CN115677257B - Green efficient gypsum retarder - Google Patents
Green efficient gypsum retarder Download PDFInfo
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- CN115677257B CN115677257B CN202211345196.9A CN202211345196A CN115677257B CN 115677257 B CN115677257 B CN 115677257B CN 202211345196 A CN202211345196 A CN 202211345196A CN 115677257 B CN115677257 B CN 115677257B
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- gypsum
- disuccinate
- ureido
- polyaspartate
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- 239000010440 gypsum Substances 0.000 title claims abstract description 90
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 90
- 239000011575 calcium Substances 0.000 claims abstract description 42
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 42
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 125000001951 carbamoylamino group Chemical group C(N)(=O)N* 0.000 claims abstract description 22
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- 229940061605 tetrasodium glutamate diacetate Drugs 0.000 claims abstract description 15
- UZVUJVFQFNHRSY-OUTKXMMCSA-J tetrasodium;(2s)-2-[bis(carboxylatomethyl)amino]pentanedioate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CC[C@@H](C([O-])=O)N(CC([O-])=O)CC([O-])=O UZVUJVFQFNHRSY-OUTKXMMCSA-J 0.000 claims abstract description 15
- 239000007864 aqueous solution Substances 0.000 claims description 40
- 239000000843 powder Substances 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 24
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 23
- 239000007787 solid Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- GIYMJJRYEFFRKQ-UHFFFAOYSA-K [Na+].[Na+].[Na+].CNCC(=O)[O-].CNCC(=O)[O-].CNCC(=O)[O-] Chemical compound [Na+].[Na+].[Na+].CNCC(=O)[O-].CNCC(=O)[O-].CNCC(=O)[O-] GIYMJJRYEFFRKQ-UHFFFAOYSA-K 0.000 claims description 7
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 5
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 5
- 239000000176 sodium gluconate Substances 0.000 claims description 5
- 229940005574 sodium gluconate Drugs 0.000 claims description 5
- 235000012207 sodium gluconate Nutrition 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 229920002197 Sodium polyaspartate Polymers 0.000 claims description 3
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 claims description 2
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 claims description 2
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 230000000979 retarding effect Effects 0.000 abstract description 10
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 abstract description 6
- KQSSATDQUYCRGS-UHFFFAOYSA-N methyl glycinate Chemical compound COC(=O)CN KQSSATDQUYCRGS-UHFFFAOYSA-N 0.000 abstract description 5
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- MLDWGLQSBBCMMO-UHFFFAOYSA-N [Na].[Na].[Na].CNCC(=O)O Chemical compound [Na].[Na].[Na].CNCC(=O)O MLDWGLQSBBCMMO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000701 coagulant Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 34
- 238000001694 spray drying Methods 0.000 description 21
- 238000009472 formulation Methods 0.000 description 12
- 238000007873 sieving Methods 0.000 description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- GXCLVBGFBYZDAG-UHFFFAOYSA-N N-[2-(1H-indol-3-yl)ethyl]-N-methylprop-2-en-1-amine Chemical compound CN(CCC1=CNC2=C1C=CC=C2)CC=C GXCLVBGFBYZDAG-UHFFFAOYSA-N 0.000 description 4
- 108010077895 Sarcosine Proteins 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- CVHZOJJKTDOEJC-UHFFFAOYSA-N saccharin Chemical compound C1=CC=C2C(=O)NS(=O)(=O)C2=C1 CVHZOJJKTDOEJC-UHFFFAOYSA-N 0.000 description 4
- 229940081974 saccharin Drugs 0.000 description 4
- 235000019204 saccharin Nutrition 0.000 description 4
- 239000000901 saccharin and its Na,K and Ca salt Substances 0.000 description 4
- FSYKKLYZXJSNPZ-UHFFFAOYSA-N sarcosine Chemical compound C[NH2+]CC([O-])=O FSYKKLYZXJSNPZ-UHFFFAOYSA-N 0.000 description 4
- DLTWOYCDRWJVIM-JEDNCBNOSA-M sodium;(2s)-2-[bis(carboxymethyl)amino]-5-hydroxy-5-oxopentanoate Chemical compound [Na+].OC(=O)CC[C@@H](C([O-])=O)N(CC(O)=O)CC(O)=O DLTWOYCDRWJVIM-JEDNCBNOSA-M 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000002639 bone cement Substances 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- MQJSAMHWABUSNQ-NBINMXDDSA-J tetrasodium (2S)-2-aminopentanedioate oxalate Chemical compound C(C(=O)[O-])(=O)[O-].N[C@@H](CCC(=O)[O-])C(=O)[O-].[Na+].[Na+].[Na+].[Na+] MQJSAMHWABUSNQ-NBINMXDDSA-J 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 108010076876 Keratins Proteins 0.000 description 1
- 102000011782 Keratins Human genes 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- PDIZYYQQWUOPPK-UHFFFAOYSA-N acetic acid;2-(methylamino)acetic acid Chemical compound CC(O)=O.CC(O)=O.CNCC(O)=O PDIZYYQQWUOPPK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- OPGYRRGJRBEUFK-UHFFFAOYSA-L disodium;diacetate Chemical compound [Na+].[Na+].CC([O-])=O.CC([O-])=O OPGYRRGJRBEUFK-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 235000013922 glutamic acid Nutrition 0.000 description 1
- 239000004220 glutamic acid Substances 0.000 description 1
- 239000011426 gypsum mortar Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229940080258 tetrasodium iminodisuccinate Drugs 0.000 description 1
- GYBINGQBXROMRS-UHFFFAOYSA-J tetrasodium;2-(1,2-dicarboxylatoethylamino)butanedioate Chemical group [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CC(C([O-])=O)NC(C([O-])=O)CC([O-])=O GYBINGQBXROMRS-UHFFFAOYSA-J 0.000 description 1
- -1 trisodium glutamate oxalate Chemical compound 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention relates to a green efficient gypsum retarder, which belongs to the field of gypsum building materials and is characterized by comprising the following components in parts by weight: 40-65 parts of ureido disuccinate, 20-35 parts of polyaspartate and 5-15 parts of stabilizer, wherein the stabilizer is one or a mixture of two of tetra sodium glutamate diacetate and trisodium methylglycine diacetate; the invention applies the calcium ureido disuccinate and the stabilizer tetra sodium glutamate diacetate/trisodium methylglycinate to the gypsum coagulant, in particular to the added stabilizer which does not have retarding effect and is compounded with polyaspartate for use, the three components are synergistic, the retarding effect of the retarder is greatly improved, and meanwhile, the influence on gypsum strength is small.
Description
Technical Field
The invention relates to the technical field of gypsum building materials, in particular to a green efficient gypsum retarder.
Background
Gypsum has a long history of its use as a mineral resource that is abundant and widely available. Is commonly used for plastering gypsum, gypsum mortar, gypsum boards, gypsum blocks, other decorative parts and the like. Often, gypsum is not a single component and often multiple additives are added to improve the performance of the gypsum. The retarder is one of the most used additives, the early strength of gypsum develops fast, the setting and hardening time is short, the fluidity is lost within a few minutes after water is added and stirring, and the normal construction requirement cannot be met. The setting time is usually prolonged by adding retarder, so that the gypsum slurry can keep plasticity for a long time, and the sufficient production operation time of the gypsum product or the gypsum slurry is given to improve the workability of gypsum.
The retarder commonly used in the market at present mainly comprises proteins, phosphates and organic acids. Although the variety is various, the retarder has poor quality, long setting time and less strength loss. The phosphate and the organic acid need higher mixing amount to realize good retarding effect, and obvious side effect can be generated along with the increase of the mixing amount, namely the gypsum strength loss rate is gradually increased. The protein retarder is mainly prepared by mixing animal keratin, industrial gelatin and the like with other substances through acid and alkali hydrolysis products, has strong pungent smell, and does not belong to environment-friendly materials.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the green efficient gypsum retarder, and the initial setting time can be more than 109 minutes only at the doping amount of 0.05 percent.
The technical scheme for solving the technical problems is as follows: the green efficient gypsum retarder is characterized by comprising the following components in parts by weight: 40-65 parts of ureido disuccinate, 20-35 parts of polyaspartate and 5-15 parts of stabilizer.
Further, the ureido disuccinate salt adopts calcium ureido disuccinate.
Further, the polyaspartate adopts one or a mixture of two of calcium polyaspartate and sodium polyaspartate.
Further, the green efficient gypsum retarder also comprises 5-15 parts by weight of auxiliary agent, and the stabilizer is one or a mixture of two of tetra sodium glutamate diacetate and trisodium methylglycine diacetate.
Further, the auxiliary agent is one or a mixture of two of maltose and sodium gluconate.
Further, the preparation method of the green efficient gypsum retarder comprises the following steps: uniformly mixing the ureido disuccinate aqueous solution, the polyaspartic acid aqueous solution and the stabilizer aqueous solution in proportion, and drying and crushing to obtain the gypsum retarder powder.
Wherein the solid content of the aqueous solution of ureido disuccinate is 45%, the solid content of the aqueous solution of polyaspartic acid is 40%, and the solid content of the aqueous solution of stabilizer is 40%.
Further, spray drying can be adopted in the drying and pulverizing processes.
Or, the green efficient gypsum retarder adopts another preparation method: and effectively blending the ureido disuccinate, polyaspartate powder and stabilizer powder to obtain the gypsum retarder. Wherein the particle size of the ureido disuccinate, polyaspartate and stabilizer powder is 100-150 meshes.
The mixing means can adopt a vertical or horizontal mixer to carry out efficient mixing.
The beneficial effects of the invention are as follows:
1. the invention creatively applies the calcium salt of ureido disuccinate and the stabilizer tetra sodium glutamate diacetate/trisodium methylglycinate to gypsum coagulant, especially the added stabilizer which does not have retarding effect and is used in combination with polyaspartate, and stable coordination compound can be generated with calcium ions by utilizing an amide bond and a carboxylic acid bond contained in the calcium salt of ureido disuccinate and is attached to the surface of crystal to cause lattice distortion, prevent the continuous growth of the crystal and generate good retarding effect; and through the interaction of polyaspartate and stabilizer tetra sodium glutamate diacetate/methyl glycine disodium diacetate, calcium ions are further complexed, so that the solubility of gypsum is reduced, and the water demand of gypsum is reduced. The three substances are synergistic, so that the retarding effect of the retarder is greatly improved, and meanwhile, the influence on the gypsum strength is small.
2. Compared with the prior art, the gypsum retarder consisting of the calcium ureido disuccinate, the stabilizer tetra sodium glutamate diacetate/trisodium methylglycine diacetate and the polyaspartate has the advantages that the mixing amount of the retarder is lower, and particularly, the initial setting time can be more than 109 minutes only at the mixing amount of 0.05 percent.
3. The components contained in the gypsum retarder prepared by the invention have good solubility in water, namely the gypsum retarder has full-dissolution property; the four components are all green degradable substances, and after entering the environment, the environment-friendly gypsum retarder can decompose micromolecular substances under the action of environmental microorganisms, is nontoxic and harmless to the environment and does not produce pollution.
Detailed Description
The principles and features of the present invention are described below with examples provided for the purpose of illustration only and are not intended to limit the scope of the invention.
Example 1
The formula composition of the novel green efficient gypsum retarder of the embodiment comprises: calculated in parts by weight (calculated by solid content), 55 parts of calcium ureido disuccinate, 30 parts of sodium polyaspartate and 10 parts of tetrasodium glutamate diacetate.
Uniformly mixing an ureido disuccinate aqueous solution, a polyaspartic acid sodium aqueous solution and a glutamic acid disodium acetate aqueous solution according to a proportion, and then performing spray drying by a spray drying tower to obtain powder. And mixing the powder with the malt saccharin powder by a vertical high-efficiency mixer for 30 minutes, sieving by a 150-mesh vibrating screen, removing screen residues, and obtaining the finished product of the gypsum retarder by the undersize part.
Example 2
The formula composition of the novel green efficient gypsum retarder of the embodiment comprises: 60 parts of calcium ureido disuccinate, 30 parts of calcium polyaspartate and 5 parts of tetrasodium glutamate diacetate.
Uniformly mixing an ureido disuccinate aqueous solution, a polyaspartate calcium aqueous solution and a monosodium glutamate diacetate aqueous solution according to a proportion, and then performing spray drying by a spray drying tower to obtain powder. And mixing the powder with the malt saccharin powder by a vertical high-efficiency mixer for 30 minutes, sieving by a 150-mesh vibrating screen, removing screen residues, and obtaining the finished product of the gypsum retarder by the undersize part.
Example 3
The formula composition of the novel green efficient gypsum retarder of the embodiment comprises: calculated in parts by weight (calculated by solid content), 50 parts of calcium ureido disuccinate, 30 parts of calcium polyaspartate and 15 parts of trisodium methylglycinate.
Uniformly mixing an ureido disuccinate aqueous solution, a polyaspartate calcium aqueous solution and a methyl glycine disodium salt aqueous solution according to a proportion, and then performing spray drying by a spray drying tower to obtain powder. And mixing the powder with the malt saccharin powder by a vertical high-efficiency mixer for 30 minutes, sieving by a 150-mesh vibrating screen, removing screen residues, and obtaining the finished product of the gypsum retarder by the undersize part.
Example 4
The formula composition of the novel green efficient gypsum retarder of the embodiment comprises: calculated in parts by weight (calculated by solid content), 65 parts of calcium ureido disuccinate, 20 parts of calcium polyaspartate and 10 parts of trisodium methylglycinate.
Uniformly mixing an ureido disuccinate aqueous solution, a polyaspartate calcium aqueous solution and a methyl glycine disodium salt aqueous solution according to a proportion, and then performing spray drying by a spray drying tower to obtain powder. And mixing the powder with the malt saccharin powder by a vertical high-efficiency mixer for 30 minutes, sieving by a 150-mesh vibrating screen, removing screen residues, and obtaining the finished product of the gypsum retarder by the undersize part.
Example 5
The formula composition of the novel green efficient gypsum retarder of the embodiment comprises: calculated in parts by weight (calculated by solid content), 50 parts of calcium ureido disuccinate, 35 parts of calcium polyaspartate and 10 parts of trisodium methylglycinate.
Uniformly mixing an ureido disuccinate aqueous solution, a polyaspartate calcium aqueous solution and a methyl glycine disodium salt aqueous solution according to a proportion, and then performing spray drying by a spray drying tower to obtain powder. And mixing the powder with sodium gluconate powder by a vertical high-efficiency mixer for 30 minutes, sieving by a 150-mesh vibrating screen, removing screen residues, and obtaining the finished product of the gypsum retarder by the undersize part.
Example 6
The formula composition of the novel green efficient gypsum retarder of the embodiment comprises: calculated in parts by weight (calculated by solid content), 40 parts of calcium ureido disuccinate, 35 parts of calcium polyaspartate and 15 parts of tetrasodium glutamate diacetate.
Uniformly mixing an ureido disuccinate aqueous solution, a polyaspartate calcium aqueous solution and a monosodium glutamate diacetate aqueous solution according to a proportion, and then performing spray drying by a spray drying tower to obtain powder. After the powder and the sodium gluconate powder are mixed for 30 minutes by adopting a vertical high-efficiency mixer, a 150-mesh vibrating screen is adopted for sieving, screen residues are removed, and the undersize part is the finished product of the gypsum retarder.
Example 7
The formulation of the novel green high-efficiency gypsum retarder of the embodiment further comprises 5 parts of auxiliary agent maltosaccharin based on the embodiment 6.
Example 8
The novel green efficient gypsum retarder formulation of the embodiment further comprises 15 parts of auxiliary sodium gluconate based on the formulation of the embodiment 6.
Comparative example 1
The gypsum retarder of this comparative example used 100% calcium ureido disuccinate.
Spray drying the aqueous solution of calcium ureido disuccinate to obtain powder, sieving with a 150-mesh vibrating screen, and removing the screen residue.
Comparative example 2
The gypsum retarder of this comparative example used 100% calcium polyaspartate.
Spray drying the calcium polyaspartate aqueous solution to obtain powder, sieving with 150 mesh vibrating sieve, and removing the screen residue.
Comparative example 3
The gypsum retarder of this comparative example used 100% tetrasodium glutamate diacetate.
And (3) spray drying the tetra sodium glutamate diacetate aqueous solution to obtain powder, sieving by adopting a 150-mesh vibrating screen, and removing screen residue.
Comparative example 4
The gypsum retarder of this comparative example used 100% trisodium methylglycinate.
Spray drying the aqueous solution of trisodium methylglycinate to obtain powder, sieving with 150 mesh vibrating sieve, and removing the screen residue.
Comparative example 5
The formulation and preparation method of the gypsum retarder of this comparative example were substantially the same as in example 2, except that the calcium polyaspartate was replaced with potassium polyaspartate.
Comparative example 6
The formulation and method of preparation of the gypsum retarder of this comparative example was substantially the same as in example 2, except that the calcium ureido disuccinate was replaced with sodium ureido disuccinate.
Comparative example 7
The formulation and method of preparation of the gypsum retarder of this comparative example was substantially the same as in example 2, except that calcium ureido disuccinate was replaced with tetrasodium iminodisuccinate.
Comparative example 8
The formulation of the gypsum retarder of this comparative example comprises: calculated in parts by weight (calculated by solid content), 70 parts of calcium ureido disuccinate, 20 parts of calcium polyaspartate and 5 parts of tetrasodium glutamate diacetate.
Uniformly mixing an ureido disuccinate calcium aqueous solution, a polyaspartate calcium aqueous solution and a monosodium glutamate diacetate aqueous solution according to a proportion, then carrying out spray drying by a spray drying tower to obtain powder, sieving by a 150-mesh vibrating screen, and removing screen residue to obtain the gypsum retarder.
Comparative example 9
The formulation of the gypsum retarder of this comparative example comprises: calculated in parts by weight (calculated by solid content), 20 parts of calcium ureido disuccinate, 70 parts of calcium polyaspartate and 5 parts of tetrasodium glutamate diacetate.
Uniformly mixing an ureido disuccinate calcium aqueous solution, a polyaspartate calcium aqueous solution and a monosodium glutamate diacetate aqueous solution according to a proportion, then carrying out spray drying by a spray drying tower to obtain powder, sieving by a 150-mesh vibrating screen, and removing screen residue to obtain the gypsum retarder.
Comparative example 10
The formulation and preparation method of the gypsum retarder of this comparative example were substantially the same as in example 2, except that calcium ureido disuccinate was not added.
Comparative example 11
The formulation and preparation method of the gypsum retarder of this comparative example were basically the same as in example 2, except that no calcium polyaspartate was added.
Comparative example 12
The formulation and preparation method of the gypsum retarder of this comparative example were basically the same as in example 2, except that tetrasodium glutamate diacetate was not added.
Comparative example 13
The formulation and preparation method of the gypsum retarder of this comparative example were substantially the same as in example 3, except that trisodium methylglycinate was not added.
Comparative example 14
The gypsum retarder of the comparative example adopts a commercially available citric acid gypsum retarder, and comprises the following components in parts by weight: 70 parts of citric acid, 20 parts of ash calcium powder and 10 parts of borax.
Comparative example 15
The gypsum retarder of the comparative example adopts a commercially available bone glue gypsum retarder, and comprises the following components in parts by weight: 80 parts of bone glue, 5 parts of borax and 15 parts of anhydrous sodium sulfate.
The products prepared in examples 1-6 and comparative examples 1-9 were tested for performance using the set time and the oven dry strength of the gypsum for each sample at the same batch of desulfurized gypsum (60% water usage at standard consistency) at an add-on level of 0.025% and 0.05% of the total weight of gypsum. The tested desulfurized gypsum is power plant desulfurized gypsum powder and is derived from Hebei Yao mineral product processing factories.
The measurement methods of the examples and the comparative examples according to the invention are carried out according to GB/T17669.4-1999 building gypsum. The test results are shown in the following table. Wherein, the blank control group is not added with any retarder.
Table 1 data on the retarding effect of retarder on desulfurized gypsum (gypsum retarder addition 0.025% except control group)
Table 2 retarder retarding effect on desulfurized gypsum (gypsum retarder addition 0.05% except control group)
From the data in tables 1 and 2, the added tetrasodium glutamate oxalate/trisodium methylglycinate has little retarding effect, and after the trisodium glutamate oxalate/trisodium methylglycinate is compounded with calcium ureido disuccinate and polyaspartate, especially the retarding effect of the whole system is obviously improved compared with the data of the example 2, the example 3, the comparative example 12 and the comparative example 13, and meanwhile, the influence on gypsum strength is small, so that the added tetrasodium glutamate oxalate/trisodium methylglycinate, the calcium ureido disuccinate and the polyaspartate have a synergistic effect. In addition, the gypsum retarder prepared by the method can achieve the initial setting time from 14min to 109-153min and the final setting time from 18min to 117-162min under the condition of adding 0.05%.
By adding the auxiliary agent into the gypsum retarder, the moisture absorption of the retarder powder can be effectively delayed, the fluidity of the powder is improved, the particles are uniform and fine, the batch stability is strong, and the method plays an important positive role in maintaining the applicability of the product.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (7)
1. The green efficient gypsum retarder is characterized by comprising the following components in parts by weight: 40-65 parts of ureido disuccinate, 20-35 parts of polyaspartate and 5-15 parts of stabilizer;
the ureido disuccinate adopts calcium ureido disuccinate, the polyaspartate adopts one or a mixture of two of calcium polyaspartate and sodium polyaspartate, and the stabilizer is one or a mixture of two of tetrasodium glutamate diacetate and trisodium methylglycinate diacetate.
2. The green high-efficiency gypsum retarder according to claim 1, further comprising 5-15 parts by weight of an auxiliary agent, wherein the auxiliary agent is one or a mixture of two of maltose and sodium gluconate.
3. The green high-efficiency gypsum retarder according to claim 1, wherein the preparation method thereof comprises: uniformly mixing the ureido disuccinate aqueous solution, the polyaspartic acid aqueous solution and the stabilizer aqueous solution in proportion, and drying and crushing to obtain the gypsum retarder powder.
4. A green high efficiency gypsum retarder according to claim 3, wherein the polyaspartic acid salt aqueous solution, the stabilizer aqueous solution have a solids content of 40%.
5. A green high efficiency gypsum retarder according to claim 3, wherein the aqueous solution of ureido disuccinate has a solids content of 45%.
6. A green high efficiency gypsum retarder according to claim 3, wherein the drying process is spray-dried.
7. The green high-efficiency gypsum retarder according to claim 1, wherein the preparation method thereof comprises: and effectively blending the ureido disuccinate, polyaspartate powder and stabilizer powder to obtain the gypsum retarder.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR807482A (en) * | 1935-06-24 | 1937-01-13 | Ici Ltd | Calcium sulphate plaster enhancements |
| DE10017133A1 (en) * | 2000-04-06 | 2001-10-18 | Bk Giulini Chem Gmbh & Co Ohg | Use of polysuccinimide or polyaspartic acid polymers as set retardants for gypsum compositions |
| CN108997170A (en) * | 2018-08-07 | 2018-12-14 | 贾国苓 | A kind of more carboxyl chelates of easy alkaline hydrolysis and its preparation process |
| CN112500018A (en) * | 2020-12-04 | 2021-03-16 | 河北协同环保科技股份有限公司 | Degradable efficient gypsum retarder and preparation method and application thereof |
| CN114751529A (en) * | 2022-01-13 | 2022-07-15 | 宜城成雄织造有限公司 | Environment-friendly phosphorus-free chelating agent and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR807482A (en) * | 1935-06-24 | 1937-01-13 | Ici Ltd | Calcium sulphate plaster enhancements |
| DE10017133A1 (en) * | 2000-04-06 | 2001-10-18 | Bk Giulini Chem Gmbh & Co Ohg | Use of polysuccinimide or polyaspartic acid polymers as set retardants for gypsum compositions |
| CN108997170A (en) * | 2018-08-07 | 2018-12-14 | 贾国苓 | A kind of more carboxyl chelates of easy alkaline hydrolysis and its preparation process |
| CN112500018A (en) * | 2020-12-04 | 2021-03-16 | 河北协同环保科技股份有限公司 | Degradable efficient gypsum retarder and preparation method and application thereof |
| CN114751529A (en) * | 2022-01-13 | 2022-07-15 | 宜城成雄织造有限公司 | Environment-friendly phosphorus-free chelating agent and preparation method thereof |
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