one of..." is intended to be alternative or combined, rather than separate. For example, "at least one of A, B, and C" and "one or more of A, B, and C" are each considered to disclose embodiments of a single A, a single B, a single C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of all three of A, B, and C.

[0124] Unless otherwise specified, the room temperature is 25°C and the atmospheric pressure is 101.325 kPa.

[0125] Although these compositions, systems, and methods are described herein with the phrase “comprising / including” different components or steps, they may also be described as “consistent primarily of these different components and steps” or “composed of these different components and steps”.

[0126] This document describes illustrative embodiments of the invention. For clarity, not all features of actual implementations are described in this specification. It will be understood, of course, that in the development of any such actual implementation, many implementation-specific decisions must be made to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, which will vary from implementation to implementation. Furthermore, it will be understood that such development work can be complex and time-consuming, but remains a routine task for those skilled in the art who will benefit from this disclosure.

[0127] Example Implementation

[0128] Example 1. A building composition comprising: an inorganic binder; a redispersible polymer powder or polymer dispersion; and an amino acid additive containing amino acids, comprising 0.01 wt% to 2 wt% of the total dry weight of the building composition; wherein the building composition has a density greater than 0.5 N / mm² after a 30-minute drying time. 2 The adhesive tensile strength (EN 12004, after curing for 28 days at 23°C±2°C and 50%±5% relative humidity), and optionally, wherein the adhesive tensile strength after a 30-minute drying time is at least 10% greater than that of comparable building materials without amino acids.

[0129] Example 2. The building preparation as described in Example 1, wherein the amino acid is present at 0.01 wt% to 1 wt% based on the total dry weight of the building preparation.

[0130] Example 3. A building compound as described in any of the preceding examples, wherein the amino acid additive further comprises one or more of the following: a polysaccharide-based polymer, a weathering reducer, a filler, and any combination thereof.

[0131] Example 4. A building compound as described in any of the preceding examples, wherein the amino acid additive comprises: 20 wt% to 100 wt% of amino acids based on the total dry weight of the amino acid additive; 0 wt% to 80 wt% of a polysaccharide-based polymer based on the total dry weight of the amino acid additive; 0 wt% to 25 wt% of a weathering-reducing additive based on the total dry weight of the amino acid additive; and 0 wt% to 80 wt% of a filler based on the total dry weight of the amino acid additive, wherein at least two of the polysaccharide-based polymer, the weathering-reducing additive, and the filler are present.

[0132] Example 5. A building composition as described in any of the preceding examples, wherein the redispersible polymer is present in the building composition at a concentration of 0.01 wt% to 25 wt% based on the total dry weight of the building composition.

[0133] Example 6. A building component as described in any of the preceding examples, wherein the inorganic binder comprises one or more of the following: a hydraulic setting binder, a potential hydraulic binder, a pozzolanic binder, and a non-hydraulic binder.

[0134] Example 7. A building component as described in any of the preceding examples, wherein the building component is one of the following: tile adhesive, thermal insulation mortar, leveling compound, repair mortar, gypsum and / or lime and / or cement plaster, joint mortar, sealant, leveling putty, wallpaper paste, parquet flooring adhesive, adhesive, powder coating, waterproof mortar, membrane material, external insulation composite system, and tile grout.

[0135] Example 8. A building preparation as described in any of the preceding examples, further comprising a solvent and having a solids content of 30 wt% to 90 wt%.

[0136] Example 9. A building component as described in any of the preceding examples, wherein the adhesive tensile strength of the building component is 0.5 N / mm² after a 50-minute drying time. 2 Or larger.

[0137] Example 10. A building composition as described in any of the preceding examples, wherein the inorganic binder is present at 5 wt% to 99 wt% of the total dry weight of the building composition, and wherein the redispersible polymer powder is present at 0.01 wt% to 25 wt% of the total dry weight of the building composition.

[0138] Example 11. A building composition as described in any of the preceding examples, further comprising 1 wt% to 95 wt% of filler based on the total dry weight of the building composition.

[0139] Example 12. Use of amino acids to increase the settling time of building materials (e.g., cement-based tile adhesives).

[0140] Example 13. Use as described in Example 12, wherein the airing time is increased by at least 5 minutes relative to comparable building preparations that do not contain the amino acid.

[0141] Example 14. Use as described in Example 12 or 13, wherein the amino acid is present at 0.01 wt% to 1 wt% of the total dry weight of the building preparation.

[0142] Example 15. Use of amino acids to improve the wetting of ceramic tiles with building formulations (e.g., cement-based tile adhesives).

[0143] Example 16. Use as described in Example 15, wherein the wetted surface area is at least 5% larger than that of comparable building materials that do not contain amino acids after a 20-minute drying time.

[0144] Example 17. Use as described in Example 15 or 16, wherein the amino acid is present at 0.01 wt% to 1 wt% of the total dry weight of the building preparation.

[0145] Example 18. Use of amino acids to increase the processing time of building materials (e.g., cement plaster and / or cement-based plaster in composite insulation systems).

[0146] Example 19. Use as described in Example 18, wherein the processing time is increased by at least 5 minutes relative to comparable building preparations that do not contain amino acids.

[0147] Example 20. Use as described in Example 18 or 19, wherein the amino acid is present at 0.01 wt% to 1 wt% of the total dry weight of the building preparation.

[0148] Example 21. A redispersible polymer powder formulation comprising: 90 wt% to 99.9 wt% of redispersible polymer powder based on the total dry weight of the redispersible polymer powder formulation; and 0.1 wt% to 10 wt% of an amino acid additive containing amino acids based on the total dry weight of the redispersible polymer powder formulation.

[0149] Example 22. A redispersible polymer powder formulation as described in Example 21, wherein the amino acid additive comprises: 20 wt% to 100 wt% of amino acids based on the total dry weight of the amino acid additive; 0 wt% to 80 wt% of a polysaccharide-based polymer based on the total dry weight of the amino acid additive; and 0 wt% to 25 wt% of an efflorescence-reducing additive based on the total dry weight of the amino acid additive.

[0150] Example 23. A redispersible polymer powder formulation as described in any one of Examples 21-22, wherein the amino acid is present at 0.1 wt% to 10 wt% based on the total dry weight of the redispersible polymer powder formulation.

[0151] Example 24. A redispersible polymer powder formulation as described in any one of Examples 21-23, wherein the redispersible polymer powder comprises one or more of the following polymers: poly(vinyl acetate), ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl tert-carbonate copolymer, ethylene-vinyl acetate (meth)acrylate copolymer, ethylene-vinyl acetate-vinyl chloride copolymer, vinyl acetate-vinyl tert-carbonate copolymer, vinyl acetate-vinyl tert-carbonate (meth)acrylate copolymer, vinyl tert-carbonate (meth)acrylate copolymer, styrene-acrylate copolymer, and styrene-butadiene copolymer.

[0152] Example 25. A redispersible polymer powder formulation as described in any one of Examples 21-24, wherein the redispersible polymer powder has an average particle size (based on number distribution) of 10 μm or larger (e.g., 10 μm to 200 μm).

[0153] Example 26. A polymer dispersion formed by free radical emulsion polymerization, the polymer dispersion comprising: a polymer; and 0.1 wt% to 10 wt% of an amino acid additive.

[0154] Example 27. A polymer dispersion as described in Example 26, wherein the polymer comprises one or more of the following: poly(vinyl acetate), ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl tert-carbonate copolymer, ethylene-vinyl acetate (meth)acrylate copolymer, ethylene-vinyl acetate-vinyl chloride copolymer, vinyl acetate-vinyl tert-carbonate copolymer, vinyl acetate-vinyl tert-carbonate (meth)acrylate copolymer, vinyl tert-carbonate (meth)acrylate copolymer, styrene-acrylate copolymer, and styrene-butadiene copolymer.

[0155] Example 28. A polymer dispersion as described in Example 26, wherein the polymer comprises 60 wt% to 96 wt% vinyl acetate and 4 wt% to 40 wt% ethylene.

[0156] Example 29. A polymer dispersion as described in any one of Examples 26-28, further comprising: a stabilizer, preferably a polyvinyl alcohol having a degree of hydrolysis of 80 mol% to 98 mol% and a Heppler viscosity of 2 to 30 mPa·s, more preferably a polyvinyl alcohol having a degree of hydrolysis of 86 mol% to 90 mol% and a Heppler viscosity of 2 to 6 mPa·s.

[0157] Example 30. A polymer dispersion as described in any one of Examples 26-29, wherein the amino acid additive comprises: 20 wt% to 100 wt% of amino acids based on the total dry weight of the amino acid additive; 0 wt% to 80 wt% of a polysaccharide-based polymer based on the total dry weight of the amino acid additive; and 0 wt% to 25 wt% of a weathering-reducing additive based on the total dry weight of the amino acid additive.

[0158] Example 31. An amino acid additive comprising: 50 wt% to 99 wt% of amino acids based on the total dry weight of the amino acid additive; and 1 wt% to 50 wt% of a polysaccharide-based polymer based on the total dry weight of the amino acid additive.

[0159] Example 32. An amino acid additive as described in Example 31, further comprising: 0.1 wt% to 25 wt% of a weathering-reducing additive based on the total dry weight of the amino acid additive.

[0160] Example 33. An amino acid additive as described in any one of Examples 31-32, further comprising: 0.1 wt% to 10 wt% of filler based on the total dry weight of the amino acid additive.

[0161] The invention will be better understood in the following non-limiting examples.

[0162] Example

[0163] Building materials were prepared according to Table 3 using the dry mortar formulations in Table 1 and the glycine additives (i.e., amino acid additives) in Table 2. Table 1 - Dry Mortar Preparations Hydrophobic cellulose fibers are available from CFF GmbH & Co. Redispersible binders based on vinyl acetate and ethylene copolymers are available from Celanese. Semi-flexible redispersible polymer powders based on vinyl acetate and ethylene tert-carbonate copolymers are available from Celanese Corporation. Table 2 - Glycine Additive Formulations Table 3 - Building Materials The CF-1-CF-5 slurry is prepared by mixing 100 parts by weight of the listed dry components with 33 parts by weight of water. The CF-6-CF-8 slurry is prepared by mixing 100 parts by weight of the listed dry components with 35 parts by weight of water.

[0164] After curing for 28 days at 23°C±2°C and 50%±5% relative humidity, the adhesive properties of the building materials, especially the curing time, were measured according to EN 12004, see Table 4. Table 4 - Adhesive properties of building materials NM = Not measured

[0165] In each of these examples, the inclusion of glycine increases adhesion strength over longer drying times, which improves the adhesion of the building materials to tiles and other structures. Preferred building materials (Class E) exhibit adhesion strength greater than 0.5 N / mm² over 30 minutes. 2 The adhesive tensile strength. The samples of this invention achieve this, and in some cases retain the said adhesive tensile strength after 50 and 60 minutes.

[0166] Table 5 reports the wetting of each building compound. The control mortar (CF-1) showed 30% wetting after 30 minutes and 5% wetting after 40 minutes. Surprisingly, the product of the present invention (CF-3) showed a significantly greater wetting of 80% after 30 minutes and 40% wetting after 40 minutes. Table 5 - Wetting under different drying times .

Claims

1. A building component comprising: Inorganic binders; Redispersible polymer powders or polymer dispersions; and Based on the total dry weight of the building materials, 0.01 wt% to 2 wt% of amino acid additives containing amino acids; The building components exhibited a strength greater than 0.5 N / mm² after a 30-minute airing period. 2 The adhesive tensile strength (EN12004, after curing for 28 days at 23°C±2°C and 50%±5% relative humidity), and Compared to comparable building materials that do not contain amino acids, the adhesive tensile strength after a 30-minute drying time is at least 10% greater.

2. The building components as described in claim 1, wherein, The amino acid is present at 0.01 wt% to 1 wt% of the total dry weight of the building preparation.

3. The building accessories as described in any of the preceding claims, wherein, The amino acid additive further comprises one or more of the following: polysaccharide-based polymers, weathering reducers, fillers, and any combination thereof.

4. The building accessories as described in any of the preceding claims, wherein, This amino acid additive contains: Based on the total dry weight of 20 wt% to 100 wt% amino acids in this amino acid additive; Polysaccharide-based polymers based on the total dry weight of the amino acid additive, ranging from 0 wt% to 80 wt%. Weathering reduction additives based on the total dry weight of the amino acid additives, ranging from 0 wt% to 25 wt%; and The filler comprises 0 wt% to 80 wt% of the total dry weight of the amino acid additive, wherein the polysaccharide-based polymer, the weathering-reducing additive, and at least two of the filler are present.

5. The building accessories as claimed in any of the preceding claims, wherein, The redispersible polymer is present in the building preparation at a concentration of 0.01 wt% to 25 wt% based on the total dry weight of the building preparation.

6. The building accessories as described in any of the preceding claims, wherein, The inorganic binder comprises one or more of the following: hydraulic setting binder, potential hydraulic binder, pozzolanic binder, and non-hydraulic binder.

7. The building accessories as described in any of the preceding claims, wherein, The building materials are one of the following: tile adhesives, thermal insulation mortars, leveling compounds, repair mortars, gypsum and / or lime and / or cement plaster, joint mortars, sealants, leveling putty, wallpaper paste, parquet flooring adhesives, adhesives, powder coatings, waterproof mortars, membranes, external insulation composite systems, and tile grouts.

8. The building preparation as claimed in any of the preceding claims, further comprising a solvent and having a solids content of 30 wt% to 90 wt%.

9. The building accessories as claimed in any of the preceding claims, wherein, After a 50-minute drying period, the adhesive tensile strength of the building component was 0.5 N / mm². 2 Or larger.

10. The building accessories as claimed in any of the preceding claims, wherein, The inorganic binder is present at 5 wt% to 99 wt% of the total dry weight of the building composition, and the redispersible polymer powder is present at 0.01 wt% to 25 wt% of the total dry weight of the building composition.

11. The building composition as claimed in any of the preceding claims, further comprising 1 wt% to 95 wt% of filler based on the total dry weight of the building composition.

12. The use of amino acids to increase the drying time of building materials, wherein the amino acid is preferably glycine.

13. The use as described in claim 12, wherein, Compared to comparable building materials that do not contain this amino acid, the airing time is increased by at least 5 minutes.

14. The use as described in claim 12 or 13, wherein, The amino acid is present at 0.01 wt% to 1 wt% of the total dry weight of the building preparation.

15. An amino acid for improving the wetting of ceramic bricks in building materials, wherein the amino acid is preferably glycine.

16. The use as described in claim 15, wherein, Compared to comparable building materials that do not contain amino acids, the surface area wetted after a 20-minute drying time is at least 5% larger.

17. The use as described in claim 15 or 16, wherein, The amino acid is present at 0.01 wt% to 1 wt% of the total dry weight of the building preparation.

18. Use of amino acids to increase the processing time of building materials, preferably wherein the amino acid is glycine.

19. The use as described in claim 18, wherein, Compared to comparable building materials that do not contain amino acids, this processing time increases by at least 5 minutes.

20. The use as described in claim 18 or 19, wherein, The amino acid is present at 0.01 wt% to 1 wt% of the total dry weight of the building preparation.

21. A redispersible polymer powder formulation comprising: The redispersible polymer powder formulation comprises 90 wt% to 99.9 wt% redispersible polymer powder by total dry weight; and The total dry weight of the redispersible polymer powder formulation contains 0.1 wt% to 10 wt% of an amino acid additive containing amino acids.

22. The redispersible polymer powder formulation of claim 21, wherein, This amino acid additive contains: Based on the total dry weight of 20 wt% to 100 wt% amino acids in this amino acid additive; Based on the total dry weight of the amino acid additive, a polysaccharide-based polymer of 0 wt% to 80 wt%; and Weathering reduction additives based on the total dry weight of the amino acid additives, ranging from 0 wt% to 25 wt%.

23. The redispersible polymer powder formulation according to any one of claims 21-22, wherein, The amino acid is present at 0.1 wt% to 10 wt% of the total dry weight of the redispersible polymer powder formulation.

24. The redispersible polymer powder formulation according to any one of claims 21-23, wherein, The redispersible polymer powder comprises one or more of the following polymers: poly(vinyl acetate), ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl tert-carbonate copolymer, ethylene-vinyl acetate (meth)acrylate copolymer, ethylene-vinyl acetate-vinyl chloride copolymer, vinyl acetate-vinyl tert-carbonate copolymer, vinyl acetate-vinyl tert-carbonate (meth)acrylate copolymer, vinyl tert-carbonate (meth)acrylate copolymer, styrene-acrylate copolymer, and styrene-butadiene copolymer.

25. The redispersible polymer powder formulation according to any one of claims 21-24, wherein, The redispersible polymer powder has an average particle size of 10 μm or larger (based on number distribution).

26. A polymer dispersion formed by free radical emulsion polymerization, the polymer dispersion comprising: polymers; and wt% to 10 wt% amino acid additives.

27. The polymer dispersion of claim 26, wherein, The polymer includes one or more of the following: poly(vinyl acetate), ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl tert-carbonate copolymer, ethylene-vinyl acetate (meth)acrylate copolymer, ethylene-vinyl acetate-vinyl chloride copolymer, vinyl acetate-vinyl tert-carbonate copolymer, vinyl acetate-vinyl tert-carbonate (meth)acrylate copolymer, vinyl tert-carbonate (meth)acrylate copolymer, styrene-acrylate copolymer, and styrene-butadiene copolymer.

28. The polymer dispersion of claim 26, wherein, The polymer contains 60 wt% to 96 wt% vinyl acetate and 4 wt% to 40 wt% ethylene.

29. The polymer dispersion of any one of claims 26-28, further comprising: The stabilizer comprises polyvinyl alcohol having a degree of hydrolysis of 80 mol% to 98 mol% and a Heppler viscosity of 2 to 30 mPa·s.

30. The polymer dispersion according to any one of claims 26-29, wherein, This amino acid additive contains: Based on the total dry weight of 20 wt% to 100 wt% amino acids in this amino acid additive; Based on the total dry weight of the amino acid additive, a polysaccharide-based polymer of 0 wt% to 80 wt%; and Weathering reduction additives based on the total dry weight of the amino acid additives, ranging from 0 wt% to 25 wt%.

31. An amino acid additive, comprising: Based on the total dry weight of 20 wt% to 99 wt% amino acids in this amino acid additive; and Polysaccharide-based polymers based on the total dry weight of the amino acid additive, ranging from 1 wt% to 80 wt%.

32. The amino acid additive of claim 31, further comprising: Weathering reduction additives based on the total dry weight of the amino acid additives, ranging from 0.1 wt% to 25 wt%.

33. The amino acid additive according to any one of claims 31-32, further comprising: Fillers based on the total dry weight of the amino acid additive, ranging from 0.1 wt% to 80 wt%.

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