CN102676039A - Moisturecured one-component polyurethane paint and preparation method thereof - Google Patents
Moisturecured one-component polyurethane paint and preparation method thereof Download PDFInfo
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- CN102676039A CN102676039A CN2012101705320A CN201210170532A CN102676039A CN 102676039 A CN102676039 A CN 102676039A CN 2012101705320 A CN2012101705320 A CN 2012101705320A CN 201210170532 A CN201210170532 A CN 201210170532A CN 102676039 A CN102676039 A CN 102676039A
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- polyurethane paint
- moisture curing
- monocomponent polyurethane
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- cyclodextrin
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 54
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 54
- 239000003973 paint Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 15
- 229920000570 polyether Polymers 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 7
- 239000011707 mineral Substances 0.000 claims abstract description 7
- 239000000178 monomer Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000013008 moisture curing Methods 0.000 claims description 35
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 24
- 238000000576 coating method Methods 0.000 claims description 24
- 229920001353 Dextrin Polymers 0.000 claims description 23
- 239000004375 Dextrin Substances 0.000 claims description 23
- 235000019425 dextrin Nutrition 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000001723 curing Methods 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 13
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 12
- 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 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000012986 modification Methods 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 10
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical group CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 10
- HEBTZZBBPUFAFE-UHFFFAOYSA-N 2-methyl-n-(oxomethylidene)benzenesulfonamide Chemical compound CC1=CC=CC=C1S(=O)(=O)N=C=O HEBTZZBBPUFAFE-UHFFFAOYSA-N 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 239000004902 Softening Agent Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 7
- 235000012211 aluminium silicate Nutrition 0.000 claims description 6
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 5
- 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 description 5
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 5
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 5
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical group CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 2
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 2
- -1 oxazole alkanes Chemical class 0.000 claims description 2
- 229920000223 polyglycerol Polymers 0.000 claims description 2
- 229920000151 polyglycol Polymers 0.000 claims description 2
- 239000010695 polyglycol Substances 0.000 claims description 2
- 229920001451 polypropylene glycol Polymers 0.000 claims description 2
- 239000011527 polyurethane coating Substances 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 238000003860 storage Methods 0.000 abstract description 9
- 239000012948 isocyanate Substances 0.000 abstract description 3
- 239000013530 defoamer Substances 0.000 abstract description 2
- 229920000858 Cyclodextrin Polymers 0.000 abstract 4
- 239000004014 plasticizer Substances 0.000 abstract 1
- 229920001228 polyisocyanate Polymers 0.000 abstract 1
- 239000005056 polyisocyanate Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000000047 product Substances 0.000 description 7
- 229910052797 bismuth Inorganic materials 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- WYNCHZVNFNFDNH-UHFFFAOYSA-N Oxazolidine Chemical compound C1COCN1 WYNCHZVNFNFDNH-UHFFFAOYSA-N 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 5
- 241001532014 Xanthorrhoea Species 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 229910000077 silane Inorganic materials 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003094 microcapsule Substances 0.000 description 3
- 238000009156 water cure Methods 0.000 description 3
- OEOIWYCWCDBOPA-UHFFFAOYSA-N 6-methyl-heptanoic acid Chemical compound CC(C)CCCCC(O)=O OEOIWYCWCDBOPA-UHFFFAOYSA-N 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The invention relates to moisturecured one-component polyurethane paint and a preparation method thereof. The polyurethane paint comprises the following raw materials in percentage by weight: 10%-20% of polyisocyanate monomer, 20%-40% of polyether polylol, 5%-15% of plasticizer, 30%-50% of modified mineral powder, 1%-5% of latent curing agent, 0.1%-2% of environment-friendly catalyst covered with cyclodextrin, 0.1%-1% of defoamer and 0.1%-1% of mono-isocyanate compound, wherein the modified mineral powder is mineral powder of which the surface is covered with a covered agent by a chemical covering method; and the environment-friendly catalyst covered with the cyclodextrin is in a nanometer cavity of the cyclodextrin, and the cyclodextrin is unmodified cyclodextrin or modified cyclodextrin or the composition of the unmodified cyclodextrin and the modified cyclodextrin. The moisturecured polyurethane paint disclosed by the invention solves the problem in storage stability of a one-component polyurethane product, and the storage life of the moisturecured polyurethane paint can exceed one year.
Description
Technical field
The present invention relates to protective coating that a kind of protective coating, particularly building field use and preparation method thereof.Specifically, the present invention relates to a kind of moisture curing monocomponent polyurethane paint and preparation method thereof.
Background technology
The moisture curing monocomponent polyurethane paint is a kind ofly to contain isocyanic ester (NCO) performed polymer of end group is suitable in wet environment, constructing, and can react with moisture, and further crosslinking curing forms snappiness, robust no seam waterproof is filmed.Contain a large amount of urea key and amino-formate bond in filming, because the effect of hydrogen bond etc., filming has good sticking power, have wear-resisting, oil resistant, acid and alkali-resistance, impact resistance, and electrical insulating property is good.The filmogen of this type of coating is by macromolecular polyvalent alcohol (like polyester polyol, polyether glycol) and vulcabond addition reaction preparation mostly.Because this coating to moisture-sensitive, is had relatively high expectations so store, want strict control moisture content in production and the wrapping process.Compare with dual-component coating, the moisture curing monocomponent polyurethane paint has saved the burden process before the construction, can not measure mistake, uses easy to operately, is the kind that has development prospect.
Yet; The moisture curing monocomponent polyurethane paint also comes with some shortcomings: 1. this coating is to carry out the deferred reaction solidified by absorbing moisture, so receive the influence of atmospheric moisture bigger, set time is longer; Add siccative and can improve the rate of drying of filming, but can reduce package stability; 2. because moisture-curable produces carbonic acid gas, can not thickly be coated with, need multiple tracks to be coated with during construction and scrape, program is loaded down with trivial details, may influence the duration; 3. the interpolation of powder can reduce cost, but can increase system viscosity, need to add diluting solvent, makes not environmental protection of product.
In recent years, in order to overcome the above-mentioned deficiency of moisture-curable, the research of single-component water cure polyurethane water-proof paint is active gradually, and this coating is solidifying agent with water, thereby more environmental protection; And water is than other solidifying agent, and cost is lower, and can also in awide temperature range, solidify.Wang Qingan etc. make water and are that the performed polymer of end group reacts with-NCO in mono-composition poyurethane water-proof paint synthetic, generate the urea key and solidify the CO of generation
2Gas can absorb through gas absorbent, forms fine and close elastomerics and films, and has synthesized the water cure polyurethane water-proof paint of better performances.Wearing Yongqing etc. also adopts in the development of polyurethane water-proof paint and uses water as solidifying agent.Yet, after ensureing curing, be coated with the stable of film dynamic performance, the strict control of addition palpus of water, moisture content is low excessively, and the curing of filming is slower, and not enough owing to the curing of coating degree of crosslinking in addition, mechanical property is also relatively poor; Along with the increase of moisture content, the corresponding raising of mechanical property, when moisture content during in a certain scope, tensile strength is maximum; When water consumption was too much, mechanical property descended again to some extent.The application of these feedwater curing urethane waterproof paints has caused many difficulties, also is the weak point of water cure polyurethane water-proof paint.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that overcomes prior art, and a kind of improved moisture curing monocomponent polyurethane paint is provided.
The present invention also will provide a kind of preparation method of moisture curing monocomponent polyurethane paint simultaneously.
For solving above technical problem, a kind of technical scheme that the present invention takes is:
A kind of moisture curing monocomponent polyurethane paint; In weight percentage; Its raw material is formed as follows: polyisocynate monomer 10% ~ 20%, polyether glycol 20% ~ 40%, softening agent 5% ~ 15%, modification breeze 30% ~ 50%, latent curing agent 1% ~ 5%, the environment-friendly type catalyzer 0.1% ~ 2% of Schardinger dextrins parcel, skimmer 0.1% ~ 1% and monoisocyanates compound 0.1% ~ 1%, and wherein: described modification breeze is for handling the mineral powder that the surface is coated with coating through chemical coating method; In the environment-friendly type catalyzer of described Schardinger dextrins parcel, the environment-friendly type catalyzer is in the lar nanometric cavities of Schardinger dextrins, and described Schardinger dextrins is unmodified Schardinger dextrins or modified cyclodextrin or the combination of the two.
According to the present invention, described polyisocynate monomer can be the common tolylene diisocyanate in market (TDI), diphenylmethanediisocyanate (MDI), isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI) etc.Wherein TDI and MDI are used for the non-product that exposes, and IPDI and HDI are used to expose product.Because TDI and HDI vp are high, high volatility, have strong impulse property smell, take all factors into consideration from the feature of environmental protection and direct labor's security of product, the present invention is MDI and IPDI more preferably, is respectively applied for the non-product that exposes and expose.
According to an aspect of the present invention, the functionality of polyether glycol is 2 ~ 3, and preferably, polyether glycol is to be selected from polyglycol ether, polypropylene glycol ether and the polyglycerol ether one or more.Preferably, the hydroxyl value of polyether glycol is between 20～200KOHmg/g, and more preferably, hydroxyl value is 20～58KOHmg/g.
According to the present invention, softening agent can be this area type commonly used.Preferably, softening agent is a propylene carbonate.Because propylene carbonate and urethane resin can form chemically bonded; Specific viscosity is lower mutually with traditional softening agent clorafin, Witcizer 300 and DOP etc.; Consistency is good; Can be along with time-shift does not go out coating, its use both can reduce system viscosity, also can improve durability of products.
Described chemical coating method is known, and it is meant the method for modification is carried out on the surface that is generally inorganic particulate by the coating material through silane coupling agent, Triple Pressed Stearic Acid etc.According to the present invention, described coating is preferably silane coupling agent.Described mineral powder includes but not limited to calcined kaolin, talcum powder, wollastonite powder and lime carbonate etc.The modification breeze is not easy to reunite, precipitate after joining polyurethane system, can not only improve the consistency with polyurethane system, also can reduce system viscosity preferably, improve levelling.
According to the present invention, described latent curing agent can adopt this area type commonly used.Preferably; Described latent curing agent is preferably oxazole alkanes solidifying agent; Rapid hydrolysis takes place under the effect of catalyzer after latent curing agent runs into water, discharges active amino, with the NCO crosslinking curing in the system; Thereby stopped the generation of dioxide gas from the source, eliminated the chemistry bubble of system.Amino in addition and isocyanate reaction generates urea, makes coating system have better physical and mechanical property, and higher bonding strength and better wear-resisting ageing-resistant performance.
According to the present invention, the environment-friendly type catalyzer of Schardinger dextrins parcel belongs to a kind of coated catalysts microcapsule.The preparation of this kind catalyst micro capsule is fairly simple, and a concrete method is: the catalyst dissolution that will coat is mixed with saturated solution (solution is that water and ethanol mix according to the volume ratio of 2:1) with the Schardinger dextrins or derivatives thereof in ethanol; Heated and stirred, temperature are controlled at 45～55 ℃, slowly join catalyzer in the saturated solution; Continuously stirring is disperseed; Vacuum filtration then 50 ℃ of vacuum-dryings, promptly gets the coated catalysts microcapsule with throw out.Utilize the lar nanometric cavities of Schardinger dextrins that catalyst pack is wrapped, reduce the reactive behavior of catalyzer, the lar nanometric cavities of Schardinger dextrins discharges catalyzer through expansion after running into steam.Compare with the catalyzer of routine, the employing of the environment-friendly type catalyzer of Schardinger dextrins parcel can make the stability of polyurethane system be greatly improved, and uses the polyurethane system storage period of this catalyzer can be above 1 year.And conventional polyurethane body series catalysts; Like dibutyl tin laurate, stannous octoate, isocaprylic acid lead and isocaprylic acid zinc etc., the isocyanic ester system had advantages of high catalytic activity, if the catalyzer addition is few; The system curing speed is slower; Increasing addition can the acceleration system solidify, but causes system viscosity to increase obviously easily, influences its stability in storage.
Preferably, the environment-friendly type catalyzer is an organo-bismuth class complex compound, and it is gentle more that it compares other environment-friendly type catalyzer to the polyurethane system catalytic activity.
According to the present invention, described skimmer is mainly used in the mechanical bubble that the elimination system produces in production and application process, and it can be this area type of anti-foam agent commonly used, but is preferably polyether-modified ZGK 5 defoamer.
According to the present invention, the monoisocyanates compound serves as water-removal additive, is preferably Methyl benzenesulfonyl isocyanate, and the isocyanate content that existence caused that overcomes water descends, and system viscosity increases and the deficiency that is unfavorable for storing.
The another technical scheme that the present invention takes is: a kind of preparation method of above-mentioned moisture curing monocomponent polyurethane paint; This preparation method implements as follows: in closed reactor; The polyether glycol, softening agent and the modification breeze that add formula ratio stir and heat up, and temperature is controlled at 100 ℃ ~ 120 ℃; The open vacuum pump is taken out negative pressure, pressure-controlling-below the 0.08MPa; Cool to then below 60 ℃, feed drying nitrogen and remove vacuum, add the polyisocynate monomer of formula ratio; Temperature is controlled at 75～85 ℃, carries out polyreaction, after polyreaction finishes; Be cooled to below 50 ℃; The environment-friendly type catalyzer and the monoisocyanates compound of the skimmer of adding formula ratio, latent curing agent, Schardinger dextrins parcel mix, and promptly get said moisture curing monocomponent polyurethane paint.
Preferably, last what prepare, coating is packed in the nitrogen protection bottom discharge.
Moisture curing monocomponent polyurethane paint provided by the invention has following characteristics:
(1) coating is designed to the single-component packing, and construction need not the field mix preparation, can brush and spray;
(2) coating forms films to concrete and metal-based layer sticking power is eager to do well in everything, snappiness good, intensity is high, wear-resisting, weather-proof, hydrolysis;
(3) can be in moist basal plane construction, the thickness of once constructing can reach 2mm and also not have bubble; Can also be deployed into various colo(u)r coatinges according to the construction needs;
(4) coating has fabulous stability in storage: the catalyzer of modification breeze in the prescription and Schardinger dextrins parcel is not reunited, and system viscosity changes little, has greatly improved the stability in storage of system;
(5) high solids content does not add any diluting solvent, and adopts the environment-friendly type catalyzer of nontoxic pollution-free, belongs to environmentally friendly machine, has widened the Application Areas of polyurethane coating.
Because the utilization of above technical scheme, the present invention compared with prior art has following advantage:
Wet cured polyurethane paint of the present invention has solved the problems of stability in storage of monocomponent polyurethane product, and the shelf lives can be above 1 year; In addition, good, the environmental protection of the Material Physics mechanical property behind the wet cured polyurethane paint film-forming of the present invention can be used in fields such as food, pharmacy, water works, also can be used as the production marketing of putting on the shelf of building materials.
Embodiment
Below in conjunction with specific embodiment the present invention is explained further details.
Embodiment 1
Present embodiment provides a kind of moisture curing monocomponent polyurethane paint and preparation method thereof.
By weight; The raw material of moisture curing monocomponent polyurethane paint consists of: 18 parts of diphenylmethanediisocyanate MI-50 (BASF AG), polyether glycol (DL-2000; Shandong Lanxing Dongda Chemical Co.,Ltd) 0.5 part in the organo-bismuth complex compound (Shanghai grass tree chemical industry ltd) that 35 parts, 10 parts of propylene carbonates, 35 parts of silane coupler modified calcined kaolins, 1 part in oxazolidine solidifying agent (FT-103, Zhangjiagang Fitow company), Schardinger dextrins coat, 0.3 part of skimmer (BYK-378) and to 0.2 part of Methyl benzenesulfonyl isocyanate (Chemical Reagent Co., Ltd., Sinopharm Group).
The preparation method of moisture curing monocomponent polyurethane paint is following:
The first step: in closed reactor, add DL-2000, propylene carbonate and silane coupler modified calcined kaolin, stir and heat up, temperature is controlled at 100～120 ℃, and the open vacuum pump is taken out negative pressure, pressure-controlling-below the 0.08MPa, vacuumize 1h;
Second step: cool to below 60 ℃, feed drying nitrogen and remove vacuum, add liquefaction diphenylmethanediisocyanate MI-50, temperature is controlled at 75～85 ℃, polyreaction 3h;
The 3rd step: cool to below 50 ℃, add the organo-bismuth complex compound of BYK-378, oxazolidine solidifying agent FT-103, Schardinger dextrins coating and, mix 30min, pack in the nitrogen protection bottom discharge to Methyl benzenesulfonyl isocyanate.
Embodiment 2
Present embodiment provides a kind of moisture curing monocomponent polyurethane paint and preparation method thereof.
By weight; The raw material of moisture curing monocomponent polyurethane paint consists of: 16 parts of diphenylmethanediisocyanate MI-50 (BASF AG), polyether glycol (DL-2000; Shandong Lanxing Dongda Chemical Co.,Ltd) 1 part in the organo-bismuth complex compound (Shanghai grass tree chemical industry ltd) that 30 parts, 10 parts of polyether glycols (EP-330N), 10 parts of propylene carbonates, 30 parts of silane coupler modified talcum powder, 2 parts in oxazolidine solidifying agent (FT-103, Zhangjiagang Fitow company), Schardinger dextrins coat, 0.3 part of skimmer (BYK-378) and to 0.5 part of Methyl benzenesulfonyl isocyanate (Chemical Reagent Co., Ltd., Sinopharm Group).
The preparation method of moisture curing monocomponent polyurethane paint is following:
The first step: in closed reactor, add DL-2000, EP-330N, propylene carbonate and silane coupler modified talcum powder, stir and heat up, temperature is controlled at 100～120 ℃, and the open vacuum pump is taken out negative pressure, pressure-controlling-below the 0.08MPa, vacuumize 1h;
Second step: cool to below 60 ℃, feed drying nitrogen and remove vacuum, add liquefaction diphenylmethanediisocyanate MI-50, temperature is controlled at 75～85 ℃, polyreaction 3h;
The 3rd step: cool to below 50 ℃, add the organo-bismuth complex compound of BYK-378, oxazolidine solidifying agent FT-103, Schardinger dextrins coating and, mix 30min, pack in the nitrogen protection bottom discharge to Methyl benzenesulfonyl isocyanate.
Embodiment 3
Present embodiment provides a kind of moisture curing monocomponent polyurethane paint, and it is through preparing with embodiment 1 identical method.By weight, the raw material of moisture curing monocomponent polyurethane paint is formed as follows:
12 parts of IPDI (Beyer Co., Ltd), polyether glycol (DL-2000; Shandong Lanxing Dongda Chemical Co.,Ltd) 1 part in the organo-bismuth complex compound (Shanghai grass tree chemical industry ltd) that 30 parts, 5 parts of polyether glycols (DL-3000), 10 parts of propylene carbonates, 40 parts of silane coupler modified talcum powder, 2 parts in oxazolidine solidifying agent (FT-103, Zhangjiagang Fitow company), Schardinger dextrins coat, 0.5 part of skimmer (BYK-378) and to 0.5 part of Methyl benzenesulfonyl isocyanate (Chemical Reagent Co., Ltd., Sinopharm Group).
Comparative Examples 1
A kind of moisture curing monocomponent polyurethane paint, it prepares through following steps:
The first step: in closed reactor; The calcined kaolin that adds DL-2000,10 parts of propylene carbonates and 35 parts of modifications of 35 parts of Shandong Lanxing Dongda Chemical Co.,Ltd; Stir and heat up, temperature is controlled at 100～120 ℃, and the open vacuum pump is taken out negative pressure; Pressure-controlling-below the 0.08MPa, vacuumize 1h;
Second step: cool to below 60 ℃, feed drying nitrogen and remove vacuum, add the liquefaction diphenylmethanediisocyanate MI-50 of 18 parts of basf companies, temperature is controlled at 75～85 ℃, polyreaction 3h;
The 3rd step: cool to below 50 ℃; Add 0.3 part of BYK-378,1.5 parts of Shanghai grass tree chemical industry ltds coating organo-bismuth and 0.2 part of Chemical Reagent Co., Ltd., Sinopharm Group to Methyl benzenesulfonyl isocyanate; Mix 30min, pack in the nitrogen protection bottom discharge.
Comparative Examples 2
A kind of moisture curing monocomponent polyurethane paint, it prepares through following steps:
The first step: in closed reactor; DL-2000,10 parts of propylene carbonates and 35 parts of calcined kaolins of adding 35 parts of Shandong Lanxing Dongda Chemical Co.,Ltd; Stir and heat up, temperature is controlled at 100～120 ℃, and the open vacuum pump is taken out negative pressure; Pressure-controlling-below the 0.08MPa, vacuumize 1h;
Second step: cool to 60 ℃, feed drying nitrogen and remove vacuum, add the liquefaction diphenylmethanediisocyanate MI-50 of 18 parts of basf companies, temperature is controlled at 75～85 ℃, polyreaction 3h;
The 3rd step: cool to below 50 ℃; Add 0.3 part of BYK-378,1.5 parts of Shanghai grass tree chemical industry ltds dibutyl tin laurate and 0.2 part of Chemical Reagent Co., Ltd., Sinopharm Group to Methyl benzenesulfonyl isocyanate; Mix 30min,, promptly get in nitrogen protection bottom discharge packing.
Each item performance index to the moisture curing monocomponent polyurethane paint of the foregoing description 1 ~ 3 and Comparative Examples 1 ~ 2 are tested, and the result is referring to table 1.
The The performance test results of table 1 moisture curing monocomponent polyurethane paint
Annotate: test is carried out under standard test condition, and one-pass film-forming thickness 2mm films.
Can find out that from table 1 moisture curing monocomponent polyurethane paint of the present invention not only tensile strength is high, elongation at break is good, and not only surface drying speed is fast, and system storage quite stable, and surpassing 12 months system viscosities increases not quite, still can be from levelling.Comparative Examples 1 does not use latent curing agent to cause the bubble of having filmed; Comparative Examples 2 causes system initial stage viscosity higher owing to use unmodified mineral filler, and precipitates easily; Use conventional organotin catalysts to cause system storage process viscosity to rise obviously, less than just occurring gelling in 6 months.
More than the present invention has been done detailed description; The explanation of embodiment just is used for helping to understand method of the present invention and core concept thereof; Its purpose is to let the personage that is familiar with this art can understand content of the present invention and implements; Can not limit protection scope of the present invention with this, all equivalences of doing according to spirit of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (10)
1. moisture curing monocomponent polyurethane paint; It is characterized in that: in weight percentage; The raw material of described polyurethane coating is formed as follows: polyisocynate monomer 10% ~ 20%, polyether glycol 20% ~ 40%, softening agent 5% ~ 15%, modification breeze 30% ~ 50%, latent curing agent 1% ~ 5%, the environment-friendly type catalyzer 0.1% ~ 2% of Schardinger dextrins parcel, skimmer 0.1% ~ 1% and monoisocyanates compound 0.1% ~ 1%, and wherein: described modification breeze is for handling the mineral powder that the surface is coated with coating through chemical coating method; In the environment-friendly type catalyzer of described Schardinger dextrins parcel, the environment-friendly type catalyzer is in the lar nanometric cavities of Schardinger dextrins, and described Schardinger dextrins is unmodified Schardinger dextrins or modified cyclodextrin or the combination of the two.
2. moisture curing monocomponent polyurethane paint according to claim 1 is characterized in that: described mineral powder is one or more the mixture that is selected from calcined kaolin, talcum powder, wollastonite powder and the lime carbonate.
3. moisture curing monocomponent polyurethane paint according to claim 1 and 2 is characterized in that: described coating is a silane coupling agent.
4. moisture curing monocomponent polyurethane paint according to claim 1 is characterized in that: described environment-friendly type catalyzer is an organo-bismuth class complex compound.
5. moisture curing monocomponent polyurethane paint according to claim 1 is characterized in that: described monoisocyanates compound is to Methyl benzenesulfonyl isocyanate.
6. according to claim 1 or 5 described moisture curing monocomponent polyurethane paints, it is characterized in that: described polyisocynate monomer is one or more the combination that is selected from tolylene diisocyanate, diphenylmethanediisocyanate, isophorone diisocyanate and the hexamethylene diisocyanate.
7. moisture curing monocomponent polyurethane paint according to claim 1 is characterized in that: described polyether glycol is one or more the combination that is selected from polyglycol ether, polypropylene glycol ether and the polyglycerol ether.
8. moisture curing monocomponent polyurethane paint according to claim 1 is characterized in that: described softening agent is a propylene carbonate.
9. moisture curing monocomponent polyurethane paint according to claim 1 is characterized in that: described latent curing agent is an oxazole alkanes solidifying agent.
10. preparation method like the described moisture curing monocomponent polyurethane paint of each claim in the claim 1 to 9; It is characterized in that: said preparation method implements as follows: in closed reactor; The polyether glycol, softening agent and the modification breeze that add formula ratio stir and heat up, and temperature is controlled at 100 ℃ ~ 120 ℃; The open vacuum pump is taken out negative pressure, pressure-controlling-below the 0.08MPa; Cool to then below 60 ℃, feed drying nitrogen and remove vacuum, add the polyisocynate monomer of formula ratio; Temperature is controlled at 75～85 ℃, carries out polyreaction, after polyreaction finishes; Be cooled to below 50 ℃; The environment-friendly type catalyzer and the monoisocyanates compound of the skimmer of adding formula ratio, latent curing agent, Schardinger dextrins parcel mix, and promptly get said moisture curing monocomponent polyurethane paint.
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