CN117487424B - High weather-resistant anti-pollution real stone paint - Google Patents
High weather-resistant anti-pollution real stone paint Download PDFInfo
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- CN117487424B CN117487424B CN202311850271.1A CN202311850271A CN117487424B CN 117487424 B CN117487424 B CN 117487424B CN 202311850271 A CN202311850271 A CN 202311850271A CN 117487424 B CN117487424 B CN 117487424B
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- 239000003973 paint Substances 0.000 title claims abstract description 84
- 239000004575 stone Substances 0.000 title claims abstract description 75
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000000839 emulsion Substances 0.000 claims abstract description 70
- 239000004576 sand Substances 0.000 claims abstract description 54
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 51
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 51
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 51
- 229920005610 lignin Polymers 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002562 thickening agent Substances 0.000 claims abstract description 36
- 239000008367 deionised water Substances 0.000 claims abstract description 22
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 22
- 239000000654 additive Substances 0.000 claims abstract description 18
- 230000000996 additive effect Effects 0.000 claims abstract description 18
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- 239000013530 defoamer Substances 0.000 claims abstract description 10
- 229920001577 copolymer Polymers 0.000 claims abstract description 9
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims abstract description 9
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 83
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 23
- 238000002360 preparation method Methods 0.000 claims description 23
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 15
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 13
- 229910052731 fluorine Inorganic materials 0.000 claims description 13
- 239000011737 fluorine Substances 0.000 claims description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 11
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 10
- SUAKHGWARZSWIH-UHFFFAOYSA-N N,N‐diethylformamide Chemical compound CCN(CC)C=O SUAKHGWARZSWIH-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 10
- 239000000706 filtrate Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 10
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 10
- FRGPKMWIYVTFIQ-UHFFFAOYSA-N triethoxy(3-isocyanatopropyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCN=C=O FRGPKMWIYVTFIQ-UHFFFAOYSA-N 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 9
- 239000010408 film Substances 0.000 claims description 8
- IPGANOYOHAODGA-UHFFFAOYSA-N dilithium;dimagnesium;dioxido(oxo)silane Chemical compound [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 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 229940009868 aluminum magnesium silicate Drugs 0.000 claims description 2
- WMGSQTMJHBYJMQ-UHFFFAOYSA-N aluminum;magnesium;silicate Chemical compound [Mg+2].[Al+3].[O-][Si]([O-])([O-])[O-] WMGSQTMJHBYJMQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 5
- 230000005856 abnormality Effects 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 4
- 238000005187 foaming Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 3
- 238000010257 thawing Methods 0.000 abstract description 3
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000004925 denaturation Methods 0.000 abstract description 2
- 230000036425 denaturation Effects 0.000 abstract description 2
- 238000002845 discoloration Methods 0.000 abstract description 2
- 238000007710 freezing Methods 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 238000010298 pulverizing process Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- -1 acrylic ester Chemical class 0.000 description 5
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 239000003755 preservative agent Substances 0.000 description 2
- 230000002335 preservative effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 150000003608 titanium Chemical class 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 125000005371 silicon functional group Chemical group 0.000 description 1
- 239000008279 sol Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/28—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for wrinkle, crackle, orange-peel, or similar decorative effects
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/43—Thickening agents
- C09D7/44—Combinations of two or more thickening agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The high weather-proof anti-pollution real stone paint is composed of natural color sand, natural white sand, silicone-acrylic emulsion, fluorocarbon coated hydrotalcite, modified lignin, aqueous fluorocarbon emulsion, inorganic thickener, defoamer polyether-siloxane copolymer, dispersant sodium lignin sulfonate, film forming additive propylene glycol methyl ether acetate and deionized water; the prepared stone paint has low-temperature storage stability (3 times of circulation) without caking and agglomeration; the water absorption (2 hours, g) is 0.1-0.2 g; the water resistance is 575-610 hours without abnormality; alkali resistance is 435-454 hours without abnormality; no foaming, crack, peeling and powder falling occur during temperature denaturation (10 times); contamination resistance grade 1; the artificial weather aging resistance is free from foaming, cracking and peeling, and the pulverization and the discoloration are all 0 level; flexibility, diameter 20mm without crack; the bonding strength is 1.74-1.81 MPa, and the freezing and thawing cycle (5 times) is 1.67-1.73 MPa.
Description
Technical Field
The invention relates to a high weather-resistant anti-pollution real stone paint, and belongs to the technical field of paint.
Background
Along with the high-speed development of economy, the building industry continuously shows a plurality of excellent materials, namely, the real stone paint has the characteristics of better water resistance, freeze-thawing resistance, wide application range and the like, and is widely applied to wall exterior finishing materials at present. The weather resistance and the pollution resistance of the outer wall are particularly important because the outer wall is exposed outdoors for a long time and can be subjected to long-term test of severe conditions such as frost, snow, rain, ultraviolet rays, various corrosive substances, temperature and humidity changes and the like. The natural stone paint is mainly made of synthetic resin emulsion as main adhesive, natural color sand or artificial sand as aggregate and small amount of assistant, and has the advantages of lower cost than natural stone, light weight, convenient construction, high adhesion, water resistance, no falling hidden trouble for high-rise building, etc.
Chinese patent CN112125579a discloses a self-cleaning high weather-proof real stone paint and its preparation method, the base material comprises the following components in parts by weight: silicone-acrylic emulsion, acrylic ester emulsion, silica sol, polyethylene glycol modified titanium sol, dibutyl tin dilaurate, defoamer, film forming additive, antifreezing agent, cellulose, multifunctional additive, thickener, preservative and water; the preparation method of the stone paint comprises the following steps: i: mixing and dispersing the defoaming agent, the film forming auxiliary agent, the antifreezing agent, the cellulose and the water, and then adding the multifunctional auxiliary agent; II: mixing the obtained product in the step I with silicone-acrylic emulsion, acrylic ester emulsion, silica sol, polyethylene glycol modified titanium sol and dibutyl tin dilaurate, and uniformly stirring; III: uniformly stirring the thickening fluid, the preservative and the product obtained in the step II to obtain a base material; IV: and uniformly mixing the base material and the natural color sand to obtain the real stone paint. The real stone paint obtained by the patent has the advantages that the surface energy of a paint film is regulated by regulating the use proportion of the silicone-acrylate emulsion and the acrylic ester emulsion, so that the anti-pollution performance of the paint film is improved, the mode has great limitation on improving the anti-pollution performance, the problem of easy dust adsorption cannot be fundamentally solved, and the weather resistance of the real stone paint is definitely not good, because the acrylic ester resin paint film formed by the acrylic ester emulsion has natural defects.
Chinese patent CN106336749A discloses a stain-resistant real stone paint, which takes pure acrylic emulsion as a main film forming material, uses the synergistic effect of two substances of ethyl silicate and cellulose acetate to reduce the surface tension of a paint film and strengthen the stain resistance of the paint film.
It can be seen from the above patent that the poor weather resistance and poor pollution resistance of the real stone paint are still one of the most difficult key problems to solve in the long-term use period, so that the development of the high weather-resistant and pollution-resistant real stone paint has great practical significance.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the high weather-resistant anti-pollution real stone paint, which realizes the following aims: develop the real stone paint with good weather resistance and excellent anti-pollution performance.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the specific formula of the high weather-resistant anti-pollution real stone paint comprises the following components in parts by weight:
30-55 parts of natural color sand,
35-70 parts of natural white sand,
70-100 parts of silicone-acrylic emulsion,
10-20 parts of fluorocarbon coated hydrotalcite,
9-19 parts of modified lignin,
4-8 parts of aqueous fluorocarbon emulsion,
8-13 parts of inorganic thickener,
0.3-0.7 part of defoamer polyether-siloxane copolymer,
3-6 parts of dispersant sodium lignin sulfonate,
8-11 parts of film forming additive propylene glycol methyl ether acetate,
10-20 parts of deionized water;
the grain size of the natural color sand is 50-100 meshes;
the particle size of the natural white sand is 100-300 meshes;
the viscosity of the silicone-acrylic emulsion is 250-950 mPa.s, the pH value is 7-9, and the solid content is 48-54 wt%;
the solid content of the aqueous fluorocarbon emulsion is 45-52 wt%, the fluorine content is 10-14 wt%, the pH value is 7-8.5, and the hydroxyl value is 55-75 mgKOH/g;
the particle size of the inorganic thickener is 200-300 meshes;
the inorganic thickener is one of lithium magnesium silicate and aluminum magnesium silicate;
the following is a further improvement of the above technical scheme:
step 1, preparation of fluorocarbon coated hydrotalcite
Drying hydrotalcite at 80-95 ℃ for 3-5 hours, adding the hydrotalcite into a reaction kettle, adding 1, 4-dioxane into the reaction kettle, starting a high-speed dispersing paddle, dispersing for 2-4 hours at 15000-25000 r/min, adding fluorocarbon resin into the kettle, closing the high-speed dispersing paddle, starting a stirring paddle, controlling the stirring speed to be 800-1200 r/min, starting heating, heating to 95-110 ℃, adding triethylamine, then dropwise adding vinyltriethoxysilane at the speed of 0.9-1.4 g/min, continuing to react for 3-6 hours after dropwise adding, cooling to room temperature, discharging, filtering, washing filtrate with deionized water for 2-5 times, and drying in a vacuum drying box at 80-95 ℃ for 2-4 hours to obtain fluorocarbon coated hydrotalcite;
the particle size of the hydrotalcite is 30-300 nm;
the molecular weight of the fluorocarbon resin is 16000-33000 g/mol, the fluorine content is 18-38wt%, the hydroxyl value is 30-55 mgKOH/g, and the acid value is 1-4 mgKOH/g;
the mass ratio of the hydrotalcite to the 1, 4-dioxane to the triethylamine to the fluorocarbon resin to the vinyltriethoxysilane is 35-50:140-180:0.5-1.4:8-18:4-9.
Step 2, preparation of modified lignin
Drying lignin at 90-120 ℃ for 2-3 hours, adding the lignin into a reaction kettle, then adding diethyl formamide, controlling the stirring speed to be 600-1300 revolutions per minute, heating to 130-160 ℃, continuously stirring and dispersing for 1-2 hours in a condensing reflux state, adding hexamethylenetetramine, then adding 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluorodecyl triethoxysilane, continuously stirring and reacting for 4-7 hours, cooling to room temperature, discharging, filtering, washing the filtrate with absolute ethyl alcohol for 3-5 times, and then drying at 60-80 ℃ for 2-4 hours to obtain modified lignin;
the particle size of the lignin is 0.5-6 mu m;
the mass ratio of lignin, diethyl formamide, hexamethylenetetramine, 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluorodecyl triethoxysilane is 20-45:160-180:2-5:1-2.5:2-5.
Step 3, preparation of high weather-proof anti-pollution real stone paint
According to a specific formula of the high weather-resistant and pollution-resistant real stone paint in parts by weight, deionized water, silicone-acrylic emulsion, aqueous fluorocarbon emulsion, dispersing agent, defoaming agent and film forming additive are added into a mixing kettle, the stirring speed is controlled to be 2000-3000 r/min, after stirring for 30-45 min, the stirring speed is increased to 3500-4500 r/min, fluorocarbon coated hydrotalcite and modified lignin are slowly added, after the adding is finished, the stirring speed is reduced to 2000-3000 r/min after continuously stirring for 70-100 min, natural white sand and natural color sand are added, after stirring for 50-80 min, an inorganic thickening agent is added, and after stirring for 40-60 min, discharging is carried out, so that the high weather-resistant and pollution-resistant real stone paint is obtained.
Compared with the prior art, the invention has the following beneficial effects:
1. the hydrotalcite is coated by the fluorocarbon resin, and the weather resistance and the excellent ultraviolet absorption performance of the hydrotalcite are utilized to improve the weather resistance of the real stone paint, and the fluorocarbon resin is coated to greatly reduce the surface energy of a paint film formed by the real stone paint, so that the pollution resistance is improved;
2. the modified lignin prepared by the invention is provided with fluorine-containing functional groups and organic silicon functional groups on the surface, and the functional groups not only can improve the weather resistance of the real stone paint, but also have the characteristic of extremely low surface energy, so that the real stone paint is endowed with extremely good anti-pollution performance, and the lignin has extremely good heat resistance and light aging resistance, so that the weather resistance of the real stone paint can be greatly improved;
3. the aqueous fluorocarbon emulsion and the main film forming substance silicone-acrylate emulsion added in the formula of the real stone paint have good compatibility, the hydroxyl content of the aqueous fluorocarbon emulsion is high, the reactivity is correspondingly high, the aqueous fluorocarbon emulsion plays an important role in improving the workability of the real stone paint and increasing the bonding strength, meanwhile, the fluorocarbon emulsion has very low surface energy and excellent weather resistance, the weather resistance and pollution resistance of the real stone paint can be simultaneously improved, in addition, two inorganic thickeners of magnesium lithium silicate and magnesium aluminum silicate used in the formula of the real stone paint are avoided, the addition of an organic thickener is avoided, the quality of polymers contained in a cured paint film of the real stone paint can be furthest reduced, and the weather resistance of the paint film is furthest improved;
4. the high weather-resistant anti-pollution real stone paint obtained by the invention has the advantages that the state in a container is non-caking, uniform and stable; the construction spraying is free of barriers; drying time (surface drying, hours) is 0.9-1.1 hours; initial dry crack resistance for 5 hours without cracks; the thermal storage stability (15 days) is free from caking, agglomeration and mildew; low temperature storage stability (3 cycles) without caking and without coagulation; the water absorption (2 hours, g) is 0.1-0.2 g; the water resistance is 575-610 hours without abnormality; alkali resistance is 435-454 hours without abnormality; no foaming, crack, peeling and powder falling occur during temperature denaturation (10 times); contamination resistance grade 1; no foaming, cracking and peeling, 0 level pulverization and 0 level discoloration are caused by the artificial weather aging resistance; flexibility, diameter 20mm without crack; the bonding strength is 1.74-1.81 MPa in a standard state, and the freezing and thawing cycle (5 times) is 1.67-1.73 MPa.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and explanation only and is not intended to limit the present invention.
Example 1: high weather-resistant anti-pollution real stone paint
Step 1, preparation of fluorocarbon coated hydrotalcite
Drying hydrotalcite at 90 ℃ for 4 hours, adding the hydrotalcite into a reaction kettle, adding 1, 4-dioxane into the reaction kettle, starting a high-speed dispersing paddle, dispersing for 3 hours at 23000 r/min, adding fluorocarbon resin into the kettle, closing the high-speed dispersing paddle, starting a stirring paddle, controlling the stirring rate to 1100 r/min, starting heating, heating to 105 ℃, adding triethylamine, then dripping vinyltriethoxysilane at a speed of 1.2 g/min, continuing to react for 5 hours, cooling to room temperature, discharging and filtering, washing the filtrate with deionized water for 4 times, and drying for 3.5 hours at 90 ℃ to obtain fluorocarbon coated hydrotalcite;
the particle size of the hydrotalcite is 200nm;
the molecular weight of the fluorocarbon resin is 29000g/mol, the fluorine content is 32wt%, the hydroxyl value is 48mgKOH/g, and the acid value is 2mgKOH/g;
the mass ratio of the hydrotalcite to the 1, 4-dioxane to the triethylamine to the fluorocarbon resin to the vinyltriethoxysilane is 45:170:1:13:7.
Step 2, preparation of modified lignin
Drying lignin at 110 ℃ for 2.6 hours, adding the lignin into a reaction kettle, then adding diethyl formamide, controlling the stirring speed to 1280 r/min, heating to 145 ℃, continuously stirring and dispersing for 1.4 hours under a condensing reflux state, adding hexamethylenetetramine, then adding 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluoro decyl triethoxysilane, continuously stirring and reacting for 5 hours, cooling to room temperature, discharging, filtering, washing the filtrate with absolute ethyl alcohol for 4 times, and then drying at 75 ℃ for 3.5 hours to obtain modified lignin;
the particle size of the lignin is 3 mu m;
the mass ratio of lignin, diethyl formamide, hexamethylenetetramine, 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluorodecyl triethoxysilane is 35:175:4:2:3.
Step 3, preparation of high weather-proof anti-pollution real stone paint
The high weather-resistant anti-pollution real stone paint comprises the following specific formula in parts by weight:
45 parts of natural color sand,
60 parts of natural white sand,
90 parts of silicone-acrylic emulsion,
14 parts of fluorocarbon coated hydrotalcite,
13 parts of modified lignin,
5 parts of aqueous fluorocarbon emulsion,
10 parts of inorganic thickener,
0.6 part of defoamer polyether-siloxane copolymer,
5 parts of dispersant sodium lignin sulfonate,
9 parts of film forming additive propylene glycol methyl ether acetate,
16 parts of deionized water;
the grain diameter of the natural color sand is 80 meshes;
the particle size of the natural white sand is 170 meshes;
the viscosity of the silicone-acrylic emulsion is 700 mPas, the pH value is 8, and the solid content is 52wt%;
the solid content of the aqueous fluorocarbon emulsion is 49 weight percent, the fluorine content is 11 weight percent, the pH value is 8, and the hydroxyl value is 64mgKOH/g;
the particle size of the inorganic thickener is 270 meshes;
the inorganic thickener is lithium magnesium silicate;
adding deionized water, silicone-acrylate emulsion, water-based fluorocarbon emulsion, dispersing agent, defoaming agent and film forming additive into a mixing kettle according to a specific formula in parts by weight of the high weather-resistant and anti-pollution real stone paint, controlling the stirring speed to 2400 rpm, stirring for 40 minutes, then lifting the stirring speed to 3900 rpm, slowly adding fluorocarbon coated hydrotalcite and modified lignin, after the adding, continuously stirring for 90 minutes at a high speed, then reducing the stirring speed to 2600 rpm, adding natural white sand and natural colored sand, stirring for 70 minutes, adding an inorganic thickening agent, stirring for 55 minutes, and discharging to obtain the high weather-resistant and anti-pollution real stone paint.
Example 2: high weather-resistant anti-pollution real stone paint
Step 1, preparation of fluorocarbon coated hydrotalcite
Drying hydrotalcite at 95 ℃ for 5 hours, adding the hydrotalcite into a reaction kettle, adding 1, 4-dioxane into the reaction kettle, starting a high-speed dispersing paddle, dispersing for 4 hours at 25000 r/min, adding fluorocarbon resin into the kettle, closing the high-speed dispersing paddle, starting a stirring paddle, controlling the stirring rate to 1200 r/min, starting heating, heating to 110 ℃, adding triethylamine, then dripping vinyltriethoxysilane at the speed of 1.4 g/min, continuing to react for 6 hours, cooling to room temperature, discharging and filtering, washing the filtrate with deionized water for 5 times, and drying for 4 hours at 95 ℃ to obtain fluorocarbon coated hydrotalcite;
the particle size of the hydrotalcite is 300nm;
the molecular weight of the fluorocarbon resin is 33000g/mol, the fluorine content is 38wt%, the hydroxyl value is 55mgKOH/g, and the acid value is 4mgKOH/g;
the mass ratio of the hydrotalcite to the 1, 4-dioxane to the triethylamine to the fluorocarbon resin to the vinyltriethoxysilane is 50:180:1.4:18:9.
Step 2, preparation of modified lignin
Drying lignin at 120 ℃ for 3 hours, adding the lignin into a reaction kettle, then adding diethyl formamide, controlling the stirring speed to 1300 r/min, heating to 160 ℃, continuously stirring and dispersing for 2 hours in a condensing reflux state, adding hexamethylenetetramine, then adding 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluoro decyl triethoxysilane, continuously stirring and reacting for 7 hours, cooling to room temperature, discharging, filtering, washing the filtrate with absolute ethyl alcohol for 5 times, and then drying at 80 ℃ for 4 hours to obtain modified lignin;
the particle size of the lignin is 6 mu m;
the mass ratio of lignin, diethyl formamide, hexamethylenetetramine, 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluorodecyl triethoxysilane is 45:180:5:2.5:5.
Step 3, preparation of high weather-proof anti-pollution real stone paint
The high weather-resistant anti-pollution real stone paint comprises the following specific formula in parts by weight:
55 parts of natural color sand,
70 parts of natural white sand,
100 parts of silicone-acrylic emulsion,
20 parts of fluorocarbon coated hydrotalcite,
19 parts of modified lignin,
8 parts of aqueous fluorocarbon emulsion,
13 parts of inorganic thickener,
0.7 part of defoamer polyether-siloxane copolymer,
6 parts of dispersant sodium lignin sulfonate,
11 parts of film forming additive propylene glycol methyl ether acetate,
20 parts of deionized water;
the grain diameter of the natural color sand is 100 meshes;
the particle size of the natural white sand is 300 meshes;
the viscosity of the silicone-acrylic emulsion is 950 mPa.s, the pH value is 9, and the solid content is 54wt%;
the solid content of the aqueous fluorocarbon emulsion is 52 weight percent, the fluorine content is 14 weight percent, the pH value is 8.5, and the hydroxyl value is 75mgKOH/g;
the particle size of the inorganic thickener is 300 meshes;
the inorganic thickener is magnesium aluminum silicate;
according to a specific formula of the high weather-resistant and pollution-resistant real stone paint in parts by weight, deionized water, silicone-acrylic emulsion, aqueous fluorocarbon emulsion, dispersing agent, defoaming agent and film forming additive are added into a mixing kettle, the stirring speed is controlled to be 3000 r/min, after stirring for 45 min, the stirring speed is increased to 4500 r/min, fluorocarbon coated hydrotalcite and modified lignin are slowly added, after the adding is finished, stirring is continued for 100 min at a high speed, the stirring speed is reduced to 3000 r/min, natural white sand and natural color sand are added, after stirring for 80 min, inorganic thickening agent is added, and after stirring for 60 min, discharging is carried out, so that the high weather-resistant and pollution-resistant real stone paint is obtained.
Example 3: high weather-resistant anti-pollution real stone paint
Step 1, preparation of fluorocarbon coated hydrotalcite
Drying hydrotalcite at 80 ℃ for 3 hours, adding the hydrotalcite into a reaction kettle, adding 1, 4-dioxane into the reaction kettle, starting a high-speed dispersing paddle, dispersing for 2 hours at 15000 r/min, adding fluorocarbon resin into the kettle, closing the high-speed dispersing paddle, starting a stirring paddle, controlling the stirring rate to 800 r/min, starting heating, heating to 95 ℃, adding triethylamine, then dropwise adding vinyltriethoxysilane at the speed of 0.9 g/min, continuing to react for 3 hours, cooling to room temperature, discharging and filtering, washing the filtrate with deionized water for 2 times, and drying for 2 hours at 80 ℃ to obtain fluorocarbon coated hydrotalcite;
the particle size of the hydrotalcite is 30nm;
the molecular weight of the fluorocarbon resin is 16000g/mol, the fluorine content is 18wt%, the hydroxyl value is 30mgKOH/g, and the acid value is 1mgKOH/g;
the mass ratio of the hydrotalcite to the 1, 4-dioxane to the triethylamine to the fluorocarbon resin to the vinyltriethoxysilane is 35:140:0.5:8:4.
Step 2, preparation of modified lignin
Drying lignin at 90 ℃ for 2 hours, adding the lignin into a reaction kettle, then adding diethyl formamide, controlling the stirring speed to be 600 r/min, heating to 130 ℃, continuously stirring and dispersing for 1 hour under a condensing reflux state, adding hexamethylenetetramine, then adding 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluoro decyl triethoxysilane, continuously stirring and reacting for 4 hours, cooling to room temperature, discharging, filtering, washing the filtrate with absolute ethyl alcohol for 3 times, and then drying at 60 ℃ for 2 hours to obtain modified lignin;
the particle size of the lignin is 0.5 mu m;
the mass ratio of lignin, diethyl formamide, hexamethylenetetramine, 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluorodecyl triethoxysilane is 20:160:2:1:2.
Step 3, preparation of high weather-proof anti-pollution real stone paint
The high weather-resistant anti-pollution real stone paint comprises the following specific formula in parts by weight:
30 parts of natural color sand,
35 parts of natural white sand,
70 parts of silicone-acrylic emulsion,
10 parts of fluorocarbon coated hydrotalcite,
9 parts of modified lignin,
4 parts of aqueous fluorocarbon emulsion,
8 parts of inorganic thickener,
0.3 part of defoamer polyether-siloxane copolymer,
3 parts of dispersant sodium lignin sulfonate,
Film forming additive propylene glycol methyl ether acetate 8 parts,
10 parts of deionized water;
the grain diameter of the natural color sand is 50 meshes;
the grain diameter of the natural white sand is 100 meshes;
the viscosity of the silicone-acrylic emulsion is 250 mPa.s, the pH value is 7, and the solid content is 48wt%;
the solid content of the aqueous fluorocarbon emulsion is 45 weight percent, the fluorine content is 10 weight percent, the pH value is 7, and the hydroxyl value is 55mgKOH/g;
the particle size of the inorganic thickener is 200 meshes;
the inorganic thickener is magnesium aluminum silicate;
according to a specific formula of the high weather-resistant and pollution-resistant real stone paint in parts by weight, deionized water, silicone-acrylic emulsion, aqueous fluorocarbon emulsion, dispersing agent, defoaming agent and film forming additive are added into a mixing kettle, the stirring speed is controlled to be 2000 r/min, after stirring for 30 min, the stirring speed is increased to 3500 r/min, fluorocarbon coated hydrotalcite and modified lignin are slowly added, after the adding is finished, stirring is continued for 70 min at a high speed, the stirring speed is reduced to 2000 r/min, natural white sand and natural color sand are added, after stirring for 50 min, inorganic thickening agent is added, and after stirring for 40 min, discharging is carried out, so that the high weather-resistant and pollution-resistant real stone paint is obtained.
Comparative example 1: based on the example 1, the preparation of the fluorocarbon coated hydrotalcite in the step 1 is not carried out, and 14 parts of fluorocarbon coated hydrotalcite in the step 3 is replaced by 14 parts of silicone-acrylic emulsion in an equivalent way, and the specific operation is as follows:
step 1 is not performed;
step 2 was performed as in example 1;
step 3, preparation of high weather-proof anti-pollution real stone paint
The high weather-resistant anti-pollution real stone paint comprises the following specific formula in parts by weight:
45 parts of natural color sand,
60 parts of natural white sand,
104 parts of silicone-acrylic emulsion,
13 parts of modified lignin,
5 parts of aqueous fluorocarbon emulsion,
10 parts of inorganic thickener,
0.6 part of defoamer polyether-siloxane copolymer,
5 parts of dispersant sodium lignin sulfonate,
9 parts of film forming additive propylene glycol methyl ether acetate,
16 parts of deionized water;
the grain diameter of the natural color sand is 80 meshes;
the particle size of the natural white sand is 170 meshes;
the viscosity of the silicone-acrylic emulsion is 700 mPas, the pH value is 8, and the solid content is 52wt%;
the solid content of the aqueous fluorocarbon emulsion is 49 weight percent, the fluorine content is 11 weight percent, the pH value is 8, and the hydroxyl value is 64mgKOH/g;
the particle size of the inorganic thickener is 270 meshes;
the inorganic thickener is lithium magnesium silicate;
according to a specific formula of the high weather-resistant and anti-pollution real stone paint in parts by weight, deionized water, silicone-acrylic emulsion, aqueous fluorocarbon emulsion, dispersing agent, defoaming agent and film forming additive are added into a mixing kettle, the stirring speed is controlled to 2400 rpm, after stirring for 40 minutes, the stirring speed is increased to 3900 rpm, modified lignin is slowly added, after the adding is finished, stirring is continuously carried out for 90 minutes at a high speed, the stirring speed is reduced to 2600 rpm, natural white sand and natural color sand are added, after stirring for 70 minutes, inorganic thickening agent is added, and after stirring for 55 minutes, the high weather-resistant and anti-pollution real stone paint is obtained.
Comparative example 2: based on the example 1, the preparation of the modified lignin in the step 2 is not carried out, 13 parts of modified lignin is replaced by 13 parts of silicone-acrylic emulsion in the step 3, and the specific operation is as follows:
step 1 the procedure is as in example 1;
step 2 is not performed;
step 3, preparation of high weather-proof anti-pollution real stone paint
The high weather-resistant anti-pollution real stone paint comprises the following specific formula in parts by weight:
45 parts of natural color sand,
60 parts of natural white sand,
103 parts of silicone-acrylic emulsion,
14 parts of fluorocarbon coated hydrotalcite,
5 parts of aqueous fluorocarbon emulsion,
10 parts of inorganic thickener,
0.6 part of defoamer polyether-siloxane copolymer,
5 parts of dispersant sodium lignin sulfonate,
9 parts of film forming additive propylene glycol methyl ether acetate,
16 parts of deionized water;
the grain diameter of the natural color sand is 80 meshes;
the particle size of the natural white sand is 170 meshes;
the viscosity of the silicone-acrylic emulsion is 700 mPas, the pH value is 8, and the solid content is 52wt%;
the solid content of the aqueous fluorocarbon emulsion is 49 weight percent, the fluorine content is 11 weight percent, the pH value is 8, and the hydroxyl value is 64mgKOH/g;
the particle size of the inorganic thickener is 270 meshes;
the inorganic thickener is lithium magnesium silicate;
according to a specific formula of the high weather-resistant and anti-pollution real stone paint in parts by weight, deionized water, silicone-acrylic emulsion, aqueous fluorocarbon emulsion, dispersing agent, defoaming agent and film forming additive are added into a mixing kettle, the stirring speed is controlled to 2400 rpm, after stirring for 40 minutes, the stirring speed is increased to 3900 rpm, fluorocarbon coated hydrotalcite is slowly added, after the adding is finished, stirring is continued for 90 minutes at a high speed, the stirring speed is reduced to 2600 rpm, natural white sand and natural color sand are added, after stirring for 70 minutes, inorganic thickening agent is added, and after stirring for 55 minutes, the high weather-resistant and anti-pollution real stone paint is obtained.
Comparative example 3: based on the embodiment 1, in the preparation of the high weather-resistant anti-pollution real stone paint in the step 3, the water-based fluorocarbon emulsion is not added, and 5 parts of the water-based fluorocarbon emulsion is replaced by 5 parts of silicone-acrylic emulsion in an equivalent way, and the specific operation is as follows:
steps 1 and 2 are the same as in example 1;
step 3, preparation of high weather-proof anti-pollution real stone paint
The high weather-resistant anti-pollution real stone paint comprises the following specific formula in parts by weight:
45 parts of natural color sand,
60 parts of natural white sand,
95 parts of silicone-acrylic emulsion,
14 parts of fluorocarbon coated hydrotalcite,
13 parts of modified lignin,
10 parts of inorganic thickener,
0.6 part of defoamer polyether-siloxane copolymer,
5 parts of dispersant sodium lignin sulfonate,
9 parts of film forming additive propylene glycol methyl ether acetate,
16 parts of deionized water;
the grain diameter of the natural color sand is 80 meshes;
the particle size of the natural white sand is 170 meshes;
the viscosity of the silicone-acrylic emulsion is 700 mPas, the pH value is 8, and the solid content is 52wt%;
the particle size of the inorganic thickener is 270 meshes;
the inorganic thickener is lithium magnesium silicate;
adding deionized water, silicone-acrylic emulsion, a dispersing agent, a defoaming agent and a film-forming auxiliary agent into a mixing kettle according to a specific formula in parts by weight of the high weather-resistant and anti-pollution real stone paint, controlling the stirring speed to 2400 rpm, stirring for 40 minutes, increasing the stirring speed to 3900 rpm, slowly adding fluorocarbon coated hydrotalcite and modified lignin, continuously stirring for 90 minutes after the addition, reducing the stirring speed to 2600 rpm, adding natural white sand and natural colored sand, stirring for 70 minutes, adding an inorganic thickening agent, stirring for 55 minutes, and discharging to obtain the high weather-resistant and anti-pollution real stone paint.
Performance test:
the high weather-resistant and anti-pollution real stone paint obtained in examples 1, 2 and 3 and comparative examples 1, 2 and 3 were subjected to performance tests with reference to JG/T24-2018 synthetic resin emulsion sand wall building paint, the specific data are shown in Table 1 below:
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as can be seen from the data in table 1, in comparative example 1, in which the fluorocarbon-coated hydrotalcite was not added, the water absorption was greater than that of the three examples, the water resistance and alkali resistance were significantly inferior to those of the three examples, the pollution resistance was reduced to level 2, and the artificial weathering resistance was the worst, which indicates that the fluorocarbon-coated hydrotalcite had the greatest effect on improving the weather resistance of the real stone paint, and also had an important effect on the anti-pollution performance; comparative example 2 without modified lignin is similar to comparative example 1, but the water resistance and alkali resistance of comparative example 2 are worse than those of comparative example 1, the pollution resistance of comparative example 2 is worst, and the artificial weather aging resistance is inferior to that of comparative example 1, which shows that the modified lignin can improve the pollution resistance of the real stone paint to the greatest extent, and plays a substantial role in improving the weather resistance of the real stone paint; the comparative example 3 is free from adding the aqueous fluorocarbon emulsion, and the drying time is obviously prolonged, which shows that the aqueous fluorocarbon emulsion can improve the film forming reaction speed of the real stone paint, the water resistance and the alkali resistance are obviously reduced compared with the three examples, the pollution resistance and the weather resistance are far worse than those of the three examples, the flexibility and the bonding strength are worst in all examples and comparative examples, which shows that the high reactivity of the aqueous fluorocarbon emulsion can greatly improve the bonding strength of the real stone paint, improve the flexibility of the real stone paint, and simultaneously have positive improving effect on the weather resistance and the pollution resistance.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. A high weather-resistant anti-pollution real stone paint is characterized in that:
the high weather-resistant anti-pollution real stone paint comprises the following specific formula in parts by weight:
30-55 parts of natural color sand,
35-70 parts of natural white sand,
70-100 parts of silicone-acrylic emulsion,
10-20 parts of fluorocarbon coated hydrotalcite,
9-19 parts of modified lignin,
4-8 parts of aqueous fluorocarbon emulsion,
8-13 parts of inorganic thickener,
0.3-0.7 part of defoamer polyether-siloxane copolymer,
3-6 parts of dispersant sodium lignin sulfonate,
8-11 parts of film forming additive propylene glycol methyl ether acetate,
10-20 parts of deionized water;
the viscosity of the silicone-acrylic emulsion is 250-950 mPa.s, the pH value is 7-9, and the solid content is 48-54 wt%;
the solid content of the aqueous fluorocarbon emulsion is 45-52 wt%, the fluorine content is 10-14 wt%, the pH value is 7-8.5, and the hydroxyl value is 55-75 mgKOH/g;
the particle size of the inorganic thickener is 200-300 meshes;
the inorganic thickener is one of lithium magnesium silicate and aluminum magnesium silicate;
the fluorocarbon coated hydrotalcite comprises the following preparation methods: drying hydrotalcite at 80-95 ℃ for 3-5 hours, adding the hydrotalcite into a reaction kettle, adding 1, 4-dioxane into the reaction kettle, starting a high-speed dispersing paddle, dispersing for 2-4 hours at 15000-25000 r/min, adding fluorocarbon resin into the kettle, closing the high-speed dispersing paddle, starting a stirring paddle, controlling the stirring speed to be 800-1200 r/min, starting heating, heating to 95-110 ℃, adding triethylamine, then dropwise adding vinyltriethoxysilane at the speed of 0.9-1.4 g/min, continuing to react for 3-6 hours after dropwise adding, cooling to room temperature, discharging, filtering, washing filtrate with deionized water for 2-5 times, and drying in a vacuum drying box at 80-95 ℃ for 2-4 hours to obtain fluorocarbon coated hydrotalcite;
the molecular weight of the fluorocarbon resin is 16000-33000 g/mol, the fluorine content is 18-38wt%, the hydroxyl value is 30-55 mgKOH/g, and the acid value is 1-4 mgKOH/g;
the mass ratio of the hydrotalcite to the 1, 4-dioxane to the triethylamine to the fluorocarbon resin to the vinyltriethoxysilane is 35-50:140-180:0.5-1.4:8-18:4-9;
the preparation method of the modified lignin comprises the following steps: drying lignin at 90-120 ℃ for 2-3 hours, adding the lignin into a reaction kettle, then adding diethyl formamide, controlling the stirring speed to be 600-1300 revolutions per minute, heating to 130-160 ℃, continuously stirring and dispersing for 1-2 hours in a condensing reflux state, adding hexamethylenetetramine, then adding 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluorodecyl triethoxysilane, continuously stirring and reacting for 4-7 hours, cooling to room temperature, discharging, filtering, washing the filtrate with absolute ethyl alcohol for 3-5 times, and then drying at 60-80 ℃ for 2-4 hours to obtain modified lignin;
the mass ratio of lignin, diethyl formamide, hexamethylenetetramine, 3-isocyanatopropyl triethoxysilane and 1H, 2H-perfluorodecyl triethoxysilane is 20-45:160-180:2-5:1-2.5:2-5.
2. The high weatherability anti-pollution real stone paint according to claim 1, wherein:
the particle size of the hydrotalcite is 30-300 nm;
the particle size of the lignin is 0.5-6 mu m;
the grain size of the natural color sand is 50-100 meshes;
the particle size of the natural white sand is 100-300 meshes.
3. The high weatherability anti-pollution real stone paint according to claim 1, wherein:
the preparation method of the high weather-resistant anti-pollution real stone paint comprises the following steps: according to a specific formula of the high weather-resistant and pollution-resistant real stone paint in parts by weight, deionized water, silicone-acrylic emulsion, aqueous fluorocarbon emulsion, dispersing agent, defoaming agent and film forming additive are added into a mixing kettle, the stirring speed is controlled to be 2000-3000 r/min, after stirring for 30-45 min, the stirring speed is increased to 3500-4500 r/min, fluorocarbon coated hydrotalcite and modified lignin are slowly added, after the adding is finished, the stirring speed is reduced to 2000-3000 r/min after continuously stirring for 70-100 min, natural white sand and natural color sand are added, after stirring for 50-80 min, an inorganic thickening agent is added, and after stirring for 40-60 min, discharging is carried out, so that the high weather-resistant and pollution-resistant real stone paint is obtained.
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