CN112898864B - Anticorrosive epoxy resin coating - Google Patents

Anticorrosive epoxy resin coating Download PDF

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CN112898864B
CN112898864B CN202110037814.2A CN202110037814A CN112898864B CN 112898864 B CN112898864 B CN 112898864B CN 202110037814 A CN202110037814 A CN 202110037814A CN 112898864 B CN112898864 B CN 112898864B
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epoxy resin
component
metal oxide
epoxy
corrosion
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CN112898864A (en
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周伟建
李灿辉
王维
符传杰
周靖洋
谢仲洪
许金河
黎应棋
宋献军
谢寅峰
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Guangdong Maydos Building Materials Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • 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
    • C08G59/20—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 epoxy compounds used
    • C08G59/22—Di-epoxy compounds
    • C08G59/26—Di-epoxy compounds heterocyclic
    • 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
    • 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
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
    • C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2244—Oxides; Hydroxides of metals of zirconium
    • 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
    • C08K2201/011—Nanostructured additives

Abstract

The invention provides an anticorrosive epoxy resin coating, which comprises a component A: the component A comprises, by mass, 30-70 parts of epoxy resin, an epoxy group and a pyrrolidone ring in a molecular structure of the epoxy resin, wherein the epoxy group is directly connected with ring-forming atoms of the pyrrolidone ring or directly connected with the ring-forming atoms of the pyrrolidone ring through an alkylene group, 10-15 parts of metal oxide and 10-35 parts of an organic solvent. In the epoxy molecular structure adopted by the invention, the epoxy group is directly connected with the ring-forming atoms of the pyrrolidone ring, the pyrrolidone ring has no aromaticity, and compared with the conventional epoxy resin, the aromatic ether bond content in the molecular structure is obviously lower, so that the absorption of the group connected with the epoxy group to ultraviolet light is inhibited, the light stability of a cross-linked network in a paint film is effectively improved, the paint film has good weather resistance and corrosion resistance effects, and the paint film can resist yellowing for a long time and keep the paint surface smooth.

Description

Anticorrosive epoxy resin coating
Technical Field
The invention belongs to the field of chemical coatings, and particularly relates to an anticorrosive epoxy resin coating.
Background
The epoxy resin is a generic term which contains 2 or more epoxy groups in the molecular structure and can form a three-dimensional network cured product under appropriate conditions. The epoxy resin has the advantages of high mechanical property, strong adhesive force, small curing shrinkage, good chemical stability and the like, and is widely applied to the field of coatings. The general epoxy resin paint has good adhesive force to metals such as iron, aluminum and the like, has tough paint film and strong corrosion resistance, is largely used for preparing priming paint, finishing paint, varnish, enamel paint and the like which are suitable for metals, electrical appliances and outdoor equipment, and protects base materials from corrosion of corrosive materials such as atmosphere, rain mist, seawater and the like. However, the conventional epoxy resins (e.g., bisphenol a epoxy resin) generally contain a large amount of aromatic ether bonds, and the cured product is easily degraded and broken after being irradiated by sunlight, so that the formed coating is exposed to air and sunlight for a long time, the self-aging condition is increased along with the increase of time, and the corrosion prevention effect is exponentially reduced.
Disclosure of Invention
The invention aims to provide an anticorrosive epoxy resin coating to improve the weather resistance of the epoxy resin coating.
According to one aspect of the present invention, there is provided a corrosion-resistant epoxy resin coating comprising component a: the component A comprises, by mass, 30-70 parts of epoxy resin, wherein the epoxy resin has a molecular structure comprising an epoxy group and a pyrrolidone ring, the epoxy group is directly connected with ring-forming atoms of the pyrrolidone ring or is connected with the ring-forming atoms of the pyrrolidone ring through an alkylene group, and the component A further comprises 10-15 parts of metal oxide and 10-35 parts of an organic solvent.
In the epoxy molecular structure adopted by the invention, the epoxy group is directly connected with the ring-forming atoms of the pyrrolidone ring, the pyrrolidone ring has no aromaticity, and compared with the conventional epoxy resin, the aromatic ether bond content in the molecular structure is obviously lower, so that the absorption of the group connected with the epoxy group to ultraviolet light is inhibited, the light stability of a cross-linked network in a paint film is effectively improved, the paint film has good weather resistance and corrosion resistance, and the paint film can resist yellowing for a long time and keep the paint surface smooth. On the other hand, the epoxy resin adopted by the invention has a pyrrolidone group structure, and the pyrrolidone group can form a surface chemical bond with the metal oxide, so that fine particles are prevented from being agglomerated into blocks, the uniformity and the application performance of the coating are improved, and a compact paint film is favorably formed.
Preferably, in the molecular structure of the epoxy resin, the group composed of the epoxy group and the pyrrolidone ring is a 3, 4-epoxy-2, 5-pyrrolidone group. The 3, 4-epoxy-2, 5-pyrrolindione group has a condensed ring structure containing epoxy groups, has higher cross-linking curing reaction activity, and can ensure that the prepared epoxy resin coating has good quick drying property and is convenient for construction.
Preferably, the epoxy resin has the general structural formula
Figure BDA0002893990870000021
Wherein R is a linear or branched C4-C30 alkylene. The 3, 4-epoxy-2, 5-pyrrolindione group is connected by using a longer carbon chain, so that a paint film formed by the epoxy resin has good adhesive force and toughness.
Preferably, the metal oxide is selected from at least one of iron oxide, cerium oxide, zinc oxide, zirconium oxide, tin oxide, titanium dioxide.
Preferably, the metal oxide comprises cerium oxide, and the cerium oxide is CeO2Nanoparticles of CeO2The mass percentage of the nano particles in the metal oxide is not less than 85%. Using CeO2The nanoparticles, as a metal oxide component in the coating, can form dense cerium hydroxide in the active region with high alkalinity, thereby enabling the coating to show stronger corrosion resistance. Further, CeO2The nano particles have strong absorption capacity and shielding effect on ultraviolet rays, can inhibit epoxy resin from chain scission under sunlight irradiation, and effectively improves the anti-aging capacity of a paint film.
Preferably, the metal oxide comprises zirconium oxide, the zirconium oxide being ZrO2Nano particles of, calculated as mass ratio, ZrO2The amount of the nano particles is CeO21-8% of the nanoparticles. ZrO (ZrO)2In order to have a wide band gap which itself can strongly absorb ultraviolet rays, CeO is added thereto2Simultaneously use of, ZrO2OfThe strip can effectively dredge CeO2To further strengthen the CeO2Ultraviolet absorption effect of the nanoparticles. Second, ZrO2The addition of the (B) can also effectively improve the wear resistance of a paint film.
Preferably, the organic solvent is selected from at least one of butanol, methyl ethyl ketone and xylene.
Preferably, the component A further comprises 5-10 parts of talcum powder by mass.
Preferably, the composite material further comprises a component B, and the component B comprises 30-70 parts by mass of polyamide resin. The polyamide resin can be dissolved in various solvents, has good miscibility with the epoxy resin, is used as a curing agent to be matched with the epoxy resin, and can generate crosslinking curing reaction only by reaching lower temperature, so that the two-component anticorrosive coating provided by the invention has good quick drying property and is convenient for construction. In addition, the polyamide resin contains longer carbon chains and polar groups, and after the polyamide resin is mixed with the epoxy resin, the adhesion and the toughness of the epoxy resin paint can be remarkably improved.
Preferably, the polyamide resin contains carbon-silicon bonds in the main chain. The polyamide resin adopted by the invention contains organic silicon, so that the polyamide resin has stronger reactivity, and the quick-drying property of the epoxy resin coating can be further improved by using the polyamide resin as the curing agent of the epoxy resin coating.
In conclusion, the anticorrosive epoxy resin coating provided by the invention has the following advantages:
1. the paint can be quickly crosslinked and cured at normal temperature, has good ductility and adhesive force, and is convenient to construct;
2. a compact paint film can be formed, and the corrosion resistance is good;
3. the paint film has good ultraviolet radiation resistance, and the paint film formed by the paint film has good ageing resistance.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, 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 only a part of the embodiments of the present invention, and not all embodiments.
The test methods used for the paint film performance tests referred to in the following examples are shown in table 1, wherein the test period for the following test items is 20 days: water resistance, acid resistance, salt water soaking, humidity resistance and salt mist resistance.
TABLE 1 paint Performance test
Figure BDA0002893990870000031
Figure BDA0002893990870000041
Example 1
1. Preparation of silicon atom-containing Polyamide resins
The polyamide resin was prepared as follows:
step 1: adding 54.42g glutaramide into 100.00g toluene, heating to 195 deg.C and holding for 15 min;
step 2: 158.27g of polydimethylsiloxane (average DP of 100) and 2g of platinum (0) -1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane were weighed out;
and step 3: 5g of polydimethylsiloxane were added dropwise to the reaction mixture;
and 4, step 4: adding 0.8-1 g of platinum (0) -1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane into the reaction mixture;
and 5: adding the remaining polydimethylsiloxane dropwise to the reaction mixture;
step 6: adding the remaining platinum (0) -1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane to the reaction mixture, and continuing the reaction for 1 hour, during which stirring is provided;
and 7: negative pressure distillation is carried out to remove the solvent, and the polyamide resin with the following general structure is obtained:
Figure BDA0002893990870000042
marking as Polyamide resins I, X1And X2Is a C1 to C4 alkylene chain. The number average molecular weight of the obtained product was 28500.
2. Preparation of epoxy resins
(1) Preparation of epoxy resin I
Using maleimide as raw material, according to the following synthetic route, the compound with the structural formula as shown in the specification is prepared
Figure BDA0002893990870000051
The product of (a) is epoxy resin I.
Figure BDA0002893990870000052
(2) Preparation of epoxy resin II
Figure BDA0002893990870000053
Using maleimide as raw material, and adopting the above-mentioned synthetic route to obtain the invented product whose structural formula is shown in the specification
Figure BDA0002893990870000061
The product of (a) is epoxy resin II.
Example 2
The corrosion-resistant epoxy resin coating provided by this example includes component a and component B. This example sets four treatment groups, labeled treatment IA, treatment IIA, treatment IIIA and treatment IVA, respectively, by constructing variables in the formulation of component A that makes up the epoxy coating described above. 3 different epoxy resins were respectively used as the epoxy resin for formulating component A to set the above-mentioned treatment IA, treatment IIA, treatment IIIA: treatment IA with the epoxy resin I prepared in example 1 as the epoxy resin used to formulate component A; treatment IIA with the epoxy resin II prepared in example 1 as the epoxy resin used to formulate component A; treatment of IIIA with commercially available bisphenol AIs an epoxy resin used for preparing the component A; the raw materials for preparing the component A in the treatment IA, the treatment IIA and the treatment IIIA are shown in Table 2, and the component A is obtained by fully mixing the required raw materials in proportion according to the table 2 in the three treatment groups. The raw materials for preparing component A by treating IVA described above are shown in Table 3, and the structure of 1, 4-dihydromaleimidobutane described in Table 3 is
Figure BDA0002893990870000062
Component B is a curing agent component, and the polyamide resin I obtained in example 1 was used for component B in each treatment group of this example.
TABLE 2 composition of formula for Process IA, Process IIA and Process IIIA Components A
Figure BDA0002893990870000063
Figure BDA0002893990870000071
TABLE 3 composition of formulation A for treatment of IVA
Figure BDA0002893990870000072
When the epoxy resin coatings of each treatment group are used, the component A and the component B are uniformly mixed according to the mass ratio of 2:1, then coating templates are respectively prepared by adopting the epoxy resin coatings in the treatment groups of 2 in the embodiment according to the national standard GB/T1727 paint film general preparation method, the tested epoxy resin coatings and the formed coating templates are subjected to conventional performance tests, and the test results are shown in Table 4. The performance test results of this example show that compared with the treatment IIIA and the treatment IVA of the epoxy resin coating prepared by using the commercial bisphenol A, the epoxy resin coating prepared by using the treatment IA and the treatment IIA has more excellent ultraviolet resistance, because the commercial bisphenol A contains a large number of aromatic ether bonds and is easy to break under the irradiation of ultraviolet light to cause the aging of a paint film, and in the epoxy resin used for treating the IA and the treatment IIA, epoxy groups are connected with ring-forming atoms of a pyrrolidone ring directly or through alkylene groups, so that the damage of ultraviolet light to the paint film structure is effectively inhibited, and in addition, the adhesive force and the impact resistance of the epoxy resin coating prepared by using the treatment IA and the treatment IIA are also obviously better. By comparing the performance indexes of the coating prepared by treating IA and treating IIA, the fast drying property of the coating prepared by treating IA is found to be better, and the construction under the low-temperature environment is facilitated.
Table 4 coating performance testing of example 2
Figure BDA0002893990870000073
Figure BDA0002893990870000081
Example 3
The epoxy resin coating provided by the embodiment comprises a component A and a component B, wherein the component B is a curing agent component, and 2 different materials are respectively adopted as the component B of the epoxy resin coating to set 2 groups of treatment groups. The specific setting mode of each treatment group is as follows: treatment IB with the polyamide resin I obtained in example 1 as component B; treatment IIB with commercially available polyamide 651 as component B. The formulation composition of component A of each treatment group was identical, the raw materials used for preparing component A are shown in Table 2, the required raw materials were mixed well in proportion according to Table 2 until uniform to obtain component A, and in this example, the epoxy resin I prepared in example 1 was used for preparing the epoxy resin of component A.
When the epoxy resin coatings of each treatment group are used, the component A and the component B are uniformly mixed according to the mass ratio of 2:1, then coating templates are respectively prepared by adopting the epoxy resin coatings in the treatment groups of 2 in the embodiment according to the national standard GB/T1727 paint film general preparation method, and the tested epoxy resin coatings and the formed coating templates are subjected to conventional performance tests, wherein the test results are shown in Table 5. In the two groups of treatment groups arranged in this embodiment, the epoxy resin finish prepared by treating ib exhibits a plurality of excellent performance indexes, wherein the improvement on the related indexes of quick drying, flexibility, ultraviolet resistance, and corrosion resistance is particularly significant, and introducing a silicon atom into the main chain of the polyamide resin is beneficial to improving the activity of the cross-linking curing reaction between the polyamide resin and the epoxy resin, improving the drying speed of the paint film, and simultaneously, is also beneficial to forming a dense and tough cross-linking network on the paint film, inhibiting corrosive substances from diffusing into the base material, and avoiding corrosion of the base material.
Table 5 paint performance testing of example 3
Figure BDA0002893990870000091
Figure BDA0002893990870000101
Example 4
The required materials were weighed according to table 6, the employed metal oxides contained two species, and the required species were mixed in proportion to obtain 8 species of metal oxides (mixture) labeled as metal oxide a, metal oxide B, metal oxide C, metal oxide D, metal oxide E, metal oxide F, metal oxide G, and metal oxide H, respectively.
Table 6 example 4 metal oxide composition for formulating component a
Group of Metal oxide composition (parts by mass)
Metal oxide A Nano Fe2O312 portions of
Metal oxide B Nano CeO212 portions of
Metal oxide C 12 portions of nano ZnO
Metal oxide D Nano ZrO212 portions of
Metal oxide E Nano CeO211.4 parts of + nano Fe2O30.6 part
Metal oxide F Nano CeO211.4 parts of nano ZnO and 0.6 part of nano ZnO
Metal oxide G Nano CeO211.4 parts of nano ZrO20.6 part
Metal oxide H Nano ZrO211.4 portions of CeO + nano material20.6 part
Then, 0.5g of the metal oxide used in each treatment group was dispersed in 5mL of cyclohexane, and then 320nm of UV absorbance was measured using cyclopentane containing the above metal oxide, and the results are shown in Table 7. The metal oxides A to D are single-component metal oxides, wherein the nanometer CeO2And nano ZrO2All have good ultraviolet absorption characteristics. The metal oxides E to F being lightly dopedThe two-component metal oxide of (1) is prepared by mixing nano CeO2In the case of a bulk, nano-ZrO is used2The doping can obviously improve the ultraviolet light absorptivity of the metal oxide, and the ultraviolet light absorptivity of the metal oxide H is obviously higher than that of the metal oxide E and the metal oxide F. However, in the nano-ZrO range2Mainly adopts nano CeO2But has no obvious improvement effect on the ultraviolet absorptivity of the metal oxide.
Table 7 uv absorbance test results
Group of Absorbance at 320nm
Metal oxide A 12％
Metal oxide B 63％
Metal oxide C 48％
Metal oxide D 77％
Metal oxide E 62％
Metal oxide F 75％
Metal oxide G 97％
Metal oxide H 81％
According to the ultraviolet light absorption rate test result of the embodiment, the metal oxide B, the metal oxide D and the metal oxide G are selected to prepare the epoxy resin coating. The epoxy resin coating provided by the embodiment comprises a component a and a component B, the raw materials for preparing the component a in the embodiment are based on table 2, metal oxides of different types or compositions are respectively adopted to replace the metal oxide compositions in table 2, so as to prepare the component a, and 3 groups of treatment groups are set according to different types and compositions of the adopted metal oxides: treating IC, replacing metal oxide in Table 2 with metal oxide B to prepare component A; treating IIC, replacing the metal oxide in the table 2 with the metal oxide D to prepare a component A; for treatment IIIC, the composition of the metal oxide remains the same as in Table 2 (i.e., metal oxide G in this example). Except for this, the materials and the proportions used in the present treatment groups for formulating component A are the same as in Table 2. The raw materials required by the preparation component A are fully mixed according to the proportion for each treatment group until the mixture is uniform, and then the component A is obtained. Component B is a curing agent component, and the polyamide resin I obtained in example 1 was used for component B in each treatment group of this example.
When the epoxy resin coatings of each treatment group are used, the component A and the component B are uniformly mixed according to the mass ratio of 2:1, then coating templates are respectively prepared by adopting the epoxy resin coatings in the treatment groups of 2 in the embodiment according to the national standard GB/T1727 paint film general preparation method, the tested epoxy resin coatings and the formed coating templates are subjected to conventional performance tests, and the test results are shown in Table 8. As can be seen from the results of the tests, CeO was used separately from the above2Or ZrO2Compared with the prepared epoxy resin coating, the nano CeO is adopted2+ZrO2The epoxy resin coating prepared from the two-component metal oxide has more excellent ultraviolet resistance and corrosion resistance.
Table 8 paint performance testing of example 4
Figure BDA0002893990870000121
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the true spirit and scope of the present invention.

Claims (9)

1. An anti-corrosion epoxy resin coating comprises a component A and is characterized in that:
the component A comprises 30-70 parts of epoxy resin, wherein the epoxy resin comprises an epoxy group and a pyrrolidone ring in a molecular structure, the epoxy group is directly connected with ring-forming atoms of the pyrrolidone ring or is connected with the ring-forming atoms of the pyrrolidone ring through an alkylene group, and the component A also comprises 10-15 parts of metal oxide and 10-35 parts of an organic solvent;
the structural general formula of the epoxy resin is
Figure FDA0003553395050000011
Wherein R is a linear or branched C4-C30 alkylene.
2. The corrosion-inhibited epoxy resin coating according to claim 1, wherein: in the molecular structure of the epoxy resin, the epoxy group and the pyrrolidone ring form a group which is a 3, 4-epoxy-2, 5-pyrrolidone group.
3. The corrosion-inhibited epoxy resin coating according to claim 1, wherein: the metal oxide is at least one selected from iron oxide, cerium oxide, zinc oxide, zirconium oxide, tin oxide and titanium dioxide.
4. The corrosion-inhibited epoxy resin coating according to claim 3, wherein: the metal oxide comprises cerium oxide which is CeO2Nanoparticles of the CeO2The mass percentage of the nano particles in the metal oxide is not less than 85%.
5. The corrosion-inhibited epoxy resin coating according to claim 4, wherein: the metal oxide comprises zirconium oxide, and the zirconium oxide is ZrO2Nanoparticles, calculated as mass ratio, of said ZrO2The amount of the nano particles is the CeO21-8% of the nanoparticles.
6. The corrosion-inhibited epoxy resin coating according to claim 1, wherein: the organic solvent is selected from at least one of butanol, methyl ethyl ketone and xylene.
7. The corrosion-inhibited epoxy resin coating according to claim 1, wherein: the component A also comprises 5-10 parts of talcum powder by mass.
8. The corrosion-inhibited epoxy resin coating according to claim 1, wherein: the polyamide resin composition further comprises a component B, and the component B comprises 30-70 parts of polyamide resin by mass.
9. The corrosion-inhibited epoxy resin coating of claim 8, wherein: the main chain of the polyamide resin contains carbon-silicon bonds.
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CN104449248A (en) * 2014-08-28 2015-03-25 湖南中汉高分子材料科技有限公司 High-solid anti-rust and anti-corrosion coating
CN105153870A (en) * 2015-05-30 2015-12-16 成都拜迪新材料有限公司 Preparation method of ultralow temperature-cured and low temperature-resistant epoxy anticorrosive paint
CN106280905A (en) * 2016-08-31 2017-01-04 安徽纽亚达科技有限责任公司 A kind of anticorrosive paint and preparation method thereof

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