CN110079189B - Epoxy resin coating and preparation method thereof - Google Patents
Epoxy resin coating and preparation method thereof Download PDFInfo
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- CN110079189B CN110079189B CN201910345624.XA CN201910345624A CN110079189B CN 110079189 B CN110079189 B CN 110079189B CN 201910345624 A CN201910345624 A CN 201910345624A CN 110079189 B CN110079189 B CN 110079189B
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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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- 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
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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
- C09D7/65—Additives macromolecular
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Epoxy Resins (AREA)
Abstract
The invention relates to an epoxy resin coating and a preparation method thereof. An epoxy resin coating is composed of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass: the modified epoxy resin part: 25-40 parts of flexible epoxy resin, 1-10 parts of polyether polyol, 0.1-5 parts of a first coupling agent, 1-5 parts of cage-structure elastomer powder, 0-50 parts of a first filler and 0.01-1 part of a defoaming agent; the modified curing agent part: 25-40 parts of compound polyamine, 0.01-2 parts of a second coupling agent, 1-5 parts of an accelerator, 0.01-50 parts of a second filler and 0.01-1 part of a defoaming agent. The epoxy resin coating has the technical effect of crack resistance when the steel plate is subjected to positive impact and reverse impact at normal temperature and low temperature. According to the preparation method of the epoxy resin coating, the modified epoxy resin part and the modified curing agent part are respectively prepared and then are uniformly mixed to obtain the epoxy resin coating.
Description
Technical Field
The invention relates to the field of protective materials for locomotives and vehicles, in particular to an epoxy resin coating and a preparation method thereof.
Background
In the manufacturing industry of modern mechanical equipment, the use of paint as external surface protection and decoration is an indispensable measure. In the process of manufacturing railway locomotives, transportation equipment, locomotives and engineering vehicles, various coatings are used in a large amount in the process of coating and protecting the outer metal surface, and the environment outside the coatings is closely related to weather and working conditions and needs to resist corrosion. This places high demands on the resistance of the coating.
The existing epoxy resin system coating is widely applied, but the main defect of the epoxy resin is brittleness, and in the field of vehicle manufacturing, in order to enhance the protection of a metal surface layer, the coating is required to be capable of keeping crack damage without being subjected to positive impact and reverse impact under different environmental conditions. The existing product can meet the requirements at high temperature, but can not meet the requirements at normal temperature and lower temperature.
Disclosure of Invention
The invention provides an epoxy resin coating and a preparation method thereof, aiming at realizing that the epoxy resin coating can bear positive impact and reverse impact at normal temperature and low temperature under the condition of bearing the high-temperature impact resistance requirement when being coated on a steel plate.
An epoxy resin coating is composed of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass:
the modified epoxy resin part:
the modified curing agent part:
preferably, the flexible epoxy resin is a mixture of two or more of bisphenol A epoxy resin E20, E12, cardanol modified epoxy resin, 1, 6-hexanediamine tetraglycidyl ether and tetrahydrophthalic acid diglycidyl ester.
Preferably, the polyether polyol is polyether diol with a molecular weight of 3000-6000 and/or polyether triol with a molecular weight of 3000-6000.
Preferably, the first coupling agent or the second coupling agent is two or more of gamma-glycidoxypropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltriethoxysilane, and gamma-aminopropyltrimethoxysilane.
Preferably, the microstructure of the cage-shaped elastomer powder is composed of a cage-shaped polyhedral structure formed by crosslinking elastic chain segments and active terminal groups grafted on the surface of the cage-shaped polyhedral structure; the cage-shaped polyhedral structure is a longitude and latitude grid with hollow modeling; the active end group mainly comprises an epoxy group and/or a hydroxyl group; the elastomeric segments are predominantly different combinations of two or more of continuous silicone linkages, polyether linkages, polyester linkages and polyamide linkages.
Preferably, the polyamine is one or more of cardanol modified alicyclic amine, long-chain polyamide, 4-diaminodiphenylmethane and 4, 4-diaminodicyclohexylmethane.
Preferably, the accelerator is one or more of 2,4, 6-tris- (dimethylaminomethyl) phenol, 2-ethyl-4-methylimidazole and 2-methylimidazole.
Preferably, the first filler or the second filler is one or more of a silicon dioxide powder, a titanium dioxide powder, a calcium carbonate powder, a calcium sulfate powder, a silicon dioxide whisker, a titanium dioxide whisker, a calcium carbonate whisker and a calcium sulfate whisker.
The invention also provides a preparation method of the epoxy resin coating, which comprises the steps of preparing a modified epoxy resin part and a modified curing agent part respectively, and then uniformly mixing the modified epoxy resin part and the modified curing agent part to obtain the epoxy resin coating;
the modified epoxy resin part is prepared by the following steps:
step one, mixing and melting epoxy resin, a first coupling agent and polyether polyol, and stirring for 30-60 minutes;
step two, adding cage-structured elastomer powder into the mixture obtained in the step one, and stirring for 10-100 minutes;
step three, adding a first filler into the mixture obtained in the step two, and stirring for 30-120 minutes;
step four, adding a defoaming agent into the mixture obtained in the step three, and stirring for 30-60 minutes;
sixthly, stirring for 30-120 minutes at 50-80 ℃, and performing vacuum degassing to obtain the modified epoxy resin part;
the preparation steps of the modified curing agent part are as follows:
step one, mixing and stirring the compound polyamine, the second coupling agent and the accelerator for 30-60 minutes;
step two, adding a second filler into the mixture obtained in the step one, and stirring for 30-60 minutes;
step three, adding a defoaming agent into the mixture obtained in the step two, and stirring for 30-60 minutes;
and step four, stirring the mixture obtained in the step three for 30-120 minutes at 50-80 ℃, and performing vacuum degassing to obtain the modified curing agent part.
Compared with the prior art, the invention has the advantages that: the cage-structured elastomer powder with efficient toughening effect and the polyether polyol capable of increasing flexibility and cold resistance are added into the coating matrix epoxy resin, and the epoxy resin coating is coated on the steel plate under the synergistic effect of the cage-structured elastomer and the polyether polyol, so that the technical effect of crack resistance of the steel plate under normal temperature and low temperature when the steel plate is subjected to positive impact and reverse impact is ensured under the conditions of high-temperature impact resistance and high-slow adhesion requirements of the steel plate.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to make the aforementioned objects, features and advantages of the invention more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example one
An epoxy resin coating is composed of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass:
the modified epoxy resin part:
32 kg of flexible epoxy resin;
(wherein the mass ratio of the E-12 epoxy resin to the 1, 6-hexanediaminetetraglycidyl ether is 1: 4)
The modified curing agent part:
36 kg of complex polyamine;
(wherein the mass ratio of the cardanol modified alicyclic amine to the 4, 4-diaminodiphenylmethane is 95: 5)
The embodiment also comprises a preparation method of the epoxy resin coating, wherein the modified epoxy resin part and the modified curing agent part are respectively prepared and then are uniformly mixed to obtain the epoxy resin coating;
the modified epoxy resin part is prepared by the following steps:
1. accurately weighing each group of raw materials for later use;
2. adding weighed epoxy resin, a first coupling agent and polyether polyol into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer after all the epoxy resin, the first coupling agent and the polyether polyol are melted, and stopping stirring after 45 minutes;
3. adding weighed cage-shaped structure elastomer powder, starting the stirrer, and stopping stirring after 55 minutes;
4. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 100 minutes;
5. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
6. rapidly stirring for 30 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum under the condition that the vacuum degree is between-0.05 and-0.01 MPa;
7. discharging and checking.
The preparation steps of the modified curing agent part are as follows:
1. accurately weighing each group of raw materials for later use;
2. adding weighed compound polyamine, a second coupling agent and an accelerator into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer, and stopping stirring after 45 minutes;
3. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 45 minutes;
4. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
5. rapidly stirring for 60 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum under the condition that the vacuum degree is between-0.05 and-0.01 MPa;
6. discharging and checking.
In this example, the modified epoxy resin part and the modified curing agent part prepared as described above were mixed in a mass ratio of 1: 1, and the epoxy resin coating is obtained, and the impact resistance of the coating after coating and curing is shown in table 1.
Example two
An epoxy resin coating is composed of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass:
the modified epoxy resin part:
31 kg of flexible epoxy resin;
(wherein the mass ratio of the E-20 epoxy resin to the 1, 6-hexanediaminetetraglycidyl ether is 1: 5)
The modified curing agent part:
35 kg of composite polyamine;
(wherein the mass ratio of the cardanol modified alicyclic amine to the 4, 4-diaminodicyclohexyl methane is 7: 3)
The embodiment also comprises a preparation method of the epoxy resin coating, wherein the modified epoxy resin part and the modified curing agent part are respectively prepared and then are uniformly mixed to obtain the epoxy resin coating;
the modified epoxy resin part is prepared by the following steps:
1. accurately weighing each group of raw materials for later use;
2. adding weighed epoxy resin, a first coupling agent and polyether polyol into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer after all the epoxy resin, the first coupling agent and the polyether polyol are melted, and stopping stirring after 45 minutes;
3. adding weighed cage-shaped structure elastomer powder, starting the stirrer, and stopping stirring after 55 minutes;
4. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 100 minutes;
5. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
6. rapidly stirring for 30 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum under the condition that the vacuum degree is between-0.05 and-0.01 MPa;
7. discharging and checking.
The preparation steps of the modified curing agent part are as follows:
1. accurately weighing each group of raw materials for later use;
2. adding weighed compound polyamine, a second coupling agent and an accelerator into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer, and stopping stirring after 45 minutes;
3. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 45 minutes;
4. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
5. rapidly stirring for 60 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum, wherein the vacuum degree is between-0.05 and-0.01 MPa;
6. discharging and checking.
In this example, the prepared modified epoxy resin part and modified curing agent part are mixed according to a mass ratio of 1: 1, uniformly mixing to obtain the epoxy resin coating, wherein the impact resistance of the coating after coating and curing is shown in table 1.
EXAMPLE III
An epoxy resin coating is composed of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass:
the modified epoxy resin part:
32.5 kg of flexible epoxy resin;
(wherein the mass ratio of E12, cardanol modified epoxy resin and 1, 6-hexanediamine tetraglycidyl ether is 1: 2: 4)
The modified curing agent part:
35.1 kg of polyamine complex;
(wherein the mass ratio of the cardanol modified alicyclic amine to the 4, 4-diaminodiphenylmethane is 85: 15)
The embodiment also comprises a preparation method of the epoxy resin coating, wherein the modified epoxy resin part and the modified curing agent part are respectively prepared and then are uniformly mixed to obtain the epoxy resin coating;
the modified epoxy resin part is prepared by the following steps:
1. accurately weighing each group of raw materials for later use;
2. adding weighed epoxy resin, a first coupling agent and polyether polyol into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer after all the epoxy resin, the first coupling agent and the polyether polyol are melted, and stopping stirring after 45 minutes;
3. adding weighed cage-shaped structure elastomer powder, starting the stirrer, and stopping stirring after 55 minutes;
4. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 100 minutes;
5. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
6. rapidly stirring for 30 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum under the condition that the vacuum degree is between-0.05 and-0.01 MPa;
7. discharging and checking.
The preparation steps of the modified curing agent part are as follows:
1. accurately weighing each group of raw materials for later use;
2. adding weighed compound polyamine, a second coupling agent and an accelerator into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer, and stopping stirring after 45 minutes;
3. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 45 minutes;
4. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
5. rapidly stirring for 60 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum under the condition that the vacuum degree is between-0.05 and-0.01 MPa;
6. discharging and checking.
In this example, the prepared modified epoxy resin part and modified curing agent part are mixed according to a mass ratio of 1: 1, uniformly mixing to obtain the epoxy resin coating, wherein the impact resistance of the coating after coating and curing is shown in table 1.
Example four
An epoxy resin coating is composed of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass:
the modified epoxy resin part:
32 kg of flexible epoxy resin;
(wherein the mass ratio of the E-12 epoxy resin to the 1, 6-hexanediaminetetraglycidyl ether is 1: 4)
The modified curing agent part:
36 kg of complex polyamine;
(wherein the mass ratio of the cardanol modified alicyclic amine to the 4, 4-diaminodiphenylmethane is 95: 5)
The embodiment also comprises a preparation method of the epoxy resin coating, wherein the modified epoxy resin part and the modified curing agent part are respectively prepared and then are uniformly mixed to obtain the epoxy resin coating;
the modified epoxy resin part is prepared by the following steps:
1. accurately weighing each group of raw materials for later use;
2. adding weighed epoxy resin, a first coupling agent and polyether polyol into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer after all the epoxy resin, the first coupling agent and the polyether polyol are melted, and stopping stirring after 45 minutes;
3. adding weighed cage-shaped structure elastomer powder, starting the stirrer, and stopping stirring after 55 minutes;
4. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 100 minutes;
5. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
6. rapidly stirring for 30 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum, wherein the vacuum degree is between-0.05 and-0.01 MPa;
7. discharging and checking.
The preparation steps of the modified curing agent part are as follows:
1. accurately weighing each group of raw materials for later use;
2. adding weighed compound polyamine, a second coupling agent and an accelerator into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer, and stopping stirring after 45 minutes;
3. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 45 minutes;
4. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
5. rapidly stirring for 60 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum, wherein the vacuum degree is between-0.05 and-0.01 MPa;
6. discharging and checking.
In this embodiment, a modified epoxy resin part and a modified curing agent part are mixed in a mass ratio of 1: 1, and the shock resistance of the coating after coating and curing is shown in table 1.
EXAMPLE five
An epoxy resin coating is composed of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass:
the modified epoxy resin part:
33 kg of flexible epoxy resin;
(wherein the mass ratio of the tetrahydrophthalic acid diglycidyl ester to the 1, 6-hexanediamine tetraglycidyl ether is 1: 4)
(wherein the mass ratio of the titanium dioxide crystal whisker to the silicon dioxide powder is 1: 9)
0.25 kg of simethicone;
the modified curing agent part:
36 kg of complex polyamine;
(wherein the mass ratio of the cardanol modified alicyclic amine to the long-chain polyimide is 1: 1)
The embodiment also comprises a preparation method of the epoxy resin coating, wherein the modified epoxy resin part and the modified curing agent part are respectively prepared and then are uniformly mixed to obtain the epoxy resin coating;
the modified epoxy resin part is prepared by the following steps:
1. accurately weighing each group of raw materials for later use;
2. adding weighed epoxy resin, a first coupling agent and polyether polyol into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer after all the epoxy resin, the first coupling agent and the polyether polyol are melted, and stopping stirring after 45 minutes;
3. adding weighed cage-shaped structure elastomer powder, starting the stirrer, and stopping stirring after 55 minutes;
4. adding the weighed first filler, starting the stirrer, and stopping stirring after 100 minutes;
5. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 30 minutes;
6. rapidly stirring for 30 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum, wherein the vacuum degree is between-0.05 and-0.01 MPa;
7. discharging and checking.
The preparation steps of the modified curing agent part are as follows:
1. accurately weighing each group of raw materials for later use;
2. adding weighed compound polyamine, a second coupling agent and an accelerator into a reaction kettle at the temperature of 50-70 ℃, starting a stirrer, and stopping stirring after 45 minutes;
3. adding weighed silicon dioxide powder, starting the stirrer, and stopping stirring after 55 minutes;
4. adding the weighed defoaming agent, starting the stirrer, and stopping stirring after 40 minutes;
5. rapidly stirring for 80 minutes at the temperature of between 60 and 70 ℃, and degassing in vacuum, wherein the vacuum degree is between-0.05 and-0.01 MPa;
6. discharging and checking.
In the embodiment, the epoxy resin part and the curing agent part are mixed according to the mass ratio of 1: 1, and the epoxy resin coating is obtained, and the impact resistance of the coating after coating and curing is shown in table 1.
TABLE 1 impact resistance test results of the coating after coating and curing
| At 50 ℃ of reactionPunching machine | Recoil at 20 deg.C | 20 ℃ positive impact | Back flushing at-30 deg.C | Positive impact at-30 deg.C | |
| Example one | Without cracks | Without cracks | Without cracks | Without cracks | Without cracks |
| Example two | Without cracks | Without cracks | Without cracks | Without cracks | Without cracks |
| EXAMPLE III | Without cracks | Without cracks | Without cracks | Without cracks | Without cracks |
| Example four | Without cracks | Without cracks | Without cracks | Without cracks | Without cracks |
| EXAMPLE five | Without cracks | Without cracks | Without cracks | Without cracks | Without cracks |
| Existing sample | Without cracks | Without cracks | Without cracks | Micro-cracks | Has cracks |
As can be seen from Table 1, the epoxy resin coating provided by the invention has good anti-recoil and anti-normal-recoil capabilities at high temperature, normal temperature and low temperature.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Claims (9)
1. The epoxy resin coating is characterized by consisting of a modified epoxy resin part and a modified curing agent part, and comprises the following components in parts by mass:
the modified epoxy resin part:
25-40 parts of flexible epoxy resin,
1-10 parts of polyether polyol,
0.1 to 5 parts of a first coupling agent,
1-5 parts of cage-structured elastomer powder,
0.01 to 50 parts of a first filler,
0.01-1 part of defoaming agent;
the modified curing agent part:
25-40 parts of compound polyamine,
0.01 to 2 parts of a second coupling agent,
0.01 to 5 parts of an accelerator,
0.01 to 50 parts of a second filler,
0.01-1 part of defoaming agent;
wherein the microstructure of the cage-shaped structure elastomer powder is composed of a cage-shaped polyhedral structure formed by crosslinking elastic chain segments and active terminal groups grafted on the surface of the cage-shaped polyhedral structure; the cage-shaped polyhedral structure is a longitude and latitude grid with hollow modeling; the active end group mainly comprises an epoxy group and/or a hydroxyl group; the elastomeric segments are predominantly different combinations of two or more of continuous silicone linkages, polyether linkages, polyester linkages and polyamide linkages.
2. The epoxy resin coating according to claim 1, wherein the flexible epoxy resin is a mixture of two or more of bisphenol a epoxy resins E20, E12, cardanol-modified epoxy resins, 1, 6-hexanediaminetetraglycidyl ether and tetrahydrophthalic acid bisglycidyl ester.
3. The epoxy resin coating of claim 1, wherein the polyether polyol is a polyether diol having a molecular weight in the range of 3000 to 6000 and/or a polyether triol having a molecular weight in the range of 3000 to 6000.
4. The epoxy resin coating of claim 1, wherein the first coupling agent or the second coupling agent is one or more of gamma-glycidoxypropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltriethoxysilane, and gamma-aminopropyltrimethoxysilane.
5. The epoxy resin coating according to claim 1, wherein the complex polyamine is at least two of cardanol-modified alicyclic amine, long-chain polyamide, 4-diaminodiphenylmethane, and 4, 4-diaminodicyclohexylmethane.
6. The epoxy coating of claim 1, wherein the accelerator is one or more of 2,4, 6-tris- (dimethylaminomethyl) phenol, 2-ethyl-4-methylimidazole, and 2-methylimidazole.
7. The epoxy resin coating of claim 1, wherein the defoamer is one or more of isooctanol, dimethicone, and gasoline.
8. The epoxy resin coating of claim 1, wherein the first filler or the second filler is one or more of a silicon dioxide powder, a titanium dioxide powder, a calcium carbonate powder, a calcium sulfate powder, a silicon dioxide whisker, a titanium dioxide whisker, a calcium carbonate whisker, and a calcium sulfate whisker.
9. A method for preparing the epoxy resin paint according to any one of claims 1 to 8, characterized in that the epoxy resin paint is obtained by mixing the modified epoxy resin part and the modified curing agent part uniformly after preparing the modified epoxy resin part and the modified curing agent part respectively;
the modified epoxy resin part is prepared by the following steps:
step one, mixing and melting epoxy resin, a first coupling agent and polyether polyol, and stirring for 30-60 minutes;
step two, adding cage-structured elastomer powder into the mixture obtained in the step one, and stirring for 10-100 minutes;
step three, adding a first filler into the mixture obtained in the step two, and stirring for 30-120 minutes;
step four, adding a defoaming agent into the mixture obtained in the step three, and stirring for 30-60 minutes;
sixthly, stirring for 30-120 minutes at 50-80 ℃, and performing vacuum degassing to obtain the modified epoxy resin part;
the preparation steps of the modified curing agent part are as follows:
step one, mixing and stirring the compound polyamine, the second coupling agent and the accelerator for 30-60 minutes;
step two, adding a second filler into the mixture obtained in the step one, and stirring for 30-60 minutes;
step three, adding a defoaming agent into the mixture obtained in the step two, and stirring for 30-60 minutes;
and step four, stirring the mixture obtained in the step three at 50-80 ℃ for 30-120 minutes, and performing vacuum degassing to obtain the modified curing agent part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910345624.XA CN110079189B (en) | 2019-04-26 | 2019-04-26 | Epoxy resin coating and preparation method thereof |
Applications Claiming Priority (1)
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| CN111647322B (en) * | 2020-06-27 | 2022-07-22 | 德阳聪源光电科技股份有限公司 | Conductive ink composition for preparing flexible heating film |
| CN113105813B (en) * | 2021-05-27 | 2022-07-15 | 上海京球新材料科技有限公司 | Special waterproof and compression-resistant coating for back surface of underground building, and preparation method and application method thereof |
| CN115286984B (en) * | 2022-04-08 | 2023-08-11 | 水乐涂新材料(广州)有限公司 | Decorative coating for underwater environment and preparation method thereof |
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| US20170088696A1 (en) * | 2015-09-29 | 2017-03-30 | Baker Hughes Incorporated | Rubber reinforced with fillers dispersed in functionalized silsesquioxanes |
| CN106433397B (en) * | 2016-09-20 | 2018-06-26 | 蓝色海洋（天津）工程技术有限公司 | A kind of low temperature resistant solvent-free thick-film type corrosion-resistant epoxy paint |
| CN106589354B (en) * | 2016-11-14 | 2019-03-05 | 万华化学集团股份有限公司 | A kind of epoxy resin toughener and preparation method thereof and a kind of composition epoxy resin |
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