CN111647347A - Low free TDI (toluene diisocynate) single-component polyurethane waterproof paint and preparation method thereof - Google Patents
Low free TDI (toluene diisocynate) single-component polyurethane waterproof paint and preparation method thereof Download PDFInfo
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- CN111647347A CN111647347A CN202010575826.6A CN202010575826A CN111647347A CN 111647347 A CN111647347 A CN 111647347A CN 202010575826 A CN202010575826 A CN 202010575826A CN 111647347 A CN111647347 A CN 111647347A
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- reaction kettle
- temperature
- tdi
- component polyurethane
- free tdi
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 50
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 50
- 239000003973 paint Substances 0.000 title claims description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 title abstract description 27
- 238000002360 preparation method Methods 0.000 title description 15
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 34
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003054 catalyst Substances 0.000 claims abstract description 18
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 17
- 229920000570 polyether Polymers 0.000 claims abstract description 17
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 15
- 239000012948 isocyanate Substances 0.000 claims abstract description 14
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 14
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 13
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 13
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 12
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 12
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004014 plasticizer Substances 0.000 claims abstract description 11
- 229920005862 polyol Polymers 0.000 claims abstract description 11
- 150000003077 polyols Chemical class 0.000 claims abstract description 11
- 230000003449 preventive effect Effects 0.000 claims abstract description 11
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- 230000002745 absorbent Effects 0.000 claims abstract description 8
- 239000002250 absorbent Substances 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 84
- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 229920001451 polypropylene glycol Polymers 0.000 claims description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- BJUPZVQSAAGZJL-UHFFFAOYSA-N 2-methyloxirane;propane-1,2,3-triol Chemical compound CC1CO1.OCC(O)CO BJUPZVQSAAGZJL-UHFFFAOYSA-N 0.000 claims description 6
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 6
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 6
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical group OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 6
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- 150000002978 peroxides Chemical class 0.000 claims description 5
- 150000003254 radicals Chemical group 0.000 claims description 5
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 4
- VUWCWMOCWKCZTA-UHFFFAOYSA-N 1,2-thiazol-4-one Chemical class O=C1CSN=C1 VUWCWMOCWKCZTA-UHFFFAOYSA-N 0.000 claims description 3
- OEOIWYCWCDBOPA-UHFFFAOYSA-N 6-methyl-heptanoic acid Chemical compound CC(C)CCCCC(O)=O OEOIWYCWCDBOPA-UHFFFAOYSA-N 0.000 claims description 3
- 239000005711 Benzoic acid Substances 0.000 claims description 3
- ZVFDTKUVRCTHQE-UHFFFAOYSA-N Diisodecyl phthalate Chemical compound CC(C)CCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC(C)C ZVFDTKUVRCTHQE-UHFFFAOYSA-N 0.000 claims description 3
- OZTKBIHIXBXFBG-UHFFFAOYSA-N O1ONCC1.NC(=O)OCC Chemical compound O1ONCC1.NC(=O)OCC OZTKBIHIXBXFBG-UHFFFAOYSA-N 0.000 claims 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 claims description 3
- 150000004705 aldimines Chemical class 0.000 claims description 3
- 235000010233 benzoic acid Nutrition 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 3
- 150000004658 ketimines Chemical group 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 3
- 229960004889 salicylic acid Drugs 0.000 claims description 3
- WJCNZQLZVWNLKY-UHFFFAOYSA-N thiabendazole Chemical group S1C=NC(C=2NC3=CC=CC=C3N=2)=C1 WJCNZQLZVWNLKY-UHFFFAOYSA-N 0.000 claims description 3
- 229940054967 vanquish Drugs 0.000 claims description 3
- 241000276489 Merlangius merlangus Species 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
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- 238000004078 waterproofing Methods 0.000 claims 9
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- HRELNAWNYHNHHO-UHFFFAOYSA-N bis(7-methyloctyl) benzene-1,2-dicarboxylate cyclohexane Chemical compound C1CCCCC1.C(CCCCCC(C)C)OC(C=1C(C(=O)OCCCCCCC(C)C)=CC=CC1)=O HRELNAWNYHNHHO-UHFFFAOYSA-N 0.000 claims 1
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract description 18
- 239000000126 substance Substances 0.000 abstract description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 abstract description 7
- 239000008096 xylene Substances 0.000 abstract description 7
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 24
- 239000010410 layer Substances 0.000 description 14
- -1 Polyoxypropylene Polymers 0.000 description 8
- 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 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 150000002009 diols Chemical class 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 description 4
- BKUSIKGSPSFQAC-RRKCRQDMSA-N 2'-deoxyinosine-5'-diphosphate Chemical compound O1[C@H](CO[P@@](O)(=O)OP(O)(O)=O)[C@@H](O)C[C@@H]1N1C(NC=NC2=O)=C2N=C1 BKUSIKGSPSFQAC-RRKCRQDMSA-N 0.000 description 3
- 102100035474 DNA polymerase kappa Human genes 0.000 description 3
- 101710108091 DNA polymerase kappa Proteins 0.000 description 3
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 description 3
- HORIEOQXBKUKGQ-UHFFFAOYSA-N bis(7-methyloctyl) cyclohexane-1,2-dicarboxylate Chemical compound CC(C)CCCCCCOC(=O)C1CCCCC1C(=O)OCCCCCCC(C)C HORIEOQXBKUKGQ-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- BJAJDJDODCWPNS-UHFFFAOYSA-N dotp Chemical compound O=C1N2CCOC2=NC2=C1SC=C2 BJAJDJDODCWPNS-UHFFFAOYSA-N 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- QSRJVOOOWGXUDY-UHFFFAOYSA-N 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCCOCCOCCOC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 QSRJVOOOWGXUDY-UHFFFAOYSA-N 0.000 description 2
- GQBHYWDCHSZDQU-UHFFFAOYSA-N 4-(2,4,4-trimethylpentan-2-yl)-n-[4-(2,4,4-trimethylpentan-2-yl)phenyl]aniline Chemical compound C1=CC(C(C)(C)CC(C)(C)C)=CC=C1NC1=CC=C(C(C)(C)CC(C)(C)C)C=C1 GQBHYWDCHSZDQU-UHFFFAOYSA-N 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- CFRUVOJNEJOKTR-UHFFFAOYSA-N C(CCCCCCC)C=1C(=C(C(=O)O)C=CC1C(=O)O)CCCCCCCC.C(C1=CC=C(C(=O)OCCCCCCCC)C=C1)(=O)OCCCCCCCC Chemical compound C(CCCCCCC)C=1C(=C(C(=O)O)C=CC1C(=O)O)CCCCCCCC.C(C1=CC=C(C(=O)OCCCCCCCC)C=C1)(=O)OCCCCCCCC CFRUVOJNEJOKTR-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
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- 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
- 231100000331 toxic Toxicity 0.000 description 2
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- WGKLOLBTFWFKOD-UHFFFAOYSA-N tris(2-nonylphenyl) phosphite Chemical compound CCCCCCCCCC1=CC=CC=C1OP(OC=1C(=CC=CC=1)CCCCCCCCC)OC1=CC=CC=C1CCCCCCCCC WGKLOLBTFWFKOD-UHFFFAOYSA-N 0.000 description 2
- BJZYYSAMLOBSDY-QMMMGPOBSA-N (2s)-2-butoxybutan-1-ol Chemical compound CCCCO[C@@H](CC)CO BJZYYSAMLOBSDY-QMMMGPOBSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
-
- 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
-
- 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
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- 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
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- 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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Abstract
The invention relates to a low free TDI single-component polyurethane waterproof coating which is mainly prepared from the following components in parts by weight: 5.7-10.6 parts of isocyanate, 30.0-49.0 parts of polyether polyol, 8.0-12.0 parts of plasticizer, 3.0-5.0 parts of titanium dioxide, 20.0-25.0 parts of talcum powder, 5.0-10.0 parts of heavy calcium carbonate, 3.0-7.0 parts of calcined kaolin, 0.05-0.3 part of catalyst, 0.8-1.5 parts of latent curing agent, 0.05-0.15 part of stabilizer, 0.2-0.3 part of antioxidant, 0.1-0.2 part of ultraviolet absorbent and 0.2-0.4 part of mildew preventive, wherein the isocyanate comprises TDI. The polyurethane waterproof coating of the invention has excellent mechanical property and chemical resistance without detecting benzene, toluene, ethylbenzene, xylene and free TDI.
Description
Technical Field
The invention relates to a single-component polyurethane waterproof coating and a preparation method thereof, in particular to a low-free-state TDI environment-friendly single-component polyurethane waterproof coating and a preparation method thereof.
Background
The polyurethane waterproof coating has the advantages of excellent mechanical property, acid-base salt corrosion resistance, low water absorption, good water resistance, excellent workability and the like. From the 70 s in the 20 th century, the successful research and development of polyurethane waterproof coatings in China has a history of more than 50 years to date, the market share and the use amount of the polyurethane waterproof coatings are also increased year by year, and according to the statistics of 2018, the total output of the building waterproof materials is estimated to be 22.12 hundred million square meters, the percentage of the waterproof coatings is 27.78 percent, and 6.145 hundred million square meters. The polyurethane waterproof coating accounts for 30.76 percent of the total amount of the waterproof coating and is about 1.89 hundred million square meters. The waterproof coating speed increase in 2019 is expected to reach 8.6%. The polyurethane would be expected to reach 2.05 hundred million square meters.
Of course, the polyurethane waterproof coating has the disadvantage that the polyurethane waterproof coating not only contains a certain amount of benzene, toluene and xylene solvents, but also contains free TDI. In a construction site, a large amount of toluene, xylene, gasoline or ketone solvents are added for adjusting viscosity and improving the workability, so that toxic and harmful gases seriously exceed the standard, constructors are poisoned and killed or injured, and the events are frequent.
Benzene, toluene and xylene belong to medium-toxicity solvents in solvent classification, have the effects of anesthesia and stimulation on human bodies, have the toxic effect on nervous systems at high concentration, have low residual toxicity in the human bodies and can be generally eliminated by metabolism. The maximum allowable concentration in the air is 100mg/m3. People who contact toluene and xylene for a long time should not drink white spirit, and should not drink excessive high-degree white spirit, because the retention time of the alcohol in the body is prolonged, and the alcohol is extremely bad for health. The workplace should be kept air-circulating to reduce its concentration in the air.
Free TDI is mainly used for sensitization and stimulation, and has symptoms of eye pain, lacrimation, conjunctival congestion, cough, chest distress, short breath, asthma, red pimple, maculopapule and contact hypersensitivity. The international limit for free TDI is below 0.5%. When TDI reaches a certain concentration in the air of a room, people can start to feel headache, nausea and limb weakness; if left for a long time, the liver, kidneys, brain and nervous system may be injured, and even twitching, coma, and memory loss may occur, with serious consequences.
Although the development of the polyurethane waterproof coating is successful since the 70 th generation in the 19 th century, three standards are greatly adjusted, such as JC 500-1992 polyurethane waterproof coating, GB/T19250-2003 polyurethane waterproof coating and GB/T19250-2013 polyurethane waterproof coating. In the meantime, JC 1066-2008 'Limit of harmful substances in building waterproof paint' is also forcibly introduced by the nation. From the standard technical indexes, the national policy is gradually increasing and promoting the technical requirements of the limited quantity of harmful substances. The application and popularization of environment-friendly materials need to increase the support force for new technologies and new materials.
The TDI series polyurethane coating has the advantages of good coating film appearance, high hardness, good wear resistance, good anti-corrosion effect, wide construction temperature range, low cost and the like, and has become a mainstream coating for domestic and foreign industrial coating and civil coating. The research on low free TDI becomes a hotspot of research of various scientific research institutions and becomes a key technical index for controlling environment-friendly products of enterprises. The method for treating free TDI in polyurethane paint at home and abroad mainly comprises a chemical method, a common extraction method, a supercritical extraction method, a film evaporation method and the like. Although great progress is made, the existence of free TDI cannot be eliminated, and the technical index of a large-scale manufacturer of the polyurethane curing agent can be only controlled to be about 0.5 percent at present. Due to the limitation of synthesis technology, free TDI becomes a big pain point and difficulty which affect the production enterprises of polyurethane waterproof coatings.
Disclosure of Invention
The invention provides a low free TDI single-component polyurethane waterproof paint and a preparation method thereof.
The invention is realized by the following technical scheme:
one) scheme I
A low free TDI single-component polyurethane waterproof paint is mainly prepared from the following components in parts by weight:
the isocyanate comprises TDI.
The isocyanate also comprises one or two of MDI or PAPI, and the TDI and the MDI are mixed according to any proportion, or the TDI and the PAPI are mixed according to any proportion, or the TDI, the MDI and the PAPI are mixed according to any proportion. The TDI is toluene diisocyanate (tolumen diisocynate); the MDI is diphenylmethane diisocyanate (4, 4' -diphenylmethyl diisocyanate); the PAPI is polymethylene polyphenyl isocyanate (polymethylene polyphenylisocyanate).
The polyether polyol is prepared by mixing one or more of polyoxypropylene glycol, glycerol propylene oxide polyether triol and polytetrahydrofuran ether glycol according to any proportion.
Polyoxypropylene diol (polyoxypropylene glycol 1000), molecular weight 1000; polyoxypropylene diol (polyoxypropylene glycol 2000), molecular weight 2000; glycerol propylene oxide polyether triol (Glycerol propylene oxide polyether triol330N)
Polytetrahydrofuran ether glycol (Polytetrahydrofuran ether glycol)
Furthermore, the plasticizer is one or more of DINP, DOTP, DIDP and DINCH mixed according to any proportion.
DINP is diisononyl phthalate (diisononyl phthalate); DOTP is dioctyl terephthalate (dioctyl terephthalate); DIDP is diisodecyl phthalate (diisodecyl phthalate); DINCH is cyclohexane 1, 2-dicarboxylic acid Diisononyl ester (Diisononyl cyclohexane 1, 2-diformate).
Furthermore, the mesh number of the talcum powder is 800-2000 meshes.
Furthermore, the mesh number of the calcined kaolin is 1000-2000 meshes.
Further, the titanium dioxide is rutile type titanium dioxide.
Furthermore, the mesh number of the coarse whiting is 800-2000 meshes.
Further, the antioxidant mainly comprises a free radical chain blocking agent or a peroxide decomposer. The free radical chain blocking agent comprises hindered phenol (such as antioxidant 245, antioxidant 264, antioxidant 1010 and the like) and aromatic secondary amine (Irganox5057 and Naugard PS-30); examples of the peroxide decomposer include thioesters (antioxidant 1035) and phosphites (antioxidant 168, triphenyl phosphite, tris (nonylphenyl) phosphite, etc.).
Furthermore, the mildew preventive is mainly selected from 2- (4-thiazolyl) benzimidazole, isothiazolinone derivatives or Vanquish 100. Because the organic bactericides have the characteristics of low toxicity, easy dissolution in organic solvents, good compatibility and uniform dispersion.
Further, the catalyst is dibutyltin dilaurate or bismuth isooctanoate.
Further, the latent curing agent is ketimine, aldimine or urethane dioxazolidine.
Further, the stabilizer is organic weak acid: salicylic acid, oxalic acid or benzoic acid.
Scheme two)
A preparation method of low free TDI single-component polyurethane waterproof paint comprises the following steps:
adding polyether polyol, a plasticizer, an antioxidant, an ultraviolet absorbent and a mildew preventive into a reaction kettle, setting a stirring speed of 200 plus materials for 600 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium and calcined kaolin when the temperature of the reaction kettle rises to 70-80 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 115-125 ℃, continuously vacuumizing the reaction kettle for 2-5 hours under the vacuum degree of-0.095-0.1 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 45-55 ℃, adding isocyanate, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 55-65 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 65-75 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 75-85 ℃, and keeping the temperature for 1-2 hours;
then adding a catalyst at 75-85 ℃, and keeping the temperature for 1-2 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 75-85 ℃, keeping the temperature for 50-100 minutes, detecting whether the percentage content of free TDI is lower than 0.3% in the constant temperature process, opening a vacuum pump connected with the reaction kettle and continuously vacuumizing for 20-40 minutes under the vacuum degree of-0.095-0.1 MPa after the percentage content of the detected free TDI is lower than 0.3%, gradually reducing the stirring speed until the stirring is stopped, and finally standing for 5-10 minutes to obtain the catalyst.
Then discharging and packaging, and filling nitrogen into the packaging barrel for protection.
Compared with the prior art, the invention has the following beneficial effects: the polyurethane waterproof coating of the invention has excellent mechanical property and chemical resistance without detecting benzene, toluene, ethylbenzene, xylene and free TDI.
Detailed Description
The invention is further illustrated by the following specific examples.
The abbreviations and trade names of the chemical materials used in the following examples are as follows:
isocyanates
TDI toluene diisocyanate (tolumen diisocynate);
MDI diphenylmethane diisocyanate (4, 4' -diphenylmethyl diisocyanate);
PAPI polymethylene polyphenyl isocyanate (polymethylene polyisocyanate);
polyether polyols
N210 polyoxypropylene diol (polyoxypropylene glycol 1000), molecular weight 1000;
n220 polyoxypropylene diol (polyoxypropylene glycol 2000), molecular weight 2000;
330N Glycerol propylene oxide polyether triol (Glycerol propylene oxide polyether triol330N)
PTMG Polytetrahydrofuran ether glycol (Polytetrahydrofuran ether glycol)
Plasticizer
DINP (diisononyl phthalate);
DOTP dioctyl terephthalate (dioctyl terephthalate);
DIDP diisodecyl phthalate (diisodecyl phthalate);
diisononyl cyclohexane 1, 2-dicarboxylate (Diisononyl cyclohexoxane 1, 2-diformate).
800-2000 meshes of talcum powder (talcum powder)
Calcined kaolin (calcined kaolin) 1000-2000 mesh
Titanium dioxide (Titanium dioxide) rutile type Titanium dioxide
800-2000 mesh heavy Calcium carbonate
The antioxidant mainly comprises a free radical chain blocking agent and a peroxide decomposer. The free radical chain blocking agent comprises hindered phenol (such as antioxidant 245, antioxidant 264, antioxidant 1010 and the like) and aromatic secondary amine (Irganox5057 and Naugard PS-30); the peroxide decomposer is thioester (antioxidant 1035) or phosphite (antioxidant 168, triphenyl phosphite, tris (nonylphenyl) phosphite, etc.);
the mildew preventive mainly adopts an organic bactericide, and is characterized by low toxicity, easy solubility in organic solvents, good compatibility, uniform dispersion, 2- (4-thiazolyl) benzimidazole, isothiazolinone derivatives, Vanquish 100 and the like.
The catalyst is dibutyltin dilaurate or bismuth isooctanoate.
The latent curing agent is ketimine, aldimine or urethane dioxazolidine.
The stabilizer is salicylic acid, oxalic acid or benzoic acid.
Example 1
A low free TDI single-component polyurethane waterproof paint is prepared from the following components:
the preparation method of the low free TDI single-component polyurethane waterproof paint comprises the following steps:
adding polyether polyol, a plasticizer, an antioxidant, an ultraviolet absorbent and a mildew preventive into a reaction kettle, setting the stirring speed to be 200 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium and calcined kaolin when the temperature of the reaction kettle rises to 70 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 115 ℃, continuously vacuumizing the reaction kettle for 5 hours under the condition that the vacuum degree is-0.095 Mpa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 45 ℃, adding isocyanate, and keeping the temperature constant for 2 hours;
then heating the reaction kettle to 55 ℃, and keeping the temperature for 2 hours;
then heating the reaction kettle to 65 ℃ and keeping the temperature for 2 hours;
then heating the reaction kettle to 75 ℃, and keeping the temperature for 2 hours;
then adding a catalyst at 75 ℃ and keeping the temperature for 2 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 75 ℃, keeping the temperature for 100 minutes, detecting whether the percentage content of free TDI is lower than 0.3 percent in the constant temperature process, opening a vacuum pump connected with the reaction kettle and continuously vacuumizing for 40 minutes under the vacuum degree of-0.095 MPa after the percentage content of the detected free TDI is lower than 0.3 percent, then gradually reducing the stirring speed until the stirring is stopped, and finally standing for 5 minutes to obtain the catalyst.
Then discharging and packaging, and filling nitrogen into the packaging barrel for protection.
The construction process comprises the following steps:
cleaning the base surface to ensure no sharp object or protrusion.
The dust and impurities on the surface are cleaned, and the base layer is dry, solid, clean, dust-free and oil-free.
And (4) performing node reinforcement on the detailed node part, and performing detailed node reinforcement on the internal and external corners and the root part of the pipeline by using one coating and two coatings.
And (3) brushing the surface of the substrate for the first time in a large area, scraping the surface of the substrate for the second time after the surface is dried, wherein the total dry film brushing thickness of the two times is not less than 1.5 mm.
And (5) curing for 1 week after drying, performing a water-closing experiment, and performing next procedure construction on the protective layer or the isolation layer after acceptance.
Example 2
The low free TDI environmental protection type polyurethane waterproof paint is a constant temperature type single component polyurethane product
The prescription components are respectively as follows:
the preparation method of the low free TDI single-component polyurethane waterproof paint comprises the following steps:
adding polyether polyol, a plasticizer, an antioxidant, an ultraviolet absorbent and a mildew preventive into a reaction kettle, setting the stirring speed to 300 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium and calcined kaolin when the temperature of the reaction kettle rises to 80 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 125 ℃, continuously vacuumizing the reaction kettle for 2 hours under the condition that the vacuum degree is-0.1 Mpa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 55 ℃, adding isocyanate, and keeping the temperature constant for 1 hour;
then heating the reaction kettle to 65 ℃ and keeping the temperature for 1 hour;
then heating the reaction kettle to 75 ℃, and keeping the temperature for 1 hour;
then heating the reaction kettle to 85 ℃ and keeping the temperature for 1 hour;
then adding a catalyst at 85 ℃ and keeping the temperature for 1 hour;
and then, sequentially adding a latent curing agent and a stabilizing agent at 85 ℃, keeping the temperature for 50 minutes, detecting whether the percentage content of free TDI is lower than 0.3 percent in the constant temperature process, opening a vacuum pump connected with the reaction kettle and continuously vacuumizing for 20 minutes under the vacuum degree of-0.1 MPa after the percentage content of the detected free TDI is lower than 0.3 percent, gradually reducing the stirring speed until the stirring is stopped, and finally standing for 10 minutes to obtain the catalyst.
Then discharging and packaging, and filling nitrogen into the packaging barrel for protection.
The construction process comprises the following steps:
construction preparation → base layer treatment → detailed waterproof layer addition construction → large area blade coating construction → maintenance → water closing test → protection and isolation layer construction.
Example 3
The low free TDI environmental protection type polyurethane waterproof paint is a constant temperature type single component polyurethane product
The prescription components are respectively as follows:
the preparation method of the low free TDI single-component polyurethane waterproof paint comprises the following steps:
adding polyether polyol, a plasticizer, an antioxidant, an ultraviolet absorbent and a mildew preventive into a reaction kettle, setting the stirring speed to 400 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium and calcined kaolin when the temperature of the reaction kettle rises to 72 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 118 ℃, continuously vacuumizing the reaction kettle for 3 hours under the condition that the vacuum degree is-0.096 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 50 ℃, adding isocyanate, and keeping the temperature constant for 1.5 hours;
then heating the reaction kettle to 60 ℃ and keeping the temperature for 1.5 hours;
then heating the reaction kettle to 70 ℃, and keeping the temperature for 1.5 hours;
then heating the reaction kettle to 80 ℃ and keeping the temperature for 1.5 hours;
then adding a catalyst at 80 ℃ and keeping the temperature for 1.5 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 80 ℃, keeping the temperature for 60 minutes, detecting whether the percentage content of free TDI is lower than 0.3 percent in the constant temperature process, opening a vacuum pump connected with the reaction kettle and continuously vacuumizing for 30 minutes under the vacuum degree of-0.096 MPa after the percentage content of the detected free TDI is lower than 0.3 percent, then gradually reducing the stirring speed until the stirring is stopped, and finally standing for 6 minutes to obtain the catalyst.
Construction preparation → base layer treatment → detailed waterproof layer addition construction → large area blade coating construction → maintenance → water closing test → protection and isolation layer construction.
Example 4
The low free TDI environmental protection type polyurethane waterproof paint is a constant temperature type single component polyurethane product
The prescription components are respectively as follows:
the preparation method of the low free TDI single-component polyurethane waterproof paint comprises the following steps:
adding polyether polyol, a plasticizer, an antioxidant, an ultraviolet absorbent and a mildew preventive into a reaction kettle, setting a stirring speed to be 500 rpm, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium and calcined kaolin when the temperature of the reaction kettle rises to 76 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 122 ℃, continuously vacuumizing the reaction kettle for 4 hours under the vacuum degree of-0.098 Mpa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 48 ℃, adding isocyanate, and keeping the temperature constant for 1.2 hours;
then heating the reaction kettle to 58 ℃ and keeping the temperature for 1.2 hours;
then heating the reaction kettle to 68 ℃ and keeping the temperature for 1.2 hours;
then heating the reaction kettle to 78 ℃, and keeping the temperature for 1.2 hours;
then adding a catalyst at 78 ℃ and keeping the temperature for 1.2 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 78 ℃, keeping the temperature for 70 minutes, detecting whether the percentage content of free TDI is lower than 0.3 percent in the constant temperature process, opening a vacuum pump connected with the reaction kettle and continuously vacuumizing for 30 minutes under the vacuum degree of-0.095 MPa after the percentage content of the detected free TDI is lower than 0.3 percent, then gradually reducing the stirring speed until the stirring is stopped, and finally standing for 8 minutes to obtain the catalyst.
The construction process comprises the following steps:
construction preparation → base layer treatment → detailed waterproof layer addition construction → large area blade coating construction → maintenance → water closing test → protection and isolation layer construction.
Example 5
The low free TDI environmental protection type polyurethane waterproof paint is a constant temperature type single component polyurethane product
The prescription components are respectively as follows:
the preparation method of the low free TDI single-component polyurethane waterproof paint comprises the following steps:
adding polyether polyol, a plasticizer, an antioxidant, an ultraviolet absorbent and a mildew preventive into a reaction kettle, setting a stirring speed to be 500 rpm, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium and calcined kaolin when the temperature of the reaction kettle rises to 76 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 122 ℃, continuously vacuumizing the reaction kettle for 4 hours under the condition that the vacuum degree is-0.098 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 48 ℃, adding isocyanate, and keeping the temperature constant for 1.2 hours;
then heating the reaction kettle to 58 ℃ and keeping the temperature for 1.2 hours;
then heating the reaction kettle to 68 ℃ and keeping the temperature for 1.2 hours;
then heating the reaction kettle to 78 ℃, and keeping the temperature for 1.2 hours;
then adding a catalyst at 78 ℃ and keeping the temperature for 1.2 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 78 ℃, keeping the temperature for 70 minutes, detecting whether the percentage content of free TDI is lower than 0.3 percent in the constant temperature process, opening a vacuum pump connected with the reaction kettle and continuously vacuumizing for 30 minutes under the vacuum degree of-0.095 MPa after the percentage content of the detected free TDI is lower than 0.3 percent, then gradually reducing the stirring speed until the stirring is stopped, and finally standing for 8 minutes to obtain the catalyst.
The construction process comprises the following steps: construction preparation → base layer treatment → detailed waterproof layer addition construction → large area blade coating construction → maintenance → water closing test → protection and isolation layer construction.
Comparison of physical and chemical properties of different formulations
TABLE 1 comparison of physicochemical Properties of different formulations
From the experimental data in the table, it can be seen that, in terms of free TDI, the formulas can meet the technical indexes of class a of limited harmful substances in the GB/T19250-2013 standards, the limited quantity of the harmful substances is less than 10g/L, and the total amount of benzene solvents (benzene + toluene + ethylbenzene + xylene) is not detected. No free TDI was detected.
From the point of view of workability and cost analysis of construction, example 2 is the most advantageous, having lower viscosity and better workability, superior tensile properties and tear strength, and thus is selected as the best solution of the present invention.
2. Comparison with national Standard
The performance of the low-free-state environment-friendly polyurethane waterproof coating is compared with the national standard, and the table 2 shows the technical indexes of the limited quantity of harmful substances in the GB/T19250-2013 polyurethane waterproof coating standard.
TABLE 2 technical indices
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A low free TDI single-component polyurethane waterproof paint is characterized in that: the adhesive is mainly prepared from the following components in parts by weight:
the isocyanate comprises TDI.
2. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the isocyanate also comprises one or two of MDI or PAPI, and the TDI and the MDI are mixed according to any proportion, or the TDI and the PAPI are mixed according to any proportion, or the TDI, the MDI and the PAPI are mixed according to any proportion.
3. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the polyether polyol is prepared by mixing one or more of polyoxypropylene glycol, glycerol propylene oxide polyether triol and polytetrahydrofuran ether glycol in any proportion.
4. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the plasticizer is one or more of diisononyl phthalate, dioctyl terephthalate, diisodecyl phthalate or cyclohexane 1, 2-diisononyl phthalate, and is mixed according to any proportion.
5. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the mesh number of the talcum powder is 800-2000 meshes.
6. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the mesh number of the calcined kaolin is 1000-2000 meshes.
7. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the titanium dioxide is rutile type titanium dioxide.
8. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the mesh number of the coarse whiting is 800-2000 meshes.
9. The low free TDI single component polyurethane waterproofing coating according to claim 1 wherein: the antioxidant is a free radical chain blocking agent or a peroxide decomposer;
the mildew preventive is 2-4-thiazolyl benzimidazole, isothiazolinone derivatives or Vanquish 100;
the catalyst is dibutyltin dilaurate or bismuth isooctanoate;
the latent curing agent is ketimine, aldimine or urethane dioxazolidine;
the stabilizer is salicylic acid, oxalic acid or benzoic acid.
10. The process for preparing the low free TDI one-component polyurethane waterproofing coating according to any of claims 1 to 9, comprising the steps of:
adding polyether polyol, a plasticizer, an antioxidant, an ultraviolet absorbent and a mildew preventive into a reaction kettle, setting a stirring speed of 200 plus materials for 600 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium and calcined kaolin when the temperature of the reaction kettle rises to 70-80 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 115-125 ℃, continuously vacuumizing the reaction kettle for 2-5 hours under the vacuum degree of-0.095-0.1 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 45-55 ℃, adding isocyanate, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 55-65 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 65-75 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 75-85 ℃, and keeping the temperature for 1-2 hours;
then adding a catalyst at 75-85 ℃, and keeping the temperature for 1-2 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 75-85 ℃, keeping the temperature for 50-100 minutes, detecting whether the percentage content of free TDI is lower than 0.3% in the constant temperature process, opening a vacuum pump connected with the reaction kettle and continuously vacuumizing for 20-40 minutes under the vacuum degree of-0.095-0.1 MPa after the percentage content of the detected free TDI is lower than 0.3%, gradually reducing the stirring speed until the stirring is stopped, and finally standing for 5-10 minutes to obtain the catalyst.
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| CN113444440A (en) * | 2021-07-22 | 2021-09-28 | 福建省三棵树新材料有限公司 | Single-component polyurethane waterproof coating and preparation method thereof |
| CN116082948A (en) * | 2022-12-30 | 2023-05-09 | 四川省飞翎防水科技有限公司 | Production process and performance detection method of polyurethane waterproof coating |
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