CN116751553A - Double-component polyurethane sealant and application thereof in unmanned aerial vehicle field - Google Patents
Double-component polyurethane sealant and application thereof in unmanned aerial vehicle field Download PDFInfo
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- CN116751553A CN116751553A CN202310694993.6A CN202310694993A CN116751553A CN 116751553 A CN116751553 A CN 116751553A CN 202310694993 A CN202310694993 A CN 202310694993A CN 116751553 A CN116751553 A CN 116751553A
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- Prior art keywords
- amino
- diisocyanate
- polyurethane sealant
- terminated polyimide
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004588 polyurethane sealant Substances 0.000 title claims abstract description 27
- 239000004642 Polyimide Substances 0.000 claims abstract description 60
- 229920001721 polyimide Polymers 0.000 claims abstract description 60
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims abstract description 37
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 33
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 33
- 239000000945 filler Substances 0.000 claims abstract description 30
- 239000007822 coupling agent Substances 0.000 claims abstract description 29
- 239000004014 plasticizer Substances 0.000 claims abstract description 29
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 20
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 11
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- 229920005862 polyol Polymers 0.000 claims description 25
- 150000003077 polyols Chemical class 0.000 claims description 25
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 20
- YBRVSVVVWCFQMG-UHFFFAOYSA-N 4,4'-diaminodiphenylmethane Chemical compound C1=CC(N)=CC=C1CC1=CC=C(N)C=C1 YBRVSVVVWCFQMG-UHFFFAOYSA-N 0.000 claims description 16
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 16
- 150000002009 diols Chemical class 0.000 claims description 16
- 229920000515 polycarbonate Polymers 0.000 claims description 16
- 239000004417 polycarbonate Substances 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- VGHSXKTVMPXHNG-UHFFFAOYSA-N 1,3-diisocyanatobenzene Chemical compound O=C=NC1=CC=CC(N=C=O)=C1 VGHSXKTVMPXHNG-UHFFFAOYSA-N 0.000 claims description 11
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 11
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical group CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- QEROATAKCLNWHV-UHFFFAOYSA-N 1-isocyanato-2-(4-isocyanatophenyl)sulfanylbenzene Chemical compound C1=CC(N=C=O)=CC=C1SC1=CC=CC=C1N=C=O QEROATAKCLNWHV-UHFFFAOYSA-N 0.000 claims description 9
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 9
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 9
- XYXCXCJKZRDVPU-UHFFFAOYSA-N hexane-1,2,3-triol Chemical compound CCCC(O)C(O)CO XYXCXCJKZRDVPU-UHFFFAOYSA-N 0.000 claims description 8
- HXYCHJFUBNTKQR-RNFRBKRXSA-N (2R,3R)-heptane-1,2,3-triol Chemical compound CCCC[C@@H](O)[C@H](O)CO HXYCHJFUBNTKQR-RNFRBKRXSA-N 0.000 claims description 6
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 claims description 6
- GFNKTLQTQSALEJ-UHFFFAOYSA-N 1-isocyanato-4-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(N=C=O)C=C1 GFNKTLQTQSALEJ-UHFFFAOYSA-N 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- UOQACRNTVQWTFF-UHFFFAOYSA-N decane-1,10-dithiol Chemical compound SCCCCCCCCCCS UOQACRNTVQWTFF-UHFFFAOYSA-N 0.000 claims description 6
- 229940117389 dichlorobenzene Drugs 0.000 claims description 5
- RAJLHDDMNNFKNT-FSIIMWSLSA-N (1S,2S,3R,6S)-6-aminocyclohex-4-ene-1,2,3-triol Chemical compound N[C@H]1C=C[C@@H](O)[C@H](O)[C@H]1O RAJLHDDMNNFKNT-FSIIMWSLSA-N 0.000 claims description 3
- LMMTVYUCEFJZLC-UHFFFAOYSA-N 1,3,5-pentanetriol Chemical compound OCCC(O)CCO LMMTVYUCEFJZLC-UHFFFAOYSA-N 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- ZVFDTKUVRCTHQE-UHFFFAOYSA-N Diisodecyl phthalate Chemical compound CC(C)CCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC(C)C ZVFDTKUVRCTHQE-UHFFFAOYSA-N 0.000 claims description 3
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- FSDSKERRNURGGO-UHFFFAOYSA-N cyclohexane-1,3,5-triol Chemical compound OC1CC(O)CC(O)C1 FSDSKERRNURGGO-UHFFFAOYSA-N 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- ZRJPJJSLXARURS-UHFFFAOYSA-N naphthalene-1,2,4-triol Chemical compound C1=CC=CC2=C(O)C(O)=CC(O)=C21 ZRJPJJSLXARURS-UHFFFAOYSA-N 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 claims description 2
- 125000005442 diisocyanate group Chemical group 0.000 claims description 2
- 230000006750 UV protection Effects 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000004814 polyurethane Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 10
- 229920002635 polyurethane Polymers 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 9
- 239000000565 sealant Substances 0.000 description 9
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 9
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 8
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 238000010992 reflux Methods 0.000 description 8
- 235000012239 silicon dioxide Nutrition 0.000 description 8
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 229920005906 polyester polyol Polymers 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical group OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WWEXBGFSEVKZNE-UHFFFAOYSA-N N=C=O.N=C=O.C1=CC=CC2=CC=CC=C21 Chemical compound N=C=O.N=C=O.C1=CC=CC2=CC=CC=C21 WWEXBGFSEVKZNE-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Substances C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000005462 imide group Chemical group 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 235000014692 zinc oxide Nutrition 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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4063—Mixtures of compounds of group C08G18/62 with other macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
- C08G18/6415—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63 having nitrogen
- C08G18/6438—Polyimides or polyesterimides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6659—Compounds of group C08G18/42 with compounds of group C08G18/34
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
Abstract
The invention provides polyurethane sealant, which comprises the following preparation raw materials: and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer; and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant. The polyurethane sealant provided by the invention has excellent ultraviolet resistance; the prepared molecular weight distribution is narrower, and the product performance is stable; has good wettability to the product and improves the viscosity and mechanical property.
Description
Technical Field
The invention relates to the technical field of sealants, in particular to a double-component polyurethane sealant and application thereof in the field of unmanned aerial vehicles.
Background
Currently, polymers used for adhesives include polyurethane, polyacrylate, and other polymers. Polyurethane is widely used because of its strong tackiness, good low temperature resistance, flexibility, abrasion resistance, etc. Polyurethane (PU), which is a high molecular compound, is known as polyurethane. It is mainly polyester type and polyether type two broad categories.
Polyurethane has such excellent characteristics, but its use is limited due to disadvantages such as heat resistance, non-water resistance, etc.
Polyimide is one kind of polymer with imide ring in the main chain and is one of organic polymer material with optimal comprehensive performance and high temperature resistance up to 400 deg.c. Polyimide can compensate some defects of polyurethane, so polyimide modified polyurethane is considered to increase the use scene.
The patent CN114874743B provides a high-adhesion UV light-cured polyurethane adhesive and a preparation method thereof, wherein the adopted polyester polyol is synthesized by sebacic acid, neopentyl glycol and 1, 6-hexanediol, and has a molecular weight of 2000-3000 and a functionality of 2; the obtained high-adhesion UV light-cured polyurethane adhesive has better high-low temperature performance and hydrolysis resistance than the conventional UV light-cured polyurethane adhesive, and has wide application range.
The patent CN113845651B provides a polyester polyol and a polyurethane adhesive prepared from the polyester polyol, wherein the polyester polyol provided by the invention introduces disulfide bonds and catechol structures into the structure of the polyester polyol through the component C), and after the polyester polyol with the structure is used for preparing the adhesive, the catechol structures increase the adhesive force between the adhesive and a substrate, so that the adhesive has excellent adhesive property.
Aiming at the situation, the polyurethane sealant provided by the invention has excellent mechanical properties, strong waterproof and ultraviolet-resistant properties, narrow molecular weight distribution and stable performance in the aspect of actual processing.
Disclosure of Invention
The invention provides a double-component polyurethane sealant, which comprises the following raw materials:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Preferably, the polyisocyanate is selected from one or more of p-nitrophenyl isocyanate, 1, 3-benzenediyl diisocyanate, 2, 4-trimethylhex-1, 6-diyl diisocyanate, naphthalene diisocyanate, 1, 3-bis (isocyanatomethyl) benzene, decane-1, 10-diisocyanate, 3 '-dichlorobenzene 4,4' -diisocyanate, 2- [ (4-isocyanatophenyl) thio ] phenyl isocyanate.
Preferably, the polyisocyanate is selected from one or more of p-nitrophenyl isocyanate, 1, 3-bis (isocyanatomethyl) benzene, decane-1, 10-diisocyanate, 3 '-dichlorobenzene 4,4' -diisocyanate.
Preferably, the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating, stirring, dissolving, adding 4,4' -diaminodiphenyl methane, reacting for a period of time, and cooling to obtain amino-terminated polyimide;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and the 2,2' -dimethylolpropionic acid prepared in the step S01, heating and dissolving, adding 1, 3-benzenediyl diisocyanate and a catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing reacting for 4 hours; obtaining the product.
Preferably, the polyol is selected from one or more of triethanolamine, heptane-1, 2, 3-triol, naphthalene-1, 2, 4-triol, (1 s,2s,3r,6 s) -6-amino-4-cyclohexene-1, 2, 3-triol, 5-chloro-meta-xylene-2, alpha ' -triol, 1,3, 5-cyclohexane triol, 1,2, 3-hexanetriol, 5' -isopropylidenedi (m-xylene-2, alpha ' -triol), 1,3, 5-pentanetriol.
Preferably, the plasticizer is dioctyl phthalate and/or diisodecyl phthalate.
Preferably, the coupling agent comprises a silane coupling agent.
Preferably, the filler is selected from one or more of silica, titanium dioxide, zinc oxide, calcium carbonate, kaolin.
Preferably, the filler is silica.
In another aspect, the invention provides the polyurethane sealant, which is applied to the field of unmanned aerial vehicles.
By adopting the technical scheme, the invention has the following beneficial effects:
1. the polyurethane sealant provided by the invention has excellent waterproof and ultraviolet-proof properties;
2. the prepared molecular weight distribution is narrower, and the product performance is stable.
Detailed Description
The following description of the present invention will be made clearly and fully, and it is apparent that the embodiments described are some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides polyurethane sealant, which comprises the following preparation raw materials:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Amino-terminated polyimide modified polyurethane prepolymer
Wherein: the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating to 40 ℃, stirring and dissolving, adding 4,4' -diaminodiphenyl methane, reacting for 3 hours at 120 ℃, and cooling to obtain amino-terminated polyimide; wherein, the mol ratio of bisphenol A type diether dianhydride to 4,4' -diaminodiphenyl methane is 1:1.1; the mol ratio of bisphenol A type diether dianhydride to N-methyl pyrrolidone is 1:3;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and 2,2' -dimethylolpropionic acid prepared in the step S01 under the conditions of nitrogen introduction and reflux condensation, heating to dissolve, adding 1, 3-xylyl diisocyanate and catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing to react for 4 hours; obtaining the product. Wherein the molar ratio of the polycarbonate diol, the amino-terminated polyimide, the 2,2' -dimethylolpropionic acid, the 1, 3-benzenediyl diisocyanate and the polyol is 1:0.3:1:0.8:1.7.
Wherein the polyol is selected from one or more of triethanolamine, heptane-1, 2, 3-triol, naphthalene-1, 2, 4-triol, (1S, 2S,3R, 6S) -6-amino-4-cyclohexene-1, 2, 3-triol, 5-chloro-m-xylene-2, alpha ' -triol, 1,3, 5-cyclohexane triol, 1,2, 3-hexanetriol, 5' -isopropylidenedi (m-xylene-2, alpha ' -triol), 1,3, 5-pentanetriol; more preferably: 1,2, 3-hexanetriol.
Polyisocyanates
The polyisocyanate is selected from one or more of p-nitrophenyl isocyanate, 1, 3-benzene di-isocyanate, 2, 4-trimethyl hexyl-1, 6-di-isocyanate, naphthalene di-isocyanate, 1, 3-di (isocyanatomethyl) benzene, decane-1, 10-diisocyanate, 3 '-dichloro biphenyl 4,4' -diisocyanate and 2- [ (4-isocyanatophenyl) thio ] phenyl isocyanate.
Preferably, the polyisocyanate is selected from one or more of p-nitrophenyl isocyanate, 1, 3-bis (isocyanatomethyl) benzene, decane-1, 10-diisocyanate, 3 '-dichlorobenzene 4,4' -diisocyanate.
More preferably, the polyisocyanate is 2- [ (4-isocyanatophenyl) thio ] phenylisocyanate.
Coupling agent
The coupling agent comprises a silane coupling agent, specifically one selected from vinyl triethoxysilane, ethyl triethoxysilane and methyl triethoxysilane, preferably methyl triethoxysilane.
Plasticizer(s)
The plasticizer is dioctyl phthalate and/or diisodecyl phthalate, and specifically dioctyl phthalate.
Packing material
The filler is selected from one or more of silicon dioxide, titanium dioxide, zinc oxide, calcium carbonate and kaolin; preferably silica.
Antioxidant
The antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:4.
the following describes in detail specific embodiments.
Example 1
The embodiment provides a polyurethane sealant, and the preparation raw materials of the sealant include:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Amino-terminated polyimide modified polyurethane prepolymer
Wherein: the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating to 40 ℃, stirring and dissolving, adding 4,4' -diaminodiphenyl methane, reacting for 3 hours at 120 ℃, and cooling to obtain amino-terminated polyimide; wherein, the mol ratio of bisphenol A type diether dianhydride to 4,4' -diaminodiphenyl methane is 1:1.1; the mol ratio of bisphenol A type diether dianhydride to N-methyl pyrrolidone is 1:3;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and 2,2' -dimethylolpropionic acid prepared in the step S01 under the conditions of nitrogen introduction and reflux condensation, heating to dissolve, adding 1, 3-xylyl diisocyanate and catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing to react for 4 hours; obtaining the product. Wherein the molar ratio of the polycarbonate diol, the amino-terminated polyimide, the 2,2' -dimethylolpropionic acid, the 1, 3-benzenediyl diisocyanate and the polyol is 1:0.3:1:0.8:1.7.
Wherein the polyol is 1,2, 3-hexanetriol; the polyisocyanate is 2- [ (4-isocyanatophenyl) thio ] phenylisocyanate; the coupling agent is methyltriethoxysilane; the plasticizer is dioctyl phthalate; the filler is silicon dioxide; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:4.
wherein the proportion of the amino-terminated polyimide modified polyurethane prepolymer, the polyisocyanate, the plasticizer, the coupling agent and the filler is 1:0.65:0.05:0.02:0.1:0.01.
example 2
The embodiment provides a polyurethane sealant, and the preparation raw materials of the sealant include:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Amino-terminated polyimide modified polyurethane prepolymer
Wherein: the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating to 40 ℃, stirring and dissolving, adding 4,4' -diaminodiphenyl methane, reacting for 3 hours at 120 ℃, and cooling to obtain amino-terminated polyimide; wherein, the mol ratio of bisphenol A type diether dianhydride to 4,4' -diaminodiphenyl methane is 1:1.1; the mol ratio of bisphenol A type diether dianhydride to N-methyl pyrrolidone is 1:3;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and 2,2' -dimethylolpropionic acid prepared in the step S01 under the conditions of nitrogen introduction and reflux condensation, heating to dissolve, adding 1, 3-xylyl diisocyanate and catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing to react for 4 hours; obtaining the product. Wherein the molar ratio of the polycarbonate diol, the amino-terminated polyimide, the 2,2' -dimethylolpropionic acid, the 1, 3-benzenediyl diisocyanate and the polyol is 1:0.3:1:0.8:1.7.
Wherein the polyol is heptane-1, 2, 3-triol; the polyisocyanate is 2- [ (4-isocyanatophenyl) thio ] phenylisocyanate; the coupling agent is methyltriethoxysilane; the plasticizer is dioctyl phthalate; the filler is silicon dioxide; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:4.
wherein the proportion of the amino-terminated polyimide modified polyurethane prepolymer, the polyisocyanate, the plasticizer, the coupling agent and the filler is 1:0.65:0.05:0.02:0.1:0.01.
example 3
The embodiment provides a polyurethane sealant, and the preparation raw materials of the sealant include:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Amino-terminated polyimide modified polyurethane prepolymer
Wherein: the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating to 40 ℃, stirring and dissolving, adding 4,4' -diaminodiphenyl methane, reacting for 3 hours at 120 ℃, and cooling to obtain amino-terminated polyimide; wherein, the mol ratio of bisphenol A type diether dianhydride to 4,4' -diaminodiphenyl methane is 1:1.1; the mol ratio of bisphenol A type diether dianhydride to N-methyl pyrrolidone is 1:3;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and 2,2' -dimethylolpropionic acid prepared in the step S01 under the conditions of nitrogen introduction and reflux condensation, heating to dissolve, adding 1, 3-xylyl diisocyanate and catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing to react for 4 hours; obtaining the product. Wherein the molar ratio of the polycarbonate diol, the amino-terminated polyimide, the 2,2' -dimethylolpropionic acid, the 1, 3-benzenediyl diisocyanate and the polyol is 1:0.3:1:0.8:1.7.
Wherein the polyol is 1,2, 3-hexanetriol; the polyisocyanate is 1, 3-benzenediyl diisocyanate; the coupling agent is methyltriethoxysilane; the plasticizer is dioctyl phthalate; the filler is silicon dioxide; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:4.
wherein the proportion of the amino-terminated polyimide modified polyurethane prepolymer, the polyisocyanate, the plasticizer, the coupling agent and the filler is 1:0.65:0.05:0.02:0.1:0.01.
example 4
The embodiment provides a polyurethane sealant, and the preparation raw materials of the sealant include:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Amino-terminated polyimide modified polyurethane prepolymer
Wherein: the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating to 40 ℃, stirring and dissolving, adding 4,4' -diaminodiphenyl methane, reacting for 3 hours at 120 ℃, and cooling to obtain amino-terminated polyimide; wherein, the mol ratio of bisphenol A type diether dianhydride to 4,4' -diaminodiphenyl methane is 1:1.1; the mol ratio of bisphenol A type diether dianhydride to N-methyl pyrrolidone is 1:3;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and 2,2' -dimethylolpropionic acid prepared in the step S01 under the conditions of nitrogen introduction and reflux condensation, heating to dissolve, adding 1, 3-xylyl diisocyanate and catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing to react for 4 hours; obtaining the product. Wherein the molar ratio of the polycarbonate diol, the amino-terminated polyimide, the 2,2' -dimethylolpropionic acid, the 1, 3-benzenediyl diisocyanate and the polyol is 1:0.3:1:0.8:1.7.
Wherein the polyol is 1,2, 3-hexanetriol; the polyisocyanate is 2- [ (4-isocyanatophenyl) thio ] phenylisocyanate; the coupling agent is methyltriethoxysilane; the plasticizer is dioctyl phthalate; the filler is silicon dioxide; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:2.
wherein the proportion of the amino-terminated polyimide modified polyurethane prepolymer, the polyisocyanate, the plasticizer, the coupling agent and the filler is 1:0.7:0.05:0.02:0.08:0.01.
example 5
The embodiment provides a polyurethane sealant, and the preparation raw materials of the sealant include:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Amino-terminated polyimide modified polyurethane prepolymer
Wherein: the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating to 40 ℃, stirring and dissolving, adding 4,4' -diaminodiphenyl methane, reacting for 3 hours at 120 ℃, and cooling to obtain amino-terminated polyimide; wherein, the mol ratio of bisphenol A type diether dianhydride to 4,4' -diaminodiphenyl methane is 1:1.1; the mol ratio of bisphenol A type diether dianhydride to N-methyl pyrrolidone is 1:3;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and 2,2' -dimethylolpropionic acid prepared in the step S01 under the conditions of nitrogen introduction and reflux condensation, heating to dissolve, adding 1, 3-xylyl diisocyanate and catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing to react for 4 hours; obtaining the product. Wherein the molar ratio of the polycarbonate diol, the amino-terminated polyimide, the 2,2' -dimethylolpropionic acid, the 1, 3-benzenediyl diisocyanate and the polyol is 1:0.3:1:0.8:1.1.
Wherein the polyol is propylene glycol; the polyisocyanate is 2- [ (4-isocyanatophenyl) thio ] phenylisocyanate; the coupling agent is methyltriethoxysilane; the plasticizer is dioctyl phthalate; the filler is silicon dioxide; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:4.
wherein the proportion of the amino-terminated polyimide modified polyurethane prepolymer, the polyisocyanate, the plasticizer, the coupling agent and the filler is 1:0.4:0.05:0.02:0.1:0.01.
example 6
The embodiment provides a polyurethane sealant, and the preparation raw materials of the sealant include:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Amino-terminated polyimide modified polyurethane prepolymer
Wherein: the preparation method of the amino-terminated polyimide modified polyurethane prepolymer comprises the following steps:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating to 40 ℃, stirring and dissolving, adding 4,4' -diaminodiphenyl methane, reacting for 3 hours at 120 ℃, and cooling to obtain amino-terminated polyimide; wherein, the mol ratio of bisphenol A type diether dianhydride to 4,4' -diaminodiphenyl methane is 1:1.1; the mol ratio of bisphenol A type diether dianhydride to N-methyl pyrrolidone is 1:3;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and 2,2' -dimethylolpropionic acid prepared in the step S01 under the conditions of nitrogen introduction and reflux condensation, heating to dissolve, adding toluene-2, 4-diisocyanate and catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing to react for 4 hours; obtaining the product. Wherein the molar ratio of the polycarbonate diol, the amino-terminated polyimide, the 2,2' -dimethylolpropionic acid, the 1, 3-benzenediyl diisocyanate and the polyol is 1:0.3:1:0.8:1.7.
Wherein the polyol is 1,2, 3-hexanetriol; the polyisocyanate is toluene-2, 4-diisocyanate; the coupling agent is methyltriethoxysilane; the plasticizer is dioctyl phthalate; the filler is silicon dioxide; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:4.
wherein the proportion of the amino-terminated polyimide modified polyurethane prepolymer, the polyisocyanate, the plasticizer, the coupling agent and the filler is 1:0.65:0.05:0.02:0.1:0.01.
example 7
The embodiment provides a polyurethane sealant, and the preparation raw materials of the sealant include:
and (3) a component A: a polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
Polyurethane prepolymer
Wherein: the preparation method of the polyurethane prepolymer comprises the following steps: adding heptane-1, 2, 3-triol into a four-neck flask with a thermometer, a condenser, a stirring device and a vent pipe, heating the water bath to 80 ℃ within 30min, stirring and vacuum degassing for 1h under the condition that the vacuum degree is 0.09MPa, cooling to 50 ℃, stopping stirring and vacuumizing; then adding xylylene diisocyanate and cyclohexanone, heating to 80 ℃ under the protection of high-purity nitrogen, adding a catalyst stannous octoate after melting, and refluxing for 6 hours at 90 ℃ to prepare polyurethane prepolymer; the molar ratio of the heptane-1, 2, 3-triol to the xylylene diisocyanate is 1:1
The polyisocyanate is 2- [ (4-isocyanatophenyl) thio ] phenylisocyanate; the coupling agent is methyltriethoxysilane; the plasticizer is dioctyl phthalate; the filler is silicon dioxide; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the proportion is 1:4.
wherein the proportion of the polyurethane prepolymer, the polyisocyanate, the plasticizer, the coupling agent and the filler is 1:0.4:0.05:0.02:0.1:0.01.
performance testing
1. Molecular weight distribution: GPC measurement
2. Mechanical property test: refer to GB/T528-2009.
3. Weather resistance test: and placing the cured sealant sample in an environment with 85 ℃ and 85% RH humidity for 168 hours, and testing the mechanical property change.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The double-component polyurethane sealant is characterized by comprising the following raw materials:
and (3) a component A: amino-terminated polyimide modified polyurethane prepolymer;
and the component B comprises the following components: polyisocyanate, plasticizer, coupling agent, filler and antioxidant.
2. The two-component polyurethane sealant according to claim 1, wherein the polyisocyanate is selected from one or more of p-nitrophenyl isocyanate, 1, 3-xylyl diisocyanate, 2, 4-trimethylhex-1, 6-diyl diisocyanate, naphthalene diisocyanate, 1, 3-bis (isocyanatomethyl) benzene, decane-1, 10-diisocyanate, 3 '-dichlorobenzene 4,4' -diisocyanate, 2- [ (4-isocyanatophenyl) thio ] phenyl isocyanate.
3. The two-component polyurethane sealant according to claim 1, wherein the polyisocyanate is selected from one or more of p-nitrophenyl isocyanate, 1, 3-bis (isocyanatomethyl) benzene, decane-1, 10-diisocyanate, 3 '-dichlorobenzene 4,4' -diisocyanate.
4. The two-component polyurethane sealant according to claim 1, wherein the preparation method of the amino-terminated polyimide modified polyurethane prepolymer is as follows:
s01, adding bisphenol A type diether dianhydride BPADA into N-methylpyrrolidone, heating, stirring, dissolving, adding 4,4' -diaminodiphenyl methane, reacting for a period of time, and cooling to obtain amino-terminated polyimide;
s02, adding polycarbonate diol into a reactor, adding the amino-terminated polyimide and the 2,2' -dimethylolpropionic acid prepared in the step S01, heating and dissolving, adding 1, 3-benzenediyl diisocyanate and a catalyst dibutyltin dilaurate, reacting, adding polyol, and continuing reacting for 4 hours; obtaining the product.
5. The two-part polyurethane sealant according to claim 3, wherein the polyol is selected from one or more of triethanolamine, heptane-1, 2, 3-triol, naphthalene-1, 2, 4-triol, (1 s,2s,3r,6 s) -6-amino-4-cyclohexene-1, 2, 3-triol, 5-chloro-meta-xylene-2, alpha ' -triol, 1,3, 5-cyclohexanetriol, 1,2, 3-hexanetriol, 5' -isopropylidenedi (m-xylene-2, alpha ' -triol), 1,3, 5-pentanetriol.
6. The two-component polyurethane sealant according to claim 1, wherein the plasticizer is dioctyl phthalate and/or diisodecyl phthalate.
7. The two-part polyurethane sealant according to claim 1, wherein the coupling agent comprises a silane coupling agent.
8. The two-component polyurethane sealant according to claim 1, wherein the filler is selected from one or more of silica, titanium dioxide, zinc oxide, calcium carbonate, kaolin.
9. The two-component polyurethane sealant of claim 1, wherein the filler is silica.
10. A two-component polyurethane sealant according to any one of claims 1 to 9 for use in the unmanned aerial vehicle field.
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