CN110922889A - Wear-resistant anticorrosive paint for inner wall of heat distribution pipeline and preparation method thereof - Google Patents
Wear-resistant anticorrosive paint for inner wall of heat distribution pipeline 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5026—Amines cycloaliphatic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
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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
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1675—Polyorganosiloxane-containing compositions
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- 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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- 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
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- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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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
- C08K3/32—Phosphorus-containing compounds
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- C08K2003/328—Phosphates of heavy metals
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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Abstract
The invention discloses a wear-resistant anticorrosive coating for the inner wall of a heat distribution pipeline, which comprises a component A and a component B, wherein the component A comprises the following components: phenolic epoxy resin, organic silicon epoxy hybrid resin, methyl isobutyl ketone, inorganic filler and auxiliary agent; the B component comprises modified alicyclic amine and amino alkoxy silane; wherein the inorganic filler comprises modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide, carbon fiber and titanium dioxide. The invention also discloses a preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline. The wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline has high temperature resistance and high pressure resistance, protects the pipeline from being corroded by hot water medium, has good wear resistance and stain resistance, reduces the friction damage of scrap iron welding slag and other impurities mixed in the pipeline during hot water conveying to the pipeline by coating the coating, and greatly prolongs the service life of the heat distribution pipeline.
Description
Technical Field
The invention relates to the technical field of industrial coatings, in particular to a wear-resistant anticorrosive coating for the inner wall of a heating pipeline for conveying high-temperature and high-pressure water in a municipal heating system.
Background
With the rapid development of national economic society in recent years, the urbanization of China is promoted year by year, and the popularization rate and development scale of heat supply in winter in northern cities are on the rising trend. In the heating period, hot water steam generated by the thermal power plant is conveyed to a city heating pipe network formed by users in the city through a heating pipeline, so that the heating pipeline plays an important role in a heating system, and the quality of the heating pipeline can directly influence the heating quality of the whole heating system. Because the hot water of heating power pipeline transmission has higher temperature, can accelerate the inside corruption with other heat supply original paper of pipeline, weld the repaired mouth because of pipeline and pipeline in addition bury ground the construction process in the pipeline, can produce a large amount of iron fillings welding slag. The welding slag and other impurities can cause friction damage to the pipeline in the process of conveying hot water, accelerate the corrosion of the pipeline, influence the normal operation of a heating system, and cause the problem of pipe explosion of a thermal pipeline in serious cases, thereby endangering the life and property safety of people in cities, causing adverse social influence and great economic loss, and having extremely harsh repair conditions and very expensive cost.
Therefore, it is highly desirable to provide a wear-resistant and corrosion-resistant coating for the inner wall of a thermal pipeline for transporting high-pressure hot water medium to solve the above problems.
Disclosure of Invention
The invention aims to provide a wear-resistant anticorrosive coating for the inner wall of a heat distribution pipeline capable of conveying a high-pressure hot water medium, which not only has high temperature resistance and high pressure resistance and protects the pipeline from being corroded by the hot water medium, but also has good wear resistance and stain resistance.
The invention provides a wear-resistant anticorrosive coating for the inner wall of a heat distribution pipeline, which comprises a component A and a component B, wherein the component A comprises the following components: phenolic epoxy resin, organic silicon epoxy hybrid resin, methyl isobutyl ketone, inorganic filler and auxiliary agent; the B component comprises modified alicyclic amine and amino alkoxy silane;
wherein the inorganic filler comprises modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide, carbon fiber and titanium dioxide.
Further, the auxiliary agent comprises: a polymer defoaming agent without organic silicon, a high molecular copolymer dispersing agent containing pigment affinity groups, hydrophobic fumed silica and a castor oil modified derivative rheological additive.
Furthermore, the epoxy equivalent of the novolac epoxy resin is 168-178 g/eq.
Further, the epoxy equivalent of the organic silicon epoxy hybrid resin is 445-455 g/eq.
Further, the epoxy equivalent of the organic silicon epoxy hybrid resin is 450 g/eq.
Further, the active hydrogen equivalent of the modified alicyclic amine is 112-118.
Further, the modified alicyclic amine has an active hydrogen equivalent of 115.
Further, the aminoalkoxysilanes possess the dual-functional reactivity of silane-primary amino groups and hydrolyzable ethoxysilyl groups.
Further, the component A comprises the following components in percentage by weight:
further, the component B comprises the following components in percentage by weight:
72.5-75.5% of modified alicyclic amine;
24.5 to 27.5% of aminoalkoxysilane.
Further, the coating is a two-component package, and during construction, the weight ratio of the component A to the component B is 100: 18 to 27.5, respectively.
The invention also provides a preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline, which comprises the following steps:
the preparation steps of the component A are as follows:
mixing phenolic epoxy resin and organic silicon epoxy hybrid resin, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, continuously stirring and dispersing, adding hydrophobic fumed silica, increasing the rotating speed, dispersing at a high speed, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide and titanium dioxide under medium-speed stirring, increasing the rotating speed, continuously stirring, reducing the rotating speed when the temperature reaches 40 ℃, adding a castor oil modified derivative rheological aid to obtain a mixture, and increasing the rotating speed to enable the temperature of the mixture to reach 45-50 ℃ and keep the temperature unchanged; then standing the mixture, cooling to room temperature, and grinding until the fineness is less than or equal to 60 mu m; adding carbon fiber and methyl isobutyl ketone into the ground mixture in sequence, and dispersing uniformly to obtain a component A;
the preparation steps of the component B are as follows:
and dispersing the modified alicyclic amine and the amino alkoxy silane at medium speed in a clean container without water and alcohol solvent residues, and uniformly dispersing to obtain the component B.
Further, the preparation steps of the component A are as follows:
mixing phenolic epoxy resin and organic silicon epoxy hybrid resin, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, continuously stirring and dispersing for 10-15 minutes, adding hydrophobic fumed silica, increasing the rotating speed, dispersing for 12-20 minutes at a high speed, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide and titanium dioxide under medium-speed stirring, increasing the rotating speed, continuously stirring, reducing the rotating speed when the temperature reaches 40 ℃, adding a castor oil modified derivative rheological aid to obtain a mixture, increasing the rotating speed to enable the temperature of the mixture to reach 45-50 ℃, and preserving the heat for 35-50 minutes; then standing the mixture, cooling to room temperature, and grinding until the fineness is less than or equal to 60 mu m; and (3) sequentially adding carbon fiber and methyl isobutyl ketone into the ground mixture, and uniformly dispersing at a high speed to obtain the component A.
Further, in the step of preparing the component A, the raw materials for preparing the component A specifically comprise: phenolic epoxy resin, organic silicon epoxy hybrid resin, methyl isobutyl ketone, modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide, carbon fiber, titanium dioxide, an antifoaming agent, a dispersing agent, hydrophobic fumed silica and a castor oil modified derivative rheological additive.
Further, the defoaming agent is a silicone-free polymer defoaming agent.
Further, the dispersing agent is a pigment affinity group-containing high-molecular copolymer dispersing agent.
Further, the preparation steps of the component B are as follows:
and dispersing the modified alicyclic amine and the amino alkoxy silane in a clean and anhydrous scuff cylinder without residual alcohol solvent at medium speed for 12-20 minutes, and uniformly dispersing to obtain the component B.
Further, the preparation raw materials of the component B comprise: modified cycloaliphatic amines and aminoalkoxysilanes.
Further, the coating of the present invention requires mixing the a component with the B component at the time of use.
Further, in the preparation step of the component A, the preparation raw materials comprise the following components in percentage by weight:
further, in the preparation step of the component B, the preparation raw materials comprise the following components in percentage by weight:
72.5-75.5% of modified alicyclic amine;
24.5 to 27.5% of aminoalkoxysilane.
In the present invention, the aforementioned aminoalkoxysilane-reactive dual property may be used as a crosslinking agent or an adhesion promoter for the coating material of the present invention.
In the embodiment of the invention, the novolac epoxy resin is south Asia epoxy resin NPPN-631.
In the embodiment of the invention, the organic silicon epoxy hybrid resin is SILIKOPEN EF resin which wins and creates special chemistry (Shanghai) limited.
In the embodiment of the invention, the modified alicyclic amine is Ancamine2143 curing agent of air chemistry company.
In the examples of the present invention, the aminoalkoxysilane is Dynasylan AMEO, a product of special chemistry (shanghai) ltd.
In the examples of the present invention, the raw materials such as methyl isobutyl ketone, inorganic filler and auxiliary agent are all commercially available raw materials.
In the invention, when the wear-resistant anticorrosive paint for the inner wall of the heat distribution pipeline is coated on the inner wall of the heat distribution pipeline, the surface of a base material needs to be subjected to oil removal, rust removal, thermal cleaning and sand blasting cleaning, and the appearance of the wear-resistant anticorrosive paint does not have the defects of oxide scale, oil stain, water, cracks, burrs, spiral scratches and the like.
In the invention, the wear-resistant anticorrosive paint for the inner wall of the heat distribution pipeline can be sprayed in a single way or multiple ways. The coating thickness of the single-pass wet film of the coating can reach 650 mu m, and the sagging phenomenon can not be generated.
In the present invention, if a plurality of coating passes are performed, the minimum coating interval is 4 hours and the maximum coating interval is 14 days at the normal temperature of 25 ℃. The final coating of the invention was fully cured in 7 days.
In the preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline, the technical scheme of dispersion is determined according to the adopted materials and the dispersion device.
The invention has the beneficial effects that:
the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline has high temperature resistance and high pressure resistance, protects the pipeline from being corroded by hot water medium, and has good wear resistance. In addition, the coating formed by coating the paint has small surface tension, a contact angle theta between the coating and water is more than 90 degrees, the cleaning is easy, and the stain resistance is good.
The component A is prepared from high-heat-resistance phenolic resin and organic silicon epoxy hybrid resin, and the antirust filler and the wear-resistant filler are reasonably matched with the resin to generate a good synergistic effect, so that the product not only has heat resistance, but also has excellent corrosion resistance and wear resistance. The curing agent used in the component B of the present invention is a modified alicyclic amine and aminoalkoxysilane which are excellent in heat resistance. The bi-component coating has the characteristics of high temperature resistance, high pressure resistance, wear resistance and the like, and is suitable for protecting the inner wall of an urban heat supply pipeline for conveying hot water.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a wear-resistant anticorrosive coating for the inner wall of a heat distribution pipeline, which comprises a component A and a component B, wherein the component A comprises: phenolic epoxy resin, organic silicon epoxy hybrid resin, methyl isobutyl ketone, inorganic filler and auxiliary agent; the B component comprises modified alicyclic amine and amino alkoxy silane; wherein the inorganic filler comprises modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide, carbon fiber and titanium dioxide.
The auxiliary agent comprises a polymer defoaming agent without organic silicon, a high molecular copolymer dispersing agent containing pigment affinity groups, hydrophobic fumed silica and a castor oil modified derivative rheological auxiliary agent.
The epoxy equivalent of the novolac epoxy resin is 168-178 g/eq. The epoxy equivalent of the organic silicon epoxy hybrid resin is 445-455 g/eq. The active hydrogen equivalent of the modified alicyclic amine is 112-118. The aminoalkoxysilanes have a bifunctional reactivity with a silane-primary amino group and a hydrolyzable ethoxysilyl group.
The component A comprises the following components in percentage by weight:
the component B comprises the following components in percentage by weight:
72.5-75.5% of modified alicyclic amine;
24.5 to 27.5% of aminoalkoxysilane.
The coating is a two-component package, and during construction, the weight ratio of the component A to the component B is 100: 18 to 27.5, respectively.
The preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline comprises a preparation step of the component A and a preparation step of the component B.
The preparation steps of the component A are as follows:
mixing phenolic epoxy resin and organic silicon epoxy hybrid resin according to the raw materials and the weight percentage thereof, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, continuously stirring and dispersing for 10-15 minutes, then adding hydrophobic fumed silica, increasing the rotating speed of a dispersing machine, after dispersing for 12-20 minutes at a high speed, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide and titanium dioxide under medium-speed stirring, increasing the rotating speed of the dispersing machine, continuously stirring, reducing the rotating speed when the temperature reaches 40 ℃, adding a castor oil modified derivative rheological additive to obtain a mixture, increasing the rotating speed of the dispersing machine to enable the temperature of the mixture to reach 45-50 ℃, and preserving the heat for 35-50 minutes; then standing the mixture, cooling to room temperature, and grinding to fineness of less than or equal to 60 μm by using a horizontal sand mill; and adding carbon fiber and methyl isobutyl ketone into the ground mixture in sequence, and uniformly dispersing at a high speed to obtain the component A of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline.
The preparation steps of the component B are as follows:
according to the raw materials and the weight percentage thereof, the modified alicyclic amine and the amino alkoxy silane are dispersed at a medium speed for 12-20 minutes in a clean and anhydrous pull cylinder without residual alcohol solvent, and the component B of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline is obtained after uniform dispersion.
Example 2
The embodiment provides a wear-resistant anticorrosive coating for the inner wall of a heat distribution pipeline, which comprises a component A and a component B, wherein the component A of the coating comprises the following raw materials in percentage by weight as shown in the following table 1:
TABLE 1
The component B of the coating is prepared from the following raw materials in percentage by weight as shown in Table 2:
TABLE 2
| Raw material of component B | Weight percent (%) |
| Modified cycloaliphatic amines | 72.5 |
| Aminoalkoxysilanes | 27.5 |
During the coating construction, the component A and the component B in the embodiment are mixed according to the ratio of 100: 23.5, mixing.
The preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline comprises a preparation step of the component A and a preparation step of the component B.
The preparation steps of the component A are as follows:
mixing phenolic epoxy resin and organic silicon epoxy hybrid resin according to the raw materials and the weight percentage, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, continuously stirring and dispersing for 10-15 minutes, adding hydrophobic fumed silica, increasing the rotating speed of a dispersing machine, dispersing for 12-20 minutes at a high speed, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide and titanium dioxide under medium-speed stirring, increasing the rotating speed of the dispersing machine, continuously stirring, reducing the rotating speed when the temperature reaches 40 ℃, adding a castor oil modified derivative rheological additive to obtain a mixture, increasing the rotating speed of the dispersing machine to enable the temperature of the mixture to reach 45-50 ℃, and preserving the heat for 35-50 minutes; then standing the mixture, cooling to room temperature, and grinding to fineness of less than or equal to 60 μm by using a horizontal sand mill; and adding carbon fiber and methyl isobutyl ketone into the ground mixture in sequence, and uniformly dispersing at a high speed to obtain the component A of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline.
The preparation steps of the component B are as follows:
according to the raw materials and the weight percentage, the modified alicyclic amine and the amino alkoxy silane are dispersed in a clean and anhydrous scuff cylinder without residual alcohol solvent for 12-20 minutes at a medium speed, and the component B of the wear-resistant anticorrosive coating for the inner wall of the thermal pipeline is obtained after uniform dispersion.
Example 3
The embodiment provides a wear-resistant anticorrosive coating for the inner wall of a heat distribution pipeline, which comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight as shown in Table 3:
TABLE 3
The component B of the coating is prepared from the following raw materials in percentage by weight as shown in Table 4:
TABLE 4
| Raw material of component B | Weight percent (%) |
| Modified cycloaliphatic amines | 74.5 |
| Aminoalkoxysilanes | 25.5 |
During the coating construction, the component A and the component B in the embodiment are mixed according to the ratio of 100: 18, and mixing the components in a weight ratio.
The preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline comprises a preparation step of the component A and a preparation step of the component B.
The preparation steps of the component A are as follows:
mixing phenolic epoxy resin and organic silicon epoxy hybrid resin according to the raw materials and the weight percentage, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, continuously stirring and dispersing for 10-15 minutes, adding hydrophobic fumed silica, increasing the rotating speed of a dispersing machine, dispersing for 12-20 minutes at a high speed, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide and titanium dioxide under medium-speed stirring, increasing the rotating speed of the dispersing machine, continuously stirring, reducing the rotating speed when the temperature reaches 40 ℃, adding a castor oil modified derivative rheological additive to obtain a mixture, increasing the rotating speed of the dispersing machine to enable the temperature of the mixture to reach 45-50 ℃, and preserving the heat for 35-50 minutes; then standing the mixture, cooling to room temperature, and grinding to fineness of less than or equal to 60 μm by using a horizontal sand mill; and adding carbon fiber and methyl isobutyl ketone into the ground mixture in sequence, and uniformly dispersing at a high speed to obtain the component A of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline.
The preparation steps of the component B are as follows:
according to the raw materials and the weight percentage, the modified alicyclic amine and the amino alkoxy silane are dispersed in a clean and anhydrous scuff cylinder without residual alcohol solvent for 12-20 minutes at a medium speed, and the component B of the wear-resistant anticorrosive coating for the inner wall of the thermal pipeline is obtained after uniform dispersion.
Example 4
The embodiment provides a wear-resistant anticorrosive coating for the inner wall of a heat distribution pipeline, which comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight as shown in the following table 5:
TABLE 5
| Raw material of component A | Weight percent (%) |
| Novolac epoxy resin | 30 |
| Organic silicon epoxy hybrid resin | 20 |
| Silicone-free polymeric defoamers | 0.5 |
| Pigment affinity group-containing macromolecular copolymer dispersant | 0.5 |
| Hydrophobic fumed silica | 0.5 |
| Modified zinc phosphate | 3.0 |
| Aluminium triphosphate | 4.0 |
| Mica powder | 13.7 |
| Silicon carbide | 15 |
| Carbon fiber | 2 |
| Titanium white powder | 5.0 |
| Castor oil modified derivative rheological aid | 0.8 |
| Methyl isobutyl ketone | 5 |
The component B of the coating is prepared from the following raw materials in percentage by weight as shown in Table 6:
TABLE 6
During the coating construction, the component A and the component B in the embodiment are mixed according to the ratio of 100: 27.5 weight ratio.
The preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline comprises a preparation step of the component A and a preparation step of the component B.
The preparation steps of the component A are as follows:
mixing phenolic epoxy resin and organic silicon epoxy hybrid resin according to the raw materials and the weight percentage, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, continuously stirring and dispersing for 10 minutes, adding hydrophobic fumed silica, increasing the rotating speed of a dispersion machine, dispersing for 15 minutes at a high speed, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide and titanium dioxide under medium-speed stirring, increasing the rotating speed of the dispersion machine, continuously stirring, reducing the rotating speed when the temperature reaches 40 ℃, adding a castor oil modified derivative rheological additive to obtain a mixture, increasing the rotating speed of the dispersion machine to enable the temperature of the mixture to reach 45-50 ℃, and preserving the heat for 40 minutes; then standing the mixture, cooling to room temperature, and grinding to fineness of less than or equal to 60 μm by using a horizontal sand mill; and adding carbon fiber and methyl isobutyl ketone into the ground mixture in sequence, and uniformly dispersing at a high speed to obtain the component A of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline.
The preparation steps of the component B are as follows:
according to the raw materials and the weight percentage, the modified alicyclic amine and the amino alkoxy silane are dispersed for 15 minutes in a clean and anhydrous scuff cylinder without residual alcohol solvent, and the component B of the wear-resistant anticorrosive coating for the inner wall of the thermal pipeline is obtained after uniform dispersion.
The coating formed by coating the paint in the embodiment of the invention has small surface tension and a contact angle theta of more than 90 degrees with water. Therefore, the coating coated by the coating is easy to clean and has good stain resistance.
Test example 1
In the test, the anticorrosive performance of the coating in the embodiments 2 to 4 of the invention is detected, the coating in the embodiments is respectively coated on the inner wall of the heat distribution pipeline to form a coating, a medium is introduced to detect the anticorrosive performance of the coating, the coating is observed, and the test result is recorded as follows.
1) The test method comprises the following steps: deionized water with the temperature of 150 ℃ and the pressure of 10MPa is fed into the thermal pipeline coated with the coating of the invention, and the time is 168 hours. And (3) test results: the coating of the coating can withstand the harsh conditions of 150 ℃ and 10MPa within 168 hours, and the coating does not have the phenomena of foaming, cracking and falling off.
2) The test method comprises the following steps: the heating pipeline coated with the coating of the invention is filled with boiled water with the temperature of 95 ℃ for 1000 h. And (3) test results: the coating of the paint of the invention does not generate the phenomena of bubbling, cracking and shedding after being placed in boiled water at 95 ℃ for 1000 h.
3) The test method comprises the following steps: the thermal tube coated with the coating according to the invention is passed through an oil bath at 150 ℃ and immersed in the oil bath for 1000 h. And (3) test results: the coating of the paint of the invention does not generate the phenomena of foaming, cracking and shedding after being placed in an oil bath at 150 ℃ for 1000 h.
4) The test method comprises the following steps: the thermal pipeline coated with the coating of the invention is respectively filled with 10% sulfuric acid, 5% sodium hydroxide and 3% sodium chloride solution, and is soaked for 30 days at room temperature and for 1000 h. And (3) test results: the coating of the coating is respectively soaked in 10% sulfuric acid, 5% sodium hydroxide and 3% sodium chloride solution at room temperature for 30 days, and the coating does not have the phenomena of foaming, cracking and falling off.
5) The test method comprises the following steps: crude oil, gasoline and diesel oil are respectively led into the thermal pipeline coated with the coating of the invention and soaked for 30 days at normal temperature. And (3) test results: the coating of the invention is respectively soaked in crude oil, gasoline, diesel oil and other oil products for 30 days at normal temperature, and the coating does not have the phenomena of foaming, cracking and falling off.
Test example 2
This test will examine the wear resistance of the coatings of examples 2 to 4 of the invention: the coating of the embodiment is respectively coated on the inner wall of the heat distribution pipeline to form a coating, the wear resistance of the coating is detected by a rotary rubber grinding wheel method, and the test result is recorded as follows.
The test method comprises the following steps: the wear resistance of the coating is detected by respectively adopting two types of rubber grinding wheels, namely CS-17 and CS-10, of the American Taber Industries company under the conditions that the maximum load is 1kg and the set rotating speed is 1000r, and test data are recorded, wherein the average mass loss data of the coating are shown in the following table 7:
TABLE 7
| Condition | CS-17(1kg，1000r) | CS-10(1kg，1000r) |
| Average loss of mass (mg) | 30～40 | 10～20 |
As can be seen from the data in Table 7, the coating formed by coating the coating of the present invention has excellent wear resistance and extremely low loss of quality during use.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The wear-resistant anticorrosive paint for the inner wall of the heat distribution pipeline is characterized by comprising a component A and a component B, wherein the component A comprises phenolic epoxy resin, organic silicon epoxy hybrid resin, methyl isobutyl ketone, inorganic filler and auxiliary agent; the B component comprises modified alicyclic amine and amino alkoxy silane;
wherein the inorganic filler comprises modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide, carbon fiber and titanium dioxide.
2. The wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the auxiliary agent comprises: a polymer defoaming agent without organic silicon, a high molecular copolymer dispersing agent containing pigment affinity groups, hydrophobic fumed silica and a castor oil modified derivative rheological additive.
3. The wear-resistant anticorrosive paint for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the epoxy equivalent of the novolac epoxy resin is 168-178 g/eq.
4. The wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the epoxy equivalent of the organic silicon epoxy hybrid resin is 445-455 g/eq.
5. The wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the modified alicyclic amine has an active hydrogen equivalent of 112-118.
6. The wear-resistant and corrosion-resistant coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the amino alkoxy silane has dual-functional reactivity of silane-primary amino and hydrolyzable ethoxy silyl.
7. The wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1 or 2, wherein the component A comprises the following components in percentage by weight:
8. the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the component B comprises, by weight:
72.5-75.5% of modified alicyclic amine;
24.5 to 27.5% of aminoalkoxysilane.
9. The wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 7 or 8, wherein the weight ratio of the component A to the component B is 100: 18 to 27.5, respectively.
10. The preparation method of the wear-resistant anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in any one of claims 1 to 9, characterized by comprising the following steps:
the preparation steps of the component A are as follows:
mixing phenolic epoxy resin and organic silicon epoxy hybrid resin, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, continuously stirring and dispersing, adding hydrophobic fumed silica, increasing the rotating speed, dispersing at a high speed, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, silicon carbide and titanium dioxide under medium-speed stirring, increasing the rotating speed, continuously stirring, reducing the rotating speed when the temperature reaches 40 ℃, adding a castor oil modified derivative rheological aid to obtain a mixture, and increasing the rotating speed to enable the temperature of the mixture to reach 45-50 ℃ and keep the temperature unchanged; then standing the mixture, cooling to room temperature, and grinding until the fineness is less than or equal to 60 mu m; adding carbon fiber and methyl isobutyl ketone into the ground mixture in sequence, and dispersing uniformly to obtain a component A;
the preparation steps of the component B are as follows:
and dispersing the modified alicyclic amine and the amino alkoxy silane uniformly in a clean container without water and alcohol solvent residues to obtain the component B.
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