CN106280997B - Modified antifouling work composite coating and its manufacturing method - Google Patents

Abstract

The invention discloses a kind of modified antifouling work composite coating and its manufacturing methods.Wherein, this method comprises: obtaining the paint composition for manufacturing modified antifouling work composite coating, wherein paint composition includes fluorine silicone rubber, fumed silica and the compound of resistance to ablation；Paint composition is dissolved using solvent to obtain lysate；Levelling agent is added into lysate and carries out pre-reaction, obtains compound after pre-reaction；And vulcanizing agent is added into compound after pre-reaction, obtain modified antifouling work composite coating.Through the invention, solve that existing antifouling work composite coating cold performance is poor, service life it is shorter the technical issues of.

Description

Improved anti-pollution flashover composite coating and manufacturing method thereof

technical field

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

Background technique

The existing anti-pollution flashover composite coating has excellent anti-pollution flashover performance and is cured at room temperature, which makes it have greater flexibility and versatility in use. The low lifespan in the environment makes it always suitable only for remedial temporary products and not for use as a formal or permanent product.

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

SUMMARY OF THE INVENTION

The embodiments of the present invention provide an improved anti-pollution flashover composite coating and a manufacturing method thereof, so as to at least solve the technical problems of poor cold resistance and short service life of the existing anti-pollution 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-pollution flashover composite coating, comprising: obtaining a coating compound for manufacturing the improved anti-pollution flashover composite coating, wherein the coating compound Including fluorosilicone rubber, fumed silica and ablation-resistant composite; dissolving the coating composite with a solvent to obtain a solution; adding a leveling agent to the solution for pre-reaction to obtain a pre-reacted composite ; and adding a vulcanizing agent to the pre-reacted composite to obtain an improved anti-pollution flashover composite coating.

Further, the vulcanizing agent comprises methyltriethoxysilane, methyltritrioximinosilane and dibutyltin dilaurate, and the vulcanizing agent is 2-6 wt % of the mass of the composite.

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

Further, after adding the vulcanizing agent and the catalyst, the vulcanization time of the pre-reacted composite is 15-30 min.

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 dissolving solution is 80-100s .

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

Further, obtaining the coating composite for manufacturing the improved anti-pollution flashover composite coating comprises: kneading fluorosilicone rubber and fumed fumed silica in a kneader; Alumina and antimony pentoxide are placed in a mixing kettle to prepare an ablation-resistant compound; the ablation-resistant compound is added to a kneader of fluorosilicone rubber and fumed fumed silica, at a temperature of 0.1～ Press banburying under a pressure of 1.0 MPa to obtain the coating composite for manufacturing the improved anti-pollution flashover composite coating.

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

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

Further, the flammability of the anti-pollution flashover composite coating is FV-O grade; the thermal conductivity is 0.185-0.203w/m·k; the tracking resistance and electrical corrosion resistance are TMA4.5; The discharge time is 200s; the low temperature resistance is that the hardness change rate is within 5% after the condition of -60℃ and 100h.

In the embodiment of the present invention, the coating compound obtained for manufacturing the improved anti-pollution flashover composite coating is adopted, wherein the coating compound comprises fluorosilicone rubber, fumed silica and ablation-resistant compound; the coating compound is compounded by a solvent The compound is dissolved to obtain a dissolved solution; a leveling agent is added to the dissolved solution for pre-reaction to obtain a pre-reacted composite; and a vulcanizing agent is added to the pre-reacted composite to obtain an improved anti-pollution flashover composite coating. Coating compound comprising fluorosilicone rubber, fumed silica and ablation resistant compound to make an improved anti-pollution flashover composite coating, the ablation resistant compound makes the coating arc ablation resistant, and fumed silica adds improvement The tensile strength of the improved anti-pollution flashover composite coating is improved, and the fluorosilicone rubber improves the low-temperature characteristics of the improved anti-pollution flashover composite coating, making the coating resistant to arc ablation and can be used in extremely cold environments. The problems of poor cold resistance and short service life of the flashover composite coating increase the service life of the improved anti-pollution flashover composite coating, which also increases the service life of the porcelain insulators coated with the coating.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a flow chart of a method for manufacturing an improved anti-pollution flashover composite coating according to an embodiment of the present invention;

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are 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 creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged 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" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

The embodiment of the present invention provides an improved anti-pollution flashover composite coating. The improved anti-pollution flashover composite coating is formed of an arc ablation resistant material, and has both arc ablation resistance and anti-pollution flashover properties, and at the same time, the improved anti-pollution flashover composite coating also has low temperature resistance properties. The main components of the improved anti-pollution flashover composite coating include: 40-60% fluorosilicone rubber, 10-20% fumed fumed silica, 5-15% polyisocyanurate, 5-15% basalt short fibers, 15-25% aluminum oxide and 10-20% antimony pentoxide.

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

The embodiment of the present invention provides a manufacturing method of an improved anti-pollution flashover composite coating. The manufacturing method of the improved anti-pollution flashover composite coating comprises:

Step S102, 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. The coating compound used to manufacture the improved anti-pollution flashover compound coating in this example includes fluorosilicone rubber, fumed silica and ablation resistant compound. The ablation-resistant composite enables the improved anti-pollution flashover composite coating produced by the coating composite to have ablation resistance characteristics, and the fluorosilicone rubber enables the improved anti-pollution flashover composite coating to have better cold resistance characteristics. Fumed silica can improve the abrasion resistance, tensile strength and tear resistance of the improved anti-pollution flashover composite coating.

Step S104, dissolving the coating compound with a solvent to obtain a dissolving solution.

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

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

The coating compound is dissolved with a solvent to obtain a solution, a leveling agent is added to the solution to increase the uniformity and stability of the coating during spraying, and then a vulcanizing agent is added to the pre-reacted compound. Since the fluorosilicone rubber is a linear macromolecule of straight chain, the vulcanizing agent is added to form a network structure through cross-linking reaction, that is, the vulcanization becomes a rubber coating, and the improved anti-pollution flashover composite coating of this embodiment is obtained.

Through this embodiment, an improved anti-pollution flashover composite coating is manufactured by using a coating compound comprising fluorosilicone rubber, fumed silica and ablation-resistant composite, the ablation-resistant composite enables the coating to have arc ablation resistance characteristics, and the gas phase Silica increases the tensile strength of the improved anti-pollution flashover composite coating, and fluorosilicone rubber improves the low-temperature properties of the improved anti-pollution flashover composite coating, making the coating resistant to arc ablation and can be used in extremely cold environments. The problems of poor cold resistance and short service life of the existing anti-pollution flashover composite coating are 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 brominated cyclohexane, the mass ratio of the complex to brominated cyclohexane is 100:N, N is 85-95, and the viscosity of the dissolving solution is 80-100s.

The stability and viscosity of a variety of different solvents can be tested before selecting the solvent. Under the premise of considering environmental protection factors, the ones with high solubility, low solution viscosity, no reaction with the mixture base material, and good storage stability are selected. solvent, and the test results are shown in Table 1.

Table 1

solvent Material-to-Soluble 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

Take three parts of the coating compound for the manufacture of the improved anti-pollution flashover composite coating, the coating compound is a paste, and add solvent A, solvent B and solvent C to the three pastes respectively, and the corresponding materials are dissolved in such as As shown in Table 1, details are not repeated here. After adding the solvent, three pastes formed a solution. Comparing the dissolved state of the dissolving solution after adding the three solvents, it is completely dissolved, solvent A and solvent B have better stability, and solvent A has lower viscosity. Solvent A is cyclohexane bromide. Therefore, brominated cyclohexane and the corresponding ratio of material to solvent were selected to manufacture the improved anti-pollution flashover composite coating in this example.

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

Before selecting the leveling agent, take the prepared coating liquid with different leveling agents and solutions without 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 not thickened H 0.5～3% good excellent 30d lightly thickened none — Difference Difference 30d not thickened

The leveling agent is used to change the leveling, prevent the coating from accumulating and shrinkage, and increase the flatness 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, the leveling property and sprayability of the dissolving solution 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 helps the coating uniformity and coating stability of spraying or brushing. The G series is the polyether-modified siloxane of this embodiment.

Optionally, the pre-reacted composite obtained by adding a vulcanizing agent and then adding a leveling agent forms an arc ablation-resistant anti-pollution flashover composite coating, that is, the improved anti-pollution flashover composite coating of this embodiment. The vulcanizing agent of this embodiment includes methyltriethoxysilane, methyltritrioximinosilane, and dibutyltin dilaurate. Optionally, in order to speed up the vulcanization, the method further includes adding a catalyst to the pre-reacted composite. 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 pre-reacted composite is 15-30 min.

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

table 3

Vulcanization system catalyst Dosage Vulcanization time Storage stability D + 1～5% 40～50min 30d not thickened E — 3～8% 15～30min 30d lightly thickened F + 2～6% 15～30min 30d not thickened

As shown in Table 3, the dissolving solution after adding the leveling agent was taken, and different vulcanization systems were added to three parts of the dissolving solution according to different ratios, and the vulcanization system D and the vulcanization system F adopted the same catalyst. It can be seen from Table 3 that the vulcanization system D and the vulcanization system F have better stability. The vulcanizing agent is selected according to the vulcanization rate (time) and the storage stability of the composite under the same conditions of use. 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, vulcanization system F was selected as the vulcanization system used in this example, namely methyltriethoxysilane, methyltritrioximinosilane and dibutyltin dilaurate. Among them, the vulcanization system includes a vulcanizing agent and a catalyst.

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

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

In step S2, an ablation-resistant composite is prepared in a mixing kettle with polyisocyanurate, short basalt fibers, aluminum oxide and antimony pentoxide.

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

After the above coating compound is obtained, the coating compound used to manufacture the improved anti-pollution flashover compound coating is placed in a drying oven at 100-120°C, and subjected to vacuum drying and heat treatment at a vacuum degree of -0.08--0.1MPa for 1-2 hours. .

The dried coating composite is prepared by adding the above-mentioned reagents determined through experiments to obtain an improved anti-pollution flashover composite coating, that is, an arc ablation resistant anti-pollution flashover composite coating.

Specifically, after the coating compound is obtained, the solvent brominated cyclohexane is added to the coating compound according to the material-to-solvent ratio 100:85-95 corresponding to the solvent A in Table 1 to obtain a solution. According to the leveling agent G in Table 2, 0.5-2 wt% of the leveling agent polyether-modified siloxane was added to the dissolving solution. After 1-3 hours of pre-reaction for the dissolving solution added with the leveling agent, 2 to 6 wt % of vulcanization system F in Table 3, including methyltriethoxysilane, methyl The vulcanization system of tripropyl oxime silane and dibutyltin dilaurate obtains the arc ablation and pollution flashover resistant composite coating after vulcanization time of 15-30min.

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

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

(2) The low temperature resistance (-55℃) and arc ablation resistance have been verified by the test, and the low temperature resistance has passed the test of hanging net;

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

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

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

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

(2) Thickness: between 0.5~5.0mm, optional;

(3) Adhesion (circle method): not less than grade 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) Resistance to tracking and electrical corrosion: not less than TMA4.5 (AC);

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

(9) Mechanical breaking 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) Wear 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 grade 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: the hardness change rate is less than 10% after the condition of -60℃ and 100h;

(16) The flammability is FV-O grade;

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

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

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

In the above-mentioned embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. a manufacture method of improved anti-pollution flashover composite coating, is characterized in that, comprises: Obtaining a coating composite for the manufacture of an improved anti-pollution flashover composite coating, wherein the coating composite includes fluorosilicone rubber, fumed silica, and an ablation-resistant composite; Utilize a solvent to dissolve the coating compound to obtain a dissolving solution; Adding a leveling agent to the lysate to carry out a pre-reaction to obtain a pre-reacted composite; and adding a vulcanizing agent to the pre-reacted composite to obtain an improved anti-pollution flashover composite coating; Coating compounds obtained for the manufacture of improved antifouling flashover composite coatings include: Kneading fluorosilicone rubber and fumed silica in a kneader; Put polyisocyanurate, basalt short fiber, aluminum oxide and antimony pentoxide in a mixing kettle to prepare an ablation-resistant composite; The ablation-resistant compound is added into a kneader of fluorosilicone rubber and fumed silica, and press-mixed under a pressure of 0.1-1.0 MPa to obtain the compound used for manufacturing the improved anti-pollution flashover coating. Coating Compounds. 2 . The method according to claim 1 , wherein the vulcanizing agent comprises methyltriethoxysilane, methyltritrioximinosilane and dibutyltin dilaurate. 3 . 3. The method according to claim 1 or 2, wherein the method further comprises: adding a catalyst to the pre-reacted composite. The method according to claim 3, characterized in that, after adding the vulcanizing agent and the catalyst, the vulcanization time of the pre-reacted composite is 15-30 min, and the vulcanization time of the vulcanizing agent and the catalyst is 15-30 min. The total mass is 2-6 wt% of the pre-reacted composite mass. 5 . The method according to claim 1 , wherein the leveling agent is polyether-modified siloxane, and the polyether-modified siloxane is 0.5-2 wt % of the mass of the coating compound. 6 . . 6. method according to claim 1, is characterized in that, described solvent is bromide cyclohexane, the mass ratio of described coating compound and described bromide cyclohexane is 100:N, and N is 85～ 95. The viscosity of the dissolving solution is 80-100 Pa.s. 7 . The method according to claim 1 , wherein the time for adding a leveling agent to the dissolving solution for pre-reaction is 1-3 hours. 8 . 8 . The method according to claim 1 , wherein the coating compound for manufacturing the improved anti-pollution flashover compound coating is subjected to a vacuum degree of -0.08 to -0.1 MPa in a drying oven at 100 to 120° C. 9 . Vacuum drying heat treatment for 1-2h. 9. An improved anti-pollution flashover composite coating, characterized in that it comprises: 40% fluorosilicone rubber, 10-20% fumed silica, 5-15% polyisocyanurate, 5-15% % of basalt short fibers, 15-25% of aluminum trioxide and 10-20% of antimony pentoxide, wherein, the improved anti-pollution flashover composite coating is made of the coating compound, and is obtained for the manufacture of improved anti-pollution flashover The coating compound of the composite coating includes: kneading fluorosilicone rubber and fumed silica in a kneader; placing polyisocyanurate, basalt short fiber, aluminum oxide and antimony pentoxide in a mixing kettle It is formulated into an ablation-resistant compound; the ablation-resistant compound is added into a kneader of fluorosilicone rubber and fumed silica, and press-mixed under a pressure of 0.1-1.0 MPa to obtain the Coating compound for improved antifouling flashover compound coating. 10 . The anti-pollution flashover composite coating according to claim 9 , wherein the flammability of the anti-pollution flashover composite coating is FV-0; the thermal conductivity is 0.185-0.203 w/m·k; The trace and electrical corrosion resistance is TMA4.5; the resistance to small current arc discharge is 200s;