CN116751499A - Nano silicon nitride modified high-temperature-resistant solvent-free epoxy wear-resistant acid-resistant coating - Google Patents
Nano silicon nitride modified high-temperature-resistant solvent-free epoxy wear-resistant acid-resistant coating Download PDFInfo
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- CN116751499A CN116751499A CN202310982697.6A CN202310982697A CN116751499A CN 116751499 A CN116751499 A CN 116751499A CN 202310982697 A CN202310982697 A CN 202310982697A CN 116751499 A CN116751499 A CN 116751499A
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- 239000005543 nano-size silicon particle Substances 0.000 title claims abstract description 67
- 239000004593 Epoxy Substances 0.000 title claims abstract description 54
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 54
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000002253 acid Substances 0.000 title claims abstract description 37
- 239000011248 coating agent Substances 0.000 title claims abstract description 25
- 238000000576 coating method Methods 0.000 title claims abstract description 25
- -1 modified alicyclic amine Chemical class 0.000 claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 244000226021 Anacardium occidentale Species 0.000 claims abstract description 37
- 235000020226 cashew nut Nutrition 0.000 claims abstract description 37
- 229920005989 resin Polymers 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 37
- 239000003208 petroleum Substances 0.000 claims abstract description 36
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000011521 glass Substances 0.000 claims abstract description 27
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 17
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 15
- 239000003085 diluting agent Substances 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims abstract description 14
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 239000003973 paint Substances 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 32
- 238000005303 weighing Methods 0.000 claims description 24
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 claims description 23
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 239000001257 hydrogen Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 230000035939 shock Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000012767 functional filler Substances 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- MJIHNNLFOKEZEW-UHFFFAOYSA-N lansoprazole Chemical group CC1=C(OCC(F)(F)F)C=CN=C1CS(=O)C1=NC2=CC=CC=C2N1 MJIHNNLFOKEZEW-UHFFFAOYSA-N 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
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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
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant 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
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant coating, which adopts the technical scheme that the coating comprises a component A and a component B; the mass ratio range of the component A to the component B is 5:1 to 10:1, a step of; the component A comprises the following raw materials in parts by weight: 20-40 parts of epoxy resin; 0.3 to 1.0 part of dispersing agent; 3-8 parts of petroleum resin; 4-10 parts of cashew nut shell oil epoxy reactive diluent; 0.1 to 0.5 part of defoaming agent; 0.5 to 3.0 portions of carbon black; 0.1 to 0.6 portion of nano silicon dioxide; 5-15 parts of nano silicon nitride; 20-40 parts of precipitated barium sulfate; 10-30 parts of glass flakes; the component B comprises the following raw materials in parts by mass: 30-60 parts of modified alicyclic amine curing agent; 40-70 parts of cashew phenol aldehyde amine curing agent, and the cashew phenol aldehyde amine curing agent has the advantages of good toughness, adhesion to a base material and thermal shock resistance.
Description
Technical Field
The invention relates to the field of solvent-free epoxy paint, in particular to a nano silicon nitride modified high-temperature-resistant solvent-free epoxy wear-resistant acid-resistant paint.
Background
In the wet desulfurization system of thermal power generation, because of the existence of high-content acid gas in flue gas, the flue gas has serious corrosiveness in condensed mixed liquid after saturated absorption by a wet method, meanwhile, the temperature difference between the front section flue gas inlet and the rear section flue gas inlet is large, the temperature of the front section flue gas inlet is up to 160-180 ℃, and the temperature of the treated flue gas is reduced to 45-55 ℃. The paint film is required to have higher temperature resistance and cold and hot impact resistance, and the traditional vinyl glass flake clay is easy to crack and peel under the cold and hot impact condition, so that protection failure is caused. Because the flue gas contains more granular substances, the coating is easy to lose efficacy due to the scouring of the flue gas, and therefore, the paint film needs to have good wear resistance.
The solvent type desulfurization and inner wall removal device anticorrosive paint on the market at present has a better protection effect on the system, but the product is a solvent type product, has higher VOC content and lower one-time coating thickness. In order to better meet the requirements of the market on low VOC content and environmental protection, the solvent-free high temperature resistant, super wear resistant and acid corrosion resistant epoxy paint is developed for many years.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant paint which has the advantages of good toughness, adhesion to a base material and thermal shock resistance.
The technical aim of the invention is realized by the following technical scheme:
nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint:
comprises a component A and a component B;
the mass ratio range of the component A to the component B is 5:1 to 10:1, a step of;
the component A comprises the following raw materials in parts by weight:
20-40 parts of epoxy resin;
0.3 to 1.0 part of dispersing agent;
3-8 parts of petroleum resin;
4-10 parts of cashew nut shell oil epoxy reactive diluent;
0.1 to 0.5 part of defoaming agent;
0.5 to 3.0 portions of carbon black;
0.1 to 0.6 portion of nano silicon dioxide;
5-15 parts of nano silicon nitride;
20-40 parts of precipitated barium sulfate;
10-30 parts of glass flakes;
the component B comprises the following raw materials in parts by mass:
30-60 parts of modified alicyclic amine curing agent;
40-70 parts of cashew phenol aldehyde amine curing agent.
Further, the epoxy resin comprises the following raw materials in parts by weight: 10-20 parts of liquid epoxy resin and 10-20 parts of phenolic epoxy resin.
Further, the liquid epoxy resin has an epoxy equivalent of 130-150 g/eq and a viscosity of 800-1100 cps.
Further, the epoxy equivalent of the phenolic epoxy resin is 160-180 g/eq, and the viscosity is 6000-7100 cps.
Further, the petroleum resin is low-viscosity petroleum resin, the hydroxyl content of the petroleum resin is 1.7-2.2%, and the viscosity is 300-400 mPa.s.
Furthermore, the particle size of the nano silicon nitride is 500-800 nm, the specific surface area is 50-70 m < 2 >/g, and the purity is more than 99.9%.
Further, the method comprises the steps of: the fineness of the glass flakes is 300-500 meshes.
Further, the active hydrogen equivalent of the modified alicyclic amine curing agent is 90-120, and the viscosity is 300-500 mPa.s.
Further, the active hydrogen equivalent weight of the cashew phenol aldehyde amine curing agent is 70-110, and the viscosity is 2000-3000 Pa.s.
A preparation method of a nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant coating comprises the following steps:
step S1, preparing a component A, which comprises the following steps:
step one: weighing liquid epoxy resin, phenolic epoxy resin, dispersing agent, low-viscosity petroleum resin and cashew nut shell oil epoxy reactive diluent, putting into a dispersing kettle, and uniformly dispersing at a rotating speed of 300-500 RPM;
step two: adding a defoaming agent, carbon black and nano silicon dioxide, uniformly dispersing at the rotating speed of 500-800 PRM, and grinding to the fineness of below 30 um;
and step three: stirring the ground slurry uniformly at a rotating speed of 500-800 RPM, sequentially adding nano silicon nitride and precipitated barium sulfate, stirring at a high speed of 100-1200 RPM to a fineness of less than 50um, adding glass flakes, and stirring uniformly at a rotating speed of 500-800 RPM until no obvious particles exist, thus obtaining a component A;
step S2, preparing a component B, which comprises the following steps:
step one: weighing a modified alicyclic amine curing agent and a cashew phenol aldehyde amine curing agent, then putting the modified alicyclic amine curing agent and the cashew phenol aldehyde amine curing agent into a stirring kettle, setting the rotating speed of the stirring kettle at 500-800 RPM, and stirring for 20-60 min;
step S3, the mass ratio of the component A to the component B is 5:1 to 10:1, mixing to obtain a target product.
By adopting the technical scheme.
In summary, the invention has the following beneficial effects:
1. the low-viscosity liquid epoxy resin and the phenolic epoxy resin are mixed and matched to construct a resin multi-element matrix, the heat resistance and the dielectric resistance of the matrix are improved, the liquid petroleum resin and the cashew nut shell oil epoxy reactive diluent are introduced into the matrix for dilution, the viscosity of a coating system is reduced, the toughness and the thermal shock resistance of the system are improved, the service life of the coating in extreme environment is further prolonged, and the acid resistance, the wear resistance and the thermal shock resistance of the whole paint film are improved.
2. By introducing functional fillers such as nano silicon dioxide, nano silicon nitride, precipitated barium sulfate, glass flakes and the like, the functional fillers form a three-dimensional interpenetrating network structure in a matrix, so that the conditions of breakage and the like are not easy to occur, and the toughness and the adhesive force to a base material of the coating are greatly improved.
3. The selected functional filler is inert, has good stability, and has better acid and alkali resistant medium performance, so that the coating can be finished under the condition that the coating is easier to achieve, wherein the used silicon nitride, glass flakes and the like have good hardness, are combined in a network structure of a matrix, are favorable for ensuring the integrity of the matrix structure under the action of external force, and have high heat conductivity, and the heat shock conduction of the silicon nitride is uniform, so that the risk of failure and cracking of the local overheat paint film is reduced.
4. The sheet structure of the glass flakes forms an overlapped lamellar structure in the paint film, improves the sealing property of the paint film, and prevents various media from penetrating, thereby improving the acid and alkali resistance of the paint film.
5. The nano silicon nitride has stable chemical property, except that hydrofluoric acid can corrode the nano silicon nitride, all the rest inorganic acid can not corrode the structure of the nano silicon nitride, and the nano silicon nitride has good structural stability and thermal shock resistance, so that a paint film is not easy to crack.
6. The modified alicyclic amine curing agent is low-viscosity alicyclic amine with active hydrogen equivalent weight of 90-120 and viscosity of 300-500 mPa.s; the cashew phenol aldehyde amine curing agent has the active hydrogen equivalent of 70-110 and viscosity of 2000-3000 Pa.s, has a long fatty chain structure, can improve the crosslinking density and rigidity of a paint film, and improves the temperature resistance and acid and alkali medium resistance of the paint film.
7. The barium sulfate has strong inertia, good acid resistance and alkali resistance, and larger specific gravity, and can be filled in the coating more without rapidly improving the viscosity of the coating. The sheet structure of the glass flakes forms an overlapped lamellar structure in the paint film, improves the sealing property of the paint film, and prevents various media from penetrating, thereby improving the acid and alkali resistance of the paint film.
8. The preparation conditions are easy to achieve, the preparation process is simple, and the preparation method is suitable for large-scale industrial preparation.
Drawings
FIG. 1 is a schematic illustration of the steps of a nano silicon nitride modified high temperature resistant solvent free epoxy abrasion resistant acid resistant coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the solution according to the present invention will be given with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the invention.
Example 1:
a nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant coating comprises a component A and a component B; the mass ratio of the component A to the component B is 8:1.
wherein the component A comprises the following raw materials in parts by mass:
10 parts of liquid epoxy resin, wherein the epoxy equivalent of the liquid epoxy resin is 130-150 g/eq, and the viscosity of the liquid epoxy resin is 800-1100 cps;
20 parts of phenolic epoxy resin, wherein the epoxy equivalent of the phenolic epoxy resin is 160-180 g/eq, and the viscosity is 6000-7100 cps;
0.5 part of dispersing agent, wherein the specific dispersing agent is BYK2155;
3 parts of petroleum resin, wherein the petroleum resin is low-viscosity petroleum resin, the hydroxyl content of the petroleum resin is 1.7-2.2%, and the viscosity of the petroleum resin is 300-400 mPa.s;
10 parts of cashew nut shell oil epoxy reactive diluent;
0.1 part of defoaming agent, wherein the specific defoaming agent is BYK-A530;
2.0 parts of carbon black;
0.5 parts of nano silicon dioxide;
5 parts of nano silicon nitride, wherein the particle size of the nano silicon nitride is 500-800 nm, the specific surface area is 50-70 m2/g, and the purity is more than 99.9%;
40 parts of precipitated barium sulfate;
10 parts of glass flakes, wherein the fineness of the glass flakes is 300-500 meshes.
The component B comprises the following raw materials in parts by mass:
30 parts of modified alicyclic amine curing agent, 90-120 active hydrogen equivalent of the modified alicyclic amine curing agent and 300-500 mPa.s of viscosity. The method comprises the steps of carrying out a first treatment on the surface of the
70 parts of cashew phenol aldehyde amine curing agent, wherein the cashew phenol aldehyde amine curing agent has an active hydrogen equivalent of 70-110 and a viscosity of 2000-3000 Pa.s.
The preparation method, as shown in figure 1, comprises the following steps:
step S1, preparing a component A, which comprises the following steps:
step one: weighing 10 parts of liquid epoxy resin, 20 parts of phenolic epoxy resin, 0.5 part of dispersing agent, 3 parts of low-viscosity petroleum resin and 10 parts of cashew nut shell oil epoxy reactive diluent, sequentially adding into a dispersing kettle, and uniformly dispersing at a rotating speed of 300-500 RPM.
Step two: accurately weighing, adding 0.1 part of defoaming agent, 2 parts of carbon black and 0.5 part of nano silicon dioxide, uniformly dispersing at the rotating speed of 500-800 PRM, and grinding to the fineness of below 30 um.
And step three: stirring the ground slurry uniformly at a rotating speed of 500-800 RPM, sequentially weighing, adding 5 parts of nano silicon nitride and 40 parts of precipitated barium sulfate, stirring at a high speed of 100-1200 RPM to a fineness of less than 50um, weighing and adding 10 parts of glass flakes, and stirring uniformly at a rotating speed of 500-800 RPM until no obvious particles exist, thus obtaining the component A.
Step S2, preparing a component B, which comprises the following steps:
step one: starting the stirring kettle, setting the rotating speed at 500-800 RPM, sequentially weighing 30 parts of the modified alicyclic amine curing agent and 70 parts of the cashew phenol aldehyde amine curing agent, and stirring for 20min to obtain the component B.
And step S3, uniformly mixing the component A and the component B according to the mass part ratio of 8:1 when in use to obtain the nano silicon nitride modified high-temperature-resistant solvent-free epoxy super wear-resistant acid corrosion-resistant coating.
Example 2:
a nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant coating comprises a component A and a component B; the mass ratio of the component A to the component B is 5:1.
wherein the component A comprises the following raw materials in parts by mass:
20 parts of liquid epoxy resin, wherein the epoxy equivalent of the liquid epoxy resin is 130-150 g/eq, and the viscosity of the liquid epoxy resin is 800-1100 cps;
20 parts of phenolic epoxy resin, wherein the epoxy equivalent of the phenolic epoxy resin is 160-180 g/eq, and the viscosity is 6000-7100 cps;
0.3 part of dispersing agent, wherein the specific dispersing agent is BYK161;
8 parts of petroleum resin, wherein the petroleum resin is low-viscosity petroleum resin, the hydroxyl content of the petroleum resin is 1.7-2.2%, and the viscosity of the petroleum resin is 300-400 mPa.s;
4 parts of cashew nut shell oil epoxy reactive diluent;
0.3 part of defoaming agent, wherein the specific defoaming agent is BYK066N;
1.0 parts of carbon black;
0.3 parts of nano silicon dioxide;
15 parts of nano silicon nitride, wherein the particle size of the nano silicon nitride is 500-800 nm, the specific surface area is 50-70 m < 2 >/g, and the purity is more than 99.9%;
16 parts of precipitated barium sulfate;
15 parts of glass flakes, wherein the fineness of the glass flakes is 300-500 meshes.
The component B comprises the following raw materials in parts by mass:
50 parts of modified alicyclic amine curing agent, 90-120 active hydrogen equivalent of the modified alicyclic amine curing agent and 300-500 mPa.s of viscosity. The method comprises the steps of carrying out a first treatment on the surface of the
50 parts of cashew phenol aldehyde amine curing agent, wherein the cashew phenol aldehyde amine curing agent has an active hydrogen equivalent of 70-110 and a viscosity of 2000-3000 Pa.s.
The preparation method comprises the following steps:
step S1, preparing a component A, which comprises the following steps:
step one: weighing 20 parts of liquid epoxy resin, 20 parts of phenolic epoxy resin, 0.3 part of dispersing agent, 8 parts of low-viscosity petroleum resin and 4 parts of cashew nut shell oil epoxy reactive diluent, sequentially adding into a dispersing kettle, and uniformly dispersing at a rotating speed of 300-500 RPM.
Step two: accurately weighing, adding 0.3 part of defoaming agent, 1 part of carbon black and 0.3 part of nano silicon dioxide, uniformly dispersing at the rotating speed of 500-800 PRM, and grinding to the fineness of below 30 um.
And step three: stirring the ground slurry uniformly at the rotating speed of 500-800 RPM, sequentially weighing and adding 15 parts of nano silicon nitride and 16 parts of precipitated barium sulfate, stirring at a high speed of 100-1200 RPM to a fineness of less than 50um, weighing and adding 15 parts of glass flakes, and stirring uniformly at the rotating speed of 500-800 RPM until no obvious particles exist, thus obtaining the component A.
Step S2, preparing a component B, which comprises the following steps:
step one: starting the stirring kettle, setting the rotating speed at 500-800 RPM, sequentially weighing 50 parts of the modified alicyclic amine curing agent and 50 parts of the cashew phenol aldehyde amine curing agent, and stirring for 40min to obtain the component B.
And step S3, uniformly mixing the component A and the component B according to the mass part ratio of 5:1 when in use to obtain the nano silicon nitride modified high-temperature-resistant solvent-free epoxy super wear-resistant acid corrosion-resistant coating.
Example 3:
a nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant coating comprises a component A and a component B; the mass ratio of the component A to the component B is 6:1.
wherein the component A comprises the following raw materials in parts by mass:
20 parts of liquid epoxy resin, wherein the epoxy equivalent of the liquid epoxy resin is 130-150 g/eq, and the viscosity of the liquid epoxy resin is 800-1100 cps;
10 parts of phenolic epoxy resin, wherein the epoxy equivalent of the phenolic epoxy resin is 160-180 g/eq, and the viscosity is 6000-7100 cps;
1 part of dispersing agent, wherein the specific dispersing agent isDispers 628；
5 parts of petroleum resin, wherein the petroleum resin is low-viscosity petroleum resin, the hydroxyl content of the petroleum resin is 1.7-2.2%, and the viscosity of the petroleum resin is 300-400 mPa.s;
7 parts of cashew nut shell oil epoxy reactive diluent;
0.5 part of defoaming agent, wherein the specific defoaming agent isFoamex N；
3.0 parts of carbon black;
0.1 part of nano silicon dioxide;
10 parts of nano silicon nitride, wherein the particle size of the nano silicon nitride is 500-800 nm, the specific surface area is 50-70 m2/g, and the purity is more than 99.9%;
20 parts of precipitated barium sulfate;
24 parts of glass flakes, wherein the fineness of the glass flakes is 300-500 meshes.
The component B comprises the following raw materials in parts by mass:
60 parts of modified alicyclic amine curing agent, 90-120 active hydrogen equivalent of the modified alicyclic amine curing agent and 300-500 mPa.s of viscosity. The method comprises the steps of carrying out a first treatment on the surface of the
40 parts of cashew phenol aldehyde amine curing agent, wherein the active hydrogen equivalent weight of the cashew phenol aldehyde amine curing agent is 70-110, and the viscosity is 2000-3000 Pa.s.
The preparation method comprises the following steps:
step S1, preparing a component A, which comprises the following steps:
step one: weighing 20 parts of liquid epoxy resin, 10 parts of phenolic epoxy resin, 1 part of dispersing agent, 5 parts of low-viscosity petroleum resin and 7 parts of cashew nut shell oil epoxy reactive diluent, sequentially adding into a dispersing kettle, and uniformly dispersing at a rotating speed of 300-500 RPM.
Step two: accurately weighing, adding 0.5 part of defoaming agent, 3 parts of carbon black and 0.1 part of nano silicon dioxide, uniformly dispersing at the rotating speed of 500-800 PRM, and grinding to the fineness of below 30 um.
And step three: stirring the ground slurry uniformly at a rotating speed of 500-800 RPM, sequentially weighing and adding 10 parts of nano silicon nitride, 20 parts of precipitated barium sulfate, stirring at a high speed of 100-1200 RPM to a fineness of less than 50um, weighing and adding 24 parts of glass flakes, and stirring uniformly at a rotating speed of 500-800 RPM until no obvious particles exist, thus obtaining the component A.
Step S2, preparing a component B, which comprises the following steps:
step one: starting the stirring kettle, setting the rotating speed at 500-800 RPM, sequentially weighing 60 parts of the modified alicyclic amine curing agent and 40 parts of the cashew phenol aldehyde amine curing agent, and stirring for 30min to obtain the component B.
And step S3, uniformly mixing the component A and the component B according to the mass part ratio of 6:1 when in use to obtain the nano silicon nitride modified high-temperature-resistant solvent-free epoxy super wear-resistant acid corrosion-resistant coating.
Example 4:
a nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant coating comprises a component A and a component B; the mass ratio of the component A to the component B is 10:1.
wherein the component A comprises the following raw materials in parts by mass:
10 parts of liquid epoxy resin, wherein the epoxy equivalent of the liquid epoxy resin is 130-150 g/eq, and the viscosity of the liquid epoxy resin is 800-1100 cps;
10 parts of phenolic epoxy resin, wherein the epoxy equivalent of the phenolic epoxy resin is 160-180 g/eq, and the viscosity is 6000-7100 cps;
0.5 part of dispersing agent, wherein the specific dispersing agent is EFKA4063;
6 parts of petroleum resin, wherein the petroleum resin is low-viscosity petroleum resin, the hydroxyl content of the petroleum resin is 1.7-2.2%, and the viscosity of the petroleum resin is 300-400 mPa.s;
10 parts of cashew nut shell oil epoxy reactive diluent;
0.2 part of defoaming agent, wherein the specific defoaming agent is BYK052N;
2.0 parts of carbon black;
0.2 parts of nano silicon dioxide;
8 parts of nano silicon nitride, wherein the particle size of the nano silicon nitride is 500-800 nm, the specific surface area is 50-70 m2/g, and the purity is more than 99.9%;
33 parts of precipitated barium sulfate;
20 parts of glass flakes, wherein the fineness of the glass flakes is 300-500 meshes.
The component B comprises the following raw materials in parts by mass:
45 parts of modified alicyclic amine curing agent, 90-120 active hydrogen equivalent of the modified alicyclic amine curing agent and 300-500 mPa.s of viscosity. The method comprises the steps of carrying out a first treatment on the surface of the
55 parts of cashew phenol aldehyde amine curing agent, wherein the active hydrogen equivalent weight of the cashew phenol aldehyde amine curing agent is 70-110, and the viscosity is 2000-3000 Pa.s.
The preparation method comprises the following steps:
step S1, preparing a component A, which comprises the following steps:
step one: weighing 10 parts of liquid epoxy resin, 10 parts of phenolic epoxy resin, 0.5 part of dispersing agent, 6 parts of low-viscosity petroleum resin and 10 parts of cashew nut shell oil epoxy reactive diluent, sequentially adding into a dispersing kettle, and uniformly dispersing at a rotating speed of 300-500 RPM.
Step two: accurately weighing, adding 0.2 part of defoaming agent, 2 parts of carbon black and 0.2 part of nano silicon dioxide, uniformly dispersing at the rotating speed of 500-800 PRM, and grinding to the fineness of below 30 um.
And step three: stirring the ground slurry uniformly at the rotating speed of 500-800 RPM, sequentially weighing, adding 8 parts of nano silicon nitride and 33 parts of precipitated barium sulfate, stirring at a high speed of 100-1200 RPM to a fineness of less than 50um, weighing, adding 20 parts of glass flakes, and stirring uniformly at the rotating speed of 500-800 RPM until no obvious particles exist, thus obtaining the component A.
Step S2, preparing a component B, which comprises the following steps:
step one: starting the stirring kettle, setting the rotating speed at 500-800 RPM, sequentially weighing 45 parts of the modified alicyclic amine curing agent and 55 parts of the cashew phenol aldehyde amine curing agent, and stirring for 60 minutes to obtain the component B.
And step S3, uniformly mixing the component A and the component B according to the mass part ratio of 10:1 when in use to obtain the nano silicon nitride modified high-temperature-resistant solvent-free epoxy super wear-resistant acid corrosion-resistant coating.
Comparative example 1:
the specific model of the commercial vinyl glass flake clay is zoton chemflake special.
Comparative example 2:
the specific model of the solvent-based paint for the inner wall of the Tu Dun desulfurization and denitrification device is T-1.
And (3) detecting the performance of the paint:
experimental group: example 1, example 2, example 3, example 4, comparative example 1, comparative example 2.
Detailed performance test results:
TABLE 1
Conclusion of experiment:
as can be seen from the above examples and comparative examples, the nano silicon nitride modified solvent-free epoxy coating of the invention forms a three-dimensional interpenetrating network structure in an epoxy resin system by introducing nano silicon nitride modified functional fillers such as glass flakes, precipitated barium sulfate, nano silicon dioxide and the like, and various functional fillers have the characteristics of strong inertia, high hardness, good thermal conductivity, low friction coefficient and good self-lubricating property, so that a paint film has good high temperature resistance, rapid cooling and rapid heating thermal shock resistance, good wear resistance and excellent strong acid resistance. Meanwhile, the solvent-free product has the characteristics of easiness in construction, high film forming thickness in one-time construction, extremely low VOC content and the like, is environment-friendly compared with the solvent-free product, and solves the problems of troublesome construction of glass flake cement and easiness in cracking due to rapid cooling and rapid heating. Can be used for a long time under the condition of 150-180 ℃ and can resist the high temperature of 250 ℃ for a short time. Meanwhile, the paint has the advantages of high temperature resistance, strong acid resistance, wear resistance, environmental protection and low VOC. Has good effect on corrosion resistance of inner walls of a thermal power generation long desulfurization and denitrification system, a chimney and the like. It is also suitable for the environments such as coal chemical industry, sewage treatment device and the like which need to endure high temperature, strong acid medium and the like.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A nano silicon nitride modified high-temperature resistant solvent-free epoxy wear-resistant acid-resistant paint is characterized in that,
comprises a component A and a component B;
the mass ratio range of the component A to the component B is 5:1 to 10:1, a step of;
the component A comprises the following raw materials in parts by weight:
20-40 parts of epoxy resin;
0.3 to 1.0 part of dispersing agent;
3-8 parts of petroleum resin;
4-10 parts of cashew nut shell oil epoxy reactive diluent;
0.1 to 0.5 part of defoaming agent;
0.5 to 3.0 portions of carbon black;
0.1 to 0.6 portion of nano silicon dioxide;
5-15 parts of nano silicon nitride;
20-40 parts of precipitated barium sulfate;
10-30 parts of glass flakes;
the component B comprises the following raw materials in parts by mass:
30-60 parts of modified alicyclic amine curing agent;
40-70 parts of cashew phenol aldehyde amine curing agent.
2. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in claim 1, wherein: the epoxy resin comprises the following raw materials in parts by weight: 10-20 parts of liquid epoxy resin and 10-20 parts of phenolic epoxy resin.
3. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in claim 2, wherein: the epoxy equivalent of the liquid epoxy resin is 130-150 g/eq and the viscosity is 800-1100 cps.
4. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in claim 2, wherein: the epoxy equivalent of the phenolic epoxy resin is 160-180 g/eq, and the viscosity is 6000-7100 cps.
5. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in claim 1, wherein: the petroleum resin is low-viscosity petroleum resin, the hydroxyl content of the petroleum resin is 1.7-2.2%, and the viscosity is 300-400 mPa.s.
6. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in claim 1, wherein: the particle size of the nano silicon nitride is 500-800 nm, the specific surface area is 50-70 m < 2 >/g, and the purity is more than 99.9%.
7. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in claim 1, wherein: the fineness of the glass flakes is 300-500 meshes.
8. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in claim 1, wherein: the active hydrogen equivalent of the modified alicyclic amine curing agent is 90-120, and the viscosity is 300-500 mPa.s.
9. The nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant coating according to claim 1, wherein the coating is characterized in that: the active hydrogen equivalent weight of the cashew phenol aldehyde amine curing agent is 70-110, and the viscosity is 2000-3000 Pa.s.
10. A method for preparing the nano silicon nitride modified high temperature resistant solvent-free epoxy wear resistant acid resistant paint as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
step S1, preparing a component A, which comprises the following steps:
step one: weighing liquid epoxy resin, phenolic epoxy resin, dispersing agent, low-viscosity petroleum resin and cashew nut shell oil epoxy reactive diluent, putting into a dispersing kettle, and uniformly dispersing at a rotating speed of 300-500 RPM;
step two: adding a defoaming agent, carbon black and nano silicon dioxide, uniformly dispersing at the rotating speed of 500-800 PRM, and grinding to the fineness of below 30 um;
and step three: stirring the ground slurry uniformly at a rotating speed of 500-800 RPM, sequentially adding nano silicon nitride and precipitated barium sulfate, stirring at a high speed of 100-1200 RPM to a fineness of less than 50um, adding glass flakes, and stirring uniformly at a rotating speed of 500-800 RPM until no obvious particles exist, thus obtaining a component A;
step S2, preparing a component B, which comprises the following steps:
step one: weighing a modified alicyclic amine curing agent and a cashew phenol aldehyde amine curing agent, then putting the modified alicyclic amine curing agent and the cashew phenol aldehyde amine curing agent into a stirring kettle, setting the rotating speed of the stirring kettle at 500-800 RPM, and stirring for 20-60 min;
step S3, the mass ratio of the component A to the component B is 5:1 to 10:1, mixing to obtain a target product.
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