CN115806771B - Special anti-corrosion flame-retardant paint for power equipment and preparation method thereof - Google Patents
Special anti-corrosion flame-retardant paint for power equipment and preparation method thereof Download PDFInfo
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- CN115806771B CN115806771B CN202211515873.7A CN202211515873A CN115806771B CN 115806771 B CN115806771 B CN 115806771B CN 202211515873 A CN202211515873 A CN 202211515873A CN 115806771 B CN115806771 B CN 115806771B
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- Prior art keywords
- agent
- flame
- parts
- retardant
- corrosion
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 166
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 239000003973 paint Substances 0.000 title claims abstract description 113
- 238000005260 corrosion Methods 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims abstract description 51
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 119
- 229920005989 resin Polymers 0.000 claims abstract description 51
- 239000011347 resin Substances 0.000 claims abstract description 51
- 239000002904 solvent Substances 0.000 claims abstract description 38
- 239000002270 dispersing agent Substances 0.000 claims abstract description 32
- 239000000080 wetting agent Substances 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000004088 foaming agent Substances 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 23
- 239000000049 pigment Substances 0.000 claims abstract description 22
- IBDMRHDXAQZJAP-UHFFFAOYSA-N dichlorophosphorylbenzene Chemical class ClP(Cl)(=O)C1=CC=CC=C1 IBDMRHDXAQZJAP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 14
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- 239000000463 material Substances 0.000 claims description 43
- 238000002156 mixing Methods 0.000 claims description 39
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 21
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- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 4
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- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
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- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 claims description 3
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Landscapes
- Paints Or Removers (AREA)
Abstract
The invention discloses a special anti-corrosion flame-retardant paint for electric equipment and a preparation method thereof, wherein the flame-retardant paint comprises the following raw materials in parts by weight: 100 parts of ODDP type flame-retardant resin, 15-90 parts of flame retardant, 15-65 parts of char forming agent, 25-85 parts of foaming agent, 0.1-5 parts of wetting agent, 0.1-5 parts of defoamer, 0.1-10 parts of dispersing agent, 0.5-10 parts of anti-settling agent, 1-60 parts of pigment and filler, 0.01-3 parts of flatting agent, 10-100 parts of curing agent and 10-100 parts of solvent; ODDP and phenylphosphonic acid dichloride derivatives are used as reaction raw materials to prepare the ODDP type flame-retardant resin; the structural formula of the ODDP isThe structural formula of the phenylphosphonic dichloride derivative is
Description
Technical Field
The invention relates to the technical field of corrosion prevention and flame retardance, in particular to special corrosion prevention and flame retardance paint for power equipment and a preparation method thereof.
Background
The temperature of the working environment of the transformer substation steel structure building is higher, and the conditions such as line short circuit and the like occur, so that the risk of fire disaster occurs. When a fire disaster occurs, the bearing parts of the steel structure are deformed due to heating, and personnel injury and property loss can be caused after the bearing parts soften and collapse. Therefore, fireproof paint needs to be painted on beams and columns of the steel structure building, and effective flame-retardant heat-insulating protection is provided for steel structure components. The safety protection of the steel member is mainly divided into corrosion protection and fireproof protection, and before the fireproof paint is painted, the steel member needs to be subjected to corrosion protection treatment, and general corrosion protection treatment needs to be performed by polishing, rust removal, oil removal and ash removal on the steel member, and then rust protection paint is sprayed. After the construction of the antirust paint is completed, the surface is required to be polished and ash removed, and then the spraying construction of the fireproof paint is carried out. Most of the commercial antirust paint has poor corrosion resistance and does not have flame-retardant, fireproof and heat-insulating effects. Commercial fire-retardant coatings are generally flame retardant and, in addition, have little insulating effect. When the fire breaks out, the coating is heated, and heat is quickly conducted to the base material, so that the steel member is deformed. The common fireproof paint has poor water resistance, adhesive force, weather resistance and other performances, and has the conditions of chalking, swelling, cracking, falling off and the like after the service time exceeds three months. In the power engineering, the overhaul period of the equipment is very short and is generally completed within tens of hours, the construction of the anti-corrosion paint and the fireproof paint can be performed by brushing for many times to reach the expected thickness (usually 1-2 mm), the single-pass construction thickness is usually 100-200 microns, the construction cost is very high, the construction period often exceeds the overhaul period, and the safety protection requirements of a transformer substation steel structure factory building cannot be met by the commercial anti-corrosion paint and the common fireproof paint.
The Chinese patent application document with publication number of CN114591676A discloses polyurethane flame-retardant paint for electric fire-fighting equipment, which takes polyurethane resin as a film forming substance, and is added with flame retardant, char forming agent, foaming agent, wetting agent, defoaming agent, dispersing agent, anti-settling agent, pigment filler, leveling agent, diluent and curing agent, wherein the prepared polyurethane flame-retardant paint has excellent performances of fire resistance, water resistance, adhesive force, weather resistance and the like, can meet the fire-proof requirement of fire-fighting pipelines of the electric equipment, but the film forming substance is polyurethane resin, has no flame retardance, so that the flame retardance of the flame-retardant paint is poor and the corrosion resistance is also unsatisfactory; therefore, there is a need to develop a special anticorrosive flame retardant paint for electrical equipment to replace conventional anticorrosive paint and fireproof paint.
The application of a cyclic phosphorus nitrogen synergistic halogen-free flame retardant is disclosed in Chinese patent application document with publication number of CN104017163A, wherein 2, 7-bis (N, N-dimethylamino) -1,6,3,8,2,7-octahydro-oxadiazole diphosphinic acid is used as a hard segment chain extender for halogen-free flame retardant modification of aqueous polyurethane emulsion, so that the halogen-free flame retardant modified aqueous polyurethane emulsion is used as the hard segment chain extender to be embedded into an aqueous polyurethane macromolecular chain, and researches show that: the addition of the flame retardant greatly improves the limiting oxygen index of the polyurethane film, enhances the thermal stability of the polyurethane film, increases the carbon residue rate of the material after pyrolysis, and reduces the consumption of the flame retardant. However, the "2, 7-bis (N, N-dimethylamino) -1,6,3,8,2,7-octahydro-oxadiazole-diphosphonic acid" in this patent is still a small molecule in nature, and does not produce ODDP-type polymer resin, so that it does not have film-forming property, and the aqueous polyurethane molecule produced by using it as a hard segment chain extender has a small phosphorus content, and the flame retardance is still not very ideal.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the special anti-corrosion flame-retardant paint for the power equipment, which can form a protective coating with a considerable thickness on a base material such as the surface of a transformer substation steel structure building and realize excellent anti-corrosion flame-retardant capability.
The invention solves the technical problems by the following technical means:
the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following raw materials in parts by weight: 100 parts of ODDP type flame-retardant resin, 15-90 parts of flame retardant, 15-65 parts of char forming agent, 25-85 parts of foaming agent, 0.1-5 parts of wetting agent, 0.1-5 parts of defoaming agent, 0.1-10 parts of dispersing agent, 0.5-10 parts of anti-settling agent, 1-60 parts of pigment and filler, 0.01-3 parts of leveling agent, 10-100 parts of curing agent and 10-100 parts of solvent.
Preferably, the ODDP type flame-retardant resin is prepared by reacting ODDP and phenylphosphonic acid dichloride derivatives as reaction raw materials;
the structural formula of the ODDP is
The structural formula of the phenylphosphonic dichloride derivative is
The beneficial effects are that: according to the invention, ODDP type flame-retardant resin is specifically taken as a film-forming substance, and a specific proportion of flame retardant, char forming agent, foaming agent, wetting agent, defoaming agent, dispersing agent, anti-settling agent, pigment filler, leveling agent, curing agent and solvent are added for matching, so that the obtained paint has excellent corrosion resistance and flame retardance; specifically, the phenylphosphonic acid dichloride derivative and the ODDP are used as raw materials to carry out nucleophilic substitution reaction to prepare the ODDP type flame-retardant resin, the molecules of the ODDP type flame-retardant resin simultaneously contain phosphorus and nitrogen elements, and a compact high polymer layer formed after film formation can block the corrosion of oxygen, water, acid and alkali and the like in the operation environment to the base material, so that the excellent anti-corrosion effect is achieved. When the paint film coating reaches a certain thickness, a flame-retardant heat-insulating layer is formed, and when a fire disaster occurs, the coating can generate chemical reaction to absorb a part of heat, and meanwhile, a compact carbonization layer can be formed to separate heat conduction, so that deformation of a base material is delayed, and the efficiency of fire rescue is improved. Meanwhile, the thickness of the single-pass coating of the construction is required to reach about one millimeter, and the construction is rapidly completed. The special anticorrosive flame-retardant paint for the integrated high-efficiency power equipment has good economic and social benefits.
Preferably, the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following raw materials in parts by weight: 100 parts of ODDP type flame-retardant resin, 55-70 parts of flame retardant, 25-45 parts of char forming agent, 25-65 parts of foaming agent, 0.5-2 parts of wetting agent, 1-2 parts of defoaming agent, 1-2 parts of dispersing agent, 1-2 parts of anti-settling agent, 1-35 parts of pigment and filler, 0.5-2 parts of leveling agent, 20-80 parts of curing agent and 40-100 parts of solvent.
Preferably, the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following raw materials in parts by weight: 100 parts of ODDP type flame-retardant resin, 55-70 parts of flame retardant, 20-40 parts of char forming agent, 25-45 parts of foaming agent, 0.5-2 parts of wetting agent, 1-2 parts of defoaming agent, 1-2 parts of dispersing agent, 1-2 parts of anti-settling agent, 1-30 parts of pigment and filler, 0.5-1 part of leveling agent, 25-70 parts of curing agent and 40-100 parts of solvent.
Preferably, the flame retardant is one or more of guanidine phosphate, ammonium hydrogen phosphate, ammonium polyphosphate, carbamide phosphate; the char forming agent is one or a combination of more of starch, cyclodextrin, sucrose, glucose, pentaerythritol and dipentaerythritol.
Preferably, the foaming agent is one or more of dicyandiamide, melamine cyanurate, urea, guanidine carbonate, semicarbazide.
Preferably, the wetting agent is one or more of SN-4745, SN-4727, SN-4741, SN-4748, SN-4763; the defoamer is one or more of SN-5710, SN-5702, SN-6710, SN-6722, SN-6724 and SN-6791; the dispersing agent is one or a combination of a plurality of SN-1320, SN-1728, SN-1791 and SN-1792; the anti-settling agent is one or a combination of more of hydrogenated castor oil and derivatives, polyethylene wax, polyamide wax and bentonite; the pigment and filler is one or a combination of more of iron oxide red, carbon black, chrome yellow, zinc oxide, titanium pigment, barium sulfate, talcum powder, calcium carbonate, wollastonite, mica powder, talcum powder and quartz powder; the leveling agent is one or more of SN-4910, SN-3016, SN-3760, SN-3780, SN-4710, SN-4323, SN-4345 and SN-4970; the curing agent is one or a combination of more of an amine curing agent, a polyamide curing agent and a polyether amine curing agent; the solvent is one or a combination of more of toluene, xylene, mesitylene, ethanol, propanol, n-butanol, ethyl acetate and butyl acetate.
Preferably, the curing agent is 1:1-3:1-5, a polyamide curing agent and a polyether amine curing agent.
Preferably, the curing agent is 1:1-3:1-4, a polyamide curing agent and a polyether amine curing agent.
Preferably, the curing agent is 1:1-2:1-3, a polyamide curing agent and a polyether amine curing agent.
The beneficial effects are that: the inventors of the present invention found that the weight ratio was 1:1-2:1-3, and the mixture of the amine curing agent, the polyamide curing agent and the polyether amine curing agent is used as the curing agent in the special anti-corrosion flame-retardant paint for the electric equipment, so that the special anti-corrosion flame-retardant paint for the electric equipment formed by the special anti-corrosion flame-retardant paint for the electric equipment, which is obtained by the method, has better film forming effect, and the special anti-corrosion flame-retardant paint for the electric equipment, which is obtained by the method, has relatively more excellent performance.
Preferably, the preparation process of the ODDP flame retardant resin comprises the following steps: uniformly mixing ODDP with a solvent to obtain a mixed solution, reducing the temperature of the mixed solution to 0 ℃, adding a phenylphosphonic acid dichloro derivative and alkali, heating to reflux, and reacting for 10 hours; after the reaction was completed, cooling to room temperature, adjusting ph=5-7, extracting with chloroform, combining the organic phases, drying the organic phases with anhydrous sodium sulfate, filtering, and spin-evaporating to obtain the ODDP type flame-retardant resin.
Preferably, the molar ratio of the ODDP to the phenylphosphonic dichloride derivative is 2:3, a step of; the molar amount of the base is 3 times the molar amount of the ODDP; the ODDP to solvent usage ratio was 0.2mol:50ml; the solvent is one or more of 1, 4-dioxane, tetrahydrofuran, toluene and xylene; the alkali is one or more of calcium hydroxide, sodium carbonate, triethylamine and ethylenediamine.
Preferably, the preparation process of the phenylphosphonic acid dichloride derivative comprises the following steps:
s1, according to the following 1:1.5:0.1:2.1:40, placing 1-chloro-4-vinylbenzene, triethyl phosphite, 4-tertiary butyl-2-phenylphenol, tertiary sodium butoxide and anhydrous dimethyl sulfoxide into a photoreactor, sealing, vacuumizing, backfilling with nitrogen, and stirring and reacting for 22 hours at room temperature, wherein the wavelength of light in the photoreactor is 427nm; the mixture after the reaction was quenched with brine, extracted with ethyl acetate and the organic layers combined;
s2, mixing the organic layer obtained in the step S1 with ammonium chloride, wherein the molar quantity of the ammonium chloride is 4 times that of 1-chloro-4-vinylbenzene used in the step S1, placing the mixture in a reactor for sealing, vacuumizing and filling oxygen, and reacting for 8 hours at 70 ℃;
s3, adding the product obtained after the reaction of S2 into a reactor, adding thionyl chloride and N' N-dimethylformamide, and carrying out reflux reaction for 10 hours at 130 ℃ to obtain the phenylphosphonic acid dichloride derivative after the reaction is finished; wherein the molar quantity of the thionyl chloride is 2.2 times of the molar quantity of the 1-chloro-4-vinylbenzene used in S1; the molar ratio of the thionyl chloride to the N' N-dimethylformamide is 2.2:10.
preferably, in the preparation process of the ODDP flame-retardant resin, 1mol/L dilute hydrochloric acid is used to adjust ph=5-7.
Preferably, the ODDP synthesis process specifically may include the following steps: is provided with N 2 Adding 0.1mol of phosphorus oxychloride and 0.1mol of dimethylamine hydrochloride into a reactor of a protection device, a thermometer and a feeder, adding 100mL of solvent at the same time, adding 0.15mol of alkali into the reactor, reacting the system in an ice salt bath environment at the temperature of minus 5 ℃ for 1 hour under magnetic stirring, reacting for 4 hours at room temperature, and removing precipitate by vacuum filtration to obtain filtrate; then 0.1mol of ethanolamine, 100mL of solvent, and 0.15mol of base were placed again in the presence of N 2 The filtrate is dripped into a reactor of a protection device, a thermometer and a feeder under the action of magnetic stirring, and the reaction is carried out for 1 hour at 0 ℃ and 2 hours at room temperature; after heating to 40 ℃ for 1 hour, the product is removed, precipitates are removed by vacuum filtration, the filtrate is washed with 400mL of petroleum ether for 2 times, insoluble substances are removed by vacuum filtration, and the filtrate is distilled under reduced pressure to obtain white solid. The product 2, 7-bis (N, N-dimethylamino) -1,6,3,8,2,7-octahydro-oxadiazole diphosphonic acid (ODDP) is obtained after vacuum drying.
Preferably, during ODDP synthesis, the solvent is one or more of 1, 4-dioxane, tetrahydrofuran, toluene, xylene.
Preferably, in the ODDP synthesis process, the base is one or more of calcium hydroxide, sodium carbonate, triethylamine, ethylenediamine.
Preferably, the manufacturer of the hydrogenated castor oil derivative is basf, germany, model: C040.
the invention also provides a preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment, which comprises the following steps:
s1, stirring and mixing ODDP type flame-retardant resin, part of solvent, part of dispersing agent, part of wetting agent and part of defoaming agent to obtain a first mixed material;
s2, stirring and mixing the residual wetting agent, the residual defoaming agent, the residual dispersing agent, the anti-settling agent, the flame retardant, the char forming agent, the foaming agent and the pigment filler with the first mixed material to obtain a second mixed material;
s3, refining the second mixed material to obtain a third mixed material with fineness less than 50 microns;
and S4, stirring and mixing the third mixed material and the rest raw materials to obtain the special anti-corrosion flame-retardant paint for the electric equipment.
The specific method for preparing the special anti-corrosion flame-retardant paint for the power equipment is not particularly limited, and a person skilled in the art can prepare the special anti-corrosion flame-retardant paint for the power equipment by adopting a conventional method for preparing the paint in the art. However, in order to enable the special anti-corrosion flame-retardant paint for the power equipment to have more excellent fireproof capability and good adhesive force, the special anti-corrosion flame-retardant paint for the power equipment is preferably prepared by adopting the method.
Preferably, in S1, the stirring and mixing time may be controlled to stir until a vortex occurs at the center of the liquid surface.
Preferably, in S1, the stirring speed of the stirring and mixing is 800-2600rpm; in S2, the stirring rotation speed of the stirring and mixing is 800-2600rpm; in S4, the stirring speed of the stirring and mixing is 1200-2000rpm.
Preferably, the process of S2 includes: mixing the residual dispersing agent, the residual wetting agent, the residual defoaming agent and the anti-settling agent with the first mixed material under the following mixing conditions: mixing time is 10-30min, and stirring speed is 800-1200rpm; then mixing with flame retardant, char forming agent and foaming agent under the following mixing conditions: mixing time is 30-60min, and stirring speed is 1000-2400rpm; then, the pigment and the filler are dispersed and mixed under the following mixing conditions: mixing for 10-30min, stirring at 1200-2600rpm, and continuing high-speed dispersion to obtain the second mixed material, wherein the dispersion conditions are as follows: mixing time is 10-30min, and stirring speed is 1200-2600rpm.
Preferably, the process of S2 includes: firstly, mixing and contacting the residual dispersing agent, the residual wetting agent, the residual defoaming agent and the anti-settling agent with the first mixed material, wherein the mixing and contacting conditions comprise: the contact temperature is 0-60 ℃, the contact time is 10-30min, and the stirring speed is 800-1200rpm, so as to obtain a mixture I; the mixture I is then mixed with a flame retardant, a char-forming agent and a foaming agent, the conditions of the mixed contact comprising: the contact temperature is 0-60 ℃, the contact time is 10-30min, and the stirring speed is 800-1000rpm, so as to obtain a mixture II; and then the mixture II is mixed and contacted with pigment filler, wherein the mixing and contacting conditions comprise: the contact temperature is 0-60 ℃, the contact time is 10-30min, and the stirring speed is 1800-2400rpm, so as to obtain a mixture III; this mixture III is then dispersed by high-speed stirring to obtain said second mixed material, the conditions of high-speed stirring comprising: the high-speed stirring and dispersing temperature is 0-60 ℃, the high-speed stirring and dispersing time is 30-120min, and the stirring speed is 1200-2600rpm.
Preferably, in S3, the second mixture is refined to obtain a third mixture having a fineness of less than 50 microns. Unless otherwise specified, the fineness as described herein means the maximum size of the material.
Preferably, in S4, the stirring rate of the stirring and mixing is 1000-1200rpm.
Preferably, in S4, the temperature of the stirring and mixing may be 0-40 ℃.
Preferably, in S4, the stirring and mixing time is 5-30min.
Preferably, the solvent, dispersant, wetting agent and defoamer are added in portions during the preparation process, and may also be added in portions, optionally in multiple portions, in various steps of the present invention, respectively.
Preferably, in S3, the refining is performed using a high-speed disperser or a sand mill.
The invention specifically takes the phenylphosphonic acid dichloride derivative and the ODDP as raw materials to carry out nucleophilic substitution reaction to prepare the ODDP type flame-retardant resin, the ODDP type flame-retardant resin has good film forming property, can completely replace other resins to use, and the molecular of the ODDP type flame-retardant resin simultaneously contains phosphorus and nitrogen elements, and a compact polymer layer formed after film formation can resist the corrosion of oxygen, water, acid and alkali and the like to a base material in an operation environment, thereby achieving excellent anti-corrosion effect. When the paint film coating reaches a certain thickness, a flame-retardant heat-insulating layer is formed, and when a fire disaster occurs, the coating can generate chemical reaction to absorb a part of heat, and meanwhile, a compact carbonization layer can be formed to separate heat conduction, so that deformation of a base material is delayed, and the efficiency of fire rescue is improved. Meanwhile, the thickness of the single-pass coating of the construction is required to reach about one millimeter, and the construction is rapidly completed. The special anticorrosive flame-retardant paint for the integrated high-efficiency power equipment has good economic and social benefits.
The special anti-corrosion flame-retardant paint for the power equipment can be painted on the surfaces of steel structure buildings and the like of a transformer substation at one time, the obtained paint can form a protective coating with a certain thickness on the surfaces of objects, the single-pass spraying thickness is more than 0.8 millimeter, and the construction efficiency is high. The obtained coating has excellent fireproof capacity, and also has good adhesive force and water resistance.
The special anti-corrosion flame-retardant paint for the power equipment has the advantages of good water resistance and strong weather resistance, and is simple in preparation method, low in cost, convenient to construct and stable in storage.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The test materials, reagents and the like used in the examples described below are commercially available unless otherwise specified.
Those of skill in the art, without any particular mention of the techniques or conditions, may follow the techniques or conditions described in the literature in this field or follow the product specifications.
In the following examples, 10 g is shown per part by weight.
In the following examples, the wetting agent, defoamer, dispersant and leveling agent used were all products from Shanghai deep bamboo chemical engineering Co. The curing agent is a product of Jinan sunny chemical technology Co., ltd (wherein the amine curing agent is amine curing agent 650, the polyamide curing agent is polyamide curing agent 651, and the polyether amine curing agent is polyether amine curing agent T31).
Example 1
Preparation of ODDP flame retardant resin
(1) Synthesis of 2, 7-bis (N, N-dimethylamino) -1,6,3,8,2,7-octahydro-oxadiazole diphosphonic acid (ODDP); the reaction principle is as follows:
the ODDP synthesis process specifically includes the following steps: is provided with N 2 Adding 0.1mol of phosphorus oxychloride and 0.1mol of dimethylamine hydrochloride into a reactor of a protection device, a thermometer and a feeder, adding 100mL of solvent 1, 4-dioxane at the same time, placing 0.15mol of sodium hydroxide into the feeder, adding into the reactor, reacting the system in an ice salt bath environment at the temperature of minus 5 ℃ for 1 hour under magnetic stirring, reacting for 4 hours at room temperature, and removing precipitate by vacuum suction filtration to obtain filtrate; then 0.1mol of ethanolamine, 100mL of solvent 1, 4-dioxane and 0.15mol of sodium hydroxide are placed again in the presence of N 2 The filtrate is dripped into a reactor of a protection device, a thermometer and a feeder under the action of magnetic stirring, and the reaction is carried out for 1 hour at 0 ℃ and 2 hours at room temperature; after heating to 40 ℃ for 1 hour, the product is removed, precipitates are removed by vacuum filtration, the filtrate is washed with 400mL of petroleum ether for 2 times, insoluble substances are removed by vacuum filtration, and the filtrate is distilled under reduced pressure to obtain white solid. The product 2, 7-bis (N, N-dimethylamino) -1,6,3,8,2,7-octahydro-oxadiazole diphosphonic acid (ODDP) is obtained after vacuum drying.
(2) Preparation of phenylphosphoryl dichloride derivatives:
the synthetic route is shown in the following chart:
step 1: 1.0mol of 1-chloro-4-vinylbenzene, 1.5mol of triethyl phosphite, 0.1mol of 4-tert-butyl-2-phenylphenol, 2.1mol of sodium tert-butoxide and 40mol of anhydrous dimethyl sulfoxide are placed in a photoreactor equipped with a stirring rod for sealing, and the reactor is vacuumized and backfilled with nitrogen three times. The reaction was stirred at room temperature in a photoreactor (wavelength 427 nm) for 22 hours. The mixture was quenched with brine and extracted with ethyl acetate. The organic layers were combined and used in the next reaction step.
Step 2: adding 4mol of ammonium chloride into the product obtained in the step 1, placing the mixture into a reactor for sealing, vacuumizing and filling oxygen, and reacting at 70 ℃ for 8 hours, wherein the product is used for the next reaction.
Step 3: and (2) placing the product obtained in the step (2) in a reactor, adding 2.2mol of thionyl chloride, 10mol of N' N-dimethylformamide, and carrying out reflux reaction at 130 ℃ for 10 hours to obtain a target product after the reaction is finished, wherein the target product can be directly used for preparing ODDP type flame-retardant resin.
(3) Preparation of ODDP flame retardant resin: the preparation route is shown in the following chart:
adding 0.2mol of ODDP into a 500 mL round bottom flask, adding 50mL of solvent 1, 4-dioxane, and uniformly stirring to obtain a mixed solution; the temperature of the mixture was lowered to 0℃and 0.3mol of a phenylphosphonic acid dichloride derivative was added thereto, and 0.6mol of sodium hydroxide was added thereto, after the completion of the addition, the reaction mixture was refluxed for 10 hours. After the reaction was completed, the reaction mixture was cooled to room temperature, then adjusted to ph=7 with 1mol/L of diluted hydrochloric acid, then extracted with chloroform, and the organic phases were combined and dried over anhydrous sodium sulfate. Filtering and removing part of the solvent to obtain viscous transparent liquid, namely the ODDP type flame-retardant resin.
The formulation of the special anti-corrosion flame-retardant paint for the electrical equipment is shown in table 1:
TABLE 1
| Species of type | Parts by weight of |
| ODDP type flame-retardant resin | 100 |
| Flame retardant (guanidine phosphate) | 55 |
| Char-forming agent (starch) | 26 |
| Foaming agent (dicyandiamide) | 38 |
| Dispersing agent (SN-1320) | 1.6 |
| Defoaming agent (SN-5710) | 1.6 |
| Wetting agent (SN-4745) | 1.6 |
| Anti-settling agent (hydrogenated castor oil) | 2.2 |
| Pigment and filler (iron red) | 35 |
| Leveling agent (SN-3016) | 2 |
| Solvent (xylene) | 80 |
| Curing agent (amine curing agent) | 20 |
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
(1) At 25 ℃, adding ODDP type flame-retardant resin, a solvent accounting for 30 percent of the total weight of the solvent, a dispersing agent accounting for 30 percent of the total weight of the dispersing agent, a wetting agent accounting for 30 percent of the total weight of the wetting agent and a defoaming agent accounting for 30 percent of the total weight of the defoaming agent into a paint mixing tank, starting stirring and mixing to obtain a first mixed material, wherein the stirring speed is 1000rpm until vortex appears in the center of a liquid level;
(2) Adding the residual dispersing agent, the residual wetting agent, the residual defoaming agent and the anti-settling agent into the paint mixing tank in the step (1); adding the flame retardant, the char forming agent and the foaming agent into a paint mixing tank, and dispersing the materials for 20min at a stirring speed of 2000rpm after the materials are added so as to fully mix the materials; then adding pigment and filler into a paint mixing tank, and dispersing for 80min at a stirring speed of 2000rpm to obtain a second mixed material;
(3) Refining the second mixed material to obtain a third mixed material, and specifically, grinding the second mixed material to a fineness of less than 50 microns by a sand mill for later use;
(4) And adding the rest raw materials into the third mixed material at 25 ℃, stirring and dispersing, wherein the stirring speed is 1400rpm, and the stirring time is 20min to obtain the special anti-corrosion flame-retardant paint PT1 for the power equipment.
Example 2
The formula of the special anti-corrosion flame-retardant paint for the electrical equipment is shown in table 2:
TABLE 2
| Species of type | Parts by weight of |
| ODDP type flame-retardant resin | 100 |
| Flame retardant (ammonium phosphate) | 55 |
| Carbonizing agent (dipentaerythritol) | 26 |
| Foaming agent (Melamine cyanurate) | 38 |
| Dispersing agent (SN-1728) | 1.6 |
| Defoaming agent (SN-6722) | 1.6 |
| Wetting agent (SN-4748) | 1.6 |
| Anti-settling agent (Polyamide wax) | 2 |
| Pigment and filler (titanium white) | 30 |
| Leveling agent (SN-3760) | 2 |
| Solvent (xylene: n-butanol volume ratio=3:1) | 50 |
| Curing agent (Polyamide curing agent) | 25 |
Wherein the ODDP type flame retardant resin is prepared by the preparation method of example 1.
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
(1) At 30 ℃, adding ODDP type flame-retardant resin, a solvent accounting for 60 percent of the total weight of the solvent, a dispersing agent accounting for 60 percent of the total weight of the dispersing agent, a wetting agent accounting for 60 percent of the total weight of the wetting agent and a defoaming agent accounting for 60 percent of the total weight of the defoaming agent into a paint mixing tank, starting stirring, and stirring and mixing to obtain a first mixed material, wherein the stirring speed is 1200rpm until vortex appears at the center of a liquid level;
(2) Adding the residual dispersing agent, the residual wetting agent, the residual defoaming agent and the anti-settling agent into the paint mixing tank in the step (1); adding the flame retardant, the char forming agent and the foaming agent into a paint mixing tank, and dispersing the materials for 20min at a stirring speed of 2000rpm after the materials are added so as to fully mix the materials; then adding pigment and filler into a paint mixing tank, and dispersing for 150min at a stirring speed of 2000rpm to obtain a second mixed material;
(3) Refining the second mixed material to obtain a third mixed material, and specifically, grinding the second mixed material to a fineness of less than 50 microns by a sand mill for later use;
(4) And adding the rest raw materials into the third mixed material at the temperature of 30 ℃, stirring and dispersing, wherein the stirring speed is 1400rpm, and the stirring time is 20min, so as to obtain the special anti-corrosion flame-retardant paint PT2 for the power equipment.
Example 3
The formula of the special anti-corrosion flame-retardant paint for the electrical equipment is shown in table 3:
TABLE 3 Table 3
| Species of type | Parts by weight of |
| ODDP type flame-retardant resin | 100 |
| Flame retardant (ammonium polyphosphate) | 55 |
| Char-forming agent (cyclodextrin: pentaerythritol mass ratio=1:2) | 26 |
| Foaming agent (Melamine cyanurate) | 38 |
| Dispersing agent (SN-1791) | 1.6 |
| Defoaming agent (SN-6791) | 1.6 |
| Wetting agent (SN-4745) | 1.6 |
| Anti-settling agent (Bentonite) | 2 |
| Pigment and filler (titanium white) | 30 |
| Leveling agent (SN-4910) | 2 |
| Solvent (xylene: n-butanol volume ratio=3:2) | 60 |
| Curing agent (polyether amine curing agent) | 30 |
Wherein the ODDP type flame retardant resin is prepared by the preparation method of example 1.
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
the same preparation method as in example 1 is used for obtaining the special anti-corrosion flame-retardant paint PT3 for the electric equipment.
Example 4
The formulation of the special anti-corrosion flame-retardant paint for the electric equipment is similar to that in the example 1, except that:
the flame retardant used in this example is guanidine phosphate in mass ratio: ammonium phosphate: ammonium polyphosphate = 1:2:3, the total parts by weight of the mixture being the same as in example 1.
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
the same preparation method as in example 1 is used for obtaining the special anti-corrosion flame-retardant paint PT4 for the electric equipment.
Example 5
The formulation of the special anti-corrosion flame-retardant paint for the electric equipment is similar to that in the example 1, except that:
the char-forming agent used in this example was cyclodextrin in mass ratio: glucose: pentaerythritol=1: 3:4, the total parts by weight of the mixture being the same as in example 1.
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
the same preparation method as in example 1 is used for obtaining the special anti-corrosion flame-retardant paint PT5 for the electric equipment.
Example 6
The formula of the special anti-corrosion flame-retardant paint for the electrical equipment is shown in table 4:
TABLE 4 Table 4
| Species of type | Parts by weight of |
| ODDP type flame-retardant resin | 100 |
| Flame retardant (ammonium polyphosphate) | 15 |
| Char-forming agent (cyclodextrin: pentaerythritol mass ratio=1:2) | 65 |
| Foaming agent (Melamine) | 25 |
| Dispersing agent (SN-1792) | 10 |
| Defoaming agent (SN-5702) | 0.1 |
| Wetting agent (SN-4727) | 5 |
| Anti-settling agent (polyethylene wax) | 10 |
| Pigment and filler (titanium white) | 60 |
| Leveling agent (SN-3780) | 0.01 |
| Solvent (xylene: n-butanol volume ratio=3:2) | 100 |
| Curing agent (polyether amine curing agent) | 10 |
The preparation method of the ODDP type flame retardant resin is different from that of the example 1 only in that: in (3), tetrahydrofuran is used to replace the solvent 1, 4-dioxane therein; sodium carbonate is used for replacing sodium hydroxide in the sodium carbonate; the reaction solution was adjusted to ph=5 with 1mol/L dilute hydrochloric acid.
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
the same preparation method as in example 1 is used for obtaining the special anti-corrosion flame-retardant paint PT6 for the electric equipment.
Example 7
The formula of the special anti-corrosion flame-retardant paint for the electric equipment is shown in table 5:
TABLE 5
| Species of type | Parts by weight of |
| ODDP type flame-retardant resin | 100 |
| Flame retardant (carbamide phosphate) | 90 |
| Char-forming agent (sucrose: pentaerythritol mass ratio=1:2) | 15 |
| Foaming agent (Urea) | 65 |
| Dispersing agent (SN-1791) | 1 |
| Defoaming agent (SN-6710) | 5 |
| Wetting agent (SN-4741) | 0.1 |
| Anti-settling agent (Bentonite) | 0.5 |
| Pigment and filler (Zinc oxide) | 1 |
| Leveling agent (SN-4710) | 3 |
| Solvent (toluene) | 70 |
| Curing agent (polyether amine curing agent) | 30 |
The preparation method of the ODDP type flame retardant resin differs from that of example 1 only in that toluene is used instead of 1, 4-dioxane as a solvent in (3); triethylamine is used for replacing sodium hydroxide in the aqueous solution; the ODDP type flame-retardant resin was prepared by adjusting the reaction solution to pH=6 using 1mol/L dilute hydrochloric acid.
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
the same preparation method as in example 1 is used for obtaining the special anti-corrosion flame-retardant paint PT7 for the electric equipment.
Example 8
The formula of the special anti-corrosion flame-retardant paint for the electric equipment is shown in table 6:
TABLE 6
The preparation method of the ODDP type flame retardant resin differs from that of example 1 only in that xylene is used instead of 1, 4-dioxane as a solvent in (3); and (3) preparing the ODDP type flame retardant resin by using ethylenediamine to replace sodium hydroxide in the ODDP type flame retardant resin.
The preparation method of the special anti-corrosion flame-retardant paint for the electrical equipment comprises the following steps:
the same preparation method as in example 1 is used for obtaining the special anti-corrosion flame-retardant paint PT8 for the electric equipment.
Comparative example 1
The acrylic fireproof paint purchased in the market is named as D-PT1.
Comparative example 2
Acrylic resin steel structure anticorrosive paint purchased in the market is obtained as a comparative example D-PT2.
Comparative example 3
A corrosion-resistant flame retardant paint, the formulation of which is shown in table 7:
TABLE 7
Wherein the ODDP type flame retardant resin is prepared by the preparation method of example 1.
The preparation method of the anticorrosive flame retardant paint was the same as that of example 1, to obtain comparative example D-PT3. In the preparation process, if foaming agent is not added, the prepared paint is incompletely cured, cannot foam during firing, and does not have flame-retardant and heat-insulating effects.
Comparative example 4
An anticorrosive flame retardant paint, the formulation of which is shown in table 8:
TABLE 8
Wherein the ODDP type flame retardant resin is prepared by the preparation method of example 1.
The preparation method of the anticorrosive flame retardant paint was the same as that of example 1, to obtain comparative example D-PT4. In the preparation process, if a wetting agent is not added, the added powder floats on the surface during high-speed dispersion, and the special anti-corrosion flame-retardant paint for the power equipment in a normal state cannot be prepared.
Comparative example 5
A corrosion-resistant flame retardant paint, the formulation of which is shown in table 9:
TABLE 9
| Species of type | Parts by weight of |
| ODDP type flame-retardant resin | 100 |
| Flame retardant (guanidine phosphate) | 56 |
| Char-forming agent (starch) | 20 |
| Foaming agent (dicyandiamide) | 33 |
| Dispersing agent | 0 |
| Defoaming agent (SN-5710) | 2 |
| Wetting agent (SN-4745) | 2 |
| Anti-settling agent (hydrogenated castor oil) | 2 |
| Pigment and filler (iron red) | 35 |
| Leveling agent (SN-3016) | 2 |
| Solvent (mesitylene: n-butanol volume ratio=2:1) | 70 |
| Curing agent (Polyamide curing agent) | 20 |
Wherein the ODDP type flame retardant resin is prepared by the preparation method of example 1.
The preparation method of the anticorrosive flame retardant paint was the same as that in example 1, to obtain comparative example D-PT5. In the preparation process, if a dispersing agent is not added, the added powder can agglomerate and agglomerate during high-speed dispersion, and the special anti-corrosion flame-retardant paint for the power equipment in a normal state can not be prepared.
Comparative example 6
A corrosion-resistant flame retardant paint, the formulation of which is shown in table 10:
table 10
Wherein the ODDP type flame retardant resin is prepared by the preparation method of example 1.
The preparation method of the anticorrosive flame retardant paint was the same as that in example 1, to obtain comparative example D-PT6. In the preparation process, if no anti-settling agent is added, the prepared paint can generate obvious settling phenomenon within 24 hours and cannot be used normally.
Comparative example 7
An anticorrosive flame retardant paint, the formulation of which is shown in table 11:
TABLE 11
| Species of type | Parts by weight of |
| ODDP type flame-retardant resin | 100 |
| Flame retardant (guanidine phosphate) | 56 |
| Char-forming agent (starch) | 20 |
| Foaming agent (dicyandiamide) | 33 |
| Dispersing agent (SN-1320) | 2 |
| Defoaming agent (SN-5710) | 2 |
| Wetting agent (SN-4745) | 2 |
| Anti-settling agent (hydrogenated castor oil) | 2 |
| Pigment and filler (iron red) | 35 |
| Leveling agent | 0 |
| Solvent (xylene: n-butanol volume ratio=3:2) | 44 |
| Curing agent (Polyamide curing agent) | 20 |
Wherein the ODDP type flame retardant resin is prepared by the preparation method of example 1.
The preparation method of the anticorrosive flame retardant paint was the same as that in example 1, to obtain comparative example D-PT7. In the preparation process, if no leveling agent is added, sagging, stacking and other phenomena of the prepared paint can be generated in the curing process, and normal film formation cannot be performed.
The special anti-corrosion flame-retardant paint for the power equipment can be normally cured into a film by adding the curing agent, and the addition amount of the curing agent is compared and is not described in other ways.
In comparative examples 3 to 7, under the condition of respectively lacking the foaming agent, the wetting agent, the dispersing agent, the anti-settling agent and the leveling agent, the special anti-corrosion flame retardant paint for the electrical equipment and equipment which can be normally used cannot be prepared, and the special anti-corrosion flame retardant paint has no contrast with the examples in test experiments and is not described otherwise.
ODDP itself is a small molecule and does not have film forming property, in the application, ODDP small molecule is reacted with phenylphosphonic acid dichloride derivative to prepare ODDP type high molecular resin, so that the ODDP type high molecular resin can directly form film after reacting with curing agent. The phenylphosphonic acid dichloride derivative is also a small molecule and has no film forming property. The preparation of ODDP type high molecular resin is the key for preparing the anti-corrosion flame-retardant paint. All other additives are indispensable, and the ODDP type polymer resin has certain flame retardance, but cannot directly meet the requirements of GB 14007-2018, and a flame retardant, a char former and a foaming agent are required to be added to compensate. Other fillers and auxiliary agents are added to ensure that the anti-corrosion flame-retardant paint has better service performance, including sealing property, leveling property, adhesive force and the like, so that the anti-corrosion performance of the anti-corrosion flame-retardant paint can be improved.
Test case
The properties of the anticorrosive flame retardant paints prepared in the foregoing examples and comparative examples were tested, and the test results are shown in the following table.
As can be seen from the results of the table, firstly, the invention solves the problem that the anticorrosive paint of the power equipment is extremely easy to burn (the oxygen index is up to 32, and the flame-retardant time is up to 123 min). In addition, the special anti-corrosion flame-retardant paint for the power equipment solves the fireproof problem and has excellent performance (adhesive force of 1 grade, and neutral salt fog resistance of up to 4600 h) at the same time.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The special anti-corrosion flame-retardant paint for the electrical equipment is characterized in that: the raw materials comprise the following components in parts by weight: 100 parts of flame-retardant resin A, 15-90 parts of flame retardant, 15-65 parts of char forming agent, 25-85 parts of foaming agent, 0.1-5 parts of wetting agent, 0.1-5 parts of defoamer, 0.1-10 parts of dispersing agent, 0.5-10 parts of anti-settling agent, 1-60 parts of pigment and filler, 0.01-3 parts of leveling agent, 10-100 parts of curing agent and 10-100 parts of first solvent; the curing agent is an amine curing agent;
the flame-retardant resin A is prepared by taking a compound A and a phenylphosphonic acid dichloro derivative as reaction raw materials;
the structural formula of the compound A is
The structural formula of the phenylphosphonic dichloride derivative is
The preparation process of the flame-retardant resin A comprises the following steps: uniformly mixing the compound A with a second solvent to obtain a mixed solution, reducing the temperature of the mixed solution to 0 ℃, adding the phenylphosphonic acid dichloro derivative and alkali, heating to reflux, and reacting for 10 hours; after the reaction was completed, the mixture was cooled to room temperature, ph=5 to 7 was adjusted, extraction was performed with chloroform, the organic phases were combined, the organic phases were dried over anhydrous sodium sulfate, and after filtration, the flame-retardant resin a was obtained by rotary evaporation.
2. The special anti-corrosion flame-retardant paint for electrical equipment as claimed in claim 1, wherein: the flame retardant is one or a combination of more of guanidine phosphate, ammonium hydrogen phosphate, ammonium polyphosphate and carbamide phosphate; the char forming agent is one or a combination of more of starch, cyclodextrin, sucrose, glucose, pentaerythritol and dipentaerythritol.
3. The special anti-corrosion flame-retardant paint for electrical equipment as claimed in claim 1, wherein: the foaming agent is one or a combination of more of dicyandiamide, melamine cyanurate, urea, guanidine carbonate and semicarbazide.
4. The special anti-corrosion flame-retardant paint for electrical equipment as claimed in claim 1, wherein: the wetting agent is one or a combination of more of SN-4745, SN-4727, SN-4741, SN-4748 and SN-4763; the defoamer is one or more of SN-5710, SN-5702, SN-6710, SN-6722, SN-6724 and SN-6791; the dispersing agent is one or a combination of a plurality of SN-1320, SN-1728, SN-1791 and SN-1792; the anti-settling agent is one or a combination of more of hydrogenated castor oil and derivatives, polyethylene wax, polyamide wax and bentonite; the pigment and filler is one or a combination of more of iron oxide red, carbon black, chrome yellow, zinc oxide, titanium pigment, barium sulfate, talcum powder, calcium carbonate, wollastonite, mica powder and quartz powder; the leveling agent is one or more of SN-4910, SN-3016, SN-3760, SN-3780, SN-4710, SN-4323, SN-4345 and SN-4970; the first solvent is one or a combination of more of toluene, xylene, mesitylene, ethanol, propanol, n-butanol, ethyl acetate and butyl acetate.
5. The special anti-corrosion flame-retardant paint for electrical equipment as claimed in claim 1, wherein: the weight ratio of the curing agent is 1:1-3:1-5, a polyamide curing agent 651, and a polyether amine curing agent T31.
6. The special anti-corrosion flame-retardant paint for electrical equipment as claimed in claim 1, wherein: the molar ratio of the compound A to the phenylphosphonic dichloride derivative is 2:3, a step of; the molar amount of the base is 3 times the molar amount of the compound a; the dosage ratio of the compound A to the second solvent is 0.2mol:50ml; the second solvent is one or more of 1, 4-dioxane, tetrahydrofuran, toluene and xylene; the alkali is one or more of calcium hydroxide, sodium carbonate, triethylamine and ethylenediamine.
7. The special anti-corrosion flame-retardant paint for electrical equipment as claimed in claim 1, wherein: the preparation process of the phenylphosphonic acid dichloride derivative comprises the following steps:
s1, according to the following 1:1.5:0.1:2.1:40, placing 1-chloro-4-vinylbenzene, triethyl phosphite, 4-tertiary butyl-2-phenylphenol, tertiary sodium butoxide and anhydrous dimethyl sulfoxide into a photoreactor, sealing, vacuumizing, backfilling with nitrogen, and stirring and reacting for 22 hours at room temperature, wherein the wavelength of light in the photoreactor is 427nm; the mixture after the reaction was quenched with brine, extracted with ethyl acetate and the organic layers combined;
s2, mixing the organic layer obtained in the step S1 with ammonium chloride, wherein the molar quantity of the ammonium chloride is 4 times that of 1-chloro-4-vinylbenzene used in the step S1, placing the mixture in a reactor for sealing, vacuumizing and filling oxygen, and reacting for 8 hours at 70 ℃;
s3, adding the product obtained after the reaction of S2 into a reactor, adding thionyl chloride and N' N-dimethylformamide, and carrying out reflux reaction for 10 hours at 130 ℃ to obtain the phenylphosphonic acid dichloride derivative after the reaction is finished; wherein the molar quantity of the thionyl chloride is 2.2 times of the molar quantity of the 1-chloro-4-vinylbenzene used in S1; the molar ratio of the thionyl chloride to the N' N-dimethylformamide is 2.2:10.
8. a method for preparing the special anti-corrosion flame-retardant paint for the electrical equipment and equipment according to any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:
s1, stirring and mixing the flame-retardant resin A, part of a first solvent, part of a dispersing agent, part of a wetting agent and part of a defoaming agent to obtain a first mixed material;
s2, stirring and mixing the residual wetting agent, the residual defoaming agent, the residual dispersing agent, the anti-settling agent, the flame retardant, the char forming agent, the foaming agent and the pigment filler with the first mixed material to obtain a second mixed material;
s3, refining the second mixed material to obtain a third mixed material with fineness less than 50 microns;
and S4, stirring and mixing the third mixed material and the rest raw materials to obtain the special anti-corrosion flame-retardant paint for the electric equipment.
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