CN111073298A - Flame-retardant plugging agent for substation and preparation method and use method thereof - Google Patents

Flame-retardant plugging agent for substation and preparation method and use method thereof Download PDF

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CN111073298A
CN111073298A CN201911173898.1A CN201911173898A CN111073298A CN 111073298 A CN111073298 A CN 111073298A CN 201911173898 A CN201911173898 A CN 201911173898A CN 111073298 A CN111073298 A CN 111073298A
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flame
parts
retardant
component
plugging agent
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王猛
谭明甜
雷云飞
李佐胜
刘旭辉
屠振宇
王彪
左煜
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Maintenance Co of State Grid Hunan Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Maintenance Co of State Grid Hunan Electric Power Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/22—Halogen free composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical Kinetics & Catalysis (AREA)
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  • Fireproofing Substances (AREA)

Abstract

The invention provides a flame-retardant plugging agent for a substation, and a preparation method and a use method thereof, wherein the flame-retardant plugging agent consists of A, B components in a mass ratio of 4-6: 1, and the A component is prepared from the following components in parts by weight: 100 parts of vinyl silicone resin, 75-110 parts of flame-retardant filler and 0.1-6 parts of platinum catalyst; the component B is prepared from the following components in parts by weight: 20-60 parts of vinyl silicone resin, 40-80 parts of hydrogen-containing silicone resin, 0.5-5 parts of tackifier and 0.01-2 parts of inhibitor. The flame-retardant plugging agent is liquid before curing, has good fluidity and plasticity, has good toughness, excellent fire-resistant flame-retardant property, aging resistance and other properties after curing, has the flame-retardant grade reaching UL-94V0 grade, has excellent plugging effect on various complex working conditions and complex shapes, and has attractive and smooth appearance.

Description

Flame-retardant plugging agent for substation and preparation method and use method thereof
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to a flame-retardant plugging agent for a substation, and a preparation method and a use method thereof.
Background
In modern industrial production and social life, the transformer substation plays a very important role, and the fire protection system is one of very critical links in the safe operation of the transformer substation. Along with the development of times and the progress of society, a higher level has been mentioned in safety production, and the traditional plugging material mainly composed of fireproof gypsum boards, fireproof daub, fireproof bags (bags), fireproof coatings and the like has many defects, the reliability is especially in the aspects of service life, maintainability, reusability, attractiveness, rat bite prevention, weather resistance and the like, the traditional fireproof material has more and more limitations and has a tendency of being gradually eliminated, and the requirement of modern safety production cannot be met.
The organic polymer fireproof plugging material has the advantages of long operable time period, good plasticity, capability of plugging the sealing of difficult (such as complex shape, complex environment and the like) in the construction of engineering, good fireproof performance, good water plugging performance and good air tightness. Patent CN 109370136a discloses a fire-proof plugging material solidified in air, which is prepared by mixing the following raw materials: 33% -37% of ethyl cyanoacrylate, 4% -8% of expanded graphite, 25% -30% of nitrogen phosphorus Pengpo flame retardant, 18% -24% of dipentane vulcanizing agent and 10% -14% of paraffin oil, wherein the fireproof plugging material is liquid, can fully fill holes and cable cross gaps, is high in curing speed, stable in form after curing, does not melt and flow when meeting high temperature, and does not crack at low temperature, but the material is very high in hardness after curing, so that the penetration piece is inconvenient to construct when replacing or adding the penetration piece and is easy to damage the penetration piece.
Patent CN 108504282A discloses a formula and a preparation method of a nano moisture-proof flame-retardant plugging agent, which is prepared from the following components: 50-60 kg of 107-5000cps viscosity agent, 380-390 kg of 10000cps viscosity agent, 120-180 kg of silicone oil, 45-55 kg of active heavy calcium, 90-110 kg of nano calcium carbonate, 140-160 kg of aluminum hydroxide, 230-250 kg of antimony trioxide, 10-20 kg of nano white carbon black, 160-180 kg of JT-316A curing agent, 15-16 kg of 550 coupling agent, 4-5 kg of 560 coupling agent, 2-4 kg of 801 toughening agent, 5-6 kg of dibutyltin dilaurate and 1-2 kg of catalyst. The formula and the preparation method of the moistureproof and insulating nano moistureproof and flame-retardant plugging agent are provided, but a material product prepared by the technology has very high viscosity and poor leveling property, a terminal box of a substation has a large area under many conditions, the requirement on the flowability of the plugging material is very high, and otherwise, the leveling property is difficult, the appearance is not attractive, and fine gaps cannot permeate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a flame-retardant plugging material which is liquid before curing, has good fluidity and plasticity, has good toughness (easy repair), excellent fire-resistant flame-retardant performance (halogen-free flame-retardant performance) and aging resistance after curing, and is used for a substation, a preparation method and a use method.
In order to solve the technical problems, the invention adopts the following technical scheme.
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 4-6: 1, wherein the A component is prepared from the following components in parts by weight: 100 parts of vinyl silicone resin, 75-110 parts of flame-retardant filler and 0.1-6 parts of platinum catalyst; the component B is prepared from the following components in parts by weight: 20-60 parts of vinyl silicone resin, 40-80 parts of hydrogen-containing silicone resin, 0.5-5 parts of tackifier and 0.01-2 parts of inhibitor.
Preferably, the vinyl silicone resin is CH, the flame retardant plugging agent for the substation is prepared by mixing vinyl silicone resin, vinyl silicone resin and vinyl silicone resin2＝CHSi(CH3)2O[(CH3)2SiO1/2]n(CH3)2SiCH＝CH2Preferably, the viscosity is 280 to 310 mPas.
Preferably, the flame-retardant filler is compounded by activated aluminum hydroxide and melamine; the total amount is preferably 80 to 110 parts, and more preferably 80 to 100 parts.
The amount of the melamine is 20-60 parts, and the amount of the active aluminum hydroxide is 30-70 parts; preferably, the amount of the melamine is 25-45 parts, and the amount of the active aluminum hydroxide is 45-65 parts; further preferably, the flame-retardant filler comprises 30-45 parts of melamine and 45-60 parts of active aluminum hydroxide.
Preferably, the platinum catalyst is a coordination compound of platinum or a chelate compound of platinum.
Preferably, the above flame-retardant plugging agent for electric power substations is (CH) as the hydrogen-containing silicone resin3)3SiO[(CH3)2SiO1/2]n[(CH3)HSiO1/2]mSi(CH3)3(ii) a Preferably, the mass fraction of active hydrogen is 0.15-0.20 wt%.
The flame retardant plugging agent for the power substation is preferably prepared by using N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane as the tackifier.
Preferably, the inhibitor is ethynyl cyclohexanol.
As a general inventive concept, the invention also discloses a preparation method of the flame-retardant plugging agent for the substation, which comprises the following steps:
preparation of a component A: adding vinyl silicone resin, active aluminum hydroxide and melamine into a vacuum kneader according to the formula, mixing in vacuum at 110-130 ℃ to obtain a base material, and cooling for later use; taking 100 parts of base stock, adding a catalyst according to the formula, and uniformly stirring by using a variable speed stirrer to obtain a component A;
b, preparation of a component: taking the vinyl silicone resin, the hydrogen-containing silicone resin, the inhibitor and the tackifier according to the formula, and slowly stirring and mixing the vinyl silicone resin, the hydrogen-containing silicone resin, the inhibitor and the tackifier by using a variable speed stirrer to obtain the component B.
In the preparation method of the flame retardant plugging agent for the substation, preferably, in the preparation process of the component A, the vacuum mixing time is 3.8-4.2 hours; the stirring speed is 1200-1700 rpm, and the stirring time is 15-25 min; in the preparation process of the component B, the slow stirring speed is 100-300 rpm, and the time is 8-12 min.
As a general inventive concept, the invention also discloses a use method of the flame-retardant plugging agent for the substation or the flame-retardant plugging agent for the substation prepared by the preparation method, which comprises the following steps: and (3) mixing and stirring the component A and the component B uniformly according to the mass ratio of 4-6: 1, then pouring the mixture into the bottom of a terminal box of a substation, and carrying out self-leveling and curing.
Compared with the prior art, the invention has the advantages that:
the flame-retardant blocking agent is prepared by adopting a special flame-retardant blocking agent formula, and the component A and the component B are liquid before curing and have excellent fluidity and plasticity, so that the operation time is long; the cable has good toughness after being cured, and is easy to repair and remove when the cable needs to be adjusted or increased; the flame-retardant, fireproof and anti-moisture alcohol burner has excellent flame-retardant, fireproof and anti-aging properties, does not contain substances harmful to human bodies such as halogen and asbestos, has low smoke yield and no harmful gas in the combustion process, and can achieve fire-leaving self-extinguishing after an alcohol burner is ignited to achieve UL-94V0 level.
Aiming at the special formula composition of the flame-retardant plugging agent, the special preparation method is adopted, so that the flame-retardant plugging agent can obtain excellent blending effect, and the excellent performance and effect of the flame-retardant plugging agent in subsequent use can be favorably exerted.
Aiming at the problems of plugging dead angles, untight plugging and the like of the conventional fire clay plugging because the cables are irregularly arranged, the novel plugging material disclosed by the invention is adopted, and the material is in a fluid state during construction and can automatically flow into gaps of the cables, so that a good plugging effect can be obtained, the problems of plugging dead angles, difficulty in leveling, incapability of penetrating fine gaps, uneven appearance and the like in the conventional method are solved, the plugging material has an excellent plugging effect on complex working conditions and complex shapes, and the appearance is attractive and smooth after plugging.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 4-6: 1, wherein the A component is prepared from the following components in parts by weight: 100 parts of vinyl silicone resin, 75-110 parts of flame-retardant filler and 0.1-6 parts of platinum catalyst; the component B is prepared from the following components in parts by weight: 20-60 parts of vinyl silicone resin, 40-80 parts of hydrogen-containing silicone resin, 0.5-5 parts of tackifier and 0.01-2 parts of inhibitor.
The vinyl silicone resin is CH2＝CHSi(CH3)2O[(CH3)2SiO1/2]n(CH3)2SiCH＝CH2Preferably, the viscosity is 280 to 310 mPas.
The flame-retardant filler is preferably compounded by active aluminum hydroxide and melamine; the amount of the melamine is 20-60 parts, and the amount of the active aluminum hydroxide is 30-70 parts; considering the flame retardant property, the toughness and the blocking property comprehensively, preferably, the flame retardant filler comprises 25-45 parts of melamine and 45-65 parts of active aluminum hydroxide; further preferably, the flame-retardant filler comprises 30-45 parts of melamine and 45-60 parts of active aluminum hydroxide.
The platinum-gold catalyst is preferably a platinum complex or a platinum chelate.
The hydrogen-containing silicone resin is (CH)3)3SiO[(CH3)2SiO1/2]n[(CH3)HSiO1/2]mSi(CH3)3The mass fraction of active hydrogen is preferably 0.15 to 0.20 wt%.
The tackifier is N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane.
The inhibitor is ethynyl cyclohexanol.
The invention relates to a preparation method of a flame-retardant plugging agent for a substation, which comprises the following steps:
preparation of a component A: adding vinyl silicone resin, active aluminum hydroxide and melamine into a vacuum kneader according to the formula, mixing in vacuum at 110-130 ℃ to obtain a base material, and cooling for later use; taking 100 parts of base stock, adding a catalyst according to the formula, and uniformly stirring by using a variable speed stirrer to obtain a component A;
b, preparation of a component: and (3) taking the vinyl silicone resin, the hydrogen-containing silicone resin, the inhibitor and the tackifier according to the formula, and slowly stirring and mixing the vinyl silicone resin, the hydrogen-containing silicone resin, the inhibitor and the tackifier by using a variable speed stirrer to obtain the component B.
In the preparation process of the component A, the vacuum mixing time is 3.8-4.2 h; the stirring speed is 1200-1700 rpm, and the stirring time is 15-25 min; in the preparation process of the component B, the slow stirring speed is 100-300 rpm, and the time is 8-12 min.
The use method of the flame-retardant plugging agent for the substation comprises the following steps: and (3) mixing and stirring the component A and the component B uniformly according to the mass ratio of 4-6: 1, then pouring the mixture into the bottom of a terminal box of a substation, and carrying out self-leveling and curing.
Example 1
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000041
and B component:
Figure BDA0002289462710000042
the preparation method of the flame retardant plugging agent for the substation comprises the following steps:
preparation of a component A: adding the vinyl silicone resin, the active aluminum hydroxide and the melamine in parts by mass into a vacuum kneader, mixing for 4 hours in vacuum at the temperature of 110-130 ℃, and cooling for later use; taking 190 parts of base stock and 0.8 part of chloroplatinic acid (the platinum content is 4000ppm), and stirring for 20min under the condition of 1500rpm of a variable speed stirrer to obtain a component A;
and B component preparation, namely slowly stirring and mixing vinyl silicone resin, hydrogen-containing silicone resin, ethynylcyclohexanol and N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane in parts by mass in a variable speed stirrer for 10min to obtain the B component.
Example 2
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000051
and B component: same as example 1
The preparation method of the flame retardant plugging agent for the substation of the embodiment is different from the preparation method of the embodiment 1 only in that the mixture ratio of the raw materials is different in the preparation process.
Example 3
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000052
and B component: same as example 1
The preparation method of the flame retardant plugging agent for the substation of the embodiment is different from the preparation method of the embodiment 1 only in that the raw materials and the mixture ratio thereof are different in the preparation process.
The flame retardant plugging agent prepared in the embodiments 1-3 of the present invention is prepared by fully and uniformly mixing A, B components according to the mass ratio of 5: 1, placing the mixture in a vacuum drying oven for vacuum defoamation for 15min, then pouring the mixture into a mold for curing for 24 hours to prepare a test piece, and performing various performance tests, wherein the data are as follows:
TABLE 1 Properties of the flame-retardant blocking agents prepared in examples 1 to 3
Figure BDA0002289462710000053
Figure BDA0002289462710000061
Viscosity: measured by a rotational viscometer according to GB/T2794-1995;
flame retardant property: the test was carried out for 1 burning time t1, 2 burning times t2 and 3 burning times t3, measured according to UL 94.
In examples 1 to 3, A, B, the other components are unchanged, the total amount of melamine and active aluminum hydroxide in the component A is 90 minutes, and the melamine/active aluminum hydroxide compounding ratio has influence on the viscosity, physical properties and flame retardance of the flame retardant plugging agent. As can be seen from the analysis of Table 1, although the flame retardant grades were all V-0, the effects of the post combustion (time t3) were different. As more melamine was added, the time at t3 decreased significantly, but the time at t1 became longer. During early combustion, the flame retardant effect of the active aluminum hydroxide is better, but during later combustion, the flame retardant effect of the melamine is better. The total amount of the melamine and the active aluminum hydroxide in the component A is unchanged, and the tensile strength and the elongation at break of the component A are increased and then reduced along with the increase of the content of the melamine, because the melamine and the active aluminum hydroxide powder can form hydrogen bond action with the silicon resin, a small amount of the materials can supplement a cross-linked network, and the mechanical property of the flame-retardant plugging agent is improved; too much will affect the crosslinked network and the mechanical properties of the blocking agent will be reduced. By comparison, when the mass ratio of melamine to aluminum hydroxide in example 2 is 40: 50, the performance of the prepared organosilicon polymer plugging material is optimal.
Comparative example 1
A flame-retardant plugging agent for a substation is composed of A, B components according to a mass ratio of 5: 1, and A, B components are prepared according to the following weight:
the component A comprises:
Figure BDA0002289462710000062
and B component: same as example 1
The preparation method of the flame-retardant plugging agent for the substation is different from the preparation method of the example 1 only in that the mixture ratio of the raw materials is different in the preparation process.
Example 4
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000063
Figure BDA0002289462710000071
and B component: same as example 1
The preparation method of the flame retardant plugging agent for the substation of the embodiment is different from the preparation method of the embodiment 1 only in that the raw materials and the mixture ratio thereof are different in the preparation process.
Example 5
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000072
and B component: same as example 1
The preparation method of the flame retardant plugging agent for the substation of the embodiment is different from the preparation method of the embodiment 1 only in that the mixture ratio of the raw materials is different in the preparation process.
Comparative example 1, the flame retardant plugging agent prepared in the embodiments 2, 4-5 of the present invention, A, B components were mixed well according to the mass ratio of 5: 1, placed in a vacuum drying oven for vacuum defoamation for 15min, and then poured into a mold for curing for 24 hours to make test pieces, and various performance tests were performed, and the data are as follows:
TABLE 2 Properties of the flame-retardant blocking agents prepared in comparative example 1, examples 2, 4 to 5
viscosity/mPas Flame retardant rating Tensile strength/MPa Elongation at break/% t1/s t2/s t3/s
Comparative example 1 3098 UL-94V1 0.94 76 4 15 32
Example 4 3642 UL-94V0 1.16 85 2 6 13
Example 2 4251 UL-94V0 0.98 83 1 4 9
Example 5 5064 UL-94V0 0.79 74 1 3 6
Viscosity: measured by a rotational viscometer according to GB/T2794-;
flame retardant property: the test was carried out for 1 burning time t1, 2 burning times t2 and 3 burning times t3, measured according to UL 94.
Table 2 shows that the viscosity and flame retardant property of the material continuously increase with the increase of the amount of melamine, and the tensile strength and elongation at break show a tendency of increasing first and then decreasing, as shown in table 2, the properties of the flame retardant plugging agent prepared by changing the amount of melamine in the component a are compared. When the addition amount of the melamine is less, the hydrogen bonds between the melamine and the organic silicon resin can supplement a cross-linked network, and the stress is dispersed when the melamine and the organic silicon resin are subjected to external force, so that the overall mechanical property of the material is improved; when the amount is too large, the inter-segment forces after crosslinking are rather reduced, resulting in a decrease in mechanical properties. Meanwhile, melamine absorbs a large amount of heat to decompose, nitrogen is generated, and the material is promoted to form carbon foam, so that air is effectively isolated; the material is decomposed by heating to generate cyanuric acid, and a carbonization layer is further formed on the surface of the material; the gaseous nitrogen-containing compound decomposed at high temperature can be used as a free radical terminator, thereby playing a role of flame retardance. Under the comprehensive influence of the multiple reactions, the sample wafer can be quickly self-extinguished. However, when the plugging material exceeds 4500 mPas, the fluidity is greatly lowered, and the plugging material cannot flow into fine gaps.
Comparative example 2
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000081
and B component: same as example 1
The preparation method of the flame retardant plugging agent for the substation of the embodiment is different from the preparation method of the embodiment 1 only in that the mixture ratio of the raw materials is different in the preparation process.
Example 6
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000082
and B component: same as example 1
The preparation method of the flame retardant plugging agent for the substation of the embodiment is different from the preparation method of the embodiment 1 only in that the raw materials and the mixture ratio thereof are different in the preparation process.
Example 7
The flame-retardant plugging agent for the substation consists of A, B components in a mass ratio of 5: 1, wherein A, B components are prepared according to the following weight percentage:
the component A comprises:
Figure BDA0002289462710000091
and B component: same as example 1
The preparation method of the flame retardant plugging agent for the substation of the embodiment is different from the preparation method of the embodiment 1 only in that the raw materials and the mixture ratio thereof are different in the preparation process.
Comparative example 2, the flame retardant plugging agent prepared in the invention of the examples 4, 6-7, the A, B components were mixed well according to the mass ratio of 5: 1, placed in a vacuum drying oven for vacuum defoamation for 15min, and then poured into a mold for curing for 24 hours to make test pieces, and various performance tests were performed, and the data are as follows:
TABLE 3 Properties of the flame-retardant blocking agents prepared in comparative example 2, examples 4, 6 to 7
viscosity/mPas Flame retardant rating Tensile strength/MPa Elongation at break/% t1/s t2/s t3/s
Comparative example 2 3246 UL-94V1 1.10 77 5 15 33
Example 4 3642 UL-94V0 1.16 85 2 6 13
Example 6 4032 UL-94V0 1.18 78 1 5 10
Example 7 4561 UL-94V0 1.08 73 0 4 7
Table 3 shows the comparison of the properties of the flame retardant plugging agent prepared by changing the amount of the active aluminum hydroxide in the component a without changing other components, and it can be seen from table 3 that the viscosity and the flame retardancy of the material are increased continuously, and the tensile strength and the elongation at break are increased and then decreased with the increase of the amount of the active aluminum hydroxide. Because the active aluminum hydroxide powder can also form a hydrogen bond effect with the organic silicon resin, less active aluminum hydroxide powder can supplement a cross-linking network, and more active aluminum hydroxide powder can play a role in reaction. In addition, the dehydration endothermic reaction that occurs when the hydroxide is decomposed by heat prevents or slows down the thermal decomposition of the material; the product of thermal decomposition is water vapor, which dilutes the combustible gas, thereby reducing the combustion speed of the decomposition product of the organosilicon high molecular material. The amount of the active aluminum hydroxide added is preferably less than 70 parts in view of practical operation and plugging effect.
In conclusion, the flame retardant effect of early combustion and later combustion is more reasonable through the compatibility of the melamine and the active aluminum hydroxide. The performance of the prepared organic silicon polymer plugging material is optimal when the operating performance (fluidity), the mechanical property and the flame retardant effect in the early and later periods are comprehensively considered and the ratio of melamine to aluminum hydroxide is 40: 50.
Example 8
The method is characterized in that a terminal box of a certain 110 kV LW25-126 type breaker is taken as a test object for plugging, and comprises the following steps:
before plugging, cleaning a target area of the box body, and temporarily blocking holes and gaps at the bottom of the box body;
preparing a flame-retardant plugging agent and plugging: adopting the A and B components prepared in the example 2, fully and uniformly mixing the A, B components according to the mass ratio of 5: 1, and placing the mixture in a vacuum drying oven for vacuum defoamation for 15 min; pouring the prepared flame-retardant plugging agent to the plugging part of the box body; and after the plugging agent automatically levels and is solidified.
Aiming at the problems of plugging dead angles, untight plugging and the like of the conventional fire clay plugging because the cables are irregularly arranged, the novel plugging material disclosed by the invention is adopted, and the material is in a fluid state during construction and can automatically flow into gaps of the cables, so that a good plugging effect can be obtained, the problems of plugging dead angles, difficulty in leveling, incapability of penetrating fine gaps, uneven appearance and the like in the conventional method are solved, the plugging material has an excellent plugging effect on complex working conditions and complex shapes, and the appearance is attractive and smooth after plugging.
Comparative example 3:
a flame-retardant plugging agent for a substation is composed of A, B components according to a mass ratio of 5: 1, and A, B components are prepared according to the following weight:
the component A comprises:
Figure BDA0002289462710000101
and B component: same as example 1
The preparation method of the flame-retardant plugging agent for the substation is different from the preparation method of the embodiment 1 only in that raw materials and the mixture ratio thereof are different in the preparation process.
Comparative example 4:
a flame-retardant plugging agent for a substation is composed of A, B components according to a mass ratio of 5: 1, and A, B components are prepared according to the following weight:
the component A comprises:
Figure BDA0002289462710000102
and B component: same as example 1
The preparation method of the flame-retardant plugging agent for the substation is different from the preparation method of the embodiment 1 only in that raw materials and the mixture ratio thereof are different in the preparation process.
Comparative example 5
A flame-retardant plugging agent for a substation is composed of A, B components according to a mass ratio of 5: 1, and A, B components are prepared according to the following weight:
the component A comprises:
Figure BDA0002289462710000111
and B component: same as example 1
The preparation method of the flame-retardant plugging agent for the substation is different from the preparation method of the embodiment 1 only in that raw materials and the mixture ratio thereof are different in the preparation process.
For the flame retardant plugging agent prepared in comparative examples 3-5, A, B components were mixed well in a mass ratio of 5: 1, placed in a vacuum drying oven for vacuum defoamation for 15min, and then poured into a mold for curing for 24 hours to prepare test pieces, and various performance tests were performed, the data are shown in table 4.
TABLE 4 Properties of the flame-retardant blocking agents prepared in comparative examples 3 to 5
viscosity/mPas Flame retardant rating Tensile strength/MPa Elongation at break/% t1/s t2/s t3/s
Comparative example 3 3128 UL-94V1 0.73 61 4 16 31
Comparative example 4 3273 UL-94V0 0.71 60 2 9 24
Comparative example 5 5421 UL-94V1 0.81 69 6 14 20
As can be seen from Table 4, the flame retardant rating of comparative example 3 is not satisfactory, and the flame retardant performance (t1, t2, t3) of comparative example 4 is good, but the toughness is poor, and the repair requirement is difficult to meet. Comparative example 5 the flame retardant rating is unsatisfactory and the viscosity is too high to be practical.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.

Claims (10)

1. The flame-retardant plugging agent for the substation is characterized by comprising A, B components in a mass ratio of 4-6: 1, wherein the A component is prepared from the following components in parts by weight: 100 parts of vinyl silicone resin, 75-110 parts of flame-retardant filler and 0.1-6 parts of platinum catalyst; the component B is prepared from the following components in parts by weight: 20-60 parts of vinyl silicone resin, 40-80 parts of hydrogen-containing silicone resin, 0.5-5 parts of tackifier and 0.01-2 parts of inhibitor.
2. The flame retardant plugging agent for power transformation substation of claim 1, wherein the vinyl silicone resin is CH2＝CHSi(CH3)2O[(CH3)2SiO1/2]n(CH3)2SiCH＝CH2The viscosity is 280 to 310 mPas.
3. The flame retardant plugging agent for the power transformation substation as claimed in claim 2, wherein the flame retardant filler is compounded by activated aluminum hydroxide and melamine; the amount of the melamine is 20-60 parts; the amount of the active aluminum hydroxide is 30-70 parts.
4. The flame retardant plugging agent for the power transformation substation as claimed in any one of claims 1 to 3, wherein the platinum catalyst is a coordination compound of platinum or a chelate compound of platinum.
5. The flame-retardant plugging agent for the power transformation substation as claimed in any one of claims 1 to 3, wherein the hydrogen-containing silicone resin is (CH)3)3SiO[(CH3)2SiO1/2]n[(CH3)HSiO1/2]mSi(CH3)3(ii) a The mass fraction of active hydrogen is 0.15-0.20 wt%.
6. The flame retardant sealant for electric power transformation substation of claim 5 wherein the adhesion promoter is N- (β -aminoethyl) - γ -aminopropyltrimethoxysilane.
7. The flame retardant sealant for electric power substations of claim 5 wherein the inhibitor is ethynyl cyclohexanol.
8. The preparation method of the flame-retardant plugging agent for the power transformation substation as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
preparation of a component A: adding vinyl silicone resin, active aluminum hydroxide and melamine into a vacuum kneader according to the formula, mixing in vacuum at 110-130 ℃ to obtain a base material, and cooling for later use; taking 100 parts of base stock, adding a catalyst according to the formula, and uniformly stirring by using a variable speed stirrer to obtain a component A;
b, preparation of a component: taking the vinyl silicone resin, the hydrogen-containing silicone resin, the inhibitor and the tackifier according to the formula, and slowly stirring and mixing the vinyl silicone resin, the hydrogen-containing silicone resin, the inhibitor and the tackifier by using a variable speed stirrer to obtain the component B.
9. The preparation method of the flame retardant plugging agent for the power substation of claim 8, wherein in the preparation process of the component A, the vacuum mixing time is 3.8-4.2 h; the stirring speed is 1200-1700 rpm, and the stirring time is 15-25 min; in the preparation process of the component B, the slow stirring speed is 100-300 rpm, and the time is 8-12 min.
10. The use method of the flame-retardant plugging agent for the power transformation substation according to any one of claims 1 to 7 or the flame-retardant plugging agent for the power transformation substation prepared by the preparation method according to claim 8 or 9, characterized by comprising the following steps: and (3) mixing and stirring the component A and the component B uniformly according to the mass ratio of 4-6: 1, then pouring the mixture into the bottom of a terminal box of a substation, and carrying out self-leveling and curing.
CN201911173898.1A 2019-11-26 2019-11-26 Flame-retardant plugging agent for substation and preparation method and use method thereof Pending CN111073298A (en)

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CN103131381A (en) * 2013-03-06 2013-06-05 广州市高士实业有限公司 High-performance environmentally-friendly flame retardant type organic electron pouring sealant and preparation method thereof
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Application publication date: 20200428