CN113881394B - Flame-retardant fireproof sealant and preparation method thereof - Google Patents
Flame-retardant fireproof sealant and preparation method thereof Download PDFInfo
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- CN113881394B CN113881394B CN202111335091.0A CN202111335091A CN113881394B CN 113881394 B CN113881394 B CN 113881394B CN 202111335091 A CN202111335091 A CN 202111335091A CN 113881394 B CN113881394 B CN 113881394B
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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
- C09J11/04—Non-macromolecular additives inorganic
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/267—Magnesium carbonate
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- 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
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
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Abstract
The invention relates to the technical field of sealant preparation, and particularly discloses a flame-retardant fireproof sealant and a preparation method thereof. The flame-retardant fireproof sealant comprises the following raw material components in parts by weight, 80-100 parts of polydimethylsiloxane; 5-10 parts of a crosslinking agent; 0.5-2 parts of a catalyst; 3-6 parts of a dispersing agent; 1-10 parts of a plasticizer; 1-5 parts of a flame retardant; the flame retardant consists of zinc borate and anhydrous magnesium carbonate. Researches show that in the process of preparing the flame-retardant fireproof sealant by taking the polydimethylsiloxane as the raw material, the flame retardant consisting of the zinc borate and the anhydrous magnesium carbonate is added, and a certain fireproof flame-retardant effect can be realized only by adding a small amount of flame retardant.
Description
Technical Field
The invention relates to the technical field of sealant preparation, in particular to a flame-retardant fireproof sealant and a preparation method thereof.
Background
The sealant is an adhesive used for filling a configuration gap to play a sealing role, needs to deform along with the shape of a sealing surface, is not easy to flow and has certain cohesiveness; can play at least one or more of the functions of leakage prevention, water prevention, vibration prevention, sound insulation and the like.
The silicone sealant is a paste prepared by mixing polydimethylsiloxane as a main raw material, a cross-linking agent, a filler, a plasticizer, a coupling agent and a catalyst in a vacuum state. Chinese invention patent 201110223644.3 discloses an acidic silicone sealant which is prepared from polysiloxane terminated with α - ω -dihydroxy: 50-80 parts of a cross-linking agent: 2-10 parts of filler: 2-15 parts of catalyst: 0.1-0.2 part of plasticizer: 1-20 parts, adhesion promoter: 0-5 parts of raw materials, and the curing agent is prepared by mixing the raw materials in a vacuum state, and has the advantages of stable storage, high curing speed and the like. However, it lacks flame-retardant and flame-retardant effects, and continues to improve.
In order to improve the fireproof effect of the silicone sealant, adding a flame retardant into the silicone sealant is a common solution; however, the inventor researches to show that the flame retardant effect is not good when the flame retardant is randomly selected in the preparation process of the silicone sealant; if the flame retardant effect needs to be improved, the dosage of the flame retardant is necessarily greatly increased; however, the adhesive properties of silicone sealants are reduced as a result of increasing the amount of flame retardant. Therefore, how to realize the flame retardant effect by only adding a small amount of flame retardant is a technical problem to be solved for developing the flame retardant fireproof silicone sealant.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a flame-retardant fireproof sealant.
The technical scheme for solving the technical problems is as follows:
a flame-retardant fireproof sealant comprises the following raw material components in parts by weight,
80-100 parts of polydimethylsiloxane; 5-10 parts of a cross-linking agent; 0.5-2 parts of a catalyst; 3-6 parts of a dispersing agent; 1-10 parts of a plasticizer; 1-5 parts of a flame retardant;
the flame retardant consists of zinc borate and anhydrous magnesium carbonate.
Different raw materials are adopted to prepare the flame-retardant fireproof sealant, and different flame retardants are required to be selected to achieve an ideal fireproof effect; in the invention, a great deal of research shows that in the process of preparing the flame-retardant fireproof sealant by taking polydimethylsiloxane as a raw material, a flame retardant consisting of zinc borate and anhydrous magnesium carbonate is adopted, and a certain fireproof flame-retardant effect can be realized under the condition of only adding 1-5 parts of the flame retardant.
Preferably, the flame-retardant fireproof sealant comprises the following raw material components in parts by weight,
80-90 parts of polydimethylsiloxane; 6-8 parts of a crosslinking agent; 1-2 parts of a catalyst; 3-4 parts of a dispersing agent; 3-6 parts of a plasticizer; 2-3 parts of a flame retardant.
Most preferably, the flame-retardant fireproof sealant comprises the following raw material components in parts by weight,
85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
Preferably, the weight ratio of zinc borate to magnesium carbonate in the flame retardant is 3-5;
most preferably, the weight ratio of the zinc borate to the magnesium carbonate in the flame retardant is 4.
Preferably, the flame retardant is a modified flame retardant, and the modified flame retardant is prepared by the following method:
dispersing zinc borate and magnesium carbonate in 40-60% ethanol water solution, adding N- (2-aminoethyl) -3-aminopropyl trimethoxy silane and sodium lignosulphonate, and stirring uniformly; then grinding for 5-10 hours at the temperature of 40-60 ℃; and after grinding is finished, drying the grinding slurry to obtain the modified flame retardant.
Further preferably, the ratio of the total weight of the zinc borate and the magnesium carbonate to the weight of the ethanol water solution, the N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and the sodium lignosulfonate is 100g: 300-600 mL: 5-10 g:3 to 6g.
Most preferably, the ratio of the total weight of zinc borate and magnesium carbonate to the weight of the aqueous ethanol solution and the weight of N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate is 100g:500mL:6g:4g of the total weight.
The inventor further researches show that the flame retardant consisting of zinc borate and anhydrous magnesium carbonate, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate are ground and modified in an ethanol water solution to obtain the modified flame retardant, so that the flame retardant effect of the flame-retardant fireproof sealant prepared by taking polydimethylsiloxane as a raw material can be further greatly improved.
The invention also provides a preparation method of the flame-retardant fireproof sealant, which is prepared by the following steps:
firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 10-30 min under the vacuum degree of-0.05-0.08 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 100-200 min under the vacuum degree of-0.08-0.1 Mpa to obtain the flame-retardant fireproof sealant.
Preferably, the preparation method of the flame-retardant fireproof sealant is prepared by the following steps:
firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
Has the advantages that: the invention provides a fire retardant with a brand-new composition, which is prepared by taking polydimethylsiloxane as a raw material; the fire retardant consisting of zinc borate and anhydrous magnesium carbonate is added, and a certain fire-proof and fire-retardant effect can be realized under the condition that only 1-5 parts of the fire retardant is added.
Detailed Description
The present invention will be further explained with reference to specific examples, which are not intended to limit the present invention in any way.
The polydimethylsiloxanes in the following examples are those having a viscosity (cp at 25 ℃) of 5000; the cross-linking agent is selected from methyl tributyl ketoxime silane; the catalyst is selected from dibutyltin dilaurate; the plasticizer is selected from liquid polybutadiene; the dispersant is selected from calcium stearate. The raw materials in the examples are all conventional raw materials which can be obtained by those skilled in the art through purchase.
EXAMPLE 1 preparation of flame retardant, fire retardant sealant
The raw materials comprise the following components in parts by weight: 85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
The flame retardant consists of zinc borate and magnesium carbonate in a weight ratio of 4;
the preparation method of the flame-retardant fireproof sealant comprises the following steps: firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
EXAMPLE 2 preparation of flame retardant fire sealant
The raw materials comprise the following components in parts by weight: 85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
The flame retardant is a modified flame retardant, and the modified flame retardant is prepared by the following method: dispersing zinc borate and magnesium carbonate (the weight ratio of the zinc borate to the magnesium carbonate is 4: 1) in an ethanol water solution with the volume fraction of 50%, adding N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulphonate, and uniformly stirring; then grinding for 8 hours at the temperature of 50 ℃; drying the grinding slurry after grinding to obtain the modified flame retardant; wherein the dosage ratio of the total weight of the zinc borate and the magnesium carbonate to the ethanol water solution, the N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and the sodium lignosulfonate is 100g:500mL:6g:4g of the total weight.
The preparation method of the flame-retardant fireproof sealant comprises the following steps: firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
Comparative example 1 preparation of flame-retardant and fireproof sealant
The raw materials comprise the following components in parts by weight: 85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
The flame retardant is zinc borate;
the preparation method of the flame-retardant fireproof sealant comprises the following steps: firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
Comparative example 1 differs from example 1 in that comparative example 1 uses only zinc borate as a flame retardant; while example 1 uses zinc borate and magnesium carbonate as flame retardants.
Comparative example 2 preparation of flame-retardant and fire-retardant sealant
The raw materials comprise the following components in parts by weight: 85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
The flame retardant is magnesium carbonate;
the preparation method of the flame-retardant fireproof sealant comprises the following steps: firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
Comparative example 2 differs from example 1 in that comparative example 2 uses only magnesium carbonate as a flame retardant; while example 1 uses zinc borate and magnesium carbonate as flame retardants.
Comparative example 3 preparation of flame-retardant and fire-retardant sealant
The raw materials comprise the following components in parts by weight: 85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
The flame retardant is a modified flame retardant, and the modified flame retardant is prepared by the following method: dispersing zinc borate and magnesium carbonate (the weight ratio of zinc borate to magnesium carbonate is 4: 1) in an ethanol aqueous solution with a volume fraction of 50%, followed by grinding at a temperature of 50 ℃ for 8 hours; drying the grinding slurry after grinding to obtain the modified flame retardant; wherein the dosage ratio of the total weight of the zinc borate and the magnesium carbonate to the ethanol water solution is 100g:500mL.
The preparation method of the flame-retardant fireproof sealant comprises the following steps: firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
Comparative example 3 is different from example 2 in the preparation method of the modified flame retardant; comparative example 3 zinc borate and magnesium carbonate were merely ground in an aqueous ethanol solution without the addition of N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate; in example 2, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate were added during the grinding of zinc borate and magnesium carbonate.
Comparative example 4 preparation of flame-retardant and fireproof sealant
The raw materials comprise the following components in parts by weight: 85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
The flame retardant is a modified flame retardant, and the modified flame retardant is prepared by the following method: dispersing zinc borate and magnesium carbonate (the weight ratio of the zinc borate to the magnesium carbonate is 4: 1) in an ethanol water solution with the volume fraction of 50%, and then adding N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and uniformly stirring; then grinding for 8 hours at the temperature of 50 ℃; drying the grinding slurry after grinding to obtain the modified flame retardant; wherein the dosage ratio of the total weight of the zinc borate and the magnesium carbonate to the ethanol water solution and the N- (2-aminoethyl) -3-aminopropyltrimethoxysilane is 100g:500mL:10g.
The preparation method of the flame-retardant fireproof sealant comprises the following steps: firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
Comparative example 4 is different from example 2 in the preparation method of the modified flame retardant; in comparative example 4, only N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and no sodium lignosulfonate were added to the zinc borate and magnesium carbonate during the milling process. In example 2, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate were added during the grinding process to the zinc borate and magnesium carbonate.
Comparative example 5 preparation of flame-retardant and fireproof sealant
The raw materials comprise the following components in parts by weight: 85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
The flame retardant is a modified flame retardant, and the modified flame retardant is prepared by the following method: dispersing zinc borate and magnesium carbonate (the weight ratio of the zinc borate to the magnesium carbonate is 4: 1) in an ethanol water solution with the volume fraction of 50%, and then adding sodium lignosulphonate and stirring uniformly; then grinding for 8 hours at the temperature of 50 ℃; drying the grinding slurry after grinding to obtain the modified flame retardant; wherein the ratio of the total weight of the zinc borate and the magnesium carbonate to the amount of the ethanol aqueous solution and the sodium lignosulphonate is 100g:500mL:10g.
The preparation method of the flame-retardant fireproof sealant comprises the following steps: firstly, putting polydimethylsiloxane, a dispersing agent and a flame retardant into a high-speed stirrer, and stirring for 20min under the vacuum degree of-0.06 Mpa; then adding a cross-linking agent and a catalyst, and stirring for 150min under the vacuum degree of-0.08 Mpa to obtain the flame-retardant fireproof sealant.
Comparative example 5 is different from example 2 in the preparation method of the modified flame retardant; in comparative example 5, zinc borate and magnesium carbonate were ground with only sodium lignosulfonate and no N- (2-aminoethyl) -3-aminopropyltrimethoxysilane added. In example 2, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate were added during the grinding process to the zinc borate and magnesium carbonate.
Experimental example 1
Preparing the flame-retardant fireproof sealant prepared in the examples 1 and 2 and the comparative examples 1 to 5 into a sample strip with the length of 100mm, the width of 6mm and the thickness of 3 mm; testing the lowest oxygen concentration (oxygen index) required by the flame-retardant fireproof sealant sample strip for maintaining balanced combustion in the oxygen-nitrogen mixed gas flow by referring to GB/T2406.2-2009; wherein, the higher the oxygen index is, the better the fireproof and flame-retardant effects are; the test results are shown in Table 1.
TABLE 1 test of fire-retardant, and sealant fire-retardant effects
As can be seen from the test data in Table 1, the flame-retardant and fireproof sealant in example 1 has a significantly better flame-retardant and fireproof effect than that in comparative examples 1 and 2, which shows that the flame-retardant and fireproof sealant is prepared by using polydimethylsiloxane as a raw material and adding a flame retardant consisting of zinc borate and magnesium carbonate; the flame-retardant and fireproof effects of the flame-retardant and fireproof composite material are obviously better than those of the flame-retardant and fireproof composite material which is independently added with zinc borate or magnesium carbonate. The zinc borate and the magnesium carbonate play a role in synergistic flame retardance in the process of preparing the flame-retardant fireproof sealant by taking the polydimethylsiloxane as a raw material.
As can be seen from the test data in Table 1, the flame-retardant and fireproof effect of the flame-retardant and fireproof sealant in example 2 is greatly improved compared with that in example 1; the flame retardant consisting of zinc borate and magnesium carbonate is a modified flame retardant obtained by grinding the flame retardant in an ethanol water solution containing N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate; compared with the unmodified flame retardant, the flame retardant and fireproof effects of the prepared fireproof sealant are greatly improved.
As can be seen from the test data in Table 1, the flame-retardant and fireproof effect of the flame-retardant and fireproof sealant in the comparative example 3 is equivalent to that of the example 1 and is not obviously improved; the method for preparing the modified flame retardant plays a decisive role in improving the flame-retardant and fireproof effects of the flame-retardant and fireproof sealant; the flame-retardant and fireproof effect of the flame-retardant and fireproof sealant cannot be effectively improved only by putting the zinc borate and the magnesium carbonate into the ethanol water solution for grinding to prepare the modified flame retardant.
As can be seen from the test data in Table 1, the flame-retardant and fireproof effects of the flame-retardant and fireproof sealant in comparative examples 4 and 5 are improved compared with that in example 1, but the improvement range is not large and is far smaller than that in example 2; the method for preparing the modified flame retardant plays a decisive role in improving the flame-retardant and fireproof effects of the flame-retardant and fireproof sealant; the modified flame retardant prepared by grinding zinc borate and magnesium carbonate into an ethanol aqueous solution only containing N- (2-aminoethyl) -3-aminopropyltrimethoxysilane or only containing sodium lignosulfonate can not greatly improve the flame-retardant and fireproof effects of the flame-retardant and fireproof sealant; the flame-retardant and fireproof effect of the flame-retardant and fireproof sealant can be greatly improved only by putting the zinc borate and the magnesium carbonate into an ethanol water solution which simultaneously contains N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulfonate and grinding the modified flame retardant.
Claims (7)
1. The flame-retardant fireproof sealant is characterized by comprising the following raw material components in parts by weight,
80-100 parts of polydimethylsiloxane; 5-10 parts of a crosslinking agent; 0.5 to 2 portions of catalyst; 3-6 parts of a dispersing agent; 1 to 10 parts of a plasticizer; 1 to 5 parts of a flame retardant;
the flame retardant consists of zinc borate and anhydrous magnesium carbonate; the weight ratio of zinc borate to magnesium carbonate in the flame retardant is 3-5.
2. The flame-retardant fireproof sealant according to claim 1, which comprises the following raw material components in parts by weight,
80-90 parts of polydimethylsiloxane; 6-8 parts of a crosslinking agent; 1 to 2 parts of a catalyst; 3 to 4 parts of a dispersing agent; 3-6 parts of a plasticizer; 2-3 parts of a flame retardant.
3. The flame-retardant fireproof sealant according to claim 1, which comprises the following raw material components in parts by weight,
85 parts of polydimethylsiloxane; 8 parts of a crosslinking agent; 1 part of a catalyst; 3 parts of a dispersing agent; 5 parts of a plasticizer; and 3 parts of a flame retardant.
4. The flame-retardant fireproof sealant according to claim 1, wherein the weight ratio of zinc borate to magnesium carbonate in the flame retardant is 4.
5. The flame-retardant fireproof sealant is characterized by comprising the following raw material components in parts by weight,
80-100 parts of polydimethylsiloxane; 5-10 parts of a crosslinking agent; 0.5 to 2 portions of catalyst; 3-6 parts of a dispersing agent; 1 to 10 parts of a plasticizer; 1 to 5 parts of a flame retardant;
the flame retardant is prepared by the following method:
dispersing zinc borate and magnesium carbonate in 40-60% ethanol aqueous solution by volume fraction, adding N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and sodium lignosulphonate, and uniformly stirring; grinding at 40-60 ℃ for 5-10 hours; drying the grinding slurry after grinding to obtain the flame retardant;
wherein the weight ratio of the zinc borate to the magnesium carbonate is 3-5.
6. The flame-retardant and fireproof sealant according to claim 5, wherein the ratio of the total weight of the zinc borate and the magnesium carbonate to the amount of the ethanol aqueous solution and the N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and the sodium lignosulfonate is 100g:300 to 600mL:5 to 10g:3 to 6g.
7. The flame-retardant and fireproof sealant according to claim 5, wherein the ratio of the total weight of the zinc borate and the magnesium carbonate to the amount of the ethanol aqueous solution and the N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and the sodium lignosulfonate is 100g:500mL:6g:4g of the total weight of the composition.
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| CN108977165A (en) * | 2018-06-28 | 2018-12-11 | 芜湖市棠华建材科技有限公司 | Fireproofing flame retardant sealant |
| CN109666446A (en) * | 2018-11-14 | 2019-04-23 | 佛山市金德利粘胶有限公司 | A kind of flame-retardant modified silicone sealant and preparation method thereof |
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