CN106280997A - Modified model antifouling work composite coating and manufacture method thereof - Google Patents

Abstract

The invention discloses an improved antifouling flash composite coating and a manufacturing method thereof. Wherein, the method includes: obtaining a coating compound for manufacturing an improved anti-pollution flashover composite coating, wherein the coating compound includes fluorosilicone rubber, fumed silica and an ablation-resistant compound; Dissolving to obtain a solution; adding a leveling agent to the solution for pre-reaction to obtain a pre-reacted compound; and adding a vulcanizing agent to the pre-reacted compound to obtain an improved anti-fouling flash composite coating. The invention solves the technical problems of poor cold resistance and short service life of the existing anti-pollution flashover composite paint.

Description

Improved antifouling flashover composite paint and manufacturing method thereof

technical field

The invention relates to the field of materials, in particular to an improved antifouling flashover composite coating and a manufacturing method thereof.

Background technique

The existing anti-fouling flashover composite coating has excellent anti-fouling flashover performance and the characteristics of curing at room temperature make it more flexible and versatile in use, but this kind of anti-fouling flashover composite coating has poor environmental adaptability The low ambient life makes it always suitable only for remedial temporary products, not as formal or permanent products.

For the above problems, no effective solution has been proposed yet.

Contents of the invention

The embodiments of the present invention provide an improved anti-fouling flashover composite coating and its manufacturing method, so as to at least solve the technical problems of poor cold resistance and short service life of the existing anti-fouling flashover composite coating.

According to an aspect of the embodiments of the present invention, there is also provided a method for manufacturing an improved anti-fouling flashover composite paint, comprising: obtaining a paint compound for manufacturing an improved anti-fouling flashover composite paint, wherein the paint compound Including fluorosilicone rubber, fumed silica and ablation-resistant compound; using a solvent to dissolve the coating compound to obtain a solution; adding a leveling agent to the solution for pre-reaction to obtain a compound after pre-reaction and adding a vulcanizing agent to the compound after the pre-reaction to obtain an improved antifouling flashover composite coating.

Further, the vulcanizing agent includes methyltriethoxysilane, methyltriacioximosilane and dibutyltin dilaurate, and the vulcanizing agent is 2-6wt% of the weight of the compound.

Further, the method further includes: adding a catalyst to the pre-reacted compound.

Further, after adding the vulcanizing agent and the catalyst, the vulcanization time of the compound after the pre-reaction is 15-30 minutes.

Further, the leveling agent is polyether-modified siloxane, and the polyether-modified siloxane is 0.5-2 wt% of the mass of the coating compound.

Further, the solvent is cyclohexane bromide, the mass ratio of the coating compound to the cyclohexane bromide is 100:N, N is 85-95, and the viscosity of the solution is 80-100s .

Further, the time for adding a leveling agent to the solution for pre-reaction is 1-3 hours.

Further, obtaining the coating compound used to manufacture the improved antifouling flashover composite coating includes: kneading fluorosilicone rubber and fumed fumed silica in a kneader; mixing polyisocyanurate, basalt short fiber, three Aluminum oxide and antimony pentoxide are placed in a mixing tank to prepare an ablation-resistant compound; the ablation-resistant compound is added to a kneader of fluorosilicone rubber and gas-phase method fumed silica, at 0.1- Under the pressure of 1.0 MPa, pressurized banburying was carried out to obtain the coating compound for manufacturing the improved anti-pollution flashover composite coating.

Further, the coating compound used for manufacturing the improved anti-fouling flashover composite coating is subjected to vacuum drying and heat treatment at a vacuum degree of -0.08-0.1 MPa for 1-2 hours in a drying oven at 100-120°C.

According to another aspect of the embodiments of the present invention, an improved anti-fouling flashover composite coating is provided, comprising: 40-60% fluorosilicone rubber, 10-20% fumed silica, 5-15% Polyisocyanurate, 5-15% short basalt fiber, 15-25% aluminum oxide and 10-20% antimony pentoxide.

Further, the flammability of the anti-fouling flashover composite coating is FV-O level; the thermal conductivity is 0.185-0.203w/m·k; the resistance to tracking and electric erosion is TMA4.5 level; the resistance to small current arc The discharge time is 200s; the low temperature resistance is that after the condition of -60℃ and 100h, the change rate of hardness is within 5%.

In the embodiment of the present invention, the coating compound used to manufacture the improved antifouling flashover composite coating is obtained, wherein the coating compound includes fluorosilicone rubber, fumed silica and ablation-resistant compound; Dissolve the substance to obtain a solution; add a leveling agent to the solution for pre-reaction to obtain a pre-reacted compound; and add a vulcanizing agent to the pre-reacted compound to obtain an improved anti-fouling flash composite coating. Coating compound including fluorosilicone rubber, fumed silica and ablation-resistant compound to create an improved anti-fouling flashover compound coating, the ablation-resistant compound makes the coating resistant to arc ablation, and fumed silica adds improvement The tensile strength of the type antifouling flashover composite coating, fluorosilicone rubber improves the low temperature characteristics of the improved antifouling flashover composite coating, making the coating resistant to arc ablation and can be used in extremely cold environments, which solves the existing antifouling The problem of poor cold resistance and short service life of the flash composite coating improves the service life of the improved anti-fouling flash composite coating, and also increases the service life of the porcelain insulator coated with the coating.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the flow chart of the manufacturing method of a kind of improved antifouling flashover composite paint according to the embodiment of the present invention;

detailed description

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The embodiment of the invention provides an improved antifouling flashover composite paint. The improved anti-pollution flashover composite coating is formed of arc ablation-resistant materials, and has both arc ablation resistance and anti-fouling flashover characteristics. At the same time, the improved anti-pollution flashover composite coating also has low temperature resistance. The main components of the improved antifouling flashover composite coating include: 40-60% fluorosilicone rubber, 10-20% fumed silica, 5-15% polyisocyanurate, 5-15% Basalt short fiber, 15-25% aluminum oxide and 10-20% antimony pentoxide.

Specifically, the flammability of the improved anti-fouling flashover composite coating is FV-O level; the thermal conductivity is 0.185-0.203w/m·k; the resistance to tracking and electric erosion is TMA4.5 level; The arc discharge time is 200s; the low temperature resistance is that after -60℃, 100h, the change rate of hardness is within 5%.

The embodiment of the present invention provides a method for manufacturing an improved antifouling flashover composite paint. The manufacturing method of the improved antifouling flashover composite coating comprises:

Step S102, obtaining a paint compound for manufacturing an improved anti-fouling flashover composite paint, wherein the paint compound includes fluorosilicone rubber, fumed silica and ablation-resistant compound. The coating compound used to manufacture the improved anti-fouling flashover composite coating in this example includes fluorosilicone rubber, fumed silica and ablation-resistant compound. The ablation-resistant compound makes the improved anti-fouling flashover composite coating manufactured by the coating compound have ablation-resistant characteristics, and the fluorosilicone rubber can make the improved anti-fouling flashover composite coating have better cold resistance characteristics. Fumed silica can improve the abrasion resistance, tensile strength and tear resistance of the improved antifouling flashover composite coating.

Step S104, using a solvent to dissolve the coating compound to obtain a solution.

Step S106, adding a leveling agent to the solution for pre-reaction to obtain a pre-reaction compound.

Step S108, adding a vulcanizing agent to the pre-reacted composite to obtain an improved antifouling flashover composite coating.

A solvent is used to dissolve the paint compound to obtain a solution, a leveling agent is added to the solution to increase the uniformity and stability of the paint during spraying, and then a vulcanizing agent is added to the compound after the pre-reaction. Since the fluorosilicone rubber is a straight-chain linear macromolecule, adding a vulcanizing agent will form a network structure through cross-linking reaction, that is, vulcanize to form a rubber coating, and the improved antifouling flashover composite coating of this embodiment is obtained.

Through this example, an improved antifouling flashover composite coating is manufactured by using a coating compound including fluorosilicone rubber, fumed silica and an ablation-resistant compound. The ablation-resistant compound makes the coating resistant to arc ablation, and the gas phase Silica increases the tensile strength of the improved anti-fouling flashover composite coating, and fluorosilicone rubber improves the low-temperature characteristics of the improved anti-fouling flashover composite coating, which makes the coating resistant to arc ablation and can be used in extremely cold environments. The problem of poor cold resistance and short service life of the existing anti-pollution flashover composite coating is solved, the service life of the improved anti-pollution flashover composite coating is improved, and the service life of the porcelain insulator coated with the coating is also provided.

Optionally, the solvent is cyclohexane bromide, the mass ratio of the compound to cyclohexane bromide is 100:N, N is 85-95, and the viscosity of the solution is 80-100s.

Before choosing a solvent, you can test the stability and viscosity of various solvents. On the premise of considering environmental protection factors, select the one with the advantages of high solubility, low solution viscosity, no reaction with the mixture base material, and good storage stability. solvent, and the test results are shown in Table 1.

Table 1

solvent Material to solution ratio (weight) dissolved state viscosity storage stability Remark A 100:85～95 Fully soluble 80～100s 7d not precipitated B 100:70～80 Fully soluble 105～120s 7d not precipitated C 100:75～85 Fully soluble 130～150s 7d mild precipitation

Get three parts of the paint compound used to make the improved anti-fouling flashover composite coating, the paint compound is a paste, add solvent A, solvent B and solvent C to the three parts of paste, the corresponding material solution such as shown in Table 1 and will not be repeated here. After addition of solvent, three pastes formed solutions. Comparing the dissolution state of the solution after adding the three solvents is complete dissolution, solvent A and solvent B are better in stability, and solvent A is lower in viscosity. Solvent A is cyclohexane bromide. Therefore, cyclohexane bromide and the corresponding material-to-solubility ratio were selected to manufacture the improved antifouling flashover composite coating in this example.

Optionally, in order to contribute to the coating uniformity and paint stability of the spraying or brushing of the paint, a leveling agent is added to the solution dissolved in cyclohexane bromide, and the leveling agent is polyether modified silicon Oxane, polyether modified siloxane is 0.5-2wt% of the mass of the coating compound.

Before selecting the leveling agent, take the prepared coating solution with different leveling agents and without adding leveling agent, add different leveling agents, and spray with different types of spray guns on the automatic spraying device to get the test The results are shown in Table 2.

Table 2

Type of leveling agent Dosage Leveling Sprayability storage stability G 0.5～2% excellent excellent 30d unthickened h 0.5～3% good excellent 30d mildly thickened none — Difference Difference 30d unthickened

The leveling agent is used to change the leveling property, prevent coating accumulation and shrinkage, and increase the smoothness and gloss of the coating, especially for thick coatings. Excellent leveling can meet a wider range of coating equipment and process conditions. According to Table 2, it can be seen that the leveling and sprayability of the solution added with leveling agent are better than those without adding leveling agent, and the leveling property of G series leveling agent is better than that of H series leveling agent , the selection of G series leveling agent will help the coating uniformity and coating stability of spraying or brushing. G series is the polyether modified siloxane of this embodiment.

Optionally, adding the vulcanizing agent and then adding the leveling agent results in a pre-reacted compound to form an arc ablation-resistant anti-fouling flashover composite coating, that is, the improved anti-fouling flashover composite coating of this embodiment. The vulcanizing agent in this embodiment includes methyltriethoxysilane, methyltriacioximosilane and dibutyltin dilaurate. Optionally, in order to accelerate the vulcanization rate, the method further includes adding a catalyst to the pre-reacted compound. The total mass of vulcanizing agent and catalyst is 2-6wt% of the composite mass after pre-reflection

Optionally, after adding the vulcanizing agent and the catalyst, the vulcanization time of the compound after the pre-reaction is 15-30 minutes.

Before choosing to manufacture arc ablation-resistant antifouling flashover composite coatings, a selection test was carried out on vulcanizing agents. The test results are shown in Table 3.

table 3

vulcanization system catalyst Dosage vulcanization time storage stability D. + 1～5% 40～50min 30d unthickened E. — 3～8% 15～30min 30d mildly thickened f + 2～6% 15～30min 30d unthickened

As shown in Table 3, take the solution after adding the leveling agent, add different vulcanization systems to three parts of the solution according to different proportions, and use the same catalyst for vulcanization system D and vulcanization system F. It can be seen from Table 3 that vulcanization system D and vulcanization system F have better stability. The vulcanizing agent is selected according to the vulcanization speed (time) and the storage stability of the compound under the same service conditions. It can be seen from Table 3 that the vulcanization time of vulcanization system F and vulcanization system D is shorter than that of vulcanization system F. Therefore, the vulcanization system F was selected as the vulcanization system used in this embodiment, that is, methyltriethoxysilane, methyltriacioximosilane and dibutyltin dilaurate. Wherein, the vulcanization system includes a vulcanization agent and a catalyst.

Specifically, the coating compound used to manufacture the improved anti-pollution flashover composite coating can adopt the following steps:

Step S1, kneading fluorosilicone rubber and fumed silica in a kneader.

Step S2, preparing an ablation-resistant compound with polyisocyanurate, short basalt fibers, aluminum oxide and antimony pentoxide in a mixing tank.

Step S3, adding the ablation-resistant compound into the kneader of fluorosilicone rubber and fumed fumed silica, and performing pressurized banburying under a pressure of 0.1-1.0 MPa to obtain an improved anti-pollution flashover composite coating coating compound.

After obtaining the above-mentioned coating compound, put the coating compound used to manufacture the improved anti-fouling flashover composite coating in a drying oven at 100-120°C, and undergo vacuum drying and heat treatment at a vacuum degree of -0.08-0.1MPa for 1-2 hours .

The dried coating compound is added with the above-mentioned reagents determined through experiments to obtain an improved anti-fouling flashover composite coating, that is, an arc-ablation-resistant anti-fouling flashover composite coating.

Specifically, after obtaining the coating compound, add the solvent cyclohexane bromide to the coating compound according to the material-to-solution ratio corresponding to solvent A in Table 1 of 100:85-95 to obtain a solution. According to leveling agent G in Table 2, 0.5-2 wt% of leveling agent polyether-modified siloxane was added to the solution. After 1-3 hours of pre-reaction to the solution of the leveling agent, add 2-6 wt% of the vulcanization system F in Table 3 to the compound after the pre-reaction, including methyltriethoxysilane, methyl The vulcanization system of triacioxime silane and dibutyltin dilaurate can obtain arc ablation and antifouling flashover composite coatings after a vulcanization time of 15 to 30 minutes.

The coating obtained by the manufacturing method of the anti-arc ablation anti-pollution flashover composite coating provided by this embodiment has the following characteristics:

(1) It is suitable for operation under extremely cold conditions (-55°C), and the arc discharge time of small current is 200s;

(2) The low temperature resistance (-55°C) and arc ablation resistance have passed the test verification, and the low temperature resistance has passed the hanging net test;

(3) It has excellent insulation and anti-pollution flashover properties of the anti-pollution flashover composite coating.

The arc-ablation-resistant and anti-fouling flashover composite coating provided by the embodiments of the present invention has excellent insulation and anti-fouling flashover properties, and can also be used under extremely cold conditions, and is resistant to arc ablation, which solves the existing problem of anti-fouling The problems of poor cold resistance and short service life of the pollution flashover composite coating improve the service life of the improved anti-pollution flashover composite coating, which also improves the service life of the porcelain insulator coated with the coating.

Further, the arc-ablation-resistant and anti-pollution flashover composite coating also has the following characteristics:

(1) Appearance: flat, smooth, brownish-red or gray elastomer;

(2) Thickness: optional between 0.5 and 5.0mm;

(3) Adhesion (circle method): no less than level 2;

(4) Volume resistivity: not less than 1×1012Ω·m;

(5) Breakdown strength: not less than 20kV/mm;

(6) Relative permittivity: not more than 4.0, dielectric loss tangent: not more than 0.4%;

(7) Tracking resistance and electrical corrosion resistance: not less than TMA4.5 (AC);

(8) Hydrophobicity: HC1～HC2, Qav>100°, Qmin>90°; hydrophobicity weakening characteristic Qav>90°, Qmin>85°, HC3～HC4 after soaking for 96 hours; hydrophobicity recovery characteristic t≤24h; Water Migration Characteristics Qav≥110°, Qmin≥100°, HC2～HC3 after 96 hours of artificial pollution.

(9) Mechanical tear strength: not less than 4.0MPa; elongation at break: not less than 200%;

(10) The tensile shear strength after bonding is not less than 3.0MPa;

(11) The tear strength is not less than 9.0kN/m;

(12) Abrasion resistance is not more than 0.3g;

(13) Corrosion resistance: under the medium of acid, alkali, salt and transformer oil, the coating has no wrinkling, peeling, blistering, etc., and the adhesion is not lower than level 2;

(14) When the ESDD and NSDD are 0.1mg/cm2 and 0.5mg/cm2, the ratio U1/U2 of the pollution flashover voltage U1 of the coated insulator to the pollution flashover voltage U2 of the uncoated insulator shall not be less than 2.0 (solid layer method );

(15) Low temperature resistance: after -60°C and 100h, the change rate of hardness is less than 10%;

(16) The flammability is FV-O level;

(17) Thermal conductivity: less than 0.25w/m·k;

(18) The arc discharge time of small current resistance is 200s.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present invention, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (11)

1. the manufacture method of a modified model antifouling work composite coating, it is characterised in that including:

Obtain the paint composition for manufacturing modified model antifouling work composite coating, wherein, described paint composition Including fluorosioloxane rubber, aerosil and the complex of resistance to ablation；

Utilize solvent that described paint composition is carried out dissolving and obtain lysate；

In described lysate, add levelling agent carry out pre-reaction, obtain complex after pre-reaction；And

Complex adds after described pre-reaction vulcanizing agent, obtains modified model antifouling work composite coating.

Method the most according to claim 1, it is characterised in that described vulcanizing agent include MTES, Methyl 3 third oximino silane and dibutyl tin laurate.

Method the most according to claim 1 and 2, it is characterised in that described method also includes: to described pre-reaction Rear complex adds catalyst.

Method the most according to claim 3, it is characterised in that after adding described vulcanizing agent and described catalyst, institute After stating pre-reaction, the cure time of complex is 15～30min, described vulcanizing agent and the gross mass of described catalyst It is the 2～6wt% of described complex quality.

Method the most according to claim 1, it is characterised in that described levelling agent is polyether modified siloxane, described Polyether modified siloxane is the 0.5～2wt% of described paint composition quality.

Method the most according to claim 1, it is characterised in that described solvent is brominated hexane, described coating is multiple The mass ratio of compound and described brominated hexane be 100:N, N be 85～95, the viscosity of described lysate is 80～100s.

Method the most according to claim 1, it is characterised in that in described lysate add levelling agent carry out pre-instead The time answered is 1～3h.

Method the most according to claim 1, it is characterised in that obtain and be used for manufacturing modified model antifouling work composite coating Paint composition include:

Fluorosioloxane rubber and vapor phase method aerosil are mediated in kneader；

Poly-isocyanurate, short basalt fiber, aluminium sesquioxide and antimony pentoxide are placed in mixing kettle and join Make the complex of resistance to ablation；

The described complex of resistance to ablation is joined in the kneader of fluorosioloxane rubber and vapor phase method aerosil, Carry out banburying of pressurizeing under 0.1～1.0MPa pressure, obtain described for manufacturing the painting of modified model antifouling work composite coating Material complex.

Method the most according to claim 8, it is characterised in that described for manufacturing modified model antifouling work composite coating Paint composition in the drying baker of 100～120 DEG C, at the vacuum drying heat of vacuum-0.08～-0.1MPa Reason 1～2h.

10. a modified model antifouling work composite coating, it is characterised in that including: 40～the fluorosioloxane rubber of 60%, 10～20% Vapor phase method aerosil, 5～the poly-isocyanurate of 15%, 5～the short basalt fiber of 15%, 15～25% Aluminium sesquioxide and 10～the antimony pentoxide of 20%.

11. antifouling work composite coatings according to claim 10, it is characterised in that described antifouling work composite coating can Combustion property is FV-O level；Heat conductivity is 0.185～0.203w/m k；Accelerated aging test is TMA4.5 level；The arc discharge of the resistance to small area analysis time is 200s；Lower temperature resistance be through-60 DEG C, after 100h condition, Firmness change rate is within 5%.