CN115595021A - Hot-dip molding powder fireproof coating and preparation method and application thereof - Google Patents
Hot-dip molding powder fireproof coating and preparation method and application thereof Download PDFInfo
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- CN115595021A CN115595021A CN202211397841.1A CN202211397841A CN115595021A CN 115595021 A CN115595021 A CN 115595021A CN 202211397841 A CN202211397841 A CN 202211397841A CN 115595021 A CN115595021 A CN 115595021A
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- fireproof coating
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- powder
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- 238000000576 coating method Methods 0.000 title claims abstract description 153
- 239000011248 coating agent Substances 0.000 title claims abstract description 135
- 239000000843 powder Substances 0.000 title claims abstract description 121
- 238000000465 moulding Methods 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000003063 flame retardant Substances 0.000 claims abstract description 29
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 17
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 16
- 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 13
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 11
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 11
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 229920003023 plastic Polymers 0.000 claims description 58
- 239000004033 plastic Substances 0.000 claims description 58
- 238000002156 mixing Methods 0.000 claims description 39
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 23
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 17
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 17
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000006223 plastic coating Substances 0.000 claims description 14
- 238000007872 degassing Methods 0.000 claims description 11
- 229920000877 Melamine resin Polymers 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 7
- 229920013716 polyethylene resin Polymers 0.000 claims description 7
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 4
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 4
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 4
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 4
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 4
- 239000004626 polylactic acid Substances 0.000 claims description 4
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims description 4
- WRXCBRHBHGNNQA-UHFFFAOYSA-N (2,4-dichlorobenzoyl) 2,4-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1Cl WRXCBRHBHGNNQA-UHFFFAOYSA-N 0.000 claims description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 claims description 3
- DCQBZYNUSLHVJC-UHFFFAOYSA-N 3-triethoxysilylpropane-1-thiol Chemical compound CCO[Si](OCC)(OCC)CCCS DCQBZYNUSLHVJC-UHFFFAOYSA-N 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 3
- 239000011609 ammonium molybdate Substances 0.000 claims description 3
- 229940010552 ammonium molybdate Drugs 0.000 claims description 3
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 3
- 229960000892 attapulgite Drugs 0.000 claims description 3
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 3
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052625 palygorskite Inorganic materials 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 3
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 229920001233 Poly-4-hydroxybenzoate Polymers 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000004079 fireproofing Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims 1
- 239000006260 foam Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007598 dipping method Methods 0.000 description 32
- 238000009835 boiling Methods 0.000 description 13
- 238000007599 discharging Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 11
- 238000007664 blowing Methods 0.000 description 7
- 238000007667 floating Methods 0.000 description 7
- 238000000227 grinding Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 6
- 239000003973 paint Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 3
- 238000005282 brightening Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 244000028419 Styrax benzoin Species 0.000 description 2
- 235000000126 Styrax benzoin Nutrition 0.000 description 2
- 235000008411 Sumatra benzointree Nutrition 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 229960002130 benzoin Drugs 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 235000019382 gum benzoic Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 2
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 229940090248 4-hydroxybenzoic acid Drugs 0.000 description 1
- 101150016130 CP77 gene Proteins 0.000 description 1
- 101100372716 Escherichia phage 186 fil gene Proteins 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
-
- 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
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/06—Polyethene
-
- 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
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09D123/0853—Vinylacetate
-
- 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
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/10—Homopolymers or copolymers of propene
- C09D123/12—Polypropene
-
- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- 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
- C09D5/185—Intumescent paints
-
- 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
- C08K2003/2255—Oxides; Hydroxides of metals of molybdenum
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
Abstract
The invention provides a hot-dip molding powder fireproof coating and a preparation method and application thereof, wherein the coating is prepared from the following raw materials of thermoplastic matrix resin, an expansion flame-retardant system, a carbon layer reinforcing agent and a cross-linking agent; the components are as follows by weight: 100 parts of thermoplastic matrix resin, 70-350 parts of intumescent flame retardant system, 4.0-25 parts of carbon layer reinforcing agent and 0.05-2.0 parts of cross-linking agent. The powder fireproof coating provided by the invention is easy to expand and foam, can generate a better foam carbon layer, can be uniformly coated on the surface of a workpiece, and has a better fireproof effect.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a hot-dip molding powder fireproof coating and a preparation method and application thereof.
Background
Fire-retardant coatings are applied to surfaces of flammable or architectural substrates to modify the fire characteristics of the material surface to retard the spread of fire or to increase the fire endurance of the architectural substrate.
In recent years, the intumescent fire-retardant coating can effectively protect steel structure building base materials and is widely applied, and most of the intumescent fire-retardant coating is solvent-based fire-retardant coating, so that a large amount of Volatile Organic Compounds (VOC) can be generated in the manufacturing and production processes, and the intumescent fire-retardant coating is not environment-friendly and has certain harmfulness; meanwhile, the solvent-based fireproof coating has the defects of low coating efficiency, uneven coating thickness and the like. The powder type fireproof coating can overcome the defects of the solvent type fireproof coating, does not generate a large amount of Volatile Organic Compounds (VOC) in the manufacturing and production processes, and has the advantages of high coating efficiency, uniform coating, high utilization rate and the like, which are gradually paid attention to by people. However, the powder type fireproof coating has the problems of difficult foaming, poor quality of a foam carbon layer, low fire resistance limit and the like after being powdered.
Disclosure of Invention
The powder fireproof coating is easy to expand and foam, generates a better foam carbon layer, and can reach a better fire resistance limit.
First, an object of the present invention is to provide a hot-dip molding powder fireproof coating.
The coating is prepared from raw materials comprising the following components,
thermoplastic matrix resin, an expansion flame-retardant system, a carbon layer reinforcing agent and a cross-linking agent;
the paint comprises the following components in parts by weight:
preferably, the components are as follows by weight:
further, the thermoplastic matrix resin is one or a combination of polyethylene resin, polypropylene resin, ethylene-vinyl acetate, poly-p-hydroxybenzoate resin, polylactic acid, thermoplastic polyurethane and thermoplastic polyester, and preferably, the thermoplastic matrix resin has a melt index of 0.5-6.0g/10min. The matrix resin adopted by the invention is matched with the intumescent flame retardant system, so that the fireproof coating has proper viscosity, and a high-quality foam carbon layer is generated.
Further, the expansion flame-retardant system is expanded graphite and/or an ammonium polyphosphate-pentaerythritol-melamine system (APP-MEL-PER), wherein the weight ratio of the three substances in the ammonium polyphosphate-pentaerythritol-melamine system is as follows: 15-40; wherein the ammonium polyphosphate is high molecular weight type ammonium polyphosphate, the polymerization degree n is more than or equal to 1000, and the crystal form is type II.
Further, the ammonium polyphosphate is surface-modified by a silane coupling agent, wherein the silane coupling agent is one or a combination of gamma-aminopropyltriethoxysilane (KH-550), gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560), gamma-propylacryloxypropyltrimethoxysilane (KH-573) and gamma-mercaptopropyltriethoxysilane (KH-580). The invention adopts the silane coupling agent to modify the surface of the ammonium polyphosphate so that the intumescent flame retardant system can have better compatibility and thermal stability with matrix resin.
Further, the carbon layer reinforcing agent can adopt conventional reinforcing agents in the field, and can be preferably one or a combination of titanium dioxide, fibers and nano attapulgite in the invention, and preferably, the crystal form of the titanium dioxide is rutile type; the fibers preferably employ: chopped fibers, asbestos fibers, whiskers.
Further, the cross-linking agent is one or the combination of dicumyl peroxide, benzoyl peroxide, tert-butyl peroxybenzoate, di-tert-butyl peroxide, 2, 4-dichlorobenzoyl peroxide and 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane. According to the invention, the cross-linking agent is added into the powder fireproof coating, the powder coating is cross-linked by the cross-linking agent in an in-situ cross-linking manner, and the formation of a cross-linking network enables the powder coating to complete conversion from thermoplasticity to thermosetting, so that the strength of the coating melt is regulated and controlled, the quality of the foam carbon layer is improved, and the fire resistance limit is raised.
The hot-dip molding powder fireproof coating further comprises: smoke suppressant, leveling agent and degassing agent.
Further, the smoke suppressant may be one conventional in the art, and in the present invention, one or a combination of zinc oxide, molybdenum oxide, zinc aluminate, zinc borate, ammonium molybdate, ferrocene and aluminum hydroxide may be preferred. The amount thereof is a conventional amount, and in the present invention, it is preferably 4.0 to 70 parts by weight, more preferably 6.7 to 60 parts by weight.
Further, as the leveling agent, a leveling agent conventional in the art may be used, such as: one or a combination of 503, 504 and 505 leveling agents. Specific brands include GLP503, GLP504, GLP505, modaFlow Powder III, modaFlow Powder 2000, modaFlow Powder 6000, worleeAdd 101P, resiflow PV88, resiflow P67, resiflow CP77, resiflow VP-E137500 and the like. The amount thereof is a conventional amount, and in the present invention, it is preferably 0.05 to 8.0 parts by weight, more preferably 0.05 to 6.4 parts by weight.
Further, as the degassing agent, a degassing agent conventional in the art may be used, and one of benzoin, an SA500 degassing agent, a T961 degassing agent, and a 4410 degassing agent may be preferably used in the present invention. The dosage is conventional dosage, and the dosage is preferably 0 to 9.0 weight parts in the invention; more preferably 0 to 6.4 parts by weight.
It is worth mentioning that the hot dip molding powder fireproof coating composition of the present invention may further comprise some conventional additives, such as: brightening agent, defoaming agent, delustering agent, texturing agent and the like, and the technical personnel can select and add the brightening agent, the defoaming agent, the delustering agent, the texturing agent and the like according to actual conditions, and the dosage of the brightening agent, the defoaming agent, the delustering agent, the texturing agent and the like is the conventional dosage.
Secondly, the invention aims to provide a preparation method of the hot-dip molding powder fireproof coating.
The method comprises the following steps:
blending, slicing and crushing the components except the cross-linking agent according to the weight parts; and then adding a cross-linking agent and mixing to prepare the hot-dip molding powder fireproof coating.
The invention can adopt the following technical scheme:
s1.1, putting hot-dip plastic matrix resin into a gap between two rollers of a two-roller open mill, uniformly mixing, and then discharging the mixture into a sheet, wherein the temperature of the two-roller open mill is set to be 100-120 ℃, the rotating speed is set to be 14.0-18.0r/min, and the mixing time is 10.0-15.0min;
s1.2, sequentially feeding a smoke suppressant, a degassing agent, a flatting agent and a carbon layer reinforcing agent expansion flame-retardant system into a gap between two rollers of a two-roller open mill, uniformly mixing, and then discharging, wherein the mixing time is 10.0-15.0min;
s1.3, putting the obtained sheet into a grinder to be ground to obtain powder fireproof coating, wherein the single grinding time is 10-15S;
s1.4, putting the cross-linking agent and the powder fireproof coating into a grinder to be mixed to obtain the hot-dip molding powder fireproof coating, wherein the mixing time is about 10-15S.
Preferably, in step S1.2, the addition of the smoke suppressant, degassing agent and levelling agent takes precedence over the intumescent flame retardant system and char layer enhancer.
Thirdly, the invention also aims to provide application of the hot-dip plastic powder fireproof coating, and the coating is coated on the surface of a workpiece by adopting a hot-dip plastic coating method.
The method specifically comprises the following steps:
s2.1, setting the temperature of a baking furnace to 150-190 ℃, putting a workpiece to be coated, and preheating for 10.0-20.0min;
s2.2, pouring the hot-dip molding powder fireproof coating into a plastic dipping barrel until the hot-dip molding powder fireproof coating submerges 2/3 of the height of the barrel wall, and adjusting the air pressure to be kept at 0.05-0.25Mpa to boil the powder in the plastic dipping barrel;
s2.3, taking out the preheated workpiece, quickly immersing the workpiece into a boiling plastic dipping barrel until powder completely submerges the workpiece, taking out the workpiece after plastic dipping for 5-20S, and blowing off floating powder;
s2.4, placing the workpiece after plastic dipping into a baking oven for baking, wherein the temperature of the baking oven is set to be 150-190 ℃, and baking is carried out for 10.0-20.0min.
Preferably, in step S2.1, the temperature of the baking oven is set to 160-180 ℃ and preheated for 10.0-15.0min.
Preferably, in step S2.2, the pressure of the injection molding barrel is adjusted to be maintained at 0.10-0.20MPa.
Preferably, in step S2.3, the preheated workpiece is immersed in a boiling plastic-impregnated barrel for plastic impregnation for 10 to 15 seconds and then taken out.
Preferably, in step S2.4, the temperature of the baking oven is set to 160-180 ℃, baking for 10.0-15.0min.
Compared with the prior art, the invention has the following beneficial effects:
1. the hot-dip molding powder fireproof coating provided by the invention is reasonable in formula, does not need to add any solvent, does not release Volatile Organic Compounds (VOC) in the preparation, coating and using processes, and has the characteristics of environmental protection.
2. The hot-dip molding powder fireproof coating provided by the invention has the advantages that the matrix resin has proper viscosity and melt strength by adjusting the type and the proportion of the thermoplastic matrix resin and matching with the cross-linking agent, so that the foaming process is regulated and controlled, the powder type fireproof coating is easy to expand and foam, a better foam carbon layer is generated, and a better fire-resistant limit is reached.
3. The hot-dip molding powder fireproof coating provided by the invention has the advantages that the viscosity of the expansion flame-retardant system is adjusted to be matched with that of the matrix resin, so that the coating has proper viscosity, and the powder fireproof coating can generate a high-quality foam carbon layer.
4. The hot-dip molding powder fireproof coating provided by the invention adopts the halogen-free intumescent flame retardant, so that the pollution and harm of halogen components to the environment are avoided.
5. The hot-dip molding powder fireproof coating provided by the invention is coated by adopting a hot-dip molding process, multiple times of coating is not required after one-time coating, the coating efficiency is greatly improved, the construction cost is reduced, and meanwhile, the construction is not influenced by climatic conditions.
6. The hot-dip plastic powder fireproof coating provided by the invention is coated by adopting a hot-dip plastic process, the utilization rate of the powder fireproof coating is high, and the defects of uneven thickness and low coating efficiency of the traditional fireproof coating are overcome.
7. The hot-dip plastic powder fireproof coating provided by the invention is coated by adopting a hot-dip plastic process, is simple in method, convenient to operate, high in coating efficiency and flexible in application, and can be coated according to the actual application requirements of workpieces.
8. The hot-dip molding powder fireproof coating provided by the invention is coated by adopting a hot-dip molding process, only the cross-linking agent powder and the powder coating are directly blended and coated, and the cross-linking agent and the polymer are not required to be melted and blended in advance, so that the hot-dip molding powder fireproof coating is convenient and quick, and has a good coating effect.
Drawings
FIG. 1 shows a carbon residue morphology of the powder fireproof coating of example 1 of the present invention;
FIG. 2 shows a morphology diagram of carbon residue of the powder fireproof coating of example 2 of the present invention;
FIG. 3 shows a carbon residue morphology of the powder fireproof coating of example 3 of the invention;
FIG. 4 shows a morphology diagram of carbon residue of the powder fireproof coating of example 4 of the present invention;
FIG. 5 shows a morphology of carbon residue of the powder fireproof coating of example 5 of the present invention;
FIG. 6 shows a morphology of carbon residue of the powder fireproof coating of example 6 of the present invention.
Detailed Description
While the present invention will be described in detail and with reference to the specific embodiments thereof, it should be understood that the following detailed description is merely illustrative of the present invention and should not be taken as limiting the scope of the present invention, but is intended to cover modifications and variations thereof that would occur to those skilled in the art upon reading the present disclosure.
The starting materials used in the examples are all commercially available products.
Example 1
The preparation method of the hot-dip molding powder fireproof coating provided by the embodiment is as follows:
s1.1, putting 40.0g of polyethylene resin, 20.0g of ethylene-vinyl acetate resin and 40.0g of polypropylene resin into a gap between two rollers of a two-roller open mill, uniformly mixing, and then discharging sheets, wherein the temperature of the two-roller open mill is set at 105 ℃, the rotating speed is set at 15r/min, and the mixing time is 10min;
s1.2, sequentially feeding 4.0g of zinc borate, 0.05g of benzoin, 0.5g of 503 leveling agent, 4.0g of asbestos fiber, 40.0g of ammonium polyphosphate, 22.0g of pentaerythritol and 8.0g of melamine into a gap between two rollers of a double-roller open mill, and discharging after uniform mixing, wherein the mixing time is 10.0min, the ammonium polyphosphate is high-molecular-weight ammonium polyphosphate, the polymerization degree n is more than or equal to 1000, and the crystal form is II;
s1.3, putting the obtained sheet into a grinder to be ground to obtain powder fireproof coating, wherein the single grinding time is 10S;
s1.4, putting 1.0g of dicumyl peroxide (DCP) and the powder fireproof paint into a grinder to be mixed to obtain the hot-dip molding powder fireproof paint, wherein the mixing time is 10S.
The following is used to describe the application of the hot-dip plastic powder fireproof coating prepared by the method, which is suitable for being coated on the surface of a workpiece by adopting a hot-dip plastic coating method, and specifically comprises the following steps:
s2.1, setting the temperature of the baking furnace to 190 ℃, putting a workpiece to be coated, and preheating for 10min;
s2.2, pouring the hot-dip molding powder fireproof coating prepared in the embodiment into a plastic dipping barrel until the hot-dip molding powder fireproof coating submerges 2/3 of the height of the barrel wall, adjusting a switch of a compressor to adjust the air pressure to be kept at 0.20Mpa, and boiling the powder in the plastic dipping barrel;
s2.3, taking out the workpiece preheated in the step S2.1, quickly immersing the workpiece into a boiling plastic dipping barrel until powder completely submerges the workpiece, taking out the workpiece after plastic dipping for 10S, and blowing off floating powder;
s2.4, placing the workpiece after plastic dipping into a baking furnace to bake to finish the melting leveling process, setting the temperature of the baking furnace to 150 ℃, baking for 20min, taking out the coated workpiece after baking is finished, and finishing the hot-dip plastic coating process.
The measurement shows that the coating thickness can be controlled within the range of 1-1.5mm, the coating is uniform, and the test shows that the fire resistance limit is 33min.
Example 2
The preparation method of the hot-dip molding powder fireproof coating provided by the embodiment is as follows:
s1.1, putting 45.0g of polyethylene resin, 31.5g of ethylene-vinyl acetate resin and 22.5g of poly-p-hydroxybenzoic acid resin into a gap between two rollers of a double-roller open mill, uniformly mixing, and then discharging, wherein the temperature of the double-roller open mill is set at 100 ℃, the rotating speed is set at 14r/min, and the mixing time is 15min;
s1.2, sequentially feeding 20.0g of molybdenum oxide, 1.5g of SA500 degasifier, 2.5g of 503 flatting agent, 8.0g of whisker, 10.0g of titanium dioxide, 75.0g of ammonium polyphosphate, 40.0g of pentaerythritol and 20.0g of melamine into a gap between two rollers of a double-roller open mill, and discharging sheets after uniform mixing, wherein the mixing time is 15.0min;
s1.3, putting the obtained sheet into a grinder to be ground to obtain powder fireproof coating, wherein the single grinding time is 15S;
s1.4, putting 1.25g of Benzoyl Peroxide (BPO) and the powder fireproof coating into a grinder to be mixed to obtain the hot-dip plastic powder fireproof coating, wherein the mixing time is 15S.
It is worth mentioning that ammonium polyphosphate is modified by a silane coupling agent gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH-560), specifically, the modification method is carried out according to the method disclosed in patent CN 108570246A.
The following is used to describe the application of the hot-dip plastic powder fireproof coating prepared by the method, which is suitable for being coated on the surface of a workpiece by adopting a hot-dip plastic coating method, and specifically comprises the following steps:
s2.1, setting the temperature of a baking furnace to 150 ℃, putting the workpiece to be coated, and preheating for 20min;
s2.2, pouring the hot-dip molding powder fireproof coating prepared in the embodiment into a plastic dipping barrel until the hot-dip molding powder fireproof coating submerges 2/3 of the height of the barrel wall, adjusting a switch of a compressor to adjust the air pressure to be kept at 0.25Mpa, and boiling the powder in the plastic dipping barrel;
s2.3, taking out the workpiece preheated in the step S2.1, quickly immersing the workpiece into a boiling plastic dipping barrel until powder completely submerges the workpiece, taking out the workpiece after plastic dipping for 5S, and blowing off floating powder;
s2.4, placing the workpiece after plastic dipping into a baking furnace to bake to finish the melting leveling process, setting the temperature of the baking furnace to 180 ℃, baking for 15min, taking out the coated workpiece after baking is finished, and finishing the hot-dip plastic coating process.
The measurement shows that the coating thickness can be controlled within the range of 1-1.5mm, the coating is uniform, and the test shows that the fire resistance limit is 34min.
Example 3
The preparation method of the hot-dip molding powder fireproof coating provided by the embodiment is as follows:
s1.1, putting 40.0g of polyethylene resin, 20.0g of polyparahydroxybenzoic acid resin and 40.0g of polylactic acid into a gap between two rollers of a two-roller open mill, uniformly mixing, and then discharging the mixture into a sheet, wherein the temperature of the two-roller open mill is set at 120 ℃, the rotating speed is set at 18r/min, and the mixing time is 10min;
s1.2, feeding 30.0g of zinc aluminate, 3.0g of T961 degasifier, 3.5g of 505 leveling agent, 15.0g of titanium dioxide, 120.0g of ammonium polyphosphate, 72.0g of pentaerythritol and 54.0g of melamine into a gap between two rollers of a double-roller open mill in sequence, mixing uniformly, and then discharging, wherein the mixing time is 12.0min;
s1.3, putting the obtained sheet into a grinder to be ground to obtain powder fireproof coating, wherein the single grinding time is 10S;
s1.4, 0.05g of tert-butyl peroxybenzoate (TBPB) and the powder fireproof coating are put into a grinder to be mixed, and hot-dip molding powder fireproof coating is obtained, wherein the mixing time is 10S.
In this example, ammonium polyphosphate was modified with gamma-propylacryloxypropyltrimethoxysilane (KH-573) in the same manner as in example 2.
The following is used to describe the application of the hot-dip plastic powder fireproof coating prepared by the method, which is suitable for being coated on the surface of a workpiece by adopting a hot-dip plastic coating method, and specifically comprises the following steps:
s2.1, setting the temperature of a baking furnace to 180 ℃, putting the workpiece to be coated, and preheating for 13min;
s2.2, pouring the hot-dip molding powder fireproof coating prepared in the embodiment into a plastic dipping barrel until the hot-dip molding powder fireproof coating submerges 2/3 of the height of the barrel wall, adjusting a switch of a compressor to adjust the air pressure to be kept at 0.10Mpa, and boiling the powder in the plastic dipping barrel;
s2.3, taking out the workpiece preheated in the step S2.1, quickly immersing the workpiece into a boiling plastic dipping barrel until powder completely submerges the workpiece, taking out the workpiece after plastic dipping for 10S, and blowing off floating powder;
s2.4, placing the soaked and plastic-coated workpiece into a baking furnace to bake to complete the melting and leveling process, setting the temperature of the baking furnace to 170 ℃, baking for 10min, taking out the coated workpiece after baking is completed, and completing the hot-dip plastic coating process.
The measurement shows that the coating thickness can be controlled within the range of 1-1.5mm, the coating is uniform, and the test shows that the fire endurance is 36min.
Example 4
The preparation method of the hot-dip molding powder fireproof coating provided by the embodiment is as follows:
s1.1, putting 40.0g of ethylene-vinyl acetate resin, 20.0g of polyparahydroxybenzoic acid resin and 40.0g of thermoplastic polyurethane into a gap between two rollers of a two-roller open mill, uniformly mixing, and then discharging the mixture, wherein the temperature of the two-roller open mill is set at 110 ℃, the rotating speed is set at 15r/min, and the mixing time is 10min;
s1.2, feeding 40.0g of ammonium molybdate, 4.5g of 4410 degasifier, 5.5g of 505 leveling agent, 18.0g of titanium dioxide, 130.0g of ammonium polyphosphate, 90.0g of pentaerythritol and 80.0g of melamine into a gap between two rollers of a two-roller open mill in sequence, and discharging after uniform mixing, wherein the mixing time is 10.0min;
s1.3, putting the obtained sheet into a grinder to be ground to obtain powder fireproof coating, wherein the single grinding time is 10S;
s1.4, putting 0.5g of di-tert-butyl peroxide (DTBP) and the powder fireproof coating into a grinder to be mixed to obtain the hot-dip molding powder fireproof coating, wherein the mixing time is 10S.
In this example, ammonium polyphosphate was modified with gamma-mercaptopropyltriethoxysilane (KH-580) in the same manner as in example 2.
The following is used to describe the application of the hot-dip plastic powder fireproof coating prepared by the method, which is suitable for being coated on the surface of a workpiece by adopting a hot-dip plastic coating method, and specifically comprises the following steps:
s2.1, setting the temperature of the baking oven to 160 ℃, putting a workpiece to be coated, and preheating for 15min;
s2.2, pouring the hot-dip molding powder fireproof coating prepared in the embodiment into a plastic dipping barrel until the fireproof coating submerges 2/3 of the height of the barrel wall, and adjusting the pressure of a compressor switch to be 0.15Mpa so as to boil the powder in the plastic dipping barrel;
s2.3, taking out the workpiece preheated in the step S2.1, quickly immersing the workpiece into a boiling plastic dipping barrel until powder completely submerges the workpiece, taking out the workpiece after plastic dipping for 15S, and blowing off floating powder;
s2.4, placing the soaked and plastic-coated workpiece into a baking furnace to bake to complete the melting and leveling process, setting the temperature of the baking furnace to 150 ℃, baking for 20min, taking out the coated workpiece after baking is completed, and completing the hot-dip plastic coating process.
The measurement shows that the coating thickness can be controlled within the range of 1-1.5mm, the coating is uniform, and the test shows that the fire endurance is 40min.
Example 5
The preparation method of the hot-dip molding powder fireproof coating provided by the embodiment is as follows:
s1.1, putting 40.0g of polyethylene resin, 20.0g of ethylene-vinyl acetate resin, 40.0g of polyparahydroxybenzoic acid resin and 10.0g of thermoplastic polyester into a gap between two rollers of a two-roller open mill, uniformly mixing, and then discharging, wherein the temperature of the two-roller open mill is set at 100 ℃, the rotating speed is set at 15r/min, and the mixing time is 13min;
s1.2, feeding 70.0g of zinc oxide, 9.0g of T961 degassing agent, 8.0g of 504 leveling agent, 2.0g of nano attapulgite, 17.0g of titanium dioxide, 160.0g of ammonium polyphosphate, 90.0g of pentaerythritol and 70.0g of melamine into a gap between two rollers of a double-roller open mill in sequence, and mixing uniformly and then discharging, wherein the mixing time is 15.0min;
s1.3, putting the obtained sheet into a grinder to be ground to obtain powder fireproof coating, wherein the single grinding time is 15S;
s1.4, 2.0g of 2, 4-dichlorobenzoyl peroxide (DCBP) and the powder fireproof coating are placed into a grinder to be mixed to obtain the hot-dip molding powder fireproof coating, wherein the mixing time is 15S.
In this example, ammonium polyphosphate was modified with gamma-aminopropyltriethoxysilane (KH-550) in the same manner as in example 2.
The following is used to describe the application of the hot-dip plastic powder fireproof coating prepared by the method, which is suitable for being coated on the surface of a workpiece by adopting a hot-dip plastic coating method, and specifically comprises the following steps:
s2.1, setting the temperature of the baking furnace to 180 ℃, putting the workpiece to be coated, and preheating for 10min;
s2.2, pouring the hot-dip molding powder fireproof coating prepared in the embodiment into a plastic dipping barrel until the hot-dip molding powder fireproof coating submerges 2/3 of the height of the barrel wall, adjusting a switch of a compressor to adjust the air pressure to be kept at 0.05Mpa, and boiling the powder in the plastic dipping barrel;
s2.3, taking out the workpiece preheated in the step S2.1, quickly immersing the workpiece into a boiling plastic dipping barrel until powder completely submerges the workpiece, taking out the workpiece after plastic dipping for 20S, and blowing off floating powder;
s2.4, placing the workpiece after plastic dipping into a baking furnace to bake to finish the melting leveling process, setting the temperature of the baking furnace to 180 ℃, baking for 10min, taking out the coated workpiece after baking is finished, and finishing the hot-dip plastic coating process.
The measurement shows that the coating thickness can be controlled within the range of 1-1.5mm, the coating is uniform, and the test shows that the fire endurance is 41min.
Example 6:
the preparation method of the hot-dip molding powder fireproof coating provided by the embodiment is as follows:
s1.1, putting 35.0g of polyethylene resin, 25.0g of polyparahydroxybenzoic acid resin and 40.0g of polylactic acid into a gap between two rollers of a two-roller open mill, uniformly mixing, and then discharging the mixture into a sheet, wherein the temperature of the two-roller open mill is set at 105 ℃, the rotating speed is set at 18r/min, and the mixing time is 12min;
s1.2, sequentially feeding 20.0g of ferrocene, 35g of aluminum hydroxide, 6.5g of a leveling agent 504, 6.4g of a 4410 degassing agent, 25.0g of chopped fibers, 17.0g of expanded graphite, 100.0g of ammonium polyphosphate, 90.0g of pentaerythritol and 75.0g of melamine into a gap between two rollers of a two-roller open mill, uniformly mixing, and then feeding into a sheet, wherein the mixing time is 12.0min;
s1.3, putting the obtained sheet into a grinder to be ground to obtain powder fireproof coating, wherein the single grinding time is 10S;
s1.4, putting 1.5g of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane and the powder fireproof coating into a grinder to be mixed to obtain the hot-dip molding powder fireproof coating, wherein the mixing time is 12S.
The following is used to introduce the application of the hot-dip plastic powder fireproof coating prepared by the method, which is suitable for being coated on the surface of a workpiece by adopting a hot-dip plastic coating method, and specifically comprises the following steps:
s2.1, setting the temperature of a baking furnace to 180 ℃, putting the workpiece to be coated, and preheating for 15min;
s2.2, pouring the hot-dip molding powder fireproof coating prepared in the embodiment into a plastic dipping barrel until the hot-dip molding powder fireproof coating submerges 2/3 of the height of the barrel wall, adjusting a switch of a compressor to adjust the air pressure to be kept at 0.15Mpa, and boiling the powder in the plastic dipping barrel;
s2.3, taking out the workpiece preheated in the step S2.1, quickly immersing the workpiece into a boiling plastic dipping barrel until powder completely submerges the workpiece, taking out the workpiece after plastic dipping for 10S, and blowing off floating powder;
s2.4, placing the soaked and plastic-coated workpiece into a baking furnace to bake to complete the melting and leveling process, setting the temperature of the baking furnace to 190 ℃, baking for 10min, taking out the coated workpiece after baking is completed, and completing the hot-dip plastic coating process.
The measurement shows that the coating thickness can be controlled within the range of 1-1.5mm, the coating is uniform, and the test shows that the fire resistance limit is 43min.
The test was carried out using an ultra-thin steel-structure fire-retardant paint testing apparatus manufactured by Zhonghang Baimu Co Ltd for testing the fire-retardant limit of the powder fire-retardant paint-coated workpieces of examples 1 to 6, the test fire field type was a cellulose fire field, the apparatus was operated in the GB/T9978 standard using a Q235 type steel plate with a size of 42 × 821.7mm 3 . Table 1 shows the fire endurance data for the powder coatings of inventive examples 1-6.
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Limit of fire resistance/min | 33 | 34 | 36 | 40 | 41 | 43 |
As is clear from the fire endurance data shown in Table 1, the fire endurance of the coatings prepared in the examples of the present application was all 30min or more; as can be seen from fig. 1-6, after the fire resistance test, the coating prepared by the embodiments of the present application is easy to generate a relatively dense carbon layer at a high temperature, and the higher the quality of the generated carbon layer, the higher the fire resistance limit, and the better the fire-proof and heat-insulating properties of the powder coating.
The description shows that the fireproof coating provided by the invention is uniform in coating and high in coating efficiency, and when the intumescent flame retardant system in the formula is properly matched and the system has a proper crosslinking degree, the fireproof coating is easy to expand and foam, can generate a better foam carbon layer and generates a better fire resistance limit.
Claims (10)
1. A hot-dip molding powder fireproof coating is characterized by being prepared from the following raw materials:
thermoplastic matrix resin, an expansion flame-retardant system, a carbon layer reinforcing agent and a cross-linking agent;
the components are as follows by weight:
2. a hot dip plastic powder fire retardant coating as claimed in claim 1,
the components are as follows by weight:
3. a hot dip plastic powder fire retardant coating according to claim 1,
the hot-dip molding powder fireproof coating further comprises: smoke suppressant, leveling agent and degassing agent.
4. A hot dip plastic powder fire retardant coating as claimed in claim 1,
the thermoplastic matrix resin is one or a combination of polyethylene resin, polypropylene resin, ethylene-vinyl acetate, poly-p-hydroxybenzoate resin, polylactic acid, thermoplastic polyurethane and thermoplastic polyester.
5. A hot dip plastic powder fire retardant coating according to claim 1,
the expansion flame-retardant system is an expansion graphite and/or ammonium polyphosphate-pentaerythritol-melamine system;
the mass ratio of the three substances in the ammonium polyphosphate-pentaerythritol-melamine system is as follows: 15-40;
preferably, the first and second electrodes are formed of a metal,
the ammonium polyphosphate is subjected to surface modification by a silane coupling agent;
the silane coupling agent is one or a combination of gamma-aminopropyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma-propylacryloyloxypropyltrimethoxysilane and gamma-mercaptopropyltriethoxysilane.
6. A hot dip plastic powder fire retardant coating as claimed in claim 1,
the carbon layer reinforcing agent is one or a combination of titanium dioxide, fiber and nano attapulgite.
7. A hot dip plastic powder fire retardant coating according to claim 3,
the smoke suppressant is one or a combination of zinc oxide, molybdenum oxide, zinc aluminate, zinc borate, ammonium molybdate, ferrocene and aluminum hydroxide.
8. A hot dip plastic powder fire retardant coating as claimed in claim 1,
the cross-linking agent is one or a combination of dicumyl peroxide, benzoyl peroxide, tert-butyl peroxybenzoate, di-tert-butyl peroxide, 2, 4-dichlorobenzoyl peroxide and 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane.
9. Method for the preparation of a hot dip plastic powder fireproofing coating according to any one of the claims 1 to 8, characterized by the following steps:
blending, slicing and crushing the components except the cross-linking agent according to the weight parts; and then adding a cross-linking agent and mixing to prepare the hot-dip molding powder fireproof coating.
10. Use of a hot dip plastic powder fire retardant coating according to any one of claims 1-8, characterized in that the coating is applied to the surface of the workpiece by a hot dip plastic coating process.
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| CN115595021B (en) | 2023-11-21 |
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