CN110982185A - A fireproof sealing rubber material - Google Patents

A fireproof sealing rubber material Download PDF

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CN110982185A
CN110982185A CN201911293459.4A CN201911293459A CN110982185A CN 110982185 A CN110982185 A CN 110982185A CN 201911293459 A CN201911293459 A CN 201911293459A CN 110982185 A CN110982185 A CN 110982185A
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parts
fireproof sealing
flame retardant
rubber material
agent
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商珂
王俊胜
林贵德
金星
刘丹
赵璧
胡胜利
韩伟平
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Tianjin Fire Research Institute of MEM
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Tianjin Fire Research Institute of MEM
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    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
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    • C08K7/22—Expanded, porous or hollow particles
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    • C08K3/32—Phosphorus-containing compounds
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Abstract

The invention discloses a fireproof sealing rubber material which comprises the following components in parts by weight: 100 parts of rubber, 2 parts of vulcanizing agent, 30 parts of rubber reinforcing agent, 2-5 parts of silane coupling agent, 8-20 parts of flame retardant, 10-35 parts of synergistic flame retardant, 5-15 parts of charring agent, 10-50 parts of fluxing agent and 10-30 parts of porcelain forming filler. The addition amount of expandable graphite serving as a flame retardant is reduced, a certain amount of synergistic flame retardant is added, the fireproof sealing rubber material is endowed with good mechanical property and excellent flame retardant property, and under the condition of the same addition amount, the flame retardant property of the fireproof sealing material is far superior to that of a fireproof sealing material product only added with expandable graphite; meanwhile, due to the introduction of a certain amount of fluxing agent and porcelain forming filler, the fireproof sealing material can generate a ceramization effect at a lower temperature under the condition of high temperature, so that an expanded carbon layer with better integrity and strength is formed, and the effects of fire prevention, heat insulation and smoke prevention are achieved.

Description

Fireproof sealing rubber material
Technical Field
The invention relates to the field of fireproof sealing materials, in particular to a fireproof sealing rubber material.
Background
At present, sealing materials are often needed in the fields of building industry, mechanical industry and the like, so that the performances of sound insulation, dust prevention, freezing prevention, heat preservation, water prevention and the like of the structure are improved. For special fields, such as fire doors, fire windows, fire valves, fire shutters, etc., sealing materials with fire-proof and flame-retardant functions are required, and the sealing materials are required to have fire-proof and smoke-proof functions under normal temperature and fire environments.
Rubber is a high-elasticity polymer material with reversible deformation, can generate large deformation under the condition of low external force, and can quickly recover to the original form after the external force is removed, and the excellent elasticity enables the rubber to be widely applied to sealing materials. Rubber materials generally have the defect of flammability, and when the rubber materials are applied to the field of fireproof sealing, flame-retardant modification is needed. At present, expandable graphite is mostly used as a flame retardant in fireproof sealing materials in the market so as to improve the fireproof and flame-retardant effects of the fireproof sealing materials. However, the addition of expandable graphite drastically reduces the mechanical properties of the sealing material; meanwhile, the expandable graphite can be rapidly expanded into carbon in a fire environment, and the strength of the expanded carbon layer is weak, so that the fireproof sealing material loses the fireproof and smoke-proof effects in the fire environment, and the fire endangers the life and property safety of other fireproof subareas.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a fireproof sealing rubber material which has good mechanical property and excellent flame retardant property, and an expanded carbon layer formed after combustion has good integrity and strength.
In order to solve the technical problems, the invention provides a fireproof sealing rubber material which comprises the following components in parts by weight: 100 parts of rubber, 2 parts of vulcanizing agent, 30 parts of rubber reinforcing agent, 2-5 parts of silane coupling agent, 8-20 parts of flame retardant, 10-35 parts of synergistic flame retardant, 5-15 parts of charring agent, 10-50 parts of fluxing agent and 10-30 parts of porcelain forming filler.
Further, the fireproof sealing rubber material provided by the invention is prepared from one or more of natural rubber, styrene butadiene rubber, chloroprene rubber, ethylene propylene diene monomer rubber and silicon rubber.
The vulcanizing agent is dicumyl peroxide; the silane coupling agent is one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, 3- (triethoxysilyl) -1-propanethiol and gamma-mercaptopropyltrimethoxysilane.
The flame retardant is expandable graphite with the particle size of 106-212 mu m.
The synergistic flame retardant is one or more of melamine, ammonium phosphate, ammonium polyphosphate, ammonium hypophosphite, aluminum hypophosphite, boron phosphate, guanidine phosphate, phytic acid, magnesium hydroxide and aluminum hydroxide.
The ratio of the expandable graphite to the synergistic flame retardant is 1: 1-4.
The carbon forming agent is one or more of phenolic resin, cellulose, pentaerythritol, dipentaerythritol, alginic acid and starch.
The fluxing agent is one or more of zinc borate, boron trioxide and glass powder.
The melting point of the glass powder is 300-600 ℃.
The ceramic forming filler is one or more of kaolin, montmorillonite, organic modified montmorillonite, mica powder, diatomite, calcium carbonate, talcum powder, sepiolite, halloysite, vermiculite, glass beads and ceramic fiber.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention uses the synergistic flame retardant to partially replace expandable graphite, thereby reducing the influence of the expandable graphite on the mechanical property of the fireproof sealing material.
(2) The synergistic flame retardant added in the invention and the expandable graphite have a synergistic flame retardant effect, and under the condition of the same addition amount, the flame retardant property of the fireproof sealing material prepared by the invention is far better than that of a product only added with the expandable graphite.
(3) According to the invention, a certain amount of fluxing agent and porcelain forming filler are introduced, so that the fireproof sealing material can generate a ceramization effect at a lower temperature (600-800 ℃), and the expanded carbon layer formed at a high temperature is ensured to have better integrity and certain strength.
Drawings
FIG. 1-1 is a digital photograph of carbon residue after a cone calorimetry test of a comparative example;
FIGS. 1-2 are digital photographs of carbon residue after cone calorimetry test of example 14;
FIG. 2-1 is an SEM image of carbon residue after a cone calorimetry test of a comparative example;
FIG. 2-2 is an SEM image of carbon residue after cone calorimetry test of example 14.
Detailed Description
The invention provides a fireproof sealing rubber material which comprises the following components in parts by weight: 100 parts of rubber, 2 parts of vulcanizing agent, 30 parts of rubber reinforcing agent, 2-5 parts of silane coupling agent, 8-20 parts of flame retardant, 10-35 parts of synergistic flame retardant, 5-15 parts of charring agent, 10-50 parts of fluxing agent and 10-30 parts of porcelain forming filler, and the rubber material is prepared by adopting a conventional rubber material preparation process.
The rubber is one or more of natural rubber, styrene butadiene rubber, chloroprene rubber, ethylene propylene diene monomer rubber and silicon rubber, and the ethylene propylene diene monomer rubber and the silicon rubber are preferred.
The vulcanizing agent is added to play a role in vulcanization crosslinking, the rubber reinforcing agent is added to enhance the mechanical property of the fireproof sealing material, and the silane coupling agent is added to improve the compatilizer of other addition auxiliaries and rubber, so that the mechanical property of the fireproof sealing material is improved. The vulcanizing agent is dicumyl peroxide; the rubber reinforcing agent is preferably fumed silica with the particle size of 7-15 nm; the silane coupling agent is one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, 3- (triethoxysilyl) -1-propanethiol and gamma-mercaptopropyltrimethoxysilane, and preferably gamma-glycidoxypropyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane.
The flame retardant is added to improve the flame retardant property of rubber, the flame retardant is expandable graphite, the flame retardant efficiency is determined by the particle size of the expandable graphite, and in order to obtain a fireproof sealing material with good flame retardant property, the particle size of the expandable graphite added in the invention is larger, and the particle size of the expandable graphite is 106-212 mu m.
The added synergistic flame retardant component can play a synergistic flame retardant role with expandable graphite, so that the flame retardant performance of the fireproof sealing material is further improved, the synergistic flame retardant is one or more of melamine, ammonium phosphate, ammonium polyphosphate, ammonium hypophosphite, aluminum hypophosphite, boron phosphate, guanidine phosphate, phytic acid, magnesium hydroxide and aluminum hydroxide, and ammonium polyphosphate, aluminum hypophosphite and boron phosphate are preferably selected.
The ratio of the expandable graphite to the synergistic flame retardant influences the synergistic flame retardant efficiency of the expandable graphite and the synergistic flame retardant, and the ratio of the expandable graphite to the synergistic flame retardant is 1: 1-4.
The addition of the char-forming agent can provide a certain carbon source, so that the completeness of the fire-proof sealing material after combustion is improved, the char-forming agent is one or more of phenolic resin, cellulose, pentaerythritol, dipentaerythritol, alginic acid and starch, and the phenolic resin, pentaerythritol and dipentaerythritol are preferred.
The fluxing agent is added to reduce the temperature of the ceramic effect, and is one or more of zinc borate, boron trioxide and glass powder.
In order to reduce the temperature when the ceramization occurs, the invention can add glass powder with low melting point, and the melting point of the glass powder is 300-600 ℃.
The ceramic forming filler is added to form a better ceramic body under the combined action of the ceramic forming filler and the fluxing agent so as to ensure the integrity and the strength of the fireproof sealing material at high temperature, and the ceramic forming filler is one or more of kaolin, montmorillonite, organically modified montmorillonite, mica powder, diatomite, calcium carbonate, talcum powder, sepiolite, halloysite, vermiculite, glass microspheres and ceramic fibers, and preferably kaolin, montmorillonite, mica powder and sepiolite.
The invention will be further described with reference to the following figures and specific examples, which are not intended to limit the invention in any way.
Comparative example
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 2 parts of gamma-methacryloxypropyl trimethoxy silane and 40 parts of expandable graphite (with the particle size of 212 mu m), wherein the preparation process comprises the following steps:
plasticating the raw EPDM rubber for 3min by using an open mill, then sequentially adding the gamma-methacryloxypropyltrimethoxysilane, the fumed silica and the expandable graphite, mixing for 20min, finally adding the dicumyl peroxide, and mixing for 5 min. And (3) after uniformly mixing and standing for 24 hours, back-mixing and thinly passing through for 5 times to discharge gas, and then vulcanizing for 15min at the temperature of 160 ℃ and under the pressure of 25MPa by using a flat vulcanizing agent to prepare the fireproof sealing rubber material.
Example 1
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 2 parts of gamma-methacryloxypropyl trimethoxy silane, 20 parts of expandable graphite with the particle size of 212 mu m, 20 parts of ammonium polyphosphate, 5 parts of pentaerythritol, 30 parts of glass powder with the melting point of 300 ℃ and 20 parts of kaolin, and is prepared by a conventional rubber preparation process, and the specific process is as follows:
plasticating the raw EPDM rubber for 3min by using an open mill, then sequentially adding gamma-methacryloxypropyltrimethoxysilane, fumed silica, expandable graphite, ammonium polyphosphate, pentaerythritol, glass powder and kaolin, mixing for 30min, finally adding dicumyl peroxide, and mixing for 5 min. And (3) after uniformly mixing and standing for 24 hours, back-mixing and thinly passing through for 5 times to discharge gas, and then vulcanizing for 15min at the temperature of 160 ℃ and under the pressure of 25MPa by using a flat vulcanizing agent to prepare the fireproof sealing rubber material. The following examples were prepared in the same manner as the examples.
Example 2
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 2 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 5 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃) and 20 parts of montmorillonite, and the rubber is prepared by using a conventional rubber preparation process, and is referred to as example 1 and is not described again.
Example 3
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 2 parts of gamma-methacryloxypropyl trimethoxy silane, 8 parts of expandable graphite (with the particle size of 212 mu m), 32 parts of ammonium polyphosphate, 5 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃) and 20 parts of mica powder, and the rubber is prepared by using a conventional rubber preparation process.
Example 4
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 2 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃) and 20 parts of sepiolite, and the rubber is prepared by using a conventional rubber preparation process.
Example 5
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 2 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 15 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃) and 20 parts of mica powder, and the rubber is prepared by using a conventional rubber preparation process.
Example 6
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 3 parts of gamma-glycidyl ether oxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 160 mu m), 30 parts of aluminum hypophosphite, 10 parts of dipentaerythritol, 30 parts of glass powder (with the melting point of 400 ℃) and 20 parts of mica powder, and is prepared by using a conventional rubber preparation process.
Example 7
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 4 parts of gamma-glycidyl ether oxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 120 mu m), 30 parts of boron phosphate, 10 parts of phenolic resin, 30 parts of glass powder (with the melting point of 500 ℃) and 20 parts of mica powder, and the epoxy resin modified epoxy resin is prepared by using a conventional rubber preparation process.
Example 8
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-glycidyl ether oxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 106 mu m), 30 parts of ammonium polyphosphate, 10 parts of phenolic resin, 30 parts of glass powder (with the melting point of 600 ℃) and 20 parts of mica powder, and the epoxy resin modified epoxy resin is prepared by using a conventional rubber preparation process.
Example 9
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 15 parts of expandable graphite (with the particle size of 212 mu m), 35 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃) and 20 parts of mica powder, and the rubber is prepared by using a conventional rubber preparation process.
Example 10
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 7.5 parts of expandable graphite (with the particle size of 212 mu m), 22.5 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃) and 20 parts of mica powder, and is prepared by using a conventional rubber preparation process.
Example 11
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 5 parts of expandable graphite (with the particle size of 212 mu m), 10 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃) and 20 parts of mica powder, and the rubber is prepared by using a conventional rubber preparation process.
Example 12
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 50 parts of glass powder (with the melting point of 300 ℃) and 30 parts of mica powder, and the rubber is prepared by using a conventional rubber preparation process.
Example 13
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 10 parts of glass powder (with the melting point of 300 ℃) and 10 parts of mica powder, and the modified ethylene propylene diene monomer is prepared by using a conventional rubber preparation process.
Example 14
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃), 15 parts of mica powder and 5 parts of montmorillonite, and the modified ethylene propylene diene monomer is prepared by using a conventional rubber preparation process.
Example 15
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of zinc borate, 15 parts of mica powder and 5 parts of kaolin, and the rubber is prepared by using a conventional rubber preparation process.
Example 16
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of boron trioxide, 15 parts of mica powder and 5 parts of sepiolite, and the rubber is prepared by using a conventional rubber preparation process.
Example 17
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of boron trioxide, 15 parts of mica powder and 5 parts of montmorillonite, and the rubber is prepared by using a conventional rubber preparation process.
Example 18
The fireproof sealing rubber material comprises the following components in parts by weight: 100 parts of silicon rubber, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃), 15 parts of mica powder and 5 parts of montmorillonite, and the modified silicon rubber is prepared by using a conventional rubber preparation process.
Example 19
The fireproof sealing rubber material comprises the following components in parts by weight: 70 parts of ethylene propylene diene monomer, 30 parts of silicone rubber, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxysilane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃), 15 parts of mica powder and 5 parts of montmorillonite, and the high-performance rubber is prepared by using a conventional rubber preparation process.
Example 20
The fireproof sealing rubber material comprises the following components in parts by weight: 50 parts of ethylene propylene diene monomer, 50 parts of silicone rubber, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxy silane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃), 15 parts of mica powder and 5 parts of montmorillonite, and the high-performance rubber is prepared by using a conventional rubber preparation process.
Example 21
The fireproof sealing rubber material comprises the following components in parts by weight: 30 parts of ethylene propylene diene monomer, 70 parts of silicone rubber, 2 parts of dicumyl peroxide, 30 parts of fumed silica, 5 parts of gamma-methacryloxypropyl trimethoxysilane, 10 parts of expandable graphite (with the particle size of 212 mu m), 30 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 30 parts of glass powder (with the melting point of 300 ℃), 15 parts of mica powder and 5 parts of montmorillonite, and the modified ethylene propylene diene monomer is prepared by using a conventional rubber preparation process.
Table 1 provides the mechanical properties, Limiting Oxygen Index (LOI), vertical burn (UL-94), Peak Heat Release Rate (PHRR) in cone calorimetry, and apparent observations of the integrity and strength of the expanded carbon layer after cone calorimetry for the flame-retardant sealant rubber materials prepared according to the formulations of the comparative example and 21 examples. The mechanical property of the fireproof sealing rubber material is tested according to the standard GB/T528-.
TABLE 1
Figure BDA0002319772840000071
Figure BDA0002319772840000081
FIGS. 1-1 and 1-2 are digital photographs of carbon residue after cone calorimetry tests of comparative example and example 14, respectively, from which it can be seen that the carbon layer formed after combustion of the comparative example is highly susceptible to cracking, and has very poor integrity and strength, while the carbon layer formed after combustion of the sample after addition of flux and ceramic-forming filler has better integrity and strength; FIGS. 2-1 and 2-2 are SEM images of carbon residue after cone calorimetry tests of comparative example and example 14, respectively, and it can be seen from the photographs that the examples formed vermicular carbon residue mainly of residual expanded graphite after burning, which was relatively loose, and thus had poor integrity and strength of the carbon residue formed after burning, while the samples formed dense carbon layers after adding flux and porcelain-forming filler, which gave better integrity and strength of the carbon residue.
Compared with the prior art, the addition amount of expandable graphite serving as a flame retardant is reduced, and a certain amount of synergistic flame retardant is added, so that the fireproof sealing rubber material has good mechanical property and excellent flame retardant property; meanwhile, under the high-temperature condition, the fluxing agent and the porcelain forming filler in the fireproof sealing rubber material can generate the ceramization effect to form an expanded carbon layer with better integrity and strength, so that the fireproof, heat-insulating and smoke-proof effects are achieved, and the life and property safety of people is effectively guaranteed.
The above description is only a part of the embodiments of the present invention, and the present invention is not limited thereto in any way, and those skilled in the art can make many variations without departing from the spirit of the present invention, and all simple and non-essential improvements and modifications to the above embodiments according to the technical solution of the present invention belong to the protection scope of the present invention.

Claims (10)

1. The fireproof sealing rubber material is characterized by comprising the following components in parts by weight:
100 parts of rubber, 2 parts of vulcanizing agent, 30 parts of rubber reinforcing agent, 2-5 parts of silane coupling agent, 8-20 parts of flame retardant, 10-35 parts of synergistic flame retardant, 5-15 parts of charring agent, 10-50 parts of fluxing agent and 10-30 parts of porcelain forming filler.
2. The fireproof sealing rubber material according to claim 1, wherein the rubber is one or more of natural rubber, styrene-butadiene rubber, chloroprene rubber, ethylene propylene diene monomer rubber and silicone rubber.
3. The flame retardant sealing rubber material of claim 1, wherein the vulcanizing agent is dicumyl peroxide; the silane coupling agent is one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, 3- (triethoxysilyl) -1-propanethiol and gamma-mercaptopropyltrimethoxysilane.
4. The fireproof sealing rubber material according to claim 1, wherein the flame retardant is expandable graphite with a particle size of 106-212 μm.
5. The fireproof sealing rubber material according to claim 1, wherein the synergistic flame retardant is one or more of melamine, ammonium phosphate, ammonium polyphosphate, ammonium hypophosphite, aluminum hypophosphite, boron phosphate, guanidine phosphate, phytic acid, magnesium hydroxide and aluminum hydroxide.
6. The fireproof sealing rubber material according to claim 4, wherein the ratio of the expandable graphite to the synergistic flame retardant is 1: 1-4.
7. The fireproof sealing rubber material of claim 1, wherein the char-forming agent is one or more of phenolic resin, cellulose, pentaerythritol, dipentaerythritol, alginic acid, and starch.
8. The fireproof sealing rubber material according to claim 1, wherein the fluxing agent is one or more of zinc borate, boron trioxide and glass powder.
9. The fireproof sealing rubber material according to claim 8, wherein the melting point of the glass powder is 300-600 ℃.
10. The fireproof sealing rubber material according to claim 1, wherein the porcelain forming filler is one or more of kaolin, montmorillonite, organically modified montmorillonite, mica powder, diatomite, calcium carbonate, talcum powder, sepiolite, halloysite, vermiculite, glass beads and ceramic fibers.
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CN115260564A (en) * 2022-07-26 2022-11-01 青岛科技大学 A kind of flame retardant fluorosilicone rubber foam and preparation process thereof
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