CN115353795A - High-resistance water-based epoxy zinc-rich primer and preparation method thereof - Google Patents
High-resistance water-based epoxy zinc-rich primer and preparation method thereof Download PDFInfo
- Publication number
- CN115353795A CN115353795A CN202211076371.9A CN202211076371A CN115353795A CN 115353795 A CN115353795 A CN 115353795A CN 202211076371 A CN202211076371 A CN 202211076371A CN 115353795 A CN115353795 A CN 115353795A
- Authority
- CN
- China
- Prior art keywords
- component
- percent
- rich primer
- resistance
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- C08G59/44—Amides
- C08G59/46—Amides together with other curing agents
-
- 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
- C08G59/56—Amines together with other curing agents
- C08G59/60—Amines together with other curing agents with amides
-
- 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
- C09D5/002—Priming 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- 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
- C09D7/45—Anti-settling agents
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
Abstract
The invention belongs to the technical field of water-based anticorrosive coatings, and particularly discloses a high-resistance water-based epoxy zinc-rich primer and a preparation method thereof. The primer consists of a component A and a component B, wherein the component A comprises: 4.0 to 5.0 percent of modified alicyclic amine aqueous curing agent, 3.2 to 4.0 percent of modified polyamide aqueous curing agent, 3.0 to 7.0 percent of film forming additive, 25.0 to 35.0 percent of 500-mesh spherical zinc powder, 40.0 to 50.0 percent of 800-mesh flaky zinc powder, 3.0 to 7.0 percent of filler, 0.1 to 0.5 percent of dispersant, 0.1 to 0.5 percent of defoamer, 2.4 to 3.6 percent of anti-settling agent and 1.6 to 5.0 percent of other components; wherein the sum of the weight percentages of the A components is one hundred percent; the component B comprises 93.0 to 97.0 percent of epoxy emulsion, 1.0 to 3.0 percent of flash rust inhibitor, 0.3 to 0.7 percent of thickener and 1.5 to 3.5 percent of water; wherein the sum of the weight percentages of the B components is one hundred percent. The water-based epoxy zinc-rich primer product has good initial water resistance, outstanding flash rust resistance and excellent salt spray resistance, and can be widely applied to primer coating of the surface of a metal substrate in the field of industrial corrosion prevention.
Description
Technical Field
The invention belongs to the technical field of water-based anticorrosive coatings, and particularly relates to a high-resistance water-based epoxy zinc-rich primer and a preparation method thereof.
Background
The zinc-rich primer can be divided into three types of inorganic, organic and organic/inorganic blend according to the film-forming material. The inorganic zinc-rich primer can be further divided into water glass, ethyl silicate, phosphate and the like according to film forming substances, wherein the most widely applied at home and abroad is the ethyl orthosilicate. The organic zinc-rich primer is commonly used epoxy, chlorinated rubber, vinyl resin and polyurethane resin as film forming base materials, and the epoxy zinc-rich primer is most commonly used.
The epoxy zinc-rich primer is widely applied to the field of corrosion prevention of steel due to the double corrosion prevention mechanism of 'physical shielding' and 'anode sacrifice', particularly the field of heavy corrosion prevention, but the epoxy zinc-rich primer is still a solvent type epoxy zinc-rich primer which is applied more at present. The solvent-based coating causes great harm to the environment and constructors due to high content of VOCs, and can not meet the requirement of sustainable development. The water-based epoxy zinc-rich primer is widely applied and researched as an environment-friendly coating, but the performance of the water-based epoxy zinc-rich primer is still greatly controversial in the performance industry at present, the performance of the water-based epoxy zinc-rich primer is considered to be inferior to that of a solvent type primer, and even the water-based epoxy zinc-rich primer is considered by many people to be difficult to apply in the field of heavy corrosion resistance, and especially the corrosion environment is difficult to meet the requirements when the corrosion environment is C5 or above. The resistance of water-based paint is an important index for measuring whether the water-based paint can be applied in the field of heavy corrosion protection, and due to the special film forming process and a solvent system, compared with solvent-based paint, some special resistance, especially initial water resistance, flash rust resistance and salt fog resistance, is particularly important.
In the research aspect of improving the corrosion resistance of the water-based paint, many researches are focused on modifying the epoxy zinc-rich primer by using carbon nano materials such as graphene, carbon nano tubes and the like so as to improve the corrosion resistance of the epoxy zinc-rich primer. The carbon nano material with the nano structure and high conductivity is utilized to improve the shielding property of the epoxy zinc-rich primer and enhance the cathodic protection effect to improve the corrosion resistance of the epoxy zinc-rich primer, but the carbon nano material is less concerned about some performances required in the practical application process, such as initial water resistance and flash rust resistance, and the performances are key performances which determine whether the water-based epoxy zinc-rich primer can be successfully applied to the heavy corrosion protection field.
Chinese patent document with application number 201711177381.0 discloses a long-acting water-based epoxy zinc-rich anti-corrosion primer and a coating method thereof. The product has simple construction process and good corrosion resistance and durability, but the patent application does not mention the performance and the technical scheme of the product in the aspects of initial water resistance and flash rust resistance; the Chinese patent document with the application number of 201810214574.7 discloses a water-based epoxy zinc-rich primer and a preparation method thereof, the product has excellent anti-sagging performance and good anti-settling performance, and the storage performance of the coating is improved, but the patent application does not mention the performance and the technical scheme of the product in the aspects of initial water resistance and flash rust resistance, and the salt spray resistance time is only 1000 hours, so that the superiority and the long-acting performance of the product in the aspect of the anti-corrosion performance cannot be shown.
The present invention has been made based on such a situation.
Disclosure of Invention
The invention aims to overcome the defects of initial water resistance, flash rust resistance, salt spray resistance and the like in the prior water-based epoxy zinc-rich primer technology, and provides a high-resistance water-based epoxy zinc-rich primer, which has the advantages of good initial water resistance, outstanding flash rust resistance, excellent salt spray resistance, good storage stability, strong adhesive force, high drying speed, low VOC content, health, environmental protection and convenient construction, and can be widely applied to primer coating of the surface of a metal substrate in the field of industrial corrosion prevention. The invention also aims to provide a preparation method of the high-resistance water-based epoxy zinc-rich primer.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-resistance water-based epoxy zinc-rich primer comprises the following components in percentage by weight:
component A
Wherein the sum of the weight percentages of the components in the component A is one hundred percent;
b component
Wherein the sum of the weight percentages of the components in the component B is one hundred percent.
In the invention, the modified alicyclic amine waterborne curing agent and the modified polyamide waterborne curing agent in the component A are waterborne amine epoxy curing agents. The weight ratio of the modified alicyclic amine aqueous curing agent to the modified polyamide aqueous curing agent is (1.2-1.3) to 1.
The alicyclic curing agent has the advantages of proper pot life, good adhesive property, high gloss, low color, good chemical resistance and high hardness, but poor flexibility, and is not favorable for improving the impact resistance of the coating. The amide curing agent paint has good adhesive force, good flexibility, longer working life, no pungent smell, slightly low reaction speed and poor hardness. The high-resistance waterborne epoxy zinc-rich primer disclosed by the invention is prepared by matching the modified alicyclic amine waterborne curing agent and the modified polyamide waterborne curing agent according to a certain weight ratio, and a paint film has the advantages of better chemical resistance, higher hardness and impact resistance, high drying speed and good corrosion resistance.
In the invention, the film-forming assistant in the component A is formed by mixing propylene glycol monobutyl ether and propylene glycol methyl ether acetic acid vinegar according to the weight ratio of (1.5-2.5) to 1.
In the invention, the zinc powder in the component A adopts 500-mesh spherical zinc powder and 800-mesh flaky zinc powder. The weight ratio of the 500-mesh spherical zinc powder to the 800-mesh flaky zinc powder is (0.4-0.8): 1.
The flaky zinc powder has the advantages of strong shielding effect, good anti-settling property, small zinc powder consumption and the like, but is not easy to disperse; spherical zinc powders have a weak shielding effect and a slightly inferior sedimentation resistance, but are more easily dispersed than flaky zinc powders. Under the conditions of same paint film thickness and certain total zinc powder consumption, along with the increase of the weight ratio of spherical zinc powder to flaky zinc powder, water, oxygen and ions are easier to diffuse in the coating, the shielding effect is poor, and the corrosion resistance of the coating is relatively poor. On the contrary, the content of the flaky zinc powder is relatively increased along with the reduction of the weight ratio of the spherical zinc powder to the flaky zinc powder, the spherical zinc powder has only a few layers under the condition of the same paint film thickness, and the flaky zinc powder can reach hundreds of layers, and a parallel overlapping and overlapping arrangement system is formed in the coating, so that the porosity of the coating is reduced, the shielding property of the coating is improved, the diffusion of water, oxygen and ions in the coating is obviously reduced, and the corrosion resistance of the coating is greatly improved. However, when the ratio of spherical zinc powder to flaky zinc powder is reduced to a certain weight ratio, the pigment is mainly flaky zinc powder, the flaky structure reduces the diffusion of water, oxygen, and ions in the coating layer, and the water resistance gradually becomes good, but flaky zinc powder fails faster than spherical zinc powder, and thus the salt water and salt spray resistance become worse. In view of the above, in order to further improve the high resistance of the aqueous zinc-rich primer, the ratio of the spherical zinc powder to the flaky zinc powder is determined to be (0.4 to 0.8): 1.
In the invention, the total weight percentage of the 500-mesh spherical zinc powder and the 800-mesh flaky zinc powder in the component A in the formula is 65-85%.
Zinc powder is an active pigment with good antirust property and atmospheric corrosion resistance, and can protect a steel structure, the reason is that the electrode potential of zinc is-0.7628V, the electrode potential of iron is-0.409V, when water enters a coating film, the zinc powder and steel form a microcell, and because the electrode potential of zinc is lower than that of iron, corrosion current flows from zinc to iron, and the steel is subjected to cathodic protection. Meanwhile, zinc salt generated by corrosion of zinc powder can fill the pores of the coating to seal the damaged part of the coating, protect the zinc particles on the lower layer, delay the corrosion of the zinc particles and further protect the surface of the steel. With the increase of the zinc content, the salt water resistance and the salt fog resistance of the paint film are obviously improved, but the adhesive force of the paint film is reduced. This is because the resin content in the zinc-rich primer is reduced with the increase of the amount of zinc powder, the film-forming substance is relatively reduced, and when a certain critical point is reached, the resin in the zinc-rich primer is insufficient to coat all the zinc powder, so that a continuous and dense coating film cannot be formed, and various properties of the coating film are changed. The adhesion and shielding effect of the paint film are weakened, so that a corrosion medium can directly permeate the surface of the zinc powder, the zinc powder is corroded, the volume of zinc powder particles is increased, and the possibility of coating foaming is increased. The invasion of corrosive media into the coating causes corrosion of the substrate surface, resulting in the peeling of the paint film. The experimental research result of the invention shows that when the total content of the zinc powder in the formula exceeds 85 percent, all the performances of the paint film are reduced. Comprehensively considered, the total weight percentage of the spherical zinc powder and the flaky zinc powder in the formula is 65-85%.
In the invention, the filler in the component A is 1250-mesh talcum powder.
While the dispersant in component A is a polymeric dispersant, the novel high molecular weight dispersant Additol VXW 6208/60 is preferred in the present invention.
This patent investigated the effect of high molecular polymer type, polycarboxylate type and organophosphate type dispersants on the resistance of the coating film. When a high-molecular polymer dispersant is used, the overall resistance of the coating film is best, and the initial water resistance of the coating film is not less than 480h, about 10 times that of a polycarboxylate dispersant and 2.9 times that of an organic phosphate dispersant; the salt spray resistance of the coating film is not bubbling and rusty after 3000 hours, and is about 7.5 times of that of polycarboxylate dispersant and about 5 times of that of organic phosphate dispersant. The high molecular polymer dispersant has good water resistance, better compatibility with epoxy resin and amine curing agent, and excellent water resistance while having dispersion performance.
In the invention, the defoaming agent in the component A is TEGO FOAMEX 810.
In the invention, the anti-settling agent in the component A is prepared by compounding an anti-settling agent 1, an anti-settling agent 2 and an anti-settling agent 3 according to the weight percentage of (1.0-1.5): (1.2-1.8): 1.
Further, the anti-settling agent 1 is attapulgite provided by Yongfeng chemical Co., ltd, zhongshan city, the anti-settling agent 2 is Bentone EW NA bentonite provided by ELEMENTIS, and the anti-settling agent 3 is fumed silica M-5 provided by Cambot.
The single anti-settling agent (attapulgite, bentonite and fumed silica) can improve the anti-settling property and the anti-sagging property of the two-component water-based epoxy zinc-rich coating to a certain extent, but the effect is not obvious. However, when 3 thixotropic agents of attapulgite, bentonite and fumed silica are compounded according to the weight percentage of (1.0-1.5): 1.2-1.8): 1, the anti-settling problem and the anti-sagging problem in the water-based epoxy zinc-rich primer can be effectively solved. The main reasons are as follows: the layer chain structure of the attapulgite, the layered structure of the bentonite and the mesh structure (three-dimensional) of the air-silicon can play a good role in synergy, thereby playing a good role in preventing sinking and sagging of a coating system.
In the invention, the epoxy emulsion in the component B is an epoxy resin BECKOPOX newly provided in the United states TM EP 384w。
In the present invention, the anti-flash rust agent in component B is the anti-flash rust agent FA-179 provided by Hamming (courtship).
In the invention, the thickener in the component B is a polyurethane thickener SN612 provided by Guangzhou chemical company Limited.
The invention also provides a preparation method of the high-resistance water-based epoxy zinc-rich primer, which comprises the following specific steps:
(1) Preparing a component A: adding modified alicyclic amine waterborne curing agent, modified polyamide waterborne curing agent, film-forming assistant, 500-mesh spherical zinc powder, 800-mesh flaky zinc powder, filler, dispersant, defoamer, anti-settling agent and other components into a dispersion cylinder according to the formula amount in sequence, and dispersing at the rotating speed of 1200-1500 r/min until the fineness of the finished product is less than or equal to 50um and the viscosity is 100-150 s;
(2) Preparing a component B: adding epoxy emulsion, anti-flash rust agent, thickening agent and water into a dispersion cylinder according to the formula amount, dispersing for 20-30 min at the rotating speed of 800-1000 r/min, filtering and packaging;
(3) And (3) uniformly mixing the component A and the component B according to the weight ratio of 3.
Compared with the prior art, the invention has the beneficial effects that:
1) The content of Volatile Organic Compounds (VOC) of the product is effectively controlled within 50g/L, which is far lower than the VOC content limit of 200g/L of a water-based zinc-rich primer in the chemical industry standard HG/T5176-2017 waterborne anticorrosive paint for steel structures in the chemical industry standard of the people's republic of China, and the product is a real healthy and environment-friendly waterborne paint product.
2) The product drying speed is high; the surface drying time is less than or equal to 0.6h, and the actual drying time is less than or equal to 9.2h, which are far less than the surface drying time (4 h) and the actual drying time (24 h) of the medium-water zinc-rich primer in the chemical industry standard HG/T5176-2017 waterborne anticorrosive coating for steel structures in the China, so that the quick drying property of the product is realized.
3) The freeze-thaw resistance stability and the storage stability are good, the anti-sagging performance is excellent, the anti-settling effect is good, the workability is easy, and the operation is convenient; the paint film of the product has strong adhesion to the substrate and good impact resistance; .
4) The product has extremely high tolerance, which is particularly represented by initial water resistance, flash rust resistance and salt spray resistance; the product has excellent initial water resistance, and the initial water resistance time is far longer than the initial water resistance time (24 h) of similar products in the industry and the industry standard, and reaches more than 480 h; the flash rust resistance of the product is outstanding, and through testing after curing for 24h under the conditions specified in GB/T9278-2008, the surface of a coating film has no penetrating rust and the substrate has no rust points; the salt spray resistance of the product is excellent, the salt spray resistance time is far longer than that of similar products in the industry standard and industry (600 h), the salt spray resistance time reaches more than 2400h, and the product does not blister or rust.
Detailed Description
In this embodiment, a high-resistance waterborne epoxy zinc-rich primer is composed of the following components, by weight:
component A
Wherein the sum of the weight percentages of the components in the component A is one hundred percent;
b component
Wherein the sum of the weight percentages of the components in the component B is one hundred percent.
The film-forming assistant in the component A is formed by mixing propylene glycol butyl ether and propylene glycol methyl ether acetic acid according to the weight ratio of (2.0-4.0) to (1.0-3.0); the dispersant is a high molecular weight dispersant Additol VXW 6208/60; the antifoaming agent is TEGO FOAMEX 810; the anti-settling agent is prepared by compounding an anti-settling agent 1, an anti-settling agent 2 and an anti-settling agent 3 according to the weight percentage of (0.8-1.2) to (1.0-1.4) to (0.6-1.0), wherein the anti-settling agent 1 is attapulgite provided by Yongfeng chemical industry Co., ltd, zhongshan city, the anti-settling agent 2 is Bentoni EWNA bentonite provided by ELEMENTIS, and the anti-settling agent 3 is fumed silica M-5 provided by Cambot.
The epoxy emulsion in the component B is an epoxy resin BECKOPOX newly provided in the United states TM EP 384w; the anti-flash rust agent is an anti-flash rust agent FA-179 provided by Haimines (D.modest); the thickener is a polyurethane thickener SN612 provided by Guangzhou chemical company Limited.
The preparation method of the high-resistance waterborne epoxy zinc-rich primer provided by the embodiment comprises the following specific steps:
(1) Preparing a component A:
the modified alicyclic amine water-based curing agent, the modified polyamide water-based curing agent, the film-forming assistant, 500-mesh spherical zinc powder, 800-mesh flaky zinc powder, a filler (talcum powder), a dispersing agent, a defoaming agent, an anti-settling agent and other components are sequentially added into a dispersion cylinder according to the weight percentage, the high-speed dispersion is carried out for 30-50 minutes, and the high-speed dispersion speed is 1200-1500 r/min. Sampling and detecting the fineness and viscosity of the finished product, and obtaining the component A when the fineness of the finished product is less than or equal to 50um and the viscosity is 100-150 s.
(2) Preparing a component B:
adding the epoxy emulsion, the flash rust inhibitor, the thickening agent and water into a dispersion cylinder according to the weight percentage, and dispersing for 20-30 minutes at a medium speed, wherein the medium speed is 800-1000 r/min. Filtering and packaging.
(3) And (3) uniformly mixing the component A and the component B according to the weight ratio of 3.
The present invention will be further described with reference to the following examples, but is not limited thereto.
In this specific example, examples 1 to 5 were provided to prepare the high-resistance waterborne epoxy zinc-rich primer of the present invention, wherein the formulations of the components a and B are shown in table 1, and the formulation compositions are calculated by the raw materials in mass percent (%):
TABLE 1 formulation of high resistance waterborne epoxy zinc rich primer (unit:%)
Products of the highly resistant waterborne zinc-rich epoxy primers of examples 1-5 were prepared and tested according to the above-described preparation method of the highly resistant waterborne zinc-rich epoxy primer according to the raw material formulation of examples 1-5 above.
Performance test
The products of the high-resistance waterborne epoxy zinc-rich primer prepared in the embodiments 1 to 5 of the invention and similar products sold in the market are subjected to spraying construction and performance detection.
Carrying out main body performance test according to the standards of ' HG/T5176-2017 ' waterborne anticorrosive coating for steel structure ' and ' waterborne coating for technical requirement of HJ 2537-2014 environmental mark products '; other basic performance tests were carried out according to the method specified in HG/T3668-2009.
And (5) testing initial water resistance. Testing after maintaining for 24h under the conditions specified in GB/T9278-2008; and (3) immersing one half of the coating of the test plate in purified water for a certain time, taking out the test plate, and carrying out visual observation, wherein if the coating morbid phenomena such as foaming, rusting, cracking, peeling and the like do not occur in the immersed area, and after the test plate is recovered for 2 hours under standard conditions, the immersed area does not obviously change color compared with the non-immersed area, and the test plate is considered to be normal.
And (5) carrying out flash rust resistance test. Testing after curing for 24h under the conditions specified in GB/T9278-2008, and visually observing whether the surface of the coating film has penetrating rust; immediately thereafter, the test panel was immersed in a methyl ethyl ketone solvent to remove the coating film, and the presence or absence of rust spots on the substrate was visually observed. If the surface of the coating film was visually observed to have no rust-penetrating and no rust spot on the substrate, the evaluation was "normal", otherwise, the evaluation was "failed".
The results of examining the main performance indexes of the products prepared in examples 1 to 5 and the similar products on the market are shown in table 2.
Table 2 test results
According to the test results in the table 2, the content of Volatile Organic Compounds (VOC) of the high-resistance waterborne epoxy zinc-rich primer prepared in the embodiments 1 to 5 is effectively controlled within 50g/L, which is far lower than the VOC content limit of 200g/L of the waterborne zinc-rich primer in the chemical industry standard "HG/T5176-2017 waterborne anticorrosive coating for steel structure" of the people's republic of China, and the primer is a truly healthy and environment-friendly waterborne coating product. The product has high drying speed. The surface drying time is less than or equal to 0.6h, and the actual drying time is less than or equal to 9.2h, which are far less than the surface drying time (4 h) and the actual drying time (24 h) of the water-based zinc-rich primer in the chemical industry standard HG/T5176-2017 waterborne anticorrosive coating for steel structures in the chemical industry standard of the people's republic of China, and the characteristic of quick drying of products is realized. The product has good freeze-thaw resistance stability and storage stability, excellent anti-sagging performance, good anti-settling effect, easy application and convenient operation. The paint film of the product has strong adhesion to the substrate and good impact resistance. In particular, the product of the invention has very high resistance, particularly in initial water resistance, flash rust resistance and salt spray resistance. The product has excellent initial water resistance, the initial water resistance time is far longer than the initial water resistance time (24 h) of similar products in the industry and the industry standard, and the initial water resistance reaches more than 480 h. The flash rust resistance of the product is outstanding, and the test is carried out after the product is maintained for 24 hours under the condition specified in GB/T9278-2008, so that the surface of a coating film has no penetrating rust and the substrate has no rust points. The salt spray resistance of the product is excellent, the salt spray resistance time is far longer than that of similar products in the industry standard and industry (600 h), the salt spray resistance time reaches more than 2400h, and the product does not blister or rust.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and any technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present invention.
Claims (10)
1. The high-resistance water-based epoxy zinc-rich primer is characterized by consisting of a component A and a component B in percentage by weight as follows:
component A
Wherein the sum of the weight percentages of the components in the component A is one hundred percent;
b component
Wherein the sum of the weight percentages of the components in the component B is one hundred percent.
2. The high resistance waterborne epoxy zinc rich primer of claim 1, characterized in that: the weight ratio of the modified alicyclic amine water-based curing agent to the modified polyamide water-based curing agent in the component A is (1.2-1.3) to 1.
3. The high resistance waterborne epoxy zinc rich primer of claim 1, characterized in that: the film-forming assistant in the component A is formed by mixing propylene glycol monobutyl ether and propylene glycol monomethyl ether acetate according to the weight ratio of (1.5-2.5) to 1.
4. The high resistance waterborne epoxy zinc rich primer of claim 1, characterized in that: the weight ratio of the spherical zinc powder of 500 meshes to the flaky zinc powder of 800 meshes in the component A is (0.4-0.8): 1.
5. The high resistance waterborne epoxy zinc rich primer of claim 1, characterized in that: the filler in the component A is 1250-mesh talcum powder; the dispersant is a high molecular polymer dispersant; the defoamer in the component A is TEGO FOAMEX 810.
6. The high resistance waterborne epoxy zinc rich primer of claim 5, wherein: the high molecular weight polymeric dispersant is selected from the high molecular weight dispersant Additol VXW 6208/60, which is highly new in the United states.
7. The highly resistant waterborne epoxy zinc rich primer according to claim 1, characterized in that: the anti-settling agent in the component A is prepared by compounding an anti-settling agent 1, an anti-settling agent 2 and an anti-settling agent 3 according to the weight ratio of (1.0-1.5) to (1.2-1.8) to 1.
8. The highly resistant waterborne epoxy zinc rich primer of claim 7, characterized in that: the anti-settling agent 1 is attapulgite provided by Yongfeng chemical company Limited in Zhongshan; the anti-settling agent 2 is Bentone EW NA bentonite provided by ELEMENTIS; the anti-settling agent 3 is fumed silica M-5 provided by cabot.
9. The high resistance waterborne epoxy zinc rich primer of claim 1, characterized in that: the epoxy emulsion in the component B is an epoxy resin BECKOPOX newly provided by America TM EP 384w, the anti-flash rust agent is hamming's (modesty) supplied anti-flash rust agent FA-179 and the thickener is guangzhou guanzhi chemical ltd supplied polyurethane thickener SN612.
10. A method for preparing a high resistance waterborne epoxy zinc rich primer according to any one of claims 1 to 9, characterized by comprising the steps of:
(1) Preparing a component A: adding modified alicyclic amine waterborne curing agent, modified polyamide waterborne curing agent, film-forming assistant, 500-mesh spherical zinc powder, 800-mesh flaky zinc powder, filler, dispersant, defoamer, anti-settling agent and other components into a dispersion cylinder according to the formula amount in sequence, and dispersing at the rotating speed of 1200-1500 r/min until the fineness of the finished product is less than or equal to 50um and the viscosity is 100-150 s;
(2) Preparing a component B: adding epoxy emulsion, anti-flash rust agent, thickening agent and water into a dispersion cylinder according to the formula amount, dispersing for 20-30 min at the rotating speed of 800-1000 r/min, filtering and packaging;
(3) And (3) uniformly mixing the component A and the component B according to the weight ratio of 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211076371.9A CN115353795A (en) | 2022-09-05 | 2022-09-05 | High-resistance water-based epoxy zinc-rich primer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211076371.9A CN115353795A (en) | 2022-09-05 | 2022-09-05 | High-resistance water-based epoxy zinc-rich primer and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115353795A true CN115353795A (en) | 2022-11-18 |
Family
ID=84005697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211076371.9A Pending CN115353795A (en) | 2022-09-05 | 2022-09-05 | High-resistance water-based epoxy zinc-rich primer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115353795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116254035A (en) * | 2023-03-10 | 2023-06-13 | 中科博翰新材料(北京)有限公司 | Novel high-salt-fog-resistance water-based epoxy heavy-duty anticorrosive paint |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108690456A (en) * | 2018-03-15 | 2018-10-23 | 河北晨阳工贸集团有限公司 | A kind of water-based epoxy zinc-rich primer and preparation method thereof |
| CN110922857A (en) * | 2019-11-29 | 2020-03-27 | 安徽壹信通讯科技有限公司 | Water-based epoxy zinc-rich anti-rust primer for railway steel bridge and preparation method thereof |
| CN111234654A (en) * | 2020-03-24 | 2020-06-05 | 沈阳派尔化学有限公司 | Novel water-based epoxy zinc-rich primer and preparation method thereof |
| CN114686070A (en) * | 2020-12-28 | 2022-07-01 | 中海油常州涂料化工研究院有限公司 | Water-based epoxy zinc-rich primer and preparation method thereof |
-
2022
- 2022-09-05 CN CN202211076371.9A patent/CN115353795A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108690456A (en) * | 2018-03-15 | 2018-10-23 | 河北晨阳工贸集团有限公司 | A kind of water-based epoxy zinc-rich primer and preparation method thereof |
| CN110922857A (en) * | 2019-11-29 | 2020-03-27 | 安徽壹信通讯科技有限公司 | Water-based epoxy zinc-rich anti-rust primer for railway steel bridge and preparation method thereof |
| CN111234654A (en) * | 2020-03-24 | 2020-06-05 | 沈阳派尔化学有限公司 | Novel water-based epoxy zinc-rich primer and preparation method thereof |
| CN114686070A (en) * | 2020-12-28 | 2022-07-01 | 中海油常州涂料化工研究院有限公司 | Water-based epoxy zinc-rich primer and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴栋 等: "地热水集输管线无溶剂重防腐涂料的制备与性能研究" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116254035A (en) * | 2023-03-10 | 2023-06-13 | 中科博翰新材料(北京)有限公司 | Novel high-salt-fog-resistance water-based epoxy heavy-duty anticorrosive paint |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107964351B (en) | Water-based composite zinc-aluminum anticorrosive paint | |
| CN108178964A (en) | A kind of graphene solvent free corrosion prevention coating and technology of preparing | |
| WO2014169866A1 (en) | Zinc-rich epoxy anti-corrosion coating and preparation method thereof | |
| KR100910983B1 (en) | Environment-friendly coating process of steels or steel construction using for anti-staining | |
| CN109370364B (en) | Nano anticorrosive paint for metal surface in acid-related environment and preparation method thereof | |
| CN110982380A (en) | Water-based epoxy resin cabin coating and preparation method thereof | |
| CN111234654A (en) | Novel water-based epoxy zinc-rich primer and preparation method thereof | |
| CN103232786A (en) | Solvent-free nanometer epoxy anticorrosive paint and preparation method thereof | |
| JP6242318B2 (en) | Weak solvent type high corrosion resistance coating composition using Sn ions | |
| CN111073507A (en) | Water-based chromium-free zinc-aluminum anticorrosive paint and preparation method thereof | |
| CN115353795A (en) | High-resistance water-based epoxy zinc-rich primer and preparation method thereof | |
| CN110938350A (en) | Epoxy primer for rail transit and preparation method thereof | |
| CN114921145A (en) | Modified graphene anticorrosive paint and preparation method thereof | |
| CN102533052B (en) | Solvent-free type epoxy zinc rich primer and preparation method thereof | |
| KR101803966B1 (en) | Solvent-free epoxy type anticorrosive paint composition for ships | |
| JP5993799B2 (en) | High corrosion resistance coating composition using Sn ions | |
| CN102533060B (en) | Solvent-free type fiber reinforced epoxy paint and preparation method thereof | |
| CN108531043B (en) | Rare earth modified graphene water-based zinc-rich primer | |
| CN112724790B (en) | Polysulfide compound modified epoxy coating and corrosion prevention process for steel structure of coastal power plant | |
| CN114032004A (en) | Water-based epoxy coating and preparation method thereof | |
| CN111909573A (en) | Graphene modified high chlorinated polyethylene resin anticorrosive paint and preparation method thereof | |
| CN106366874A (en) | Alkyd water-based anti-rust paint and coating method thereof | |
| CN110628306A (en) | High-corrosion-resistance water-based phenolic epoxy coating | |
| CN110066572A (en) | A kind of cable stand anti-corrosive coating | |
| CN112852260B (en) | Durable epoxy resin anticorrosive paint and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |