CN116478600A - Water-based bi-component corrosion-resistant paint and preparation method thereof - Google Patents
Water-based bi-component corrosion-resistant paint and preparation method thereof Download PDFInfo
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- 239000003973 paint Substances 0.000 title claims abstract description 98
- 238000005260 corrosion Methods 0.000 title claims abstract description 76
- 230000007797 corrosion Effects 0.000 title claims abstract description 76
- 238000002360 preparation method Methods 0.000 title claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 203
- 238000002156 mixing Methods 0.000 claims abstract description 74
- 238000003756 stirring Methods 0.000 claims abstract description 65
- 239000003822 epoxy resin Substances 0.000 claims abstract description 44
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 44
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 43
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 37
- -1 polysiloxane Polymers 0.000 claims abstract description 34
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 32
- 239000012948 isocyanate Substances 0.000 claims abstract description 25
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 13
- 239000000049 pigment Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 11
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 11
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 11
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 10
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 10
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 150000002191 fatty alcohols Chemical class 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 41
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000013530 defoamer Substances 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 30
- 150000003839 salts Chemical class 0.000 description 25
- 239000007864 aqueous solution Substances 0.000 description 22
- 239000007787 solid Substances 0.000 description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 20
- 239000002994 raw material Substances 0.000 description 20
- 239000000243 solution Substances 0.000 description 20
- 239000002253 acid Substances 0.000 description 18
- 239000003513 alkali Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 18
- 238000001514 detection method Methods 0.000 description 16
- 239000007921 spray Substances 0.000 description 16
- 238000001816 cooling Methods 0.000 description 11
- 238000001035 drying Methods 0.000 description 11
- 238000001914 filtration Methods 0.000 description 11
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical compound O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 description 11
- 238000005406 washing Methods 0.000 description 11
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 238000007405 data analysis Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical group N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 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
- 239000011248 coating agent Substances 0.000 description 2
- 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 description 2
- XQSFXFQDJCDXDT-UHFFFAOYSA-N hydroxysilicon Chemical compound [Si]O XQSFXFQDJCDXDT-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229920001558 organosilicon polymer Polymers 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- FCZCIXQGZOUIDN-UHFFFAOYSA-N ethyl 2-diethoxyphosphinothioyloxyacetate Chemical compound CCOC(=O)COP(=S)(OCC)OCC FCZCIXQGZOUIDN-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 125000005373 siloxane group Chemical group [SiH2](O*)* 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
-
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The application relates to the technical field of coatings, in particular to a water-based bi-component corrosion-resistant paint and a preparation method thereof. An aqueous two-component corrosion-resistant paint comprises a component A and a component B; the component A comprises, by weight, 50-60 parts of aqueous epoxy resin, 10-15 parts of modified silicon dioxide, 10-40 parts of water and 1-2 parts of defoamer; the component B comprises 25-40 parts of curing agent, 20-30 parts of filler and 10-20 parts of pigment in parts by weight; the preparation method of the modified silicon dioxide comprises the following steps: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate, then adding the hydroxylated silicon dioxide, and stirring and mixing to obtain the modified silicon dioxide. The application adopts hydroxyl polysiloxane and isocyanate to modify silicon dioxide, introduces an organosilicon chain segment and a urethane bond into paint, improves the flexibility and corrosion resistance of a cured paint film, and is beneficial to prolonging the service life of a charging device.
Description
Technical Field
The application relates to the technical field of coatings, in particular to a water-based bi-component corrosion-resistant paint and a preparation method thereof.
Background
The charging pile is a charging device for providing energy for electric vehicles, is generally installed in communities, public communities, underground parking lots and outdoor parking lots, and can charge electric vehicles of various types according to different voltage levels.
The shell of the charging pile is coated with a layer of paint, so that the charging pile can be protected, decorated and marked. However, the charging pile is installed in outdoor environments such as communities, public communities, outdoor parking lots and the like, and is easily wetted by rainwater and corrodes the charging pile housing, so that pulverization, peeling and foaming of the charging pile housing occur.
Disclosure of Invention
In order to improve the corrosion resistance of the charging pile shell, the application provides a water-based bi-component corrosion-resistant paint and a preparation method thereof.
In a first aspect, the present application provides an aqueous two-component corrosion-resistant paint, which adopts the following technical scheme:
an aqueous two-component corrosion-resistant paint comprises a component A and a component B;
the component A comprises the following components in parts by weight:
50-60 parts of aqueous epoxy resin;
10-15 parts of modified silicon dioxide;
10-40 parts of water;
1-2 parts of a defoaming agent;
the component B comprises the following components in parts by weight:
25-40 parts of curing agent;
20-30 parts of filler;
10-20 parts of pigment;
the preparation method of the modified silicon dioxide comprises the following steps: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate, then adding the hydroxylated silicon dioxide, and stirring and mixing to obtain the modified silicon dioxide.
By adopting the technical scheme, the hydroxyl polysiloxane and isocyanate react, and the obtained mixture contains both a siloxane group and an isocyanic acid group. Then, isocyanate groups in the mixture react with hydroxyl groups on the surface of the silicon dioxide, and an organosilicon polymer containing urethane bonds is grafted on the surface of the silicon dioxide. After the raw materials such as the modified silicon dioxide and the water-based epoxy resin are solidified, on one hand, the organic silicon chain segments introduced into the modified silicon dioxide improve the flexibility of the paint film and the acid resistance and the alkali resistance of the paint film. On the other hand, the urethane bonds introduced in the modified silicon dioxide have strong intermolecular force and compact molecular space arrangement, which is beneficial to improving the compactness of the coating film, reducing the penetration of corrosive medium and improving the corrosion resistance of the coating film. Meanwhile, a paint film containing the aqueous epoxy resin can form physical shielding on the surface of the substrate, so that corrosion factors cannot reach the base material, and the corrosion resistance of the paint film is further improved. Therefore, the paint is painted on the outer side of the charging device such as the charging pile, so that the corrosion resistance of the charging device can be improved, and the service life of the charging device can be prolonged.
Preferably, the viscosity of the hydroxy polysiloxane is 70-1500mpa.s.
By adopting the technical scheme, the hydroxyl polysiloxane with the viscosity is reacted with isocyanate, and the viscosity of the obtained mixture changes certain due to the lower viscosity of the hydroxyl polysiloxane, so that the mixture and the hydroxylated silicon dioxide can be fully mixed, the grafting rate of the mixture on the hydroxylated silicon dioxide is improved, and the corrosion resistance and flexibility of a paint film are improved.
Preferably, the preparation method of the modified silicon dioxide comprises the following steps: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate for 2-4 hours at 100-120 ℃, then adding the hydroxylated silicon dioxide, and stirring and mixing for 2-4 hours to obtain the modified silicon dioxide.
By adopting the technical scheme, the reaction temperature and the reaction time are optimized, the reaction degree of the hydroxyl polysiloxane and isocyanate can be controlled, and the obtained mixture contains partial isocyanic acid groups to react with hydroxyl groups on the surface of the hydroxylated silicon dioxide, so that the grafting rate of the mixture on the hydroxylated silicon dioxide is improved, and the corrosion resistance and flexibility of a paint film are further improved.
Preferably, in the preparation method of the modified silicon dioxide, the weight ratio of the hydroxylated silicon dioxide to the hydroxyl polysiloxane to the isocyanate is 1 (0.3-0.5) to 0.2-0.4.
By adopting the technical scheme, in the preparation method of the modified silicon dioxide, the weight proportion of the hydroxylated silicon dioxide, the hydroxyl polysiloxane and the isocyanate is optimized, and the surface of the obtained modified silicon dioxide not only contains the organosilicon chain segment with the urethane bond, but also contains partial hydroxyl groups, so that the modified silicon dioxide has water solubility. Therefore, the compatibility of other raw materials such as the aqueous silicon dioxide, the aqueous epoxy resin and the like in water is good, a paint film with compact structure can be formed after solidification, the penetration of corrosive medium can be reduced, and the corrosion resistance of the paint film can be improved.
Preferably, the aqueous epoxy resin is further subjected to a modification treatment, wherein the modification treatment comprises the following steps: and stirring and mixing the aqueous epoxy resin, the fatty alcohol polyoxyethylene ether carboxylic acid and the catalyst to obtain the modified aqueous epoxy resin.
By adopting the technical scheme, the fatty alcohol-polyoxyethylene ether carboxylic acid is a surfactant, and under the condition of a catalyst, the fatty alcohol-polyoxyethylene ether carboxylic acid is introduced into the molecular structure of the aqueous epoxy resin, so that the aqueous epoxy resin can be emulsified, the obtained modified aqueous epoxy resin has good water solubility, and the compatibility of other raw materials such as the modified aqueous epoxy resin, the modified silicon dioxide and the like in water is improved, so that the compactness of the obtained paint film is higher, and the corrosion resistance is better.
Preferably, the aqueous epoxy resin is further subjected to a modification treatment, wherein the modification treatment comprises the following steps: mixing the aqueous epoxy resin, the fatty alcohol polyoxyethylene ether carboxylic acid and the catalyst, and stirring and mixing for 5-6 hours at 110-140 ℃ to obtain the modified aqueous epoxy resin.
By adopting the technical scheme, the reaction temperature and time of the fatty alcohol-polyoxyethylene ether carboxylic acid and the aqueous epoxy resin are optimized, the aqueous epoxy resin has a good emulsifying effect, the compatibility of the modified aqueous epoxy resin and other raw materials in water is improved, and the compactness of a paint film is further improved.
Preferably, the filler is one or more of talcum powder, barium sulfate, silica lime and mica powder.
Through adopting above-mentioned technical scheme, mix the raw materials such as above-mentioned filler and waterborne epoxy, modified silica, filler and modified silica disperse in waterborne epoxy, waterborne epoxy can closely bond filler and modified silica together for the film structure that the solidification formed is compact, is favorable to improving the corrosion resistance of film.
Preferably, the pigment is composed of iron oxide and zinc phosphate in a weight ratio of 1 (0.3-0.5).
By adopting the technical scheme, after the ferric oxide and the zinc phosphate are compounded according to the weight proportion, the ferric oxide and the zinc phosphate are added into the total raw materials of the paint, after the paint is solidified, the ferric oxide dispersed in the paint film can be combined with phosphate radical in the zinc phosphate through ferric iron particles, and a protective film taking the ferric phosphate as a main body is formed in the paint film, so that the corrosion resistance of the paint film is improved.
In a second aspect, the present application provides a method for preparing an aqueous two-component corrosion-resistant paint, which adopts the following technical scheme:
the preparation method of the water-based bi-component corrosion-resistant paint comprises the following preparation steps:
s1: stirring and mixing water and a defoaming agent, adding water-based epoxy resin and modified silicon dioxide, and stirring and mixing to obtain a component A;
s2: grinding and dispersing pigment and filler, adding a curing agent, and stirring and mixing to obtain a component B;
s3: and (3) stirring and mixing the component A and the component B to obtain the water-based double-component corrosion-resistant paint.
By adopting the technical scheme, the aqueous epoxy resin and the modified silicon dioxide are added into the mixed solution of water and the defoamer, so that the aqueous epoxy resin and the modified silicon dioxide are fully mixed in the mixed solution, and the flexibility and corrosion resistance of the cured paint film are improved. Meanwhile, the preparation method of the paint is simple and is suitable for large-scale production.
In summary, the present application has the following beneficial effects:
1. the hydroxyl polysiloxane and isocyanate are adopted to modify the silicon dioxide, the surface of the obtained modified silicon dioxide contains an organic silicon chain segment and a urethane bond, after other raw materials such as the modified silicon dioxide and the aqueous epoxy resin are mixed and cured, the organic silicon chain segment and the urethane bond are introduced into a paint film, and the obtained paint film has compact structure, excellent flexibility and corrosion resistance and is beneficial to prolonging the service life of a charging device;
2. in the application, the reaction degree of the hydroxyl polysiloxane and isocyanate can be controlled by optimizing the viscosity of the hydroxyl polysiloxane, the obtained mixture has smaller viscosity and higher reaction efficiency with the hydroxyl silicon dioxide, and the content of the organosilicon polymer of the urethane bond in the modified silicon dioxide is improved;
3. in the preparation method, the aqueous epoxy resin and the modified silicon dioxide are added into water to promote the mutual dispersion of the aqueous epoxy resin and the modified silicon dioxide, then the ground pigment and the filler are added, the mixture is fully mixed, and the mixture is cured under the curing of the curing agent to form a paint film with compact structure, so that the paint film has good corrosion resistance.
Detailed Description
The present application is described in further detail below with reference to examples.
The raw materials used in the examples and comparative examples herein are commercially available except for the following specific descriptions.
Preparation example
Preparation example 1
Modified silica, each raw material and its weight (kg) are shown in the following table:
the preparation method of the modified silicon dioxide comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
In the preparation example, the mesh number of the silicon dioxide is 3000, the whiteness is 59, the content is 97%, the pH value is 6-7, and the ignition decrement is less than or equal to 6%.
A2: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate for 3 hours at 110 ℃, adding the hydroxylated silicon dioxide, and stirring and mixing for 3 hours to obtain the modified silicon dioxide.
In the preparation example of the present application, the hydroxy polysiloxane had a viscosity of 750 mpa.s and a density of 0.98g/cm 3 Purchased from Jiangsu family, new materials, inc.
The isocyanate is 4,4' -diisocyanate diphenylmethane.
PREPARATION EXAMPLES 2 to 5
Modified silica differs from preparation example 1 in that the respective raw materials and their weights (kg) are shown in the following table:
preparation examples 6 to 9
A modified silica differs from preparation example 1 in that the viscosity of the hydroxy polysiloxane is shown in the following table.
Preparation example 10
The modified silica is different from the preparation example 1 in that the preparation method of the modified silica comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate for 4 hours at 100 ℃, adding the hydroxylated silicon dioxide, and stirring and mixing for 4 hours to obtain the modified silicon dioxide.
PREPARATION EXAMPLE 11
The modified silica is different from the preparation example 1 in that the preparation method of the modified silica comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate for 2 hours at 120 ℃, adding the hydroxylated silicon dioxide, and stirring and mixing for 2 hours to obtain the modified silicon dioxide.
Comparative preparation example 1
The modified silica is different from the preparation example 1 in that the preparation method of the modified silica comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: the hydroxyl polysiloxane, isocyanate and hydroxylated silica are stirred and mixed for 6 hours at 110 ℃ to obtain modified silica.
Comparative preparation example 2
The modified silica is different from the preparation example 1 in that the preparation method of the modified silica comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: and (3) stirring and mixing the hydroxylated silicon dioxide and isocyanate for 3 hours at 110 ℃, adding the hydroxyl polysiloxane, and stirring and mixing for 3 hours to obtain the modified silicon dioxide.
Comparative preparation example 3
Modified silica, which is different from preparation example 1 in that the modified silica is a hydroxylated silica, is prepared by: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
Performance detection
The aqueous two-component corrosion-resistant paint obtained in examples 1 to 17 of the present application and the aqueous two-component paint obtained in comparative examples 1 to 3 were subjected to the following tests for adhesion, flexibility, acid resistance, alkali resistance and neutral salt spray resistance:
and (3) adhesive force detection: refer to GB/T1720.
Flexibility detection: refer to GB/T173.
Acid resistance and alkali resistance detection: refer to GB/T9274.
Neutral salt spray resistance detection: reference is made to GB/T1771.
Examples
Example 1
An aqueous two-component corrosion-resistant paint, the components and their corresponding weights (kg) are shown in the following table:
the preparation method of the aqueous bi-component corrosion-resistant paint comprises the following preparation steps:
s1: stirring and mixing water, a defoaming agent and a dispersing agent, adding water-based epoxy resin and modified silicon dioxide, and stirring and mixing to obtain a component A;
in the examples herein, modified silica was prepared from preparation example 1;
the aqueous epoxy resin is bisphenol A aqueous epoxy resin with the brand of CYDW100 and is purchased from Guangzhou Taili chemical industry Co.
S2: grinding and dispersing pigment and filler, adding a curing agent, and stirring and mixing to obtain a component B;
in the embodiment of the application, the pigment is formed by mixing ferric oxide and zinc phosphate according to the weight ratio of 1:0.4;
the filler is formed by mixing talcum powder, barium sulfate, siliceous lime and mica powder according to the weight ratio of 1:1;
the curing agent is a sunny reputation QTYU and is purchased from sunny chemical technology limited company in the Jinan province.
S3: and (3) stirring and mixing the component A and the component B to obtain the water-based double-component corrosion-resistant paint.
Examples 2 to 3
An aqueous two-component corrosion-resistant paint differs from example 1 in that the components and their respective weights (kg) are shown in the following table:
the aqueous two-component corrosion-resistant paint obtained in examples 1 to 3 of the application is subjected to adhesion, flexibility, acid resistance, alkali resistance and salt spray resistance detection, and the detection results are shown in the following table:
as can be seen from the data analysis of the above table, the aqueous two-component corrosion-resistant paint obtained in examples 1-3 of the application has an adhesive force as high as 0 level, flexibility as low as 1mm, 10% sulfuric acid solution resistance as long as 560-720h, 10% sodium hydroxide solution resistance as long as 550-720h, and salt fog resistance as long as 2300-3000h. From this, it is shown that the aqueous two-component corrosion-resistant paint obtained in examples 1 to 3 of the present application has good adhesion, flexibility, acid resistance, alkali resistance and salt spray resistance.
Examples 4 to 7
An aqueous two-component corrosion-resistant paint differs from example 1 in that the modified silica is different.
The preparation raw materials (kg) of the modified silica and the preparation examples adopted by the raw materials are shown in the following table:
the aqueous two-component corrosion-resistant paint obtained in examples 4 to 7 of the application is subjected to acid resistance, alkali resistance and salt spray resistance detection, and the detection results are shown in the following table:
as can be seen from the data analysis of the above tables, the aqueous two-component corrosion-resistant paint obtained in examples 1, 4 and 5 has 10% sulfuric acid solution resistance as long as 620-720h, 10% sodium hydroxide solution resistance as long as 610-720h and salt fog resistance as long as 2500-3000h.
According to the detection results of the embodiment 1 and the embodiment 6 and the embodiment 7, compared with the aqueous two-component corrosion-resistant paint obtained in the embodiment 1, the duration of 10% sulfuric acid solution resistance is reduced by 16.67% -18.06%, the duration of 10% sodium hydroxide solution resistance is reduced by 18.06% -19.44%, and the duration of salt fog resistance is reduced by 17.00% -18.33%.
Therefore, the modified silicon dioxide prepared by mixing the hydroxylated silicon dioxide, the hydroxyl polysiloxane and the isocyanate according to the weight ratio of 1 (0.3-0.5) to 0.2-0.4 is adopted in the total raw materials for preparing the water-based bi-component corrosion-resistant paint, so that the acid resistance, the alkali resistance and the salt fog resistance of the paint film can be improved.
Examples 8 to 11
An aqueous two-component corrosion-resistant paint differs from example 1 in that the modified silica is different.
Viscosity (mpa·s) of the hydroxy polysiloxane in the raw material for preparing the modified silica and the preparation examples used for the modified silica are shown in the following table:
the aqueous two-component corrosion-resistant paint obtained in examples 8 to 11 of the application is subjected to acid resistance, alkali resistance and salt spray resistance detection, and the detection results are shown in the following table:
as can be seen from the data analysis of the above tables, the aqueous two-component corrosion-resistant paint obtained in examples 1, 8 and 9 has 10% sulfuric acid solution resistance up to 650-720h, 10% sodium hydroxide solution resistance up to 640-720h and salt fog resistance up to 2650-3000h.
According to the detection results of the embodiment 1 and the embodiment 10 and the embodiment 11, it is known that the aqueous two-component corrosion-resistant paint obtained in the embodiment 10 and the embodiment 11 is reduced by 11.11% -12.50% in duration of 10% sulfuric acid solution resistance, is reduced by 12.50% -13.89% in duration of 10% sodium hydroxide solution resistance, and is reduced by 12.33% -13.00% in duration of salt spray resistance, compared with the aqueous two-component corrosion-resistant paint obtained in the embodiment 1.
Therefore, the modified silicon dioxide prepared by using the hydroxy polysiloxane with the viscosity of 70-1500mpa.s in the total raw materials for preparing the water-based bi-component corrosion-resistant paint can improve the acid resistance, alkali resistance and salt spray resistance of a paint film.
Example 12
An aqueous two-component corrosion-resistant paint differs from example 1 in that modified silica was prepared from preparation 10.
In preparation example 10, the preparation method of the modified silicon dioxide comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate for 4 hours at 100 ℃, adding the hydroxylated silicon dioxide, and stirring and mixing for 4 hours to obtain the modified silicon dioxide.
Example 13
An aqueous two-component corrosion-resistant paint differs from example 1 in that modified silica was prepared from preparation 11.
In preparation example 11, the preparation method of the modified silica comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate for 2 hours at 120 ℃, adding the hydroxylated silicon dioxide, and stirring and mixing for 2 hours to obtain the modified silicon dioxide.
The aqueous two-component corrosion-resistant paint obtained in examples 12 to 13 of the application is subjected to acid resistance, alkali resistance and salt spray resistance detection, and the detection results are shown in the following table:
as can be seen from the data analysis of the above tables, the aqueous two-component corrosion-resistant paint obtained in examples 1, 12 and 13 has 10% sulfuric acid solution resistance of 665-720 hours, 10% sodium hydroxide solution resistance of 660-720 hours and salt fog resistance of 2800-3000 hours. From this, it is shown that, in the total raw materials for preparing the aqueous bi-component corrosion-resistant paint, the preparation method of the modified silicon dioxide is as follows: after the hydroxyl polysiloxane and isocyanate are stirred and mixed for 2-4 hours at the temperature of 100-120 ℃, the hydroxylated silicon dioxide is added, and the mixture is stirred and mixed for 2-4 hours, so that the obtained modified silicon dioxide can improve the acid resistance, alkali resistance and salt fog resistance of a paint film.
Example 14
The aqueous two-component corrosion-resistant paint is different from the embodiment 1 in that the aqueous epoxy resin is further modified, and the modification treatment comprises the following steps: mixing the aqueous epoxy resin, the fatty alcohol polyoxyethylene ether carboxylic acid and the triethylamine, and stirring and mixing for 6 hours at 110 ℃ to obtain the modified aqueous epoxy resin.
In the embodiment of the application, the aqueous epoxy resin, the fatty alcohol-polyoxyethylene ether carboxylic acid and the triethylamine are mixed according to the weight ratio of 1:0.8:0.1.
Example 15
The aqueous two-component corrosion-resistant paint is different from the embodiment 1 in that the aqueous epoxy resin is further modified, and the modification treatment comprises the following steps: mixing the aqueous epoxy resin, the fatty alcohol polyoxyethylene ether carboxylic acid and the triethylamine, and stirring and mixing for 5 hours at 140 ℃ to obtain the modified aqueous epoxy resin.
The aqueous two-component corrosion-resistant paint obtained in examples 14 to 15 of the present application was subjected to acid resistance, alkali resistance and salt spray resistance tests, and the test results are shown in the following table:
as can be seen from the data analysis of the above tables, the aqueous two-component corrosion-resistant paint obtained in examples 1, 14 and 15 has a 10% sulfuric acid solution resistance of 720-745h, a 10% sodium hydroxide solution resistance of 660-720h and a salt spray resistance of 2800-3000h. Therefore, in the total raw materials for preparing the aqueous bi-component corrosion-resistant paint, the aqueous epoxy resin is emulsified by adopting the fatty alcohol-polyoxyethylene ether carboxylic acid, so that the water solubility of the aqueous epoxy resin can be improved, and the obtained paint film has good acid resistance, alkali resistance and corrosion resistance.
Example 16
An aqueous two-component corrosion-resistant paint differs from example 1 in that the pigment consists of iron oxide and zinc phosphate mixed in a weight ratio of 1:0.3.
Example 17
An aqueous two-component corrosion-resistant paint differs from example 1 in that the pigment consists of iron oxide and zinc phosphate mixed in a weight ratio of 1:0.5.
The aqueous two-component corrosion-resistant paint obtained in examples 16 and 17 of the present application was subjected to acid resistance, alkali resistance and salt spray resistance tests, and the test results are shown in the following table:
as can be seen from the data analysis of the above tables, the aqueous two-component corrosion-resistant paint obtained in examples 1, 16 and 17 has 10% sulfuric acid solution resistance as long as 690-720h, 10% sodium hydroxide solution resistance as long as 705-720h and salt spray resistance as long as 2900-3000h. Therefore, in the total raw materials for preparing the water-based bi-component corrosion-resistant paint, the pigment is formed by mixing iron oxide and zinc phosphate, the weight ratio of the iron oxide to the zinc phosphate is 1 (0.3-0.5), and the obtained paint film has good acid resistance, alkali resistance and corrosion resistance.
Comparative example
Comparative example 1
An aqueous two-component paint differs from example 1 in that the modified silica is prepared by a different method, i.e. the modified silica is prepared from comparative preparation 1.
In comparative preparation example 1, the preparation method of the modified silica comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: the hydroxyl polysiloxane, isocyanate and hydroxylated silica are stirred and mixed for 6 hours at 110 ℃ to obtain modified silica.
Comparative example 2
An aqueous two-component paint differs from example 1 in that the modified silica is prepared by a different method, i.e. the modified silica is prepared from comparative preparation 2.
In comparative preparation example 2, the preparation method of the modified silica comprises the following preparation steps:
a1: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
A2: and (3) stirring and mixing the hydroxylated silicon dioxide and isocyanate for 3 hours at 110 ℃, adding the hydroxyl polysiloxane, and stirring and mixing for 3 hours to obtain the modified silicon dioxide.
Comparative example 3
An aqueous two-component paint is distinguished from example 1 in that the modified silica is a hydroxylated silica, prepared from preparation example 3.
In preparation example 3, the preparation method of the hydroxylated silicon dioxide comprises the following steps: stirring and mixing silicon dioxide and water to obtain a silicon dioxide aqueous solution; adjusting the pH value of the aqueous solution of the silicon dioxide to 9 at 80 ℃, stirring and mixing for 1h, cooling to 20-25 ℃, filtering, washing the solid to neutrality by water, and drying the solid at 60 ℃ for 10h to obtain the hydroxylated silicon dioxide.
The aqueous two-component paints obtained in comparative examples 1 to 3 were tested for adhesion, flexibility, acid resistance, alkali resistance and salt spray resistance, and the test results are shown in the following table:
according to the detection results of the example 1 and the comparative examples 1 and 2, the aqueous two-component paint obtained in the comparative examples 1 and 2 has the adhesive force reduced to 1 level, the flexibility reduced to 2mm, the duration of 10% sulfuric acid solution resistance reduced by 27.78% -30.56%, the duration of 10% sodium hydroxide solution resistance reduced by 29.17% -31.94% and the duration of salt spray resistance reduced by 30.00% -33.33% compared with the aqueous two-component corrosion resistant paint obtained in the example 1. From this, it is shown that, in the total raw materials for preparing the aqueous bi-component corrosion-resistant paint, the preparation method of the modified silicon dioxide is as follows: after the hydroxyl polysiloxane and the isocyanate are stirred and mixed, the hydroxyl silicon dioxide is added, and the modified silicon dioxide is obtained after stirring and mixing, so that the adhesive force, flexibility, acid resistance, alkali resistance and salt fog resistance of a paint film can be improved.
From the results of the test in example 1 and comparative example 3, it is understood that the aqueous two-component paint obtained in comparative example 3 has reduced adhesion to level 1, flexibility to 3mm, a period of time to 10% sulfuric acid solution resistance of 33.33%, a period of time to 10% sodium hydroxide solution resistance of 33.33%, and a period of time to salt fog resistance of 40% relative to the aqueous two-component corrosion-resistant paint obtained in example 1. Therefore, in the total raw materials for preparing the water-based bi-component corrosion-resistant paint, the self-made modified silicon dioxide can improve the adhesive force, flexibility, acid resistance, alkali resistance and salt spray resistance of a paint film.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (9)
1. The aqueous double-component corrosion-resistant paint is characterized by comprising a component A and a component B;
the component A comprises the following components in parts by weight:
50-60 parts of aqueous epoxy resin;
10-15 parts of modified silicon dioxide;
10-40 parts of water;
1-2 parts of a defoaming agent;
the component B comprises the following components in parts by weight:
25-40 parts of curing agent;
20-30 parts of filler;
10-20 parts of pigment;
the preparation method of the modified silicon dioxide comprises the following steps: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate, then adding the hydroxylated silicon dioxide, and stirring and mixing to obtain the modified silicon dioxide.
2. The aqueous two-component corrosion-resistant paint according to claim 1, wherein the hydroxy polysiloxane has a viscosity of 70-1500mpa.s.
3. The aqueous two-component corrosion-resistant paint of claim 1, wherein the modified silica is prepared by the following steps: and (3) stirring and mixing the hydroxyl polysiloxane and isocyanate for 2-4 hours at 100-120 ℃, then adding the hydroxylated silicon dioxide, and stirring and mixing for 2-4 hours to obtain the modified silicon dioxide.
4. The aqueous two-component corrosion-resistant paint according to claim 1, wherein the modified silica is prepared by mixing 1 (0.3-0.5) of hydroxylated silica, 0.2-0.4 of hydroxyl polysiloxane and isocyanate.
5. The aqueous two-component corrosion-resistant paint of claim 1, wherein the aqueous epoxy resin is further modified by the steps of: and stirring and mixing the aqueous epoxy resin, the fatty alcohol polyoxyethylene ether carboxylic acid and the catalyst to obtain the modified aqueous epoxy resin.
6. The aqueous two-component corrosion resistant paint of claim 5, wherein the aqueous epoxy resin is further modified by the steps of: mixing the aqueous epoxy resin, the fatty alcohol polyoxyethylene ether carboxylic acid and the catalyst, and stirring and mixing for 5-6 hours at 110-140 ℃ to obtain the modified aqueous epoxy resin.
7. The aqueous two-component corrosion-resistant paint of claim 1, wherein the filler is one or more of talc, barium sulfate, silica lime and mica powder.
8. The aqueous two-component corrosion-resistant paint according to claim 1, wherein the pigment is composed of a mixture of iron oxide and zinc phosphate in a weight ratio of 1 (0.3-0.5).
9. The method for preparing the aqueous two-component corrosion-resistant paint according to any one of claims 1 to 8, which is characterized by comprising the following preparation steps:
s1: stirring and mixing water and a defoaming agent, adding water-based epoxy resin and modified silicon dioxide, and stirring and mixing to obtain a component A;
s2: grinding and dispersing pigment and filler, adding a curing agent, and stirring and mixing to obtain a component B;
s3: and (3) stirring and mixing the component A and the component B to obtain the water-based double-component corrosion-resistant paint.
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| CN116891671A (en) * | 2023-09-11 | 2023-10-17 | 成都石大力盾科技有限公司 | Anti-scale anticorrosive paint and preparation method thereof |
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