CN117487432A - Fireproof heat-insulating coating and preparation process thereof - Google Patents
Fireproof heat-insulating coating and preparation process thereof Download PDFInfo
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- CN117487432A CN117487432A CN202311484798.7A CN202311484798A CN117487432A CN 117487432 A CN117487432 A CN 117487432A CN 202311484798 A CN202311484798 A CN 202311484798A CN 117487432 A CN117487432 A CN 117487432A
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- 238000000576 coating method Methods 0.000 title claims abstract description 60
- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 182
- 239000011347 resin Substances 0.000 claims abstract description 182
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 109
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 109
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 109
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000006247 magnetic powder Substances 0.000 claims abstract description 76
- 229920000247 superabsorbent polymer Polymers 0.000 claims abstract description 75
- 239000000945 filler Substances 0.000 claims abstract description 62
- 239000002131 composite material Substances 0.000 claims abstract description 58
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000003822 epoxy resin Substances 0.000 claims abstract description 33
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 33
- 238000005507 spraying Methods 0.000 claims abstract description 33
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 26
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 26
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims abstract description 19
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000003063 flame retardant Substances 0.000 claims abstract description 13
- 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 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 154
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 72
- 229910002804 graphite Inorganic materials 0.000 claims description 63
- 239000010439 graphite Substances 0.000 claims description 58
- 239000002250 absorbent Substances 0.000 claims description 50
- 239000000843 powder Substances 0.000 claims description 44
- 238000003756 stirring Methods 0.000 claims description 41
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- 238000007873 sieving Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 23
- 238000000498 ball milling Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000005469 granulation Methods 0.000 claims description 14
- 230000003179 granulation Effects 0.000 claims description 14
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 8
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 8
- 239000010455 vermiculite Substances 0.000 claims description 8
- 235000019354 vermiculite Nutrition 0.000 claims description 8
- 229910052902 vermiculite Inorganic materials 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 7
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 239000010451 perlite Substances 0.000 claims description 6
- 235000019362 perlite Nutrition 0.000 claims description 6
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims description 5
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 5
- 229910000828 alnico Inorganic materials 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 239000008188 pellet Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 17
- 239000003973 paint Substances 0.000 description 16
- 238000003825 pressing Methods 0.000 description 13
- 239000000523 sample Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000004180 red 2G Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 5
- 229910000531 Co alloy Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- -1 aluminum-nickel-cobalt Chemical compound 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 2
- QQGISFDJEJMKIL-JAIQZWGSSA-N (5z)-5-[[3-(hydroxymethyl)thiophen-2-yl]methylidene]-10-methoxy-2,2,4-trimethyl-1h-chromeno[3,4-f]quinolin-9-ol Chemical group C1=CC=2NC(C)(C)C=C(C)C=2C2=C1C=1C(OC)=C(O)C=CC=1O\C2=C/C=1SC=CC=1CO QQGISFDJEJMKIL-JAIQZWGSSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
Classifications
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/23—Magnetisable or magnetic paints or lacquers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a fireproof heat-insulating coating and a preparation process thereof, wherein the fireproof heat-insulating coating comprises a component A and a component B; the component A consists of the following raw materials in parts by weight: 12-18 parts of multilayer composite filler, 12-15 parts of epoxy resin and 10-15 parts of butyl acetate; 20-35 parts of dichloromethane; the component B consists of the following raw materials in parts by weight: 55-60 parts of water, 3-5 parts of polyvinyl alcohol, 4-8 parts of hard magnetic powder, 15-22 parts of expansion heat insulation filler and 3-5 parts of flame retardant; the multi-layer composite filler consists of the following raw materials in parts by weight: 5-10 parts of hard magnetic powder, 5-7 parts of expanded graphite powder, 6-9 parts of SAP (super absorbent polymer) and 1-3 parts of EVA (ethylene vinyl acetate) resin; the SAP water-absorbing resin and the hard magnetic powder are adhered to the two sides of the expanded graphite powder, and the magnetic transformation temperature of the hard magnetic powder is lower than the initial expansion temperature of the expanded graphite powder; the invention increases the wet film adhesive force of the coating, is favorable for the spraying construction of the coating, can achieve the effects of gradual expansion and laminar peeling in a high-temperature environment, and improves the durability of the coating against high temperature.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a fireproof heat-insulating coating and a preparation process thereof.
Background
Most of the existing steel structure fireproof heat-insulating paint is formed into a loose porous layer by expansion at high temperature, so that heat is isolated; because the paint contains a large amount of expansion filler for high-temperature expansion, the construction viscosity of the paint is always higher in order to keep the stability of the paint, the formed wet film coating is thicker, and the paint cannot be coated in a spraying mode due to poor adhesive force of the wet film; meanwhile, the coating has a uniform structure, and can only be integrally expanded to form a porous loose layer in a high-temperature environment, so that gradual expansion and laminar peeling cannot be realized, and the durability of the coating against high temperature is relatively poor.
Disclosure of Invention
The invention aims to overcome the defects and provide a fireproof heat-insulating coating and a preparation process thereof.
In order to achieve the above object, the present invention is specifically as follows:
the first aspect of the invention provides a fireproof heat-insulating coating, which comprises a component A and a component B; the component A consists of the following raw materials in parts by weight: 12-18 parts of multilayer composite filler, 12-15 parts of epoxy resin and 10-15 parts of butyl acetate; 20-35 parts of dichloromethane;
the component B consists of the following raw materials in parts by weight: 55-60 parts of water, 3-5 parts of polyvinyl alcohol, 4-8 parts of hard magnetic powder, 15-22 parts of expansion heat insulation filler and 3-5 parts of flame retardant;
wherein the multilayer composite filler consists of the following raw materials in parts by weight: 5-10 parts of hard magnetic powder, 5-7 parts of expanded graphite powder, 6-9 parts of SAP (super absorbent polymer) and 1-3 parts of EVA (ethylene vinyl acetate) resin; the SAP water-absorbing resin and the hard magnetic powder are adhered to the two sides of the expanded graphite powder, and the magnetic transition temperature of the hard magnetic powder is lower than the initial expansion temperature of the expanded graphite powder.
Optionally, the hard magnetic powder comprises at least one of alnico powder, neodymium iron boron powder, manganese zinc ferrite powder.
Optionally, the expanded heat insulating filler comprises at least one of expanded graphite, perlite and expanded vermiculite.
Optionally, the flame retardant comprises at least one of aluminum hydroxide, antimony trioxide and chlorinated paraffin.
The second aspect of the invention provides a preparation process of the fireproof heat-insulating coating, which comprises the following steps:
s1, adding 12-18 parts of multilayer composite filler, 12-15 parts of epoxy resin, 10-15 parts of butyl acetate and 20-35 parts of methylene dichloride into a reaction kettle according to parts by weight, heating, stirring and cooling to obtain a component A;
s2, adding 42-45 parts of water, 4-8 parts of hard magnetic powder, 15-22 parts of expansion heat insulation filler, 3-5 parts of flame retardant, 85-90 parts of 6mm steel ball into a ball mill, adding liquid into a reaction kettle after ball milling is finished, and adding 13-15 parts of water and 3-5 parts of polyvinyl alcohol according to parts by weight; heating, stirring and cooling to obtain a component B;
the multi-layer composite filler is prepared by the following steps:
s21, wrapping EVA resin layers on surfaces of the SAP water-absorbent resin powder, the expanded graphite powder and the hard magnetic powder to obtain SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles;
s22, adding the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles into a tray according to a volume ratio of 2:4:3, mixing, and vibrating to enable the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles to be sequentially stacked in layers to form a layered structure;
s23, compacting the layered structure in the step S22, and then carrying out ultrasonic heating to melt the SAP water-absorbent resin particles, the expanded graphite particles and the EVA resin coated on the outer sides of the hard magnetic powder particles to obtain particle groups;
s24, adding the particle clusters into a dry ball mill, and sieving and separating after ball milling to obtain the multilayer composite filler.
Optionally, in step 21, adding the expanded graphite powder into an acetone solution of EVA resin, sufficiently stirring, then spraying powder for granulation, and sieving with a 500-mesh sieve after finishing to obtain expanded graphite particles with surfaces coated with an EVA resin layer;
adding the hard magnetic powder into an acetone solution of EVA resin, fully stirring, spraying powder for granulation, and sieving with a 200-mesh sieve to obtain hard magnetic powder particles with surfaces coated with an EVA resin layer;
adding the SAP water-absorbing resin powder into an acetone solution of EVA resin, fully stirring, spraying and granulating, and sieving with a 800-mesh sieve to obtain SAP water-absorbing resin particles with surfaces coated with EVA resin layers.
Optionally, in step S1, heating to 40 ℃ at 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at a rotating speed of 80r/min, and cooling to obtain the component A.
Optionally, in step S2, heating to 65deg.C at 2deg.C/min, maintaining the temperature, stirring and mixing at 60r/min for 2-2.5h, and cooling to obtain component B.
Optionally, in step S24, the pellet and the 1mm steel ball are added into a dry ball mill according to a ratio of 1:1, ball milling is performed for 15-30min at 150r/min, so as to peel off the EVA resin layer on the exposed part surface of the SAP water absorbent resin particle, and after completion, the steel ball is separated by sieving, thus obtaining the multilayer composite filler.
The beneficial effects of the invention are as follows: according to the fireproof heat-insulating coating disclosed by the invention, during spraying, the hard magnetic powder of the multilayer composite filler is magnetized, so that the magnetic field adsorption force effect is generated by the hard magnetic powder, the wet film adhesion force of the coating is increased, and meanwhile, the water absorption resin of SAP (super absorbent polymer) is utilized to absorb the water in the coating, so that the viscosity of the coating is rapidly increased, and the initial viscosity of the coating can be lower, so that the spraying construction of the coating is facilitated; after spraying, a layered composite structure of the water-absorbing resin layer, the expanded graphite layer and the hard magnetic powder layer can be formed, so that the effects of gradual expansion and layered stripping can be achieved in a high-temperature environment, and the durability of the coating against high temperature is improved.
Drawings
FIG. 1 is a cross-sectional view of a spray-on steel construction substrate to which the present invention is applied;
FIG. 2 is a cross-sectional view of a composite filler preparing apparatus for preparing a multi-layered composite filler according to an embodiment of the present invention;
reference numerals illustrate: 1. a steel structure substrate; 2. an expanded graphite layer; 3. a hard magnetic powder layer; 4. a water-absorbent resin layer; 5. an intumescent flame retardant layer; 6. a tray; 7. a vibration generator; 8. a pressing plate; 9. an ultrasonic wave combination head; 91. a probe; 10. vibration isolation damping pad.
Detailed Description
The invention will now be described in further detail with reference to the drawings and the specific embodiments, without limiting the scope of the invention.
Example 1
As shown in fig. 1 and 2, the specific implementation process of the fireproof heat-insulating coating according to the embodiment is as follows:
1) Preparing a multi-layer composite filler, wherein the multi-layer composite filler comprises the following components in parts by weight:
1.1, adding 3 parts of EVA resin into 8 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 6 parts of expanded graphite powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 500-mesh sieve after completion to obtain expanded graphite particles with surfaces coated with an EVA resin layer;
adding 3 parts of EVA resin into 8 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 8 parts of aluminum-nickel-cobalt alloy powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 200-mesh sieve after completion to obtain hard magnetic powder particles with surfaces coated with an EVA resin layer;
adding 3 parts of EVA resin into 8 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 7 parts of SAP water-absorbing resin powder into the acetone solution of the EVA resin, fully stirring, spraying and granulating, and sieving with a 800-mesh sieve after finishing to obtain SAP water-absorbing resin particles with surfaces coated with an EVA resin layer;
EVA resin, which is purchased from LG chemical, the model is EA28025, the expanded graphite is purchased from Henan Liujia graphite Co., ltd, the model is LG-3001, the density is 0.85-1.1g/cm3, the expansion temperature is 290-300 ℃, the expansion volume is more than or equal to 230ml/g, the SAP water-absorbing resin is purchased from LG chemical, the model is GS-1000I, and the density is 0.55-0.6g/cm3;
1.2, taking the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles prepared in the step 1.1, adding the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles into a tray 6 according to a volume ratio of 2:4:3, and starting a vibration generator 7 to vibrate after the particles are fully mixed, wherein the diameters and densities among the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles are sequentially increased, in the vibration process, the hard magnetic powder particles with the largest diameters and densities sink to the lowest layer due to the influence of gravity, the expanded graphite particles with the middle diameters and densities are positioned at the middle part, and the SAP water-absorbent resin particles with the smallest diameters and densities are positioned at the top part, so that the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles are sequentially stacked in layers to form a layered structure;
1.3, downward probing through a pressing plate 8, compacting the layered structure, then downward moving through an ultrasonic combination head 9, enabling a probe 91 of the ultrasonic combination head 9 to be pressed against the layered structure, transmitting ultrasonic energy into the layered structure through the probe 91, thereby carrying out ultrasonic heating on the compacted layered structure, enabling friction heating between particles below the probe 91, carrying out ultrasonic treatment for 5-15S, enabling ultrasonic frequency to be 20KHz, enabling the EVA resin coated on the outer sides of the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles to be melted, enabling the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles to be bonded through the EVA resin, bonding the particles below the probe 91 into particle groups of a multilayer structure after cooling, and after completion, sieving mixed particles in a tray 6 by a 50-mesh sieve, and separating to obtain the particle groups;
1.4, adding the particle groups and 1mm steel balls into a dry ball mill according to a ratio of 1:1, ball milling for 15-30min at 150r/min to peel off an EVA resin layer on the exposed part surface of the SAP water absorbent resin particles, sieving and separating the steel balls after completion, and obtaining the multilayer composite filler, wherein the weight part of the EVA resin of the multilayer composite filler is 2 parts.
2) Preparation of fireproof heat-insulating paint
2.1, taking the following raw materials in parts by weight:
13 parts of epoxy resin, 12 parts of butyl acetate, 25 parts of methylene dichloride and 12 parts of the multilayer composite filler prepared in the embodiment; 58 parts of water, 4 parts of polyvinyl alcohol, 6 parts of alnico powder, 20 parts of expanded graphite, 4 parts of aluminum hydroxide and 85 parts of 6mm steel ball; the epoxy resin is purchased from Nanya epoxy resin (Kunshan) limited company, the model is E-128, and the polyvinyl alcohol is purchased from Chongqing Sichuan-Wei chemical industry limited company of China petrochemical group, the model is PVA088-20 (G);
2.2, adding the multilayer composite filler, epoxy resin, butyl acetate and methylene dichloride into a reaction kettle, heating to 40 ℃ at 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at the rotating speed of 80r/min, and cooling to obtain a component A;
adding aluminum-nickel-cobalt alloy powder, expanded graphite, aluminum hydroxide, 6mm steel balls and 45 parts of water into a ball mill, ball milling for 4-4.5 hours at 220r/min, adding the liquid into a reaction kettle after finishing, adding polyvinyl alcohol and 13 parts of water, heating to 65 ℃ at 2 ℃/min, preserving heat, stirring and mixing for 2-2.5 hours at a rotating speed of 60r/min, and cooling to obtain a component B.
In this embodiment, as shown in fig. 2, the tray 6, the vibration generator 7, the pressing plate 8, and the ultrasonic assembly head 9 with the probe 91 together form a composite filler preparation device, the vibration generator 7 is disposed at the bottom of the tray 6, the pressing plate 8 is disposed above the tray 6, so as to compact the layered structure formed on the tray 6, the ultrasonic assembly head is disposed on the pressing plate 8, a plurality of through holes are disposed on the pressing plate 8, vibration isolation damping pads 10 are disposed on each through hole, the vibration isolation damping pads 10 are disposed with through holes for the probe 91 to penetrate, and vibration generated by the ultrasonic assembly head is prevented from being transmitted to the pressing plate 8 to cause vibration of the pressing plate 8 by the vibration isolation damping pads 10, so that the structure is more reliable, the probe 91 of the ultrasonic assembly head penetrates the pressing plate 8 downwards and then stretches into the tray 6, so that ultrasonic energy is transmitted into the tray 6 by the probe 91.
Example 2
As shown in fig. 1 and 2, the specific implementation process of the fireproof heat-insulating coating according to the embodiment is as follows:
1) Preparing a multi-layer composite filler, wherein the multi-layer composite filler comprises the following components in parts by weight:
1.1, adding 3 parts of EVA resin into 7 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 5 parts of expanded graphite powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 500-mesh sieve after completion to obtain expanded graphite particles with surfaces coated with an EVA resin layer;
adding 3 parts of EVA resin into 7 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 10 parts of neodymium-iron-boron alloy powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 200-mesh sieve after completion to obtain hard magnetic powder particles with surfaces coated with an EVA resin layer;
adding 3 parts of EVA resin into 7 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 9 parts of SAP water-absorbing resin powder into the acetone solution of the EVA resin, fully stirring, spraying and granulating, and sieving with a 800-mesh sieve after finishing to obtain SAP water-absorbing resin particles with surfaces coated with an EVA resin layer;
EVA resin, which is purchased from LG chemical, the model is EA28025, the expanded graphite is purchased from Henan Liujia graphite Co., ltd, the model is LG-3001, the density is 0.85-1.1g/cm3, the expansion temperature is 290-300 ℃, the expansion volume is more than or equal to 230ml/g, the SAP water-absorbing resin is purchased from LG chemical, the model is GS-1000I, and the density is 0.55-0.6g/cm3;
1.2, adding the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles prepared in the step 1.1 into a tray 6 according to a volume ratio of 2:4:3, and starting a vibration generator 7 to vibrate after fully mixing, so that the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles are sequentially stacked in layers to form a layered structure;
1.3, probing downwards through a pressing plate 8, compacting the laminated structure, then heating the compacted laminated structure by ultrasonic waves through an ultrasonic wave combination head 9 for 5-15S, melting EVA resin coated on the outer sides of the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles by ultrasonic waves with the frequency of 20KHz, bonding the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles through EVA resin, bonding the particles below the probe 91 into particle groups with a multilayer structure after cooling, and sieving the mixed particles in a tray 6 by a 50-mesh sieve after completing the process, and separating to obtain the particle groups;
1.4, adding the particle groups and 1mm steel balls into a dry ball mill according to a ratio of 1:1, ball-milling for 15-30min at 150r/min to peel off an EVA resin layer on the exposed part surface of the SAP water absorbent resin particles, sieving and separating the steel balls after completion, and obtaining the multilayer composite filler, wherein the weight part of the EVA resin of the multilayer composite filler is 3 parts.
2) Preparation of fireproof heat-insulating paint
2.1, taking the following raw materials in parts by weight:
12 parts of epoxy resin, 10 parts of butyl acetate, 35 parts of methylene dichloride and 18 parts of the multilayer composite filler prepared in the embodiment; 57 parts of water, 5 parts of polyvinyl alcohol, 8 parts of neodymium iron boron alloy powder, 22 parts of perlite, 3 parts of antimonous oxide and 88 parts of 6mm steel ball; the epoxy resin is purchased from Nanya epoxy resin (Kunshan) limited company, the model is E-128, and the polyvinyl alcohol is purchased from Chongqing Sichuan-Wei chemical industry limited company of China petrochemical group, the model is PVA088-20 (G);
2.2, adding the multilayer composite filler, epoxy resin, butyl acetate and methylene dichloride into a reaction kettle, heating to 40 ℃ at 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at the rotating speed of 80r/min, and cooling to obtain a component A;
adding neodymium-iron-boron alloy powder, perlite, antimonous oxide, 6mm steel balls and 42 parts of water into a ball mill, ball milling for 4-4.5 hours at 220r/min, adding the liquid into a reaction kettle after finishing, adding polyvinyl alcohol and 15 parts of water, heating to 65 ℃ at 2 ℃/min, preserving heat, stirring and mixing for 2-2.5 hours at a rotating speed of 60r/min, and cooling to obtain the component B.
Example 3
As shown in fig. 1 and 2, the specific implementation process of the fireproof heat-insulating coating according to the embodiment is as follows:
1) Preparing a multi-layer composite filler, wherein the multi-layer composite filler comprises the following components in parts by weight:
1.1, adding 2 parts of EVA resin into 6 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 7 parts of expanded graphite powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 500-mesh sieve after completion to obtain expanded graphite particles with surfaces coated with an EVA resin layer;
adding 2 parts of EVA resin into 6 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 8 parts of manganese zinc ferrite powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 200-mesh sieve after finishing to obtain hard magnetic powder particles with surfaces coated with an EVA resin layer;
adding 2 parts of EVA resin into 6 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 8 parts of SAP water-absorbing resin powder into the acetone solution of the EVA resin, fully stirring, spraying and granulating, and sieving with a 800-mesh sieve after finishing to obtain SAP water-absorbing resin particles with surfaces coated with an EVA resin layer;
EVA resin, which is purchased from LG chemical, the model is EA28025, the expanded graphite is purchased from Henan Liujia graphite Co., ltd, the model is LG-3001, the density is 0.85-1.1g/cm3, the expansion temperature is 290-300 ℃, the expansion volume is more than or equal to 230ml/g, the SAP water-absorbing resin is purchased from LG chemical, the model is GS-1000I, and the density is 0.55-0.6g/cm3;
1.2, adding the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles prepared in the step 1.1 into a tray 6 according to a volume ratio of 2:4:3, and starting a vibration generator 7 to vibrate after fully mixing, so that the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles are sequentially stacked in layers to form a layered structure;
1.3, probing downwards through a pressing plate 8, compacting the laminated structure, then heating the compacted laminated structure by ultrasonic waves through an ultrasonic wave combination head 9 for 5-15S, melting EVA resin coated on the outer sides of the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles by ultrasonic waves with the frequency of 20KHz, bonding the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles through EVA resin, bonding the particles below the probe 91 into particle groups with a multilayer structure after cooling, and sieving the mixed particles in a tray 6 by a 50-mesh sieve after completing the process, and separating to obtain the particle groups;
1.4, adding the particle groups and 1mm steel balls into a dry ball mill according to a ratio of 1:1, ball milling for 15-30min at 150r/min to peel off an EVA resin layer on the exposed part surface of the SAP water absorbent resin particles, sieving and separating the steel balls after completion, and obtaining the multilayer composite filler, wherein the weight part of the EVA resin of the multilayer composite filler is 2 parts.
2) Preparation of fireproof heat-insulating paint
2.1, taking the following raw materials in parts by weight:
14 parts of epoxy resin, 15 parts of butyl acetate, 20 parts of methylene dichloride and 15 parts of the multilayer composite filler prepared in the embodiment; 57 parts of water, 3 parts of polyvinyl alcohol, 7 parts of manganese zinc ferrite powder, 18 parts of expanded vermiculite, 5 parts of chlorinated paraffin and 90 parts of 6mm steel ball; the epoxy resin is purchased from Nanya epoxy resin (Kunshan) limited company, the model is E-128, and the polyvinyl alcohol is purchased from Chongqing Sichuan-Wei chemical industry limited company of China petrochemical group, the model is PVA088-20 (G);
2.2, adding the multilayer composite filler, epoxy resin, butyl acetate and methylene dichloride into a reaction kettle, heating to 40 ℃ at 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at the rotating speed of 80r/min, and cooling to obtain a component A;
adding manganese zinc ferrite powder, expanded vermiculite, chlorinated paraffin, 6mm steel balls and 43 parts of water into a ball mill, ball milling for 4-4.5 hours at 220r/min, adding the liquid into a reaction kettle after finishing, adding polyvinyl alcohol and 14 parts of water, heating to 65 ℃ at 2 ℃/min, preserving heat, stirring and mixing for 2-2.5 hours at a rotating speed of 60r/min, and cooling to obtain a component B.
Example 4
As shown in fig. 1 and 2, the specific implementation process of the fireproof heat-insulating coating according to the embodiment is as follows:
1) Preparing a multi-layer composite filler, wherein the multi-layer composite filler comprises the following components in parts by weight:
1.1, adding 1 part of EVA resin into 5 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 7 parts of expanded graphite powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 500-mesh sieve after completion to obtain expanded graphite particles with surfaces coated with an EVA resin layer;
adding 1 part of EVA resin into 5 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 5 parts of aluminum-nickel-cobalt alloy powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 200-mesh sieve after completion to obtain hard magnetic powder particles with surfaces coated with an EVA resin layer;
adding 1 part of EVA resin into 5 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 6 parts of SAP water-absorbing resin powder into the acetone solution of the EVA resin, fully stirring, spraying and granulating, and sieving with a 800-mesh sieve after finishing to obtain SAP water-absorbing resin particles with surfaces coated with an EVA resin layer;
EVA resin, which is purchased from LG chemical, the model is EA28025, the expanded graphite is purchased from Henan Liujia graphite Co., ltd, the model is LG-3001, the density is 0.85-1.1g/cm3, the expansion temperature is 290-300 ℃, the expansion volume is more than or equal to 230ml/g, the SAP water-absorbing resin is purchased from LG chemical, the model is GS-1000I, and the density is 0.55-0.6g/cm3;
1.2, adding the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles prepared in the step 1.1 into a tray 6 according to a volume ratio of 2:4:3, and starting a vibration generator 7 to vibrate after fully mixing, so that the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles are sequentially stacked in layers to form a layered structure;
1.3, probing downwards through a pressing plate 8, compacting the laminated structure, then heating the compacted laminated structure by ultrasonic waves through an ultrasonic wave combination head 9 for 5-15S, melting EVA resin coated on the outer sides of the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles by ultrasonic waves with the frequency of 20KHz, bonding the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles through EVA resin, bonding the particles below the probe 91 into particle groups with a multilayer structure after cooling, and sieving the mixed particles in a tray 6 by a 50-mesh sieve after completing the process, and separating to obtain the particle groups;
1.4, adding the particle groups and 1mm steel balls into a dry ball mill according to a ratio of 1:1, ball milling for 15-30min at 150r/min to peel off an EVA resin layer on the exposed part surface of the SAP water absorbent resin particles, sieving and separating the steel balls after completion, and obtaining the multilayer composite filler, wherein the weight part of the EVA resin of the multilayer composite filler is 1 part.
2) Preparation of fireproof heat-insulating paint
2.1, taking the following raw materials in parts by weight:
13 parts of epoxy resin, 13 parts of butyl acetate, 30 parts of methylene dichloride and 16 parts of the multilayer composite filler prepared in the embodiment; 56 parts of water, 3 parts of polyvinyl alcohol, 7 parts of alnico powder, 18 parts of perlite, 5 parts of antimony trioxide and 86 parts of 6mm steel ball; the epoxy resin is purchased from Nanya epoxy resin (Kunshan) limited company, the model is E-128, and the polyvinyl alcohol is purchased from Chongqing Sichuan-Wei chemical industry limited company of China petrochemical group, the model is PVA088-20 (G);
2.2, adding the multilayer composite filler, epoxy resin, butyl acetate and methylene dichloride into a reaction kettle, heating to 40 ℃ at 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at the rotating speed of 80r/min, and cooling to obtain a component A;
adding aluminum-nickel-cobalt alloy powder, perlite, antimonous oxide, 6mm steel balls and 42 parts of water into a ball mill, ball milling for 4-4.5 hours at 220r/min, adding the liquid into a reaction kettle after finishing, adding polyvinyl alcohol and 14 parts of water, heating to 65 ℃ at 2 ℃/min, preserving heat, stirring and mixing for 2-2.5 hours at 60r/min, and cooling to obtain the component B.
Example 5
As shown in fig. 1 and 2, the specific implementation process of the fireproof heat-insulating coating according to the embodiment is as follows:
1) Preparing a multi-layer composite filler, wherein the multi-layer composite filler comprises the following components in parts by weight:
1.1, adding 2 parts of EVA resin into 7 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 9 parts of expanded graphite powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 500-mesh sieve after completion to obtain expanded graphite particles with surfaces coated with an EVA resin layer;
adding 2 parts of EVA resin into 7 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 9 parts of neodymium-iron-boron alloy powder into the acetone solution of the EVA resin, fully stirring, spraying powder for granulation, and sieving with a 200-mesh sieve after completion to obtain hard magnetic powder particles with surfaces coated with an EVA resin layer;
adding 2 parts of EVA resin into 7 parts of acetone, fully dissolving to obtain an EVA resin solution, adding 9 parts of SAP water-absorbing resin powder into the acetone solution of the EVA resin, fully stirring, spraying and granulating, and sieving with a 800-mesh sieve after finishing to obtain SAP water-absorbing resin particles with surfaces coated with an EVA resin layer;
EVA resin, which is purchased from LG chemical, the model is EA28025, the expanded graphite is purchased from Henan Liujia graphite Co., ltd, the model is LG-3001, the density is 0.85-1.1g/cm3, the expansion temperature is 290-300 ℃, the expansion volume is more than or equal to 230ml/g, the SAP water-absorbing resin is purchased from LG chemical, the model is GS-1000I, and the density is 0.55-0.6g/cm3;
1.2, adding the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles prepared in the step 1.1 into a tray 6 according to a volume ratio of 2:4:3, and starting a vibration generator 7 to vibrate after fully mixing, so that the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles are sequentially stacked in layers to form a layered structure;
1.3, probing downwards through a pressing plate 8, compacting the laminated structure, then heating the compacted laminated structure by ultrasonic waves through an ultrasonic wave combination head 9 for 5-15S, melting EVA resin coated on the outer sides of the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles by ultrasonic waves with the frequency of 20KHz, bonding the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles through EVA resin, bonding the particles below the probe 91 into particle groups with a multilayer structure after cooling, and sieving the mixed particles in a tray 6 by a 50-mesh sieve after completing the process, and separating to obtain the particle groups;
1.4, adding the particle groups and 1mm steel balls into a dry ball mill according to a ratio of 1:1, ball-milling for 15-30min at 150r/min to peel off an EVA resin layer on the exposed part surface of the SAP water absorbent resin particles, sieving and separating the steel balls after completion, and obtaining the multilayer composite filler, wherein the weight part of the EVA resin of the multilayer composite filler is 3 parts.
2) Preparation of fireproof heat-insulating paint
2.1, taking the following raw materials in parts by weight:
15 parts of epoxy resin, 14 parts of butyl acetate, 32 parts of methylene dichloride and 17 parts of the multilayer composite filler prepared in the embodiment; 59 parts of water, 4 parts of polyvinyl alcohol, 7 parts of neodymium iron boron alloy powder, 18 parts of expanded vermiculite, 4 parts of aluminum hydroxide and 88 parts of 6mm steel balls; the epoxy resin is purchased from Nanya epoxy resin (Kunshan) limited company, the model is E-128, and the polyvinyl alcohol is purchased from Chongqing Sichuan-Wei chemical industry limited company of China petrochemical group, the model is PVA088-20 (G);
2.2, adding the multilayer composite filler, epoxy resin, butyl acetate and methylene dichloride into a reaction kettle, heating to 40 ℃ at 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at the rotating speed of 80r/min, and cooling to obtain a component A;
adding neodymium-iron-boron alloy powder, expanded vermiculite, aluminum hydroxide, 6mm steel balls and 45 parts of water into a ball mill, ball milling for 4-4.5 hours at 220r/min, adding the liquid into a reaction kettle after finishing, adding polyvinyl alcohol and 14 parts of water, heating to 65 ℃ at 2 ℃/min, preserving heat, stirring and mixing for 2-2.5 hours at a rotating speed of 60r/min, and cooling to obtain the component B.
Comparative example 1
The fireproof heat-insulating coating of the comparative example comprises the following raw materials in parts by weight:
17 parts of epoxy resin, 16 parts of butyl acetate and 29 parts of dichloromethane; 58 parts of water, 5 parts of polyvinyl alcohol, 22 parts of expanded graphite, 5 parts of aluminum hydroxide and 85 parts of 6mm steel balls; the epoxy resin is purchased from Nanya epoxy resin (Kunshan) limited company, the model is E-128, and the polyvinyl alcohol is purchased from Chongqing Sichuan-Wei chemical industry limited company of China petrochemical group, the model is PVA088-20 (G);
then adding epoxy resin, butyl acetate and methylene dichloride into a reaction kettle, heating to 40 ℃ at a speed of 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at a speed of 80r/min, and cooling to obtain a component A;
adding the expanded graphite, aluminum hydroxide, steel balls with the diameter of 6mm and 44 parts of water into a ball mill, ball milling for 4-4.5 hours at the speed of 220r/min, adding the liquid into a reaction kettle after finishing, adding the polyvinyl alcohol and 12 parts of water, heating to 65 ℃ at the speed of 2 ℃/min, preserving heat, stirring and mixing for 2-2.5 hours at the speed of 60r/min, and cooling to obtain the component B.
Comparative example 2
The fireproof heat-insulating coating of the comparative example comprises the following raw materials in parts by weight:
18 parts of epoxy resin, 17 parts of butyl acetate and 30 parts of dichloromethane; 60 parts of water, 6 parts of polyvinyl alcohol, 23 parts of expanded vermiculite, 6 parts of chlorinated paraffin and 90 parts of 6mm steel ball; the epoxy resin is purchased from Nanya epoxy resin (Kunshan) limited company, the model is E-128, and the polyvinyl alcohol is purchased from Chongqing Sichuan-Wei chemical industry limited company of China petrochemical group, the model is PVA088-20 (G);
then adding epoxy resin, butyl acetate and methylene dichloride into a reaction kettle, heating to 40 ℃ at a speed of 0.5 ℃/min, preserving heat, stirring and mixing for 2 hours at a speed of 80r/min, and cooling to obtain a component A;
adding the expanded vermiculite, chlorinated paraffin, 6mm steel balls and 45 parts of water into a ball mill, ball milling for 4-4.5 hours at 220r/min, adding the liquid into a reaction kettle after finishing, adding the polyvinyl alcohol and 13 parts of water, heating to 65 ℃ at 2 ℃/min, preserving heat, stirring and mixing for 2-2.5 hours at a rotating speed of 60r/min, and cooling to obtain the component B.
The two-component fireproof heat-insulating paint prepared from each example and comparative example was mixed in a ratio of A, B components of 1:1 to obtain fireproof heat-insulating paint, and then the paint prepared from each example and the paint prepared from comparative example were respectively diluted to 55-60S (GB 1723-1993 paint viscosity measurement method) by adding solvents, sprayed to roughness ra12.5 at different thicknesses, and after standing for 10min, tested:
1) Wet film adhesion test was performed by selecting example 1, example 2, comparative example 1 and comparative example 2, and the specific test results are shown in table 1:
2) The fire-proof and heat-insulating capacities of example 2, example 3, example 4, example 5, comparative example 1 and comparative example 2 were selected, and the tests were carried out according to the test method of the fire-proof property of GB/T14007-2018 section 6.5 of fireproof paint for steel structure, and the test results are shown in the following table:
the fireproof heat-insulating coating of the embodiment is characterized in that during spraying, the hard magnetic powder of the multilayer composite filler is magnetized, so that the magnetic field adsorption force effect is generated by the hard magnetic powder, the wet film adhesion force of the coating is increased, meanwhile, the water absorption resin of SAP is utilized to absorb the water in the coating, so that the viscosity of the coating is rapidly increased, the initial viscosity of the coating can be lower, and the spraying construction of the coating is facilitated; after spraying, a layered composite structure of the water-absorbent resin layer 4, the expanded graphite layer 2 and the hard magnetic powder layer 3 can be formed, so that the effects of gradual expansion and layered stripping can be achieved in a high-temperature environment, and the durability of the coating against high temperature is improved.
Before the coating is sprayed and used, the prepared A component and B component are uniformly mixed according to the proportion of 1:1 to obtain the fireproof heat-insulating coating, in the coating process, firstly, the steel structure base material 1 is coated with the antirust primer, after the steel structure base material is completely dried, the fireproof heat-insulating coating is sprayed on the surface of the antirust primer layer, an external magnetic field is applied to a wet coating film in a wet film state, and the fireproof heat-insulating coating is magnetized, so that the hard magnetic powder layer 3 in the coating is magnetized to have magnetism; due to the action of magnetic field adsorption force between the steel structure base material 1 and the hard magnetic powder layer 3, the hard magnetic powder layer 3 is deposited on the surface of the rust-proof primer to form a magnetic layer, so that the wet film adhesion of the coating is increased;
in the coating construction, the viscosity of the coating can be quickly increased due to the absorption of the SAP water-absorbent resin to the moisture in the coating, so that the initial viscosity of the coating can be lower, and the spraying construction is facilitated;
because the component B is an aqueous system, after the component A and the component B are mixed, SAP water-absorbent resin particles in the multilayer composite filler absorb water introduced by the component B and expand, so that the multilayer composite filler forms a shape with one large side and the other small side, when the multilayer composite filler is deposited downwards under the action of magnetic field adsorption force, due to fluid resistance, the orientation of hard magnetic powder particles towards the surface of the antirust primer is formed, and then a layered composite structure of a water-absorbent resin layer 4-an expanded graphite layer 2-a hard magnetic powder layer 3 is formed sequentially from inside to outside after the deposition is completed, and after the coating is dried, an external expanded flame-retardant layer 5 is formed on the surface of the layered composite structure by the expanded heat-insulating filler and the flame retardant in the component B, as shown in fig. 1;
when a fire disaster occurs, the fire disaster is sequentially expanded and peeled according to the paths from outside to inside, and heat is blocked; because a large amount of water is adsorbed in the water-absorbent resin layer 4, after the expansion flame-retardant layer 5 on the outer layer is consumed, the water in the water-absorbent resin layer 4 is heated and evaporated after heat is transferred to the water-absorbent resin layer 4, so that a large amount of heat can be absorbed, and the inward invasion speed of the heat is delayed; after the water-absorbent resin layer 4 is consumed, heat is transferred to the expanded graphite layer 2, when the temperature of the expanded graphite layer 2 is increased to the initial expansion temperature, the expanded graphite layer 2 is expanded to form a porous loose heat insulation layer to block external heat, when the expanded graphite layer 2 is consumed, heat is transferred to the hard magnetic powder layer 3, and when the temperature of the hard magnetic powder layer 3 is increased to be higher than the magnetic transition temperature, the hard magnetic powder layer 3 falls off due to magnetic disappearance, so that a part of heat can be taken away.
The fireproof heat-insulating coating prepared by the preparation process can magnetize the hard magnetic powder of the multilayer composite filler during spraying, so that the hard magnetic powder generates magnetic field adsorption force, the wet film adhesive force of the coating is increased, and meanwhile, the water absorption resin of SAP (super absorbent polymer) is utilized to absorb the moisture in the coating, so that the viscosity of the coating is rapidly increased, the initial viscosity of the coating can be lower, and the spraying construction of the coating is facilitated; after spraying, a layered composite structure of the water-absorbent resin layer 4, the expanded graphite layer 2 and the hard magnetic powder layer 3 can be formed, so that the effects of gradual expansion and layered stripping can be achieved in a high-temperature environment, and the durability of the coating against high temperature is improved.
The foregoing description is only one preferred embodiment of the invention, and therefore all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the invention are intended to be embraced therein.
Claims (9)
1. The fireproof heat-insulating coating is characterized by comprising a component A and a component B; the component A comprises the following raw materials in parts by weight: 12-18 parts of multilayer composite filler, 12-15 parts of epoxy resin, 10-15 parts of butyl acetate and 20-35 parts of dichloromethane;
the component B comprises the following raw materials in parts by weight: 55-60 parts of water, 3-5 parts of polyvinyl alcohol, 4-8 parts of hard magnetic powder, 15-22 parts of expansion heat insulation filler and 3-5 parts of flame retardant;
the multi-layer composite filler consists of the following raw materials in parts by weight: 5-10 parts of hard magnetic powder, 5-7 parts of expanded graphite powder, 6-9 parts of SAP (super absorbent polymer) and 1-3 parts of EVA (ethylene vinyl acetate) resin; the SAP water-absorbing resin and the hard magnetic powder are adhered to the two sides of the expanded graphite powder, and the magnetic transition temperature of the hard magnetic powder is lower than the initial expansion temperature of the expanded graphite powder.
2. The fire retardant and heat insulating coating of claim 1, wherein the hard magnetic powder comprises at least one of alnico powder, neodymium iron boron powder, and manganese zinc ferrite powder.
3. The fire retardant and heat insulating coating of claim 1 wherein the expanded heat insulating filler comprises at least one of expanded graphite, perlite, and expanded vermiculite.
4. The fire-proof heat-insulating coating according to claim 1, wherein the flame retardant comprises at least one of aluminum hydroxide, antimony trioxide and chlorinated paraffin.
5. A process for preparing the fireproof heat-insulating coating according to claim 1, which comprises the following steps:
s1, adding 12-18 parts of multilayer composite filler, 12-15 parts of epoxy resin, 10-15 parts of butyl acetate and 20-35 parts of dichloromethane into a reaction kettle according to parts by weight, heating, stirring and cooling to obtain a component A;
s2, adding 42-45 parts of water, 4-8 parts of hard magnetic powder, 15-22 parts of expansion heat insulation filler, 3-5 parts of flame retardant and 85-90 parts of 6mm steel ball into a ball mill, adding liquid into a reaction kettle after ball milling, and adding 13-15 parts of water and 3-5 parts of polyvinyl alcohol according to parts by weight; heating, stirring and cooling to obtain a component B;
the multi-layer composite filler is prepared by the following steps:
s21, respectively wrapping EVA resin layers on the surfaces of the SAP water-absorbent resin powder, the expanded graphite powder and the hard magnetic powder to obtain SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles;
s22, adding the hard magnetic powder particles, the expanded graphite particles and the SAP water-absorbent resin particles into a tray according to a volume ratio of 2:4:3, mixing, and vibrating to enable the SAP water-absorbent resin particles, the expanded graphite particles and the hard magnetic powder particles to be sequentially stacked in layers to form a layered structure;
s23, compacting the layered structure in the step S22, and then carrying out ultrasonic heating to melt the SAP water-absorbent resin particles, the expanded graphite particles and the EVA resin coated on the outer sides of the hard magnetic powder particles to obtain particle groups;
s24, adding the particle clusters into a dry ball mill, and sieving and separating after ball milling to obtain the multilayer composite filler.
6. The preparation process according to claim 5, wherein in step 21, the expanded graphite powder is added into an acetone solution of the EVA resin, sufficiently stirred, then subjected to powder spraying and granulation, and finally sieved by a 500-mesh sieve, so as to obtain expanded graphite particles with surfaces coated with the EVA resin layer;
adding the hard magnetic powder into an acetone solution of EVA resin, fully stirring, spraying powder for granulation, and sieving with a 200-mesh sieve to obtain hard magnetic powder particles with surfaces coated with an EVA resin layer;
adding the SAP water-absorbing resin powder into an acetone solution of EVA resin, fully stirring, spraying and granulating, and sieving with a 800-mesh sieve to obtain SAP water-absorbing resin particles with surfaces coated with EVA resin layers.
7. The preparation process according to claim 5, wherein in step S1, the component a is obtained after heating to 40 ℃ at 0.5 ℃/min, maintaining the temperature, stirring and mixing for 2 hours at 80r/min, and cooling.
8. The preparation process according to claim 5, wherein in step S2, the mixture is stirred and mixed at a speed of 60r/min for 2-2.5 hours at a temperature of 2 ℃/min to 65 ℃ and then cooled to obtain the component B.
9. The preparation process according to claim 5, wherein in step S24, the pellet and the 1mm steel balls are added into a dry ball mill in a ratio of 1:1, ball milling is performed for 15-30min at 150r/min to peel off the EVA resin layer on the exposed surface of the SAP water absorbent resin particles, and after completion, the steel balls are separated by sieving, thereby obtaining the multilayer composite filler.
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| US20220275190A1 (en) * | 2019-08-26 | 2022-09-01 | Sekisui Chemical Co., Ltd. | Heat-expanding fire retardant |
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