CN112980289B - Anti-corrosion wear-resistant bio-based composite coating and preparation method thereof - Google Patents
Anti-corrosion wear-resistant bio-based composite coating and preparation method thereof Download PDFInfo
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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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
- 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
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention relates to the field of coatings, and aims to provide an anticorrosive wear-resistant bio-based composite coating and a preparation method thereof. The coating comprises a component A and a component B, wherein the component A comprises cardanol-based epoxy resin, lignin-based epoxy resin, cardanol-based epoxy diluent, a dispersing agent, modified potassium magnesium titanate, a defoaming agent, a leveling agent and an anti-flash rust agent, and the component B comprises cardanol-modified amine epoxy curing agent, lignin-phenolic amine curing agent and aminoethyl piperazine. The invention has the performances of corrosion resistance, abrasion resistance, impact resistance and the like, and can provide effective protection effect for parts which are easy to corrode and abrade. The coating can form a film on common substrates such as stainless steel, aluminum alloy, wood and the like, and has good adhesive force with the substrates; the construction can be carried out by adopting the processes of brushing, spin coating, spraying and the like, and the construction is simple and easy; the preparation method has the advantages of simple preparation process, low cost, environmental protection and no pollution, and is suitable for large-scale industrial production.
Description
Technical Field
The invention belongs to the field of coatings, and particularly relates to a modified titanate bio-based composite coating and a preparation method thereof.
Background
The bio-based coating is a novel coating which is obtained by treating natural substances (such as cellulose, starch, lignin, chitin, collagen, wood, bamboo, crop straws and the like) formed in animals and plants in the nature by biological, physical or chemical modes and the like, and has the characteristics of environmental friendliness, reproducibility and the like. With the increasing trend of fossil energy crisis, environmental pollution and the like, the bio-based coating is a necessary trend for the development of the coating field, has a sufficient renewable raw material source and a very wide market application space, and will gradually become another emerging leading industry leading to the economic development and scientific and technological innovation of the world.
Currently, bio-based coatings are still in the initial development stage. In recent years, researchers have been continuously utilizing cardanol, lignin and other raw materials to design and synthesize bio-based polymer resin to prepare bio-based coating. However, compared with the traditional coating prepared from petroleum-based resin, the performances of the bio-based coating reported at present, such as corrosion resistance, abrasion resistance, impact resistance, toughness, adhesion and the like, are still quite different, and the application in the fields of oceans, buildings, industries and the like cannot be met, so that the bio-based coating is not popularized and applied in a large scale in the global scope.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides an anticorrosive wear-resistant bio-based composite coating and a preparation method thereof.
In order to solve the technical problem, the solution of the invention is as follows:
providing an anticorrosive wear-resistant bio-based composite coating, which consists of a component A and a component B;
the component A comprises the following components in parts by mass: 30-50 parts of cardanol-based epoxy resin, 11-25 parts of lignin-based epoxy resin, 5-24.9 parts of cardanol-based epoxy diluent, 0.15-1.94 parts of dispersing agent, 1.4-6.7 parts of modified potassium magnesium titanate, 0.01-0.08 part of defoaming agent, 0.005-0.1 part of flatting agent and 0.05-0.065 part of flash rust inhibitor;
the component B comprises the following components in parts by mass: 5-20 parts of cardanol modified amine epoxy curing agent, 3-8 parts of lignin phenolic aldehyde amine curing agent and 0.1-0.5 part of aminoethyl piperazine.
In the invention, the epoxy equivalent of the cardanol-based epoxy resin is 108-154g/Eq, and the epoxy equivalent of the lignin-based epoxy resin is 200-280 g/Eq.
In the invention, the cardanol-based epoxy diluent is cardanol-based glycidyl ether.
In the invention, the dispersant is one of tween 60 and polyvinyl alcohol 3000.
In the invention, the modified potassium magnesium titanate has a two-dimensional sheet structure, the sheet diameter size is 10-100 microns, the sheet thickness is 0.2-2 microns, the purity is more than or equal to 99.5%, and the surface is hydrophilic; one side edge of the sheet layer presents a saw-toothed structure, and the opposite side edge presents a relatively smooth structure.
In the invention, the modified potassium magnesium titanate is prepared by the following method:
(1) preparing potassium magnesium titanate by a molten salt method, wherein the sintering temperature is 760-970 ℃, and the sintering time is 2-3 h;
(2) respectively weighing potassium magnesium titanate and ethanol aqueous solution, and placing the potassium magnesium titanate in the ethanol aqueous solution to ensure that the solid content of the potassium magnesium titanate is 10-50 wt%; wherein the ratio of ethanol to water in the ethanol water solution is 9:1-1: 8.5; then adding 0.5-10wt% of silane coupling agent, and obtaining mixed liquor A after magnetic stirring;
(3) adding acetic acid into the mixed solution A to adjust the pH value to 4-9, and performing ultrasonic hydrolysis and mechanical stirring at the speed of 500-;
(4) placing the mixed solution B in an oil bath kettle at 250 ℃, stirring, evaporating to dryness, and centrifugally washing with deionized water to remove residual acetic acid; and then placing the mixture in a drying oven for drying to obtain the modified potassium magnesium titanate.
In the invention, the defoaming agent is one or a mixture of several of organosilicon defoaming agents, polyether defoaming agents and polyether modified polysiloxane defoaming agents.
In the invention, the flatting agent is one or a mixture of acrylic, organosilicon and fluorocarbon flatting agents; the flash rust inhibitor is one or a mixture of sodium nitrite, sodium molybdate and strontium chromate emulsion.
The invention further provides a preparation method of the anticorrosive wear-resistant bio-based composite coating, which comprises the following steps:
(1) taking the raw material components according to the mass part relation;
(2) fully mixing the cardanol-based epoxy resin and the lignin-based epoxy resin, adding the cardanol-based epoxy diluent, and stirring for 0.5-1h in a dispersion machine at the speed of 1500-one 2300r/min to obtain a mixture C;
(3) adding a dispersing agent and modified potassium magnesium titanate into the mixture C under the stirring condition, and fully stirring for 10-20 min; sequentially adding a defoaming agent, a leveling agent and an anti-flash rust agent, and uniformly stirring to obtain a component A of the anti-corrosion wear-resistant bio-based composite coating for later use;
(4) and fully mixing the cardanol modified amine epoxy curing agent, the lignin phenol aldehyde amine curing agent and the aminoethyl piperazine to obtain a component B of the anticorrosive wear-resistant bio-based composite coating for later use.
The invention also provides a using method of the anti-corrosion wear-resistant bio-based composite coating, which comprises the following steps:
(1) before coating, taking the component A and the component B according to the mass ratio of 100: 40, mixing and uniformly stirring to obtain a mixed coating D;
(2) and (3) applying the mixed coating D on the surface to be constructed by adopting a brushing, spin coating or spraying mode, and curing for 24 hours at room temperature to obtain the anticorrosive wear-resistant bio-based composite coating.
Description of the inventive principles:
titanate has a structure of mixed metal oxide, has excellent mechanical property and electrical property, has adjustable morphology, and has very important application in the fields of chemical medium corrosion prevention, wear resistance, electronic industry and the like. Titanate is used as a filler, so that the defects in the bio-based coating can be obviously improved, and the mechanical property and the functionality of the bio-based coating are effectively improved.
Aiming at the problem that the existing bio-based coating has poor functions such as corrosion resistance, wear resistance and the like, the invention introduces titanate as a functional filler to prepare the high-performance bio-based composite coating with the functions of corrosion resistance and wear resistance.
Modified potassium magnesium titanate is used as a functional filler, and the modified surface group of the modified potassium magnesium titanate can generate chemical crosslinking reaction with a resin matrix to realize high bonding force with the resin matrix; secondly, the modified potassium magnesium titanate is large in sheet diameter and thin in thickness, meanwhile, one side edge of the sheet layer is of a sawtooth structure, and the opposite side edge of the sheet layer is of a smooth structure. When the two-dimensional potassium magnesium titanate is dispersed in liquid, the two sides of the edges of the sheet layers are under different interfacial tension effects, so that after the coating is finished and before the coating is completely cured, the two-dimensional sheet layers are further orderly arranged along the direction parallel to the coating by pushing the difference of the interfacial tension on the two sides of the edges of the sheet layers, and the corrosion resistance, the wear resistance and the impact resistance of the coating are further improved; thirdly, the modified potassium magnesium titanate has excellent mechanical properties such as wear resistance and hardness, and the wear resistance of the bio-based coating can be obviously improved. Therefore, the invention can obtain the corrosion-resistant and wear-resistant bio-based composite coating.
Compared with the prior art, the invention has the following advantages:
1. the bio-based composite coating has the performances of corrosion resistance, abrasion resistance, impact resistance and the like, and can be applied to the fields of building, ocean engineering, ocean ships, industrial corrosion resistance and the like; the protective effect can be provided for the parts which are easy to corrode and wear.
2. The bio-based composite coating can form a film on common substrates such as stainless steel, aluminum alloy, wood and the like, and has good adhesive force with the substrates;
3. the bio-based composite coating can be constructed by adopting the processes of brushing, spin coating, spraying and the like, and is simple and easy to construct;
4. the method has the advantages of simple process, low cost, environmental protection and no pollution, and is suitable for large-scale industrial production.
Detailed Description
The invention will be further described with reference to specific examples to better understand the invention.
Example 1
1. Placing 50 parts of cardanol-based epoxy resin and 11 parts of lignin-based epoxy resin in a container, fully mixing, adding 12 parts of cardanol-based epoxy diluent (cardanol-based glycidyl ether), and stirring for 0.5h at the speed of 1500r/min by using a high-speed dispersion machine to obtain a mixture C;
2. stirring the mixture C, gradually adding 1.94 parts of dispersing agent and 1.4 parts of modified potassium magnesium titanate, fully stirring for 10min after the addition is finished, then sequentially adding 0.01 part of defoaming agent, 0.1 part of flatting agent and 0.05 part of flash rust inhibitor, and uniformly stirring to obtain a component A of the anti-corrosion wear-resistant bio-based composite coating;
3. fully mixing 20 parts of cardanol modified amine epoxy curing agent, 3 parts of lignin phenol aldehyde amine curing agent and 0.5 part of aminoethyl piperazine to obtain a component B of the anticorrosive wear-resistant bio-based composite coating;
4. taking the component A and the component B according to the mass ratio of 100: 40, mixing and stirring the components for 10 minutes, then coating the mixture on the surface to be constructed, and curing the mixture for 24 hours at room temperature to obtain the anti-corrosion wear-resistant bio-based composite coating.
Wherein the epoxy equivalent of the cardanol-based epoxy resin is 108g/Eq, and the epoxy equivalent of the lignin-based epoxy resin is 200 g/Eq; the dispersant is Tween 60; the defoaming agent is an organic silicon defoaming agent; the flatting agent is an acrylic flatting agent; the flash rust inhibitor is sodium nitrite.
Effect verification: the average friction coefficient of the prepared coating is 0.812(GB 10006) by detection according to corresponding national standards or industry standards; the abrasion loss was 0.012mm3(GB/T1768); the adhesion is grade 3 (GB/T9286); the hardness is 2H (GB/T6739); the impact resistance is 30cm (GB/T1732); modulus of resistance of 107.5Ω·.52(ii) a In the salt spray test, the paint does not foam, discolor and fall off after 1000 hours.
Example 2
1. Placing 30 parts of cardanol-based epoxy resin and 25 parts of lignin-based epoxy resin in a container, fully mixing, adding 24.9 parts of cardanol-based epoxy diluent (cardanol-based glycidyl ether), and stirring for 1 hour at the speed of 2300r/min by using a high-speed dispersion machine to obtain a mixture C;
2. gradually adding 0.15 part of dispersing agent and 6.7 parts of modified potassium magnesium titanate while stirring the mixture C, fully stirring for 20min after the addition is finished, then sequentially adding 0.08 part of defoaming agent, 0.005 part of flatting agent and 0.065 part of flash rust inhibitor, and uniformly stirring to obtain the component A of the anti-corrosion wear-resistant bio-based composite coating
3. Fully mixing 5 parts of cardanol modified amine epoxy curing agent, 8 parts of lignin phenol aldehyde amine curing agent and 0.1 part of aminoethyl piperazine to obtain a component B of the anticorrosive wear-resistant bio-based composite coating;
4. taking the component A and the component B according to the mass ratio of 100: 40, mixing and stirring the components for 10 minutes, then coating the mixture on the surface to be constructed, and curing the mixture for 24 hours at room temperature to obtain the anti-corrosion wear-resistant bio-based composite coating.
Wherein the epoxy equivalent of the cardanol-based epoxy resin is 154g/Eq, and the epoxy equivalent of the lignin-based epoxy resin is 280 g/Eq; the dispersant is Tween 60; the defoaming agent is polyether modified polysiloxane defoaming agent; the flatting agent is a fluorocarbon flatting agent; the flash rust inhibitor is strontium chromate.
Effect verification: the average friction coefficient of the prepared coating is 0.612(GB 10006) by detection according to corresponding national standards or industry standards; the abrasion loss is 0.008mm3(GB/T1768); the adhesive force is grade 2 (GB/T9286); the hardness is 3H (GB/T6)739) (ii) a The impact resistance is 50cm (GB/T1732); modulus of resistance of 108.5Omega 5 mode2(ii) a In the salt spray test, the paint does not foam, discolor and fall off after 1000 hours.
Example 3
1. Placing 45 parts of cardanol-based epoxy resin and 22 parts of lignin-based epoxy resin into a container, fully mixing, adding 5 parts of cardanol-based epoxy diluent (cardanol-based glycidyl ether), and stirring for 0.75h at the speed of 1900r/min by using a high-speed dispersion machine to obtain a mixture C;
2. stirring the mixture C, gradually adding 1.4 parts of dispersing agent and 4.5 parts of modified potassium magnesium titanate, fully stirring for 15min after the addition is finished, then sequentially adding 0.05 part of defoaming agent, 0.05 part of flatting agent and 0.06 part of anti-flash rust agent, and uniformly stirring to obtain the component A of the anti-corrosion wear-resistant bio-based composite coating
3. Fully mixing 16.64 parts of cardanol modified amine epoxy curing agent, 5 parts of lignin phenol aldehyde amine curing agent and 0.3 part of aminoethyl piperazine to obtain a component B of the anticorrosive wear-resistant bio-based composite coating;
4. taking the component A and the component B according to the mass ratio of 100: 40, mixing and stirring the components for 10 minutes, then coating the mixture on the surface to be constructed, and curing the mixture for 24 hours at room temperature to obtain the anti-corrosion wear-resistant bio-based composite coating.
Wherein the epoxy equivalent of the cardanol-based epoxy resin is 131g/Eq, and the epoxy equivalent of the lignin-based epoxy resin is 240 g/Eq; the dispersant is polyvinyl alcohol 3000; the defoaming agent is polyether defoaming agent; the leveling agent is an organic silicon leveling agent. The flash rust inhibitor is sodium molybdate.
Effect verification: the average friction coefficient of the prepared coating is 0.692(GB 10006) by detection according to corresponding national standards or industry standards; the abrasion loss is 0.009mm3(GB/T1768); the adhesion is grade 3 (GB/T9286); the hardness is 2H (GB/T6739); the impact resistance is 45cm (GB/T1732); modulus of resistance of 108Omega. anti-modulus2(ii) a In the salt spray test, the paint does not foam, discolor and fall off after 1000 hours.
Comparative example 1
A commercial PBC biobased weight anticorrosive paint was prepared according to the same verification method as examples 1 to 3The performance parameters of the coating are as follows: the average friction coefficient of the coating is 0.579(GB 10006); the abrasion loss was 0.113mm3(GB/T1768); the adhesion is grade 3 (GB/T9286); the hardness is 1H (GB/T6739); the impact resistance is 20cm (GB/T1732); modulus of resistance of 107.5Omega. anti-modulus2(ii) a Foaming, discoloration and falling off after 1000h in the salt spray test.
Comparing the data of examples 1-3 of the present invention, it can be seen that the coatings of the present invention are far superior to existing bio-based coatings in terms of abrasion resistance and corrosion resistance.
Comparative example 2
Coatings prepared from a commercial SPEH-104 petroleum-based resin were tested in the same manner as in examples 1-3, and the coating performance parameters were as follows: the average friction coefficient of the coating is 0.469(GB 10006); the abrasion loss was 0.203mm3(GB/T1768); the adhesion is grade 3 (GB/T9286); the hardness is 1H (GB/T6739); the impact resistance is 27cm (GB/T1732); modulus of resistance of 107.5Omega. anti-modulus2(ii) a Foaming, discoloration and falling off after 1000h in the salt spray test.
As can be seen from the comparison of the data in examples 1-3 of the present invention, the coatings of the present invention are far superior to the coatings prepared from the prior petroleum-based resins in terms of abrasion resistance and corrosion resistance.
Claims (7)
1. The anticorrosive wear-resistant bio-based composite coating is characterized by comprising a component A and a component B;
the component A comprises the following components in parts by mass: 30-50 parts of cardanol-based epoxy resin, 11-25 parts of lignin-based epoxy resin, 5-24.9 parts of cardanol-based epoxy diluent, 0.15-1.94 parts of dispersing agent, 1.4-6.7 parts of modified potassium magnesium titanate, 0.01-0.08 part of defoaming agent, 0.005-0.1 part of flatting agent and 0.05-0.065 part of flash rust inhibitor;
the epoxy equivalent of the cardanol-based epoxy resin is 108-154g/Eq, and the epoxy equivalent of the lignin-based epoxy resin is 200-280 g/Eq;
the modified potassium magnesium titanate is prepared by the following method:
(1) preparing potassium magnesium titanate by molten salt method, sintering tempDegree of 760-oC, sintering for 2-3 h;
(2) respectively weighing potassium magnesium titanate and ethanol aqueous solution, and placing the potassium magnesium titanate in the ethanol aqueous solution to ensure that the solid content of the potassium magnesium titanate is 10-50 wt%; wherein the ratio of ethanol to water in the ethanol water solution is 9:1-1: 8.5; then adding 0.5-10wt% of silane coupling agent, and obtaining mixed liquor A after magnetic stirring;
(3) adding acetic acid into the mixed solution A to adjust the pH value to 4-9, and performing ultrasonic hydrolysis and mechanical stirring at the speed of 500-;
(4) placing the mixed solution B in 250oC, stirring and evaporating in an oil bath, and centrifugally washing with deionized water to remove residual acetic acid; then placing the mixture in a drying oven for drying to obtain modified potassium magnesium titanate;
the modified potassium magnesium titanate has a two-dimensional sheet structure, the size of the sheet diameter is 10-100 microns, the thickness of the sheet layer is 0.2-2 microns, the purity is more than or equal to 99.5%, and the surface is hydrophilic; one side edge of the sheet layer presents a saw-toothed structure, and the opposite side edge presents a relatively smooth structure;
the component B comprises the following components in parts by mass: 5-20 parts of cardanol modified amine epoxy curing agent, 3-8 parts of lignin phenolic aldehyde amine curing agent and 0.1-0.5 part of aminoethyl piperazine.
2. The anticorrosive abrasion-resistant bio-based composite coating according to claim 1, wherein the cardanol-based epoxy diluent is cardanol-based glycidyl ether.
3. The anticorrosive wear-resistant bio-based composite coating according to claim 1, wherein the dispersant is one of tween 60 and polyvinyl alcohol 3000.
4. The anticorrosive wear-resistant bio-based composite coating as claimed in claim 1, wherein the defoamer is one or a mixture of silicone defoamer, polyether defoamer and polyether modified polysiloxane defoamer.
5. The anti-corrosion wear-resistant bio-based composite coating as claimed in claim 1, wherein the leveling agent is one or a mixture of acrylic, silicone and fluorocarbon leveling agents; the flash rust inhibitor is one or a mixture of sodium nitrite, sodium molybdate and strontium chromate emulsion.
6. The preparation method of the corrosion-resistant wear-resistant bio-based composite coating as claimed in claim 1, characterized by comprising the following steps:
(1) taking the raw material components according to the mass part relation;
(2) fully mixing the cardanol-based epoxy resin and the lignin-based epoxy resin, adding the cardanol-based epoxy diluent, and stirring for 0.5-1h in a dispersion machine at the speed of 1500-one 2300r/min to obtain a mixture C;
(3) adding a dispersing agent and modified potassium magnesium titanate into the mixture C under the stirring condition, and fully stirring for 10-20 min; then adding a defoaming agent, a leveling agent and an anti-flash rust agent in sequence, and uniformly stirring to obtain a component A of the anti-corrosion wear-resistant bio-based composite coating for later use;
(4) and (3) fully mixing the cardanol modified amine epoxy curing agent, the lignin phenol aldehyde amine curing agent and the aminoethyl piperazine to obtain a component B of the anticorrosive wear-resistant bio-based composite coating for later use.
7. The use method of the corrosion-resistant and wear-resistant bio-based composite coating of claim 1, characterized by comprising the following steps:
(1) before coating, taking the component A and the component B according to the relation of 100: 40 by weight, mixing and uniformly stirring to obtain a mixed coating D;
(2) and (3) applying the mixed coating D on the surface to be constructed by adopting a brushing, spin coating or spraying mode, and curing for 24 hours at room temperature to obtain the anticorrosive wear-resistant bio-based composite coating.
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| CN112980289A (en) | 2021-06-18 |
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