CN116925629A - Polyurethane polyurea bi-component coating composition and preparation method and application thereof - Google Patents
Polyurethane polyurea bi-component coating composition and preparation method and application thereof Download PDFInfo
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- CN116925629A CN116925629A CN202210322498.8A CN202210322498A CN116925629A CN 116925629 A CN116925629 A CN 116925629A CN 202210322498 A CN202210322498 A CN 202210322498A CN 116925629 A CN116925629 A CN 116925629A
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- 239000008199 coating composition Substances 0.000 title claims abstract description 82
- 229920002396 Polyurea Polymers 0.000 title claims abstract description 52
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 38
- 239000004814 polyurethane Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000012948 isocyanate Substances 0.000 claims abstract description 79
- 229920005989 resin Polymers 0.000 claims abstract description 65
- 239000011347 resin Substances 0.000 claims abstract description 65
- 239000002904 solvent Substances 0.000 claims abstract description 59
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 52
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 49
- 229920000768 polyamine Polymers 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 32
- 229920005862 polyol Polymers 0.000 claims abstract description 29
- 150000003077 polyols Chemical class 0.000 claims abstract description 29
- 239000004611 light stabiliser Substances 0.000 claims abstract description 22
- 229940124543 ultraviolet light absorber Drugs 0.000 claims abstract description 22
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 22
- 239000002131 composite material Substances 0.000 claims abstract description 21
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 51
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 44
- -1 aliphatic isocyanate Chemical class 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 30
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 30
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 17
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 16
- 239000000178 monomer Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 15
- 239000000080 wetting agent Substances 0.000 claims description 15
- 229920000642 polymer Polymers 0.000 claims description 13
- 239000000539 dimer Substances 0.000 claims description 6
- 229920001225 polyester resin Polymers 0.000 claims description 6
- 239000004645 polyester resin Substances 0.000 claims description 6
- 239000013638 trimer Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 108010064470 polyaspartate Proteins 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- ZTNJGMFHJYGMDR-UHFFFAOYSA-N 1,2-diisocyanatoethane Chemical compound O=C=NCCN=C=O ZTNJGMFHJYGMDR-UHFFFAOYSA-N 0.000 claims description 2
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 claims description 2
- CDMDQYCEEKCBGR-UHFFFAOYSA-N 1,4-diisocyanatocyclohexane Chemical compound O=C=NC1CCC(N=C=O)CC1 CDMDQYCEEKCBGR-UHFFFAOYSA-N 0.000 claims description 2
- LFSYUSUFCBOHGU-UHFFFAOYSA-N 1-isocyanato-2-[(4-isocyanatophenyl)methyl]benzene Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=CC=C1N=C=O LFSYUSUFCBOHGU-UHFFFAOYSA-N 0.000 claims description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 2
- PMPVIKIVABFJJI-UHFFFAOYSA-N Cyclobutane Chemical compound C1CCC1 PMPVIKIVABFJJI-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- HIFVAOIJYDXIJG-UHFFFAOYSA-N benzylbenzene;isocyanic acid Chemical class N=C=O.N=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 HIFVAOIJYDXIJG-UHFFFAOYSA-N 0.000 claims description 2
- 150000002009 diols Chemical class 0.000 claims description 2
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 125000005395 methacrylic acid group Chemical group 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 229920001610 polycaprolactone Polymers 0.000 claims description 2
- 239000004632 polycaprolactone Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920005906 polyester polyol Polymers 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 125000000467 secondary amino group Chemical class [H]N([*:1])[*:2] 0.000 claims description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims 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 claims description 2
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 claims description 2
- 238000009736 wetting Methods 0.000 claims description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims 3
- 229920001228 polyisocyanate Polymers 0.000 claims 3
- 239000005056 polyisocyanate Substances 0.000 claims 3
- 125000003118 aryl group Chemical group 0.000 claims 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims 2
- LIPRQQHINVWJCH-UHFFFAOYSA-N 1-ethoxypropan-2-yl acetate Chemical compound CCOCC(C)OC(C)=O LIPRQQHINVWJCH-UHFFFAOYSA-N 0.000 claims 1
- PTTPXKJBFFKCEK-UHFFFAOYSA-N 2-Methyl-4-heptanone Chemical compound CC(C)CC(=O)CC(C)C PTTPXKJBFFKCEK-UHFFFAOYSA-N 0.000 claims 1
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 claims 1
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 claims 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims 1
- BHXIWUJLHYHGSJ-UHFFFAOYSA-N ethyl 3-ethoxypropanoate Chemical compound CCOCCC(=O)OCC BHXIWUJLHYHGSJ-UHFFFAOYSA-N 0.000 claims 1
- 125000001072 heteroaryl group Chemical group 0.000 claims 1
- 229920005749 polyurethane resin Polymers 0.000 claims 1
- 238000000518 rheometry Methods 0.000 claims 1
- 229920002050 silicone resin Polymers 0.000 claims 1
- 239000008096 xylene Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 238000007712 rapid solidification Methods 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 238000000576 coating method Methods 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 13
- 150000002148 esters Chemical class 0.000 description 10
- 229920000049 Carbon (fiber) Polymers 0.000 description 9
- 239000004917 carbon fiber Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 9
- 239000003973 paint Substances 0.000 description 9
- 239000004593 Epoxy Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 239000011527 polyurethane coating Substances 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229920000805 Polyaspartic acid Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 229920005692 JONCRYL® Polymers 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LUYHWJKHJNFYGV-UHFFFAOYSA-N 1,2-diisocyanato-3-phenylbenzene Chemical compound O=C=NC1=CC=CC(C=2C=CC=CC=2)=C1N=C=O LUYHWJKHJNFYGV-UHFFFAOYSA-N 0.000 description 1
- UZUNCLSDTUBVCN-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-6-(2-phenylpropan-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol Chemical compound C=1C(C(C)(C)CC(C)(C)C)=CC(N2N=C3C=CC=CC3=N2)=C(O)C=1C(C)(C)C1=CC=CC=C1 UZUNCLSDTUBVCN-UHFFFAOYSA-N 0.000 description 1
- SITYOOWCYAYOKL-UHFFFAOYSA-N 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(3-dodecoxy-2-hydroxypropoxy)phenol Chemical compound OC1=CC(OCC(O)COCCCCCCCCCCCC)=CC=C1C1=NC(C=2C(=CC(C)=CC=2)C)=NC(C=2C(=CC(C)=CC=2)C)=N1 SITYOOWCYAYOKL-UHFFFAOYSA-N 0.000 description 1
- SWZOQAGVRGQLDV-UHFFFAOYSA-N 4-[2-(4-hydroxy-2,2,6,6-tetramethylpiperidin-1-yl)ethoxy]-4-oxobutanoic acid Chemical compound CC1(C)CC(O)CC(C)(C)N1CCOC(=O)CCC(O)=O SWZOQAGVRGQLDV-UHFFFAOYSA-N 0.000 description 1
- RAZWNFJQEZAVOT-UHFFFAOYSA-N 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione Chemical compound O=C1N(CCCCCCCCCCCC)C(=O)NC11CC(C)(C)N(C(C)=O)C(C)(C)C1 RAZWNFJQEZAVOT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920005931 JONCRYL® 507 Polymers 0.000 description 1
- 229920000608 Polyaspartic Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- FLPKSBDJMLUTEX-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butyl-2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]propanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)C(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)(CCCC)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 FLPKSBDJMLUTEX-UHFFFAOYSA-N 0.000 description 1
- RSOILICUEWXSLA-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 RSOILICUEWXSLA-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- UJRDRFZCRQNLJM-UHFFFAOYSA-N methyl 3-[3-(benzotriazol-2-yl)-5-tert-butyl-4-hydroxyphenyl]propanoate Chemical compound CC(C)(C)C1=CC(CCC(=O)OC)=CC(N2N=C3C=CC=CC3=N2)=C1O UJRDRFZCRQNLJM-UHFFFAOYSA-N 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000012974 tin catalyst Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
Abstract
The invention relates to a polyurethane polyurea bi-component coating composition, which comprises a component A and a component B, wherein the component A comprises, by weight, 5-30 parts of polyamine resin, 40-70 parts of polyol resin, 10-35 parts of a first solvent, 0.5-3 parts of an ultraviolet light absorber, 0.5-2 parts of a light stabilizer and 0.1-3 parts of an external auxiliary agent; the component B comprises 40-85 parts of isocyanate curing agent and 15-60 parts of second solvent; the weight ratio of the component A to the component B is 1:10-10:1. The polyurethane polyurea bi-component coating composition provided by the invention has the characteristics of high solid content, low viscosity, high weather resistance and low-temperature rapid solidification, and can be applied to the surface treatment of different types of base materials such as metal, concrete, plastics, composite materials and the like. The invention also relates to a preparation method of the polyurethane polyurea bi-component coating composition and a substrate based on the coating composition.
Description
Technical Field
The invention relates to a coating, in particular to a polyurethane polyurea bi-component coating composition, a preparation method thereof and a substrate based on the coating composition.
Background
Polyurethane paint has been widely used in the fields of automobile paint, industrial paint, automobile repair paint, building paint, engineering paint, etc. with excellent weather resistance, decorative property, physical and mechanical properties, chemical resistance, etc. However, most of the current polyurethane coatings are mainly medium-solid content or low-solid content, and have relatively high VOC content (VOC >420 g/L), which is not beneficial to environmental protection. Meanwhile, in polyurethane mass analysis, catalysts, such as tin catalysts, must be added to improve the reactivity, and the catalysts catalyze the reaction of hydroxyl and isocyanate and the reaction of isocyanate and water to generate gas, so that the material performance is reduced, and tin metals are not beneficial to environmental protection. The reaction rate of polyurethane is greatly reduced without adding a catalyst, and the construction efficiency of the coating is affected.
The polyurea coating is totally different in mass analysis, and the reaction activity between the polyurea coating and the isocyanate component is extremely high by using polyamine resin as an active hydrogen component, so that the reaction can be rapidly completed under the low-temperature condition (even below 0 ℃) without any catalyst. Meanwhile, the polyurea coating can realize high solid content even 100 percent, and is environment-friendly. The polyurea coating has excellent physical and chemical properties, such as high tensile strength, high elongation, good flexibility, wear resistance, aging resistance, corrosion resistance, high thermal stability and the like, and is widely applied in different fields. However, the curing speed of the polyurea coating is too high, the operable time of the mixed polyamine resin and isocyanate component is very short, and the polyurea coating can only be constructed by a double-component device with a certain specification, thereby seriously affecting the application of the polyurea coating in construction.
In view of this, how to design a polyurethane-polyurea dual-component coating composition capable of combining the advantages and properties of polyurethane coating and polyurea coating, and realizing the characteristics of high solid content, high weather resistance, low-temperature rapid curing, etc. is a technical problem to be solved by related technicians in the industry.
Disclosure of Invention
The invention provides a polyurethane polyurea bi-component coating composition, a preparation method thereof and a substrate based on the coating composition. The coating composition has the characteristics of high solid content, low viscosity, high weather resistance and low-temperature rapid solidification, and can be applied to surface treatment of different base materials such as metal, concrete, plastic, composite materials and the like. Meanwhile, the coating composition has slower curing speed and longer operable time compared with the polyurea coating, so that the coating composition can be widely applied to the fields of general industrial coatings, automobile repair paints, waterproof coatings, engineering coatings, ceramic tile joint beautifying agents and the like.
In a first aspect of the present invention, there is provided a polyurethane polyurea two-component coating composition comprising component A and component B, wherein, in parts by weight,
the component A comprises: 5-30 parts of polyamine resin, 40-70 parts of polyol resin, 10-35 parts of first solvent, 0.5-3 parts of ultraviolet light absorber, 0.5-2 parts of light stabilizer and 0.1-3 parts of external auxiliary agent;
the component B comprises: 40-85 parts of isocyanate curing agent and 15-60 parts of second solvent;
wherein the weight ratio of the component A to the component B is 1:10-10:1.
Polyamine resins
In one embodiment of the present invention, the polyamine resin is selected from polyaspartic acid ester polyamine resins.
Further, the polyaspartic acid ester polyamine resin is a secondary amino polyamine resin containing a steric hindrance group, and the structure of the polyaspartic acid ester polyamine resin is shown as the following formula (I), formula (II) and formula (III).
Preferably, the polyaspartic ester polyamine resins include, but are not limited to, desmophen NH1220, desmophen NH1420, desmophen NH1423, and Desmophen NH1520, commercially available from Bayer materials, or F220, F420, F520, F524, and F525, commercially available from Zhuhai.
Polyol resins
In the first invention, the polyol resin contains at least one of acid resin, polyester resin, hydroxyl polyether resin and hydroxyl organic silicon resin.
Further, the hydroxyl-containing acrylic resin is polymerized from acrylic monomers, methacrylic monomers and derivatives thereof, including but not limited to, all available from all, such as Setalux 1907 BA-75, TIRES 2850, SETALUX 1774-SS-65, SETALUX 1215BA-68, SETALUX 1274 BA-70, SETALUX 91757 VX-60, SETALUX 91795 VX-60, SETALUX 61767 VX-60, etc., or Joncryl 507, joncryl 804, joncryl 910, etc.
Further, the hydroxyl-containing polyester resins include, but are not limited to, conventional saturated polyester polyols, polycaprolactone polyols, and polycarbonate diols. Preferably, the hydroxyl-containing polyester resin includes, but is not limited to, all 1612-VS-60, all 1715-VX-74, all 90173 SS-50, all 1603-BA-78, all 168 SS-80, all 82166 SS-64, etc. commercially available from Allnex, inc. or K-Flex XM-332, K-Flex 148, K-Flex XM-337, etc.
Further, the hydroxyl-containing polyether resins include, but are not limited to, bafsv commercial Sovermol 750, sovermol 805, sovermol 819, and the like.
Isocyanate curing agent
In the first invention, the isocyanate curing agent is one or more of aliphatic isocyanate, aliphatic isocyanate polymer, alicyclic isocyanate monomer, alicyclic isocyanate polymer, aromatic isocyanate monomer, aromatic isocyanate polymer, isocyanate hybrid and isocyanate hybrid polymer.
Further, the aliphatic isocyanate monomers are such as, but not limited to, one or more of tetramethylene 1, 4-diisocyanate, hexamethylene 1, 6-diisocyanate, 2, 4-trimethylhexane 1, 6-diisocyanate, ethylene diisocyanate, 1,12- "dioxane diisocyanate.
Further, the aliphatic isocyanate polymer is an aliphatic isocyanate dimer or an aliphatic isocyanate trimer.
Further, the cycloaliphatic isocyanate monomers are such as, but not limited to, one or more of iso-ketonic diisocyanate, cyclobutane 1, 3-diisocyanate, cyclohexane 1, 4-diisocyanate, methylcyclohexyl diisocyanate, 4' -methylenedicyclohexyl diisocyanate, hydrogenated diphenylmethane diisocyanate.
Further, the alicyclic isocyanate polymer is an alicyclic isocyanate dimer or an alicyclic isocyanate trimer.
Further, the aromatic isocyanate monomer is such as, but not limited to, one or more of toluene 2, 4-diisocyanate, toluene 2, 6-diisocyanate, diphenylmethane 4,4 '-diisocyanate, diphenylmethane 2,4' -diisocyanate, p-phenylene diisocyanate, biphenyl diisocyanate, 3 '-dimethyl-4, 4' -diphenylene diisocyanate, hexahydrophenylene 1, 3-diisocyanate.
Further, the aromatic isocyanate polymer is an aromatic isocyanate dimer or an aromatic isocyanate trimer.
Further, the isocyanate hybrid polymer is an isocyanate hybrid dimer or an isocyanate hybrid trimer.
Preferably, the isocyanate curing agent includes, but is not limited to, desmodur N3300, desmodur N3390, desmodur N3600, desmodur N3900, desmodur Z4470, etc. commercially available from Bayer materials, or HDT-90, HDT-100, HDT-LV, etc. commercially available from the Rodiea group, or Basonat HI 100, etc.
Solvent(s)
In one embodiment of the present invention, the first solvent and the second solvent may be the same or different, including but not limited to
Di-, iso-, acid esters, 3-acid esters, glycol acid esters glycol acid ester, 100 solvent, 150 solvent, 200 solvent.
Ultraviolet light absorber
In one aspect of the present invention, the ultraviolet light absorber comprises one or more of Tinuvin 328, tinuvin 384-2, tinuvin 900, tinuvin 928, tinuvin 1130, tinuvin 400, tinuvin 479, tinuvin 477, tinuvin CarboProtect.
Light stabilizers
In one embodiment, the light stabilizer comprises one or more of Tinuvin 144, tinuvin 123, tinuvin 292, tinuvin 440 and Tinuvin 622.
Additional auxiliary agent
In the first invention, the additional auxiliary agent in the component A is selected from one or more of a substrate wetting agent, a wetting dispersing agent, a leveling agent and a rheological auxiliary agent. It will be appreciated by those skilled in the art that the adjuvants may be selected according to the actual process requirements and that the scope of the invention is not limited to the adjuvants listed above.
In a second aspect of the present invention, there is provided a process for preparing the polyurethane polyurea two-component coating composition of the first aspect of the present invention, comprising the steps of:
(1) Preparing a component A: providing 5-30 parts of polyamine resin, 40-70 parts of polyol resin, 0.5-3 parts of ultraviolet light absorber, 0.5-2 parts of light stabilizer and 0.1-3 parts of external auxiliary agent; providing 10-35 parts of a first solvent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain a component A;
(2) Preparing a component B: providing 40-85 parts of isocyanate curing agent, providing 15-60 parts of second solvent, flushing inert gas into the second solvent, adding all components under stirring, and stirring until the components are uniformly mixed to obtain a component B;
(3) And fully mixing the component A and the component B in any weight ratio of 1:10-10:1 to obtain the polyurethane polyurea dual-component coating composition.
Wherein the polyurethane polyurea two-component coating composition has a viscosity in the range of 100 to 20000 mPas at 23 ℃, preferably in the range of 100 to 10000 mPas at 23 ℃, more preferably in the range of 100 to 5000 mPas at 23 ℃.
The present invention provides, in a first aspect, a substrate coated with the polyurethane polyurea two-component coating composition of the first aspect of the present invention, including but not limited to one or more of metal, concrete, plastic, and composite.
In one embodiment of the present invention, the coating method includes, but is not limited to, air spraying, airless spraying, in-line electrostatic spraying, in-mold coating, or the like.
The beneficial effects of the invention are that
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
the polyurethane polyurea bi-component coating composition adopts polyamine resin and polyol resin as the component A and performs curing reaction with the isocyanate curing agent of the component B, and the formed coating composition has the characteristics of good physical and mechanical properties, adhesive force, flexibility, high solid content, low-temperature rapid curing and the like. Meanwhile, the polyurethane polyurea bi-component coating composition can combine the effects of an ultraviolet light absorber and a light stabilizer, so that the coating composition has good weather resistance and has good protection effect on the surface of a substrate. In the coating composition, the solid content and the curing rate of the coating composition can be controlled by adjusting the kinds and proportions of the polyol and the polyamine resin. Meanwhile, in the polyol resin of the coating composition, the hardness and flexibility of the coating layer can be adjusted by adjusting the proportion of the hydroxy acrylic resin, the hydroxy polyester resin and/or the hydroxy polyether resin.
The coating composition has longer operability time, is equivalent to the conventional polyurethane coating composition, and greatly improves the workability of the conventional polyurea coating. The coating composition can realize the characteristic of quick curing at the low temperature of 60-90 ℃, so that the curing efficiency of the coating composition is greatly improved, and the energy is saved.
Detailed Description
Specific embodiments of the present invention are described in detail below. It will be appreciated by those skilled in the art that the present invention is not limited to the embodiments described below, and that the technical idea of the present invention may be implemented in combination with other known technologies or other technologies having the same functions as those of the known technologies.
In the following description of the specific embodiments, the structure and operation of the present invention will be described with the help of a number of directional terms, but the terms front , rear 3526, right , outer , inner , radial , etc. should be understood as terms of convenience and not as limiting terms.
The first and second are the weight. The first and second specific meaning includes a plurality of specific meaning. The invention has a great deal of contents besides the definition of the transparent tool.
It is clear that the combination of one more and one more is definite. In particular, any feature indicated as being preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.
Specific embodiments of the present invention are described in detail below.
Example 1
In this example there is provided a polyurethane polyurea two-component coating composition 1, the polyurethane polyurea two-component coating composition 1 comprising component a and component B, wherein the composition of component a and component B in parts by weight is as follows:
TABLE 1.1 composition of component A in example 1
| Component (A) | Name of the name | Parts by weight |
| Polyol resin 1 | SETALUX 1215BA-68 | 50 |
| Polyol resin 2 | SETAL 1603BA-78 | 15 |
| Polyamine resins | Desmophen NH1420 | 5 |
| First solvent 1 | Butyl acetate | 18 |
| First solvent 2 | Propylene glycol methyl ether acetate | 10 |
| Additional auxiliary 1 | Substrate wetting agent | 0.3 |
| Additional auxiliary 2 | Leveling agent | 0.2 |
| Ultraviolet light absorber | 1 | |
| Light stabilizers | 0.5 |
TABLE 1.2 composition of component B in example 1
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
The preparation method and the application of the polyurethane polyurea double-component coating composition 1 specifically comprise the following steps:
(1) Sequentially adding SETALUX 1215BA-68, SETAL 1603BA-78, desmophen NH1420, acid ester and glycol acid ester into a main container under stirring for 15-20min at 500-1500/min, mixing with an agent, an ultraviolet light absorber, a light stabilizer, and 20-30min to obtain the component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added under stirring, and stirring is carried out for 10-20min, thus obtaining the component B. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 1 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) The coating composition 1 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 9.
Example 2
In this example there is provided a polyurethane polyurea two-component coating composition 2, the polyurethane polyurea two-component coating composition 2 comprising component a and component B, wherein the composition of component a and component B, in parts by weight, is as follows:
TABLE 2.1 composition of component A in example 2
| Component (A) | Name of the name | Parts by weight |
| Polyol resin 1 | SETALUX 1215 BA-68 | 40 |
| Polyol resin 2 | SETAL 1603 BA-78 | 15 |
| Polyamine resins | Desmophen NH1420 | 15 |
| First solvent 1 | Butyl acetate | 18 |
| First solvent 2 | Propylene glycol methyl ether acetate | 10 |
| Additional auxiliary 1 | Substrate wetting agent | 0.3 |
| Additional auxiliary 2 | Leveling agent | 0.2 |
| Ultraviolet light absorber | 1 | |
| Light stabilizers | 0.5 |
TABLE 2.2 composition of component B in example 2
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
The preparation method and the application of the polyurethane polyurea bi-component coating composition 2 specifically comprise the following steps:
(1) Under stirring, sequentially adding SETALUX 1215BA-68, SETAL 1603BA-78, desmophen NH1420, butyl acetate and propylene glycol methyl ether acetate into a main container, stirring for 15-20min, controlling stirring rate at 500-1500 rpm, mixing uniformly, adding substrate wetting agent, leveling agent, ultraviolet light absorber and light stabilizer, and stirring for 20-30min to obtain component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added under stirring, and stirring is carried out for 10-20min, thus obtaining the component B. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 2 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) Coating composition 2 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 9.
Example 3
In this example there is provided a polyurethane polyurea two-component coating composition 3, the polyurethane polyurea two-component coating composition 3 comprising component a and component B, wherein the composition of component a and component B in parts by weight is as follows:
TABLE 3.1 composition of component A in example 3
| Component (A) | Name of the name | Parts by weight |
| Polyol resin 1 | SETALUX 1215 BA-68 | 40 |
| Polyol resin 2 | SETAL 1603 BA-78 | 15 |
| Polyamine resins | Desmophen NH1520 | 15 |
| First solvent 1 | Butyl acetate | 18 |
| First solvent 2 | Propylene glycol methyl ether acetate | 10 |
| Additional auxiliary 1 | Substrate wetting agent | 0.3 |
| Additional auxiliary 2 | Leveling agent | 0.2 |
| Ultraviolet light absorber | 1 | |
| Light stabilizers | 0.5 |
3.2 Composition of 3 component B
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
The preparation method and the application of the polyurethane polyurea bi-component coating composition 3 specifically comprise the following steps:
(1) Under stirring, sequentially adding SETALUX 1215BA-68, SETAL 1603BA-78, desmophen NH1520, butyl acetate and propylene glycol methyl ether acetate into a main container, stirring for 15-20min, controlling stirring rate at 500-1500 rpm, mixing uniformly, adding substrate wetting agent, leveling agent, ultraviolet light absorber and light stabilizer, and stirring for 20-30min to obtain component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added under stirring, and stirring is carried out for 10-20min, thus obtaining the component B. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 3 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) Coating composition 3 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 9.
Example 4
In this example there is provided a polyurethane polyurea two-component coating composition 4, the polyurethane polyurea two-component coating composition 3 comprising component a and component B, wherein the composition of component a and component B in parts by weight is as follows:
TABLE 4.1 composition of component A in example 4
4.2 Composition of 4 component B
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
The preparation method and the application of the polyurethane polyurea bi-component coating composition 4 specifically comprise the following steps:
(1) Under stirring, sequentially adding SETALUX 1215BA-68, SETAL 1603BA-78, desmophen NH1220, butyl acetate and propylene glycol methyl ether acetate into a main container, stirring for 15-20min at a stirring rate of 500-1500 rpm, adding a substrate wetting agent, a leveling agent, an ultraviolet light absorber and a light stabilizer, and stirring for 20-30min to obtain the component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added under stirring, and stirring is carried out for 10-20min, thus obtaining the component B. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 4 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) Coating composition 4 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 9.
Comparative example 1
In this comparative example 1, there is provided a polyurethane coating composition 5, the polyurethane coating composition 5 comprising a component a and a component B, wherein the composition of the component a and the component B is as follows in parts by weight:
TABLE 5.1 composition of component A in comparative example 1
5.2 composition of 1 component B
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
It should be noted that: in this example, the component A contains only the polyol resin and does not contain the polyamine resin, and thus is not within the scope of the present invention, so this example is comparative example 1.
The preparation method and the application of the polyurethane coating composition 5 specifically comprise the following steps:
(1) Sequentially adding SETALUX 1215BA-68, SETAL 1603BA-78, butyl acetate and propylene glycol methyl ether acetate into a main container under stirring, stirring for 15-20min at 500-1500 rpm, adding a substrate wetting agent, a leveling agent, an ultraviolet light absorber and a light stabilizer, and continuing stirring for 20-30min to obtain the component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added under stirring, and stirring is carried out for 10-20min, thus obtaining the component B. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 5 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) The coating composition 5 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 9.
Comparative example 2
In this comparative example 2 there is provided a polyurea coating composition 6, the polyurea coating composition 6 comprising a component a and a component B, wherein the composition of the component a and the component B in parts by weight is as follows:
6.1 to 2 composition of component A
| Component (A) | Name of the name | Parts by weight |
| Polyamine resins | Desmophen NH1420 | 70 |
| First solvent 1 | Butyl acetate | 18 |
| First solvent 2 | Propylene glycol methyl ether acetate | 10 |
| Additional auxiliary 1 | Substrate wetting agent | 0.3 |
| Additional auxiliary 2 | Leveling agent | 0.2 |
| Ultraviolet light absorber | 1 | |
| Light stabilizers | 0.5 |
TABLE 6.2 composition of component B in comparative example 2
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
It should be noted that: in this example, the component A contains only the polyamine resin and no polyol resin, and is therefore out of the scope of the present invention, so this example is comparative example 2.
The preparation method and the application of the polyurea coating composition 6 specifically comprise the following steps:
(1) Under stirring, desmophen NH1420, butyl acetate and propylene glycol methyl ether acetate are sequentially added into a main container, stirring is carried out for 15-20min, the stirring speed is controlled at 500-1500 rpm, after the components are uniformly mixed, a substrate wetting agent, a flatting agent, an ultraviolet light absorber and a light stabilizer are added, and stirring is continued for 20-30min, thus obtaining the component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added under stirring, and stirring is carried out for 10-20min, thus obtaining the component B. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 6 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) Coating composition 6 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 9.
Comparative example 3
This ratio 3 provides a polyurethane polyurea two-component coating composition 7, the polyurethane polyurea two-component coating composition 7 comprising component a and component B, wherein the composition of component a and component B, in parts by weight, is as follows:
TABLE 7.1 composition of component A in comparative example 3
| Component (A) | Name of the name | Parts by weight |
| Polyol resin 1 | SETALUX 1215 BA-68 | 15 |
| Polyol resin 2 | SETAL 1603 BA-78 | 15 |
| Polyamine resins | Desmophen NH1520 | 40 |
| First solvent 1 | Butyl acetate | 18 |
| First solvent 2 | Propylene glycol methyl ether acetate | 10 |
| Additional auxiliary 1 | Substrate wetting agent | 0.3 |
| Additional auxiliary 2 | Leveling agent | 0.2 |
| Ultraviolet light absorber | 1 | |
| Light stabilizers | 0.5 |
TABLE 7.2 composition of component B in comparative example 3
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
It should be noted that: in this example, the amount of the polyol resin in the component A is smaller than the polyamine resin and is therefore out of the scope of the present invention, so this example is comparative example 3.
The preparation method and the application of the polyurethane polyurea bi-component coating composition 7 specifically comprise the following steps:
(1) Under stirring, sequentially adding SETALUX 1215BA-68, SETAL 1603BA-78, desmophen NH1520, butyl acetate and propylene glycol methyl ether acetate into a main container, stirring for 15-20min, controlling stirring rate at 500-1500 rpm, mixing uniformly, adding substrate wetting agent, leveling agent, ultraviolet light absorber and light stabilizer, and stirring for 20-30min to obtain component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added for 10-20min under stirring, so that the component B is prepared. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 3 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) Coating composition 7 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 7.
Comparative example 4
In this comparative example 4 there is provided a polyurethane polyurea two-component coating composition 8, the polyurethane polyurea two-component coating composition 8 comprising component a and component B, wherein the composition of component a and component B in parts by weight is as follows:
TABLE 8.1 composition of component A in comparative example 4
| Component (A) | Name of the name | Parts by weight |
| Polyol resin 1 | SETALUX 1215 BA-68 | 5 |
| Polyol resin 2 | SETAL 1603 BA-78 | 5 |
| Polyamine resins | Desmophen NH1520 | 60 |
| First solvent 1 | Butyl acetate | 18 |
| First solvent 2 | Propylene glycol methyl ether acetate | 10 |
| Additional auxiliary 1 | Substrate wetting agent | 0.3 |
| Additional auxiliary 2 | Leveling agent | 0.2 |
| Ultraviolet light absorber | 1 | |
| Light stabilizers | 0.5 |
TABLE 8.2 composition of component B in comparative example 4
| Component (A) | Name of the name | Parts by weight |
| Isocyanate curing agent | Desmodur N 3390 | 80 |
| Second solvent 1 | Butyl acetate | 10 |
| Second solvent 2 | Propylene glycol methyl ether acetate | 10 |
It should be noted that: in this example, the amount of polyol resin in component A is still less than the polyamine resin and is therefore outside the scope of the present invention, so this example is comparative example 4.
The preparation method and the application of the polyurethane polyurea bi-component coating composition 8 specifically comprise the following steps:
(1) Under stirring, sequentially adding SETALUX 1215BA-68, SETAL 1603BA-78, desmophen NH1520, butyl acetate and propylene glycol methyl ether acetate into a main container, stirring for 15-20min, controlling stirring rate at 500-1500 rpm, mixing uniformly, adding substrate wetting agent, leveling agent, ultraviolet light absorber and light stabilizer, and stirring for 20-30min to obtain component A. The viscosity of the component A at 23 ℃ ranges from 100 to 20000 mPas.
(2) And (3) nitrogen is added into the composite solvent mixed by butyl acetate and propylene glycol methyl ether acetate, and an isocyanate curing agent Desmodur N3390 is added under stirring, and stirring is carried out for 10-20min, thus obtaining the component B. The mass percentage of the isocyanate curing agent in the component B is 60-90%.
(3) When in use, the coating composition 8 can be obtained by fully mixing the component A and the component B according to any weight ratio of 1:10-10:1.
(4) Coating composition 8 was applied to an epoxy-based carbon fiber composite substrate and cured at 80 degrees celsius for 60 minutes to perform performance testing, and the relevant results are shown in table 9.
Comparison results
The results of the performance tests obtained in the above examples and comparative examples are shown in Table 9 below.
TABLE 9 results of performance measurements of various coating compositions on carbon fiber composite templates
The results in Table 9 above show that the theoretical VOC's for the coating compositions of example 1 and example 2 are 430 and 400g/L, respectively, with degrees of separation of 2B and HB, with increased levels of exposed polyamine resins, and low coating compositions VOC's to meet environmental protection requirements of less than 420g/L, with significant increases in paint film hardness. At the same time, however, the workability time of the coating composition is reduced from 3 hours to 1 hour, which may affect the construction use to some extent. The adjustment of the type of polyamine resin in examples 2, 3 and 4 has been found to be capable of operating for up to 2 hours for example 2 and less than 30 minutes for example 4 with a guaranteed VOC.
Comparative example 1 is a polyurethane coating composition without a polyamine resin, which, although being operable for greater than 4 hours, has a slow drying rate, a theoretical VOC of up to 440g/L, and a hardness significantly lower than other samples.
Comparative example 2 is a polyurea coating composition without polyol resin, although each performance is good, the theoretical VOC is only 300g/L, but the operational time is less than 30 minutes, which seriously affects the use in construction.
The amount of polyol resin in comparative example 3 and comparative example 4 is smaller than that of the polyamine resin, and thus the operable time of the polyurea coating composition can be up to 2 hours and 3 hours, respectively, but the drying speed is slow. After baking at 80 ℃ for 1 hour, the paint film is obviously not completely dried, and the hardness is less than 6B.
From the above comparison, it can be found that example 3 can simultaneously have good physical properties and substrate pore filling properties while ensuring an operable time of up to 2 hours.
Unless otherwise indicated, the appearances of the phrase "similar to the first , second " in this document are not intended to be limiting with respect to time sequence, number, or importance, but are merely for distinguishing one technical feature from another in the present disclosure. Likewise, modifiers similar to approximately , appearing before the term herein generally include the present number, and their particular meaning should be understood in conjunction with the context.
The present invention has been described in terms of the above-described related embodiments, which are only for illustrating the technical solution of the present invention and not for limiting the present invention. Those skilled in the art should be able to obtain technical solutions by logic , reasoning or limited experiments according to the present invention, and all the technical solutions are within the scope of the present invention.
Claims (8)
1. A polyurethane polyurea two-component coating composition is characterized by comprising a component A and a component B in parts by weight,
the component A comprises: 5-30 parts of polyamine resin, 40-70 parts of polyol resin, 10-35 parts of first solvent, 0.5-3 parts of ultraviolet light absorber, 0.5-2 parts of light stabilizer and 0.1-3 parts of external auxiliary agent;
the component B comprises: 40-85 parts of isocyanate curing agent and 15-60 parts of second solvent;
wherein: the weight ratio of the component A to the component B is 1:10-10:1.
2. The coating composition of claim 1, wherein the polyamine resin is selected from the group consisting of polyaspartate polyamine resins, which are secondary amine-based polyamine resins containing sterically hindered groups.
3. The coating composition of claim 1, wherein the polyol resin is selected from one or more of a hydroxyl-containing acrylic resin, a hydroxyl-containing polyester resin, a hydroxyl-containing polyether resin, a hydroxyl-containing polyurethane resin, and a hydroxyl-containing silicone resin;
preferably, the hydroxyl-containing acrylic resin is polymerized from acrylic monomers, methacrylic monomers and derivatives thereof, and the hydroxyl-containing polyester resin is selected from one or more of saturated polyester polyols, polycaprolactone polyols and polycarbonate diols.
4. The coating composition of claim 1, wherein the isocyanate curing agent is selected from one or more of aliphatic isocyanate monomers, aliphatic isocyanate polymers, cycloaliphatic isocyanate monomers, cycloaliphatic isocyanate polymers, aromatic isocyanate monomers, aromatic isocyanate polymers, isocyanate hybrids, isocyanate hybrid polymers;
preferably, the aliphatic isocyanate monomer is selected from one or more of tetramethylene 1, 4-diisocyanate, hexamethylene 1, 6-diisocyanate, 2, 4-trimethylhexane 1, 6-diisocyanate, ethylene diisocyanate, 1,12- "dioxane diisocyanate, the aliphatic isocyanate monomer is selected from one or more of an aliphatic isocyanate dimer or an aliphatic isocyanate trimer, the aliphatic isocyanate monomer is selected from one or more of iso-methyl ketone diisocyanate, cyclobutane 1, 3-diisocyanate, cyclohexane 1, 4-diisocyanate, methylcyclohexyl diisocyanate, 4' -methylenedicyclohexyl diisocyanate, hydrogenated diphenylmethane diisocyanate, the aliphatic isocyanate polymer is an aliphatic isocyanate dimer or an aliphatic isocyanate trimer, the aromatic isocyanate monomer is selected from one or more of toluene 2, 4-diisocyanate, toluene 2, 6-diisocyanate, diphenylmethane 4,4' -diisocyanate, diphenylmethane 2,4' -diisocyanate, p-phenylene diisocyanate, 3' -diphenylmethane diisocyanate, 3' -diisocyanate, the aromatic polyisocyanate or the heteroaromatic polyisocyanate is selected from one or more of the aromatic polyisocyanates.
5. The coating composition of claim 1, wherein the first solvent of component a and the second solvent of component B are each independently selected from one or more of toluene, xylene, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, iso-butyl ketone, butyl acetate, ethyl 3-ethoxypropionate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, ethylene glycol ethyl ether acetate, no. 100 solvent oil, no. 150 solvent oil, no. 200 solvent oil.
6. The coating composition of claim 1, wherein the additional auxiliary agent in component a is selected from one or more of a substrate wetting agent, a wetting dispersant, a leveling agent, a rheology auxiliary agent.
7. A method of preparing the polyurethane-polyurea two-component coating composition of any one of claims 1-6, comprising the steps of:
(1) Preparing a component A: providing 5-30 parts of polyamine resin, 40-70 parts of polyol resin, 0.5-3 parts of ultraviolet light absorber, 0.5-2 parts of light stabilizer and 0.1-3 parts of external auxiliary agent; providing 10-35 parts of a first solvent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain a component A;
(2) Preparing a component B: providing 40-85 parts of isocyanate curing agent; providing 15-60 parts of a second solvent, flushing inert gas into the second solvent, adding an isocyanate curing agent under stirring, and stirring until the mixture is uniform to obtain the component B;
(3) Fully mixing the component A and the component B in any weight ratio of 1:10-10:1 to obtain the polyurethane polyurea bi-component coating composition;
preferably, the coating composition produced meets the following conditions: a viscosity in the range of 100 to 20000 mPa-s at 23 ℃; more preferably, the following condition is satisfied: the viscosity at 23 ℃ ranges from 100 to 10000 mPa.s; still further preferably, the following condition is satisfied: the viscosity at 23℃is in the range from 100 to 5000 mPas.
8. A substrate, characterized in that the substrate surface is coated with the polyurethane polyurea two-component coating composition of any one of claims 1-6, the substrate comprising one or more of metal, concrete, plastic, composite.
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2022
- 2022-03-30 CN CN202210322498.8A patent/CN116925629A/en active Pending
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