CN114085600A - Polyaspartic acid ester polyurea radar wave-absorbing coating and preparation method thereof - Google Patents
Polyaspartic acid ester polyurea radar wave-absorbing coating and preparation method thereof Download PDFInfo
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- CN114085600A CN114085600A CN202111259316.9A CN202111259316A CN114085600A CN 114085600 A CN114085600 A CN 114085600A CN 202111259316 A CN202111259316 A CN 202111259316A CN 114085600 A CN114085600 A CN 114085600A
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- 238000000576 coating method Methods 0.000 title claims abstract description 46
- 239000011248 coating agent Substances 0.000 title claims abstract description 45
- 150000002148 esters Chemical class 0.000 title claims abstract description 39
- 108010064470 polyaspartate Proteins 0.000 title claims abstract description 33
- 229920000805 Polyaspartic acid Polymers 0.000 title claims abstract description 32
- 229920002396 Polyurea Polymers 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 31
- 229920000570 polyether Polymers 0.000 claims abstract description 31
- 229920005862 polyol Polymers 0.000 claims abstract description 27
- 239000002250 absorbent Substances 0.000 claims abstract description 16
- 230000002745 absorbent Effects 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 14
- -1 polyol isocyanate Chemical class 0.000 claims abstract description 13
- 239000012948 isocyanate Substances 0.000 claims abstract description 10
- 150000003077 polyols Chemical class 0.000 claims description 17
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 8
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- 208000005156 Dehydration Diseases 0.000 claims description 6
- 229920000608 Polyaspartic Polymers 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 6
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 4
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- XEVZIAVUCQDJFL-UHFFFAOYSA-N [Cr].[Fe].[Si] Chemical compound [Cr].[Fe].[Si] XEVZIAVUCQDJFL-UHFFFAOYSA-N 0.000 claims description 3
- 239000002518 antifoaming agent Substances 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- TWLCPLJMACDPFF-UHFFFAOYSA-N cyclohexane;1,2-diisocyanatoethane Chemical compound C1CCCCC1.O=C=NCCN=C=O TWLCPLJMACDPFF-UHFFFAOYSA-N 0.000 claims description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920001451 polypropylene glycol Polymers 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000013008 thixotropic agent Substances 0.000 claims description 3
- 239000000080 wetting agent Substances 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 13
- 239000011358 absorbing material Substances 0.000 abstract description 5
- 239000003973 paint Substances 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 4
- 238000007306 functionalization reaction Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920005749 polyurethane resin Polymers 0.000 description 3
- 238000007665 sagging Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012767 functional filler Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000003313 weakening effect Effects 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
- C09D175/02—Polyureas
-
- 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
- C09D5/32—Radiation-absorbing 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
- C08K2003/2265—Oxides; Hydroxides of metals of iron
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a polyaspartic acid ester polyurea radar wave-absorbing coating and a preparation method thereof, and belongs to the field of radar wave-absorbing materials. The invention comprises 5-25 parts of polyether polyol isocyanate prepolymer, 10-50 parts of polyaspartic acid ester, 30-85 parts of radar wave absorbent, 0-10 parts of auxiliary agent and 5-20 parts of solvent. Compared with the traditional radar wave-absorbing coating, the polyaspartic acid ester polyurea radar wave-absorbing coating has the advantages of short construction period and adjustable paint film drying time of 5-30min, can quickly realize radar stealth functionalization of a coating target, and has the characteristics of high strength, good elasticity and excellent durability.
Description
Technical Field
The invention discloses a polyaspartic acid ester polyurea radar wave-absorbing coating and a preparation method thereof, and belongs to the field of radar wave absorption.
Background
The radar wave-absorbing material technology is a technology for weakening, inhibiting, absorbing and deflecting target electromagnetic waves by designing and using certain specific materials. The radar wave-absorbing coating is a convenient, economic and good-adaptability wave-absorbing material, is originally developed for the radar wave-absorbing requirements of aerospace and aviation aircrafts, but with the development of scientific technology and the progress of social economy, the wave-absorbing coating also starts to be popularized and applied to ground equipment, ocean equipment and civil equipment. The radar absorbing paint of the existing epoxy resin system and polyurethane resin system has been widely applied due to the advantages of good adhesive force with the base material, good performance stability and the like. However, as the radar wave-absorbing performance is closely related to the thickness of the coating, in order to realize better radar wave-absorbing performance, the wave-absorbing coating usually has larger thickness (more than 0.4mm), which brings about the problem of some large-thickness coatings during construction.
Generally, when a large-thickness radar wave-absorbing material (embodied by conventional epoxy resin and polyurethane resin) is applied to a large-area large-thickness construction project, the phenomenon of sagging and the like easily occurs in the construction process, the construction strengthening period exceeds 7 days, the construction part needs to be strictly protected within 7 days, other operations cannot be carried out, and the radar stealth capability cannot be rapidly formed when a target is coated.
The quick construction performance of the radar wave-absorbing coating is very important for quick stealth functional modification of weaponry such as ships and warships. In this regard, there has been an urgent background on the ship: the ship does not need to be subjected to radar stealth function in a normal state, and needs to be subjected to quick stealth treatment in special periods such as wartime, so that the radar wave-absorbing coating has the characteristics of quick construction and short fixed telephone period
Disclosure of Invention
The purpose of the invention is as follows: the invention aims at the problems that the traditional radar wave-absorbing material (embodied by epoxy resin and polyurethane resin) has long construction and curing period and can not meet the requirement of quickly realizing radar stealth of a target. The invention provides a polyaspartic ester polyurea radar wave-absorbing coating which has the advantages of being difficult to sag in spraying, high in paint film drying speed (5-30min), high in strength, good in elasticity and excellent in durability, and can be used for solving the problem of long construction period of the existing large-thickness radar wave-absorbing coating, achieving the stealth function of a target radar more quickly and improving the engineering application performance of the radar wave-absorbing coating.
The technical scheme of the invention is as follows: a polyaspartic acid ester polyurea radar wave-absorbing coating is composed of a component A and a component B, wherein the component A comprises the following components in parts by weight: the component A is polyether polyol isocyanate prepolymer of 5-25 parts; the component B comprises the following components: 10-50 parts of polyaspartic acid ester, 30-85 parts of radar wave absorbent, 0-10 parts of auxiliary agent and 5-20 parts of solvent.
The radar wave absorbent is one or more of ferrite, carbonyl iron powder, iron silicon aluminum powder and iron silicon chromium powder.
The solvent is one or more of toluene, xylene, ethyl acetate, butyl acetate, butanone and cyclohexanone.
The auxiliary agent is one or more of an anti-settling agent, a thixotropic agent, a wetting agent, a defoaming agent and a flatting agent.
The anti-settling agent is one or more of polyamide wax powder, organic bentonite and white carbon black.
The preparation method of the polyether polyol isocyanate prepolymer comprises the following steps:
(1) weighing polyether polyol and aliphatic diisocyanate according to a proportion;
(2) adding polyether glycol into a reaction kettle, and performing dehydration treatment;
(3) and adding the dehydrated polyether polyol and the aliphatic diisocyanate into another reaction kettle to prepare the component A.
The preparation method of the polyaspartic acid ester polyurea radar wave-absorbing coating comprises the following steps of (1) and (2), wherein polyether polyol adopted in the steps is one or more of polyethylene glycol ether, polypropylene glycol ether, polypentaerythritol ether and polytetrahydrofuran ether glycol; the aliphatic diisocyanate in the steps (1) and (3) adopts at least one of hexamethylene diisocyanate, isophorone diisocyanate and cyclohexane dimethylene diisocyanate.
The method further comprises the steps of:
(1) grinding polyaspartic acid ester, radar wave absorbent, auxiliary agent and solvent to obtain a component B; the NCO group content in the polyether polyol isocyanate prepolymer is 5.0-8.6%;
(2) a, B components are mixed to obtain the polyaspartic acid ester polyurea radar wave-absorbing coating, wherein the mass ratio of the component A to the component B is A: b is 1: (4-35).
In the step (1), the weighing ratio of the polyether polyol to the aliphatic diisocyanate is (2-3): 1; the temperature of the dehydration operation in the step (2) is 100-; the reaction temperature of the dehydrated polyether polyol and the aliphatic diisocyanate in the step (3) is 60-80 ℃, and the reaction time is 1-3 h.
In the step (1), a three-roll grinder or a basket grinder is adopted to grind the polyaspartic acid ester, the radar wave absorbent, the auxiliary agent and the solvent until the granularity is less than or equal to 20 mu m, and the component B can be obtained after filtration.
The invention has the advantages that: according to the invention, a polyaspartic acid ester polyurea resin system is introduced into the radar wave-absorbing coating, compared with the traditional radar wave-absorbing coating, the prepared polyaspartic acid ester polyurea radar wave-absorbing coating has the advantages of short construction period and adjustable paint film drying time of 5-30min, can quickly realize radar stealth functionalization of a coated target, and meanwhile, the material has the characteristics of high strength, good elasticity and excellent durability.
Detailed Description
In the polyaspartic acid ester polyurea radar wave-absorbing coating provided by the invention, a radar wave absorbent is used as a functional filler, and plays a role in absorbing radar waves; the polyaspartic acid ester and polyether polyol isocyanate prepolymer are film-forming substances and have a bonding effect; the auxiliary agent is an auxiliary film forming substance, and plays a role in improving the dispersion of the coating, preventing the sedimentation of the filler and improving the construction performance of the coating; the solvent mainly plays a role in dissolving the resin and adjusting the viscosity of the coating. Through the reasonable proportioning reaction of the raw materials, the obtained polyaspartic acid ester polyurea radar wave-absorbing coating has the characteristics of difficult sagging during spraying, high drying speed (5-30min) of a paint film, high strength, good elasticity and excellent durability, can solve the problem of long construction period of the existing large-thickness radar wave-absorbing coating, realizes the stealth function of a target radar more quickly, and improves the engineering application performance of the radar wave-absorbing coating.
The invention provides a polyaspartic acid ester polyurea radar wave-absorbing coating which is composed of a component A and a component B, wherein the component A comprises the following components in parts by weight: the component A is polyether polyol isocyanate prepolymer of 5-25 parts; the component B comprises the following components: 10-50 parts of polyaspartic acid ester, 30-85 parts of radar wave absorbent, 0-10 parts of auxiliary agent and 5-20 parts of solvent.
The radar wave absorbent is one or more of ferrite, carbonyl iron powder, iron silicon aluminum powder and iron silicon chromium powder.
The solvent is one or more of toluene, xylene, ethyl acetate, butyl acetate, butanone and cyclohexanone.
The auxiliary agent is one or more of an anti-settling agent, a thixotropic agent, a wetting agent, a defoaming agent and a flatting agent.
The anti-settling agent is one or more of polyamide wax powder, organic bentonite and white carbon black.
A preparation method of polyaspartic acid ester pulse radar wave-absorbing coating comprises the following steps:
(1) weighing polyether polyol and aliphatic diisocyanate according to a proportion;
(2) adding polyether glycol into a reaction kettle, and performing dehydration treatment;
(3) and adding the dehydrated polyether polyol and the aliphatic diisocyanate into another reaction kettle to prepare the component A.
The polyether polyol adopted in the steps (1) and (2) is one or more of polyethylene glycol ether, polypropylene glycol ether, polypentaerythritol ether and polytetrahydrofuran ether glycol; the aliphatic diisocyanate in the steps (1) and (3) adopts at least one of hexamethylene diisocyanate, isophorone diisocyanate and cyclohexane dimethylene diisocyanate.
The method comprises the following steps:
(4) grinding polyaspartic acid ester, radar wave absorbent, auxiliary agent and solvent to obtain a component B; the NCO group content in the polyether polyol isocyanate prepolymer is 5.0-8.6%;
(5) a, B components are mixed to obtain the polyaspartic acid ester polyurea radar wave-absorbing coating, wherein the mass ratio of the component A to the component B is A: b is 1: (4-35).
The polyether polyol and the aliphatic diisocyanate in the step (1) are weighed according to the weight ratio of (2-3): 1; the temperature of the dehydration operation in the step (2) is 100-; the reaction temperature of the dehydrated polyether polyol and the aliphatic diisocyanate in the step (3) is 60-80 ℃, and the reaction time is 1-3 h.
In the step (4), a three-roll grinder or a basket grinder is adopted to grind the polyaspartic acid ester, the radar wave absorbent, the auxiliary agent and the solvent until the granularity is less than or equal to 20 mu m, and the component B can be obtained after filtration.
Example 1
First, preparation of component A
Adding 10 parts of polytetrahydrofuran ether glycol polyether into a first reaction kettle provided with a stirrer, a heating temperature control device and a condenser, heating to 100 ℃, and dehydrating for 2 hours under the vacuum degree of 0.08 MPa; mixing the dehydrated polyether polyol and 3 parts of isophorone diisocyanate at 60 ℃ and reacting for 2 hours until the theoretical value of the NCO group content reaches 8.0%.
Step two, preparing a component B:
weighing 20 parts of polyaspartic ester resin, 60 parts of ferrite radar wave absorbent, 6 parts of polyamide wax powder and 8 parts of dimethylbenzene, grinding the mixture by a three-rod grinder until the granularity is below 15 mu m, and filtering the mixture to obtain a component B.
Mixing the components in a mass ratio of A to B to 1 to 18 to obtain a coating, and carrying out air spraying.
Example 2
First, preparation of component A
Adding 20 parts of poly-pentaerythritol ether into a first reaction kettle provided with a stirrer, a heating temperature control device and a condenser, heating to 110 ℃, and dehydrating for 1h under the vacuum degree of 0.06 MPa; mixing the dehydrated polyether polyol and 10 parts of hexamethylene diisocyanate at 60 ℃ and reacting for 2 hours until the theoretical value of the NCO group content reaches 7.8%.
Step two, preparing a component B:
weighing 40 parts of polyaspartic ester resin, 35 parts of ferrite radar wave absorbent, 8 parts of organic bentonite and 15 parts of cyclohexanone, grinding the mixture by a basket grinder until the granularity is below 10 mu m, and filtering the mixture to obtain a component B.
Taking the mass ratio of A: b is 1: 10 to obtain a coating, and performing air spraying.
Claims (10)
1. The polyaspartic acid ester polyurea radar wave-absorbing coating is characterized by comprising a component A and a component B, wherein the component A comprises the following components in parts by weight: the component A is polyether polyol isocyanate prepolymer of 5-25 parts; the component B comprises the following components: 10-50 parts of polyaspartic acid ester, 30-85 parts of radar wave absorbent, 0-10 parts of auxiliary agent and 5-20 parts of solvent.
2. The poly (aspartic ester) polyurea radar wave-absorbing coating as claimed in claim 1, wherein the radar wave absorbent is one or more of ferrite, carbonyl iron powder, iron silicon aluminum powder and iron silicon chromium powder.
3. The polyaspartic acid ester polyurea radar wave-absorbing coating as claimed in claim 1, wherein the solvent is one or more of toluene, xylene, ethyl acetate, butyl acetate, butanone and cyclohexanone.
4. The polyaspartic acid ester polyurea radar wave-absorbing coating as claimed in claim 1, wherein the auxiliary agent is one or more of an anti-settling agent, a thixotropic agent, a wetting agent, an antifoaming agent and a leveling agent.
5. The poly aspartic ester polyurea radar wave-absorbing coating as claimed in claim 4, wherein the anti-settling agent is one or more of polyamide wax powder, organic bentonite and white carbon black.
6. The preparation method of the polyaspartic ester pulse radar wave-absorbing coating as claimed in claim 1, wherein the preparation method of the polyether polyol isocyanate prepolymer comprises the following steps:
(1) weighing polyether polyol and aliphatic diisocyanate according to a proportion;
(2) adding polyether glycol into a reaction kettle, and performing dehydration treatment;
(3) and adding the dehydrated polyether polyol and the aliphatic diisocyanate into another reaction kettle to prepare the component A.
7. The preparation method of the polyaspartate polyurea radar wave-absorbing coating according to claim 6, wherein the preparation method comprises the following steps: the polyether polyol adopted in the steps (1) and (2) is one or more of polyethylene glycol ether, polypropylene glycol ether, polypentaerythritol ether and polytetrahydrofuran ether glycol; the aliphatic diisocyanate in the steps (1) and (3) adopts at least one of hexamethylene diisocyanate, isophorone diisocyanate and cyclohexane dimethylene diisocyanate.
8. The preparation method of the polyaspartic ester pulse radar wave-absorbing coating as claimed in claim 1, wherein the method comprises the following steps:
(1) grinding polyaspartic acid ester, radar wave absorbent, auxiliary agent and solvent to obtain a component B; the NCO group content in the polyether polyol isocyanate prepolymer is 5.0-8.6%;
(2) a, B components are mixed to obtain the polyaspartic acid ester polyurea radar wave-absorbing coating, wherein the mass ratio of the component A to the component B is A: b is 1: (4-35).
9. The preparation method of the polyaspartic acid ester pulse-gathering radar wave-absorbing coating as claimed in claim 6, wherein the preparation method comprises the following steps: in the step (1), the weighing ratio of the polyether polyol to the aliphatic diisocyanate is (2-3): 1; the temperature of the dehydration operation in the step (2) is 100-; the reaction temperature of the dehydrated polyether polyol and the aliphatic diisocyanate in the step (3) is 60-80 ℃, and the reaction time is 1-3 h.
10. The preparation method of the polyaspartic acid ester pulse-gathering radar wave-absorbing coating as claimed in claim 8, wherein the preparation method comprises the following steps: in the step (1), a three-roll grinder or a basket grinder is adopted to grind the polyaspartic acid ester, the radar wave absorbent, the auxiliary agent and the solvent until the granularity is less than or equal to 20 mu m, and the component B can be obtained after filtration.
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| CN116496690A (en) * | 2022-10-12 | 2023-07-28 | 中国航发北京航空材料研究院 | High-elasticity high-toughness low-frequency radar wave-absorbing material and preparation method thereof |
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| CN102834474A (en) * | 2010-04-09 | 2012-12-19 | 拜尔材料科学有限公司 | Two-component, polyaspartic coating compositions |
| CN105238242A (en) * | 2015-08-20 | 2016-01-13 | 成都拜迪新材料有限公司 | Preparation method for low-VOC high-solid-content polyurea anticorrosive coating |
| CN108003695A (en) * | 2017-12-14 | 2018-05-08 | 航天科工武汉磁电有限责任公司 | A kind of rapid construction Radar Absorbing Coating and preparation method and application |
| CN109251643A (en) * | 2018-08-16 | 2019-01-22 | 游代华 | A kind of Polyaspartic Polyurea coating and its application |
| CN109354987A (en) * | 2018-11-14 | 2019-02-19 | 四川嘉宝莉涂料有限公司 | Surface drying time is moderate, is adapted to Polyaspartic Polyurea coating, preparation method, application method and the application of environmental change |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116496690A (en) * | 2022-10-12 | 2023-07-28 | 中国航发北京航空材料研究院 | High-elasticity high-toughness low-frequency radar wave-absorbing material and preparation method thereof |
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