CN114686093A - Polyurethane anticorrosive paint for electric fire-fighting equipment and preparation method and application thereof - Google Patents
Polyurethane anticorrosive paint for electric fire-fighting equipment and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- 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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C08L2203/00—Applications
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Abstract
The invention discloses a polyurethane anticorrosive paint for electric fire-fighting equipment, which relates to the technical field of fire prevention and flame retardance and is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin, 5-60 parts of preservative, 20-100 parts of flame retardant, 10-60 parts of char forming agent, 20-80 parts of foaming agent, 0.05-5 parts of wetting agent, 0.5-5 parts of defoaming agent, 0.5-10 parts of dispersing agent, 0.5-10 parts of anti-settling agent, 1-70 parts of pigment and filler, 0.01-3 parts of flatting agent, 1-100 parts of diluent and 10-100 parts of curing agent; the preservative is one or more of mica sheet, precipitated barium sulfate, zinc borate, barium metaborate, nano-montmorillonite, graphene oxide and molybdenum disulfide. The polyurethane flame-retardant anticorrosive paint provided by the invention replaces the conventional fireproof anticorrosive paint, can be coated on the surface of the fire-fighting pipe of the electrical equipment at one time to reach a certain thickness, and forms a flame-retardant anticorrosive layer, and the coating forms a compact sealing layer and a compact protective layer on the surface of the fire-fighting pipe of the electrical equipment, so that the flame-retardant anticorrosive paint can effectively play a role in corrosion prevention.
Description
Technical Field
The invention relates to the technical field of fire prevention and flame retardation, and particularly relates to polyurethane anticorrosive paint for electric fire-fighting equipment, and a preparation method and application thereof.
Background
The steel material is widely applied to power equipment, and the steel structure is easy to rust, so that the service performance of the steel structure material is reduced, and therefore, the steel structure material needs to be sprayed with anticorrosive paint to avoid being corroded. Moreover, the oil storage capacity of the extra-high voltage converter transformer is about 130 t-200 t, and related accident cases show that the converter transformer fire is generally deflagration fire, the fire is rapidly developed, the oil temperature is higher, the fire intensity is large, the paper "research on dry burning resistance of fire fighting pipeline of extra-high voltage converter transformer" (Zhang Jia Qing, Hoyi, Li Chang Hai, Zhou Fu, Huang Yong. research on dry burning resistance of fire fighting pipeline of extra-high voltage converter transformer [ J/OL ]. high-voltage electric appliance 1-7[2021-12-20]. http:// kns.cnki.net/kcms/tail/61.1127. TM.0210712.1605.002. html.) fire extinguishing experiment of full-size transformer shows that the high-temperature hot oil fire of the transformer develops fiercely, the most vigorous combustion state can be achieved within tens of seconds after ignition, and the highest temperature in the combustion process is close to 1400 ℃, and the typical temperature is about 1200 ℃. As shown in fig. 1.
The GB 14907 Steel Structure fireproof coating stipulates the construction fire endurance as follows: the test piece loses the bearing capacity or reaches the specified average temperature to determine that the average temperature of the test piece in the whole fire resistance test time is not more than 538 ℃. The temperature measured in the full-scale real entity fire scene of the converter transformer far exceeds the temperature required by the standard, as shown in fig. 2, so that further research needs to be carried out on the corresponding fortification standard.
For this purpose, fire-fighting pipelines are installed around the power equipment, for example in large substations. When a fire disaster occurs, due to heating, the fire fighting pipeline of the power equipment can deform (including the rubber sealing ring at the joint in the pipeline), so that the water pressure is unstable, and the water can not be sprayed to the fire disaster, thereby delaying or failing the fire rescue.
The common fireproof coating for the power equipment sold in the market at present cannot guarantee the functional integrity of the fire-fighting pipeline of the power equipment after being heated when a fire disaster occurs. In the early test, the coating expansion foaming effect is increased along with the increase of the temperature of a fire source and the initial thickness when the thickness of the fireproof coating is not less than 1.5mm, a carbon-like layer which is difficult to burn is generated, and when the coating thickness is not less than 2.0mm, the fireproof coating has a good protection effect on a fire-fighting pipeline and a joint.
However, the thickness of the coating can reach 2mm only by brushing fire-retardant coatings on the market for ten times, as shown in table 1, at least 4 courses of fire-retardant coatings and 1 course of finish paint need to be brushed, the number of construction courses is large, the hard drying time of each course is long, the construction period is long, the overhaul time of a transformer substation/converter station cannot meet the requirement of the construction period, and the construction quality cannot be guaranteed; and the power failure can cause huge economic loss and adverse social influence, and the economic loss caused by one hour of power failure reaches millions to millions of yuan.
TABLE 1 work period for painting fire-retardant coating on single converter transformer water spray fire-fighting pipe network
In conclusion, the fire-retardant coating purchased from the market has poor water resistance, adhesion, weather resistance and other performances, and the conditions of chalking, bulging, cracking, falling off and the like can occur after the service life exceeds three months. Meanwhile, the maintenance period of the power equipment is short and is generally finished within dozens of hours, the common fire-proof coating sold in the market can cover the fire-fighting pipeline after being coated for many times, and the construction period of the common fire-proof coating far exceeds the maintenance period, so that the common fire-proof coating sold in the market cannot meet the fire-proof requirement of the fire-fighting pipeline of the power equipment.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, the special paint for the fire fighting pipeline of the electrical equipment has poor adhesion, weather resistance and other properties, and the conditions of pulverization, bulging, cracking, falling off and the like can occur after the special paint is used for more than three months, so that the fire protection requirement of the fire fighting pipeline of the electrical equipment can not be met, and the polyurethane anticorrosive paint for the fire fighting equipment and the preparation method and the application thereof are provided.
The invention solves the technical problems through the following technical means:
the polyurethane anticorrosive paint for the electric fire-fighting equipment is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin, 5-60 parts of preservative, 20-100 parts of flame retardant, 10-60 parts of char forming agent, 20-80 parts of foaming agent, 0.05-5 parts of wetting agent, 0.5-5 parts of defoaming agent, 0.5-10 parts of dispersing agent, 0.5-10 parts of anti-settling agent, 1-70 parts of pigment and filler, 0.01-3 parts of flatting agent, 1-100 parts of diluent and 10-100 parts of curing agent; the preservative is one or more of mica sheet, precipitated barium sulfate, zinc borate, barium metaborate, nano-montmorillonite, graphene oxide and molybdenum disulfide.
Has the advantages that: according to the polyurethane flame-retardant anticorrosive paint composition provided by the invention, the polyurethane flame-retardant anticorrosive paint formed by the composition replaces the conventional fireproof anticorrosive paint, can be coated on the surface of a fire-fighting pipe of electric equipment at one time to reach a certain thickness, so as to form a flame-retardant anticorrosive layer, and the coating forms a compact sealing layer and a protective layer on the surface of the fire-fighting pipe of the electric equipment, so that the corrosion prevention effect can be effectively realized.
The graphene and the graphite nanosheets are novel two-dimensional carbon nanomaterials, have a lamellar structure, have good stability and barrier property on water, oxygen and ions, and can play a good physical shielding role when being used as a filler of a traditional coating, so that the corrosion resistance of an organic coating is improved; graphene serving as a single-layer carbon nano material can be prepared into a coating or used as a filler in an anticorrosive coating, and the coating has good flaky lapping barrier property, can play a role in shielding oxygen and corrosive media, reduces the permeability of the anticorrosive coating and further improves the anticorrosive property of the coating; compared with other anticorrosive coatings, the graphene anticorrosive coating has more obvious advantages in the aspects of thermal stability, mechanical property, antibacterial property and the like.
The polyurethane anticorrosive paint for the electric fire-fighting equipment can be coated on the surface of a fire-fighting pipeline of the electric fire-fighting equipment at one time, the coating thickness can reach 2mm after one-time coating, the paint is formed at one time, the paint has good adhesive force, the one-time forming is realized, the construction efficiency can be greatly improved, the construction period is shortened, the power failure time is reduced, the energy availability is improved, the economic, resource and energy consumption is reduced, and the social benefit is remarkable.
The polyurethane anticorrosive paint for the electric fire-fighting equipment can form a flame-retardant heat-insulating layer on the surface of a fire-fighting pipeline of the electric fire-fighting equipment at one time, when a fire disaster happens to the coating, a part of heat can be absorbed through chemical reaction, and meanwhile, a compact carbonization layer is formed to block the transfer of heat and oxygen, so that the coating has excellent fireproof capacity, the deformation of the fire-fighting pipeline of the electric fire-fighting equipment is delayed, the fire-fighting rescue efficiency is improved, and great economic benefit and social benefit are achieved.
The polyurethane anticorrosive paint for the electric fire-fighting equipment has excellent performances such as fire resistance, water resistance, adhesive force, weather resistance and the like, and can meet the fire-proof requirement of a fire-fighting pipeline of the electric fire-fighting equipment.
Preferably, the polyurethane anticorrosive paint for the electric fire-fighting equipment is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin, 10-30 parts of preservative, 55-70 parts of flame retardant, 20-40 parts of char forming agent, 20-40 parts of foaming agent, 0.5-2 parts of wetting agent, 1-3 parts of defoaming agent, 1-3 parts of dispersing agent, 1-3 parts of anti-settling agent, 1-30 parts of pigment and filler, 0.5-1 part of flatting agent, 35-80 parts of diluent and 20-80 parts of curing agent.
Preferably, the polyurethane resin is one or more of a vinyl polyurethane resin, an acrylic modified polyurethane resin and a blocked polyurethane resin.
Preferably, the flame retardant is one or more of guanidine phosphate, ammonium hydrogen phosphate and ammonium polyphosphate.
Preferably, the char-forming agent is one or more of starch, cyclodextrin, sucrose, glucose, pentaerythritol, and dipentaerythritol.
Preferably, the foaming agent is one or more of dicyandiamide, melamine cyanurate, urea, guanidine carbonate and semicarbazide.
Preferably, the curing agent is one or more of toluene diisocyanate, biuret polyisocyanate and trimer type isocyanate.
Preferably, the curing agent is in a weight ratio of 5: (5-20): (5-30) a mixture of toluene diisocyanate, biuret polyisocyanate, and trimer type isocyanate.
Has the advantages that: the weight ratio is 5: (5-20): the toluene diisocyanate, biuret polyisocyanate and trimer type isocyanate in (5-30) are used as the curing agent in the polyurethane anticorrosive paint composition, so that the polyurethane anticorrosive paint formed by the obtained polyurethane anticorrosive paint composition has better film forming effect, and the performance of the obtained polyurethane anticorrosive paint is relatively more excellent.
Preferably, the anti-settling agent is one or more of hydrogenated castor oil and derivatives, polyethylene wax and polyamide wax.
Preferably, the dispersant is one or more of SN-1320, SN-1728, SN-1791, SN-1792.
Preferably, one or more of the leveling agents SN-3016, SN-3760, SN-3780, SN-4710, SN-4323, SN-4345 and SN-4970.
Preferably, the diluent is one or more of xylene, mesitylene, ethyl acetate, butyl acetate, N 'N-dimethylformamide, N' N-dimethylacetamide.
Preferably, the pigment and filler is one or more of iron oxide red, carbon black, chrome yellow, zinc oxide, titanium dioxide, barium sulfate, talcum powder, calcium carbonate, wollastonite, mica powder, talcum powder and quartz powder.
Preferably, the wetting agent is one or more of SN-4727, SN-4741, SN-4745, SN-4748, SN-4763.
Preferably, the defoaming agent is one or more of SN-5702, SN-5710, SN-5780, SN-6710, SN-6722, SN-6724, SN-6728 and SN-6791.
The present invention is not particularly limited to a specific method for preparing the polyurethane anticorrosive paint by using the polyurethane anticorrosive paint composition of the present invention, and those skilled in the art can prepare the polyurethane anticorrosive paint by using the polyurethane anticorrosive paint composition of the present invention by a method for preparing paint conventionally used in the art. However, in order to make the polyurethane anticorrosive paint prepared from the polyurethane anticorrosive paint composition of the present invention have more excellent fire resistance and good adhesion, the present invention preferably prepares the polyurethane anticorrosive paint by a method comprising:
(1) stirring and mixing a component A for the first time to obtain a first mixed material, wherein the component A contains polyurethane resin and a diluent;
(2) stirring and mixing a component B and the first mixed material for the second time to obtain a second mixed material, wherein the component B contains a preservative, a dispersing agent, a wetting agent, an anti-settling agent, a flame retardant, a char forming agent, a foaming agent, a pigment filler and a defoaming agent;
(3) refining the second mixed material to obtain a third mixed material with the fineness of less than 50 micrometers;
(4) and stirring and mixing the component C and the third mixed material for the third time to obtain the polyurethane anticorrosive paint, wherein the component C contains a leveling agent and a curing agent.
Has the advantages that: the polyurethane flame-retardant anticorrosive paint prepared by the preparation method can form a protective coating with a certain thickness on the surface of an object, and the obtained coating not only has excellent fireproof capacity and anticorrosive performance, but also has good adhesive force.
Preferably, in the step (1), the stirring speed of the first stirring and mixing is 400-600rpm, and the stirring time is 5-30 min; the time for the first mixing can also be controlled to be stirring until the center of the liquid surface generates vortex.
Preferably, in the step (2), the stirring speed of the second stirring and mixing is 400-2400rpm, and the stirring time is 30-120 min.
Preferably, in the step (4), the stirring speed of the third stirring and mixing is 300-600rpm, the stirring temperature is 0-40 ℃, and the stirring time is 5-30 min.
It is emphasized that, in the absence of additional description, the various components involved in the preparation method of the present invention, such as polyurethane resin, diluent, etc., may be selected in the same kind as those of the same components involved in the anticorrosive paint of the present invention, and in order to avoid repetition, the description will be omitted, and those skilled in the art should not be construed as limiting the scope of the present invention.
In the method of the present invention, the diluent may be added at one time in step (1), or may be added separately in a plurality of steps of the present invention, optionally in a plurality of times, for example, an appropriate amount of part may be added in step (1), and then an appropriate amount of diluent may be added in step (3) to clean the equipment for refining the second mixed material, and the material obtained after cleaning is used in the next step of the method of the present invention.
Preferably, in the step (2), the dispersing agent, the wetting agent, the defoaming agent and the anti-settling agent are mixed and contacted with the first mixed material at the contact temperature of 0-60 ℃ to obtain a mixture A, the mixing time is 10-30min, the stirring speed is 400-1600 rpm, and then the mixture A is mixed and contacted with the preservative, the flame retardant, the char-forming agent and the foaming agent at the contact temperature of 0-60 ℃, the mixing time is 30-60min, and the stirring speed is 1000-1600rpm to obtain a mixture B; then the mixture B and the pigment and filler are in dispersive mixing contact, the contact temperature is 0-60 ℃, the mixing time is 10-30min, the stirring speed is 400-1600 rpm, the mixture C is obtained, and then the mixture C is dispersed at a high speed for 10-30min at the rotation speed of 1600rpm, the temperature is 0-60 ℃, the stirring speed is 1000-60 ℃.
Preferably, in the step (3), the second mixed material is thinned to obtain a third mixed material with fineness less than 40 micrometers. The fineness described herein means the maximum size of the material unless otherwise specified. The apparatus for carrying out the refining in the present invention is not particularly limited, and may be, for example, a sand mill.
The polyurethane anticorrosive paint for the electric fire-fighting equipment is applied to the safety protection of fire-fighting pipelines of the electric fire-fighting equipment.
Has the advantages that: the polyurethane anticorrosive paint for the electric fire-fighting equipment is applied to the fire-fighting pipeline of the electric fire-fighting equipment, so that the construction efficiency can be greatly improved, the construction period can be shortened, the power failure time can be reduced, and the energy availability can be improved. The consumption of economy, resources and energy sources is reduced, and the social benefit is remarkable.
The polyurethane anticorrosive paint for the electric fire-fighting equipment can form a flame-retardant heat-insulating layer on the surface of a fire-fighting pipeline of the electric fire-fighting equipment at one time, when a fire disaster occurs, the coating can absorb a part of heat through chemical reaction, and simultaneously, a compact carbonization layer is formed to separate the spread of the heat, so that the coating has excellent fireproof capacity, thereby delaying the deformation of the fire-fighting pipeline of the electric fire-fighting equipment, being beneficial to improving the fire rescue efficiency and having great economic and social benefits.
The preservative used in the invention, graphene and graphite nanosheets are novel two-dimensional carbon nanomaterials, have a lamellar structure, have good stability and barrier property on water, oxygen and ions, and can play a good role in physical shielding when used as a filler of a traditional coating, so that the corrosion resistance of an organic coating is improved; graphene serving as a single-layer carbon nano material can be prepared into a coating or used as a filler in an anticorrosive coating, and the coating has good flaky lapping barrier property, can play a role in shielding oxygen and corrosive media, reduces the permeability of the anticorrosive coating and further improves the anticorrosive property of the coating; compared with other anticorrosive coatings, the graphene anticorrosive coating has more obvious advantages in the aspects of thermal stability, mechanical property, antibacterial property and the like.
The polyurethane anticorrosive paint for the electric fire-fighting equipment has excellent performances such as fire resistance, water resistance, adhesive force, weather resistance and the like, and can meet the fire-proof requirement of a fire-fighting pipeline of the electric fire-fighting equipment.
The invention has the advantages that: according to the polyurethane flame-retardant anticorrosive paint composition provided by the invention, the conventional fireproof anticorrosive paint is replaced by the polyurethane flame-retardant anticorrosive paint formed by the composition, the polyurethane flame-retardant anticorrosive paint can be coated on the surface of a fire-fighting pipe of electric equipment at one time to reach a certain thickness, so that a flame-retardant anticorrosive layer is formed, and the coating forms a compact closed layer and a protective layer on the surface of the fire-fighting pipe of the electric equipment, so that the corrosion prevention effect can be effectively realized.
The polyurethane anticorrosive paint for the electric fire-fighting equipment can be coated on the surface of a fire-fighting pipeline of the electric fire-fighting equipment at one time, the coating thickness can reach 2mm after one-time coating, the paint is formed at one time, the paint has good adhesive force, the one-time forming is realized, the construction efficiency can be greatly improved, the construction period is shortened, the power failure time is reduced, the energy availability is improved, the economic, resource and energy consumption is reduced, and the social benefit is remarkable.
The polyurethane anticorrosive paint for the electric fire-fighting equipment can form a flame-retardant heat-insulating layer on the surface of a fire-fighting pipeline of the electric fire-fighting equipment at one time, when a fire disaster happens to the coating, a part of heat can be absorbed through chemical reaction, and meanwhile, a compact carbonization layer is formed to block the transfer of heat and oxygen, so that the coating has excellent fireproof capacity, the deformation of the fire-fighting pipeline of the electric fire-fighting equipment is delayed, the fire-fighting rescue efficiency is improved, and great economic benefit and social benefit are achieved.
The polyurethane anticorrosive paint for the electric fire-fighting equipment has excellent performances such as fire resistance, water resistance, adhesive force, weather resistance and the like, and can meet the fire-proof requirement of a fire-fighting pipeline of the electric fire-fighting equipment.
Drawings
FIG. 1 is a graph showing the temperature measured during the combustion process in a full-scale true fire extinguishing test of a converter transformer in the background art paper of the present invention;
fig. 2 is a temperature contrast diagram of typical different temperature rise curves in a full-scale true solid fire scene of the converter transformer in the background art paper of the invention within 30 min.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, the vinyl polyurethane resin is from XYH4000, Wuxi Xin Yehao chemical Co., Ltd, and the closed polyurethane resin is from Deshi model: (
) BL 3175, bayer, germany; the polyurethane paint purchased in the market is from PUCM200, two lion paints Co., Ltd, Tianjin.
Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The specific techniques or conditions not specified in the examples can be performed according to the techniques or conditions described in the literature in the field or according to the product specification.
In the following examples, each part by weight represents 10 g.
Example 1
The formulation of the polyurethane anticorrosive paint for the electric fire-fighting equipment is shown in table 2.
TABLE 2 formulation of polyurethane anticorrosive paint in example 1
The preparation method of the polyurethane anticorrosive paint for the electric fire-fighting equipment specifically comprises the following steps:
(1) stirring and mixing the component A for the first time to obtain a first mixed material, specifically, adding polyurethane resin and a diluent into a paint mixing tank at 25 ℃, starting stirring at the speed of 500rpm until a vortex appears at the center of the liquid level;
(2) stirring and mixing the component B and the first mixed material for the second time to obtain a second mixed material, specifically, adding a dispersing agent, a wetting agent, a defoaming agent and an anti-settling agent into the paint mixing tank in the step (1), and dispersing the materials at a stirring speed of 600rpm for 20min after the materials are added to fully mix the materials; then adding the preservative, the flame retardant, the charring agent and the foaming agent into a paint mixing tank, and dispersing the materials for 20min at a stirring speed of 1600rpm 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 20min at the stirring speed of 600 rpm; finally stirring and dispersing at a high speed of 1500rpm for 30min 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 by using a sand mill until the fineness of the second mixed material is less than 40 micrometers for later use;
(4) performing third stirring and mixing on the component C and the third mixed material to obtain the polyurethane anticorrosive paint, specifically, adding a leveling agent and a curing agent into the third mixed material at 25 ℃, stirring and dispersing at the stirring speed of 400rpm for 20 min; the polyurethane anticorrosive paint PT1 is obtained.
Example 2
The formulation of the polyurethane anticorrosive paint for electric fire-fighting equipment is shown in table 3.
TABLE 3 formulation of polyurethane anticorrosive paint in example 2
The preparation method of the polyurethane anticorrosive paint for the electric fire-fighting equipment specifically comprises the following steps:
(1) stirring and mixing the component A for the first time to obtain a first mixed material, specifically, adding polyurethane resin and a diluent into a paint mixing tank at 30 ℃, starting stirring at the speed of 400rpm until a vortex appears at the center of the liquid level;
(2) stirring and mixing the component B and the first mixed material for the second time to obtain a second mixed material, specifically, adding a dispersing agent, a wetting agent, a defoaming agent and an anti-settling agent into the paint mixing tank in the step (1), and dispersing the materials at the stirring speed of 600rpm for 20min after the materials are added to fully mix the materials; adding the preservative, the flame retardant, the charring agent and the foaming agent into a paint mixing tank, and dispersing the materials at a stirring speed of 1600rpm for 20min 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 20min at the stirring speed of 600 rpm; finally stirring and dispersing at a high speed of 1500rpm for 30min 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 by using a sand mill until the fineness of the second mixed material is less than 40 micrometers for later use;
(4) performing third stirring and mixing on the component C and the third mixed material to obtain the polyurethane anticorrosive paint, specifically, adding a curing agent and a leveling agent into the third mixed material at the temperature of 30 ℃, stirring and dispersing at the stirring speed of 500rpm for 20 min; the polyurethane anticorrosive paint PT2 is obtained.
Example 3
The formulation of the polyurethane anticorrosive paint for electric fire-fighting equipment is shown in table 4.
Table 4 polyurethane anticorrosion paint formulation in example 2
The preparation method of the polyurethane anticorrosive paint was the same as that in example 1, and the polyurethane anticorrosive paint PT3 was obtained.
Example 4
The formulation of the polyurethane anticorrosion paint composition is similar to that of example 1, except that:
the flame retardant used in this example was guanidine phosphate: ammonium phosphate: ammonium polyphosphate is 1: 4: 3, the same weight portions.
The preparation method of the polyurethane anticorrosive paint was the same as that in example 1, and the polyurethane anticorrosive paint PT4 was obtained.
Example 5
The formulation of the polyurethane anticorrosion paint composition is similar to that of example 1, except that: the char-forming agent used in this example was cyclodextrin: glucose: pentaerythritol ═ 1: 2: 3.
the preparation method of the polyurethane anticorrosive paint was the same as that in example 1, and the polyurethane anticorrosive paint PT5 was obtained.
Comparative example 1
A commercially available polyurethane paint was designated D-1.
Comparative example 2
The preparation method of the anticorrosive paint has the formula shown in table 5.
Table 5 shows the formulation of the anticorrosive paint of comparative example 2
| Species of | Parts by weight |
| Polyurethane resin (vinyl polyurethane resin) | 100 |
| Dispersing agent (SN-1791) | 2 |
| Defoaming agent (SN-6791) | 2 |
| Wetting agent (SN-4745) | 2 |
| Anti-settling agent (polyethylene wax: polyamide wax ═ 1: 3, weight ratio) | 2 |
| Pigment filler (titanium white powder) | 30 |
| Flatting agent (SN-4910) | 2 |
| Diluent (xylene: butyl acetate ═ 1: 2, weight ratio) | 60 |
| Curing agent (toluene isocyanate: biuret polyisocyanate ═ 3: 1, weight ratio) | 30 |
The production method of this comparative example was the same as that in example 1, to obtain comparative example D-2.
The polyurethane anticorrosive paint can be normally cured to form a film by adding a curing agent, and the addition amount of the curing agent is compared without further description.
Test example
The same brushing method is adopted to test the brushing thickness of the coating, and after the test, the polyurethane paint purchased in the market can only be brushed for 0.1-0.2mm once, and the single-layer surface drying time is 4-12h, the coating in the embodiment 1 of the invention can be brushed for 2.0mm once, and the surface drying time is 4-5.5h, and the test results in other embodiments are basically the same as the embodiment 1.
The properties of the polyurethane anticorrosive paints prepared in the foregoing examples and comparative examples were measured, and the results are shown in Table 6.
Table 6 shows the results of measuring the properties of the polyurethane anticorrosive paints in examples and comparative examples
As can be seen from the results of Table 6, first, the polyurethane flame retardant anticorrosive paint of the present invention has excellent mechanical physical properties of the paint while solving the fire and corrosion problems. The graphene and the graphite nanosheets are novel two-dimensional carbon nanomaterials, have a lamellar structure, have good stability and barrier property on water, oxygen and ions, and can play a good physical shielding role when being used as a filler of a traditional coating, so that the corrosion resistance of an organic coating is improved; graphene serving as a single-layer carbon nano material can be prepared into a coating or used as a filler in an anticorrosive coating, and the coating has good flaky lapping barrier property, can play a role in shielding oxygen and corrosive media, reduces the permeability of the anticorrosive coating and further improves the anticorrosive property of the coating; compared with other anticorrosive coatings, the graphene anticorrosive coating has more obvious advantages in the aspects of thermal stability, mechanical property, antibacterial property and the like.
Secondly, the problem that the polyurethane paint is extremely easy to burn is solved, the fire resistance of the polyurethane paint is excellent, and the polyurethane paint can bear a high-temperature dry burning test of at least 1200 ℃ for 3min according to a high-temperature dry burning test method in an ultra-high voltage converter transformer fire-fighting pipeline dry burning resistance test research in the background art.
The polyurethane anticorrosive paint disclosed by the invention can be formed at one time while solving the fireproof problem, is not easy to roughen, and can be used for greatly improving the construction efficiency, shortening the construction period, reducing the power failure time and improving the energy availability ratio. The consumption of economy, resources and energy sources is reduced, and the social benefit is remarkable.
The polyurethane anticorrosive paint disclosed by the invention has excellent mechanical and physical properties, and has the advantages of high adhesion, good water resistance, strong weather resistance and the like.
The polyurethane anticorrosive paint provided by the invention has a remarkable development prospect and great economic benefit in the aspect of fire prevention of fire-fighting pipelines of electrical equipment.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a polyurethane anticorrosive paint for electric power fire-fighting equipment which characterized in that: the feed is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin, 5-60 parts of preservative, 20-100 parts of flame retardant, 10-60 parts of char forming agent, 20-80 parts of foaming agent, 0.05-5 parts of wetting agent, 0.5-5 parts of defoaming agent, 0.5-10 parts of dispersing agent, 0.5-10 parts of anti-settling agent, 1-70 parts of pigment and filler, 0.01-3 parts of flatting agent, 1-100 parts of diluent and 10-100 parts of curing agent; the preservative is one or more of mica sheet, precipitated barium sulfate, zinc borate, barium metaborate, nano-montmorillonite, graphene oxide and molybdenum disulfide.
2. The polyurethane anticorrosive paint for electric fire-fighting equipment according to claim 1, characterized in that: the polyurethane anticorrosive paint for the electric fire-fighting equipment is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin, 10-30 parts of preservative, 55-70 parts of flame retardant, 20-40 parts of char forming agent, 20-40 parts of foaming agent, 0.5-2 parts of wetting agent, 1-3 parts of defoaming agent, 1-3 parts of dispersing agent, 1-3 parts of anti-settling agent, 1-30 parts of pigment and filler, 0.5-1 part of flatting agent, 35-80 parts of diluent and 20-80 parts of curing agent.
3. The polyurethane anticorrosive paint for electric fire-fighting equipment according to claim 1, characterized in that: the polyurethane resin is one or more of vinyl polyurethane resin, acrylic modified polyurethane resin and closed polyurethane resin; the flame retardant is one or more of guanidine phosphate, ammonium hydrogen phosphate and ammonium polyphosphate; the charring agent is one or more of starch, cyclodextrin, sucrose, glucose, pentaerythritol and dipentaerythritol; the foaming agent is one or more of dicyandiamide, melamine cyanurate, urea, guanidine carbonate and semicarbazide; the anti-settling agent is one or more of hydrogenated castor oil and derivatives, polyethylene wax and polyamide wax; the pigment and filler is one or more of iron red, carbon black, chrome yellow, zinc oxide, titanium dioxide, barium sulfate, talcum powder, calcium carbonate, wollastonite, mica powder, talcum powder and quartz powder.
4. The polyurethane anticorrosive paint for electric fire-fighting equipment according to claim 1, characterized in that: the wetting agent is one or more of SN-4727, SN-4741, SN-4745, SN-4748 and SN-4763; the defoaming agent is one or more of SN-5702, SN-5710, SN-5780, SN-6710, SN-6722, SN-6724, SN-6728 and SN-6791; the dispersant is one or more of SN-1320, SN-1728, SN-1791 and SN-1792; one or more of leveling agents SN-3016, SN-3760, SN-3780, SN-4710, SN-4323, SN-4345 and SN-4970.
5. The polyurethane anticorrosive paint for electric fire-fighting equipment according to claim 1, characterized in that: the curing agent is one or more of toluene diisocyanate, biuret polyisocyanate and trimeric isocyanate.
6. The polyurethane anticorrosive paint for electric fire-fighting equipment according to claim 5, characterized in that: the curing agent is prepared from the following components in percentage by weight: (5-20): (5-30) a mixture of toluene diisocyanate, biuret polyisocyanate, and trimer type isocyanate.
7. The method for preparing the polyurethane anticorrosive paint for electric fire-fighting equipment as claimed in any one of claims 1 to 6, characterized in that: the method comprises the following steps:
(1) stirring and mixing a component A for the first time to obtain a first mixed material, wherein the component A contains polyurethane resin and a diluent;
(2) stirring and mixing a component B and the first mixed material for the second time to obtain a second mixed material, wherein the component B contains a preservative, a dispersing agent, a wetting agent, an anti-settling agent, a flame retardant, a char forming agent, a foaming agent, a pigment filler and a defoaming agent;
(3) refining the second mixed material to obtain a third mixed material with the fineness of less than 50 micrometers;
(4) and stirring and mixing the component C and the third mixed material for the third time to obtain the polyurethane anticorrosive paint, wherein the component C contains a leveling agent and a curing agent.
8. The method for preparing the polyurethane anticorrosive paint for the electric fire-fighting equipment according to claim 7, wherein the method comprises the following steps: in the step (1), the stirring speed of the first stirring and mixing is 400-600 rpm; the first stirring and mixing time is 5-30min or until the center of the liquid level generates vortex.
9. The method for preparing the polyurethane anticorrosive paint for the electric fire-fighting equipment according to claim 7, wherein the method comprises the following steps: the diluent is added in one time in the step (1) or added in multiple times in the steps (1) to (4).
10. The use of the polyurethane anticorrosive paint for electric fire-fighting equipment according to claim 1 in the safety protection of fire-fighting pipelines of electric equipment.
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