CN112708340A - Anti-sagging single-component polyurethane waterproof coating capable of being sprayed and constructed - Google Patents
Anti-sagging single-component polyurethane waterproof coating capable of being sprayed and constructed Download PDFInfo
- Publication number
- CN112708340A CN112708340A CN202011596382.0A CN202011596382A CN112708340A CN 112708340 A CN112708340 A CN 112708340A CN 202011596382 A CN202011596382 A CN 202011596382A CN 112708340 A CN112708340 A CN 112708340A
- Authority
- CN
- China
- Prior art keywords
- stirring
- waterproof coating
- percent
- polyurethane waterproof
- formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007665 sagging Methods 0.000 title claims abstract description 61
- 238000000576 coating method Methods 0.000 title claims abstract description 52
- 239000011248 coating agent Substances 0.000 title claims abstract description 51
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 47
- 239000004814 polyurethane Substances 0.000 title claims abstract description 47
- 229920001451 polypropylene glycol Polymers 0.000 claims abstract description 56
- -1 polyoxypropylene Polymers 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 39
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 29
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 29
- 239000004014 plasticizer Substances 0.000 claims abstract description 29
- 239000002270 dispersing agent Substances 0.000 claims abstract description 28
- 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 abstract description 24
- 239000000049 pigment Substances 0.000 claims abstract description 24
- 239000002250 absorbent Substances 0.000 claims abstract description 21
- 230000002745 absorbent Effects 0.000 claims abstract description 21
- 238000002360 preparation method Methods 0.000 claims abstract description 21
- 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 abstract description 21
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 150000002009 diols Chemical class 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 60
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 37
- 239000004952 Polyamide Substances 0.000 claims description 32
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical class O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 32
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 32
- 229920002647 polyamide Polymers 0.000 claims description 32
- 238000001816 cooling Methods 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 22
- 229910021485 fumed silica Inorganic materials 0.000 claims description 22
- 230000002209 hydrophobic effect Effects 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 22
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 20
- 239000002518 antifoaming agent Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000007795 chemical reaction product Substances 0.000 claims description 14
- 229920005862 polyol Polymers 0.000 claims description 14
- 150000003077 polyols Chemical class 0.000 claims description 14
- 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 13
- 238000007599 discharging Methods 0.000 claims description 10
- 238000009775 high-speed stirring Methods 0.000 claims description 10
- 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 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 235000019482 Palm oil Nutrition 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 150000004702 methyl esters Chemical class 0.000 claims description 4
- 239000002540 palm oil Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000004448 titration Methods 0.000 claims description 4
- 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
- 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 3
- UVDDHYAAWVNATK-VGKOASNMSA-L (z)-4-[dibutyl-[(z)-4-oxopent-2-en-2-yl]oxystannyl]oxypent-3-en-2-one Chemical compound CC(=O)\C=C(C)/O[Sn](CCCC)(CCCC)O\C(C)=C/C(C)=O UVDDHYAAWVNATK-VGKOASNMSA-L 0.000 claims 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 claims description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 2
- 229940088417 precipitated calcium carbonate Drugs 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 2
- 239000013530 defoamer Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 6
- 230000032683 aging Effects 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract 1
- 230000003000 nontoxic effect Effects 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 10
- 239000013008 thixotropic agent Substances 0.000 description 8
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000012948 isocyanate Substances 0.000 description 5
- 150000002513 isocyanates Chemical class 0.000 description 5
- 239000003973 paint Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- WUFRAKOFLITOHU-UHFFFAOYSA-N [SiH4].C(CCCCCCCCCCCCCCCCC)(=O)O Chemical compound [SiH4].C(CCCCCCCCCCCCCCCCC)(=O)O WUFRAKOFLITOHU-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019580 granularity Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- WPPDXAHGCGPUPK-UHFFFAOYSA-N red 2 Chemical compound C1=CC=CC=C1C(C1=CC=CC=C11)=C(C=2C=3C4=CC=C5C6=CC=C7C8=C(C=9C=CC=CC=9)C9=CC=CC=C9C(C=9C=CC=CC=9)=C8C8=CC=C(C6=C87)C(C=35)=CC=2)C4=C1C1=CC=CC=C1 WPPDXAHGCGPUPK-UHFFFAOYSA-N 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 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
- C09D175/04—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
-
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- 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
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a sprayable anti-sagging single-component polyurethane waterproof coating prepared by a step-by-step method, which mainly comprises 15-25% of polyoxypropylene diol, 5-15% of polyoxypropylene triol, 1.2-2.6% of toluene diisocyanate, 1.8-4.0% of diphenylmethane diisocyanate, 5-10% of plasticizer, 30-45% of filler, 1-2% of pigment, 0.2-0.4% of catalyst, 0.5-1.0% of antioxidant, 0.5-1.0% of ultraviolet absorbent, 0.2-0.4% of defoamer, 0.2-0.4% of dispersant and 5-10% of composite anti-sagging agent, wherein the polyurethane waterproof coating is polymerized by a step-by-step polymerization method in the preparation process, free TDI in the formula is removed, and the coating is environment-friendly and nontoxic, the coating has excellent anti-sagging effect, good heat resistance and aging resistance, and is a high-efficiency waterproof coating suitable for indoor waterproof construction.
Description
Technical Field
The invention relates to a sprayable anti-sagging single-component polyurethane waterproof coating for construction, and relates to the field of building waterproof coatings.
Technical Field
The single-component polyurethane waterproof coating is used as a waterproof material which is widely applied, has the characteristics of good elasticity, high strength, good adhesion, excellent tear resistance and the like, is widely applied to the field of building waterproofing, and is a waterproof material which is the most widely applied range except for waterproof coiled material series products in China at present. The single-component polyurethane waterproof coating is usually subjected to wall-erecting construction when in use, and easily flows due to low viscosity in the conventional formula design, so that a thixotropic agent is generally added when a manufacturer designs a product, the action mechanism of the thixotropic agent is that hydrogen bonds generally form a spatial network structure to improve the viscosity of the system, the network structure is damaged when being sheared from the outside to reduce the viscosity of the system, and the viscosity can be kept low when the single-component polyurethane waterproof coating is used, so that the construction is convenient, but the anti-sagging system of the thixotropic agent has two defects, the first defect is that the viscosity is continuously increased after the single-component polyurethane waterproof coating is stored for a long time due to the connection of the structures of the thixotropic agent with the hydrogen bonds, the coating is finally caked, the second defect is that the viscosity of the formula of the system is not linear along with the size of the shearing effect, the viscosity is extremely low when the hydrogen bonds are not connected into the network, in order to ensure the anti-sagging effect, the thixotropic agent is generally added in a large amount, and the viscosity is integrally high, so that the spraying construction is not facilitated.
Disclosure of Invention
The invention aims to solve the problems that the prior single-component anti-sagging polyurethane waterproof paint is difficult to spray by adopting a conventional thixotropic agent and has poor storage stability, and the matching use of powder materials with different granularities ensures that the viscosity change is more stable compared with the formula of adding the thixotropic agent, the anti-sagging polyurethane waterproof paint can ensure the anti-sagging property, simultaneously can spray and construct the paint, and simultaneously improves the storage stability,
a single-component polyurethane waterproof paint is mainly composed of 15-25% of polyoxypropylene diol, 5-15% of polyoxypropylene triol, 1.2-2.6% of toluene diisocyanate, 1.8-4.0% of diphenylmethane diisocyanate, 5-15% of plasticizer, 30-45% of filler, 1-2% of pigment, 0.2-0.4% of catalyst, 0.5-1.0% of antioxidant, 0.5-1.0% of ultraviolet absorbent, 0.2-0.4% of defoaming agent, 0.2-0.4% of dispersing agent and 5-10% of composite anti-sagging agent.
Preferably, the molecular weight of the polyoxypropylene diol component is between 1000-2000, and the molecular weight of the polyoxypropylene triol is between 3000-6000.
Preferably, the toluene diisocyanate contains a ratio of the molar amount of-NCO to the molar amount of-OH contained in the entire polyoxypropylene polyol of 0.6-0.8: 1; more preferably 0.65-0.75: 1; more preferably 0.70: 1.
Preferably, the catalyst is one or more of stannous octoate, dibutyltin dilaurate and dibutyltin bis (acetyl acetonate).
Preferably, the filler is one or a mixture of more of nano calcium carbonate, precipitated barium sulfate, heavy calcium carbonate, light calcium carbonate and talcum powder.
The plasticizer is one of diisodecyl phthalate, diisononyl phthalate and chlorinated palm oil methyl ester.
The anti-sagging composite agent is prepared from 5-15% of modified polyamide wax, 5-10% of modified bentonite, 5-10% of hydrophobic fumed silica and 70-80% of plasticizer; the preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite;
step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely;
and step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The plasticizer is one of diisodecyl phthalate, diisononyl phthalate and chlorinated palm oil methyl ester.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding polyoxypropylene polyol, a dispersing agent and a plasticizer in a formula amount into a mixer, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding toluene diisocyanate in the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and obtaining a first reaction product when the NCO content is less than or equal to 0.2%;
step two: adding the diphenylmethane diisocyanate with the formula amount into the first reaction product, adjusting the reaction temperature to 90-95 ℃, keeping the temperature for reaction for 2-2.5h, and stopping heating when the NCO% of the material is subjected to sampling titration to meet the formula design requirement, thus obtaining the polyurethane prepolymer;
step three: adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated by the reaction in the second step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a third mixture;
step four: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
The invention has the beneficial effects that: (1) the waterproof coating is prepared by mixing TDI and MDI, wherein TDI in the formula firstly reacts with excessive polyoxypropylene polyol to ensure complete reaction, then MDI is added to ensure that the TDI reacts with the excessive polyoxypropylene polyol, the free TDI in the coating is close to 0, and the viscosity of the free TDI is lower than that of a pure MDI formula; (2) the use of the composite isocyanate obviously improves the aging resistance effect of the formula; (3) the anti-sagging agent is added into the anti-sagging system in a form of independently preparing and activating the composite anti-sagging agent, compared with a single anti-sagging agent, the specific composite anti-sagging agent has a better anti-sagging effect and a smaller addition amount, and the anti-sagging agent added in the early stage can be prevented from being heated and stirred in the coating for a long time by adopting the form of adding the anti-sagging agent after the anti-sagging system is adopted, so that the using effect of the anti-sagging agent is reduced.
For a better understanding of the inventive nature of the present invention, reference is made to the following examples.
Example 1, a one-component polyurethane waterproof coating comprises the following components:
polyoxypropylene diol 20%
Polyoxypropylene triol 10%
3.2 percent of diphenylmethane diisocyanate
Diisononyl phthalate 15%
10 percent of 600-mesh heavy calcium carbonate
1250 mesh talcum powder 10%
3000-mesh modified heavy calcium carbonate 25%
1 percent of iron oxide red
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.4 percent of defoaming agent
0.4 percent of dispersant
Wherein the molecular weight of the polyoxypropylene diol is 2000, the molecular weight of the polyoxypropylene triol is 3000, the ultraviolet absorber is UV531 of basf chemistry, the antioxidant is TINUVIN-B75 of basf chemistry, the defoamer is BYK-065 of BYK chemistry, the modified heavy calcium carbonate is prepared by adding 2 parts of stearic acid silane coupling agent into 100 parts of 3000-mesh heavy calcium carbonate
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding the toluene diisocyanate according to the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and obtaining a first reaction product when the NCO content is less than or equal to 0.2%.
Step two: adding the diphenylmethane diisocyanate with the formula amount into the first reaction product, adjusting the reaction temperature to 90-95 ℃, keeping the temperature for reaction for 2-2.5h, and stopping heating when the NCO% of the material is sampled and titrated to meet the formula design requirement, thus obtaining the polyurethane prepolymer.
Step three: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated by the reaction in the second step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a third mixture.
Step four: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Embodiment 2 a single-component polyurethane waterproof coating comprises the following components:
polyoxypropylene glycol 25%
Polyoxypropylene triol 15%
3.0 percent of diphenylmethane diisocyanate
2.0 percent of toluene diisocyanate
Diisononyl phthalate 8%
20 percent of light calcium carbonate
Heavy calcium carbonate 14%
1 percent of iron oxide red
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.4 percent of defoaming agent
0.4 percent of dispersant
10 percent of compound anti-sagging agent
Wherein, the molecular weight of the polyoxypropylene diol is 2000, the molecular weight of the polyoxypropylene triol is 3000, the ultraviolet absorber is UV531 of basf chemistry, the antioxidant is TINUVIN-B75 of basf chemistry, the defoamer is BYK-065 of BYK chemistry, the dispersant is BYK-108 of BYK chemistry, and the composite anti-sagging agent comprises the following components:
15 percent of modified polyamide wax
10 percent of modified bentonite
Hydrophobic fumed silica 10%
Diisononyl phthalate 65%
Wherein the modified polyamide wax is SLX from Crayvallac, the modified bentonite is SD-2 from Hamins chemical, and the hydrophobic fumed silica is R974 from Degussa
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding the toluene diisocyanate according to the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and obtaining a first reaction product when the NCO content is less than or equal to 0.2%.
Step two: adding the diphenylmethane diisocyanate with the formula amount into the first reaction product, adjusting the reaction temperature to 90-95 ℃, keeping the temperature for reaction for 2-2.5h, and stopping heating when the NCO% of the material is sampled and titrated to meet the formula design requirement, thus obtaining the polyurethane prepolymer.
Step three: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated by the reaction in the second step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a third mixture.
Step four: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Embodiment 3 a one-component polyurethane waterproof coating comprises the following components:
polyoxypropylene glycol 25%
Polyoxypropylene triol 15%
2.8 percent of diphenylmethane diisocyanate
2.4 percent of toluene diisocyanate
Chlorinated palm oil methyl ester 8%
20 percent of light calcium carbonate
Heavy calcium carbonate 14%
Pigment carbon black 1%
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.3 percent of defoaming agent
0.3 percent of dispersant
10 percent of compound anti-sagging agent
Wherein, the molecular weight of the polyoxypropylene diol is 1000, the molecular weight of the polyoxypropylene triol is 3000, the ultraviolet absorber is UV531 of basf chemistry, the antioxidant is TINUVIN-B75 of basf chemistry, the defoamer is BYK-088 of BYK chemistry, the dispersant is BYK-108 of BYK chemistry, and the composite anti-sagging agent comprises the following components:
10 percent of modified polyamide wax
8 percent of modified bentonite
Hydrophobic fumed silica 8%
74 percent of diisononyl phthalate
Wherein the modified polyamide wax is SLX from Crayvallac, the modified bentonite is SD-2 from Hamins chemical, and the hydrophobic fumed silica is R974 from Degussa
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding the toluene diisocyanate according to the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and obtaining a first reaction product when the NCO content is less than or equal to 0.2%.
Step two: adding the diphenylmethane diisocyanate with the formula amount into the first reaction product, adjusting the reaction temperature to 90-95 ℃, keeping the temperature for reaction for 2-2.5h, and stopping heating when the NCO% of the material is sampled and titrated to meet the formula design requirement, thus obtaining the polyurethane prepolymer.
Step three: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated by the reaction in the second step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a third mixture.
Step four: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Embodiment 4 a one-component polyurethane waterproof coating comprises the following components:
polyoxypropylene glycol 25%
Polyoxypropylene triol 10%
3.2 percent of diphenylmethane diisocyanate
2.4 percent of toluene diisocyanate
Diisononyl phthalate 13%
20 percent of light calcium carbonate
Heavy calcium carbonate 14%
Iron oxide red 2%
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.4 percent of defoaming agent
0.4 percent of dispersant
10 percent of compound anti-sagging agent
Wherein, the molecular weight of the polyoxypropylene diol is 2000, the molecular weight of the polyoxypropylene triol is 6000, the ultraviolet absorber is UV531 of Basff chemistry, the antioxidant is TINUVIN-B75 of Basff chemistry, the defoamer is BYK-065 of BYK chemistry, the dispersant is BYK-108 of BYK chemistry, and the composite anti-sagging agent comprises the following components:
10 percent of modified polyamide wax
10 percent of modified bentonite
Hydrophobic fumed silica 10%
70 percent of diisononyl phthalate
Wherein the modified polyamide wax is SLX from Crayvallac, the modified bentonite is SD-2 from Hamins chemical, and the hydrophobic fumed silica is R972 from Degussa
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding the toluene diisocyanate according to the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and obtaining a first reaction product when the NCO content is less than or equal to 0.2%.
Step two: adding the diphenylmethane diisocyanate with the formula amount into the first reaction product, adjusting the reaction temperature to 90-95 ℃, keeping the temperature for reaction for 2-2.5h, and stopping heating when the NCO% of the material is sampled and titrated to meet the formula design requirement, thus obtaining the polyurethane prepolymer.
Step three: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated by the reaction in the second step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a third mixture.
Step four: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Comparative example 1, a one-component polyurethane waterproof coating, consisting of:
polyoxypropylene glycol 25%
Polyoxypropylene triol 5%
4.4 percent of toluene diisocyanate
Diisononyl phthalate 15%
25.6 percent of nano calcium carbonate
Heavy calcium carbonate 15%
1 percent of iron oxide red
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.4 percent of defoaming agent
0.4 percent of dispersant
7 percent of composite anti-sagging agent
Wherein, the molecular weight of the polyoxypropylene diol is 2000, the molecular weight of the polyoxypropylene triol is 3000, the ultraviolet absorber is UV531 of basf chemistry, the antioxidant is TINUVIN-B75 of basf chemistry, the defoamer is BYK-065 of BYK chemistry, the dispersant is BYK-108 of BYK chemistry, and the composite anti-sagging agent comprises the following components:
wherein the modified polyamide wax is SL from Crayvallac, the modified bentonite is SD-2 from Hamins chemistry, and the hydrophobic fumed silica is R972 from Degussa
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding the toluene diisocyanate according to the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and stopping heating when the NCO content reaches a theoretical value to obtain the polyurethane prepolymer.
Step two: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated in the first step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a second mixture. Step four: and (3) cooling the mixture produced in the second step to below 60 ℃, adding an antioxidant, an ultraviolet absorbent, a catalyst, a composite anti-sagging agent and a defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Comparative example 2, a one-component polyurethane waterproof coating, consisting of:
polyoxypropylene glycol 25%
Polyoxypropylene triol 5%
5.6 percent of diphenylmethane diisocyanate
Diisononyl phthalate 15%
24.4 percent of nano calcium carbonate
Heavy calcium carbonate 15%
1 percent of iron oxide red
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.4 percent of defoaming agent
0.4 percent of dispersant
7 percent of composite anti-sagging agent
Wherein, the molecular weight of the polyoxypropylene diol is 2000, the molecular weight of the polyoxypropylene triol is 3000, the ultraviolet absorber is UV531 of basf chemistry, the antioxidant is TINUVIN-B75 of basf chemistry, the defoamer is BYK-065 of BYK chemistry, the dispersant is BYK-108 of BYK chemistry, and the composite anti-sagging agent comprises the following components:
wherein the modified polyamide wax is SL from Crayvallac, the modified bentonite is SD-2 from Hamins chemistry, and the hydrophobic fumed silica is R972 from Degussa
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 85-90 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding the diphenylmethane diisocyanate according to the formula amount, reacting for 4.0h, detecting the NCO content in the formula, and stopping heating when the NCO% of the material is subjected to sampling titration to meet the formula design requirement, thus obtaining the polyurethane prepolymer.
Step two: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated in the first step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a second mixture.
Step three: and (3) cooling the mixture produced in the second step to below 60 ℃, adding an antioxidant, an ultraviolet absorbent, a catalyst, a composite anti-sagging agent and a defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Comparative example 3, a one-component polyurethane waterproof coating, consisting of:
polyoxypropylene glycol 25%
Polyoxypropylene triol 5%
3.0 percent of diphenylmethane diisocyanate
2.0 percent of toluene diisocyanate
Diisononyl phthalate 15%
25 percent of nano calcium carbonate
Heavy calcium carbonate 15%
1 percent of iron oxide red
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.4 percent of defoaming agent
0.4 percent of dispersant
7 percent of composite anti-sagging agent
Wherein, the molecular weight of the polyoxypropylene diol is 2000, the molecular weight of the polyoxypropylene triol is 3000, the ultraviolet absorber is UV531 of basf chemistry, the antioxidant is TINUVIN-B75 of basf chemistry, the defoamer is BYK-065 of BYK chemistry, the dispersant is BYK-108 of BYK chemistry, and the composite anti-sagging agent comprises the following components:
wherein the modified polyamide wax is SL from Crayvallac, the modified bentonite is SD-2 from Hamins chemistry, and the hydrophobic fumed silica is R972 from Degussa
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 85-90 ℃ when the moisture content is less than or equal to 0.005 percent, adding the toluene diisocyanate and the diphenylmethane diisocyanate according to the formula amount, reacting for 4.0h, and stopping heating when the NCO percent of the materials is subjected to sampling titration to meet the formula design requirement, thus obtaining the polyurethane prepolymer.
Step two: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated in the first step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a second mixture.
Step three: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Comparative example 4, a one-component polyurethane waterproof coating, consisting of:
polyoxypropylene glycol 25%
Polyoxypropylene triol 5%
3.8 percent of diphenylmethane diisocyanate
1.0 percent of toluene diisocyanate
Diisononyl phthalate 15%
25.2 percent of nano calcium carbonate
Heavy calcium carbonate 15%
1 percent of iron oxide red
0.2 percent of stannous octoate
0.5 percent of ultraviolet absorbent
0.5 percent of antioxidant
0.4 percent of defoaming agent
0.4 percent of dispersant
7 percent of composite anti-sagging agent
Wherein, the molecular weight of the polyoxypropylene diol is 2000, the molecular weight of the polyoxypropylene triol is 3000, the ultraviolet absorber is UV531 of basf chemistry, the antioxidant is TINUVIN-B75 of basf chemistry, the defoamer is BYK-065 of BYK chemistry, the dispersant is BYK-108 of BYK chemistry, and the composite anti-sagging agent comprises the following components:
wherein the modified polyamide wax is SL from Crayvallac, the modified bentonite is SD-2 from Hamins chemistry, and the hydrophobic fumed silica is R972 from Degussa
The preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite.
Step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely.
And step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
The preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding the polyoxypropylene polyol, the dispersing agent and the plasticizer into a mixer according to the formula amount, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding the toluene diisocyanate according to the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and obtaining a first reaction product when the NCO content is less than or equal to 0.2%.
Step two: adding the diphenylmethane diisocyanate with the formula amount into the first reaction product, adjusting the reaction temperature to 90-95 ℃, keeping the temperature for reaction for 2-2.5h, and stopping heating when the NCO% of the material is sampled and titrated to meet the formula design requirement, thus obtaining the polyurethane prepolymer.
Step three: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated by the reaction in the second step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a third mixture.
Step four: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
The results of the tests of examples 1 to 4 and comparative examples 1 to 3 are as follows
Table 1 test results of examples
As can be seen from the above table, the difference between example 1 and comparative example 1 is that a thixotropic agent system is adopted for anti-sagging design, and after the comparative example 1 is stored, the formula is designed according to the same isocyanate index as that of comparative example 2, but the isocyanate types are all changed into diphenylmethane diisocyanate, the free TDI in the formula is not detected because the TDI is not used as the raw material, but the heat aging effect of the MDI type prepolymer is poor, and the aging performance of the formula cannot meet the requirement. The same raw material proportion design is adopted in the embodiment 1 and the comparative example 3, but the isocyanate is added at one time, the free TDI content of the formula is still far greater than the condition of distributed addition, the requirement of environmental protection regulations can not be met, the same isocyanate index design formula is adopted in the embodiment 1 and the comparative example 4, and the prepolymer proportion is as follows: powder proportion: the proportion of the plasticizer is basically the same, but the content of-NCO in the toluene diisocyanate exceeds 80 percent of that of-OH in the system, and partial TDI residue still appears and does not meet the requirement of national environmental protection regulations.
The polyurethane waterproof coating prepared by the invention has excellent anti-sagging effect, can realize spraying construction, and is a high-performance green product suitable for indoor household waterproof application.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A single-component polyurethane waterproof coating comprises the following components: 15-25% of polypropylene oxide dihydric alcohol, 5-15% of polypropylene oxide trihydric alcohol, 1.2-2.6% of toluene diisocyanate, 1.8-4.0% of diphenylmethane diisocyanate, 5-15% of plasticizer, 30-45% of filler, 1-2% of pigment, 0.2-0.4% of catalyst, 0.5-1.0% of antioxidant, 0.5-1.0% of ultraviolet absorbent, 0.2-0.4% of defoaming agent, 0.2-0.4% of dispersing agent and 5-10% of composite anti-sagging agent.
2. The one-component polyurethane waterproof coating material of claim 1, wherein: the molecular weight of the polyoxypropylene diol component is between 1000-2000, and the molecular weight of the polyoxypropylene triol is between 3000-6000.
3. The one-component polyurethane waterproof coating material of claim 1, wherein: the ratio of the molar amount of-NCO contained in the toluene diisocyanate to the molar amount of-OH contained in the whole polyoxypropylene polyol is 0.6-0.8: 1.
4. The one-component polyurethane waterproof coating material of claim 1, wherein: the catalyst is one or more of stannous octoate, dibutyltin dilaurate and dibutyltin bis (acetyl acetonate);
the filler is one or a mixture of more of nano calcium carbonate, precipitated barium sulfate, heavy calcium carbonate, light calcium carbonate and talcum powder;
the plasticizer is one of diisodecyl phthalate, diisononyl phthalate and chlorinated palm oil methyl ester.
5. The one-component polyurethane waterproof coating as claimed in claim 1, wherein the composite anti-sagging agent is prepared from 5-15% of modified polyamide wax, 5-10% of modified bentonite, 5-10% of hydrophobic fumed silica and 70-80% of plasticizer; the preparation method comprises the following steps:
step 1: adding the plasticizer with the formula ratio into a reaction kettle, heating to 100-105 ℃, adding the modified bentonite, and stirring for 10min to uniformly disperse the modified bentonite;
step 2: cooling to 80-90 deg.C, adding modified polyamide wax, maintaining the temperature at 80-90 deg.C, stirring at constant speed for 30min to disperse and activate polyamide wax completely;
and step 3: adding hydrophobic fumed silica, starting high-speed stirring and cooling, and discharging when the temperature is reduced to below 60 ℃ to obtain the composite anti-sagging agent.
6. The one-component polyurethane waterproof coating material of claim 1, which is characterized in that: the preparation method of the polyurethane waterproof coating comprises the following steps:
the method comprises the following steps: adding polyoxypropylene polyol, a dispersing agent and a plasticizer in a formula amount into a mixer, stirring at the temperature of 110-120 ℃, vacuumizing and dehydrating, keeping the vacuum degree to be less than or equal to-0.09 Mpa, reducing the temperature to 80-85 ℃ when the moisture content is less than or equal to 0.005% to be detected, adding toluene diisocyanate in the formula amount, reacting for 2.5 hours, detecting the NCO content in the formula, and obtaining a first reaction product when the NCO content is less than or equal to 0.2%;
step two: adding the diphenylmethane diisocyanate with the formula amount into the first reaction product, adjusting the reaction temperature to 90-95 ℃, keeping the temperature for reaction for 2-2.5h, and stopping heating when the NCO% of the material is subjected to sampling titration to meet the formula design requirement, thus obtaining the polyurethane prepolymer;
step three: and adding the pre-dried powder material with the water content less than or equal to 0.05 percent and the pigment into the polyurethane prepolymer generated by the reaction in the second step, and stirring for 30min to uniformly mix the powder material and the pigment to obtain a third mixture.
Step four: and (3) cooling the mixture produced in the third step to below 60 ℃, adding the antioxidant, the ultraviolet absorbent, the catalyst, the composite anti-sagging agent and the defoaming agent in the formula amount, vacuumizing, keeping the vacuum degree at less than or equal to-0.09 Mpa, and stirring at the stirring speed of 600-800r/min for 15min to obtain the single-component polyurethane waterproof coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011596382.0A CN112708340A (en) | 2020-12-29 | 2020-12-29 | Anti-sagging single-component polyurethane waterproof coating capable of being sprayed and constructed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011596382.0A CN112708340A (en) | 2020-12-29 | 2020-12-29 | Anti-sagging single-component polyurethane waterproof coating capable of being sprayed and constructed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112708340A true CN112708340A (en) | 2021-04-27 |
Family
ID=75546436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011596382.0A Pending CN112708340A (en) | 2020-12-29 | 2020-12-29 | Anti-sagging single-component polyurethane waterproof coating capable of being sprayed and constructed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112708340A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113999611A (en) * | 2021-11-19 | 2022-02-01 | 雨中情防水技术集团股份有限公司 | Anti-aging single-component polyurethane waterproof coating |
| CN114213958A (en) * | 2021-12-20 | 2022-03-22 | 胜利油田大明新型建筑防水材料有限责任公司 | Biomass oil-based single-component polyurethane waterproof paint and preparation method thereof |
| CN115505324A (en) * | 2021-06-07 | 2022-12-23 | 上海涂固安高科技有限公司 | Formula of waterborne polyurethane high-performance anti-UV finish paint |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634534A (en) * | 2016-12-27 | 2017-05-10 | 苏州中材非金属矿工业设计研究院有限公司 | Anti-sagging single-ingredient polyurethane waterproof paint and preparation method thereof |
| CN111117549A (en) * | 2019-12-27 | 2020-05-08 | 雨中情防水技术集团有限责任公司 | Single-component polyurethane sealant prepared by using PAPI (polymethylacrylate polyimide) |
| CN111117465A (en) * | 2019-12-27 | 2020-05-08 | 雨中情防水技术集团有限责任公司 | Environment-friendly single-component polyurethane waterproof coating |
-
2020
- 2020-12-29 CN CN202011596382.0A patent/CN112708340A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634534A (en) * | 2016-12-27 | 2017-05-10 | 苏州中材非金属矿工业设计研究院有限公司 | Anti-sagging single-ingredient polyurethane waterproof paint and preparation method thereof |
| CN111117549A (en) * | 2019-12-27 | 2020-05-08 | 雨中情防水技术集团有限责任公司 | Single-component polyurethane sealant prepared by using PAPI (polymethylacrylate polyimide) |
| CN111117465A (en) * | 2019-12-27 | 2020-05-08 | 雨中情防水技术集团有限责任公司 | Environment-friendly single-component polyurethane waterproof coating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115505324A (en) * | 2021-06-07 | 2022-12-23 | 上海涂固安高科技有限公司 | Formula of waterborne polyurethane high-performance anti-UV finish paint |
| CN113999611A (en) * | 2021-11-19 | 2022-02-01 | 雨中情防水技术集团股份有限公司 | Anti-aging single-component polyurethane waterproof coating |
| CN114213958A (en) * | 2021-12-20 | 2022-03-22 | 胜利油田大明新型建筑防水材料有限责任公司 | Biomass oil-based single-component polyurethane waterproof paint and preparation method thereof |
| CN114213958B (en) * | 2021-12-20 | 2023-03-14 | 胜利油田大明新型建筑防水材料有限责任公司 | Biomass oil-based single-component polyurethane waterproof paint and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112708340A (en) | Anti-sagging single-component polyurethane waterproof coating capable of being sprayed and constructed | |
| CN107987779B (en) | A kind of reaction type polyurethane hot-melt adhesive and its preparation method and application | |
| CN111117465B (en) | Environment-friendly single-component polyurethane waterproof coating | |
| EP2596039A1 (en) | Sealant&adhesive using green prepolymer | |
| CN114181605B (en) | Single-component water-based polyurethane waterproof coating and preparation method thereof | |
| KR101680353B1 (en) | Urethane membrane material for waterproofing having insulation functions | |
| CN109777338A (en) | High-intensitive high elongation at tear monocomponent polyurethane adhesive and preparation method | |
| CN109897589B (en) | Environment-friendly high-elasticity sealant and preparation method thereof | |
| CN107033827B (en) | Single-component silane modified polyether sealant for building and preparation method thereof | |
| CN112341925B (en) | Anti-sagging solvent-free type single-component polyurethane waterproof paint and preparation method thereof | |
| CN109722204A (en) | Mono-component polyurethane bonded adhesives and preparation method thereof | |
| CN114196304A (en) | Solvent-free fluorine-modified polyaspartic acid ester multifunctional heat-insulating coating | |
| CN113999611B (en) | Anti-aging single-component polyurethane waterproof coating | |
| KR102031566B1 (en) | Waterproofing composition and Manufacturing method thereof | |
| CN111777887A (en) | Flame-retardant heat-resistant waterborne polyurethane coating and preparation method thereof | |
| CN113789147B (en) | Double-component neoprene composite rubber adhesive and preparation method thereof | |
| CN111117549B (en) | Single-component polyurethane sealant prepared by using PAPI (polymethylacrylate polyimide) | |
| CN110746872A (en) | Application of bio-based polyester-based polyurethane resin in preparation of high-solid-content polyurethane anticorrosive paint | |
| CN107955576B (en) | High-strength flame-retardant polyurethane sealant for high-speed railway passenger cars and preparation method thereof | |
| CN114574089B (en) | Single-component polyurethane waterproof coating capable of being formed by one-step construction and application thereof | |
| CN116496691A (en) | Environment-friendly solvent-free high-strength single-component polyurethane waterproof coating and preparation method thereof | |
| CN115595057A (en) | Anti-aging single-component polyurethane waterproof coating | |
| CN111909650A (en) | Moisture-curing polyurethane hot melt adhesive and preparation method thereof | |
| CN114231135A (en) | Outdoor mirror powder coating, preparation method thereof and coating formed by same | |
| CN111087915A (en) | Transparent bi-component polyurethane waterproof coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210427 |
|
| WD01 | Invention patent application deemed withdrawn after publication |