CN111410893A - Water-based anticorrosive paint for drinking water pipeline and preparation method thereof - Google Patents
Water-based anticorrosive paint for drinking water pipeline and preparation method thereof Download PDFInfo
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- CN111410893A CN111410893A CN202010275084.5A CN202010275084A CN111410893A CN 111410893 A CN111410893 A CN 111410893A CN 202010275084 A CN202010275084 A CN 202010275084A CN 111410893 A CN111410893 A CN 111410893A
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- Prior art keywords
- water
- stirring
- percent
- anticorrosive paint
- drinking water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000003973 paint Substances 0.000 title claims abstract description 56
- 239000003651 drinking water Substances 0.000 title claims abstract description 37
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 37
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000008367 deionised water Substances 0.000 claims abstract description 22
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 22
- 239000003822 epoxy resin Substances 0.000 claims abstract description 20
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 20
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 10
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 9
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims description 91
- 239000011248 coating agent Substances 0.000 claims description 81
- 238000003756 stirring Methods 0.000 claims description 46
- GHBFNMLVSPCDGN-UHFFFAOYSA-N rac-1-monooctanoylglycerol Chemical compound CCCCCCCC(=O)OCC(O)CO GHBFNMLVSPCDGN-UHFFFAOYSA-N 0.000 claims description 42
- 239000000203 mixture Substances 0.000 claims description 37
- CUCUKLJLRRAKFN-UHFFFAOYSA-N 7-Hydroxy-(S)-usnate Chemical group CC12C(=O)C(C(=O)C)C(=O)C=C1OC1=C2C(O)=C(C)C(O)=C1C(C)=O CUCUKLJLRRAKFN-UHFFFAOYSA-N 0.000 claims description 25
- 229940004858 usnic acid Drugs 0.000 claims description 25
- ICTZCAHDGHPRQR-UHFFFAOYSA-N usnic acid Natural products OC1=C(C)C(O)=C(C(C)=O)C2=C1C1(C)C(O)=C(C(=O)C)C(=O)C=C1O2 ICTZCAHDGHPRQR-UHFFFAOYSA-N 0.000 claims description 25
- WEYVVCKOOFYHRW-UHFFFAOYSA-N usninic acid Natural products CC12C(=O)C(C(=O)C)=C(O)C=C1OC1=C2C(O)=C(C)C(O)=C1C(C)=O WEYVVCKOOFYHRW-UHFFFAOYSA-N 0.000 claims description 25
- 229940087068 glyceryl caprylate Drugs 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 12
- FJKROLUGYXJWQN-UHFFFAOYSA-M 4-hydroxybenzoate Chemical compound OC1=CC=C(C([O-])=O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-M 0.000 claims description 11
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 9
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 claims description 9
- 229940070765 laurate Drugs 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229920001223 polyethylene glycol Polymers 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 5
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- 229920000136 polysorbate Polymers 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
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- 229950008882 polysorbate Drugs 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 16
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- 230000000844 anti-bacterial effect Effects 0.000 description 9
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- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 7
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 7
- 239000004721 Polyphenylene oxide Substances 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 description 7
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 7
- 150000007942 carboxylates Chemical class 0.000 description 7
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- 229920000570 polyether Polymers 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 244000005700 microbiome Species 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 5
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 4
- 229920000053 polysorbate 80 Polymers 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 3
- 231100000053 low toxicity Toxicity 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- -1 p-hydroxybenzoate ester Chemical class 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 240000001624 Espostoa lanata Species 0.000 description 2
- 235000009161 Espostoa lanata Nutrition 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 125000005456 glyceride group Chemical group 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 244000125300 Argania sideroxylon Species 0.000 description 1
- 241000228245 Aspergillus niger Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 241000607142 Salmonella Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 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
- 150000001412 amines Chemical class 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004842 bisphenol F epoxy resin Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
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Classifications
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/08—Anti-corrosive 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- 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
- C09D7/20—Diluents or solvents
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Plant Pathology (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a water-based anticorrosive paint for drinking water pipelines, which relates to the technical field of anticorrosive paint, and is prepared from the following components in parts by weight of 5: 1, wherein the component A is prepared from the following components in percentage by weight: 35 to 40 percent of epoxy resin; 19 to 21 percent of titanium dioxide; 18 to 21 percent of filler; 4% -7% of deionized water; 5 to 6 percent of emulsifier; 3% -5% of a leveling agent; 3 to 4 percent of dispersant; 2% -4% of defoaming agent; 0.1 to 0.3 percent of adhesion force intensifier; the rest is auxiliary agent; the component B comprises an aqueous curing agent. The water-based anticorrosive paint for the drinking water pipeline has the advantages of bacterium resistance, corrosion resistance and strong adhesive force. Meanwhile, the invention also correspondingly discloses a preparation method of the water-based anticorrosive paint for the drinking water pipeline, which can promote the components of the paint to be uniformly mixed, so that the prepared water-based anticorrosive paint for the drinking water pipeline has better anticorrosive performance.
Description
Technical Field
The invention relates to the technical field of anticorrosive coatings, in particular to a water-based anticorrosive coating for drinking water pipelines and a preparation method thereof.
Background
Drinking water distribution pipelines, such as large raw water drinking engineering pipelines, direct drinking water pipelines and the like, are generally made of concrete, the inner walls of the pipelines are rough, a plurality of capillary holes exist, the capillary holes provide favorable hiding conditions for microorganisms, bacteria and the like in water, the microorganisms and the bacteria invade the capillary holes on the inner walls of the pipelines to grow and breed, so that microbial films are formed on the pipe walls, the microbial pollution of the pipelines is caused, and the water quality is further polluted. The inner wall of the existing drinking water transmission and distribution pipeline is generally required to be coated with an anticorrosive coating so as to reduce the possibility of polluting drinking water due to corrosion of the pipeline.
The traditional Chinese patent with the publication number of CN105176320B discloses an anti-scouring and anti-drag anti-corrosion coating in a drinking water pipeline, which consists of a liquid A and a liquid B, wherein the liquid A consists of 1 part by weight of modified phenolic epoxy resin, 0.6 part by weight of bisphenol F epoxy resin, 0.8 part by weight of dimethylbenzene, 0.5 part by weight of diacetone alcohol, 0.5 part by weight of n-butyl alcohol, 0.5 part by weight of titanium dioxide, 0.9 part by weight of silica micropowder, 0.5 part by weight of wollastonite powder, 0.5 part by weight of talcum powder, 0.2 part by weight of titanate coupling agent, 0.1 part by weight of polyacrylate solution, 0.1 part by weight of polymethylalkylsiloxane solution, 0.1 part by weight of polyamide wax and 0.1 part by weight of organic bentonite; the solution B is prepared from a mixed solution of 0.9 weight part of amidoamine resin, 0.5 weight part of fatty amine, 0.3 weight part of n-butanol and 0.6 weight part of xylene, and is prepared by mixing 1 weight part of the solution A and 0.3 weight part of the solution B when in use. The anticorrosive paint disclosed in the above patent has good adhesion and abrasion resistance.
The above prior art solutions have the following drawbacks: the anticorrosive coatings of the above publications contain xylene and n-butanol, which are volatile solvents, and the volatilization of these volatile solvents easily causes the coating film to form fine pores during the curing process. The coating of the pipeline inner wall coating is generally in a spraying mode, the arc-shaped inner wall of the pipeline easily causes the flowing of the coating, so that the nonuniformity of the thickness of the coating on the inner wall of the pipeline is easily caused, and the thinner coating part is more easily formed into fine pores due to the volatilization of a solvent, so that when the pipeline is used for conveying water, water molecules are easily dissociated into the pores, the coating is easily expanded due to the long-time soaking of the water, and the coating is easily peeled.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the water-based anticorrosive paint for the drinking water pipeline, wherein a formed coating film has the advantages of level and smooth appearance, no pores, safety, no toxicity, strong bacteria resistance and strong adhesive force.
The above object of the present invention is achieved by the following technical solutions:
a water-based anticorrosive paint for drinking water pipelines comprises the following components in parts by weight of 5: 1, wherein the component A is prepared from the following components in percentage by weight:
35 to 40 percent of epoxy resin;
19 to 21 percent of titanium dioxide;
18 to 21 percent of filler;
4% -7% of deionized water;
5 to 6 percent of emulsifier;
3% -5% of a leveling agent;
3 to 4 percent of dispersant;
2% -4% of defoaming agent;
0.1 to 0.3 percent of adhesion force intensifier;
the rest is auxiliary agent;
the component B comprises an aqueous curing agent.
By adopting the technical scheme, the epoxy resin has excellent chemical resistance, strong coating adhesion, better heat resistance and electrical insulation; the titanium dioxide has the color covering effect on one hand, can improve the physical and chemical properties of the coating, enhance the chemical stability of the coating, improve the covering power, the color reducing power and the light and weather resistance of the coating and enhance the mechanical strength and the adhesive force of a coating film on the other hand; the hardness and the corrosion prevention effect of the coating can be improved by using the filler; the deionized water does not contain calcium, magnesium and other ions, and compared with common water, the influence of the calcium, magnesium and other ions on the stability of the paint liquid is reduced; the leveling agent is utilized to promote the coating to form a flat and smooth coating film in the drying film-forming process, so that the possibility of pore formation is reduced; the dispersing agent is utilized to promote the dispersion of related components in the coating, so that the coating has better stability, and meanwhile, the glossiness, the transparency and the saturation of the coating can be improved; the defoaming agent is utilized to inhibit the generation of bubbles and accelerate the breaking of the generated bubbles, thereby being beneficial to the production of the coating and the coating effect and performance during coating of the coating; the adhesive force of the coating is enhanced by the adhesive force enhancer, so that the possibility of stripping of the coating is reduced; the adhesion of the coating film is further enhanced by the auxiliary agent. Compared with the prior art, the scheme utilizes the synergistic effect of the components, so that the formed coating film has a smooth appearance and strong adhesive force, the possibility of forming pores and separating from the pipeline is reduced, and the possibility of corrosion of the pipeline is reduced.
The present invention in a preferred example may be further configured to: the adhesion force enhancer is usnic acid.
By adopting the technical scheme, the usnic acid is non-toxic, non-corrosive, non-volatile and harmless to human bodies, and the physical performance of the coating can be improved in the scheme; the usnic acid contains more polar groups such as hydroxyl and carbonyl, the polar groups contained in molecules in the paint can influence the adhesive force of a paint film, and the adhesive force of the paint film is increased along with the increase of the polarity of the paint film, so that the polar groups in the usnic acid can enhance the adhesive force of the paint and reduce the possibility of separation of the paint and a pipeline; in addition, the usnic acid has wide antimicrobial spectrum and good stability, has excellent inhibition effect on various bacteria, and can reduce the possibility that the bacteria or microorganisms in the soil erode the pipeline.
The present invention in a preferred example may be further configured to: the auxiliary agent comprises 1 to 1.5 weight percent of p-hydroxybenzoate and 0.3 to 0.8 weight percent of glyceryl monocaprylate which account for the component A.
By adopting the technical scheme, the polar groups such as hydroxyl and carbonyl contained in the p-hydroxybenzoate and the glyceryl monocaprylate can enhance the adhesive force of the coating and reduce the possibility of stripping of the coating. In addition, the p-hydroxybenzoate can destroy the cell membrane of the microorganism, denature protein in the cell, inhibit the activities of a respiratory enzyme system and an electron transfer enzyme system of the microorganism cell, effectively inhibit microorganisms or bacteria in water from eroding the inner wall of the pipeline, and reduce the possibility of forming a microbial film on the inner wall of the pipeline; the monocaprylic glyceride has wide antibacterial spectrum and can inhibit various bacteria, and meanwhile, the monocaprylic glyceride can also be used as an emulsifier to promote the mixing of related components in the coating to a certain extent, so that the antibacterial and corrosion-resistant properties of the coating are enhanced. The mixed amount of the glyceryl monocaprylate, the p-hydroxybenzoate and the usnic acid has the effects of synergistically improving the adhesive force of the coating and resisting bacteria, effectively improves the bacteria and corrosion resistance of the coating, and enables the coating to play a role in corrosion protection on a pipeline for a long time.
The present invention in a preferred example may be further configured to: the emulsifier is one or more selected from polyethylene glycol laurate and polysorbate.
By adopting the technical scheme, the emulsifier is utilized to reduce the surface tension of the solution and promote the uniform mixing of the components, so that the prepared coating has better performance.
The present invention in a preferred example may be further configured to: the filler is selected from one or more of talcum powder, barium sulfate, calcium hydrophosphate and mica powder.
By adopting the technical scheme, the mechanical strength of the coating film is enhanced by using the filler, such as the wear resistance and the durability of the coating film are improved; the filler can play a role in skeleton and filling in the coating, and the thickness of the coating film is increased.
The present invention in a preferred example may be further configured to: the aqueous curing agent is selected from one or more of 120 curing agents, 593 curing agents, 703 curing agents and 793 curing agents.
By adopting the technical scheme, the 120 curing agent has stronger water absorption, low toxicity and quick reaction with the epoxy resin; 593 the curing agent has low toxicity, fast curing at room temperature, and good toughness of the cured product; 703 the curing agent and the epoxy resin have faster reaction speed, and the performance of a cured product is good; 793 the curing agent has low toxicity, good toughness of the cured product and good bonding performance to metal.
The invention also provides a preparation method of the water-based anticorrosive paint for the drinking water pipeline, which comprises the following steps:
s1, emulsification: mixing the epoxy resin and the emulsifier according to the formula amount, stirring at the speed of 250r/min, and stirring at the temperature of 55-65 ℃ for 1-1.5 h to obtain a first-grade mixture; dropwise adding deionized water into the primary mixture under the condition of continuous heat preservation and stirring, increasing the stirring speed to 800-1000 r/min, and continuously stirring for 30-35 min to obtain a secondary mixture;
s2, mixing: adding titanium dioxide, a filler, a leveling agent, a dispersing agent and a defoaming agent into the secondary mixture according to the formula amount, stirring at the speed of 800-1000 r/min, and stirring at the temperature of 60 ℃ for 25-35 min to obtain a tertiary mixture; putting the adhesion force enhancer and the auxiliary additive into the third-level mixture, stirring for 20-30 min, and cooling to room temperature to obtain a fourth-level mixture;
s3, grinding: and grinding the four-stage mixture to the fineness of 20-30 mu m to obtain the component A, and mixing and stirring the component A and the component B uniformly according to the weight ratio during construction to obtain the water-based anticorrosive paint for the drinking water pipeline.
By adopting the technical scheme, the epoxy resin forms an emulsified solution by using the emulsifier, so that the epoxy resin and other related components can be mixed conveniently; deionized water is added into the pulling cylinder in a dropwise manner, and the heating and stirring can promote the reaction and the uniform mixing of related components in the coating, and the fineness of the coating can be increased by grinding, so that the prepared coating can meet the quality requirements of enterprises.
The present invention in a preferred example may be further configured to: in the step S1, 50% of deionized water is firstly added dropwise to the primary mixture within 1 hour, and then the remaining 50% of deionized water is added dropwise to the primary mixture within 0.5 hour.
By adopting the technical scheme, the deionized water is divided into two parts and added into the first-stage mixture, which is beneficial to the full and uniform mixing of the epoxy resin and the emulsifier.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the water-based anticorrosive paint for the drinking water pipeline disclosed by the invention does not contain volatile solvent components, and a formed coating is flat, smooth and pore-free and has better corrosion resistance;
2. by adding the p-hydroxybenzoate, the glyceryl monocaprylate and the usnic acid, the coating has stronger adhesive force and better antibacterial property.
Detailed Description
Example one
The invention discloses a water-based anticorrosive paint for drinking water pipelines, which comprises the following raw materials:
(1) the component A is prepared from the following components: 350g of epoxy resin; 210g of titanium dioxide; 210g of talcum powder; 60g of deionized water; 30g of polyethylene glycol laurate; tween 8030 g; 30g of carboxymethyl cellulose; 30g of carboxylate dispersant; 33g of polyether defoamer; 10g of p-hydroxybenzoate ester; 5g of glycerol monocaprylate; 2g of usnic acid.
(2) The component B comprises the following components: 120 g of curing agent and 703 g of curing agent.
The preparation method of the water-based anticorrosive paint for the drinking water pipeline in the embodiment comprises the following steps:
s1, emulsification: putting epoxy resin, polyethylene glycol laurate and tween 80 into a drawing cylinder according to the formula amount, stirring at the speed of 250r/min, and stirring for 1h at the temperature of 60 ℃ to obtain a first-level mixture; under the state of continuous heat preservation and stirring, firstly, 30g of deionized water is dripped into the pulling cylinder within 1 hour, then 30g of deionized water is dripped into the pulling cylinder within 0.5 hour, then the stirring speed is increased to 900 r/min, and the stirring is continued for 30min, so as to obtain a secondary mixture;
s2, mixing: adding titanium dioxide, talcum powder, carboxymethyl cellulose, carboxylate dispersing agent and polyether defoaming agent into a pulling cylinder according to the formula amount, stirring at the speed of 900 r/min, and stirring at the temperature of 60 ℃ for 35min to obtain a third-stage mixture;
putting p-hydroxybenzoate, glyceryl monocaprylate and usnic acid into a pulling cylinder, stirring for 25min, and cooling to room temperature to obtain a four-stage mixture;
s3, grinding: putting the four-stage mixture into a sand mill, and grinding to the fineness of 25 mu m to obtain a component A; and (3) putting the 120 curing agent and the 703 curing agent into another pulling cylinder, stirring at the speed of 900 r/min for 20min to obtain the component B. During construction, the component A and the component B are mixed and stirred uniformly according to the weight ratio to obtain the water-based anticorrosive paint for the drinking water pipeline.
Example two
The invention discloses a water-based anticorrosive paint for drinking water pipelines, which comprises the following raw materials:
(1) the component A is prepared from the following components: 400g of epoxy resin; 200g of titanium dioxide; 200g of talcum powder; 50g of deionized water; 30g of polyethylene glycol laurate; tween 8020 g; 30g of carboxymethyl cellulose; 30g of carboxylate dispersant; 20g of polyether defoamer; 14g of p-hydroxybenzoate ester; 4g of glycerol monocaprylate; 2g of usnic acid.
(2) The component B comprises the following components: 120 g of curing agent and 703 g of curing agent.
The preparation method of the water-based anticorrosive paint for the drinking water pipeline in the embodiment comprises the following steps:
s1, emulsification: putting epoxy resin, polyethylene glycol laurate and tween 80 into a drawing cylinder according to the formula amount, stirring at the speed of 250r/min, and stirring for 1h at the temperature of 60 ℃ to obtain a first-level mixture; under the state of continuous heat preservation and stirring, firstly, 25g of deionized water is dripped into the pulling cylinder within 1 hour, then 25g of deionized water is dripped into the pulling cylinder within 0.5 hour, then the stirring speed is increased to 900 r/min, and the stirring is continued for 30min, so as to obtain a secondary mixture;
s2, mixing: adding titanium dioxide, talcum powder, carboxymethyl cellulose, carboxylate dispersing agent and polyether defoaming agent into a pulling cylinder according to the formula amount, stirring at the speed of 900 r/min, and stirring at the temperature of 60 ℃ for 35min to obtain a third-stage mixture;
putting p-hydroxybenzoate, glyceryl monocaprylate and usnic acid into a pulling cylinder, stirring for 25min, and cooling to room temperature to obtain a four-stage mixture;
s3, grinding: putting the four-stage mixture into a sand mill, and grinding to the fineness of 25 mu m to obtain a component A; and (3) putting the 120 curing agent and the 703 curing agent into another pulling cylinder, stirring at the speed of 900 r/min for 20min to obtain the component B. During construction, the component A and the component B are mixed and stirred uniformly according to the weight ratio to obtain the water-based anticorrosive paint for the drinking water pipeline.
EXAMPLE III
The invention discloses a water-based anticorrosive paint for drinking water pipelines, which comprises the following raw materials:
(1) the component A is prepared from the following components: 380g of epoxy resin; 190g of titanium dioxide; 180g of talcum powder; 40g of deionized water; 30g of polyethylene glycol laurate; tween 8030 g; 50g of carboxymethyl cellulose; 40g of carboxylate dispersant; 40g of polyether defoamer; 10g of p-hydroxybenzoate ester; 7g of glycerol monocaprylate; usnic acid 3 g.
(2) The component B comprises the following components: 120 g of curing agent and 703 g of curing agent.
The preparation method of the water-based anticorrosive paint for the drinking water pipeline in the embodiment comprises the following steps:
s1, emulsification: putting epoxy resin, polyethylene glycol laurate and tween 80 into a drawing cylinder according to the formula amount, stirring at the speed of 250r/min, and stirring for 1h at the temperature of 60 ℃ to obtain a first-level mixture; under the state of continuous heat preservation and stirring, firstly, 20g of deionized water is dripped into the pulling cylinder within 1 hour, then, 20g of deionized water is dripped into the pulling cylinder within 0.5 hour, then, the stirring speed is increased to 900 r/min, and the stirring is continued for 30min, so that a secondary mixture is obtained;
s2, mixing: adding titanium dioxide, talcum powder, carboxymethyl cellulose, carboxylate dispersing agent and polyether defoaming agent into a pulling cylinder according to the formula amount, stirring at the speed of 900 r/min, and stirring at the temperature of 60 ℃ for 35min to obtain a third-stage mixture;
putting p-hydroxybenzoate, glyceryl monocaprylate and usnic acid into a pulling cylinder, stirring for 25min, and cooling to room temperature to obtain a four-stage mixture;
s3, grinding: putting the four-stage mixture into a sand mill, and grinding to the fineness of 25 mu m to obtain a component A; and (3) putting the 120 curing agent and the 703 curing agent into another pulling cylinder, stirring at the speed of 900 r/min for 20min to obtain the component B. During construction, the component A and the component B are mixed and stirred uniformly according to the weight ratio to obtain the water-based anticorrosive paint for the drinking water pipeline.
Example four
The difference between this example and the second example is that the amount of p-hydroxybenzoic ester added is 2g, the amount of glyceryl monocaprylate added is 12g, and the amount of usnic acid added is 6 g.
EXAMPLE five
This example differs from example two in that the amount of paraben added is 17g, glyceryl monocaprylate added is 2.5g, and usnic acid added is 0.5 g.
In the invention, bisphenol A type epoxy resin is selected as the epoxy resin, and is purchased from International trade of Argan (Shanghai) Co., Ltd; titanium dioxide was purchased from the Shanghai Yangtze titanium dioxide chemical products, Inc.; talcum powder was purchased from Shanghai Michelin Biochemical technology, Inc.; deionized water was purchased from Shanghai Bigdi pharmaceutical science, Inc.; polyethylene glycol laurate was purchased from Shanghai Michelin Biotech, Inc.; tween 80 was purchased from shanghai alatin biochemical science and technology, inc; carboxymethyl cellulose was purchased from jiaweigher pharmaceuticals ltd, yuqing, wuhan; the carboxylate dispersant is SN-DISPERANT 5027 dispersant and is purchased from Guangzhou Hengyu chemical industry Co., Ltd; polyether defoamers were purchased from federal fine limited, guangdong; parabens were purchased from stoichiometrical (shanghai) ltd; glyceryl monocaprylate was purchased from my chemical technologies, inc; usnic acid was purchased from michelil chemical technologies, ltd, shanghai; 120 curing agent purchased from Qi Xu (narrative) chemical Limited, Guangzhou; 703 curing agents were purchased from Huangqi glass, Inc. in the south China sea, Foshan.
Comparison example 1
The comparative example is different from example two in that paraben, glyceryl monocaprylate and usnic acid are not added to the comparative example.
Comparative example two
The comparative example is different from example two in that paraben and glyceryl monocaprylate are not added.
Comparative example three
The difference between this comparative example and the second example is that usnic acid was not added to this comparative example.
Comparative example four
The comparative example is different from example two in that glycerol monocaprylate and usnic acid are not added.
Comparative example five
The comparative example is different from the second example in that no paraben and usnic acid are added.
Comparative example six
Example 2 in the comparison document (CN 105176320B) is taken as a sixth comparison example.
The anticorrosive coatings prepared in the first to fifth examples and the first to sixth comparative examples are subjected to performance tests, and the test processes are as follows:
test one: and respectively coating the anticorrosive coatings on the test board, standing for 48h, and visually inspecting the painted surfaces under scattered sunlight. If the paint film is flat and has no obvious sagging, wrinkling and pinhole phenomena, the paint film is considered to have normal appearance.
And (2) test II: adhesion determination by cross-hatch method
The paint was applied to the panels, dried for 16 hours, and the panels were scribed using a scriber. After grid marking, comparing and grading the standard with the description drawing by using a magnifying glass;
the criteria are as follows:
level 0: the cutting edge is completely smooth, and no lattice falls off;
level 1: a little coating at the intersection drops off, and the affected area cannot be obviously more than 5%;
and 2, stage: the coating falls off at the intersection of the cuts or along the edges of the cuts, and the influence area is 5 to 15 percent;
and 3, level: the coating falls off in large area along the cutting edge part or the whole, and the affected cross cutting area is 15-35%;
4, level: the coating is along the cutting edge, large fragments are peeled off, or some grids are partially or completely peeled off, and the affected area is 35-65%;
and 5, stage: severe exfoliation of greater than grade 4.
And (3) test III: acid resistance test
Two samples (with an interval of 24 h) were applied to both sides of the test panel, respectively, and left for 24 h. The test piece was coated with a film on the periphery thereof, and the coated piece was sealed with a sample having a width of 5mm or more and left for 6 days. The test panels were then dipped successively around the circumference in molten paraffin: the rosin is 1: 1, the first overlap is 3mm and the 2 nd overlap is 5 mm. After 1 hour of standing, the panels were placed in sulfuric acid (5 (W/V)%) and tested according to GB/T9274.
And (4) judging the standard: if the coating film of 3 or more test panels out of 5 test panels corresponding to each paint did not show any blistering, peeling and rusting, it was considered that "the paint film immersed in alkali was not abnormal". In the test, the abnormal rate of the paint film of each anticorrosive paint is recorded, and the abnormal rate = the number of test panels/5 × 100% of the paint film without abnormality.
And (4) testing: alkali resistance test
Two samples (with an interval of 24 h) were applied to both sides of the test panel, respectively, and left for 24 h. The test piece was coated with a film on the periphery thereof, and the coated piece was sealed with a sample having a width of 5mm or more and left for 6 days. The test panels were then dipped successively around the circumference in molten paraffin: the rosin is 1: 1, the first overlap is 3mm and the 2 nd overlap is 5 mm. After standing for 1h, the panels were placed in NaOH solution (5 (W/V)%) and tested according to GB/T9274.
And (4) judging the standard: if the coating film of 3 or more test panels out of 5 test panels corresponding to each paint did not show any blistering, peeling and elution, it was considered that "the paint film immersed in alkali was not abnormal". In the test, the abnormal rate of the paint film of each anticorrosive paint is recorded, and the abnormal rate = the number of test panels/5 × 100% of the paint film without abnormality.
And (5) testing: drying time test
(1) Surface drying time determination: the surface drying time of each anticorrosive coating was measured at room temperature according to the cotton ball blowing method in GB/T1728.
(2) And (3) measuring the actual drying time: the surface drying time of each anticorrosive coating was measured at room temperature according to the cotton ball blowing method in GB/T1728.
And (6) test six: determination of VOC
VOC measurements were made on the anticorrosive coatings in each example and each control example according to U.S. Standard GB 18582-2008. Weighing 20g of anticorrosive paint in an aluminum plate with the weighed weight, then placing the plate in an oven with forced air circulation to heat the plate to 110 ℃, and continuously drying the anticorrosive paint for 1 hour at the temperature of 110 ℃. The dried anticorrosive paint was weighed again, and the VOC content was calculated from the weight of the anticorrosive paint before and after drying, VOC content = (initial weight-final weight)/initial weight 100%.
Test seven: determination of neutral salt spray resistance
The neutral salt spray resistance of each coating was determined according to standard GB/T1771-91.
And (eight) test: freeze-thaw cycle resistance measurement
The freeze-thaw resistance of each anticorrosive coating was determined according to standard GB 9154-88. In the test, 6 test plates were selected in each of the examples and comparative examples, and at least 3 test plates were qualified without any powdering, cracking, peeling, bubbling, significant discoloration, etc. In this test, the yield of each of the examples and the control example was recorded, and the yield = number of qualified test panels/6 × 100%.
Note: the test plates in the first test to the eighth test are all arc-shaped, and the anticorrosive coatings are sprayed on the side surfaces of the depressions of the test plates in a spraying mode.
The results of runs one through eight are shown in table one:
as can be seen from the table I, compared with the sixth comparative example, the coating films in the first to fifth examples have flat and smooth appearance and no pore formation, and the acid resistance, alkali resistance and salt spray resistance are superior to those of the sixth comparative example, which indicates that the anticorrosive coating disclosed by the invention has superior anticorrosive performance. In addition, the VOC content of the coatings in examples one to five is significantly lower than that of the coating in comparative example six, which shows that the coatings disclosed by the invention have extremely low volatile substances and have small influence on the environment and human bodies.
Compared with the first control example, the appearance and the adhesive force of the coating films in the second control example to the fifth control example are superior to those of the first control example, which shows that the added p-hydroxybenzoate, glyceryl monocaprylate and usnic acid can enhance the adhesive force of the coating films to a certain extent. Compared with the first to fifth comparative examples, the appearance and the adhesive force of the coating film in the first to third examples are superior to those of the first to fifth comparative examples, which shows that the adhesive force of the coating film can be effectively enhanced to a certain extent by using the parabens, the glyceryl monocaprylate and the usnic acid in combination, so that the possibility of separation of the coating film from the inner wall of the pipeline is reduced.
Compared with the fourth to fifth examples, the coating films in the first to third examples have better adhesion, faster drying time, lower VOC content and better salt spray resistance, which shows that the coating prepared according to the mixture ratio of the components disclosed in the invention can have better performance.
Test nine: respectively spraying the anticorrosive coatings of the first to third embodiments and the first to sixth comparative embodiments on the concave side surfaces of the arc-shaped test plates, and respectively immersing the test plates in drinking water for 18 months to serve as blank groups;
the anticorrosive coatings of the first to third examples and the first to sixth comparative examples were respectively sprayed on the concave side surfaces of the arc-shaped test panels, and the test panels were respectively immersed in drinking water containing bacteria such as escherichia coli, aspergillus niger, salmonella for 18 months to serve as test groups.
And (4) judging the standard: if the coating film of 4 or more test panels out of 6 test panels corresponding to each coating material does not show the phenomenon of foaming, peeling and elution, it is considered that "the antibacterial property is normal". In this test, the coating film of each anticorrosive paint was recorded as having no abnormality, where no abnormality = number of test pieces/6 × 100% where the coating film had no abnormality.
The test results are shown in table two:
as can be seen from table two, compared with the sixth comparative example, the coating films in the first to third examples have higher abnormal rate than the sixth comparative example, which indicates that the coating disclosed by the invention has better antibacterial performance and can reduce the possibility of corrosion of the pipeline caused by bacteria.
Compared with the first control example, the coating films of the second control example to the fifth control example in the blank group and the test group have better antibacterial performance, which shows that the antibacterial performance of the coating can be enhanced to a certain extent by adding the p-hydroxybenzoate, the glyceryl monocaprylate and the usnic acid.
Compared with the first and fifth comparative examples, the coating films in the first to third examples have better antibacterial performance, which shows that the added hydroxybenzoate, glyceryl monocaprylate and usnic acid can act synergistically, so that the antibacterial performance of the coating can be effectively enhanced, and the possibility of corrosion of pipelines can be reduced.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. A water-based anticorrosive paint for drinking water pipelines is characterized in that: the weight ratio of (5): 1, wherein the component A is prepared from the following components in percentage by weight:
35 to 40 percent of epoxy resin;
19 to 21 percent of titanium dioxide;
18 to 21 percent of filler;
4% -7% of deionized water;
5 to 6 percent of emulsifier;
3% -5% of a leveling agent;
3 to 4 percent of dispersant;
2% -4% of defoaming agent;
0.1 to 0.3 percent of adhesion force intensifier;
the rest is auxiliary agent;
the component B comprises an aqueous curing agent.
2. The water-based anticorrosive paint for drinking water pipelines according to claim 1, characterized in that: the adhesion force enhancer is usnic acid.
3. The water-based anticorrosive paint for drinking water pipelines according to claim 1, characterized in that: the auxiliary agent comprises 1 to 1.5 weight percent of p-hydroxybenzoate and 0.3 to 0.8 weight percent of glyceryl monocaprylate which account for the component A.
4. The water-based anticorrosive paint for drinking water pipelines according to claim 1, characterized in that: the emulsifier is one or more selected from polyethylene glycol laurate and polysorbate.
5. The water-based anticorrosive paint for drinking water pipelines according to claim 1, characterized in that: the filler is selected from one or more of talcum powder, barium sulfate, calcium hydrophosphate and mica powder.
6. The water-based anticorrosive paint for drinking water pipelines according to claim 1, characterized in that: the aqueous curing agent is selected from one or more of 120 curing agents, 593 curing agents, 703 curing agents and 793 curing agents.
7. The method for preparing an aqueous anticorrosive coating for drinking water pipelines according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1, emulsification: mixing the epoxy resin and the emulsifier according to the formula amount, stirring at the speed of 250r/min, and stirring at the temperature of 55-65 ℃ for 1-1.5 h to obtain a first-grade mixture; dropwise adding deionized water into the primary mixture under the condition of continuous heat preservation and stirring, increasing the stirring speed to 800-1000 r/min, and continuously stirring for 30-35 min to obtain a secondary mixture;
s2, mixing: adding titanium dioxide, a filler, a leveling agent, a dispersing agent and a defoaming agent into the secondary mixture according to the formula amount, stirring at the speed of 800-1000 r/min, and stirring at the temperature of 60 ℃ for 25-35 min to obtain a tertiary mixture; putting the adhesion force enhancer and the auxiliary additive into the third-level mixture, stirring for 20-30 min, and cooling to room temperature to obtain a fourth-level mixture;
s3, grinding: and grinding the four-stage mixture to the fineness of 20-30 mu m to obtain the component A, and mixing and stirring the component A and the component B uniformly according to the weight ratio during construction to obtain the water-based anticorrosive paint for the drinking water pipeline.
8. The method for preparing the water-based anticorrosive paint for drinking water pipelines according to claim 7, wherein: in the step S1, 50% of deionized water is firstly added dropwise to the primary mixture within 1 hour, and then the remaining 50% of deionized water is added dropwise to the primary mixture within 0.5 hour.
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