CN110845955A - High-temperature-resistant environment-friendly coating for engineering machinery and preparation method thereof - Google Patents
High-temperature-resistant environment-friendly coating for engineering machinery and preparation method thereof Download PDFInfo
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- CN110845955A CN110845955A CN201911211294.1A CN201911211294A CN110845955A CN 110845955 A CN110845955 A CN 110845955A CN 201911211294 A CN201911211294 A CN 201911211294A CN 110845955 A CN110845955 A CN 110845955A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 56
- 238000000576 coating method Methods 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 76
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims abstract description 57
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 39
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 38
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000010702 perfluoropolyether Substances 0.000 claims abstract description 20
- JVYDLYGCSIHCMR-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butanoic acid Chemical compound CCC(CO)(CO)C(O)=O JVYDLYGCSIHCMR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 19
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims abstract description 19
- 239000012975 dibutyltin dilaurate Substances 0.000 claims abstract description 19
- 229920000570 polyether Polymers 0.000 claims abstract description 19
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000016 photochemical curing Methods 0.000 claims abstract description 17
- LNBSKWVLUJUCLA-UHFFFAOYSA-N C(C=C)(=O)OOCC.C(C=C)(=O)OOCC.OCC(C)(CO)C Chemical compound C(C=C)(=O)OOCC.C(C=C)(=O)OOCC.OCC(C)(CO)C LNBSKWVLUJUCLA-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011527 polyurethane coating Substances 0.000 claims abstract description 15
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims abstract description 13
- 239000005058 Isophorone diisocyanate Substances 0.000 claims abstract description 13
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims abstract description 13
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 12
- WURBFLDFSFBTLW-UHFFFAOYSA-N benzil Chemical compound C=1C=CC=CC=1C(=O)C(=O)C1=CC=CC=C1 WURBFLDFSFBTLW-UHFFFAOYSA-N 0.000 claims description 6
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 6
- 239000012965 benzophenone Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000011941 photocatalyst Substances 0.000 claims description 6
- 150000003512 tertiary amines Chemical class 0.000 claims description 6
- -1 pentaerythritol triacrylate ester Chemical class 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 4
- FAQJJMHZNSSFSM-UHFFFAOYSA-N phenylglyoxylic acid Chemical compound OC(=O)C(=O)C1=CC=CC=C1 FAQJJMHZNSSFSM-UHFFFAOYSA-N 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000012855 volatile organic compound Substances 0.000 abstract description 10
- 239000000809 air pollutant Substances 0.000 abstract description 3
- 231100001243 air pollutant Toxicity 0.000 abstract description 3
- 238000001723 curing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000005336 cracking Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000013638 trimer Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
-
- 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
- C08G18/4808—Mixtures of two or more polyetherdiols
-
- 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
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5003—Polyethers having heteroatoms other than oxygen having halogens
- C08G18/5015—Polyethers having heteroatoms other than oxygen having halogens having fluorine atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of engineering machinery, in particular to a high-temperature-resistant environment-friendly coating for engineering machinery, which comprises the following components: hexamethylene diisocyanate, dimethylol butyric acid, polyether glycol 1000, perfluoropolyether glycol 200, isophorone diisocyanate, pentaerythritol triacrylate, a photoinitiator, triethylamine, dimethylformamide, dibutyl tin dilaurate, neopentyl glycol diethoxy diacrylate, acetone and a suitable amount of water; the photocuring waterborne polyurethane coating prepared by the invention has the advantages of good water resistance, high surface glossiness, good wear resistance and high coating film hardness, and Volatile Organic Compounds (VOC) and harmful air pollutants in the coating are remarkably reduced, so that the photocuring waterborne polyurethane coating is more environment-friendly.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a high-temperature-resistant environment-friendly coating for engineering machinery and a preparation method thereof.
Background
The engineering machinery is a machine for constructing and serving various basic construction projects such as urban and rural areas, railways, highways, ports and docks, irrigation and water conservancy, electric power, metallurgy, mines, sea and air bases and the like. In China, the engineering machinery mainly comprises: excavating machinery, shovel soil transportation machinery, engineering hoisting machinery, road surface machinery, compaction machinery, piling machinery, reinforced concrete machinery, rock drilling machinery, forklift, special engineering machinery and the like 10 categories. The main common engineering machines are: hydraulic excavators, crawler dozers, wheel loaders, road rollers, land levelers, pavers, forklifts, truck cranes, and the like.
At present, the coating is widely applied to engineering machinery. In the coating applied to engineering machinery, especially in chemical synthesis production, especially relating to storage machinery of chemicals or processing machinery and devices, the mechanical coating is required to have good chemical resistance; meanwhile, in the processing process of other machines, the vibration of the machine is also one of the factors for reducing the service life of the coating, and the phenomena of paint falling, loosening and the like of the coating on the surface of the machine are frequently caused by long-time mechanical vibration, so that the coating is often required to have good hardness and good flexibility; many engineering machines require heating during processing, and therefore, the coating is required to have good heat resistance.
Meanwhile, with the enhancement of environmental protection and energy consciousness of people, the use of the traditional solvent-based paint is increasingly limited due to a large amount of Volatile Organic Compounds (VOC) and harmful air pollutants contained in the traditional solvent-based paint.
Disclosure of Invention
In order to solve the problems, the invention provides the high-temperature-resistant environment-friendly coating for the engineering machinery, which has the advantages of excellent waterproof effect, high coating hardness, high surface smoothness, high temperature resistance and low pollutant emission.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a high-temperature-resistant environment-friendly coating for engineering machinery comprises the following components in parts by weight: 10.2-12.1 parts of hexamethylene diisocyanate, 4.0-5.5 parts of dimethylolbutyric acid, 100018.0-24.0 parts of polyether glycol, 2003.0-4.0 parts of perfluoropolyether glycol, 3.4-4.0 parts of isophorone diisocyanate, 14.5-16.5 parts of pentaerythritol triacrylate, 1.2-1.8 parts of photoinitiator, 3.2-4.4 parts of triethylamine, 6.7-7.0 parts of dimethylformamide, 0.4-0.6 part of dibutyltin dilaurate, 16.0-18.0 parts of neopentyl glycol diethoxy diacrylate, 30-60 parts of acetone and a proper amount of water.
Preferably, the preparation method of the high-temperature-resistant environment-friendly coating for the engineering machinery comprises the following steps:
a. adding 1000 parts of polyether glycol, 200 parts of perfluoropolyether glycol, 0.2-0.3 part of dimethylolbutyric acid, dimethylformamide and dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 120-150r/min, dropwise adding weighed hexamethylene diisocyanate tripolymer into the mixture within 60min, reacting at 55-60 ℃ for 150min, heating to 65-68 ℃, continuing to react for 2h, sampling every 0.5h to determine the mass percent of-NCO of the system until the mass percent of-NCO-is less than one thousandth, and recording the obtained product as a mixed component A;
b. adding 0.2-0.3 part of isophorone diisocyanate and dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 80-120r/min, dropwise adding weighed pentaerythritol triacrylate into the mixture, reacting at 45-48 ℃ for 120min, heating to 50 ℃, continuing to react for 90min, sampling every 0.5h to determine the mass percent of-NCO of the system, when the mass percent of-NCO is less than one thousandth, increasing the reaction temperature to 55-60 ℃, dropwise adding the mixed component A into the reaction system within 30min, adding acetone to adjust the viscosity, reacting for 120min, increasing the temperature to 65-68 ℃, continuing to react for 1h, and reducing the temperature to the normal temperature to obtain a mixed component B;
c. heating the mixed component B to 30-40 ℃, adding triethylamine and a proper amount of water, stirring for 1h at the speed of 240-one-resin 300r/min, removing acetone in vacuum, adding neopentyl glycol diethoxy diacrylate, and uniformly mixing to obtain the waterproof photocuring waterborne polyurethane coating.
Preferably, the photocatalyst is any one of benzil ketal, benzoyl formate, benzophenone and tertiary amine promoter.
Preferably, in the step a, the polyether glycol 1000 and the perfluoropolyether glycol 200 are fed in a mass ratio of 6: 1.
Preferably, the dropping speed of the pentaerythritol triacrylate in step b is 14.5-16.5 parts/h.
Preferably, the mass ratio of triethylamine to dimethylolbutyric acid in step c is 4: 5.
Preferably, the mass ratio of water to mixed component B in step c is 3: 1.
Has the advantages that:
the photocuring waterborne polyurethane coating prepared by the invention has the advantages of good water resistance, high surface glossiness, good wear resistance and high coating film hardness, and Volatile Organic Compounds (VOC) and harmful air pollutants in the coating are remarkably reduced, so that the photocuring waterborne polyurethane coating is more environment-friendly. The addition of the perfluoropolyether diol can effectively reduce the surface energy and the friction coefficient of the coating film, so that the water resistance and the wear resistance of the coating film are improved. The addition of the reactive diluent neopentyl glycol diethoxy diacrylate can adjust the viscosity of the waterborne polyurethane coating, double bonds on the neopentyl glycol diethoxy diacrylate have high reactivity, and the reactive diluent can react with double bonds on a molecular chain during photocuring reaction so that a coating film has high tensile strength and toughness. In addition, the photocuring waterborne polyurethane prepared by the invention has multiple functional groups, can effectively improve the crosslinking density of molecular chains in the photocuring process, reduces the permeability of a coating film, improves the water resistance and hardness of the coating, and simultaneously tests show that the coating has no cracking and peeling phenomena in use in a high-temperature environment, so that the coating has good high-temperature resistance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a high-temperature-resistant environment-friendly coating for engineering machinery comprises the following components in parts by weight: 10.2 parts of hexamethylene diisocyanate, 4.0 parts of dimethylolbutyric acid, 100018.0 parts of polyether glycol, 2003.0 parts of perfluoropolyether glycol, 3.4 parts of isophorone diisocyanate, 14.5 parts of pentaerythritol triacrylate, 1.4 parts of a photoinitiator, 3.2 parts of triethylamine, 6.7 parts of dimethylformamide, 0.4 part of dibutyltin dilaurate, 16.0 parts of neopentyl glycol diethoxy diacrylate, 30 parts of acetone and a proper amount of water.
A high-temperature-resistant environment-friendly coating for engineering machinery is prepared by the following steps:
a. adding 1000 parts of polyether glycol, 200 parts of perfluoropolyether glycol, 200 parts of dimethylolbutyric acid, dimethylformamide and 0.2 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 120r/min, dropwise adding weighed hexamethylene diisocyanate trimer into the mixture within 60min, reacting at 55 ℃ for 150min, heating to 65 ℃, continuing to react for 2h, sampling and measuring the mass percent of-NCO of the system every 0.5h until the mass percent of-NCO is less than one thousandth, and recording the obtained product as a mixed component A;
b. adding 0.2 part of isophorone diisocyanate and 0.2 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 80r/min, dropwise adding weighed pentaerythritol triacrylate into the mixture, reacting at 45 ℃ for 120min, heating to 50 ℃, continuing to react for 90min, sampling every 0.5h to determine the mass percent of-NCO of the system, when the mass percent of-NCO is less than one thousandth, heating the reaction temperature to 55 ℃, dropwise adding the mixed component A into the reaction system within 30min, adding acetone to adjust the viscosity, reacting for 120min, heating to 65 ℃, continuing to react for 1h, and then cooling to the normal temperature to obtain a mixed component B;
c. and heating the mixed component B to 30 ℃, adding triethylamine and a proper amount of water, stirring at the speed of 240r/min for 1h, removing acetone in vacuum, adding neopentyl glycol diethoxy diacrylate, and uniformly mixing to obtain the waterproof photocuring waterborne polyurethane coating.
The photocatalyst is any one of benzil ketal, benzoyl formic ether, benzophenone and tertiary amine promoter.
In the step a, feeding the polyether glycol 1000 and the perfluoropolyether glycol 200 according to the mass ratio of 6: 1.
The dropping speed of the pentaerythritol triacrylate in step b was 14.5 parts/h.
In the step c, the mass ratio of the triethylamine to the dimethylolbutyric acid is 4: 5.
The mass ratio of water to the mixed component B in the step c is 3: 1.
Through tests, the waterproof photocuring waterborne polyurethane coating prepared in the example 1 has the coating film pencil hardness of 3H and the coating film (the coating film thickness is 20 mu m, and the 2KW ultraviolet curing lamp is irradiated) curing time of 45 s. The water is boiled and soaked for 2h at the temperature of 80 ℃, and the cracking and peeling phenomena are avoided. The coating does not crack and peel after being soaked in water at 25 ℃ for 168 hours, and the VOC content is 83.5g/L per liter.
Example 2:
a high-temperature-resistant environment-friendly coating for engineering machinery comprises the following components in parts by weight: 10.8 parts of hexamethylene diisocyanate, 4.5 parts of dimethylolbutyric acid, 100022.0 parts of polyether glycol, 2003.7 parts of perfluoropolyether glycol, 3.6 parts of isophorone diisocyanate, 15.0 parts of pentaerythritol triacrylate, 1.6 parts of a photoinitiator, 3.6 parts of triethylamine, 7.0 parts of dimethylformamide, 0.5 part of dibutyltin dilaurate, 18.0 parts of neopentyl glycol diethoxy diacrylate, 40 parts of acetone and a proper amount of water.
A high-temperature-resistant environment-friendly coating for engineering machinery is prepared by the following steps:
a. adding 1000 parts of polyether glycol, 200 parts of perfluoropolyether glycol, 200 parts of dimethylolbutyric acid, dimethylformamide and 0.2 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 130r/min, dropwise adding weighed hexamethylene diisocyanate trimer into the mixture within 60min, reacting at 56 ℃ for 150min, heating to 66 ℃, continuing to react for 2h, sampling and measuring the mass percent of-NCO of the system every 0.5h until the mass percent of-NCO is less than one thousandth, and recording the obtained product as a mixed component A;
b. adding 0.3 part of isophorone diisocyanate and 0.3 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 90r/min, dropwise adding weighed pentaerythritol triacrylate into the mixture, reacting at 46 ℃ for 120min, heating to 50 ℃, continuing to react for 90min, sampling every 0.5h to determine the mass percent of-NCO of the system, when the mass percent of-NCO is less than one thousandth, heating the reaction temperature to 56 ℃, dropwise adding the mixed component A into the reaction system within 30min, adding acetone to adjust the viscosity, reacting for 120min, heating to 66 ℃, continuing to react for 1h, and cooling to the normal temperature to obtain a mixed component B;
c. and (3) heating the mixed component B to 35 ℃, adding triethylamine and a proper amount of water, stirring at the speed of 260r/min for 1h, removing acetone in vacuum, adding neopentyl glycol diethoxy diacrylate, and uniformly mixing to obtain the waterproof photocuring waterborne polyurethane coating.
The photocatalyst is any one of benzil ketal, benzoyl formic ether, benzophenone and tertiary amine promoter.
In the step a, feeding the polyether glycol 1000 and the perfluoropolyether glycol 200 according to the mass ratio of 6: 1.
And in the step b, the dropping speed of the pentaerythritol triacrylate is 15.0 parts/h.
In the step c, the mass ratio of the triethylamine to the dimethylolbutyric acid is 4: 5.
The mass ratio of water to the mixed component B in the step c is 3: 1.
Through tests, the waterproof photocuring waterborne polyurethane coating prepared in example 2 has the coating pencil hardness of 4H and the curing time of 42s (coating thickness of 20um and 2KW irradiated by an ultraviolet curing lamp). The water is boiled and soaked for 2h at the temperature of 80 ℃, and the cracking and peeling phenomena are avoided. After being soaked in water at 25 ℃ for 168 hours, the coating does not crack or peel, and the VOC content is 85.5g/L per liter.
Example 3:
a high-temperature-resistant environment-friendly coating for engineering machinery comprises the following components in parts by weight: 11.4 parts of hexamethylene diisocyanate, 5.0 parts of dimethylolbutyric acid, 100024.0 parts of polyether glycol, 2004.0 parts of perfluoropolyether glycol, 3.8 parts of isophorone diisocyanate, 16.5 parts of pentaerythritol triacrylate, 1.2 parts of a photoinitiator, 4.0 parts of triethylamine, 6.9 parts of dimethylformamide, 0.5 part of dibutyltin dilaurate, 17.0 parts of neopentyl glycol diethoxy diacrylate, 50 parts of acetone and a proper amount of water.
A high-temperature-resistant environment-friendly coating for engineering machinery is prepared by the following steps:
a. adding 1000 parts of polyether glycol, 200 parts of perfluoropolyether glycol, 200 parts of dimethylolbutyric acid, dimethylformamide and 0.3 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 140r/min, dropwise adding weighed hexamethylene diisocyanate trimer into the mixture within 60min, reacting at 58 ℃ for 150min, heating to 67 ℃, continuing to react for 2h, sampling and measuring the mass percent of-NCO of the system every 0.5h until the mass percent of-NCO is less than one thousandth, and recording the obtained product as a mixed component A;
b. adding 0.2 part of isophorone diisocyanate and 0.2 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 100r/min, dropwise adding weighed pentaerythritol triacrylate into the mixture, reacting at 47 ℃ for 120min, heating to 50 ℃, continuing to react for 90min, sampling every 0.5h to determine the mass percent of-NCO of the system, when the mass percent of-NCO is less than one thousandth, heating the reaction temperature to 58 ℃, dropwise adding the mixed component A into the reaction system within 30min, adding acetone to adjust the viscosity, reacting for 120min, heating to 67 ℃, continuing to react for 1h, and cooling to normal temperature to obtain a mixed component B;
c. and (3) heating the mixed component B to 35 ℃, adding triethylamine and a proper amount of water, stirring at the speed of 280r/min for 1h, removing acetone in vacuum, adding neopentyl glycol diethoxy diacrylate, and uniformly mixing to obtain the waterproof photocuring waterborne polyurethane coating.
The photocatalyst is any one of benzil ketal, benzoyl formic ether, benzophenone and tertiary amine promoter.
In the step a, feeding the polyether glycol 1000 and the perfluoropolyether glycol 200 according to the mass ratio of 6: 1.
And in the step b, the dropping speed of the pentaerythritol triacrylate is 16.0 parts/h.
In the step c, the mass ratio of the triethylamine to the dimethylolbutyric acid is 4: 5.
The mass ratio of water to the mixed component B in the step c is 3: 1.
Through testing, the waterproof photocuring waterborne polyurethane coating prepared in example 3 has the coating pencil hardness of 4H and the coating curing time (coating thickness of 20um and 2KW irradiated by an ultraviolet curing lamp) of 43 s. The water is boiled and soaked for 2h at the temperature of 80 ℃, and the cracking and peeling phenomena are avoided. After being soaked in water at 25 ℃ for 168 hours, the coating does not crack or peel, and the VOC content is 84.6g/L per liter.
Example 4:
a high-temperature-resistant environment-friendly coating for engineering machinery comprises the following components in parts by weight: 12.1 parts of hexamethylene diisocyanate, 5.5 parts of dimethylolbutyric acid, 100020.0 parts of polyether glycol, 2003.3 parts of perfluoropolyether glycol, 4.0 parts of isophorone diisocyanate, 16.0 parts of pentaerythritol triacrylate, 1.8 parts of a photoinitiator, 4.4 parts of triethylamine, 6.8 parts of dimethylformamide, 0.6 part of dibutyltin dilaurate, 17.0 parts of neopentyl glycol diethoxy diacrylate, 60 parts of acetone and a proper amount of water.
A high-temperature-resistant environment-friendly coating for engineering machinery is prepared by the following steps:
a. adding 1000 parts of polyether glycol, 200 parts of perfluoropolyether glycol, 200 parts of dimethylolbutyric acid, dimethylformamide and 0.3 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 150r/min, dropwise adding weighed hexamethylene diisocyanate trimer into the mixture within 60min, reacting at 60 ℃ for 150min, heating to 68 ℃, continuing to react for 2h, sampling and measuring the mass percent of-NCO of the system every 0.5h until the mass percent of-NCO is less than one thousandth, and recording the obtained product as a mixed component A;
b. adding 0.3 part of isophorone diisocyanate and 0.3 part of dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 120r/min, dropwise adding weighed pentaerythritol triacrylate into the mixture, reacting at 48 ℃ for 120min, heating to 50 ℃, continuing to react for 90min, sampling every 0.5h to determine the mass percent of-NCO of the system, when the mass percent of-NCO is less than one thousandth, heating the reaction temperature to 60 ℃, dropwise adding the mixed component A into the reaction system within 30min, adding acetone to adjust the viscosity, reacting for 120min, heating to 68 ℃, continuing to react for 1h, and then cooling to the normal temperature to obtain a mixed component B;
c. and (3) heating the mixed component B to 40 ℃, adding triethylamine and a proper amount of water, stirring at the speed of 300r/min for 1h, removing acetone in vacuum, adding neopentyl glycol diethoxy diacrylate, and uniformly mixing to obtain the waterproof photocuring waterborne polyurethane coating.
The photocatalyst is any one of benzil ketal, benzoyl formic ether, benzophenone and tertiary amine promoter.
In the step a, feeding the polyether glycol 1000 and the perfluoropolyether glycol 200 according to the mass ratio of 6: 1.
And the dropping speed of the pentaerythritol triacrylate in the step b is 16.5 parts/h.
In the step c, the mass ratio of the triethylamine to the dimethylolbutyric acid is 4: 5.
The mass ratio of water to the mixed component B in the step c is 3: 1.
Through tests, the waterproof photocuring waterborne polyurethane coating prepared in the example 4 has the coating pencil hardness of 4H and the curing time of 42s for coating (the coating thickness is 20 mu m, and the coating is irradiated by a 2KW ultraviolet curing lamp). The water is boiled and soaked for 2h at the temperature of 80 ℃, and the cracking and peeling phenomena are avoided. After being soaked in water at 25 ℃ for 168 hours, the coating has no cracking and peeling phenomena, and the VOC content is 87.2 g/L.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The high-temperature-resistant environment-friendly coating for the engineering machinery is characterized by comprising the following components in parts by weight: 10.2-12.1 parts of hexamethylene diisocyanate, 4.0-5.5 parts of dimethylolbutyric acid, 100018.0-24.0 parts of polyether glycol, 2003.0-4.0 parts of perfluoropolyether glycol, 3.4-4.0 parts of isophorone diisocyanate, 14.5-16.5 parts of pentaerythritol triacrylate ester, 1.2-1.8 parts of photoinitiator, 3.2-4.4 parts of triethylamine, 6.7-7.0 parts of dimethylformamide, 0.4-0.6 part of dibutyl tin dilaurate, 16-18 parts of neopentyl glycol diethoxy diacrylate, 30-60 parts of acetone and a proper amount of water.
2. The preparation method of the high temperature resistant environment-friendly coating for the engineering machinery as claimed in claim 1, characterized by comprising the following steps:
a. adding 1000 parts of polyether glycol, 200 parts of perfluoropolyether glycol, 0.2-0.3 part of dimethylolbutyric acid, dimethylformamide and dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 120-150r/min, dropwise adding weighed hexamethylene diisocyanate tripolymer into the mixture within 60min, reacting at 55-60 ℃ for 150min, heating to 65-68 ℃, continuing to react for 2h, sampling every 0.5h to determine the mass percent of-NCO of the system until the mass percent of-NCO-is less than one thousandth, and recording the obtained product as a mixed component A;
b. adding 0.2-0.3 part of isophorone diisocyanate and dibutyl tin dilaurate into a reaction kettle, stirring at the speed of 80-120r/min, dropwise adding weighed pentaerythritol triacrylate into the mixture, reacting at 45-48 ℃ for 120min, heating to 50 ℃, continuing to react for 90min, sampling every 0.5h to determine the mass percent of-NCO of the system, when the mass percent of-NCO is less than one thousandth, increasing the reaction temperature to 55-60 ℃, dropwise adding the mixed component A into the reaction system within 30min, adding acetone to adjust the viscosity, reacting for 120min, increasing the temperature to 65-68 ℃, continuing to react for 1h, and reducing the temperature to the normal temperature to obtain a mixed component B;
c. heating the mixed component B to 30-40 ℃, adding triethylamine and a proper amount of water, stirring for 1h at the speed of 240-one-resin 300r/min, removing acetone in vacuum, adding neopentyl glycol diethoxy diacrylate, and uniformly mixing to obtain the waterproof photocuring waterborne polyurethane coating.
3. The high-temperature-resistant environment-friendly paint for engineering machinery as claimed in claim 1, wherein: the photocatalyst is any one of benzil ketal, benzoyl formate, benzophenone and tertiary amine accelerators.
4. The preparation method of the high-temperature-resistant environment-friendly coating for the engineering machinery as claimed in claim 2, wherein the preparation method comprises the following steps: in the step a, feeding the polyether glycol 1000 and the perfluoropolyether glycol 200 according to the mass ratio of 6: 1.
5. The preparation method of the high-temperature-resistant environment-friendly coating for the engineering machinery as claimed in claim 2, wherein the preparation method comprises the following steps: in the step b, the dropping speed of the pentaerythritol triacrylate is 14.5-16.5 parts/h.
6. The preparation method of the high-temperature-resistant environment-friendly coating for the engineering machinery as claimed in claim 2, wherein the preparation method comprises the following steps: in the step c, the mass ratio of the triethylamine to the dimethylolbutyric acid is 4: 5.
7. The preparation method of the high-temperature-resistant environment-friendly coating for the engineering machinery as claimed in claim 2, wherein the preparation method comprises the following steps: the mass ratio of water to the mixed component B in the step c is 3: 1.
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