CN117702497A - Preparation method of flame retardant aerogel-loaded composite PVA water-based fireproof coating - Google Patents
Preparation method of flame retardant aerogel-loaded composite PVA water-based fireproof coating Download PDFInfo
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 77
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000004964 aerogel Substances 0.000 title claims abstract description 72
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 7
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- 238000000034 method Methods 0.000 claims description 9
- 235000019441 ethanol Nutrition 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims description 5
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- ITYXXSSJBOAGAR-UHFFFAOYSA-N 1-(methylamino)-4-(4-methylanilino)anthracene-9,10-dione Chemical compound C1=2C(=O)C3=CC=CC=C3C(=O)C=2C(NC)=CC=C1NC1=CC=C(C)C=C1 ITYXXSSJBOAGAR-UHFFFAOYSA-N 0.000 claims description 3
- MTEZSDOQASFMDI-UHFFFAOYSA-N 1-trimethoxysilylpropan-1-ol Chemical compound CCC(O)[Si](OC)(OC)OC MTEZSDOQASFMDI-UHFFFAOYSA-N 0.000 claims description 3
- -1 Phenyl- Chemical group 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 238000006136 alcoholysis reaction Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 2
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 2
- JBTHDAVBDKKSRW-UHFFFAOYSA-N chembl1552233 Chemical group CC1=CC(C)=CC=C1N=NC1=C(O)C=CC2=CC=CC=C12 JBTHDAVBDKKSRW-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 125000005670 ethenylalkyl group Chemical group 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 229940073450 sudan red Drugs 0.000 claims description 2
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 239000000463 material Substances 0.000 description 11
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
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- FHNINJWBTRXEBC-UHFFFAOYSA-N Sudan III Chemical compound OC1=CC=C2C=CC=CC2=C1N=NC(C=C1)=CC=C1N=NC1=CC=CC=C1 FHNINJWBTRXEBC-UHFFFAOYSA-N 0.000 description 3
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- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 3
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Landscapes
- Paints Or Removers (AREA)
Abstract
The invention discloses a preparation method of a flame retardant aerogel-loaded composite PVA water-based fireproof coating, which comprises the steps of uniformly mixing tetraethoxysilane, phenyl triethoxysilane and polyethylene glycol in a solvent, adding a catalyst, heating to 80 ℃ for reaction for 5 hours, and obtaining Phenyl-PEG-PEOS through purification after-treatment; mixing Phenyl-PEG-PEOS and flame retardant in deionized water, adding concentrated ammonia water for hydrolysis condensation reaction, and purifying to obtain SiO carrying flame retardant 2 Aerogel particles; adding silane coupling agent into SiO loaded with flame retardant 2 Heating aerogel particles to 60 ℃ and stirring for 6 hours to obtain modified SiO 2 Aerogel particles; modified SiO 2 The aerogel particles are uniformly dispersed in the polyvinyl alcohol solution and stirred for 2 hours at 60 ℃ to obtain the flame retardant-loaded materialSiO 2 Aerogel composite PVA water-based fireproof paint.
Description
Technical Field
The invention belongs to the technical field of fireproof coatings, and particularly relates to a preparation method of a flame retardant aerogel-loaded composite PVA water-based fireproof coating.
Background
The fireproof cloth has the functions of fireproof, heat insulation, heat preservation, fire spreading prevention and the like, is an important fire-fighting safety material, has important significance in protecting the life and property safety of people, and is widely applied to the fields of buildings, automobiles, aviation, military, chemical industry, electronics and the like. Common fireproof cloth materials mainly comprise glass fibers, asbestos materials, chemical fiber materials and the like, and the materials show good fireproof performance, but a large amount of toxic and harmful gas substances can be generated or molten drops are generated in the fireproof process, so that secondary injury is easily caused, and the rescue difficulty is increased.
In order to avoid secondary injury generated when the traditional fireproof material is used for fire fighting, the research of the green environment-friendly fireproof cloth material is receiving more and more attention. As a novel flame-retardant heat-insulating fireproof material, the silica aerogel has the characteristic of green environmental protection and is widely focused in the industry. The silicon dioxide has good flame-retardant and fireproof properties, and the heat insulation effect of the silicon dioxide can be obviously improved when the silicon dioxide is prepared into an aerogel form. However, silica aerogel has the disadvantage of easy pulverization, namely the porous structure is damaged, the exertion of the fireproof performance effect is greatly limited, and the silica aerogel can not be filled into a polymer as a filler to form a fireproof coating material, so that the practical application of the silica aerogel is restricted.
Disclosure of Invention
Aiming at the restriction of application performance of silica aerogel in fireproof paint, the invention aims to provide a flame retardant-loaded SiO with excellent fireproof performance 2 Preparation method of aerogel particle composite PVA water-based fireproof coating
In order to achieve the above purpose, the following technical scheme is adopted:
the preparation method of the flame retardant aerogel-loaded composite PVA water-based fireproof coating comprises the following steps:
(1) Uniformly mixing Tetraethoxysilane (TEOS), phenyl triethoxysilane and polyethylene glycol (PEG) in a solvent, adding a catalyst, heating to 85-98 ℃ for reaction for 4-6h, and obtaining Phenyl-PEG-PEOS through purification after-treatment;
(2) Mixing Phenyl-PEG-PEOS and flame retardant in deionized water, adding concentrated ammonia water for hydrolysis condensation reaction, and purifying to obtain SiO carrying flame retardant 2 Aerogel particles;
(3) Adding silane coupling agent into SiO loaded with flame retardant 2 Heating aerogel particles to 55-65 ℃ and stirring for 5-7h to obtain modified SiO 2 Aerogel particles;
(4) Modified SiO 2 The aerogel particles are evenly dispersed in polyvinyl alcohol (PVA) solution and stirred for 1 to 3 hours at the temperature of 55 to 65 ℃ to obtain SiO loaded with flame retardant 2 Aerogel composite PVA water-based fireproof paint.
According to the above scheme, the phenyltriethoxysilane described in step 1 is replaced by a compound having the formula R-Si (OC 2 H 5 ) n Monomer of (a); wherein R is alkyl, vinyl alkyl, or Phenyl- (Phenyl-) or the like.
According to the scheme, the solvent in the step 1 is ethanol, isopropanol or propylene glycol methyl ether.
According to the scheme, the catalyst in the step 1 is acid or alkali, and the molar concentration is 0.01-10 mol/L.
According to the scheme, the flame retardant in the step 2 is one of triphenyl phosphate, isopropylated triphenyl phosphate, ammonium polyphosphate and other halogen-free flame retardants with long-chain structures or large pi-ring structures.
According to the scheme, the raw materials in the steps 1 and 2 are 100 parts of tetraethoxysilane, 25 parts of phenyl triethoxysilane, 22 parts of polyethylene glycol with the molecular weight of 350-550, 5-1000 parts of solvent, 1-20 parts of catalyst, 30-50 parts of flame retardant, 200-500 parts of deionized water and 10-15 parts of 25-27 wt% concentrated ammonia water.
According to the scheme, 0.2-0.4 part of dye is also added in the step 2, wherein the dye is sudan red or sudan blue.
According to the scheme, the silane coupling agent in the step 3 contains hydroxyl; in particular to gamma-glycidoxypropyl trimethoxysilane (KH 560).
According to the scheme, the polyvinyl alcohol in the step 4 is PVA17-99, the polymerization degree is 1799, and the alcoholysis degree is 98% -99%.
According to the scheme, the raw materials in the steps 3 and 4 are calculated according to parts by weight: flame retardant loaded SiO 2 10-70 parts of aerogel particles and 10-20 parts of silane coupling agent; 100 parts of polyvinyl alcohol.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention is used for self-assembling synthesis of SiO of loaded flame retardant 2 The organosilicon precursors of the aerogel particles can be grafted with different side group structures such as phenyl, long-chain alkyl and the like, and the functional group induction effect is utilized, namely, the precursors of different side groups can coat the monomers of corresponding side groups so as to synthesize the aerogel particles with different functionalities. According to the invention, firstly, grafted phenyl is conjugated with phenyl in the flame retardant to obtain aerogel particles stable at normal temperature, and then, the excellent sizing performance of PVA is utilized to enable the aerogel particles to be tightly combined on the surface of cotton fabrics, so that the compression roller is leveled, and the flame retardance of the fabrics can be obviously improved by coating and curing.
(2) According to the invention, the polyvinyl alcohol has good film forming property, the film can be paved on the surface of the fabric, a large amount of aerogel particles loaded with flame retardant and lipophilic dye are stacked and filled, and the aerogel particles are used as spraying sites of the flame retardant after encountering open fire, so that the instant flame retardant effect is realized; and because the aerogel particles are provided with cavities, the barrier type heat insulation effect is achieved by layer-by-layer assembly.
(3) When the aerogel particles are prepared, the added conventional lipophilic dyes sudan red III or sudan blue II and the like can be synchronously packaged in the aerogel particles along with the flame retardant, so that the color development of the fabric coating can be realized, and a clear printing and dyeing effect is generated.
Drawings
Fig. 1: flame retardant loaded SiO 2 Aerogel particle synthesis mechanism diagram.
Fig. 2: (a) And (b) SiO supporting flame retardant respectively 2 Scanning electron microscope contrast graph after aerogel particles and internal flame retardant release.
Fig. 3: (a) And (b) is a scanning electron microscope image and a physical image after FR-3 sintering respectively.
Fig. 4: (a) And (b) SiO loaded with flame retardant in different proportions 2 Aerogel particle composite PVA water-based fireproof color coating and SiO loaded with flame retardant 2 Thermogravimetric analysis curve of aerogel particles.
Fig. 5: nuclear magnetic hydrogen spectrogram of Ph-PEG-PEOS.
Fig. 6: siO with 0% and 50% loading of flame retardant 2 Specific surface area adsorption-desorption (BET) curve of aerogel particles.
Fig. 7: siO loaded with flame retardant in different proportions 2 Vertical burning pictures of aerogel particle composite PVA water-based fireproof color paint.
Fig. 8: (a) And (b) SiO supporting flame retardant respectively 2 Aerogel particles and flame retardant-loaded SiO 2 Photographs of aerogel composite PVA water-based fire retardant coatings.
Detailed Description
The following examples further illustrate the technical aspects of the present invention, but are not intended to limit the scope of the present invention.
The specific embodiment provides a flame retardant-loaded SiO 2 The preparation process of the aerogel particles comprises the following steps:
100 parts of Tetraethoxysilane (TEOS), 30 parts of phenyltriethoxysilane and 20 parts of PEG-350 are respectively added into 60 parts of absolute ethyl alcohol by weight, stirred for 10 minutes at the speed of 600rpm, uniformly mixed, mixed solution of 6 parts of concentrated hydrochloric acid (37 wt.%) and 10 parts of deionized water is added by taking hydrochloric acid as a catalyst, the mixture is heated at 80 ℃ and kept for 5 hours, vacuum pumping is carried out at 80 ℃ to evaporate free ethanol and small molecular substances, colorless and transparent Ph-PEG-PEOS is obtained, the hyperbranched structure of which can be characterized by nuclear magnetic resonance, and the Ph-PEG-PEOS is shown in figure 5 1 H-NMR spectra wherein the peak area ratio of phenyl, grafted PEG terminal ethoxy and PEOS residual ethoxy is 3:14:8, 8; uniformly mixing 10 parts of Ph-PEG-PEOS, 5 parts of flame retardant isopropylated triphenyl phosphate and 0.02 part of dye sudan red III, adding into 190 parts of deionized water, stirring at 600rpm for 0.5h, uniformly dispersing, and adding 10 parts of concentrated ammonia water(25 wt.% -27 wt.%) and making hydrolytic condensation, after 24 hr reaction, making centrifugal action so as to obtain the invented flame-retardant loaded SiO 2 Aerogel particles. Flame retardant loaded SiO 2 The aerogel particles were synthesized by the mechanism shown in FIG. 1. For SiO loaded with flame retardant 2 The aerogel particles were subjected to thermogravimetric analysis, and the result is shown in fig. 4 (b), with a flame retardant loading of 50%; the specific surface area and the porosity of aerogel particles containing no flame retardant and having a loading of 50% were measured by the adsorption/desorption method, respectively, and the result is shown in FIG. 6, and the specific surface area integral was 500m 2 /g and 150m 2 /g; further, the morphology of the aerogel particles before and after releasing the flame retardant was observed by a scanning electron microscope, and the results are shown in fig. 2 (a) and (b), from which it is clear that the flame retardant-loaded SiO 2 The spherical structure of the aerogel particles is unchanged under the action of high temperature, which indicates that the SiO loaded with the flame retardant 2 Aerogel particles have high temperature resistance.
Example 1
(1) 10 parts of the SiO loaded with the flame retardant is prepared 2 Dispersing aerogel particles in 50 parts of deionized water, slowly adding ethanol solution of KH560 (KH 560:2 parts, ethanol: 4 parts), heating to 60deg.C, and stirring at 600rpm for 6 hr to obtain modified flame retardant-loaded SiO 2 Aerogel particles.
(2) SiO of the obtained modified load flame retardant 2 The aerogel particles are uniformly dispersed in 100 parts of PVA solution, and stirred at 200rpm at 60 ℃ to obtain SiO loaded with flame retardant 2 Aerogel particles composite PVA water-based fireproof color paint. The sample obtained at this time was designated as FR-1.
Example 2
Weighing SiO loaded with flame retardant according to the weight parts of the raw materials 2 30 parts of aerogel particles, 6 parts of silane coupling agent containing hydroxyl groups such as gamma-glycidyl ether oxypropyl trimethoxy silane (KH 560), 100 parts of polyvinyl alcohol and the rest of operation are unchanged. The sample was designated FR-2.
Example 3
Weighing SiO loaded with flame retardant according to the weight parts of the raw materials 2 Aerogel particles 50 parts, gamma-glycidol ether oxypropyl trimethoxysilane(KH 560) and the like, 10 parts of a hydroxyl-containing silane coupling agent, 100 parts of polyvinyl alcohol, and the rest of the operation are unchanged. The sample was designated FR-3. FR-3 is sintered to improve the compactness of the material, and fig. 3 (a) and (b) are respectively a scanning electron microscope image and a physical image after the paint is sintered.
Example 4
70 parts of SiO2 aerogel particles loaded with a flame retardant, 14 parts of silane coupling agents containing hydroxyl groups such as gamma-glycidoxypropyl trimethoxy silane (KH 560) and the like, 100 parts of polyvinyl alcohol and the rest of operation are weighed according to the weight parts of the raw materials. The sample was designated FR-4.
Example 5
10 parts of silica aerogel particles without any flame retardant, 2 parts of silane coupling agent containing hydroxyl groups such as gamma-glycidoxypropyl trimethoxy silane (KH 560) and the like, 100 parts of polyvinyl alcohol and the rest of operation are weighed according to the weight parts of the raw materials. The sample was designated FR-0.
Example 6
Flame retardant-loaded SiO employed in the examples below 2 The aerogel particles were prepared as follows (in parts by weight): 100 parts of Tetraethoxysilane (TEOS), 30 parts of isobutyl triethoxysilane and 20 parts of PEG-350 are respectively added into 60 parts of absolute ethyl alcohol, stirred for 0.5h at the speed of 600rpm, uniformly mixed, hydrochloric acid is used as a catalyst, mixed liquid of 6 parts of concentrated hydrochloric acid (37 wt%) and 10 parts of deionized water is added, after heating and heat preservation for 5h at 80 ℃, vacuumizing is carried out at 80 ℃, and free ethanol is distilled out, so that colorless and transparent i-Bu-PEG-PEOS is obtained; uniformly mixing 10 parts of i-Bu-PEG-PEOS, 5 parts of isopropyl triphenyl phosphate serving as a flame retardant and 0.02g of dye sudan red III, adding the mixture into 190 parts of deionized water, stirring at 600rpm for 3min, uniformly dispersing, adding 10 parts of concentrated ammonia water (25-27 wt.%), performing hydrolytic condensation, reacting for 24h, and centrifuging to obtain the SiO carrying the flame retardant 2 Aerogel particles.
(1) 10 parts of the SiO loaded with the flame retardant is prepared 2 Dispersing aerogel particles in 50 parts deionized water, slowly adding KH560 ethanol solution (KH 560:2 parts ethanol: 4 parts), heating to 60deg.C, and stirring at 600rpm for 6 hr to obtain epoxy modified epoxyFlame retardant loaded SiO 2 Aerogel particles as shown in fig. 8 (a).
(2) 10 parts of modified flame retardant-loaded SiO 2 The aerogel particles are uniformly dispersed in PVA solution, and stirred at 200rpm at 60 ℃ to obtain SiO loaded with flame retardant 2 Aerogel particles composite PVA water-based fire-retardant color coating as shown in fig. 8 (b).
The composite PVA coating materials prepared in examples 1 to 5 were subjected to thermogravimetric analysis, limiting oxygen index test and vertical burning test, wherein the thermogravimetric analysis curve is shown in fig. 4 (a), the vertical burning condition is shown in fig. 7, and the experimental results are shown in table 1.
TABLE 1
The results of the heat insulating properties when the thickness of the coating materials in examples 1 to 4 was increased by 10 times to 4mm are shown in Table 2.
TABLE 2
| Sample name | Thermal conductivity (W/m.k, 20 ℃ C.) |
| FR-1 | 0.053±0.003 |
| FR-2 | 0.050±0.003 |
| FR-3 | 0.031±0.003 |
| FR-4 | 0.029±0.003 |
It is apparent that the above examples are only examples given for clarity of illustration and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And thus obvious variations or modifications to the disclosure are within the scope of the invention.
Claims (10)
1. The preparation method of the flame retardant aerogel-loaded composite PVA water-based fireproof coating is characterized by comprising the following steps of:
(1) Uniformly mixing Tetraethoxysilane (TEOS), phenyl triethoxysilane and polyethylene glycol (PEG) in a solvent, adding a catalyst, heating to 85-98 ℃ for reaction for 4-6h, and obtaining Phenyl-PEG-PEOS through purification after-treatment;
(2) Mixing Phenyl-PEG-PEOS and flame retardant in deionized water, adding concentrated ammonia water for hydrolysis condensation reaction, and purifying to obtain SiO carrying flame retardant 2 Aerogel particles;
(3) Adding silane coupling agent into SiO loaded with flame retardant 2 Heating aerogel particles to 55-65 ℃ and stirring for 5-7h to obtain modified SiO 2 Aerogel particles;
(4) Modified SiO 2 The aerogel particles are evenly dispersed in polyvinyl alcohol (PVA) solution and stirred for 1 to 3 hours at the temperature of 55 to 65 ℃ to obtain SiO loaded with flame retardant 2 Aerogel composite PVA water-based fireproof paint.
2. The method for preparing the flame retardant aerogel loaded composite PVA water-based fireproof coating according to claim 1, wherein the phenyltriethoxysilane in the step 1 is replaced by a compound having a molecular formula of R-Si (OC) 2 H 5 ) n Monomer of (a); wherein R is alkyl, vinyl alkyl, or Phenyl- (Phenyl-) or the like.
3. The method for preparing the flame retardant aerogel-loaded composite PVA water-based fireproof coating according to claim 1, wherein the solvent in the step 1 is ethanol, isopropanol or propylene glycol methyl ether.
4. The method for preparing the flame retardant aerogel-loaded composite PVA water-based fireproof coating according to claim 1, wherein the catalyst in the step 1 is acid or alkali, and the molar concentration is 0.01-10 mol/L.
5. The method for preparing the flame retardant aerogel loaded composite PVA water-based fireproof coating according to claim 1, wherein the flame retardant in the step 2 is one of triphenyl phosphate, isopropylated triphenyl phosphate, ammonium polyphosphate and other halogen-free flame retardants with long chain structures or large pi-ring structures.
6. The preparation method of the flame retardant aerogel loaded composite PVA water-based fireproof coating according to claim 1, wherein in the steps 1 and 2, the raw materials are 100 parts of tetraethoxysilane, 25 parts of phenyltriethoxysilane, 22 parts of polyethylene glycol with the molecular weight of 350-550, 5-1000 parts of solvent, 1-20 parts of catalyst, 30-50 parts of flame retardant, 200-500 parts of deionized water and 10-15 parts of 25-27 wt% concentrated ammonia water according to parts by weight.
7. The method for preparing the flame retardant aerogel-loaded composite PVA water-based fireproof coating according to claim 1, wherein 0.2-0.4 part of dye is added in the step 2, and the dye is sudan red or sudan blue.
8. The method for preparing the flame retardant aerogel-loaded composite PVA water-based fireproof coating according to claim 1, wherein the silane coupling agent in the step 3 contains hydroxyl; in particular to gamma-glycidol ether oxypropyl trimethoxy silane.
9. The method for preparing the flame retardant aerogel loaded composite PVA water-based fireproof coating according to claim 1, wherein the polyvinyl alcohol in the step 4 is PVA17-99, the polymerization degree is 1799, and the alcoholysis degree is 98% -99%.
10. The preparation method of the flame retardant aerogel-loaded composite PVA water-based fireproof coating is characterized by comprising the following raw materials in parts by weight in the steps 3 and 4: flame retardant loaded SiO 2 10-70 parts of aerogel particles and 10-20 parts of silane coupling agent; 100 parts of polyvinyl alcohol.
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| CN202311674712.7A CN117702497A (en) | 2023-12-06 | 2023-12-06 | Preparation method of flame retardant aerogel-loaded composite PVA water-based fireproof coating |
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