CN113265222B - Polymer moisture-proof fireproof plugging composite material and use method thereof - Google Patents
Polymer moisture-proof fireproof plugging composite material and use method thereof Download PDFInfo
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- CN113265222B CN113265222B CN202110581174.1A CN202110581174A CN113265222B CN 113265222 B CN113265222 B CN 113265222B CN 202110581174 A CN202110581174 A CN 202110581174A CN 113265222 B CN113265222 B CN 113265222B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on 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; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- 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
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- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention provides a polymer moisture-proof fireproof plugging composite material and a use method thereof, belonging to the technical field of polymer compounds. The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: vinyl terminated polysiloxane, alpha, omega-dihydroxy polysiloxane, methylbutynol, and silica powder; the component B is prepared from the following raw materials: polyborosiloxane, hydrogen-containing silicone oil and a Pt catalyst, wherein the weight ratio of the component A to the component B is 1:1. the high polymer moisture-proof and fireproof plugging composite material is suitable for plugging of an electrical cabinet or corrosion treatment, and has good insulating, moisture-proof and fireproof properties.
Description
Technical Field
The invention belongs to the technical field of high molecular compounds, and particularly relates to a high molecular moisture-proof fireproof plugging composite material and a use method thereof.
Background
The electrical cabinet is widely applied in the field of electric power, and is generally a cabinet which is manufactured by steel materials and used for protecting components from working normally. The bottom of the electrical cabinet is typically pre-perforated with holes based on the need for cables to be introduced into the cabinet. Because the size of the cable and the reasons such as the quantity difference of the cable and the hole can not be completely sealed and attached, the electrical cabinet can be not sealed tightly, moisture can easily enter the cabinet to corrode the cabinet body or electrical elements, small animals and the like can also enter the cabinet to damage the cable and the like, and therefore certain remedial measures are necessary to be taken.
The prior art generally adopts the following measures: (1) a plugging structure is additionally arranged in the hole, for example, a patent document with the publication number of CN211046062U, and an electrical cabinet plugging structure is provided, so that a gap between a cable and the hole is completely sealed; (2) moisture-proof measures are taken, for example, a moisture-proof power cabinet is provided with a publication number CN108539631A, and a moisture-proof device comprising a drying component and a blowing component is added in the cabinet; publication No. CN103247945A provides a dampproofing terminal box, forms the condensation chamber between outer lid and the inner cover body, prevents that the moisture from passing through the hydrofuge passageway and getting into the box, cuts off the replenishment of the inside moisture of box from the source, effectively improves the dampproofing effect of terminal box. However, the measures need to modify the electrical cabinet, or preset at the initial installation stage, and the problems occurring in the operation process of the electrical cabinet cannot be solved well.
Disclosure of Invention
The invention aims to solve the technical problem that the polymer moisture-proof and fireproof plugging composite material is provided for the sealing of an electric cabinet body or the repairing of an electric cabinet and the like which are rusted and has good insulating, moisture-proof and fireproof performances aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: vinyl terminated polysiloxane, alpha, omega-dihydroxy polysiloxane, methylbutynol, and silica powder; the component B is prepared from the following raw materials: the catalyst comprises polyborosiloxane, hydrogen-containing silicone oil, polyether modified silicone oil and a Pt catalyst, wherein the weight ratio of the component A to the component B is 1:1.
in the invention, the component A and the component B are mixed, and under the condition of room temperature, the Pt catalyst catalyzes the alpha, omega-dihydroxy polysiloxane and the hydrogen-containing silicone oil to carry out silicon hydrogen condensation dehydrogenation reaction, and the generated hydrogen promotes the formation of a cellular structure; the vinyl-terminated polysiloxane and hydrogen-containing silicone oil have hydrosilylation reaction, and a network structure is gradually formed inside the vinyl-terminated polysiloxane, so that the vinyl-terminated polysiloxane can be quickly molded. The methyl butynol is a polymerization inhibitor for hydrosilylation reaction, can better control the reaction process and obtain a product with excellent performance; the silicon dioxide powder is filler particles, so that the mechanical property of the material can be enhanced; the addition of the polyborosiloxane can improve the crosslinking rate of the material and the structure of formed cells, thereby improving the air tightness of the material. The proper amount of the polyether modified silicone oil can improve the leveling property of the material, so that the material has better leveling property before curing, is convenient for casting and sealing, and ensures that a forming surface is more smooth.
Preferably, the vinyl-terminated polysiloxane is a vinyl-terminated polyphenylsiloxane or a vinyl-terminated dimethylpolysiloxane.
Vinyl-terminated polyphenylsiloxane or vinyl-terminated dimethylpolysiloxane undergoes a hydrosilylation reaction with hydrogen-containing silicone oil, and a network structure is gradually formed inside.
Preferably, the hydroxyl group content of the polyborosiloxane is 1.5 to 4%. The addition amount of the polyborosiloxane needs to be strictly controlled, and the excessive addition amount can increase the hardness of the material, weaken the elasticity and reduce the durability; if too little, the effect of improving the airtightness of the material is not obvious.
Preferably, the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding the dimethyl polysiloxane, boric acid and calcium carbonate into a vacuum kneader, sealing the kettle, starting stirring, heating to 172-180 ℃, keeping for 2-2.5 hours after the temperature reaches 172-180 ℃, and cooling for 4-5 hours after the reaction is finished to obtain the product.
The particle size of the calcium carbonate is 100nm to 1.0 mu m.
The mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100: (8-15): (8.5-11.5).
The polyborosiloxane is obtained by boric acid and polydimethylsiloxane through high-temperature reaction at 172-180 ℃, the interaction between boron and oxygen plays an important role in the viscoelasticity of the polyborosiloxane, the polyborosiloxane forms reversible physical crosslinking through temporary Si-O: B weak bond splitting and reconnection, has shear thickening characteristics, and can improve the crosslinking rate of the material and form a cellular structure when applied to the material, so that the air tightness of the material is improved. Calcium carbonate is used as a filler to improve the mechanical properties and rheological properties of the material.
Preferably, the polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of vinyl-terminated polysiloxane; 80-110 parts of alpha, omega-dihydroxy polysiloxane; 0.2-1.5 parts by weight of methylbutynol; 20-35 parts by weight of silicon dioxide powder; the component B is prepared from the following raw materials: 40-55 parts of polyborosiloxane; 45-70 parts of hydrogen-containing silicone oil; 0.05-0.2 part by weight of polyether modified silicone oil; 0.6-1.8 parts by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1.
the active hydrogen mole fraction of the hydrogen-containing silicone oil is 0.3-0.8mol/100g. According to the reaction principle, the silicon-hydrogen bond participates in the hydrosilylation reaction and the hydrosilylation condensation dehydrogenation reaction at the same time, and is closely related to the formation process of a three-dimensional cross-linked network and a cellular structure in a system. Therefore, the hydrogen-containing silicone oil containing more silicon-hydrogen bonds can be used as a cross-linking agent and a foaming agent, and the dosage of the hydrogen-containing silicone oil can directly influence the foaming degree and the vulcanization degree of the material, and further influence the macroscopic performance. When the using amount of the hydrogen-containing silicone oil is too low, not only is the foaming coefficient small, but also the vulcanization reaction can not be completely carried out, the surface viscosity of the material is large, and the mechanical property is poor, so that the using amount of the hydrogen-containing silicone oil can not be too low; however, when the dosage of the hydrogen-containing silicone oil exceeds a certain range, the foaming coefficient of the material is not obviously changed. Therefore, a suitable amount of hydrogen-containing silicone oil is of great importance.
Preferably, the polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of vinyl-terminated dimethylpolysiloxane; 97-110 parts of alpha, omega-dihydroxy polysiloxane; 0.2-1.0 part by weight of methylbutynol; 20-30 parts of silicon dioxide powder; the component B is prepared from the following raw materials: 45-55 parts of polyborosiloxane; 45-58 parts of hydrogen-containing silicone oil; 0.05-0.2 part by weight of polyether modified silicone oil; 1.0-1.8 parts by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1.
preferably, the polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of a vinyl-terminated polyphenylsiloxane; 80-100 parts of alpha, omega-dihydroxy polysiloxane; 0.9-1.5 parts by weight of methylbutynol; 28-35 parts of silicon dioxide powder; the component B is prepared from the following raw materials: 40-48 parts of polyborosiloxane; 55-70 parts of hydrogen-containing silicone oil; 0.05-0.2 part by weight of polyether modified silicone oil; 0.6-1.2 parts by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1.
the invention also provides a use method of the polymer moisture-proof fireproof plugging composite material, which comprises the following steps:
s1, accurately weighing a component A and a component B according to a ratio;
s2, uniformly mixing the component A and the component B in a mixing tank to obtain a sizing material;
s3, encapsulating the uniformly mixed glue stock into the bottom of the electrical cabinet or a gap of an element to ensure self-leveling in the whole process;
and S4, curing at room temperature or standing, and heating for curing after the rubber material automatically foams until the bubbles disappear.
Preferably, the curing time under the room temperature condition is 0.5 to 4 hours.
The use method provided by the invention can be used for a new electric cabinet and also can be used for an electric cabinet which has the problems of corrosion, falling and the like, when the use method is used for the electric cabinet which has been corroded, the electric cabinet needs to be subjected to necessary treatment work before use, and the use method specifically comprises the following steps: cables and labels on a working face are tidied, dust, iron rust and the like are removed, and a metal plate is adopted to reinforce places with serious rust; and a hole with the diameter larger than 2mm at the bottom of the cabinet body is pre-sealed by fireproof mud or other fireproof materials.
The applicant has found in long-term work and practice that the bottom of the electrical cabinet is generally susceptible to corrosion after long-term use, and that such corrosion is what happens. First, the cabinet body is sealed not tight condition, in case rainy season comes, moist air will be continuous through in the gap gets into the switch board, because moisture gathers in the cabinet for a long time, can discover to go mouldy under the effect of humiture, the corrosion phenomenon, even in addition is clear weather, if the switch board body is done not tightly, will have the electricity and breathe the phenomenon. When the sun shines directly, because greenhouse effect, the switch board cabinet body temperature is less than the outside temperature, and at this moment the neutralization switch board cabinet body will absorb the outside temperature. This is electrical breathing, the presence of which can introduce moisture and cause corrosion. Secondly, because transportation or other reasons, the casing is impaired for the coating on surface receives destruction, also can make the switch board casing produce the corrosion. Thirdly, environmental impact, air pollution, chemicals, oil stains and the like all can corrode the cabinet body of the power distribution cabinet. To avoid such corrosion, a moisture-proof device is added to drive away moisture; optionally, the cabinet may be sealed to prevent moisture from entering the cabinet, but conventional sealing methods, such as adding a sealing structure, or using fire-proof mud, quick-drying cement, fire-proof board/plasterboard, etc., are not effective.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a high-molecular moisture-proof fireproof plugging composite material, which is mainly applied to an electrical cabinet, can be coated at the initial installation stage of the electrical cabinet, and can also be used for remediation under the conditions of corrosion of the electrical cabinet and the like, is formed by two components, is mixed on site, can finish leveling after uniform pouring, has the characteristics of good sealing property, flame retardance, heat insulation, durability, easy expansion and the like, can resist high and low temperatures and various severe environments, has the characteristics of no deformation, no deterioration and no cracking, can be tightly combined with various metal materials and cable sheath materials, and does not generate any adverse chemical reaction; the device can be widely applied to the bottom of an electric and communication cabinet; can effectively prevent small animals and the like from entering the closed cabinet from the underground, prevent the moist air of a cable interlayer or a channel from permeating into the cabinet, and provide a firm protective barrier for production and operation equipment.
The composite material has good fluidity and strong permeability before curing, and is convenient for sealing a box body; and the double-component design is adopted, so that the curing can be carried out at room temperature and also can be accelerated at high temperature, and the production efficiency is improved; the curing process is exothermic, has no byproducts and has no corrosion to the base material; the paint can be deeply cured, has small shrinkage, and has better waterproof, moistureproof and anti-aging performances; excellent high and low temperature resistance, and good insulating property maintained within the temperature range of minus 60 to 200 ℃.
Detailed Description
In order to better understand the present invention, the following examples are further used to clearly illustrate the content of the present invention, but the content of the present invention is not limited to the following examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
Vinyl-terminated dimethylpolysiloxane, α, ω -dihydroxypolysiloxane, methylbutinol, silica powder, polydimethylsiloxane, boric acid, calcium carbonate, hydrogen-containing silicone oil, polyether-modified silicone oil, and Pt catalyst used in the following examples were all commercially available raw materials.
Example 1
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of vinyl-terminated dimethylpolysiloxane; 80 parts of alpha, omega-dihydroxy polysiloxane; 0.2 part by weight of methylbutynol; 20 parts by weight of silicon dioxide powder; the component B is prepared from the following raw materials: 40 parts by weight of polyborosiloxane; 45 parts of hydrogen-containing silicone oil; 0.05 part by weight of polyether modified silicone oil; 0.6 part by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1.
wherein the particle size of the silicon dioxide powder is 5-40nm.
The active hydrogen mole fraction of the hydrogen-containing silicone oil is 0.3-0.6mol/100g.
In the invention, the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding the weighed polydimethylsiloxane, boric acid and calcium carbonate into a vacuum kneader, sealing the kettle, starting stirring, heating to 172 ℃, keeping for 2 hours after the temperature reaches 172 ℃, and cooling for 4 hours after the reaction is finished to obtain the product.
The particle size of the calcium carbonate is 100nm to 1.0 mu m.
The mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100:8:8.5.
in the present invention, the hydroxyl group content of the polyborosiloxane is 1.5 to 4%.
Example 2
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of a vinyl-terminated polyphenylsiloxane; 110 parts of alpha, omega-dihydroxy polysiloxane; 1.5 parts by weight of methylbutynol; 35 parts by weight of silica powder; the component B is prepared from the following raw materials: 55 parts by weight of polyborosiloxane; 70 parts of hydrogen-containing silicone oil; 0.2 part by weight of polyether modified silicone oil; 1.8 parts by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1.
wherein the particle size of the silicon dioxide powder is 5-40nm.
The active hydrogen mole fraction of the hydrogen-containing silicone oil is 0.3-0.8mol/100g.
In the present invention, the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding the weighed polydimethylsiloxane, boric acid and calcium carbonate into a vacuum kneader, sealing the kettle, starting stirring, heating to 175 ℃, keeping for 2.5 hours after the temperature reaches 175 ℃, and cooling for 5 hours after the reaction is finished to obtain the product.
The particle size of the calcium carbonate is 100nm to 1.0 mu m.
The mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100:15:11.5.
in the present invention, the hydroxyl group content of the polyborosiloxane is 1.5 to 4%.
Example 3
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of vinyl-terminated dimethylpolysiloxane; 97 parts by weight of alpha, omega-dihydroxy polysiloxane; 0.5 part by weight of methylbutynol; 23 parts by weight of silicon dioxide powder; the component B is prepared from the following raw materials: 45 parts by weight of polyborosiloxane; 58 parts of hydrogen-containing silicone oil; 0.07 part by weight of polyether modified silicone oil; 1.0 part by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1.
wherein the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding the weighed polydimethylsiloxane, boric acid and calcium carbonate into a vacuum kneader, sealing the kettle, starting stirring, heating to 180 ℃, keeping for 2 hours after the temperature reaches 180 ℃, and cooling for 4.5 hours after the reaction is finished to obtain the product.
The particle size of the calcium carbonate is 100nm to 1.0 mu m.
The mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100:10:9.
in the present invention, the hydroxyl group content of the polyborosiloxane is 1.5 to 4%.
Example 4
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of vinyl-terminated dimethylpolysiloxane; 100 parts by weight of alpha, omega-dihydroxy polysiloxane; 0.8 part by weight of methylbutynol; 28 parts by weight of silicon dioxide powder; the component B is prepared from the following raw materials: 50 parts by weight of polyborosiloxane; 50 parts of hydrogen-containing silicone oil; 0.12 part by weight of polyether modified silicone oil; 1.5 parts by weight of a Pt catalyst; (ii) a The weight ratio of the component A to the component B is 1:1.
wherein the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding the weighed polydimethylsiloxane, boric acid and calcium carbonate into a vacuum kneader, sealing the kettle, starting stirring, heating to 178 ℃, keeping for 2.3 hours after the temperature reaches 178 ℃, and cooling for 4.5 hours after the reaction is finished to obtain the product.
The particle size of the calcium carbonate is 100nm to 1.0 mu m.
The mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100:12:11.
the hydroxyl content of the polyborosiloxane is 1.5-4%.
Example 5
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of vinyl-terminated dimethylpolysiloxane; 110 parts of alpha, omega-dihydroxy polysiloxane; 1.0 part by weight of methylbutynol; 30 parts by weight of silica powder; the component B is prepared from the following raw materials: 55 parts by weight of polyborosiloxane; 58 parts of hydrogen-containing silicone oil; 0.15 part by weight of polyether modified silicone oil; 1.6 parts by weight of a Pt catalyst; (ii) a The weight ratio of the component A to the component B is 1:1.
wherein the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding the weighed materials into a vacuum kneading machine, sealing the kettle, starting stirring, heating to 178 ℃, keeping for 2.3 hours after the temperature reaches 178 ℃, and cooling for 4.5 hours after the reaction is finished to obtain the product.
The particle size of the calcium carbonate is 100nm to 1.0 mu m.
The mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100:9:9.
the hydroxyl content of the polyborosiloxane is 1.5-4%.
Example 6
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of a vinyl-terminated polyphenylsiloxane; 80 parts of alpha, omega-dihydroxy polysiloxane; 0.9 part by weight of methylbutynol; 28 parts by weight of silicon dioxide powder; the component B is prepared from the following raw materials: 40 parts by weight of polyborosiloxane; 55 parts of hydrogen-containing silicone oil; 0.2 part by weight of polyether modified silicone oil; 0.6 part by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1. polyborosiloxane was the same as in example 1.
Example 7
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of a vinyl-terminated polyphenylsiloxane; 90 parts by weight of alpha, omega-dihydroxy polysiloxane; 1.2 parts by weight of methylbutynol; 32 parts by weight of silicon dioxide powder; the component B is prepared from the following raw materials: 45 parts by weight of polyborosiloxane; 65 parts of hydrogen-containing silicone oil; 0.08 part by weight of polyether modified silicone oil; 0.9 part by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1. polyborosiloxane was the same as in example 1.
Example 8
The polymer moisture-proof fireproof plugging composite material consists of a component A and a component B, wherein the component A is prepared from the following raw materials: 100 parts by weight of a vinyl-terminated polyphenylsiloxane; 100 parts by weight of alpha, omega-dihydroxy polysiloxane; 1.5 parts by weight of methylbutynol; 35 parts by weight of silicon dioxide powder; the component B is prepared from the following raw materials: 48 parts by weight of polyborosiloxane; 70 parts of hydrogen-containing silicone oil; 0.16 part by weight of polyether modified silicone oil; 1.2 parts by weight of a Pt catalyst; the weight ratio of the component A to the component B is 1:1. the polyborosiloxane is the same as in example 1.
Example 9
A use method of the polymer moisture-proof fireproof sealing combined material comprises the following steps:
s1, accurately weighing the component A and the component B according to any proportion in the embodiments 1-8;
s2, uniformly mixing the component A and the component B in a mixing tank to obtain a sizing material;
s3, encapsulating the uniformly mixed glue stock into the bottom of the electrical cabinet or a gap of an element to ensure self-leveling in the whole process;
and S4, curing at room temperature or standing, and heating for curing after the rubber material automatically foams until the bubbles disappear.
The curing time under the room temperature condition is 0.5 to 4 hours. The temperature is high in summer, and the curing is faster; the curing will be slower with lower temperatures in winter.
Example 10
A use method of the polymer moisture-proof fireproof sealing combined material comprises the following steps:
s0, finishing cables and labels on a working surface, removing dust, rust and the like, and reinforcing the place with serious rust by adopting a metal plate; pre-sealing a hole with the diameter of more than 2mm at the bottom of the cabinet body by using fireproof mud or other fireproof materials;
s1, accurately weighing the component A and the component B according to any proportion in the embodiments 1-8;
s2, uniformly mixing the component A and the component B in a mixing tank to obtain a rubber material;
s3, encapsulating the uniformly mixed glue stock to the bottom of the electrical cabinet or a gap of an element to ensure the self-leveling of the whole process;
and S4, curing at room temperature or standing, and heating for curing after the rubber material automatically foams until the bubbles disappear.
The curing time under the room temperature condition is 0.5 to 4 hours. The temperature is high in summer, and the curing speed is faster; the curing will be slower with lower temperatures in winter.
Comparative example 1: in contrast to example 1, the polyborosiloxane in the B component was omitted and the remaining raw materials and their proportions were unchanged.
Comparative example 2: in contrast to example 1, the methylbutinol of component A was omitted and the remaining starting materials and their proportions were unchanged.
Comparative example 3: different from example 1, the polyether modified silicone oil in the component B was adjusted to 0.5 part by weight, and the remaining raw materials and their proportions were unchanged.
Comparative example 4: in contrast to example 1, the polyborosiloxane in the B component was adjusted to 62 parts by weight, and the remaining raw materials and their proportions were unchanged.
Evaluation of the effects: the materials prepared according to any of the above examples 1 to 8 of the present invention, the materials prepared according to comparative examples 1 to 4, and conventional fire-proof mud, quick-drying cement, fire-proof board/plasterboard were compared for the following properties, with reference standards for the various property tests as follows:
GB50229-2006 fire protection standard for design of thermal power plants and power substations;
GB50217-2018 electric power engineering cable design Specification;
DL/T5221-2016 technical Specification for urban Power Cable line design;
GA 161-1997 performance requirements and experimental methods of fireproof plugging materials;
TD-DL92-3001 general design for fireproof and flame retardant of cable;
DLGJ154-2000 Cable fire protection measure design and construction acceptance Standard;
DL5027-2015 typical fire control regulations for electric power equipment;
GB50168-2018 Specification on construction and acceptance of cable lines in electrical installation engineering;
GB50987-2014 fireproof Specification for design of Water conservancy and hydropower engineering;
CECS 154-2003 technical Specification for fireproof sealing and plugging of buildings.
The results of the test alignment are shown in tables 1, 2 and 3 below:
TABLE 1 Properties of the composite materials according to the invention
TABLE 2 Performance comparison (I)
According to the test and the comparison result, the combined material provided by the invention is used as a sealing material of an electrical cabinet, has the advantages of good insulating property, high bonding strength, impermeability, flame retardance and high hardness, is suitable for construction operation, and can realize better presentation of the properties through better synergistic cooperation of all components in the combined material.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. Dampproofing fire prevention shutoff combined material of polymer, its characterized in that: consists of a component A and a component B,
the component A is prepared from the following raw materials:
100 parts by weight of vinyl-terminated polysiloxane;
90-100 parts of alpha, omega-dihydroxy polysiloxane;
0.2-0.6 part by weight of methylbutynol;
20-30 parts of silicon dioxide powder;
the component B is prepared from the following raw materials:
40-55 parts of polyborosiloxane;
45-60 parts of hydrogen-containing silicone oil;
0.05-0.2 part by weight of polyether modified silicone oil;
0.6-1.8 parts by weight of a Pt catalyst;
the weight ratio of the component A to the component B is 1:1,
the hydroxyl content of the polyborosiloxane is 1.5-4%, and the active hydrogen mole fraction of the hydrogen-containing silicone oil is 0.3-0.8mol/100g.
2. A polymer moisture-proof fire-proof sealing composite material as claimed in claim 1, wherein: the vinyl terminated polysiloxane is a vinyl terminated polyphenylsiloxane or a vinyl terminated dimethylpolysiloxane.
3. A moisture-proof and fire-proof polymeric plugging composite material as claimed in claim 1, wherein: the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding the weighed materials into a vacuum kneading machine, sealing the kettle, starting stirring, heating to 172-180 ℃, keeping for 2-2.5 hours after the temperature reaches 172-180 ℃, and cooling for 4-5 hours after the reaction is finished to obtain the product.
4. A moisture-proof and fire-proof polymeric plugging composite material as claimed in claim 3, wherein: the mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100: (8-15): (8.5-11.5).
5. The utility model provides a dampproofing fire prevention shutoff combined material of polymer which characterized in that: the composition consists of a component A and a component B, wherein the component A is prepared from the following raw materials:
100 parts by weight of vinyl-terminated dimethylpolysiloxane;
90-100 parts of alpha, omega-dihydroxy polysiloxane;
0.5-1.2 parts by weight of methylbutynol;
20-30 parts of silicon dioxide powder;
the component B is prepared from the following raw materials:
45-55 parts of polyborosiloxane;
50-60 parts of hydrogen-containing silicone oil;
0.05-0.2 part by weight of polyether modified silicone oil;
1.2-1.8 parts by weight of a Pt catalyst;
the weight ratio of the component A to the component B is 1:1;
the hydroxyl content of the polyborosiloxane is 1.5-4%, and the active hydrogen mole fraction of the hydrogen-containing silicone oil is 0.3-0.8mol/100g;
the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding into a vacuum kneader, sealing the kettle, stirring, heating to 172-180 deg.C, maintaining for 2-2.5 hr when the temperature reaches 172-180 deg.C, cooling for 4-5 hr after reaction to obtain,
the mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100: (8-15): (8.5-11.5).
6. The utility model provides a dampproofing fire prevention shutoff combined material of polymer which characterized in that: the composition consists of a component A and a component B, wherein the component A is prepared from the following raw materials:
100 parts by weight of a vinyl-terminated polyphenylsiloxane;
95-105 parts of alpha, omega-dihydroxy polysiloxane;
1.1-1.5 parts by weight of methylbutynol;
28-32 parts of silicon dioxide powder;
the component B is prepared from the following raw materials:
42-48 parts of polyborosiloxane;
60-68 parts of hydrogen-containing silicone oil;
0.05-0.2 part by weight of polyether modified silicone oil;
0.9-1.3 parts by weight of a Pt catalyst;
the weight ratio of the component A to the component B is 1:1;
the hydroxyl content of the polyborosiloxane is 1.5-4%, and the active hydrogen mole fraction of the hydrogen-containing silicone oil is 0.3-0.8mol/100g;
the polyborosiloxane is obtained by the following preparation method: weighing polydimethylsiloxane, boric acid and calcium carbonate, adding into a vacuum kneading machine, sealing the kettle, starting stirring, heating to 172-180 deg.C, holding for 2-2.5 hr after the temperature reaches 172-180 deg.C, cooling for 4-5 hr after the reaction is finished to obtain,
the mass ratio of the dimethyl siloxane to the boric acid to the calcium carbonate is 100: (8-15): (8.5-11.5).
7. A method for using the polymeric moisture-proof and fire-proof plugging composite material as claimed in claim 1, wherein: the method comprises the following steps:
s1, accurately weighing a component A and a component B according to a proportion;
s2, uniformly mixing the component A and the component B in a mixing tank to obtain a sizing material;
s3, encapsulating the uniformly mixed glue material to the bottom of the electrical cabinet or a gap of an element to ensure self-leveling in the whole process;
s4, curing at room temperature or standing, and heating for curing after the rubber material automatically foams until bubbles disappear.
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