CN109971305B - Solvent-free high-temperature anticorrosive paint, anticorrosive coating and container - Google Patents
Solvent-free high-temperature anticorrosive paint, anticorrosive coating and container Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/63—Additives non-macromolecular organic
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J12/00—Pressure vessels in general
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
Abstract
The invention provides a solvent-free high-temperature anticorrosive paint, an anticorrosive coating and a container. The solvent-free high-temperature anticorrosive paint comprises novolac epoxy resin, bisphenol F epoxy resin, silane resin, a curing agent and ceramic micro powder. The phenolic epoxy resin, the bisphenol F epoxy resin, the silane resin and the curing agent of the solvent-free high-temperature anticorrosive coating are used in combination, so that the high temperature resistance, the corrosion resistance, the chemical resistance and the workability of the high-temperature-resistant anticorrosive coating can be improved; the addition of the micron ceramic filler can improve the mechanical strength of a paint film and further improve the high temperature resistance, the corrosion resistance, the chemical resistance and the wear resistance. The solvent-free high-temperature-resistant anticorrosive coating provided by the invention has excellent high temperature resistance, corrosion resistance, chemical resistance, wear resistance and workability, has extremely low VOC content, can obviously improve the construction efficiency, and reduces the construction time and VOC emission.
Description
Technical Field
The invention relates to the technical field of anticorrosive materials, in particular to a solvent-free high-temperature anticorrosive paint, an anticorrosive coating and a container.
Background
Petrochemical industry high temperature pressure vessels are one of the most hostile service environments and are a major challenge for property owners and operators. These containers, particularly those that are constantly subjected to various corrosive conditions, can eventually lead to severe internal erosion and corrosion.
Dating back to the seventies of the last century, organic epoxy storage-liner coatings were used for the protection of high temperature process vessels. Since then, organic storage-lining coatings have been widely used by most major oil companies around the world due to the large amount of material development. In the nineties, storage coatings having antiknock pressure relief and heat temperatures up to 120 ℃ were introduced for the protection of separators and various other types of process equipment. As wells are drilled deeper and deeper, resulting in higher and higher operating temperatures and pressures, vessel operators are now faced with the difficult task of addressing the problems associated with such service environments. Therefore, it is necessary to develop materials that can withstand more severe environments.
In designing high temperature storage-liner coatings, it is important to consider the cause of failure of conventional coatings. Many conventional coatings are solvent-based and suffer from, among other limitations, residual solvent in the paint film, voids left in the solvent from the cured coating during application, and then filled with process fluids leading to blistering and, in turn, early failure. In addition, higher environmental demands are increasingly disfavored for the use of solvent-based coatings.
Even 100% solids coating systems can present certain problems for applications at elevated temperatures. For example, coating systems with low crosslink density are susceptible to high levels of water and gas permeation, resulting in corrosion. This corrosion phenomenon increases dramatically as the polymer system reaches its softening point, heat distortion temperature, the movement of the polymer chains increases and penetration occurs more easily. Even conventional epoxy resins, which typically exhibit good permeation resistance at room temperature, provide only limited protection at elevated temperatures. In turn, high crosslink density coating systems, while exhibiting excellent temperature resistance, can be too stiff and crack during thermal cycling or bending.
Therefore, there is a need to develop a solvent-free high-temperature anticorrosive coating to meet the requirements of high-temperature and high-pressure processing equipment and storage containers in the petrochemical industry, and the coating has almost no VOC emission during construction, so as to ensure that the coating meets the extremely strict environmental protection regulations.
Disclosure of Invention
The invention mainly aims to provide a solvent-free high-temperature anticorrosive coating, an anticorrosive coating and a container, and aims to solve the problem that a high-temperature lining storage coating in the prior art cannot meet the anticorrosive requirement of a high-temperature high-pressure container.
In order to achieve the above objects, according to one aspect of the present invention, there is provided a solvent-free high-temperature anticorrosive paint comprising a novolac epoxy resin, a bisphenol F epoxy resin, a silane resin, a curing agent, and a ceramic micropowder.
Further, the solvent-free high-temperature anticorrosive paint comprises, by weight, 8-12 parts of novolac epoxy resin, 8-12 parts of bisphenol F epoxy resin, 10-14 parts of silane resin, 7-11 parts of a curing agent and 43-63 parts of ceramic micro powder, and preferably comprises: 9-11 parts of phenolic epoxy resin, 9-11 parts of bisphenol F epoxy resin, 11-13 parts of silane resin, 8-10 parts of curing agent and 46-59 parts of ceramic micro powder.
The novolac epoxy resin has an epoxy equivalent of 164 to 179 and a functionality of 2.5 to 2.8, preferably a bisphenol F epoxy resin has an epoxy equivalent of 160 to 180 and a functionality of 2.0 to 2.2, and preferably a silane resin is an epoxy-containing silane coupling agent.
Further, the curing agent is selected from any one or more of polyester cyclic polyamine, aliphatic amine and addition product of each and epoxy resin.
Further, the ceramic micro powder is selected from one or more of micron alumina, micron silicon dioxide and aluminum silicate ceramic micro beads.
Furthermore, the solvent-free high-temperature anticorrosive coating further comprises an epoxy accelerator, preferably 0.2-2.5 parts by weight of the epoxy accelerator, more preferably 0.5-2.0 parts by weight of the epoxy accelerator, and further preferably the epoxy accelerator is selected from any one or combination of a phenol, salicylic acid, carboxylic acid, sulfonic acid, tertiary amine and respective salts.
Furthermore, the solvent-free high-temperature anticorrosive paint further comprises a pigment, preferably 2-6 parts by weight of the pigment, more preferably 3-5 parts by weight of the pigment, and further preferably the pigment is any one or combination of more of titanium dioxide, iron oxide and carbon black.
Furthermore, the solvent-free high-temperature anticorrosive coating also comprises an auxiliary agent in parts by weight, preferably 0.2-2 parts of the auxiliary agent, and preferably 0.5-1.5 parts of the auxiliary agent.
According to another aspect of the invention, an anticorrosive coating is provided, which is formed by curing an anticorrosive paint, wherein the anticorrosive paint is any one of the solvent-free high-temperature anticorrosive paints.
According to another aspect of the present invention, there is provided a container having an anticorrosive coating, which is the above-described anticorrosive coating.
By applying the technical scheme of the invention, the phenolic epoxy resin, the bisphenol F epoxy resin, the silane resin and the curing agent of the solvent-free high-temperature anticorrosive coating are used in combination, so that the high temperature resistance, the corrosion resistance, the chemical resistance and the workability of the high-temperature-resistant anticorrosive coating can be improved; the addition of the micron ceramic filler can improve the mechanical strength of a paint film and further improve the high temperature resistance, the corrosion resistance, the chemical resistance and the wear resistance. The solvent-free high-temperature-resistant anticorrosive coating provided by the invention has excellent high temperature resistance, corrosion resistance, chemical resistance, wear resistance and workability, has extremely low VOC content, can obviously improve the construction efficiency, and reduces the construction time and VOC emission.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As the background art of the present application analyzes, the solvent-free anticorrosive paint of the prior art cannot meet the long-term anticorrosive requirement of the high-temperature container, and in order to solve the problem, the present application provides a solvent-free high-temperature anticorrosive paint, an anticorrosive coating and a container.
In an exemplary embodiment of the present application, a solvent-free high-temperature anticorrosive coating is provided, which includes a novolac epoxy resin, a bisphenol F epoxy resin, a silane resin, a curing agent, and a ceramic micropowder.
High crosslink density coatings can achieve their high temperature soak resistance, but can result in rigid coatings that are prone to cracking during thermal cycling and substrate bending. The solvent-free high-temperature anticorrosive coating disclosed by the invention is added with the silane resin, so that the solvent-free high-temperature anticorrosive coating has excellent flexibility and can inhibit cracks from expanding to a structure; at the same time, the addition of the silane resin provides the coating with high tensile strength and elongation, can withstand temperature and pressure cycling while maintaining its structural integrity, adhesion, and provides corrosion and chemical resistance. It can be seen that the solvent-free high temperature corrosion resistant coatings of the present application are unlike rigid coatings, which are less brittle and can withstand high radial, circumferential and longitudinal stresses, reduce cracking, breakage and crazing of the material, and move toward the substrate, thus accommodating the thermal cycling and bending requirements of high temperature containers.
Therefore, the phenolic epoxy resin, the bisphenol F epoxy resin, the silane resin and the curing agent of the solvent-free high-temperature anticorrosive coating can be used in combination to improve the high temperature resistance, the corrosion resistance, the chemical resistance and the workability of the high-temperature-resistant anticorrosive coating; the addition of the micron ceramic filler can improve the mechanical strength of a paint film and further improve the high temperature resistance, the corrosion resistance, the chemical resistance and the wear resistance. The solvent-free high-temperature-resistant anticorrosive coating provided by the invention has excellent high temperature resistance, corrosion resistance, chemical resistance, wear resistance and workability, has extremely low VOC content, can obviously improve the construction efficiency, and reduces the construction time and VOC emission.
In an embodiment of the present application, the solvent-free high temperature anticorrosive coating includes, by weight, 8 to 12 parts of novolac epoxy resin, 8 to 12 parts of bisphenol F epoxy resin, 10 to 14 parts of silane resin, 7 to 11 parts of curing agent, and 43 to 63 parts of ceramic micro powder, and preferably includes: 9-11 parts of phenolic epoxy resin, 9-11 parts of bisphenol F epoxy resin, 11-13 parts of silane resin, 8-10 parts of curing agent and 46-59 parts of ceramic micro powder. By controlling the dosage of the components, the components exert synergistic effect, and the high temperature resistance, corrosion resistance and wear resistance of the solvent-free high-temperature anticorrosive coating are improved.
The above-mentioned novolac epoxy resins may be comprised of one or more novolac epoxy resins, containing more than one epoxy group per molecule, located on internal, terminal or cyclic structures, which may be complexed with one or more suitable curing agents. By using in combination with bisphenol F epoxy resins and silane resins, the viscosity can be reduced, and the workability and physical properties improved. From the viewpoint of obtaining various excellent paint film properties, it is preferable that the novolac epoxy resin has an epoxy equivalent of 164 to 179 and a functionality of 2.5 to 2.8.
The novolac epoxy resins for use herein may be selected from any one or combination of: phenol-formaldehyde epoxy: araldite EPN 1179, Huntsman; phenol-formaldehyde epoxy: DEN 431, Dow; phenol-formaldehyde epoxy: epolloy 8240, CVC; phenol-formaldehyde epoxy: epikote Resin 170, Hexion; phenol-formaldehyde epoxy: NPPN-631, Nan Ya; phenol-formaldehyde epoxy: YDPN-631, Kukdo.
The bisphenol F epoxy resin has low viscosity and good compatibility with novolac epoxy resin. Bisphenol F epoxy resin is used in a phenolic epoxy system, so that the viscosity of the system can be reduced, and the workability of the system can be improved. From the viewpoint of obtaining various excellent paint film properties, it is preferable that the bisphenol F epoxy resin has an epoxy equivalent of 160 to 180 and a functionality of 2.0 to 2.2, for example, 2.1.
The bisphenol F epoxy resins used in the present application may be selected from any one or combination of more of the following: bisphenol F epoxy: araldite GY 282, Huntsman (epoxy equivalent 164-172, average molecular weight 3300-4100); bisphenol F epoxy: araldite GY 285, Huntsman (epoxy equivalent 163-172, average molecular weight 2000-3000); bisphenol F epoxy: DER 354, Dow (epoxy equivalent of 167-174, average molecular weight of 3400-4200); bisphenol F epoxy: epikote 862, Hexion (epoxy equivalent 165-173, average molecular weight 2500-4500); bisphenol F epoxy: NPEF-170, Nan Ya (epoxy equivalent 160-180, average molecular weight 2000-5000); bisphenol F epoxy: YDF-170, Kukdo (epoxy equivalent 160-180, average molecular weight 2000-5000).
The silane resins used in the present application are organosilicon compounds having two different functional groups, one of which reacts with organic and the other with inorganic. Preferably, the silane resin is an epoxy group-containing silane coupling agent. The silane can improve the mechanical strength of the composite material, improve the flexural strength, the tensile strength, the elasticity, the moisture resistance and the adhesive force, and a paint film can not be peeled off even after being soaked in water for a long time, so that the composite material can effectively prevent punctiform corrosion, crevice corrosion, contact corrosion and stress corrosion of different metals. The silane resins for use herein are any one or combination of more of the following: silane: silquest A-187 Silane, Momentive; silane: geniosi GF 80, Wacker; silane: dow Corning Z-6040, Dow Corning; silane: dynasylan GLYMO, Evonik; silane: KBM-403, Shin-Etsu.
In order to increase the curing rate, the curing agent contains at least two active hydrogen atoms linked with nitrogen, and the curing agent is preferably selected from one or more of polyester cyclic polyamine, aliphatic amine and addition product of each and epoxy resin. The above-mentioned aliphatic amines can provide a high level of corrosion resistance, but the resulting paint film is brittle and has poor compatibility with epoxy resins, easily causing amine-induced whitening. The addition product prepared by pre-reacting the aliphatic amine and the epoxy resin can improve the compatibility, but has little influence on the performance of a paint film. M-xylylenediamine is a curing agent containing no aromatic amine, which contains aromatic rings, combines some characteristics of aromatic amine and aliphatic amine, and can generally achieve good performance and workability when added to an epoxy resin. Preferably, the curing agent is selected from any one or more of the following combinations: poly (cyclic amine): ancamine 2167, Air Products; poly (cyclic amine): ancamine 2264, Air Products; fatty amine: MXDA, MGC; fatty amine: aradur 22, Huntsman; fatty amine: gaskamine 328, MGC.
The micron ceramic filler can not only improve the hardness of a paint film, but also improve the performances such as wear resistance, impact resistance, corrosion resistance and the like, and preferably, the ceramic micro powder is selected from one or more of micron alumina, micron silicon dioxide and aluminum silicate ceramic micro beads. The ceramic micropowder used in the present application is selected from any one or a combination of more of the following: alumina ceramic beads: DAM-03, Denka; alumina ceramic beads: DAM-05, Denka; silicon dioxide ceramic microbeads: FB-5D, Denka; aluminum silicate ceramic beads: w-210, 3M; aluminum silicate ceramic beads: w-410, 3M.
In order to increase the curing rate of the solvent-free high-temperature anticorrosive coating, the solvent-free high-temperature anticorrosive coating preferably further comprises an epoxy accelerator, preferably 0.2 to 2.5 parts by weight of the epoxy accelerator, more preferably 0.5 to 2.0 parts by weight of the epoxy accelerator, and further preferably the epoxy accelerator is selected from any one or more of phenols, salicylic acid, carboxylic acids, sulfonic acids, tertiary amines and respective salts. The above phenolic epoxy accelerator may be selected from one or more of 2,4, 6-tris (dimethylaminomethyl) phenol, p-tert-butylphenol, nonylphenol, salicylic acid, methanesulfonic acid, p-toluenesulfonic acid, calcium nitrate, sodium thiocyanate, triethyl borate and imidazole. Specifically, the epoxy accelerator is selected from any one of the following: ancamine K54 (Air Products), TEB (Bersum), and Accelerator DY 070 (Huntsman).
In order to reduce the cost and ensure the corrosion resistance of the solvent-free heavy-duty anticorrosive paint, the solvent-free heavy-duty anticorrosive paint further comprises 2-6 parts by weight of pigment, preferably 3-5 parts by weight of pigment. Further preferred pigments are any one or combination of more of titanium dioxide, iron oxide and carbon black.
The solvent-free high-temperature anticorrosive coating further comprises an auxiliary agent in parts by weight, preferably 0.2-2 parts of the auxiliary agent, and preferably 0.5-1.5 parts of the auxiliary agent. The above-mentioned auxiliaries may be wetting dispersants, rheological agents and antifoaming agents which are commonly used in the art. Wherein the rheological agent may be selected from any one or more of the following: bentone 38(Rheox), Cab-O-Sil TS-720(Cabot), Disparlon 6650(Kusumoto), Caryvallac MT (Cray Valley). The wetting dispersant may be Yelkin TS (Archer Daniels) and/or Disperbyk-164 (BYK). The defoaming agent may be BYK-066 (BYK).
In another exemplary embodiment of the present application, an anticorrosive coating is provided, which is formed by curing an anticorrosive paint, and the anticorrosive paint is any one of the solvent-free high-temperature anticorrosive paints.
The solvent-free high-temperature anticorrosive coating can improve the high temperature resistance, corrosion resistance, chemical resistance and workability of the high-temperature-resistant anticorrosive coating by combining the novolac epoxy resin, the bisphenol F epoxy resin, the silane resin and the curing agent; the addition of the micron ceramic filler can improve the mechanical strength of a paint film and further improve the high temperature resistance, the corrosion resistance, the chemical resistance and the wear resistance. The components are cooperatively used, so that the anticorrosive coating provided by the invention has excellent high temperature resistance, corrosion resistance, chemical resistance, wear resistance and workability, has extremely low VOC content, can obviously improve the construction efficiency, and reduces the construction time and VOC emission.
In yet another exemplary embodiment of the present application, a container is provided having a corrosion protective coating as described above. Because the anticorrosive coating of this application has superior high temperature resistance, corrosion resistance, chemical resistance and constructability, consequently for the container that has it has longer life-span. The container may be a high temperature and high pressure container.
The preparation of the anticorrosive paint is implemented by adopting a general technology in the paint industry, for example, various components are mixed and dispersed by using equipment such as a high-speed dispersion machine; and then filtered with a filter bag, shaker, or other filter.
The solvent-free heavy-duty anticorrosive coating has outstanding construction characteristics. The formed coating can be constructed by adopting the traditional airless spraying, brushing or roller coating mode, and the curing temperature can be as low as 10 ℃.
The matching system of the solvent-free high-temperature anticorrosive paint is particularly suitable for coating the inner surfaces of storage tanks and the like.
For example, a storage tank for storing crude oil, bio-fuel oil, solvent, water, produced water and the like, the temperature of the storage tank can reach 150 ℃, when the storage tank is used, a first solvent-free high-temperature anticorrosive paint with the thickness of 300 microns is coated firstly, and then a second solvent-free high-temperature anticorrosive paint with the thickness of 300 microns is coated; the processing container is a Norsok M-501 system 3D processing container, the pressure endured by the processing container is less than 3bar, the temperature is less than 75 ℃, when in use, a first solvent-free high-temperature anticorrosive coating with the thickness of 250 microns is coated firstly, and then a second solvent-free high-temperature anticorrosive coating with the thickness of 250 microns is coated; the processing container is a Norsok M-501 system 3E processing container, the pressure resistance is less than 70bar, the temperature is less than 80 ℃, and when the processing container is used, a first solvent-free high-temperature anticorrosive coating with the thickness of 250 micrometers is coated firstly, and then a second solvent-free high-temperature anticorrosive coating with the thickness of 250 micrometers is coated; the processing container with the model of Norsok M-501 system 3F can bear the pressure of less than 30bar and the temperature of less than 130 ℃, and when the processing container is used, a first solvent-free high-temperature anticorrosive paint with the thickness of 250 microns is firstly coated, and then a second solvent-free high-temperature anticorrosive paint with the thickness of 250 microns is coated.
The advantageous effects of the present application will be further described below with reference to examples and comparative examples. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
The materials used in the following examples and comparative examples are shown in Table 1.
TABLE 1
Examples 1 to 10
The solvent-free high-temperature anticorrosive paint in the embodiments 1 to 10 is realized by the following production process:
the component A comprises: uniformly mixing the novolac epoxy resin, the bisphenol F epoxy resin and the silane resin by using a high-speed dispersion machine, adding the ceramic micro powder, the pigment and the filler and the auxiliary agent in the dispersion process, and dispersing at a high speed until the fineness is 40 micrometers at most.
And B component: the curing agent and the epoxy accelerator are mixed uniformly.
Before use, the component A and the component B are mixed according to the weight ratio shown in the table 1 to prepare the solvent-free high-temperature anticorrosive paint. If there is no corresponding component in Table 2, the component is not added during the production process.
The compositions of the solvent-free high-temperature anticorrosive coatings provided in examples 1 to 6 are shown in Table 2. The weight composition of examples 7 to 10 was the same as in example 1.
Comparative examples 1 to 4
The solvent-free high-temperature anticorrosive coatings in comparative examples 1 to 4 of the invention are realized by the following production processes:
the component A comprises: uniformly mixing novolac epoxy resin, bisphenol F epoxy resin and silane resin by using a high-speed dispersion machine, adding a micron ceramic filler, a pigment filler and an auxiliary agent in the dispersion process, and dispersing at high speed until the fineness is 40 microns at most.
And B component: the curing agent and the accelerator are mixed uniformly.
Before use, the component A and the component B are mixed according to the weight ratio shown in the table 1 to prepare the solvent-free high-temperature anticorrosive paint.
The composition of the solvent-free high temperature resistant anticorrosive paint provided in comparative example 1 is shown in table 3. If there is no corresponding component in Table 3, the component is not added during the production process.
TABLE 2
TABLE 3
The drawing property, elongation, abrasion resistance, chemical resistance, water resistance, dry heat resistance, salt spray resistance and peeling property of the coating are detected, the test results are shown in tables 4 and 5, and the detection method is as follows:
and (3) drawing test: test method ISO 4624(ASTM D4541);
elongation percentage: test method ASTM D638;
wear resistance: test method ASTM D4060, CS-17, 1000 g;
chemical resistance: test method NACE TM-0185, crude oil + 3% brine;
water resistance: ISO 2812;
dry heat resistance: test method ASTM D5499, method a;
salt spray resistance test: test method ASTM B117;
cathode stripping: test method GB/T23257(ASTM G42).
TABLE 4
TABLE 5
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Drawing test in MPa | 20 | 19 | 25 | 18 |
| Elongation percentage of% | 2.9 | 2.7 | 1.8 | 0.5 |
| Abrasion resistance, mg | 65 | 62 | 44 | 49 |
| Chemical resistance, 150 ℃ for 30d | Slight foaming | Slight foaming | Slight foaming | Foaming |
| Water resistance, 100 ℃ and 120d | Slight foaming | Defect free | Defect free | Slight foaming |
| Heat and dryness resistance, 200 deg.C | Defect free | Defect free | Defect free | Defect free |
| Salt spray resistance test, 10000h | Foaming | Slight foaming | Defect free | Foaming |
| Cathodic disbonding at 90 deg.C for 30d | 6.2mm | 6.2mm | 6.5mm | 7.7mm |
Note that higher elongation indicates better flexibility of the coating.
According to the data of the above examples and comparative examples, it can be seen that the amounts of the novolac epoxy resin, the bisphenol F epoxy resin, the silane resin, the curing agent and the ceramic micro powder have a great influence on the high temperature chemical resistance, the salt spray resistance, the adhesion, the flexibility and the wear resistance, and therefore, the amounts of the novolac epoxy resin, the bisphenol F epoxy resin, the silane resin, the curing agent and the ceramic micro powder are controlled within the scope of the claims of the present invention, which is beneficial to improving the mechanical properties, the high temperature chemical resistance and the corrosion resistance of the coating, thereby improving the durability of the coating.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the phenolic epoxy resin, the bisphenol F epoxy resin, the silane resin and the curing agent of the solvent-free high-temperature anticorrosive coating are used in combination, so that the high temperature resistance, the corrosion resistance, the chemical resistance and the workability of the high-temperature-resistant anticorrosive coating can be improved; the addition of the micron ceramic filler can improve the mechanical strength of a paint film and further improve the high temperature resistance, the corrosion resistance, the chemical resistance and the wear resistance. The solvent-free high-temperature-resistant anticorrosive coating provided by the invention has excellent high temperature resistance, corrosion resistance, chemical resistance, wear resistance and workability, has extremely low VOC content, can obviously improve the construction efficiency, and reduces the construction time and VOC emission.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The solvent-free high-temperature anticorrosive paint is characterized by comprising 8-12 parts by weight of phenolic epoxy resin, 8-12 parts by weight of bisphenol F epoxy resin, 10-14 parts by weight of silane resin, 7-11 parts by weight of curing agent and 43-63 parts by weight of ceramic micro powder; the epoxy equivalent of the novolac epoxy resin is 164-179, and the functionality is 2.5-2.8; the bisphenol F epoxy resin has an epoxy equivalent of 160-180 and a functionality of 2.0-2.2; the silane resin is a silane coupling agent containing epoxy groups; the solvent-free high-temperature anticorrosive paint also comprises 0.2-2.5 parts of epoxy accelerator; the solvent-free high-temperature anticorrosive paint also comprises 2-6 parts of pigment; the solvent-free high-temperature anticorrosive paint also comprises 0.2-2 parts of an auxiliary agent; the ceramic micro powder is selected from one or more of micron alumina, micron silicon dioxide and aluminum silicate ceramic micro beads.
2. The solvent-free high-temperature anticorrosive paint according to claim 1, wherein the solvent-free high-temperature anticorrosive paint comprises, in parts by weight: 9-11 parts of the novolac epoxy resin, 9-11 parts of the bisphenol F epoxy resin, 11-13 parts of the silane resin, 8-10 parts of the curing agent and 46-59 parts of the ceramic micro powder.
3. The solvent-free high-temperature anticorrosive paint according to claim 1 or 2, wherein the curing agent is selected from any one or more of polyester cyclic polyamine, aliphatic amine and addition product of each and epoxy resin.
4. The solvent-free high-temperature anticorrosive paint according to claim 1, wherein the solvent-free high-temperature anticorrosive paint comprises 0.5-2.0 parts by weight of epoxy accelerator.
5. A solventless high temperature anticorrosion coating according to claim 1 wherein said epoxy accelerator is selected from any one or a combination of phenols, salicylic acid, carboxylic acids, sulfonic acids, tertiary amines and their salts.
6. The solvent-free high-temperature anticorrosive paint according to claim 1, wherein the solvent-free high-temperature anticorrosive paint comprises 3-5 parts by weight of pigment.
7. The solvent-free high-temperature anticorrosive paint according to claim 1, wherein the pigment is any one or more of titanium dioxide, iron oxide and carbon black.
8. The solvent-free high-temperature anticorrosive paint according to claim 1, wherein the solvent-free high-temperature anticorrosive paint comprises 0.5-1.5 parts by weight of an auxiliary agent.
9. An anticorrosive coating which is formed by curing an anticorrosive paint, and is characterized in that the anticorrosive paint is the solvent-free high-temperature anticorrosive paint according to any one of claims 1 to 8.
10. A container having an anti-corrosion coating, wherein the anti-corrosion coating is the anti-corrosion coating of claim 9.
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| CN112574637A (en) * | 2019-12-30 | 2021-03-30 | 天津市富特斯科技发展有限公司 | Preparation method of nano modified solvent-free epoxy ceramic coating |
| CN112266707B (en) * | 2020-10-13 | 2021-11-16 | 清华大学深圳国际研究生院 | High-temperature-resistant solvent-free epoxy primer for radiation crosslinking polypropylene thermal contraction belt |
| CN115477888A (en) * | 2021-05-31 | 2022-12-16 | 中国石油天然气集团有限公司 | Green long-acting anticorrosive coating and preparation method and use method thereof |
| CN113278343B (en) * | 2021-06-09 | 2022-08-19 | 厦门双瑞船舶涂料有限公司 | Temperature-resistant anticorrosive coating and preparation method thereof |
| CN115109469A (en) * | 2022-06-07 | 2022-09-27 | 上海保立佳化学技术有限公司 | Fast drying polymer emulsion and preparation method thereof |
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