CN115558372A - Water-based epoxy micaceous iron intermediate paint for outer wall of storage tank and preparation method thereof - Google Patents
Water-based epoxy micaceous iron intermediate paint for outer wall of storage tank and preparation method thereof Download PDFInfo
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- CN115558372A CN115558372A CN202211209473.3A CN202211209473A CN115558372A CN 115558372 A CN115558372 A CN 115558372A CN 202211209473 A CN202211209473 A CN 202211209473A CN 115558372 A CN115558372 A CN 115558372A
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- 239000004593 Epoxy Substances 0.000 title claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000003973 paint Substances 0.000 title claims abstract description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000003860 storage Methods 0.000 title claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000010445 mica Substances 0.000 claims abstract description 39
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- 239000000839 emulsion Substances 0.000 claims abstract description 32
- 239000000049 pigment Substances 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000000945 filler Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 16
- 239000000440 bentonite Substances 0.000 claims abstract description 13
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 13
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920000768 polyamine Polymers 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 230000001804 emulsifying effect Effects 0.000 claims abstract description 4
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 claims abstract description 4
- 239000002270 dispersing agent Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- 238000009736 wetting Methods 0.000 claims description 13
- 239000002518 antifoaming agent Substances 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000005342 ion exchange Methods 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000011863 silicon-based powder Substances 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 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 3
- 239000010433 feldspar Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 22
- 239000000126 substance Substances 0.000 abstract description 18
- 150000003839 salts Chemical class 0.000 abstract description 14
- 239000002253 acid Substances 0.000 abstract description 7
- 239000003513 alkali Substances 0.000 abstract description 6
- 239000007921 spray Substances 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 15
- 239000002956 ash Substances 0.000 description 14
- 239000000047 product Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 5
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- -1 hydrogen ions Chemical class 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000013065 commercial product Substances 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 2
- 229910052739 hydrogen Chemical group 0.000 description 2
- 239000001257 hydrogen Chemical group 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910021426 porous silicon Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical group [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 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
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
-
- 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
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
Landscapes
- 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)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the field of petrochemical engineering coatings, and in particular relates to a water-based epoxy micaceous iron intermediate paint for the outer wall of a storage tank and a preparation method thereof. The water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank comprises a component A and a component B in a mass ratio of 5-8: 1, wherein the component A comprises aqueous epoxy emulsion, water, aqueous organic bentonite, antirust pigment, pigment and filler, mica powder, mica iron oxide ash and an auxiliary agent; the component B is a waterborne epoxy curing agent; the water-based epoxy emulsion is prepared by emulsifying liquid epoxy resin, the epoxy equivalent is 540-650, and the solid content is 55 +/-5%; the waterborne epoxy curing agent is polyamine addition product, the amine hydroxyl equivalent is 400-450, and the solid content is 50 +/-2%. The basic film forming substance obtained by mixing the water-based epoxy emulsion and the polyamine water-based epoxy curing agent has strong adhesive force and excellent flexibility, impact resistance, hardness, chemical resistance and salt spray resistance, particularly chemical properties such as acid resistance, alkali resistance and salt resistance.
Description
Technical Field
The invention relates to the field of petrochemical engineering coatings, and in particular relates to a water-based epoxy micaceous iron oxide intermediate paint for the outer wall of a storage tank and a preparation method thereof.
Background
In the petrochemical industry, metal equipment is mostly in acid, alkali, salt and high-temperature corrosion environments and is exposed in chemical industry atmosphere, so that the metal corrosion in the petrochemical industry is more serious than that in other industrial departments. With the rapid development of the petrochemical industry, the anticorrosive coating is widely applied, most of the existing anticorrosive coating systems are flammable and explosive solvent-based coatings, petroleum and petrochemical products in the industry are flammable and explosive, double potential safety hazards are caused in the anticorrosive construction process of the petrochemical industry, and the safety attention degree is very high. If the coating is made from the source, the flammable and explosive solvent-based coating is replaced by the water-based coating without safety risk, and the potential safety hazard is greatly reduced in the construction process, particularly in the maintenance construction.
The water-based epoxy micaceous iron oxide intermediate paint is mainly used between a primer and a finish paint, and has the effects of increasing the thickness of a coating, improving the permeability resistance, slowing down the corrosion and prolonging the service life of the whole coating. For example, a thick paste type VOCs waterborne epoxy micaceous iron oxide coating and a preparation method thereof are disclosed in a patent document with publication number CN110218503B (2021, 13/04) and the coating is prepared from substances of a component A and a component B, wherein the raw materials of the component A comprise the following components: the paint comprises a first aqueous epoxy emulsion, a second aqueous epoxy emulsion, mica iron oxide ash, pigment and filler, an antirust pigment, a thickening agent, a wetting dispersant, an anti-settling agent, a defoaming agent, a base material wetting agent and an anti-flash rust agent; the component B is a water-based amine curing agent; the solid content of the first aqueous epoxy emulsion is more than 50 percent, the epoxy equivalent is 450 to 550, the viscosity is less than 1000mPa & s, the solid content of the second aqueous epoxy emulsion is more than 55 percent, the epoxy equivalent is 250 to 350, and the viscosity is less than 500mPa & s. According to the scheme, the water-based epoxy emulsion with low viscosity and low epoxy equivalent weight is selected for compounding, all raw materials can be dispersed without adding water, and the environment-friendly water-based epoxy micaceous iron oxide coating with excellent comprehensive properties such as thick coating, quick drying and corrosion resistance is obtained without adding a film forming aid and a drier.
However, the chemical performances of acid, alkali, salt and the like of the waterborne epoxy micaceous iron oxide intermediate paint are not mentioned in the scheme, and the application of the outer wall of the storage tank in the petrochemical field cannot be met.
Disclosure of Invention
In order to solve the problem that the water-based epoxy micaceous iron intermediate paint in the prior art cannot be applied to the outer wall of a storage tank in the field of petrochemical industry, the invention provides the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank, which comprises a component A and a component B in a mass ratio of 5-8: 1, wherein the component A comprises aqueous epoxy emulsion, water, aqueous organic bentonite, antirust pigment, pigment and filler, mica powder, mica iron oxide ash and an auxiliary agent;
the component B is a waterborne epoxy curing agent;
the waterborne epoxy emulsion is prepared by emulsifying liquid epoxy resin, the epoxy equivalent is 540-650, and the solid content is 55 +/-5%; the waterborne epoxy curing agent is polyamine addition product, the amine hydroxyl equivalent is 400-450, and the solid content is 50 +/-2%.
In one embodiment, the component A comprises 30-40 parts of aqueous epoxy emulsion, 5-10 parts of deionized water, 1-2 parts of aqueous organic bentonite, 5-10 parts of antirust pigment, 15-20 parts of pigment and filler, 10-15 parts of mica powder, 10-15 parts of mica iron oxide ash and 0.7-1.8 parts of auxiliary agent by weight.
Organic compounds can be adsorbed on the organic bentonite sheets adopted by the invention, meanwhile, the edges of the sheet structures contain hydroxyl groups, and hydrogen bonds can be formed among the bentonite sheets dispersed in the coating by virtue of polar small molecules to form a network structure, so that the coating is endowed with certain structural viscosity.
In one embodiment, the mica powder is 400-800, the mica iron oxide ash is 325-500 meshes, and the mass ratio of the mica powder to the mica iron oxide ash is 1:1.
in one embodiment, the antirust pigment is ion exchange type antirust silicon powder with a specific surface area of 200-800 m 2 The pH value is 5-10, and the product can be a model MS775 product produced by Wuxi Hecheng New Material Co.
In one embodiment, the pigment and filler is at least one of titanium dioxide, feldspar powder, talcum powder and precipitated barium sulfate.
In one embodiment, the auxiliary agent comprises a wetting dispersant, a defoaming agent and a leveling agent, and the mass ratio of the wetting dispersant to the defoaming agent to the leveling agent is 0.5-1: 0.1 to 0.3:0.1 to 0.5.
Preferably, the wetting dispersant is TEGO 760W, manufactured by Yingshandi high chemistry, inc.; the antifoaming agent is TEGO 825 produced by Yingshandy high chemistry, LLC; the leveling agent is BYK-381 manufactured by Pico chemical company.
The invention also provides a preparation method of the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank, wherein the preparation method of the component A comprises the steps of firstly adding the water-based epoxy emulsion, water and the auxiliary agent into a dispersion kettle for uniform dispersion; under the stirring state, continuously adding the water-based organic bentonite and uniformly dispersing; continuously adding the anti-rust pigment, the pigment and filler, the mica powder and the mica iron oxide ash under stirring and uniformly dispersing; filtering with a filter screen, and barreling to obtain component A;
mixing the component A and the component B according to the ratio of 5-8: 1, and obtaining the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank.
The specific operation steps are as follows:
adding the water-based epoxy emulsion, deionized water, a wetting dispersant, a defoaming agent and a flatting agent into a dispersion kettle, and dispersing at a low speed of 500r/min for 3-5 minutes; under the condition of slow stirring, adding water-based organic bentonite, and dispersing at a high speed of 900-1200 r/min for 15-20 min; slowly adding the anti-rust pigment, the pigment and filler, the mica powder and the mica iron oxide ash while stirring, and dispersing at a high speed of 900-1200 r/min for 20-30 min; and after all the detection items are qualified, filtering by using a 80-mesh filter screen and then barreling to obtain the component A.
The preparation method of the component B comprises the following steps:
and (3) subpackaging the waterborne epoxy curing agent according to the packaging specification to obtain the component B.
Mixing the component A and the component B according to the ratio of 5-8: 1 to obtain the water-based epoxy cloud iron intermediate paint for the outer wall of the storage tank, adding 5 to 10 percent of deionized water into the water-based epoxy cloud iron intermediate paint for diluting the outer wall of the storage tank during construction, and uniformly stirring the mixture to be used for construction, wherein the construction mode is spraying, rolling or brushing.
Based on the above, compared with the prior art, the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank provided by the invention has the following technical effects and principles:
(1) The water-based epoxy emulsion adopted by the invention is prepared by emulsifying liquid epoxy resin, the epoxy equivalent is 540-650, and the solid content is 55 +/-5%; the waterborne epoxy curing agent is polyamine addition product, the amine hydroxyl equivalent weight is 430, and the solid content is 50 +/-2%. The basic film forming substance obtained by mixing the waterborne epoxy emulsion and the polyamine waterborne epoxy curing agent has strong adhesive force and excellent flexibility, impact, hardness, chemical resistance and salt spray resistance, particularly chemical properties such as acid resistance, alkali resistance and salt resistance.
(2) According to the invention, the 400-mesh mica powder and the 325-mesh mica iron oxide ash are compounded and used, and the inert flaky filler is laminated in the paint film, so that the permeation path of corrosive media such as acid, alkali and salt is increased, and the chemical resistance and the salt spray resistance of the coating are greatly improved.
(3) According to the invention, the ion exchange type antirust silicon powder is used as the antirust pigment, and since the ion exchange type antirust silicon powder contains strong alkali metal ions, after corrosive ions such as hydrogen ions enter a paint film, the corrosive ions are adsorbed by the porous silicon dioxide and exchange with calcium ions to release calcium ions which enter the paint film, and the calcium ions can also react with water molecules to release calcium ions and hydroxyl ions. The process can keep the pH process of the paint film in a neutral and alkaline environment all the time, and delays the corrosion of metal. Calcium ions released by ion exchange enter the paint film and can react with free silicate ions to form an insoluble protective film covering the metal surface. Active silicate ions released by the silicon dioxide react with iron ions and ferrous ions of the anode to generate an insoluble silicate protective layer at the anode, so that the metal corrosion is further delayed.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The object and other advantages of the present invention can be realized and attained by the means described in the specification and claims.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; the technical features devised in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the present invention, it should be noted that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and should not be construed as limiting the present invention; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The invention provides example 1 as shown in the following table:
example 1
Preparation of the component A:
adding 30 parts by weight of water-based epoxy emulsion, 10 parts by weight of deionized water, 1 part by weight of wetting dispersant, 0.3 part by weight of defoaming agent and 0.5 part by weight of flatting agent into a dispersion kettle, and dispersing at a low speed (500 r/min) for 3-5 minutes; under the condition of slow stirring, 1 part by weight of aqueous organic bentonite is added, and the mixture is dispersed at a high speed of 900-1200 r/min for 15-20 min; slowly adding 10 weight parts of antirust pigment, 17.2 weight parts of pigment and filler, 15 weight parts of 400-mesh mica powder and 15 weight parts of 325-mesh mica iron oxide ash under stirring, and dispersing at a high speed of 900-1200 r/min for 20-30 min; filtering with 80 mesh filter screen, and packaging into barrel to obtain component A.
The component B is a waterborne epoxy curing agent, in particular to a commercial product AL-HGW01 of Tianjin Angoring, which is a polyamine addition product with an amine hydroxyl equivalent of 430 and a solid content of 50 +/-2%.
Mixing the component A and the component B according to the ratio of 8:1, and obtaining the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank.
In the embodiment, the waterborne epoxy emulsion is an AL-HYW02 epoxy emulsion which is a commercial product of Tianjin Angori, the epoxy equivalent is 540-650, and the solid content is 55 +/-5%.
The pigment and filler is a mixture of titanium dioxide, feldspar powder and talcum powder in any proportion; the wetting dispersant is TEGO 760W produced by Yingshandy high chemistry, inc.; the antifoaming agent is TEGO 825 produced by Yingshangdi high chemistry Limited liability company; the leveling agent is BYK-381 manufactured by Pico chemical company.
Example 2
Preparation of component A:
adding 40 parts by weight of aqueous epoxy emulsion, 5 parts by weight of deionized water, 0.5 part by weight of wetting dispersant, 0.1 part by weight of defoamer and 0.2 part by weight of flatting agent into a dispersion kettle, and dispersing at a low speed (500 r/min) for 3-5 minutes; under slow stirring, 2 weight parts of water organic bentonite is added, and the mixture is dispersed at a high speed of 900-1200 r/min for 15-20 min; slowly adding 5 parts by weight of antirust pigment, 11.2 parts by weight of pigment and filler, 18 parts by weight of 400-mesh mica powder and 18 parts by weight of 325-mesh mica iron oxide ash under stirring, and dispersing at a high speed of 900-1200 r/min for 20-30 min; filtering with 80 mesh filter screen, and packaging into barrel to obtain component A.
The component B is a waterborne epoxy curing agent, in particular to a commercial product AL-HGW01 of Tianjin Angoring, which is a polyamine addition product with an amine hydroxyl equivalent of 430 and a solid content of 50 +/-2%.
Mixing the component A and the component B according to the ratio of 5:1, and obtaining the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank.
In the embodiment, the water-based epoxy emulsion is a commercially available product AL-HYW02 epoxy emulsion of Tianjin Angori, the epoxy equivalent is 540-650, and the solid content is 55 +/-5%.
The pigment and filler is titanium dioxide; the wetting dispersant is TEGO 760W produced by Yingshandy high chemistry, inc.; the antifoaming agent is TEGO 825 produced by Yingshangdi high chemistry Limited liability company; the leveling agent was BYK-381 manufactured by Pico chemical Co.
Example 3
Preparation of component A:
adding 33 parts by weight of water-based epoxy emulsion, 7 parts by weight of deionized water, 0.6 part by weight of wetting dispersant, 0.2 part by weight of defoaming agent and 0.4 part by weight of flatting agent into a dispersion kettle, and dispersing at a low speed (500 r/min) for 3-5 minutes; under the condition of slow stirring, 1.5 weight portions of water-based organic bentonite are added, and the mixture is dispersed at a high speed of 900-1200 r/min for 15-20 min; slowly adding 8 parts by weight of antirust pigment, 17.3 parts by weight of pigment and filler, 16 parts by weight of 400-mesh mica powder and 16 parts by weight of 325-mesh mica iron oxide ash under stirring, and dispersing at a high speed of 900-1200 r/min for 20-30 min; filtering with 80 mesh sieve, and packaging in barrel to obtain component A.
The component B is a waterborne epoxy curing agent, in particular to a commercial product AL-HGW01 of Tianjin Angori, which is a polyamine addition product with an amine hydroxyl equivalent of 430 and a solid content of 50 +/-2 percent.
Mixing the component A and the component B according to the ratio of 6:1, and obtaining the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank.
In the embodiment, the water-based epoxy emulsion is a commercially available product AL-HYW02 epoxy emulsion of Tianjin Angori, the epoxy equivalent is 540-650, and the solid content is 55 +/-5%.
The pigment and the filler adopt a mixture of titanium dioxide and precipitated barium sulfate in any proportion; the wetting dispersant is TEGO 760W produced by Yingshandy high chemistry Limited liability company; the antifoaming agent is TEGO 825 produced by Yingshangdi high chemistry Limited liability company; the leveling agent is BYK-381 manufactured by Pico chemical company.
It should be noted that the specific parameters or some common reagents in the above embodiments are specific examples or preferred embodiments under the concept of the present invention, and are not limited thereto; those skilled in the art can adapt the same within the spirit and scope of the present invention.
In addition, the raw materials used may be those commercially available or prepared by methods conventional in the art, unless otherwise specified.
When the water-based epoxy micaceous iron oxide intermediate paint for the outer wall of the storage tank is used for construction, only 5-10% of deionized water is added for dilution, and the paint can be used for construction after being uniformly stirred, and the construction mode adopts spraying, rolling or brushing.
In order to better illustrate the technical effects of the invention, the invention also provides the following comparative examples:
comparative example 1
The epoxy equivalent of the aqueous epoxy emulsion in example 1 was changed to 250 to 290, and the rest was the same as in example 1.
Comparative example 2
The epoxy equivalent of the aqueous epoxy emulsion in example 1 was changed to 750 to 910, and the rest was the same as in example 1.
Comparative example 3
The amine hydroxyl equivalent weight of the waterborne epoxy curing agent of example 2 was changed to 150, the remainder being identical to example 2.
Comparative example 4
The amine hydroxyl equivalent weight of the waterborne epoxy curing agent of example 2 was changed to 335, the remainder being identical to example 2.
Comparative example 5
The mass of the ion-exchange type rust-preventive silicon powder and the like in example 3 was replaced with zinc phosphate, and the balance was the same as in example 3.
Comparative example 6
The ion-exchange type rust-preventive silicon powder and the like in example 3 were replaced by Halox SW-111 in quality, and the remainder was the same as in example 3.
Comparative example 7
The quality of mica powder and the like in example 3 was replaced with mica iron oxide ash, and the rest was the same as example 3.
Comparative example 8
The mass of mica iron oxide ash and the like in example 3 was replaced with mica powder, and the balance was the same as in example 3.
Comparative example 9
Some commercial manufacturer's water-based epoxy micaceous iron oxide intermediate paint.
The coatings prepared in the above examples and comparative examples were tested for their performance, where the test criteria are shown in table 1:
TABLE 1
The test results of the examples are shown in table 2:
TABLE 2
The results of the test of comparative example 1 to comparative example 4 are shown in table 3:
TABLE 3
The results of the tests of comparative example 5 to comparative example 9 are shown in table 4:
TABLE 4
The test results show that the epoxy emulsion and the curing agent determine the basic performance of the coating, and the water-based epoxy emulsion and the polyamine water-based epoxy curing agent adopted by the invention have strong adhesive force and excellent flexibility, impact, hardness, chemical resistance and salt spray resistance, particularly chemical properties such as acid resistance, alkali resistance and salt resistance. The ion exchange type antirust silicon powder is selected to effectively improve the chemical resistance and salt spray resistance of a paint film; and finally, the mica powder and the mica iron oxide ash are compounded for use, so that the permeation path of acid-base salt and other corrosion media is increased, and the coating finally obtains the optimal chemical resistance and salt mist resistance.
In conclusion, the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank, provided by the invention, has the advantages of low VOC, good flexibility, impact resistance, salt fog resistance, ultrahigh adhesive force and chemical resistance, has good matching performance with the primer and the finish paint, and can effectively improve the corrosion resistance of the matched coating in harsh environments such as strong acid, strong base and the like. Therefore, the water-based epoxy micaceous iron oxide intermediate paint for the outer wall of the storage tank is suitable for coating protection of the outer wall of the storage tank in the field of petrochemical engineering.
In addition, it will be appreciated by those skilled in the art that, although there may be many problems with the prior art, each embodiment or aspect of the present invention may be improved only in one or several respects, without necessarily simultaneously solving all the technical problems listed in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a storage tank outer wall is with aqueous epoxy cloud iron intermediate coat which characterized in that: the component A and the component B are mixed according to the mass ratio of 5-8: 1, wherein the component A comprises aqueous epoxy emulsion, water, aqueous organic bentonite, antirust pigment, pigment and filler, mica powder, mica iron oxide ash and an auxiliary agent;
the component B is a waterborne epoxy curing agent;
the waterborne epoxy emulsion is prepared by emulsifying liquid epoxy resin, the epoxy equivalent is 540-650, and the solid content is 55 +/-5%; the waterborne epoxy curing agent is polyamine addition product, the amine hydroxyl equivalent is 400-450, and the solid content is 50 +/-2%.
2. The waterborne epoxy micaceous iron oxide intermediate paint for the outer wall of the storage tank as claimed in claim 1, is characterized in that: the component A comprises 30-40 parts of aqueous epoxy emulsion, 5-10 parts of deionized water, 1-2 parts of aqueous organic bentonite, 5-10 parts of antirust pigment, 15-20 parts of pigment and filler, 10-15 parts of mica powder, 10-15 parts of mica iron oxide ash and 0.7-1.8 parts of auxiliary agent by weight.
3. The water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank, which is prepared from the following raw materials in parts by weight: the mica powder is 400-800 meshes, the mica iron oxide ash is 325-500 meshes, and the mass ratio of the mica powder to the mica iron oxide ash is 1:1.
4. the waterborne epoxy micaceous iron oxide intermediate paint for the outer wall of the storage tank as claimed in claim 1, is characterized in that: the antirust pigment is ion exchange type antirust silicon powder with a specific surface area of 200-800 m 2 (iv) per gram, pH range is 5-10.
5. The waterborne epoxy micaceous iron oxide intermediate paint for the outer wall of the storage tank as claimed in claim 1, is characterized in that: the pigment and filler is at least one of titanium dioxide, feldspar powder, talcum powder and precipitated barium sulfate.
6. The waterborne epoxy micaceous iron oxide intermediate paint for the outer wall of the storage tank as claimed in claim 1, is characterized in that: the auxiliary agent comprises a wetting dispersant, a defoaming agent and a flatting agent, and the mass ratio of the wetting dispersant to the defoaming agent to the flatting agent is (0.5-1): 0.1 to 0.3:0.1 to 0.5.
7. A preparation method of the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank, which is characterized by comprising the following steps of:
the preparation method of the component A comprises the steps of firstly adding the waterborne epoxy emulsion, water and the auxiliary agent into a dispersion kettle for uniform dispersion; under the stirring state, continuously adding the water-based organic bentonite and uniformly dispersing; continuously adding the anti-rust pigment, the pigment and filler, the mica powder and the mica iron oxide ash under stirring and uniformly dispersing; filtering with a filter screen, and barreling to obtain component A;
mixing the component A and the component B according to the ratio of 5-8: 1, and obtaining the water-based epoxy micaceous iron intermediate paint for the outer wall of the storage tank.
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Application publication date: 20230103 |