CN116375973A - Polyurethane film forming agent, preparation method thereof and polyurethane primer - Google Patents
Polyurethane film forming agent, preparation method thereof and polyurethane primer Download PDFInfo
- Publication number
- CN116375973A CN116375973A CN202310330393.1A CN202310330393A CN116375973A CN 116375973 A CN116375973 A CN 116375973A CN 202310330393 A CN202310330393 A CN 202310330393A CN 116375973 A CN116375973 A CN 116375973A
- Authority
- CN
- China
- Prior art keywords
- parts
- polyurethane
- primer
- film forming
- forming agent
- 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.)
- Pending
Links
- 239000004814 polyurethane Substances 0.000 title claims abstract description 55
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 55
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 34
- 229920006264 polyurethane film Polymers 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 33
- 150000004985 diamines Chemical class 0.000 claims abstract description 22
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 19
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims abstract description 17
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 14
- -1 triphenyl isocyanate Chemical class 0.000 claims abstract description 14
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 6
- NHNSSGSIAOTLKL-UHFFFAOYSA-N N=C=O.S=P(OC1=CC=CC=C1)(OC1=CC=CC=C1)OC1=CC=CC=C1 Chemical compound N=C=O.S=P(OC1=CC=CC=C1)(OC1=CC=CC=C1)OC1=CC=CC=C1 NHNSSGSIAOTLKL-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000011521 glass Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000003054 catalyst Substances 0.000 claims description 14
- 150000003384 small molecules Chemical class 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 9
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 claims description 8
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 6
- 239000003085 diluting agent Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- 229920000768 polyamine Polymers 0.000 claims description 6
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 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 3
- 230000000379 polymerizing effect Effects 0.000 claims description 3
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 125000003916 ethylene diamine group Chemical group 0.000 claims 1
- 239000012948 isocyanate Substances 0.000 abstract description 16
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 abstract description 15
- 239000003973 paint Substances 0.000 abstract description 9
- 239000000758 substrate Substances 0.000 abstract description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002987 primer (paints) Substances 0.000 description 58
- 230000001070 adhesive effect Effects 0.000 description 18
- 239000000853 adhesive Substances 0.000 description 17
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 12
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 10
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 description 9
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical group O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 239000007822 coupling agent Substances 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 5
- 239000004588 polyurethane sealant Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 125000000524 functional group Chemical group 0.000 description 4
- 150000002513 isocyanates Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 3
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 3
- 125000001261 isocyanato group Chemical group *N=C=O 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- TZZGHGKTHXIOMN-UHFFFAOYSA-N 3-trimethoxysilyl-n-(3-trimethoxysilylpropyl)propan-1-amine Chemical compound CO[Si](OC)(OC)CCCNCCC[Si](OC)(OC)OC TZZGHGKTHXIOMN-UHFFFAOYSA-N 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical group NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- ADKPKEZZYOUGBZ-UHFFFAOYSA-N [C].[O].[Si] Chemical group [C].[O].[Si] ADKPKEZZYOUGBZ-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- RJGHQTVXGKYATR-UHFFFAOYSA-L dibutyl(dichloro)stannane Chemical compound CCCC[Sn](Cl)(Cl)CCCC RJGHQTVXGKYATR-UHFFFAOYSA-L 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000003512 tertiary amines Chemical class 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
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000001951 carbamoylamino group Chemical group C(N)(=O)N* 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect 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
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- KJOMYNHMBRNCNY-UHFFFAOYSA-N pentane-1,1-diamine Chemical compound CCCCC(N)N KJOMYNHMBRNCNY-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- BPSIOYPQMFLKFR-VIFPVBQESA-N trimethoxy-[3-[[(2r)-oxiran-2-yl]methoxy]propyl]silane Chemical compound CO[Si](OC)(OC)CCCOC[C@H]1CO1 BPSIOYPQMFLKFR-VIFPVBQESA-N 0.000 description 1
Classifications
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- 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
-
- 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
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/776—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur phosphorus
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7831—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing biuret groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
Abstract
The invention provides a polyurethane film forming agent and a preparation method thereof, wherein the film forming agent is mainly prepared by polymerization reaction of the following raw materials in parts by mole: 50-80 parts of small molecular triol, 20-50 parts of diethylenetriamine, 295-305 parts of diisocyanate and 5-40 parts of diamine, wherein the sum of the mole parts of the small molecular triol and the diethylenetriamine is 100 parts. The invention also provides a polyurethane primer, which comprises the following raw materials in parts by mass: 150 parts of the polyurethane film forming agent, 20-70 parts of triphenyl phosphorothioate isocyanate solution, 30-80 parts of bonding auxiliary agent and 100-300 parts of fourth solvent. During curing, the bonding aid, the film forming agent and the isocyanate groups in the thiophosphoric triphenyl isocyanate react with each other to form a highly crosslinked continuous whole, and the combination of the bonding aid, the film forming agent and the isocyanate groups in the thiophosphoric triphenyl isocyanate enables the primer to be quickly dried and crosslinked to form a high-strength paint film, and the paint film contains a large amount of urea groups which are helpful for bonding the substrate.
Description
Technical Field
The invention relates to the technical field of primer for polyurethane adhesives, in particular to a polyurethane film forming agent, a preparation method thereof and a polyurethane primer.
Background
The polyurethane adhesive has the advantages of high strength, good elasticity and the like, and has wide application in various fields of automobiles, rail transit, electric appliances, buildings and the like. Although the polyurethane adhesive contains a large number of active functional groups, the adhesive can be well adhered to the surface of part of the base material, the polyurethane adhesive has higher tensile strength, but has poorer adhesion effect to the base materials such as glass, steel, plastic and the like, has defects in workability and needs to be matched with a primer for use.
For this reason, it is desired to improve the adhesion effect and workability of the polyurethane adhesive by developing a suitable primer. For example, chinese patent application CN 106752838A discloses a primer for polyurethane sealant, which adopts self-made silane end-capped polyurethane polymer and modified polyurethane as base materials to be matched with each other, and particularly uses polyacrylic acid polyol to introduce acrylic acid component, so that the environmental adaptability of the primer can be obviously improved; the polyurethane sealant primer has good fluidity, can rapidly form a film on the surfaces of glass, ceramic, metal and other substrates, has extremely strong adhesive property on the substrates and the polyurethane sealant, has good film forming property on isocyanate modified acrylic ester prepolymer, is favorable for rapid surface drying of the primer, has good adhesion on the substrates, and promotes the adhesion of the primer and the substrates.
However, the primer disclosed in the above patent application has low hardness after film formation, and is easily broken after film formation by external force such as vibration or collision during construction, which not only affects the yield of products, but also increases the construction period. In addition, when manufacturing vehicle windows or hollow glass in winter or in a lower temperature environment, degumming often occurs due to poor initial adhesion performance, low initial adhesion strength and other reasons of the polyurethane adhesive in the construction process, so that the problems of low product yield, high cost and the like are caused.
Disclosure of Invention
Therefore, the invention aims to solve the problems that the strength of a paint film is low after the primer is formed into a film and the paint film is easy to crack under the action of external force; therefore, the invention provides a polyurethane film forming agent with higher strength and a preparation method thereof.
The invention also aims to solve the problem that the polyurethane adhesive is easy to deglue when the polyurethane adhesive is constructed on the base materials such as glass, anodized aluminum, electrophoretic paint steel sheets and the like in winter or lower temperature environment, thereby achieving the purposes of improving the product yield and reducing the cost; therefore, the invention also provides the polyurethane primer with high strength after film formation, which is favorable for improving the low-temperature initial adhesion performance and the bonding strength of the polyurethane adhesive.
The invention achieves the aim through the following technical scheme:
the polyurethane film forming agent is mainly prepared by polymerization reaction of the following raw materials in parts by mole:
50-80 parts of small-molecule triol, 20-50 parts of diethylenetriamine, 295-305 parts of diisocyanate and 5-40 parts of diamine, wherein the sum of the mole parts of the small-molecule triol and the diethylenetriamine is 100 parts, and the small-molecule triol is trimethylolpropane, glycerol or any combination of the two.
The diisocyanate is HDI (1, 6-hexamethylene diisocyanate), IPDI (isophorone diisocyanate) or TDI (toluene diisocyanate).
The diamine is preferably ethylenediamine, 1, 2-propylenediamine, 1, 3-propylenediamine or pentylene diamine.
The preparation process of the polyurethane film forming agent includes the first polymerization reaction of small molecule ternary alcohol and diisocyanate and subsequent reaction with the mixture of diethylenetriamine and diamine. Because the reaction of hydroxyl and isocyanate groups requires higher temperature and the reaction of amino and isocyanate groups is very high, the reaction of small-molecule triol and diisocyanate is firstly carried out, so that the condition of incomplete reaction caused by the fact that the viscosity of a system is too high when the amino reacts with diisocyanate firstly to cause subsequent hydroxyl reaction is avoided.
In the nitrogen environment, the micromolecular ternary alcohol and diisocyanate are subjected to polymerization reaction, and a first solvent is added for dilution to form a first prepolymer mixed solution; then, dropwise adding polyamine diluent into the first prepolymer mixed solution for reaction, and then adding a catalyst for continuous reaction to obtain the polyurethane film forming agent; wherein the polyamine diluent is formed by uniformly mixing diethylenetriamine, diamine and a second solvent. The purpose of adding the catalyst in the step is to completely react the raw materials; the catalyst is added at last because of the high reactivity of amino groups, and if the catalyst is added in advance, the reaction is severe and is not easy to control.
Wherein the step of forming the first prepolymer mixture comprises: dehydrating micromolecular triol for 2-3 hours under the conditions of 80-90 ℃ and vacuum degree lower than-0.095 MPa, then reducing the temperature to 70-75 ℃, adding diisocyanate under the protection of nitrogen to react for 1-2 hours, adding the first solvent to dilute for 15-45 minutes, and then reducing the temperature to 20-30 ℃ to obtain the first prepolymer mixed solution.
The preparation method of the polyurethane film forming agent comprises the following steps: uniformly diluting a mixture of the triamine and the diamine with the second solvent to obtain a polyamine diluent; slowly dripping the polyamine diluent into the first prepolymer mixed solution, continuously reacting for 30-60 min after dripping, heating to 70-75 ℃, continuously reacting for 30-60 min, and continuously reacting for 1-2 h after adding the catalyst.
In order to reduce the viscosity of the reaction system to a proper value, the first solvent is preferably used in an amount of 50% -100% of the total mass of the small-molecule triol and the diisocyanate, and is one or a combination of two of ethyl acetate, butyl acetate, butanone, toluene and xylene.
In order to reduce the concentration of the mixture of the tertiary amine and the diamine and further control the reaction speed of the amino group and the isocyanate group, the second solvent is added to dilute the mixture of the tertiary amine and the diamine; preferably, the dosage of the second solvent is 100-200% of the total mass of the diamine and the triamine. The second solvent is one or two of ethyl acetate, butyl acetate, butanone, toluene and xylene.
In order to make the above system react more completely, it is preferable that the catalyst is used in an amount of 0.03 to 0.1% of the total mass of the small molecule triol and the diisocyanate. The catalyst is dibutyl tin dilaurate or dibutyl tin dichloride.
The polyurethane primer comprises the following raw materials in parts by mass: 150 parts of the polyurethane film forming agent, 20-70 parts of triphenyl thiophosphate isocyanate solution (TPTI), 30-80 parts of bonding auxiliary agent and 100-300 parts of fourth solvent.
Preferably, the polyurethane primer comprises 150 parts of polyurethane film forming agent, 30-60 parts of TPTI, 35-60 parts of bonding auxiliary agent and 100-220 parts of fourth solvent according to mass parts.
Wherein the bonding aid is a macromolecule containing isocyanate groups, silicon-oxygen carbon bonds and urea groups; such as diamine silane coupling agents, aminopropyl triethoxysilane, bis-gamma-trimethoxysilylpropyl-amine. Preferably, the bonding aid is prepared by polymerizing HDI biuret and a monoaminosilane coupling agent. Wherein the molar ratio of the HDI biuret to the monoaminosilane coupling agent is 10:23-27; in order to make the bonding auxiliary agent contain as much of the silicon-oxygen-carbon structure as possible and have some isocyanate groups, the following isocyanate groups can form a whole with the film forming agent and the TPTI; preferably, the molar ratio of HDI biuret to monoaminosilane coupling agent is 10:25-27.
Specifically, 100 parts by mass of HDI biuret and 50-100 parts by mass of a third solvent are uniformly mixed and then placed in a water bath kettle at 20-30 ℃, a monoamino silane coupling agent is dripped into the water bath kettle under the condition of nitrogen protection and stirring, stirring is continued for 20-40 min after dripping, and then the temperature is raised to 60-70 ℃ and the reaction is continued for 1.0-2.0 h, so that the bonding auxiliary agent can be prepared.
The monoaminosilane coupling agent is one or two of aminopropyl trimethoxy silane and bis (3-trimethoxysilylpropyl) amine, preferably bis (3-trimethoxysilylpropyl) amine.
The third solvent and the fourth solvent are one or two of ethyl acetate, butyl acetate, butanone, toluene and xylene.
The polyurethane primer is characterized by further comprising 3-15 parts by mass of glass beads, so that the interface area of the primer in contact with air is increased, on one hand, the solvent in the primer is volatilized and the surface dryness of the primer is increased, on the other hand, the contact area of a paint film and air is increased, the contact probability of the paint film and moisture is increased, and the low-temperature initial adhesion performance of the primer is improved; in addition, the polyurethane primer is provided with a frosted feel after film formation. Preferably, the polyurethane primer comprises 5 to 12 parts by mass of glass beads with a true density of 0.15g/cm 3 ～0.70g/cm 3 Hollow micro beads with a particle size D90 between 15 and 110 microns. Preferably glass beads manufactured by new materials, inc. of Santa Clay hollow beads, zhengzhou.
The polyurethane primer comprises 0 to 15 parts by mass of pigment. Wherein the pigment is carbon black, titanium white or iron oxide red. When no pigment is added into the polyurethane primer, the primer has lighter color after film formation and can be used in special occasions. When the pigment is added, the pigment is preferably added in an amount of 3 to 10 parts by mass.
The polyurethane primer is mainly prepared by uniformly dispersing raw materials in a fourth solvent in a nitrogen environment.
The polyurethane film forming agent is mainly a polymer which is prepared by reacting micromolecular triol, diisocyanate, diethylenetriamine and diamine and contains a certain amount of ureido, a certain amount of isocyanato and a certain amount of carbamate, and is prepared by polymerizing trimethylolpropane or glycerol and the isocyanato in the diisocyanate to form a first prepolymer molecule containing a certain amount of isocyanato and a certain amount of carbamate, and then adding a mixture of the triamine and the diamine to react so as to further chain-extend the first prepolymer molecule, thus forming the polyurethane film forming agent which has high viscosity and basically semisolid body. Because the polyurethane film forming agent basically does not contain soft segments, and all functional groups have a structure with higher strength, the polyurethane film forming agent is beneficial to improving the strength of the polyurethane primer; because the crosslinking degree is high, and the molecular weight of the triol, the triamine and the diamine is small, the prepared product contains a certain amount of carbamate groups and a certain amount of urea groups, so the self bulk viscosity is relatively large.
Therefore, the polyurethane primer provided by the invention has the following advantages:
firstly, the polyurethane primer is a molecule with extremely high functional group density and extremely high self-viscosity of a body, meanwhile, the added thiophosphoric triphenyl isocyanate body is solid and extremely high self-activity, and is a trifunctional isocyanate micromolecule, a certain amount of isocyanate groups are contained in the bonding aid, the self-viscosity is relatively high, the isocyanate groups can react with the isocyanate groups in the film forming agent and the thiophosphoric triphenyl isocyanate to form a highly crosslinked continuous whole when the polyurethane primer is solidified, and the film forming agent and the thiophosphoric triphenyl isocyanate can be quickly dried and crosslinked when the polyurethane primer is used together, so that the formed paint film has high strength, and the formed film contains a large amount of urea groups which are favorable for bonding the base material.
Secondly, the prepared bonding auxiliary agent contains a large amount of silicon-oxygen carbon structures, a large amount of urea groups and a certain amount of isocyanate groups, and the functional group density is also very high, so that the isocyanate groups can react with the isocyanate groups in the film forming agent and the thiophosphoric triphenyl isocyanate to form a high-crosslinked continuous whole during curing, a large amount of silicon-oxygen carbon bonds are introduced into the bonding auxiliary agent, the reaction between the silicon-oxygen carbon bonds and inorganic interfaces is mainly realized, the surface area of the primer in the drying process is increased by adding glass beads, the contact probability with moisture is further increased, the surface drying speed of the primer and the hydrolysis of the silicon-oxygen carbon bonds are increased, and therefore, the polyurethane primer can improve the low-temperature initial adhesion property and the bonding strength of the polyurethane adhesive to glass, stainless steel, anodic aluminum oxide and other substrates, and is favorable for improving the yield and the construction quality of products such as vehicle window manufacture and hollow glass manufacture in low-temperature environments, and low cost.
Thirdly, in the using process of the primer, the polyurethane film forming agent body has higher viscosity and basically takes a semi-solid state, so that the primer can be quickly dried on the one hand, and a continuous film body with higher strength can be formed on the other hand, so that the strength of the primer after film formation is high.
Fourth, the urea group and the carbamate group contained in the polyurethane film forming agent are favorable for bonding the base material, wherein part of the amino group formed by the reaction of the isocyanate group and water in the crosslinking process of the primer does not participate in the film forming reaction, and the primer can react with the polyurethane adhesive, so that the primer can form bonding with the polyurethane adhesive.
Detailed Description
The technical scheme of the invention is further described in detail through the following specific embodiments.
Examples 1 to 5 polyurethane film Forming Agents
The raw materials of the polyurethane film forming agents provided in examples 1 to 5 of the present invention are mainly shown in the following table 1.
TABLE 1 molar proportions of polyurethane film Forming agent raw materials
| Sample of | Trimethylolpropane | Diamine (diamine) | Diisocyanate (BI) | Diethylenetriamine |
| Example 1 | 50 | Ethylenediamine 20 | IPDI isocyanate 295 | 50 |
| Example 2 | 80 | 1, 2-propanediamine 23 | HDI isocyanate 300 | 20 |
| Example 3 | 70 | 1, 3-propanediamine 40 | TDI isocyanate 305 | 30 |
| Example 4 | 60 | Pentanediamine 10 | IPDI isocyanate 300 | 40 |
| Example 5 | 80 | Ethylenediamine 5 | IPDI isocyanate 300 | 20 |
The preparation method of the polyurethane film forming agent provided in examples 1 to 5 comprises the following steps:
dehydrating trimethylolpropane at 85 ℃ and a vacuum degree of less than-0.095 MPa for 2.5 hours, then reducing the temperature to 70 ℃, adding isocyanate shown in table 1 under the protection of nitrogen to react for 1.5 hours, adding a first solvent to dilute for 0.5 hour, and then reducing the temperature to about 25 ℃ to form a first prepolymer mixed solution; wherein the amount of the first solvent is 75% of the total mass of trimethylolpropane and the corresponding isocyanate, the first solvent used in examples 1-3 is ethyl acetate, the first solvent used in example 4 is butanone, and the first solvent used in example 5 is toluene;
uniformly diluting diamine and diethylenetriamine in table 1 with a second solvent, slowly dripping the mixture into the first prepolymer mixture, continuously reacting for about 45min after dripping, heating to 70 ℃, continuously reacting for 45min, and continuously reacting for 1.5h after adding a catalyst; wherein the dosage of the second solvent is 150% of the total mass of diamine and diethylenetriamine, the second solvent adopted in the examples 1-3 is ethyl acetate, the second solvent adopted in the example 4 is butanone, and the second solvent adopted in the example 5 is toluene; the dosage of the catalyst is 0.05% of the total mass of the trimethylolpropane and the isocyanate; the catalyst used in examples 1 to 3 was dibutyltin dilaurate and the catalyst used in example 4 was dibutyltin dichloride.
Examples 6 to 10 polyurethane primer
The polyurethane primer provided in examples 6 to 10 of the present invention was mainly obtained by uniformly dispersing the raw materials shown in table 2 in a fourth solvent in a nitrogen atmosphere.
Table 2 raw materials for bonding aid mass portion proportioning table
The raw material compositions of the bonding aids used in each example in table 2 are shown in table 3.
Table 3 main raw material table of bonding aid
The "two ratios" in Table 3 refer to the molar ratio of HDI biuret to monoaminosilane coupling agent.
The bonding aids used in examples 6 to 10 were prepared by the following method: 100 parts by mass of HDI biuret and 70 parts by mass of a third solvent are uniformly mixed and then placed in a water bath kettle at about 25 ℃, a monoaminosilane coupling agent is dripped into the water bath kettle according to the proportion shown in the table 3 under the protection of nitrogen, stirring is continued for about 25min after dripping, and then the temperature is raised to about 65 ℃ for continuous reaction for 1.5 h.
Comparative example 1
This comparative example provides a polyurethane primer which differs from the polyurethane primer provided in example 7 primarily in that: the film forming agent in this comparative example is a prepolymer of polyurethane sealant having the same solid content as the film forming agent provided in example 2, specifically, the prepolymer of polyurethane sealant is prepared by dehydrating 100 parts by mass of 5000 molecular weight trifunctional polyether polyol 330n and 50 parts by mass of 2000 molecular weight difunctional polyether polyol 2000D at 120 ℃ and a pressure lower than-0.095 MPa for 2 hours, cooling to 70 ℃, adding 40 parts by mass of MDI for 2 hours, and then adding 0.1 part by mass of dibutyltin dilaurate for further reaction for 2 hours.
Comparative example 2
This comparative example provides a polyurethane primer which differs from the polyurethane primer provided in example 7 primarily in that: the bonding aid in this comparative example was r-glycidoxypropyl trimethoxysilane of the same solids as the bonding aid provided in example 7.
Comparative example 3
This comparative example provides a polyurethane primer which differs from the polyurethane primer provided in example 9 mainly in that: the bonding aid in this comparative example was vinyltriethoxysilane having the same solids as the bonding aid provided in example 9.
Performance testing
Polyurethane primer coatings provided in examples 6 to 10 and comparative examples 1 to 3 were respectively applied to clean and dry 50mm×40mm×6mm glass and 100mm×25mm×2mm anodized aluminum surfaces to form polyurethane primer films. The surface drying time of the polyurethane primer film, the standard shear strength, the low-temperature shear strength, the shear performance and the like of the corresponding polyurethane adhesive were then tested, respectively, and the results are shown in table 4.
1) Surface drying time: the primer was applied to a 50mm by 40mm by 6mm glass surface, and the primer surface was adhered using gauze in a standard state, taking the time required for no obvious mark on the paint film surface as the tack-free time.
2) Shear test: a polyurethane adhesive (commercially available back-day 8960H) was applied to a primed 50mm x 40mm x 6mm glass surface with a 3mm thickness, a bonding area of 25mm x 12.5mm, and was adhered to a primed 100mm x 25mm x 2mm anodized aluminum surface while maintaining for 7d at standard conditions of 23 c x 50% rh and at a low temperature of-5 c, tested for shear strength, and observed for failure.
Table 4 primer performance test table
As can be seen from table 4: compared with comparative example 1, the surface drying time of the polyurethane primer provided in example 7 is significantly faster, thus demonstrating that the film forming agent provided in the example of the present invention is beneficial to faster drying time of the primer.
Compared with comparative examples 2 and 3, the polyurethane primer provided in examples 7 and 9 has a faster drying time, and the corresponding polyurethane adhesive has a relatively higher standard shear strength and a relatively higher low-temperature shear strength.
From the aspect of a shearing test on a substrate, the polyurethane primer provided by the embodiment of the invention is beneficial to enhancing the bonding strength of the polyurethane adhesive to the substrates such as glass, anodized aluminum and the like.
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; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (10)
1. A polyurethane film former, characterized in that: the catalyst is mainly prepared by polymerization of the following raw materials in parts by mole: 50-80 parts of small-molecule triol, 20-50 parts of diethylenetriamine, 295-305 parts of diisocyanate and 5-40 parts of diamine, wherein the sum of the mole parts of the small-molecule triol and the diethylenetriamine is 100 parts, and the small-molecule triol is trimethylolpropane, glycerol or any combination of the two.
2. The polyurethane film former of claim 1, wherein: the diisocyanate is HDI, IPDI or TDI.
3. The polyurethane film former according to claim 1 or 2, characterized in that: the diamine is ethylenediamine, 1, 2-propylenediamine, 1, 3-propylenediamine or pentylene diamine.
4. A process for preparing a polyurethane film former as claimed in claim 1,2 or 3 which comprises the steps of first reacting a small molecule triol with a diisocyanate and then reacting with a mixture of diethylenetriamine and said diamine.
5. The method of manufacturing according to claim 4, wherein: in a nitrogen environment, carrying out polymerization reaction on micromolecular ternary alcohol and diisocyanate, and adding a first solvent for dilution to form a first prepolymer mixed solution; then, dropwise adding polyamine diluent into the first prepolymer mixed solution for reaction, and then adding a catalyst for continuous reaction to obtain the polyurethane film forming agent; wherein the polyamine diluent is formed by uniformly mixing diethylenetriamine, diamine and a second solvent.
6. The method of manufacturing according to claim 5, wherein: the dosage of the first solvent is 50-100% of the total mass of the micromolecular triol and the diisocyanate; the dosage of the second solvent is 100-200% of the total mass of the diethylenetriamine and the diamine; the dosage of the catalyst is 0.03-0.1% of the total mass of the micromolecular triol and the diisocyanate.
7. The polyurethane primer is characterized by comprising the following raw materials in parts by mass: 150 parts of polyurethane film forming agent, 20-70 parts of triphenyl phosphorothioate isocyanate solution, 30-80 parts of bonding auxiliary agent and 100-300 parts of fourth solvent according to claim 1,2 or 3.
8. The polyurethane primer of claim 7, wherein: the bonding auxiliary agent is mainly prepared by polymerizing HDI biuret and a monoamino silane coupling agent, and the mol ratio of the HDI biuret to the monoamino silane coupling agent is 10:23-27.
9. The polyurethane primer according to claim 7 or 8, characterized in that: it also comprises 3 to 15 parts by mass of glass beads.
10. The polyurethane primer of claim 9, wherein: it also comprises 0 to 15 parts by mass of pigment.
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| CN202310330393.1A CN116375973A (en) | 2023-03-31 | 2023-03-31 | Polyurethane film forming agent, preparation method thereof and polyurethane primer |
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