CN117210082A - High-flexibility martone coating and preparation method thereof - Google Patents
High-flexibility martone coating and preparation method thereof Download PDFInfo
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- CN117210082A CN117210082A CN202311329035.5A CN202311329035A CN117210082A CN 117210082 A CN117210082 A CN 117210082A CN 202311329035 A CN202311329035 A CN 202311329035A CN 117210082 A CN117210082 A CN 117210082A
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- 238000000576 coating method Methods 0.000 title claims abstract description 74
- 239000011248 coating agent Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title description 48
- 239000000839 emulsion Substances 0.000 claims abstract description 107
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 239000003973 paint Substances 0.000 claims abstract description 17
- 239000003125 aqueous solvent Substances 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 13
- 239000004575 stone Substances 0.000 claims abstract description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 12
- 229920002678 cellulose Polymers 0.000 claims abstract description 11
- 239000001913 cellulose Substances 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims abstract description 9
- 239000000178 monomer Substances 0.000 claims description 101
- 238000006243 chemical reaction Methods 0.000 claims description 55
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 47
- 239000002245 particle Substances 0.000 claims description 31
- 238000002156 mixing Methods 0.000 claims description 26
- 239000000243 solution Substances 0.000 claims description 26
- 239000006004 Quartz sand Substances 0.000 claims description 21
- 239000003999 initiator Substances 0.000 claims description 19
- 239000004593 Epoxy Substances 0.000 claims description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 17
- OMNKZBIFPJNNIO-UHFFFAOYSA-N n-(2-methyl-4-oxopentan-2-yl)prop-2-enamide Chemical compound CC(=O)CC(C)(C)NC(=O)C=C OMNKZBIFPJNNIO-UHFFFAOYSA-N 0.000 claims description 15
- 239000012792 core layer Substances 0.000 claims description 14
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 12
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 11
- QRIMLDXJAPZHJE-UHFFFAOYSA-N 2,3-dihydroxypropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(O)CO QRIMLDXJAPZHJE-UHFFFAOYSA-N 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 10
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 9
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 230000000844 anti-bacterial effect Effects 0.000 claims description 7
- 239000003899 bactericide agent Substances 0.000 claims description 7
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- BFBBLTGLAVFGCU-UHFFFAOYSA-N C(C(=C)C)(=O)OOCC.NC(=O)N.C=C Chemical compound C(C(=C)C)(=O)OOCC.NC(=O)N.C=C BFBBLTGLAVFGCU-UHFFFAOYSA-N 0.000 claims description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 6
- IPGANOYOHAODGA-UHFFFAOYSA-N dilithium;dimagnesium;dioxido(oxo)silane Chemical group [Li+].[Li+].[Mg+2].[Mg+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O IPGANOYOHAODGA-UHFFFAOYSA-N 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002562 thickening agent Substances 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000013530 defoamer Substances 0.000 claims description 2
- DZZVFJCQWKGPNY-UHFFFAOYSA-N ethyl 2-methylprop-2-eneperoxoate Chemical compound CCOOC(=O)C(C)=C DZZVFJCQWKGPNY-UHFFFAOYSA-N 0.000 claims description 2
- YAMHXTCMCPHKLN-UHFFFAOYSA-N imidazolidin-2-one Chemical compound O=C1NCCN1 YAMHXTCMCPHKLN-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- -1 modified silica sand Chemical class 0.000 claims description 2
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 25
- 239000002994 raw material Substances 0.000 description 18
- 230000000740 bleeding effect Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 16
- 230000032798 delamination Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 239000011268 mixed slurry Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 5
- 239000004816 latex Substances 0.000 description 5
- 229920000126 latex Polymers 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000012874 anionic emulsifier Substances 0.000 description 3
- 230000002528 anti-freeze Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000012875 nonionic emulsifier Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- RWHRFHQRVDUPIK-UHFFFAOYSA-N 50867-57-7 Chemical compound CC(=C)C(O)=O.CC(=C)C(O)=O RWHRFHQRVDUPIK-UHFFFAOYSA-N 0.000 description 1
- APLOSQYEODQCSX-UHFFFAOYSA-N CC(=C)C(=O)OCC(CO)OC(=O)C(C)=CCC(O)CO Chemical compound CC(=C)C(=O)OCC(CO)OC(=O)C(C)=CCC(O)CO APLOSQYEODQCSX-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical class O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004883 flower formation Effects 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 239000012466 permeate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 238000005382 thermal cycling Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention provides a high-flexibility bast-stone paint, which comprises the following components: 0.6 to 2 parts of protective glue, 0.05 to 0.3 part of hydroxyl cellulose, 13.5 to 31 parts of modified acrylic emulsion, 6 to 14.5 parts of filler, 1.5 to 5.5 parts of auxiliary agent and 26 to 54.5 parts of aqueous solvent. The coating prepared from the high-flexibility martone coating has excellent flexibility and can still keep excellent cracking resistance in an environment with large temperature difference.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a high-flexibility bast-stone coating and a preparation method thereof.
Background
Compared with the real stone paint, the paint has the advantages of easy occurrence of the problems of flower formation, stubble connection, chromatic aberration, large construction difficulty and the like, can solve the defects of the real stone paint, has the characteristics of good weather resistance, good stain resistance, good construction performance, high construction efficiency, high cost performance and the like, is suitable for decoration of outer walls of high-rise building plate buildings, hotel meetings, villa apartments and the like, and is also suitable for spray decoration of prefabricated plate surfaces such as composite heat insulation plates, integrated plates, metal aluminum plates and the like.
However, when the coating prepared from the marmite coating used in the market at present is used in an environment with a large temperature difference, the coating is easy to crack due to the effect of thermal expansion and cold contraction, and the protection effect on the base material is lost. Particularly, when the wall body with the member or the surface having the crack is used, the surface defect is difficult to cover.
Therefore, there is a need for a coating that maintains good flexibility and decorative properties in alternating hot and cold environments.
Disclosure of Invention
The invention aims to provide a high-flexibility marmite paint and a preparation method thereof, and the coating prepared from the high-flexibility marmite paint has excellent flexibility and can still keep excellent cracking resistance in an environment with large temperature difference.
According to a first aspect of the present invention there is provided a highly flexible marbleized paint comprising the following components: 0.6 to 2 parts of protective glue, 0.05 to 0.3 part of hydroxy cellulose, 13.5 to 31 parts of modified acrylic emulsion, 6 to 14.5 parts of filler, 1.5 to 5.5 parts of auxiliary agent and 26 to 54.5 parts of aqueous solvent; the modified acrylic emulsion is prepared by polymerizing an acrylic hard monomer, an acrylic soft monomer and a functional monomer; the acrylic hard monomer is at least one of methyl methacrylate and styrene, and the acrylic soft monomer is at least one of methyl acrylate, ethyl acrylate and butyl acrylate; the functional monomer comprises at least three of diacetone acrylamide, methacrylic acid, phosphate functional monomer, glycerol methacrylate and acrylamide; the modified acrylic emulsion is prepared by the following steps: s1, preparing a core monomer pre-emulsion and a shell monomer pre-emulsion: taking part of acrylic acid hard monomers, part of acrylic acid soft monomers and part of functional monomers, and uniformly mixing with an emulsifying agent to prepare a nuclear monomer pre-emulsion; uniformly mixing the rest acrylic hard monomer, the rest acrylic soft monomer, the rest functional monomer and an emulsifying agent to prepare a shell monomer pre-emulsion; s2, preparing core layer emulsion: uniformly mixing part of the nuclear monomer pre-emulsion with an initiator at 75-80 ℃, preserving heat until the reaction solution is refluxed, heating the reaction solution to 90-95 ℃ and preserving heat; until blue light appears in the reaction solution, cooling the reaction solution to 80-85 ℃, and dropwise adding a first mixed solution into the reaction solution for 1-1.5 hours, wherein the first mixed solution is prepared by mixing the residual nuclear monomer pre-emulsion and an initiator; after the first mixed solution is added dropwise, the reaction system is insulated for 1 to 1.5 hours at the temperature of 80 to 85 ℃ to prepare core-layer emulsion; s3, dropwise adding the shell monomer pre-emulsion and the initiator into the core layer emulsion at the temperature of 80-90 ℃ for 1.25-1.75 hours, and after the dropwise adding is finished, preserving the temperature of the reaction system for 1-1.5 hours to obtain the modified acrylic emulsion.
The protective glue in the raw materials of the high-flexibility martone coating provided by the invention has gel reaction with hydroxyethyl cellulose and modified acrylic emulsion, so that color particles can be prepared, and stone-imitating effect can be achieved through the color particles. The modified acrylic emulsion prepared from the specific polymer monomer is used as the emulsion of the high-flexibility martone coating, so that the film forming performance of color particles prepared from the high-flexibility martone coating can be effectively improved, the possibility of color bleeding of the color particles is reduced, the flexibility of a coating prepared from the high-flexibility martone coating can be improved, and the coating can still maintain excellent cracking resistance under the environment with larger temperature difference.
The invention selects the core-shell polymerization method to prepare the modified acrylic emulsion, which is favorable for preparing the emulsion with smaller latex particle diameter and concentrated latex particle diameter distribution and is convenient for large-scale production and preparation. In S3, the reaction process of the core layer emulsion and the shell monomer pre-emulsion is regulated by regulating the dripping speed of the shell monomer pre-emulsion and the initiator. If the dropping time is too long or the temperature during dropping is too high, the polymerization degree of the emulsion is too high, gel is generated, and side reactions are easy to occur; if the dropping time is too short or the temperature at the time of dropping is too low, the reaction may not be complete. And the reaction temperature and the reaction process are more favorably controlled by adding the nuclear monomer pre-emulsion and the initiator in multiple times, so that the reaction reject ratio is reduced. If the core monomer pre-emulsion and the initiator are added at one time in the S2 to prepare the core layer emulsion, more heat is released during the reaction in the preparation process, the reaction temperature is difficult to control, and the gel phenomenon of the core layer emulsion is easy to occur in the preparation process. Secondly, blue light appears in S2, namely, the main substance in the reaction system is latex particles with the particle size distribution of 50-200 nm. Due to scattering, the latex particles appear blue when light passes through the latex particles in this particle size range.
Preferably, the emulsifier comprises an anionic emulsifier and a nonionic emulsifier.
Preferably, the hard acrylic monomer is methyl methacrylate, the soft acrylic monomer is butyl acrylate, and the hard acrylic monomer is prepared by the following mass ratio: acrylic soft monomer: functional monomer=1 to 1.5: 2-3: 0.2 to 1. The invention selects methyl methacrylate as the acrylic acid hard monomer, butyl acrylate as the soft monomer, and makes the acrylic acid hard monomer: acrylic soft monomer: the feeding ratio of the functional monomer is 1-1.5: 2-3: and 0.2-1, the glass transition temperature of the prepared modified acrylic emulsion is in a proper range, and the elasticity and brittleness of the prepared modified acrylic emulsion can be balanced, so that the coating prepared from the high-flexibility martone coating has good hardness, tensile strength and excellent flexibility, extensibility and durability.
Preferably, the functional monomers comprise diacetone acrylamide, methacrylic acid and glycerol methacrylate, and the diacetone acrylamide is calculated according to the mole ratio: methacrylic acid: glycerol methacrylate = 1:1:1. the inventor finds that when the functional monomer with the specific proportion is adopted, the flexibility of the modified acrylic emulsion can be improved, the crack resistance and the flexibility of a coating prepared from the high-flexibility martone coating in a high-low temperature environment are further improved, and the possibility of cracking of the coating is reduced.
Preferably, the functional monomer further comprises ethylene urea ethoxy methacrylate, and the diacetone acrylamide is calculated according to the mole ratio: ethylene urea ethoxy methacrylate = 3-4: 1. through multiple experiments of the inventor, the inventor finds that the modified acrylic emulsion is prepared by adding the ethylene urea ethoxy methacrylate with a specific proportion to participate in polymerization on the basis of selecting diacetone acrylamide, methacrylic acid and glycerol methacrylate as modified monomers, so that the elasticity of the modified acrylic emulsion can be further improved, the compatibility between the modified acrylic emulsion and materials such as quartz sand, hydroxyethyl cellulose and the like is better, and the dispersibility of the high-flexibility martone coating in the storage process is improved.
Preferably, the protective gum is lithium magnesium silicate and the hydroxy cellulose is hydroxyethyl cellulose. When the lithium magnesium silicate with a layered structure is used as the protective glue and the hydroxyethyl cellulose is used as the hydroxy cellulose, the toughness and the strength of the color particles prepared by the gel reaction can be improved through the gel reaction of the protective glue, the hydroxy cellulose and the modified acrylic emulsion in the preparation process, so that the color particles can be uniformly and stably dispersed in the coating. Since the crystal structure unit of the lithium magnesium silicate is a tiny flake with the thickness calculated in nanometer, hydration can occur in the dispersion process of mixing the protective colloid and the aqueous solvent, and a large amount of aqueous solvent permeates into the lithium magnesium silicate in the flake layers to prop the lithium magnesium silicate open along the flake until the flakes are separated from each other. And the layers of the thin sheet are negatively charged, the end surfaces of the thin sheet are positively charged, and the thin sheet can form a 'clamping house' structure in the aqueous solvent under the action of repulsive force of charges and intermolecular van der Waals force. In the process of preparing the coating, the protective adhesive with the 'clamping house' structure, the hydroxyethyl cellulose with the hydroxyl structure and the modified acrylic emulsion further undergo a gelation reaction to form a semi-gelled protective layer with the thickness of 30-50 mu m on the surface of the color particles, so that the color particles can stably exist in the protective adhesive solution, and the anti-permeation performance of the high-flexibility bast-fiber coating is further enhanced. And weak hydrogen bond crosslinking is generated among the protective glue, the hydroxyethyl cellulose and the modified acrylic emulsion, so that the flexibility of the coating is enhanced.
Preferably, the filler comprises titanium dioxide, kaolin and quartz sand, and the quartz sand accounts for 86-98% of the filler. The quartz sand is used as the main filler of the high-flexibility marbleite coating, and can show better stone-like effect with color particles.
Preferably, the quartz sand is modified quartz sand modified by an epoxy silane coupling agent. Through the modification reaction of the epoxy silane coupling agent and the quartz sand, the surface of the modified quartz sand is grafted with epoxy groups, so that the prepared modified quartz sand has better suspension dispersion stability, and the material dispersion stability of the high-flexibility bast-sand coating is improved. And the modified quartz sand grafted with epoxy groups and modified acrylic emulsion with amino groups can further undergo a crosslinking reaction to generate stable chemical bonds, so that the cohesiveness between the modified quartz sand and the modified acrylic emulsion and the adhesive force between a coating prepared from the high-flexibility martone coating and a substrate are further increased.
Preferably, the modified quartz sand is prepared according to the following steps: firstly, uniformly mixing quartz sand and toluene, then adding an epoxy silane coupling agent into a reaction system to obtain a first reaction solution, and then reacting the first reaction solution at 60-80 ℃ for 5.5-6.5 hours, precipitating, centrifuging, washing and drying to obtain modified quartz sand, wherein the feeding mass ratio of the quartz sand to the epoxy silane coupling agent is 15-20: 1. the preparation method has mild conditions and simple operation, is beneficial to large-scale production and preparation, and can reduce the cost of raw materials. Secondly, when the mass ratio of the quartz sand to the epoxy silane coupling agent is 15-20: 1, the grafting rate of the quartz sand can be further improved. If the usage amount of the quartz sand is too large, the content of the epoxy silane coupling agent is too small, and the grafting rate of the modified quartz sand is small; if the usage amount of the quartz sand is too small, the content of the epoxy silane coupling agent is too large, partial self-polymerization is easy to occur, and the grafting rate of the modified quartz sand is also smaller.
Preferably, the auxiliary agents comprise bactericides, anti-settling stabilizers, dispersants, wetting stabilizers, defoamers, antifreezes, film forming aids, multifunctional aids, propylene glycol and thickeners.
Preferably, the anti-settling stabilizer is at least one selected from modified bentonite, special xanthan gum and modified cellulose ether.
Optionally, the titanium dioxide is selected from at least one of BLR-698 product from Dragon boa, and ATR-311 rutile titanium dioxide from Anna.
Optionally, the wetting stabilizer is selected from at least one of the products of grid company under the trade name G-399, grid company under the trade name DC809, and grid company under the trade name W-2520.
Optionally, the hydroxyethyl cellulose is selected from at least one of the product of silver hawk company under the trademark BR30000H, the product of Account Sunnobel company under the trademark EHM500, and the product of Asian blue company under the trademark 250 HBR.
According to another aspect of the present invention, there is provided a method of preparing the above-mentioned high-flexibility marbleized stone paint, comprising the steps of: uniformly mixing the protective glue, the hydroxy cellulose, the part of modified acrylic emulsion, the filler, the part of auxiliary agent and the part of aqueous solvent to generate colored particles in a reaction system, and adding the rest of modified acrylic emulsion, the rest of auxiliary agent and the rest of aqueous solvent into the reaction system when the particle size of the colored particles reaches a preset target particle size, and uniformly stirring to obtain the high-flexibility bast-stone coating. The preparation method provided by the invention can adjust the particle size range of the color particles according to market demands. The preparation method is simple in preparation process, convenient and fast to operate, low in cost, mild in condition and good in economic benefit.
Drawings
Fig. 1 is a schematic diagram showing elongation at break of the coating prepared in example 1 and the coating prepared in comparative example 1, and the correspondence between the reference numerals is: 1 is example 1, and 2 is comparative example 1.
Detailed Description
In order that the manner in which the above-recited embodiments of the invention are attained and can be readily understood by those skilled in the art, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Example 1
The embodiment provides a high-flexibility bast-stone coating, which is prepared by the following steps:
(1) Preparation of modified acrylic emulsion
The preparation raw materials of the modified acrylic emulsion comprise: 15 parts of acrylic hard monomer, 25 parts of acrylic soft monomer, 10 parts of functional monomer, 1 part of anionic emulsifier, 3.5 parts of nonionic emulsifier, 0.5 part of initiator and 0.5 part of PH regulator. Wherein the hard acrylic monomer is Methyl Methacrylate (MMA), the soft acrylic monomer is Butyl Acrylate (BA), the functional monomer is diacetone acrylamide (Diacetone acrylamide, DAAM), methacrylic acid (Methacrylic acid), glycerol methacrylate (Glyceryl monomethacrylate) and ethyleneurea ethoxy methacrylate (UMA), and the diacetone acrylamide is calculated according to the molar ratio: methacrylic acid: glycerol methacrylate: ethylene urea ethoxy methacrylate = 3:3:3:1.
the modified acrylic emulsion is prepared by the following steps:
s1, preparing a core monomer pre-emulsion and a shell monomer pre-emulsion:
uniformly mixing 1/2 acrylic hard monomer, 1/2 acrylic soft monomer, 1/2 functional monomer and emulsifier to obtain a nuclear monomer pre-emulsion; and uniformly mixing the rest acrylic hard monomer, the rest acrylic soft monomer, the rest functional monomer and the emulsifier to prepare the shell monomer pre-emulsion. In practical production application, the addition amount of the acrylic hard monomer, the acrylic soft monomer, the anionic emulsifier and the nonionic emulsifier in the nuclear monomer pre-emulsion can be adjusted according to practical conditions.
S2, preparing core layer emulsion:
uniformly mixing the 1/3 nuclear monomer pre-emulsion and a 1/3 initiator, preserving heat at 78 ℃ until the reaction solution is refluxed, and heating the reaction solution to 90 ℃ for preserving heat; and (3) until blue light appears in the reaction solution, cooling the reaction system to 85 ℃, dropwise adding a first mixed solution into the reaction system for 1.5 hours, wherein the first mixed solution is prepared by mixing the residual 2/3 nuclear monomer pre-emulsion and a 1/3 initiator. After the first mixed solution is added dropwise, the reaction system is kept at 85 ℃ for 1 hour to prepare the nuclear layer emulsion.
S3, dropwise adding the shell monomer pre-emulsion and the rest 1/3 initiator into the core layer emulsion at the temperature of 85 ℃ for 1.5 hours, and after the dropwise adding is finished, preserving the temperature of the reaction system for 1 hour to obtain the modified acrylic emulsion.
(2) Preparation of modified Quartz Sand
The modified quartz sand is modified by an epoxy silane coupling agent, wherein the epoxy silane coupling agent is 3- (2, 3-glycidoxy) propyl trimethoxy silane.
The modified quartz sand is prepared by the following steps:
firstly, uniformly mixing quartz sand and toluene, performing ultrasonic dispersion for 30 minutes, then adding an epoxy silane coupling agent into a reaction system, and continuing ultrasonic treatment for 5 minutes to obtain a first reaction solution. And then the first reaction liquid is reacted for 6 hours at 70 ℃, and the modified quartz sand is obtained after precipitation, centrifugation, washing and drying. Wherein, the feeding mass ratio of the quartz sand to the epoxy silane coupling agent is 15:1.
(3) Preparation of high-flexibility bast-stone paint
The preparation raw materials of the high-flexibility marbleized stone coating comprise the following components: 1.1 parts of protective adhesive, 0.3 part of hydroxy cellulose, 22 parts of modified acrylic emulsion, 30.3 parts of filler, 3.4 parts of auxiliary agent and 26 to 54.5 parts of aqueous solvent. Wherein the filler comprises 27 parts of modified quartz sand, 0.6 part of titanium dioxide and 2.7 parts of kaolin; the auxiliary agents comprise bactericides, anti-settling stabilizers, dispersants, wetting stabilizers, defoamers, antifreezes, film forming auxiliary agents, multifunctional auxiliary agents, propylene glycol and thickening agents. In this embodiment, the amount of each auxiliary agent may be adjusted according to actual conditions.
The high-flexibility martone coating is prepared by the following steps:
and mixing the first mixed slurry containing the protective adhesive with the second mixed slurry containing the hydroxy cellulose, part of modified acrylic emulsion, filler, part of auxiliary agent and part of aqueous solvent, and uniformly stirring at a dispersion speed of 1200rpm to generate color particles in a reaction system. When the particle size of the color particles reaches the preset target particle size, adding the third mixed slurry into the reaction system, and uniformly stirring at a dispersion speed of 1000rpm to obtain the high-flexibility marlite coating. The third mixed slurry contains the rest modified acrylic emulsion, the rest auxiliary agent and the rest aqueous solvent.
The preparation operation of the first mixed pulp, the second mixed pulp and the third mixed pulp is as follows: first mixed slurry: firstly, mixing part of aqueous solvent, part of bactericide and anti-settling stabilizer, stirring for 15 minutes at a rotation speed of 500rpm, then adding part of protective adhesive into a reaction system, and stirring for 30 minutes to prepare first mixed slurry.
And (3) second mixed slurry: and then uniformly mixing part of the aqueous solvent, part of the bactericide, the antifreeze, the dispersing agent, the wetting stabilizer, part of the defoamer, the titanium pigment, the calcined kaolin and the hydroxyethyl cellulose in sequence, stirring for 15 minutes at a rotating speed of 1500rpm, adding the multifunctional auxiliary agent, and uniformly mixing to obtain the premixed slurry. And uniformly mixing the premixed slurry with the rest of bactericide, film-forming auxiliary agent, modified acrylic emulsion and rest of defoaming agent, adding protective adhesive into a reaction system, uniformly mixing at a rotating speed of 1500rpm, and finally adding modified quartz sand to prepare second mixed slurry.
Third mixed slurry: and sequentially and uniformly mixing water, modified acrylic emulsion, a defoaming agent, a film forming additive, propylene glycol, a bactericide, a thickener and a multifunctional additive to prepare third mixed slurry.
Example 2
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in the preparation of the modified acrylic emulsion, the addition of ethylene urea ethoxy methacrylate was omitted. Equivalently, diacetone acrylamide, methacrylic acid and glycerol methacrylate are selected as functional monomers, and the proportion of the rest raw materials and the preparation method are strictly consistent with those of the example 1.
Example 3
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in the process of preparing the modified acrylic emulsion, diacetone acrylamide is selected as a functional monomer, and the feeding amount of diacetone acrylamide is identical to that of the functional monomer in example 1. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 4
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in the process of preparing the modified acrylic emulsion, methacrylic acid was selected as the functional monomer, and the amount of methacrylic acid charged was the same as that of the functional monomer in example 1. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 5
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in the process of preparing the modified acrylic emulsion, glycerol methacrylate was selected as the functional monomer, and the amount of glycerol methacrylate fed was the same as that of the functional monomer in example 1. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 6
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in S3 for preparing the modified acrylic emulsion, the dropping temperature and the dropping time are adjusted. In this example, the shell monomer pre-emulsion and initiator were added dropwise to the core layer emulsion at 80℃for 1.75 hours. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 7
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in S3 for preparing the modified acrylic emulsion, the dropping temperature and the dropping time are adjusted. In this example, the shell monomer pre-emulsion and initiator were added dropwise to the core layer emulsion at 90℃for 1.25 hours. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 8
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: the step of preparing the modified quartz sand is omitted, and in the process of preparing the high-flexibility bast-stone coating, the modified quartz sand selected in the embodiment 1 is replaced by the equal-quality unmodified quartz sand. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 9
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in the process of preparing the modified quartz sand, the mass ratio of the quartz sand to the epoxy silane coupling agent is 10:1. the proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 10
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in the process of preparing the modified quartz sand, the mass ratio of the quartz sand to the epoxy silane coupling agent is 20:1. the proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Example 11
This example, with reference to the preparation method provided in example 1, provides a high-flexibility martone coating, and the difference between this example and example 1 is that: in the process of preparing the modified quartz sand, the mass ratio of the quartz sand to the epoxy silane coupling agent is 25:1. the proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Comparative example 1
This comparative example, which is different from example 1 in that a high-flexibility martone coating was prepared with reference to the preparation method provided in example 1: in the process of preparing the high-flexibility martone coating, the modified acrylic emulsion adopted in the component A and the component B in the example 1 is replaced by the emulsion with the same quality and the brand RS-9723A produced by the Baderfu company. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Comparative example 2
This comparative example, which is different from example 1 in that a high-flexibility martone coating was prepared with reference to the preparation method provided in example 1: in the S2 process of preparing the modified acrylic emulsion, all the nuclear monomer pre-emulsion and the initiator are mixed at one time to prepare the nuclear layer emulsion. The specific operation is as follows: uniformly mixing all the nuclear monomer pre-emulsion and an initiator at 78 ℃, preserving heat until the reaction solution is refluxed, and heating the reaction solution to 90 ℃ for preserving heat; until blue light appears in the reaction solution, the reaction solution is cooled to 85 ℃, and the reaction system is kept at 85 ℃ for 1 hour to prepare the nuclear layer emulsion. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Comparative example 3
This comparative example, which is different from example 1 in that a high-flexibility martone coating was prepared with reference to the preparation method provided in example 1: in S3 for preparing the modified acrylic emulsion, the dropping temperature and the dropping time are adjusted. In this comparative example, the shell monomer pre-emulsion and initiator were added dropwise to the core layer emulsion at 75℃for 2 hours. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Comparative example 4
This comparative example, which is different from example 1 in that a high-flexibility martone coating was prepared with reference to the preparation method provided in example 1: in S3 for preparing the modified acrylic emulsion, the dropping temperature and the dropping time are adjusted. In this comparative example, the shell monomer pre-emulsion and initiator were added dropwise to the core layer emulsion at 95℃for 1 hour. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.
Test case
A reference subject: the high flexibility marlite coatings provided in examples 1 to 11 and comparative examples 1 to 4.
Test items and test methods:
(1) Storage stability: referring to GB/T6753.3-1986 paint storage stability test method, whether color particles have bleeding phenomenon or not is detected after the paint is stored for 1 month.
(2) Resistance to cold and hot cycles: the cold and hot cycle resistance of the coatings prepared by the test subjects was tested with reference to HG/T0004-2012 paint and varnish film cold and hot cycle test method.
(3) Elongation at break: the elongation at break of the coating obtained by the subject was tested with reference to GB/T528-2009 determination of tensile stress strain properties of vulcanized rubber or thermoplastic rubber.
(4) Adhesion to substrate: the adhesion of the coatings produced by the test subjects to the substrate was tested with reference to the cross-hatch test of GB/T9286-1998 color and clear lacquer films.
Test results: the test results are shown in Table 1, and the elongation at break comparison graph of example 1 and comparative example 1 is shown in FIG. 1; 1 in fig. 1 is example 1, and 2 is comparative example 1.
TABLE 1 test Performance for each subject
| Group of | Storage stability | Resistance to cold and hot cycles | Elongation at break | Adhesion force |
| Example 1 | No bleeding and no delamination | Level 1 | 210％ | Level 0 |
| Example 2 | No bleeding and no delamination | Level 1 | 180％ | Level 0 |
| Example 3 | No bleeding and no delamination | Level 1 | 150％ | Level 0 |
| Example 4 | No bleeding and no delamination | Level 1 | 145％ | Level 0 |
| Example 5 | No bleeding and no delamination | Level 1 | 130％ | Level 0 |
| Example 6 | No bleeding and no delamination | Level 1 | 190％ | Level 0 |
| Example 7 | No bleeding and no delamination | Level 1 | 200％ | Level 0 |
| Example 8 | No bleeding and no delamination | Level 1 | 170％ | Level 1 |
| Example 9 | No bleeding and no delamination | Level 1 | 150％ | Level 1 |
| Example 10 | No bleeding and no delamination | Level 1 | 180％ | Level 0 |
| Example 11 | No bleeding and no delamination | Level 1 | 150％ | Level 1 |
| Comparative example 1 | No bleeding and no delamination | Level 1 | 30％ | Level 1 |
| Comparative example 2 | / | / | / | / |
| Comparative example 3 | Bleeding and delamination | Level 2 | 110％ | Level 1 |
| Comparative example 4 | Bleeding and delamination | Level 2 | 125％ | Level 1 |
Analysis of results:
comparing the test performance of the high flexibility marlite coatings prepared in examples 1-11 with the coatings prepared in comparative examples 1-4 in Table 1, it can be seen that the coatings of examples 1-11 have better storage stability and the coatings have better resistance to thermal cycling, elongation at break, and adhesion to the substrate than the coatings of comparative examples 1-4.
Comparing the test data of examples 1 to 11 with the test data of comparative example 1, it can be seen that, compared with the coating corresponding to comparative example 1 prepared by using the commercial emulsion, the coating corresponding to examples 1 to 11 has a larger elongation at break and is more resistant to cold and heat cycles, which indicates that the modified acrylic emulsion prepared by using the specific steps can make the prepared coating have higher flexibility and still maintain excellent cracking resistance under the environment with a larger temperature difference. In contrast, in comparative example 2, the modified acrylic emulsion was not prepared by stepwise synthesis, and in the process of preparing the modified acrylic emulsion, the mixed slurry used for preparing the modified acrylic emulsion had a gel phenomenon, so that it was impossible to prepare a coating material or a coating layer.
Comparing the performances of comparative examples 3 to 4, example 1 and examples 6 to 7 in Table 1, it can be seen that, as the dropping time increases and the dropping temperature decreases in S3 for preparing the modified acrylic emulsion, the breaking elongation of the prepared coating layer tends to increase and then decrease, which means that the prepared modified acrylic emulsion can better improve the flexibility and cracking resistance of the coating when the dropping temperature is 80 to 90 ℃ and the dropping time is 1.25 to 1.75 hours.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. The high-flexibility marbleized stone coating is characterized by comprising the following components: 0.6 to 2 parts of protective glue, 0.05 to 0.3 part of hydroxy cellulose, 13.5 to 31 parts of modified acrylic emulsion, 6 to 14.5 parts of filler, 1.5 to 5.5 parts of auxiliary agent and 26 to 54.5 parts of aqueous solvent;
the modified acrylic emulsion is prepared by polymerizing an acrylic hard monomer, an acrylic soft monomer and a functional monomer; the acrylic hard monomer is at least one of methyl methacrylate and styrene, and the acrylic soft monomer is at least one of methyl acrylate, ethyl acrylate and butyl acrylate; the functional monomer comprises at least one of diacetone acrylamide, methacrylic acid, phosphate functional monomer, glycerol methacrylate and acrylamide;
the modified acrylic emulsion is prepared by the following steps:
s1, preparing a core monomer pre-emulsion and a shell monomer pre-emulsion: taking part of the acrylic acid hard monomer, part of the acrylic acid soft monomer, part of the functional monomer and emulsifier, and uniformly mixing to obtain the nuclear monomer pre-emulsion; uniformly mixing the rest of the acrylic hard monomer, the rest of the acrylic soft monomer, the rest of the functional monomer and the emulsifying agent to prepare the shell monomer pre-emulsion;
s2, preparing core layer emulsion: uniformly mixing part of the nuclear monomer pre-emulsion and an initiator at 75-80 ℃, preserving heat until the reaction solution is refluxed, heating the reaction solution to 90-95 ℃ and preserving heat; cooling the reaction solution to 80-85 ℃ until blue light appears in the reaction solution, and dropwise adding a first mixed solution into the reaction solution for 1-1.5 hours, wherein the first mixed solution is prepared by mixing the residual nuclear monomer pre-emulsion and the initiator; after the first mixed solution is dripped, the temperature of the reaction system is kept for 1 to 1.5 hours at the temperature of 80 to 85 ℃ to prepare the core emulsion;
s3, dropwise adding the shell monomer pre-emulsion and the initiator into the core layer emulsion at the temperature of 80-90 ℃ for 1.25-1.75 hours, and after the dropwise adding is finished, preserving the temperature of the reaction system for 1-1.5 hours to obtain the modified acrylic emulsion.
2. The high-flexibility marbling paint of claim 1, wherein the acrylic hard monomer is methyl methacrylate, the acrylic soft monomer is butyl acrylate, and the acrylic hard monomer is as follows: the acrylic soft monomer: the functional monomer=1 to 1.5: 2-3: 0.2 to 1.
3. The high-flexibility bast-stone paint according to claim 1, wherein the functional monomer comprises diacetone acrylamide, methacrylic acid and methacrylic acid glyceride, and the diacetone acrylamide is calculated according to the mole ratio: the methacrylic acid: the glycerol methacrylate = 1:1:1.
4. the highly flexible marbling paint of claim 3, wherein said functional monomer further comprises ethylene urea ethoxy methacrylate, and said diacetone acrylamide is calculated by mole ratio: the ethyleneurea ethoxy methacrylate=3 to 4:1.
5. the highly flexible marbling paint of claim 1, wherein the protective gum is lithium magnesium silicate and the hydroxy cellulose is hydroxyethyl cellulose.
6. The high-flexibility bast-sand coating of claim 1, wherein the filler comprises titanium dioxide, kaolin, quartz sand, and the quartz sand comprises 86-98% of the filler.
7. The high-flexibility bast-sand coating of claim 6 wherein the silica sand is modified silica sand modified with an epoxy silane coupling agent.
8. The high-flexibility bast-sand coating of claim 7, wherein the modified quartz sand is prepared by the steps of:
firstly, uniformly mixing quartz sand and toluene, then adding an epoxy silane coupling agent into a reaction system to obtain a first reaction solution, and then reacting the first reaction solution at 60-80 ℃ for 5.5-6.5 hours, precipitating, centrifuging, washing and drying to obtain modified quartz sand, wherein the feeding mass ratio of the quartz sand to the epoxy silane coupling agent is 15-20: 1.
9. the highly flexible marbling paint of claim 1, wherein the auxiliary agent comprises a bactericide, an anti-settling stabilizer, a dispersant, a wetting stabilizer, a defoamer, an antifreezing agent, a film-forming auxiliary agent, a multifunctional auxiliary agent, propylene glycol, and a thickener.
10. A process for preparing a highly flexible marl coating according to any one of claims 1 to 9, comprising the steps of:
and uniformly mixing the protective glue, the hydroxy cellulose, part of the modified acrylic emulsion, the filler, part of the auxiliary agent and part of the aqueous solvent to generate colored particles in a reaction system, and adding the rest of the modified acrylic emulsion, the rest of the auxiliary agent and the rest of the aqueous solvent into the reaction system when the particle size of the colored particles reaches a preset target particle size, and uniformly stirring to obtain the high-flexibility bast-stone coating.
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