CN116589915B - Heat shielding coating material and preparation method thereof - Google Patents
Heat shielding coating material and preparation method thereof Download PDFInfo
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- CN116589915B CN116589915B CN202310873106.1A CN202310873106A CN116589915B CN 116589915 B CN116589915 B CN 116589915B CN 202310873106 A CN202310873106 A CN 202310873106A CN 116589915 B CN116589915 B CN 116589915B
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- 239000011248 coating agent Substances 0.000 title claims abstract description 52
- 238000000576 coating method Methods 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 101
- 239000011324 bead Substances 0.000 claims abstract description 94
- 239000010445 mica Substances 0.000 claims abstract description 73
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 73
- 239000000843 powder Substances 0.000 claims abstract description 67
- 229920002635 polyurethane Polymers 0.000 claims abstract description 42
- 239000004814 polyurethane Substances 0.000 claims abstract description 42
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 38
- 229920000570 polyether Polymers 0.000 claims abstract description 38
- 230000000149 penetrating effect Effects 0.000 claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 11
- 239000007822 coupling agent Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 39
- 238000006243 chemical reaction Methods 0.000 claims description 32
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical group CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 30
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 28
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 20
- 239000004417 polycarbonate Substances 0.000 claims description 20
- 229920000515 polycarbonate Polymers 0.000 claims description 20
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 18
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003431 cross linking reagent Substances 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 16
- 239000012720 thermal barrier coating Substances 0.000 claims description 16
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 11
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 11
- 229920005862 polyol Polymers 0.000 claims description 10
- 150000003077 polyols Chemical class 0.000 claims description 10
- 238000001354 calcination Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 5
- NLSFWPFWEPGCJJ-UHFFFAOYSA-N 2-methylprop-2-enoyloxysilicon Chemical compound CC(=C)C(=O)O[Si] NLSFWPFWEPGCJJ-UHFFFAOYSA-N 0.000 claims description 4
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 claims description 4
- 229940102253 isopropanolamine Drugs 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000004971 Cross linker Substances 0.000 claims description 2
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims 1
- WFHALSLYRWWUGH-UHFFFAOYSA-N 2,3-dimethylpent-2-ene Chemical group CCC(C)=C(C)C WFHALSLYRWWUGH-UHFFFAOYSA-N 0.000 claims 1
- 239000006185 dispersion Substances 0.000 description 24
- 239000007788 liquid Substances 0.000 description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 18
- 239000013530 defoamer Substances 0.000 description 14
- 239000004744 fabric Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 239000004005 microsphere Substances 0.000 description 6
- -1 rare earth salt Chemical class 0.000 description 6
- 239000006260 foam Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- AQZABFSNDJQNDC-UHFFFAOYSA-N 2-[2,2-bis(dimethylamino)ethoxy]-1-n,1-n,1-n',1-n'-tetramethylethane-1,1-diamine Chemical compound CN(C)C(N(C)C)COCC(N(C)C)N(C)C AQZABFSNDJQNDC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- BXYVQNNEFZOBOZ-UHFFFAOYSA-N n-[3-(dimethylamino)propyl]-n',n'-dimethylpropane-1,3-diamine Chemical compound CN(C)CCCNCCCN(C)C BXYVQNNEFZOBOZ-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- GTEXIOINCJRBIO-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]-n,n-dimethylethanamine Chemical compound CN(C)CCOCCN(C)C GTEXIOINCJRBIO-UHFFFAOYSA-N 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
-
- 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
-
- 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
- C09D7/63—Additives non-macromolecular organic
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
Abstract
The application relates to the technical field of tent coating, and provides a heat shielding coating material and a preparation method thereof, wherein the coating material comprises, by weight, 80-100 parts of polyether polyurethane, 20-30 parts of mica powder modified glass beads, 3-7 parts of a coupling agent, 1-3 parts of a catalyst, 3-5 parts of a penetrating agent and 2-6 parts of a defoaming agent. The mica powder modified glass beads provided by the application have the advantages that the connection strength and elasticity between the glass beads are enhanced, and meanwhile, the heat shielding type of the coating is also improved, and the technical problem that the coating is cracked and falls off after the coating containing the glass beads is folded for many times is effectively solved.
Description
Technical Field
The application relates to the technical field of tent coating, in particular to a thermal shielding coating material and a preparation method thereof.
Background
The hollow glass microballoon has thin gas inside, so that it has sound and heat insulating performance, and is excellent stuffing for various heat and sound insulating products, especially tent coating. The insulating properties of the hollow glass microspheres can also be used to protect the product from thermal shock caused by alternating between rapid heating and quenching conditions. In the prior art, the hollow glass beads are added into the tent coating to achieve a better heat insulation effect, but the hollow glass beads have a fatal defect that cracks are easy to generate after bending, and the tent needs to be folded and placed after each use, so that the service life of the tent is greatly influenced.
The application patent with the patent number of CN113774682A adopts rare earth salt to treat the surfaces of the microbeads, improves the interfacial adhesion between glass fibers and resin and improves the performance of the composite material. The rare earth salt used in the patent has combustion supporting and irritation, and is not suitable for tent surface spraying.
Disclosure of Invention
In view of the above, the present application provides a thermal barrier coating material for tent coating and having excellent folding resistance and thermal insulation properties, and a method for preparing the same.
The technical scheme of the application is realized as follows: in one aspect, the application provides a heat shielding coating material, which comprises, by weight, 80-100 parts of polyether polyurethane, 20-30 parts of mica powder modified glass beads, 3-7 parts of a coupling agent, 1-3 parts of a catalyst, 3-5 parts of a penetrating agent and 2-6 parts of a defoaming agent.
On the basis of the technical scheme, preferably, the preparation method of the modified glass beads comprises the following steps: respectively dispersing mica powder and glass beads in 75-95% ethanol water solution by volume fraction, then adding the mixture into tetraethoxysilane together, and stirring and reacting for 2-5h under the condition of pH 8-10; and after the reaction is finished, filtering and drying, and then calcining for 2-3 hours at 400-600 ℃ to obtain the mica powder modified glass beads.
On the basis of the technical scheme, preferably, the mica powder comprises: glass beads: the weight ratio of the tetraethoxysilane is (3-8) to (15-25): (60-100).
On the basis of the technical scheme, preferably, the glass beads are hollow glass beads with the particle size of 40-60 mu m; the mica powder is sericite and has a particle size of 10-13 μm.
On the basis of the technical scheme, the method preferably further comprises polycarbonate and phthalic anhydride cross-linking agent, wherein the polycarbonate is prepared by the following steps: phthalic anhydride cross-linking agent: the weight ratio of the polyether polyurethane is (8-15): (3-5): (80-100).
On the basis of the technical scheme, preferably, the coupling agent is an epoxy silane coupling agent or a methacryloxy silane coupling agent.
On the basis of the technical scheme, preferably, the catalyst is one of triethylene diamine, tetramethyl dipropylene triamine, bis-dimethylaminopropyl isopropanolamine, N-dimethylbenzylamine and bis-dimethylaminoethyl ether.
On the basis of the technical scheme, preferably, the penetrating agent is polyether polyol or polyethylene glycol; the defoaming agent is an organosilicon defoaming agent or a polyether defoaming agent.
In another aspect, the present application also provides a method of preparing a thermal barrier coating material comprising the steps of:
s1, mixing polyether polyurethane, a catalyst and an organic solvent in proportion, and stirring and dissolving to obtain a polyurethane mixture;
s2, adding mica powder modified glass beads and a coupling agent into the polyurethane mixture, uniformly stirring, adding polycarbonate and phthalic anhydride crosslinking agent, heating a reaction system to 60-80 ℃, stirring and reacting for 2-3h, adding a penetrating agent and a defoaming agent, and uniformly stirring and defoaming to obtain the heat shielding layer coating material.
On the basis of the technical scheme, preferably, the organic solvents are methyl ethyl ketone and N, N-dimethylformamide, polyether polyurethane: methyl ethyl ketone: the mass ratio of the N, N-dimethylformamide is (80-100): (20-30): (10-20).
Compared with the prior art, the heat shielding coating material and the preparation method thereof have the following beneficial effects:
(1) The mica powder modified glass beads provided by the application have the advantages that the connection strength and elasticity between the glass beads are enhanced, the connection strength between the coating and cloth is improved, the strength of the coating is also improved, and the problem that the coating is cracked and falls off after the coating containing the glass beads is folded for many times is effectively solved.
(2) The ethanol and the tetraethoxysilane form silicon aerogel, have nanoscale pores, can be filled between glass beads or attached to the surfaces of the glass beads, and increase the viscosity between the glass beads; the mica powder is filled in the pores, and is combined with organic matters and solvents in the coating to form a compact network structure in the coating, so that the connection strength and elasticity between the glass beads are enhanced, the problem that the coating cracks after multiple bending is effectively solved, meanwhile, the strength of the glass beads is improved due to the fact that the mica powder is wrapped on the surfaces of the glass beads, and the effect of increasing the strength of the coating is achieved. The mica powder also plays a role in shielding ultraviolet rays, infrared rays and the like and delaying the aging of the coating.
(3) After the mica powder modified glass beads are easily aggregated, the dispersibility is poor, so that the polyol penetrating dispersant is added, the wettability of the paint and grey cloth is increased, and the effect of uniformly dispersing the mica powder modified glass beads is achieved.
(4) The compatibility of the modified mica powder glass beads with polyether polyurethane is poor, and the modified mica powder glass beads are modified by adopting an epoxy silane coupling agent or a methacryloxy silane coupling agent, so that the compatibility and the dispersibility of the glass beads and organic matters are improved.
(5) In order to increase the moisture permeability of the coating, the polycarbonate is added, so that the moisture permeability of the coating is increased, moisture in the tent can be conveniently dispersed, the weather property of the coating can be improved, and the problem of coating falling caused by high temperature in summer and low temperature in winter is effectively solved. The phthalic anhydride cross-linking agent improves the fatigue strength of the polycarbonate and enhances the folding resistance of the coating.
Detailed Description
The following description of the embodiments of the present application will clearly and fully describe the technical aspects of the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.
The reagents used in the application are purchased in the market, wherein the organosilicon defoamer (model MY-220, MY-230 and MY-208) and the polyether defoamer (model P-20, P-12 and P-06) are purchased from Shandong Meiyu chemical industry Co., ltd, and the polyether polyurethane is purchased from Jiangsu hong Guangdong plastic raw material Co., ltd, model 9868DU; mica powder is purchased from Guangdong Yongfeng chemical industry Co., ltd, and has the specification of 1000-1250 meshes; glass beads are purchased from Hebei Saina nano materials science and technology Co., ltd, and are made of alkali borosilicate glass. The epoxy silane coupling agent is 3- (2, 3-glycidoxy) propyl trimethoxy silane, which is purchased from Jinhui Jinchun commercial limited company, and the model is KH-560; the methacryloxy silane coupling agent is purchased from Jining Tang Yi chemical Co., ltd, and the model is KH-570.
Example 1
The thermal barrier coating material of this embodiment includes the following components: polyether polyurethane, mica powder modified glass beads, a silane coupling agent KH-560, a triethylene diamine catalyst, a polyether polyol penetrating agent and a MY-220 organic silicon defoamer. Wherein, the glass beads are hollow glass beads with the particle size of 40-60 μm; the mica powder is sericite with particle size of 10-13 μm.
The preparation method of the modified glass beads comprises the following steps: 30g of mica powder is ultrasonically dispersed in 100g of ethanol water solution with the volume fraction of 75%, so as to obtain mica dispersion liquid; 150g of glass beads were ultrasonically dispersed in 300g of an aqueous ethanol solution having a volume fraction of 75% to obtain a glass bead dispersion. Then adding the mica powder dispersion liquid and the glass bead dispersion liquid into a reaction kettle containing 600g of tetraethoxysilane, adding NaOH to adjust the pH of the system to 8, and stirring at a rotating speed of 3000r/min for reaction for 2 hours; and after the reaction is finished, filtering and drying the reaction system, and then calcining for 2 hours at 400 ℃ to obtain the mica powder modified glass beads.
A method of preparing a thermal barrier coating material comprising the steps of:
s1, adding 800g of polyether polyurethane, 10g of triethylene diamine catalyst, 200g of methyl ethyl ketone and 100g of N, N-dimethylformamide into a reaction kettle, uniformly mixing, and stirring and dissolving at a rotating speed of 2000r/min to obtain a polyurethane mixture;
s2, adding 200g of mica powder modified glass beads and 30g of silane coupling agent KH-560 into the polyurethane mixture, stirring uniformly at 2000r/min, adding 30g of polyether polyol penetrating agent and 20g of MY-220 organosilicon defoamer, and stirring uniformly to obtain the heat shielding layer coating material.
Example 2
The thermal barrier coating material of this embodiment includes the following components: polyether polyurethane, mica powder modified glass beads, a silane coupling agent KH-560, polycarbonate, a phthalic anhydride cross-linking agent, a triethylene diamine catalyst, a polyether polyol penetrating agent and a MY-220 organic silicon defoamer. Wherein, the glass beads are hollow glass beads with the particle size of 40-60 μm; the mica powder is sericite with particle size of 10-13 μm.
The preparation method of the modified glass beads comprises the following steps: 30g of mica powder is ultrasonically dispersed in 100g of ethanol water solution with the volume fraction of 75%, so as to obtain mica dispersion liquid; 150g of glass beads were ultrasonically dispersed in 300g of an aqueous ethanol solution having a volume fraction of 75% to obtain a glass bead dispersion. Then adding the mica powder dispersion liquid and the glass bead dispersion liquid into a reaction kettle containing 600g of tetraethoxysilane, adding NaOH to adjust the pH of the system to 8, and stirring at a rotating speed of 3000r/min for reaction for 2 hours; and after the reaction is finished, filtering and drying the reaction system, and then calcining for 2 hours at 400 ℃ to obtain the mica powder modified glass beads.
A method of preparing a thermal barrier coating material comprising the steps of:
s1, adding 800g of polyether polyurethane, 10g of triethylene diamine catalyst, 200g of methyl ethyl ketone and 100g of N, N-dimethylformamide into a reaction kettle, uniformly mixing, and stirring and dissolving at a rotating speed of 2000r/min to obtain a polyurethane mixture;
s2, adding 200g of mica powder modified glass beads and 30g of silane coupling agent KH-560 into the polyurethane mixture, stirring uniformly at 2000r/min, adding 80g of polycarbonate and 30g of phthalic anhydride cross-linking agent, stirring at 60 ℃ for 2 hours, adding 30g of polyether polyol penetrating agent and 20g of MY-220 organosilicon defoamer, and stirring uniformly to foam to obtain the heat shielding layer coating material.
Example 3
The thermal barrier coating material of this embodiment includes the following components: polyether polyurethane, mica powder modified glass beads, an alkane coupling agent KH-570, polycarbonate, a phthalic anhydride cross-linking agent, a tetramethyl-bisacryltriamine catalyst, a polyethylene glycol penetrating agent and a P-20 polyether defoamer. Wherein, the glass beads are hollow glass beads with the particle size of 40-60 μm; the mica powder is sericite with particle size of 10-13 μm.
The preparation method of the modified glass beads comprises the following steps: dispersing 40g of mica powder in 120g of ethanol water solution with the volume fraction of 95% by ultrasonic to obtain mica dispersion liquid; 150g of glass beads were ultrasonically dispersed in 320g of an aqueous ethanol solution having a volume fraction of 95% to obtain a glass bead dispersion. Then adding the mica powder dispersion liquid and the glass microsphere dispersion liquid into a reaction kettle containing 650g of tetraethoxysilane, adding NaOH to adjust the pH of the system to 9, and stirring at 3500r/min for reaction for 3 hours; and after the reaction is finished, filtering, drying, and then calcining for 3 hours at 450 ℃ to obtain the mica powder modified glass beads.
A method of preparing a thermal barrier coating material comprising the steps of:
s1, adding 850g of polyether polyurethane, 1.50g of tetramethyl-dipropylene triamine catalyst, 220g of methyl ethyl ketone and 150g of N, N-dimethylformamide into a reaction kettle, uniformly mixing, and stirring and dissolving at a rotating speed of 2000r/min to obtain a polyurethane mixture;
s2, adding 230g of mica powder modified glass beads and 40g of silane coupling agent KH-570 into the polyurethane mixture, stirring uniformly at 2000r/min, adding 100g of polycarbonate and 40g of phthalic anhydride cross-linking agent, stirring at 60 ℃ for 2 hours, adding 40g of polyethylene glycol penetrating agent and 30g P-20 polyether defoamer, and stirring uniformly to foam to obtain the heat shielding layer coating material.
Example 4
The thermal barrier coating material of this embodiment includes the following components: polyether polyurethane, mica powder modified glass beads, a silane coupling agent KH-570, polycarbonate, a phthalic anhydride cross-linking agent, a bis-dimethylaminopropyl isopropanolamine catalyst, a polyether polyol penetrating agent and a MY-230 organic silicon defoamer. Wherein, the glass beads are hollow glass beads with the particle size of 40-60 μm; the mica powder is sericite with particle size of 10-13 μm.
The preparation method of the modified glass beads comprises the following steps: 50g of mica powder is ultrasonically dispersed in 150g of ethanol water solution with the volume fraction of 95%, so as to obtain mica dispersion liquid; dispersing 180g of glass beads in 350g of ethanol water solution with the volume fraction of 95% by ultrasonic to obtain glass bead dispersion liquid; then adding the mica powder dispersion liquid and the glass microsphere dispersion liquid into a reaction kettle containing 700g of tetraethoxysilane, adding NaOH to adjust the pH of the system to 10, and stirring at 3500r/min for reaction for 3 hours; and after the reaction is finished, filtering and drying, and then calcining for 2.5 hours at the temperature of 500 ℃ to obtain the mica powder modified glass beads.
The preparation method of the heat shielding coating material comprises the following steps:
s1, adding 900g of polyether polyurethane, 2.50g of dimethylaminopropyl isopropanolamine catalyst, 250g of methyl ethyl ketone and 200g of N, N-dimethylformamide into a reaction kettle, uniformly mixing, and stirring and dissolving at a rotating speed of 2000r/min to obtain a polyurethane mixture;
s2, adding 250g of mica powder modified glass beads and 60g of silane coupling agent KH-570 into the polyurethane mixture, stirring uniformly at 2000r/min, adding 120g of polycarbonate and 50g of phthalic anhydride cross-linking agent, stirring at 80 ℃ for 2 hours, adding 50g of polyether polyol penetrating agent and 50g of MY-230 organosilicon defoamer, and stirring uniformly to foam to obtain the heat shielding layer coating material.
Example 5
The thermal barrier coating material of this embodiment includes the following components: polyether polyurethane, mica powder modified glass beads, a silane coupling agent KH-560, polycarbonate, a phthalic anhydride cross-linking agent, an N, N-dimethylbenzylamine catalyst, a polyethylene glycol penetrating agent and a P-12 polyether defoamer. Wherein, the glass beads are hollow glass beads with the particle size of 40-60 μm; the mica powder is sericite with particle size of 10-13 μm.
The preparation method of the modified glass beads comprises the following steps: dispersing 80g of mica powder into 200g of ethanol water solution with the volume fraction of 95% by ultrasonic to obtain mica dispersion liquid; 200g of glass beads are ultrasonically dispersed in 380g of ethanol water solution with the volume fraction of 95%, so as to obtain glass beads dispersion liquid; then adding the mica powder dispersion liquid and the glass bead dispersion liquid into a reaction kettle containing 800g of tetraethoxysilane, adding NaOH to adjust the pH of the system to 10, and stirring at a rotating speed of 3000r/min for reaction for 4 hours; and after the reaction is finished, filtering, drying, and then calcining for 2 hours at 600 ℃ to obtain the mica powder modified glass microspheres.
The preparation method of the heat shielding coating material comprises the following steps:
s1, adding 1000g of polyether polyurethane, 30g of N, N-dimethylbenzylamine catalyst, 300g of methyl ethyl ketone and 200g of N, N-dimethylformamide into a reaction kettle, uniformly mixing, and stirring and dissolving at a rotating speed of 2000r/min to obtain a polyurethane mixture;
s2, adding 300g of mica powder modified glass beads and 70g of silane coupling agent KH-560 into the polyurethane mixture, stirring uniformly at 2000r/min, adding 150g of polycarbonate and 50g of phthalic anhydride cross-linking agent, stirring at 80 ℃ for 3 hours, adding 50g of polyethylene glycol penetrating agent and 40g P-12 polyether defoamer, and stirring uniformly to foam to obtain the heat shielding layer coating material.
Example 6
The thermal barrier coating material of this embodiment includes the following components: polyether polyurethane, mica powder modified glass beads, a silane coupling agent KH-570, polycarbonate, a phthalic anhydride cross-linking agent, a bis-dimethylaminoethyl ether catalyst, a polyethylene glycol penetrating agent and a MY-208 organosilicon defoamer. Wherein, the glass beads are hollow glass beads with the particle size of 40-60 μm; the mica powder is sericite with particle size of 10-13 μm.
The preparation method of the modified glass beads comprises the following steps: dispersing 70g of mica powder into 180g of ethanol water solution with the volume fraction of 95% by ultrasonic to obtain mica dispersion liquid; dispersing 250g of glass beads in 400g of ethanol water solution with the volume fraction of 95% by ultrasonic to obtain glass bead dispersion liquid; adding the mica powder dispersion liquid and the glass microsphere dispersion liquid into a reaction kettle containing 750g of tetraethoxysilane, adding NaOH to adjust the pH of the system to 10, and stirring at a rotating speed of 3000r/min for reaction for 5 hours; and after the reaction is finished, filtering and drying, and then calcining for 2.5 hours at 600 ℃ to obtain the mica powder modified glass beads.
The preparation method of the heat shielding coating material comprises the following steps:
s1, adding 1000g of polyether polyurethane, 30g of bis (dimethylaminoethyl) ether catalyst, methyl ethyl ketone and 200g of N, N-dimethylformamide into a reaction kettle, uniformly mixing, and stirring and dissolving at a rotating speed of 2000r/min to obtain a polyurethane mixture;
s2, adding 300g of mica powder modified glass beads and 70g of coupling agent KH-570 into the polyurethane mixture, stirring uniformly at 2000r/min, adding 150g of polycarbonate and 50g of phthalic anhydride cross-linking agent, stirring at 80 ℃ for reaction for 3 hours, adding 50g of polyethylene glycol penetrating agent and 60g of MY-208 organosilicon defoamer, and stirring uniformly to foam, thus obtaining the heat shielding layer coating material.
Comparative example 1
Comparative example 1 compared with example 1, the glass beads were directly added to the polyurethane mixture without modification of the mica powder to prepare a coating material.
Comparative example 2
Comparative example 2 in comparison with example 1, the mica powder and glass beads were added directly to the polyurethane mixture without an aerosol reaction and calcination.
Comparative example 3
Comparative example 3 compared to example 1, mica powder: the weight ratio of the glass beads is 1:1, and the content of the glass beads is 30g.
Comparative example 4
Comparative example 4 in comparison with example 1, an amino silane coupling agent was used as the coupling agent.
Comparative example 5
Comparative example 5 in comparison with example 2, the crosslinker is a polyisocyanate.
Comparative example 6
Comparative example 6 in comparison with example 1, the wetting agent was alkylphenol ethoxylate.
To verify the heat shielding effect of the coating, the cloth used was undyed white grey cloth. The coating material is uniformly coated on white grey cloth, and the white grey cloth is dried to prepare a tent, and the characteristics of tearing strength, heat shielding effect, moisture permeability, water resistance, ultraviolet isolation effect, low-temperature foldability and the like of the tent are detected.
Tear strength: the tearing strength of the grey cloth after coating was measured by means of a YG0268 electronic fabric strength meter, with reference to GB/T3917.3-2009 "measurement of tearing strength of textile fabric tearing strength 3 rd part of trapezoid sample" measuring tear strength of grey cloth before coating, which is 50N.
Heat shielding effect: the tent prepared by the grey cloth is placed outdoors under the sun for 3 hours at the temperature of 38-40 ℃ outdoors in summer and at the temperature of 12-14 pm, the temperature difference between the inside and the outside of the tent between 3 hours is tested, 1 time is measured every 1 hour, and the result is an average value of 3 times.
Moisture permeability: the moisture permeability of the coating is measured by referring to GB/T127041-2009 fabric moisture permeability test method, the temperature is 38+/-2 ℃, and the relative humidity is 90+/-2%.
Waterproof property: the water repellency was tested with reference to GB/T4745-1997 test for moisture resistance determination of textile surface Water staining.
Ultraviolet isolation effect: the ultraviolet isolation effect is tested by referring to GB/T18830-2009 evaluation of ultraviolet resistance of textiles.
Low temperature resistance: the temperature was set at-40℃with reference to FZ/T01007-2008 determination of Low temperature resistance of coated fabrics.
Low temperature folding endurance: and (3) testing the low-temperature folding resistance by referring to FZ/T01135-2018 'test method of the low-temperature folding resistance of the coated fabric', and recording the number of times of flexing when cracks appear.
Table 1 shows that the coating of examples 1-6 has an internal and external temperature difference of 10-12 ℃, can resist 50+UPF ultraviolet rays, has strong low temperature resistance, has a low temperature folding resistance of more than 665 times, has a tearing strength of 71-83N and has a moisture permeability of 2030g/m 2 24h, the coating provided by the application has the advantages of good heat shielding effect, good folding resistance, high strength and good waterproof and breathable properties.
The comparison of the example 1 and the example 2 shows that the polycarbonate enhances the moisture permeability and the weather resistance of the coating, and effectively solves the problem of paint falling caused by high temperature in summer and low temperature in winter. As can be seen from comparison of example 1 and comparative example 1, the modified glass beads of mica powder improved the folding resistance and heat shielding properties of the coating, and could block 50+UPF ultraviolet rays. As can be seen from comparison of example 1 and comparative example 2, the mica powder is coated on the surface of the glass beads by the silica aerosol, thereby increasing the physical and chemical properties of the coating. In comparison between example 1 and comparative example 3, it is found that excessive mica powder does not affect the ultraviolet isolation strength, but does affect other physical properties. As can be seen from comparison of example 1 and comparative example 4, the epoxy-based silane coupling agent or the methacryloxy-based silane coupling agent improves the compatibility of the glass beads with organic substances. Comparison of example 2 with comparative example 5 shows that the phthalic anhydride cross-linking agent improves the fatigue strength of the polycarbonate and enhances the folding endurance of the coating. As can be seen from a comparison of example 1 and comparative example 6, the polyol wetting agent has the effect of increasing the wettability of the paint and dispersing the mica powder modified glass microspheres.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the application.
Claims (5)
1. A thermal barrier coating material characterized by: the polyurethane comprises, by weight, 80-100 parts of polyether polyurethane, 20-30 parts of mica powder modified glass beads, 3-7 parts of a coupling agent, 1-3 parts of a catalyst, 3-5 parts of a penetrating agent and 2-6 parts of a defoaming agent;
the preparation method of the mica powder modified glass beads comprises the following steps: respectively dispersing mica powder and glass beads in 75-95% ethanol water solution by volume fraction, then adding the mixture into tetraethoxysilane together, and stirring and reacting for 2-5h under the condition of pH 8-10; after the reaction is finished, filtering and drying, and then calcining for 2-3 hours at 400-600 ℃ to obtain mica powder modified glass beads;
also included are polycarbonates and phthalic anhydride cross-linkers, the polycarbonates: phthalic anhydride cross-linking agent: the weight ratio of the polyether polyurethane is 8-15:3-5:80-100;
the coupling agent is an epoxy silane coupling agent or a methacryloxy silane coupling agent;
the catalyst is one of triethylene diamine, tetramethyl-propylene triamine, dimedo-dimethylaminopropyl isopropanolamine, N-dimethylbenzylamine and dimedo-dimethylaminoethyl ether;
the penetrating agent is polyether polyol or polyethylene glycol; the defoaming agent is an organosilicon defoaming agent or a polyether defoaming agent.
2. A thermal barrier coating material as set forth in claim 1, wherein: the mica powder comprises the following components: glass beads: the weight ratio of the tetraethoxysilane is 3-8:15-25:60-100.
3. A thermal barrier coating material as set forth in claim 2 wherein: the glass beads are hollow glass beads with the particle size of 40-60 mu m; the mica powder is sericite and has a particle size of 10-13 μm.
4. A method of preparing a thermal barrier coating material as set forth in claim 1, wherein: the method comprises the following steps:
s1, mixing polyether polyurethane, a catalyst and an organic solvent in proportion, and stirring and dissolving to obtain a polyurethane mixture;
s2, adding mica powder modified glass beads and a coupling agent into the polyurethane mixture, uniformly stirring, adding polycarbonate and phthalic anhydride crosslinking agent, heating a reaction system to 60-80 ℃, stirring and reacting for 2-3h, adding a penetrating agent and a defoaming agent, and uniformly stirring and defoaming to obtain the heat shielding layer coating material.
5. A method of preparing a thermal barrier coating material as recited in claim 4, wherein: the organic solvent is methyl ethyl ketone, N-dimethylformamide and polyether polyurethane: methyl ethyl ketone: the mass ratio of the N, N-dimethylformamide is 80-100:20-30:10-20.
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