CN112457761A - Anti-sagging quick-drying type two-component polyurethane waterproof paint and preparation method and application thereof - Google Patents
Anti-sagging quick-drying type two-component polyurethane waterproof paint and preparation method and application thereof Download PDFInfo
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- 239000003973 paint Substances 0.000 title claims abstract description 57
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 56
- 239000004814 polyurethane Substances 0.000 title claims abstract description 56
- 238000001035 drying Methods 0.000 title claims abstract description 23
- 238000007665 sagging Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 36
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 239000004014 plasticizer Substances 0.000 claims abstract description 20
- 229920000909 polytetrahydrofuran Polymers 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 19
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 12
- 229920000570 polyether Polymers 0.000 claims abstract description 12
- 229920002396 Polyurea Polymers 0.000 claims abstract description 11
- 239000006229 carbon black Substances 0.000 claims abstract description 11
- 150000002148 esters Chemical class 0.000 claims abstract description 11
- 239000012948 isocyanate Substances 0.000 claims abstract description 11
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims abstract description 10
- -1 aliphatic isocyanate Chemical class 0.000 claims abstract description 10
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims abstract description 8
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 8
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 8
- 239000004970 Chain extender Substances 0.000 claims abstract description 7
- 239000011241 protective layer Substances 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 239000011256 inorganic filler Substances 0.000 claims abstract description 5
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 21
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 13
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical group OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 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 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- 239000000440 bentonite Substances 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 7
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical group CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 5
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- 238000004078 waterproofing Methods 0.000 claims description 5
- 229920000608 Polyaspartic Polymers 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 14
- 239000000047 product Substances 0.000 description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical group O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 5
- 229910021384 soft carbon Inorganic materials 0.000 description 5
- 238000009736 wetting Methods 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 208000005156 Dehydration Diseases 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002513 isocyanates Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 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
- 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
- C09D7/65—Additives macromolecular
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Hydrology & Water Resources (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Electromagnetism (AREA)
- Paints Or Removers (AREA)
Abstract
An anti-sagging quick-drying type two-component polyurethane waterproof paint comprises a component A and a component B in a weight ratio of (1: 1) - (1: 2), wherein the component A is mainly prepared from polytetrahydrofuran ether glycol, aliphatic isocyanate, a plasticizer, a chain extender and a catalyst A; the component B is mainly prepared from ethylenediamine polyether, polyaspartic acid ester polyurea resin, a plasticizer, carbon black, a catalyst B, an inorganic filler, a thixotropic agent and other auxiliaries. The preparation method comprises the following steps: dehydrating polytetrahydrofuran ether glycol in vacuum, cooling, and adding other components to prepare a component A; uniformly dispersing the ethylenediamine polyether and the polyaspartic acid ester polyurea resin, adding other components, and grinding to obtain the component B. The waterproof paint disclosed by the invention belongs to aliphatic polyurethane waterproof paint, a concrete protective layer is not required in waterproof layer construction, the waterproof paint can be directly exposed, meanwhile, the concrete protective layer is not required, the sagging resistance value of the waterproof paint is more than 500 mu m, the surface drying is fast, and the product curing period is shortened.
Description
Technical Field
The invention belongs to the field of coatings, and particularly relates to an anti-sagging quick-drying type two-component polyurethane waterproof paint, and a preparation method and application thereof.
Background
The concrete can generate a plurality of tiny channels or holes in the hydration reaction process, so that external corrosion factors can easily permeate into the concrete, the reinforcing steel bar is corroded, the concrete is cracked, and the durability of the whole structure is reduced. In order to avoid the damage of external factors to concrete structures such as tunnels, bridges, building roofs, underground engineering and the like, the waterproof and impermeable project is very important, and relatively speaking, the surface coating technology is an economic and practical protection technology.
Traditional polyurethane waterproof layer construction generally is polyurethane waterproof coating + concrete protection layer, and polyurethane waterproof coating is synthetic by aromatic isocyanate and polyether polyol basically for the waterproof layer can't expose the use, and the plane generally all needs 2 ~ 3 shaping in the work progress, facade or inclined plane generally construct 4 ~ 8 shaping, lead to the construction lead cycle length of product, extravagant meeting is more serious in the work progress, lead to the use to be restricted, product maintenance cycle length simultaneously, these objective factors have restricted its application.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects and shortcomings in the background technology and providing the anti-sagging quick-drying type two-component polyurethane waterproof paint and the preparation method and application thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an anti-sagging quick-drying type two-component polyurethane waterproof paint comprises a component A and a component B in a weight ratio of (1: 1) - (1: 2), wherein the component A is mainly prepared from the following raw materials: 50-80 parts of polytetrahydrofuran ether glycol, 20-40 parts of aliphatic isocyanate, 1-10 parts of plasticizer and 0-5 parts of chain extender;
the component B is mainly prepared from the following raw materials: 2-20 parts of ethylenediamine polyether, 20-60 parts of polyaspartic acid ester polyurea resin and 5-15 parts of plasticizer.
In the above polyurethane waterproofing paint, preferably, the polytetrahydrofuran ether glycol includes polytetrahydrofuran ether glycol with adjustable molecular weight, and the polytetrahydrofuran ether glycol is at least one or more selected from PTMEG1000, PTMEG1400, PTMEG1800 and PTMEG 2000.
In the polyurethane waterproof paint, the plasticizer is preferably a synthetic bio-ester. Further preferably HC-180, the heating loss at 125 ℃ is less than or equal to 0.35 percent, and the kinematic viscosity at 40 ℃ is 40-50 cst.
According to the invention, the ratio of polytetrahydrofuran ether glycol with different molecular weights in the component A is changed, the polytetrahydrofuran ether glycol and aliphatic isocyanate are subjected to polycondensation reaction to form a curing agent containing terminal isocyanate, and then the curing agent reacts with the component B to form a waterproof system. The component B contains thixotropy, after the component A and the component B are mixed, a curing agent reacts with hydroxyl in the ethylenediamine polyether and the curing agent reacts with amino in the polyaspartic ester polyurea resin to form a waterproof film with rich elasticity, and compared with the traditional polyurethane waterproof coating, the waterproof coating has better sagging resistance, faster drying (surface drying and actual drying) and excellent ultraviolet aging resistance; meanwhile, the viscosity of the coating can be further reduced by selecting the environment-friendly plasticizer to synthesize the bio-ester, the plasticizing efficiency of the synthetic bio-ester HC-180 is high, and the coating film is endowed with better flexibility.
Preferably, the raw material of the component A also comprises 0.01-0.1 part by weight of a catalyst A, and the catalyst A is an organic bismuth DY-20 catalyst.
Preferably, the raw materials of the component B further comprise 0.3-1 part by weight of carbon black, 0.01-1 part by weight of catalyst B, 25.5-75 parts by weight of inorganic filler, 0.5-3 parts by weight of thixotropic agent and 1-5 parts by weight of other auxiliary agents
In the polyurethane waterproofing paint, the catalyst B is preferably dibutyltin dilaurate; the inorganic filler comprises 20-40 parts by weight of titanium dioxide, 5-30 parts by weight of barium sulfate and 0.5-5 parts by weight of bentonite; the other auxiliary agents comprise 0.2-2 parts by weight of defoaming agent, 0.5-2 parts by weight of flatting agent and 0.3-1 part by weight of dispersing agent.
Preferably, the bentonite is Bentone 38, the titanium dioxide is R996 rutile type titanium dioxide, and the barium sulfate is precipitated barium sulfate of 3000 meshes;
the defoaming agent is an organic silicon defoaming agent, and is preferably one or two of defom 6800 and defom 6500; the leveling agent is BYK-306, the dispersing agent is dispiner 904s wetting dispersing agent, and the thixotropic agent is Crayvallac MT; the carbon black is soft carbon black.
Preferably, the polyurethane waterproof paint is prepared from F420 serving as the polyaspartic ester polyurea resin, wherein the NH equivalent of the resin is 291g/mol, and the viscosity of the resin at 25 ℃ is 1200-1500 mPa.s;
the ethylenediamine polyether is selected from JQN-405, the hydroxyl value is 425-475mgKOH/g, and the viscosity at 25 ℃ is 3000-4500 mPa.s.
In the polyurethane waterproof paint, preferably, the aliphatic isocyanate is isophorone diisocyanate (IPDI); the chain extender is 1,4 butanediol,
as a general inventive concept, the present invention also provides a method for preparing the polyurethane waterproof paint, including the steps of:
(1) putting polytetrahydrofuran ether glycol into a closed container, heating to 120 ℃ for vacuum dehydration treatment, then cooling to 65-75 ℃, adding aliphatic isocyanate and a catalyst A, controlling the temperature to be 75-90 ℃ for reaction for 2-4h, adding a chain extender, continuing to control the temperature to be 75-90 ℃ for reaction for 1-2 h, adding a plasticizer, stirring for 20-30 min, and obtaining a component A after detecting that the NCO value is qualified;
(2) uniformly dispersing the ethylenediamine polyether and the polyaspartic acid ester polyurea resin, adding the plasticizer, the flatting agent, the dispersing agent, the defoaming agent and the catalyst B, uniformly stirring, adding the titanium dioxide, the bentonite, the barium sulfate, the carbon black and the thixotropic agent, uniformly stirring, and grinding to obtain the component B with the fineness of less than 40 microns.
In the above production method, it is preferable that in the step (1), the water content of the polytetrahydrofuran ether glycol after the dehydration treatment is controlled to 500ppm or less;
the NCO qualified value of the component A is 4-12%.
As a general inventive concept, the invention also provides an application of the polyurethane waterproof paint or the polyurethane waterproof paint prepared by the preparation method in concrete structure waterproof engineering, wherein the concrete structure waterproof engineering comprises tunnels, bridges, building roofs, underground engineering and the like, the plane construction is carried out for 1 time, the vertical surface construction is carried out for 1-3 times, and a concrete protective layer is not required in waterproof layer construction.
Compared with the prior art, the invention has the advantages that:
(1) the component A in the polyurethane waterproof paint can control the viscosity of the component and the strength and flexibility of a coating film by adjusting the proportion of different molecular weights of polytetrahydrofuran ether glycol, and ensures the optimal performance of the paint.
(2) The polyurethane waterproof paint disclosed by the invention uses the environment-friendly plasticizer, so that the viscosity of a coating system is adjusted, the flexibility of a coating is increased, the viscosity of the coating system can be reduced, the solid content of the coating system can be increased, and the flexibility of the coating can be improved without using a solvent.
(3) According to the invention, the bentonite and the thixotropic agent are added, so that the sagging resistance of the product is improved, and the comprehensive performance of the polyurethane waterproof paint is improved.
(4) The invention also utilizes various auxiliary agents to improve the interface performance of the coating, and utilizes the ethylenediamine polyether, the polyaspartic acid ester polyurea resin and the dibutyltin dilaurate to control the working life and the surface drying and actual drying time.
(5) The anti-sagging quick-drying type double-component polyurethane waterproof paint disclosed by the invention is formed in a plane construction mode for 1 time, and formed in a vertical surface construction mode for 1-3 times, the waterproof paint belongs to aliphatic polyurethane waterproof paint, a concrete protective layer is not required in waterproof layer construction, the waterproof layer can be directly exposed, the construction period is shortened, the concrete protective layer is not required, the product maintenance period is shortened, the anti-sagging value of the waterproof paint is more than 500 micrometers, the construction times are shortened while the construction thickness is ensured, the surface drying is quick, and the product maintenance period is shortened.
(6) The preparation method has simple process and easy operation, and is suitable for large-scale industrial production.
In conclusion, the invention improves the anti-sagging performance of the polyurethane waterproof paint during construction, and meets the requirement that the paint can be quickly dried, thereby shortening the delivery cycle and the construction cycle of the polyurethane waterproof paint; meanwhile, in the polyurethane waterproof paint, the polyether, the polyaspartic acid ester polyurea resin and the aliphatic isocyanate are chemically crosslinked, cured and formed into a film, so that the mechanical property of the film is ensured, and the polyurethane waterproof paint has excellent ultraviolet aging resistance, salt spray resistance test and acid and alkali resistance. Through tests, the performance indexes of the polyurethane waterproof paint are shown in table 1, the bonding strength of the polyurethane waterproof paint and a concrete base surface is more than or equal to 3.0MPa, the sagging resistance index reaches 750-2500 mu m, the surface drying time can be controlled within 1h, the actual drying time is controlled within 4h, and the solid content is more than 95.0 percent.
TABLE 1 Performance index of the polyurethane waterproofing paint of the present invention
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
the invention relates to an anti-sagging quick-drying type two-component polyurethane waterproof paint which is composed of a component A and a component B in a mass ratio of 1: 1.5; wherein the component A is prepared from the following raw materials in parts by weight: 50 parts of PTMEG1000, 15 parts of PTMEG2000, 30 parts of IPDI, 4.45 parts of HC-180 plasticizer, 0.05 part of DY-20 catalyst and 0.5 part of 1, 4-butanediol; the component B is prepared from the following raw materials in parts by weight: 5 parts of JQN-405, 30 parts of F420, 10 parts of HC-180 plasticizer, 25 parts of R996 titanium dioxide, 25 parts of 3000-mesh precipitated barium sulfate, 1.4 parts of BENTONE 38, 0.5 part of defom 6800, 0.5 part of soft carbon black, 0.5 part of BYK-306, 0.5 part of disponer904 wetting dispersant 904s, 1.5 parts of Crayvallac MT and 0.1 part of dibutyltin dilaurate.
The preparation method of the anti-sagging quick-drying two-component polyurethane waterproof paint comprises the following steps:
(1) weighing 50kg of PTMEG1000 and 15kg of PTMEG2000, dehydrating at 120 ℃, adding 30kg of IPDI and 0.05kg of DY-20 catalyst after the water content is detected to be qualified (the water content is controlled below 500 ppm), keeping the temperature at 80-90 ℃ for 2.5h for full reaction, adding 0.5kg of 1, 4-butanediol for reaction for 1h, adding 4.45kg of HC-180, stirring for 20min, and discharging after the NCO value is detected to be qualified (the detected NCO value is within the range of 6.0-6.5%), thus obtaining the component A with the viscosity detected to be 5000 mPa.s.
(2) Weighing 5kg of JQN-405, 30kg of F420, 10kg of HC-180 plasticizer, 25kgR996 titanium dioxide, 25kg of 3000-mesh precipitated barium sulfate, 1.4kg of BENTONE 38, 0.5kg of defom 6800, 0.5kg of soft carbon black, 0.5kg of BYK-306, 0.5kg of disponer904s wetting dispersant, 1.5kg of Crayvallac MT and 0.1kg of dibutyltin dilaurate, and grinding the components to the fineness of less than 40 mu m to obtain the component B.
(3) Taking A, B components according to the mass ratio of 1:1.5 to prepare the anti-sagging quick-drying type aliphatic two-component polyurethane waterproof paint, and performing performance test on an aliphatic polyurethane waterproof paint film prepared from the polyurethane, wherein the test results are shown in table 2.
Example 2:
the invention relates to an anti-sagging quick-drying type two-component polyurethane waterproof paint which is composed of a component A and a component B in a mass ratio of 1: 1.75; wherein the component A is mainly prepared from the following raw materials in parts by weight: 25 parts of PTMEG1000, 40 parts of PTMEG2000, 30 parts of IPDI, 0.05 part of DY-20 catalyst, 0.5 part of 1, 4-butanediol and 4.45 parts of HC-180 plasticizer; the component B is prepared from the following raw materials in parts by weight: 3 parts of JQN-405, 32 parts of F420, 10 parts of HC-180 plasticizer, 25 parts of R996 titanium dioxide, 25 parts of 3000-mesh precipitated barium sulfate, 1.4 parts of BENTONE 38, 0.5 part of defom 6800, 0.5 part of soft carbon black, 0.5 part of BYK-306, 0.5 part of disponer904 wetting dispersant 904s, 1.5 parts of Crayvallac MT and 0.1 part of dibutyltin dilaurate.
The preparation method of the anti-sagging quick-drying two-component polyurethane waterproof paint comprises the following steps:
(1) weighing 25kg of PTMEG1000 and 40kg of PTMEG2000, dehydrating at 120 ℃, adding 30kg of IPDI and 0.05kg of DY-20 catalyst after the water content is detected to be qualified (the water content is controlled below 500 ppm), keeping the temperature at 80-90 ℃ for reaction for 2.5h, adding 0.5kg of 1, 4-butanediol for reaction for 1h, adding 4.45kg of HC-180, stirring for 20min, discharging when the NCO value is detected to be 7.0-7.5%, and obtaining a component A, wherein the viscosity of the component A is detected to be 3800 mpa.s;
(2) 3kg of JQN-405, 32kg of F420, 10kg of HC-180 plasticizer, 25kgR996 titanium dioxide, 25kg of 3000-mesh precipitated barium sulfate, 1.4kg of BENTONE 38, 0.5kg of defom 6800, 0.5kg of soft carbon black, 0.5kg of BYK-306, 0.5kg of disponer904s wetting dispersant, 1.5kg of Crayvallac MT and 0.1kg of dibutyltin dilaurate are weighed, and the component B is obtained after the grinding fineness is below 40 mu m.
(3) Taking A, B components according to the mass ratio of 1:1.75 to prepare the anti-sagging quick-drying type aliphatic two-component polyurethane waterproof paint, and the aliphatic polyurethane waterproof paint film prepared from the polyurethane is subjected to performance test, wherein the test results are shown in table 2.
Table 2: performance test results of polyurethane waterproof paint
The results of the tests on the A, B component manufactured in example 1 and example 2 are shown in Table 3.
Table 3: the A, B component test indicator results of examples 1 and 2 ("-" indicates that no test is required)
From the test data in tables 1, 2 and 3, the component A can obtain proper initial viscosity by adjusting the proportions of polytetrahydrofuran ether glycol with different molecular weights, and the component B can obtain a better thixotropic system by adding a thixotropic agent and bentonite, so that the anti-sagging index of the product is improved. The polyurethane waterproof paint has excellent anti-sagging performance during construction, can be quickly dried and solidified, and can shorten the delivery cycle and the construction cycle of the polyurethane waterproof paint; the polyurethane waterproof paint film has excellent mechanical properties, excellent ultraviolet aging resistance, salt spray resistance test and acid and alkali resistance, is an exposed polyurethane waterproof paint, does not need to be provided with a concrete protective layer on the waterproof film, and can be applied to concrete structure waterproof engineering including tunnels, bridges, building roofs and underground engineering.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The anti-sagging quick-drying type two-component polyurethane waterproof paint comprises a component A and a component B in a weight ratio of (1: 1) - (1: 2), and is characterized in that the component A is mainly prepared from the following raw materials: 50-80 parts of polytetrahydrofuran ether glycol, 20-40 parts of aliphatic isocyanate, 1-10 parts of plasticizer and 0-5 parts of chain extender;
the component B is mainly prepared from the following raw materials: 2-20 parts of ethylenediamine polyether, 20-60 parts of polyaspartic acid ester polyurea resin and 5-15 parts of plasticizer.
2. The polyurethane waterproof paint according to claim 1, wherein the polytetrahydrofuran ether glycol includes polytetrahydrofuran ether glycol whose molecular weight is adjustable, and the polytetrahydrofuran ether glycol is at least one or more selected from PTMEG1000, PTMEG1400, PTMEG1800, and PTMEG 2000.
3. The polyurethane waterproof paint according to claim 1, wherein the plasticizer is a synthetic bio-ester.
4. The polyurethane waterproof paint of claim 1, wherein the raw material of the component a further comprises 0.01 to 0.1 parts by weight of a catalyst a, and the catalyst a is selected from an organic bismuth DY-20 catalyst.
5. The polyurethane waterproof paint according to claim 1, wherein the raw materials of the component B further comprise 0.3 to 1 part by weight of carbon black, 0.01 to 1 part by weight of catalyst B, 25.5 to 75 parts by weight of inorganic filler, 0.5 to 3 parts by weight of thixotropic agent and 1 to 5 parts by weight of other auxiliary agents.
6. The polyurethane waterproofing paint according to claim 5, wherein said catalyst B is selected from the group consisting of dibutyltin dilaurate; the inorganic filler comprises 20-40 parts by weight of titanium dioxide, 5-30 parts by weight of barium sulfate and 0.5-5 parts by weight of bentonite; the other auxiliary agents comprise 0.2-2 parts by weight of defoaming agent, 0.5-2 parts by weight of flatting agent and 0.3-1 part by weight of dispersing agent.
7. The polyurethane waterproof paint according to any one of claims 1 to 6, wherein the polyaspartic ester polyurea resin is F420, has an NH equivalent of 291g/mol, and has a viscosity of 1200 to 1500mPa.s at 25 ℃;
the ethylenediamine polyether is selected from JQN-405, the hydroxyl value is 425-475mgKOH/g, and the viscosity at 25 ℃ is 3000-4500 mPa.s;
the aliphatic isocyanate is isophorone diisocyanate;
the chain extender is 1,4 butanediol.
8. A method for preparing the polyurethane waterproofing paint according to any one of claims 1 to 7, comprising the steps of:
(1) putting polytetrahydrofuran ether glycol into a closed container, heating to 120 ℃ for vacuum dehydration treatment, then cooling to 65-75 ℃, adding aliphatic isocyanate and a catalyst A, controlling the temperature to be 75-90 ℃ for reaction for 2-4h, adding a chain extender, continuing to control the temperature to be 75-90 ℃ for reaction for 1-2 h, adding a plasticizer, stirring for 20-30 min, and obtaining a component A after detecting that the NCO value is qualified;
(2) uniformly dispersing the ethylenediamine polyether and the polyaspartic acid ester polyurea resin, adding the plasticizer, the flatting agent, the dispersing agent, the defoaming agent and the catalyst B, uniformly stirring, adding the titanium dioxide, the barium sulfate, the bentonite, the carbon black and the thixotropic agent, uniformly stirring, and grinding to obtain the component B with the fineness of less than 40 microns.
9. The process according to claim 8, wherein in the step (1), the water content of the dehydrated polytetrahydrofuran ether glycol is controlled to 500ppm or less;
the NCO qualified value of the component A is 4-12%.
10. The application of the polyurethane waterproof paint of any one of claims 1 to 7 or prepared by the preparation method of any one of claims 8 to 9 in concrete structure waterproof engineering is characterized in that the polyurethane waterproof paint is formed for 1 time in plane construction and for 1 to 3 times in vertical construction, and a concrete protective layer is not required in waterproof layer construction.
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| CN103805048A (en) * | 2014-03-04 | 2014-05-21 | 大连怿文新材料科技发展有限公司 | Polyaspartic acid ester protective paint for landscape prop and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103805048A (en) * | 2014-03-04 | 2014-05-21 | 大连怿文新材料科技发展有限公司 | Polyaspartic acid ester protective paint for landscape prop and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 杨杨等: "《土木工程材料》", 31 July 2018 * |
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