CN113943526A - Water-based two-component top-coat paint with low VOC (volatile organic compound) emission, and preparation method and application method thereof - Google Patents
Water-based two-component top-coat paint with low VOC (volatile organic compound) emission, and preparation method and application method thereof Download PDFInfo
- Publication number
- CN113943526A CN113943526A CN202111266948.8A CN202111266948A CN113943526A CN 113943526 A CN113943526 A CN 113943526A CN 202111266948 A CN202111266948 A CN 202111266948A CN 113943526 A CN113943526 A CN 113943526A
- Authority
- CN
- China
- Prior art keywords
- component
- water
- agent
- paint
- aqueous
- 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
- 239000003973 paint Substances 0.000 title claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000012855 volatile organic compound Substances 0.000 title description 17
- 239000000839 emulsion Substances 0.000 claims abstract description 37
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 26
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 20
- 239000004814 polyurethane Substances 0.000 claims abstract description 19
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920002635 polyurethane Polymers 0.000 claims abstract description 16
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- 238000007665 sagging Methods 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 12
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 12
- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000002562 thickening agent Substances 0.000 claims abstract description 11
- 238000009736 wetting Methods 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 10
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical compound CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims abstract description 9
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical class O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 239000001993 wax Substances 0.000 claims description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 5
- 239000000049 pigment Substances 0.000 claims description 5
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002114 nanocomposite Substances 0.000 claims description 4
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 3
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical group COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 3
- 150000002513 isocyanates Chemical class 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 13
- 239000011248 coating agent Substances 0.000 abstract description 11
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000001035 drying Methods 0.000 description 7
- 230000003254 anti-foaming effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229940094522 laponite Drugs 0.000 description 3
- XCOBTUNSZUJCDH-UHFFFAOYSA-B lithium magnesium sodium silicate Chemical compound [Li+].[Li+].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Na+].[Na+].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3 XCOBTUNSZUJCDH-UHFFFAOYSA-B 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 229910014314 BYK190 Inorganic materials 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- DMKSVUSAATWOCU-HROMYWEYSA-N loteprednol etabonate Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)OCCl)(OC(=O)OCC)[C@@]1(C)C[C@@H]2O DMKSVUSAATWOCU-HROMYWEYSA-N 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 241000988905 Acrophyllum Species 0.000 description 1
- 241001183967 Isodon Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
- B05D7/26—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials synthetic lacquers or varnishes
-
- 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
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
- C08G18/6229—Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- 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
-
- 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
- C08G2150/00—Compositions for coatings
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a low-VOC-emission water-based two-component top-coat paint, and a preparation method and a use method thereof, and belongs to the technical field of coatings, wherein the low-VOC-emission water-based two-component top-coat paint comprises a component A and a component B, wherein the component A comprises the following components: the coating comprises a water-based acrylic emulsion, a water-based polyurethane emulsion, a defoaming agent, a dispersing agent, matting powder, an anti-settling auxiliary agent, an anti-sagging auxiliary agent, a film-forming auxiliary agent, a wetting and leveling agent, a wax auxiliary agent, a thickening agent and water; the component B consists of the following components: modified HDI polyisocyanate, propylene glycol monomethyl ether acetate and EGDA solvent; the invention can solve the problems of high cost, poor leveling, poor defoaming property, small construction area, poor sagging prevention, long service life and the like of the traditional water-based two-component clear top coat.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based two-component top-coat paint with low VOC (volatile organic compound) emission, and a preparation method and a use method thereof.
Background
Along with the development and progress of social civilization, the low-carbon environmental protection consciousness of people to the environment is gradually strengthened, and environmental regulations established by various countries have strict limits on Volatile Organic Compounds (VOC) in the coating. In recent years, the use of oil paint is forbidden in Beijing, Shanghai and Shenzhen and Guangdong province in succession, more and more household enterprises are fiercely changing oil into water, the challenge of water paint is greater and greater, the traditional water paint scheme can not meet the requirements of diversified construction modes of furniture enterprises, particularly mechanical spraying, and the requirement on the construction tolerance of products is higher.
At present, most of low-VOC aqueous finishing paints are aqueous single-component series products, the construction latitude is good, but the defects of poor water resistance, chemical resistance, poor mechanical property, hot adhesion, cold brittleness, poor adhesive force and the like generally exist, and the low-VOC aqueous finishing paints are far from the traditional solvent-based PU finishing paints and are not suitable for coating woodware with high performance requirements. The physical and chemical properties of the coating film of the water-based two-component clear finish paint are close to those of the traditional solvent-based PU clear finish paint, and the water-based two-component clear finish paint can replace the traditional solvent-based PU clear finish paint to be applied to the coating with high performance requirements, but the traditional water-based two-component clear finish paint has the problems of high cost, short service life, unrecyclability, poor mechanical spraying defoaming, poor sagging prevention and the like, and the popularization and the application of the water-based two-component clear finish paint in the field of mechanical coating are seriously influenced.
Disclosure of Invention
In view of the above, the invention provides a low-VOC-emission aqueous two-component top-coat paint, and a preparation method and a use method thereof, which can solve the problems of high cost, poor leveling, poor defoaming property, small construction area, poor sagging prevention, short service life and the like of the traditional aqueous two-component top-coat paint.
In order to solve the technical problems, the invention provides a water-based two-component top-coat paint with low VOC emission, which comprises a component A and a component B,
the component A comprises the following components in parts by weight:
the sum of the raw materials contained in the component A is 100 percent;
wherein the water-based acrylic emulsion is a polyacrylate secondary dispersion containing hydroxyl, the hydroxyl is less than 3.0, the minimum film-forming temperature MFFT is more than 30 ℃, and PUBONDCF8022 produced by chemical production is preferred;
wherein the aqueous polyurethane emulsion has a minimum film forming temperature MFFT of > 20 ℃, preferably Setaqua19410, manufactured by Zhan Kaishiki;
the component B comprises the following components in parts by weight:
60.0-70.0% of modified HDI polyisocyanate
10.0 to 25.0 percent of propylene glycol methyl ether acetate
EGDA solvent 10.0% -20.0%
The sum of the raw materials in the component B is 100 percent;
wherein the modified HDI polyisocyanate is hydrophilic water dispersible isocyanate based on Hexamethylene Diisocyanate (HDI), and preferably Xiangfeng 817.
Further, the defoaming agent comprises a defoaming agent, a defoaming agent and an anti-foaming auxiliary agent, and is preferably a mixture consisting of a BYK-024 defoaming agent, a BYKETOL-AQ anti-foaming auxiliary agent and a TEGO Airex 902W defoaming agent and a TEGO Foamex 810 defoaming agent of Germany Bikko company;
the dispersing agent is a high-molecular copolymer aqueous solution containing high pigment affinity groups, and specifically is a mixture consisting of one or more of BYK190 dispersing agent and BYK194 dispersing agent of Germany Bick company, TEGO752 dispersing agent and TEGO755 dispersing agent of Germany winning company.
Further, the matting powder is organically treated amorphous silica, preferably SY7000 matting powder of Graes corporation, USA.
Further, the film-forming assistant is preferably dipropylene glycol methyl ether and diethylene glycol butyl ether available from Dow corporation, USA.
Further, the wetting and leveling agent refers to polyether modified siloxane, preferably TEGO Twin 4100 wetting and leveling agent of Germany Digao company or BYK 346 wetting and leveling agent of Germany Bike company.
Further, the wax auxiliary agent is modified paraffin emulsion, preferably AQUACER 539 of Germany Bike company;
the anti-settling aid is polyamide wax, preferably Disbarone AQ600 or AQ 633E;
the anti-sagging auxiliary agent is a functional magnesium aluminum silicate nano composite material, preferably LAPONITE S482 or LAPONITE RDS produced by Germany Bike;
the thickener is polyurethane associative thickener, preferably RM2020 or RM8W of Dow chemical or PUR44 or PUR64 of German Rabdosia.
Further, the water is pure water or deionized water.
A preparation method of a water-based two-component top-coat paint with low VOC emission comprises the following steps:
(1) firstly, taking half of the total amount of the aqueous acrylic emulsion and the aqueous polyurethane emulsion in the formula to a paint preparation cylinder, then adding a defoaming agent and a dispersing agent under the stirring state, and dispersing for 5 minutes at the speed of 1500-;
(2) slowly adding matting powder and pigment into the pre-dispersed emulsion, and dispersing at 1800-plus-one-2000 rpm to a specified fineness;
(3) slowly putting the rest of the water-based acrylic emulsion, the anti-settling auxiliary agent and the anti-sagging auxiliary agent into a paint making cylinder at one time under the stirring condition;
(4) uniformly mixing the film-forming assistant and water in advance, and slowly putting the mixture into a paint preparation cylinder under the stirring condition; then slowly and sequentially putting the wetting leveling agent, the wax assistant and the thickening agent into a paint preparation cylinder, and stirring for 10 minutes at the speed of 800-;
the preparation method of the component B comprises the following steps:
(1) mixing propylene glycol methyl ether acetate and EGDA solvent into the modified HDI polyisocyanate and stirring uniformly.
A method for using a water-based two-component top-coat paint with low VOC emission comprises the steps of uniformly mixing a component A and a component B according to an equivalent ratio of n (-NCO) to n (-OH) of 1.5-1.8 during construction, adding a certain amount of water, and adjusting the spraying viscosity to be 100-130 s.
The technical scheme of the invention has the following beneficial effects:
1. the water-based acrylic emulsion mixed water-based polyurethane emulsion with medium and low hydroxyl content is selected as a main film forming substance, the water-based acrylic emulsion with medium and low hydroxyl content is a secondary dispersion, and has the characteristics of low smell, high drying speed, high hardness, long service life and the like, and the water-based polyurethane emulsion has excellent performances of filler coating, paint film flexibility, adhesive force and the like due to the special molecular structure and aggregation state of the water-based acrylic emulsion. The method for mixing the waterborne polyurethane emulsion by selecting the waterborne acrylic emulsion can effectively combine the advantages of the waterborne acrylic emulsion and the waterborne polyurethane emulsion to prepare the waterborne two-component top-coat paint with low cost, quick drying, high hardness, excellent mechanical property and lower VOC discharge.
2. By adding a functional magnesium aluminum silicate nano composite material as an anti-sagging auxiliary agent, a three-dimensional net structure is formed among latex particles, so that a product system is endowed with a strong shearing and thinning function, and the spraying atomization property and the anti-sagging property are improved.
3. The defoaming agent, the defoaming agent and the anti-foaming auxiliary agent are reasonably matched, the defoaming agent is used for eliminating large bubbles on the surface of a paint film, the defoaming agent is used for removing micro bubbles in the paint film, and the anti-foaming auxiliary agent is used for reducing and inhibiting the generation of foams from the source, so that the defects of the paint film such as pinholes and hidden bubbles caused by mechanical bubbles and reaction bubbles generated in the mechanical spraying process are thoroughly solved.
4. The HDI type waterborne curing agent is selected, so that the service life of the system is prolonged more effectively on the premise of ensuring the good crosslinking performance and the resistance of a paint film, the physical drying of the system is accelerated, and the thickness of a foamless coating film is increased.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Example 1
A water-based two-component top-coat paint with low VOC emission comprises a component A and a component B,
the component A comprises the following components in parts by weight:
the sum of the raw materials contained in the component A is 100 percent;
the component B comprises the following components in parts by weight:
70.0 percent of modified HDI polyisocyanate
Propylene glycol methyl ether acetate 20%
EGDA solvent 10.0%
The sum of the raw materials in the component B is 100 percent.
Wherein the water-based acrylic emulsion is a polyacrylate secondary dispersion containing hydroxyl, the hydroxyl is less than 3.0, the minimum film-forming temperature MFFT is more than 30 ℃, and the water-based acrylic emulsion is specifically PUBONDCF8022 produced by chemical production;
wherein the minimum film-forming temperature MFFT of the waterborne polyurethane emulsion is more than 20 ℃, and the waterborne polyurethane emulsion is specifically Setaqua19410 which is produced by Zhan-Xinjiang chemistry;
the modified HDI polyisocyanate is hydrophilic water-dispersible isocyanate based on Hexamethylene Diisocyanate (HDI), and specifically comprises Acrophyllum Trattm 817.
The defoaming agent comprises a defoaming agent, a defoaming agent and an anti-foaming auxiliary agent, and specifically is a mixture consisting of a BYK-024 defoaming agent, a BYKETOL-AQ anti-foaming auxiliary agent and a TEGO Airex 902W defoaming agent and a TEGO Foamex 810 defoaming agent of Germany Bikko company;
the dispersing agent is a high-molecular copolymer aqueous solution containing high pigment affinity groups, and specifically is a mixture consisting of a BYK190 dispersing agent and a BYK194 dispersing agent of Germany Bick company, a TEGO752 dispersing agent and a TEGO755 dispersing agent of Germany Wingchu company.
Wherein the matting powder is organically treated amorphous silicon dioxide, in particular SY7000 matting powder of Grace corporation in America.
The film-forming assistant is dipropylene glycol methyl ether and diethylene glycol butyl ether of Dow company in America.
Wherein the wetting and leveling agent is polyether modified siloxane, in particular to TEGO Twin 4100 wetting and leveling agent of Germany Digao company.
Wherein the wax auxiliary agent is modified paraffin emulsion, in particular AQUACER 539 of Germany Bike company;
the anti-settling auxiliary agent is polyamide wax, in particular AQ600 of Disibaron;
the anti-sagging auxiliary agent is a functional magnesium aluminum silicate nano composite material, in particular LAPONITE S482 produced by Germany Bike;
the thickener is polyurethane associative thickener, specifically PUR44 of German Ming Ling.
Wherein the water is deionized water.
Example 2
This example differs from example 1 in that a low VOC emission, aqueous, two-component top coat comprising a first component and a second component,
the component A comprises the following components in parts by weight:
the sum of the raw materials contained in the component A is 100 percent;
the component B comprises the following components in parts by weight:
60.0 percent of modified HDI polyisocyanate
Propylene glycol methyl ether acetate 20%
EGDA 20.0%
The sum of the raw materials in the component B is 100 percent.
Example 3
This example differs from example 1 in that a low VOC emission, aqueous, two-component top coat comprising a first component and a second component,
the component A comprises the following components in parts by weight:
the sum of the raw materials contained in the component A is 100 percent;
the component B comprises the following components in parts by weight:
65.0 percent of modified HDI polyisocyanate
Propylene glycol methyl ether acetate 15.0%
EGDA 20.0%
The sum of the raw materials in the component B is 100 percent.
Example 4
The preparation method of the low-VOC-emission aqueous two-component top-coat paint in the embodiments 1 to 3 is the same, and the specific steps are as follows:
the preparation method of the component A comprises the following steps:
(1) firstly, taking half of the total amount of the aqueous acrylic emulsion and the aqueous polyurethane emulsion in the formula, putting the aqueous acrylic emulsion and the aqueous polyurethane emulsion into a paint preparation cylinder, then adding a defoaming agent and a dispersing agent under the stirring state, and dispersing for 5 minutes at the speed of 1800 rpm to prepare pre-dispersion emulsion;
(2) slowly adding matting powder and titanium dioxide into the pre-dispersed emulsion, and dispersing at the speed of 2000 rpm until the mixture reaches the specified fineness;
(3) slowly putting the rest of the water-based acrylic emulsion, the anti-settling auxiliary agent and the anti-sagging auxiliary agent into a paint making cylinder at one time under the stirring condition;
(4) uniformly mixing the film-forming assistant and water in advance, and slowly putting the mixture into a paint preparation cylinder under the stirring condition; slowly and sequentially putting the wetting leveling agent, the wax assistant and the thickening agent into a paint making cylinder, and stirring for 10 minutes at the speed of 1000 revolutions per minute until the wetting leveling agent, the wax assistant and the thickening agent are completely and uniformly mixed;
the preparation method of the component B comprises the following steps:
(1) mixing propylene glycol methyl ether acetate and EGDA solvent into the modified HDI polyisocyanate and stirring uniformly.
Examples of the experiments
The aqueous two-component white finish prepared by adding titanium dioxide in the embodiment 4 is taken for performance measurement,
the results of the measurement are shown in Table 1:
TABLE 1
The operation adopted in the detection process is specifically as follows:
sampling: according to the GB 3186 regulation;
the condition of the sample and the temperature and humidity of the test were adjusted according to the regulations of GB 9278.
Preparing a paint film: the preparation of the paint film is carried out according to the regulation of GB/T1727, and the varnish paint film is dried for 8 hours in a drying oven at 60 ℃ after being placed for 3 hours at room temperature. And (5) adjusting the dried paint film for 2 hours under the conditions of constant temperature and constant humidity, and then carrying out hardness test.
Film thickness: the measurement was carried out according to the GB/T13452.2. The thickness of the test paint film is specified, and the bottom paint and the top paint are (18 +/-3) um.
In-vessel conditions: the container is opened, stirred by a knife or a stirring rod, the bottom of the container is allowed to have sediment, and if the sediment is easy to be uniformly mixed by stirring, the sediment is judged to be uniform without hard lumps after stirring.
Solid content: the method is carried out according to the GB/T1725 specification.
Fineness: the method is carried out according to the GB/T1724 specification.
Storage stability: about 0.5L of the sample is put into a suitable plastic or glass container, about 10% of the space is left in the bottle, the bottle is sealed and then put into a constant temperature drying oven at (50 +/-2) DEG C, the bottle is taken out after 7 days and is placed at (23 +/-2) DEG C for 3 hours, the examination is carried out according to the method of 'in-container state', and if the sample is uniformly stirred without hard blocks, the bottle is considered to have no abnormity.
Freeze-thaw resistance: according to the specification of GB/T9755-.
Adhesion force: the method is carried out according to the GB/T9286-1998, and the space between the grids is 2 mm.
Hardness (scratch): the pencil is a Chinese 101 drawing pencil according to the GB/T6739 specification.
Construction property: the method is carried out according to 5.4 in GB/T9756-.
Sag resistance: the method is carried out according to the GB/T9264-88 regulation.
The appearance of the paint film is as follows: under the normal temperature state, taking a proper amount of water-based double-component white finish paint, adjusting the spraying viscosity to be 100-130 s (No. 2 cup in a rock field) according to the construction ratio, spraying four samples of the Baoli substrate by adopting a Crmlin high-pressure mixed gas spray gun, wherein the coating weight is about 140 plus 150 g/square meter, two paint films face upwards, two paint films face downwards and are inverted, drying is carried out in the environment with the temperature of 35 ℃ and the humidity of 20-30%, the paint film effect of the four samples is observed after the paint films are completely dried, and the paint film is judged to be normal if the paint films are uniform and smooth and have no pathological conditions such as sagging, flowering, dark bubbles, pinholes, cracking, wrinkling and the like.
Paint working time: under the condition of a constant-temperature water bath tank at 35 ℃, mixing a paint sample, a matched curing agent and water according to a required proportion, measuring the viscosity of the system every 0.5h from the beginning of mixing, respectively sampling and preparing a film, and testing the hardness, the adhesive force and the transparency of a dry film of the coating after the film is completely cured and dried for 48 h. If the viscosity of the system is measured to reach 2 times of the viscosity of the initial system or 1/2 at a certain time, and the dry film hardness, the adhesive force and the transparency of the system are similar to the performance of the initial system, the service life of the paint is considered at the time.
And (3) paint recovery condition: under the normal temperature state, taking a proper amount of water-based double-component white finish paint, adjusting the spraying viscosity to be 100s-130s (No. 2 cup in a rock field) according to the construction ratio, continuously spraying by adopting a Crmlin high-pressure gas mixing reciprocating machine spraying line, wherein the coating weight is about 140 plus 150 g/square meter, the oil pressure is 1.2-1.5par, collecting the recovered oil, observing the wet sample state and the paint film performance of a spraying plate test, and if the wet sample of the recovered oil is not seriously thickened, the dumping flow is continuous and the paint film performance of the spraying plate is not abnormal, judging as normal.
According to the analysis of the detection result, the low-VOC-emission aqueous two-component top-coat paint has the advantages of high drying speed, high hardness, long service life, excellent adhesive force and strong construction property, improves the spraying atomization property and the anti-sagging property, and avoids the defects of paint films such as pinholes and hidden bubbles caused by mechanical bubbles and reaction bubbles generated in the mechanical spraying process.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The water-based two-component top-coat paint with low VOC emission is characterized in that: comprises a component A and a component B;
the component A comprises the following components in parts by weight:
the sum of the raw materials contained in the component A is 100 percent;
the component B comprises the following components in parts by weight:
60.0-70.0% of modified HDI polyisocyanate
10.0 to 25.0 percent of propylene glycol methyl ether acetate
EGDA solvent 10.0% -20.0%
The sum of the raw materials in the component B is 100 percent.
2. The low-VOC emission, aqueous, two-component top-coat paint of claim 1, wherein: the water-based acrylic emulsion is a polyacrylate secondary dispersion containing hydroxyl, the hydroxyl is less than 3.0, and the minimum film-forming temperature MFFT is more than 30 ℃.
3. The low-VOC emission, aqueous, two-component top-coat paint of claim 1, wherein: the minimum film-forming temperature MFFT of the aqueous polyurethane emulsion is more than 20 ℃.
4. The low-VOC emission, aqueous, two-component top-coat paint of claim 1, wherein: the dispersant is a high-molecular copolymer aqueous solution containing high pigment affinity groups; the matting powder is organically treated amorphous silica.
5. The low-VOC emission, aqueous, two-component top-coat paint of claim 1, wherein: the film-forming auxiliary agent is dipropylene glycol methyl ether and diethylene glycol butyl ether; the wetting and leveling agent is polyether modified siloxane; the wax auxiliary agent is modified paraffin emulsion; the anti-settling auxiliary agent is polyamide wax; the anti-sagging auxiliary agent is a functional magnesium aluminum silicate nano composite material; the thickening agent is a polyurethane associative thickening agent.
6. The low-VOC emission, aqueous, two-component top-coat paint of claim 1, wherein: the modified HDI polyisocyanate is hydrophilic water-dispersible isocyanate based on Hexamethylene Diisocyanate (HDI).
7. A method for preparing the low VOC aqueous two-component clear top coat according to any of claims 1 to 6, characterized in that: the preparation method of the component A comprises the following steps:
(1) firstly, taking half of the total amount of the aqueous acrylic emulsion and the aqueous polyurethane emulsion in the formula to a paint preparation cylinder, then adding a defoaming agent and a dispersing agent under the stirring state, and dispersing for 5 minutes at the speed of 1500-;
(2) slowly adding matting powder and pigment into the pre-dispersed emulsion, and dispersing at 1800-plus-one-2000 rpm to a specified fineness;
(3) slowly putting the rest of the water-based acrylic emulsion, the anti-settling auxiliary agent and the anti-sagging auxiliary agent into a paint making cylinder at one time under the stirring condition;
(4) uniformly mixing the film-forming assistant and water in advance, and slowly putting the mixture into a paint preparation cylinder under the stirring condition; then slowly and sequentially putting the wetting leveling agent, the wax assistant and the thickening agent into a paint preparation cylinder, and stirring for 10 minutes at the speed of 800-;
the preparation method of the component B comprises the following steps:
(1) mixing propylene glycol methyl ether acetate and EGDA solvent into the modified HDI polyisocyanate and stirring uniformly.
8. Use of a low VOC emission two-component, water-borne top-coat paint according to any of claims 1-6, characterized in that: during construction, the component A and the component B are uniformly mixed according to the equivalent ratio of n (-NCO) to n (-OH) being 1.5-1.8, a certain amount of water is added, and the spraying viscosity is adjusted to be 100s-130 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111266948.8A CN113943526A (en) | 2021-10-28 | 2021-10-28 | Water-based two-component top-coat paint with low VOC (volatile organic compound) emission, and preparation method and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111266948.8A CN113943526A (en) | 2021-10-28 | 2021-10-28 | Water-based two-component top-coat paint with low VOC (volatile organic compound) emission, and preparation method and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113943526A true CN113943526A (en) | 2022-01-18 |
Family
ID=79337525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111266948.8A Pending CN113943526A (en) | 2021-10-28 | 2021-10-28 | Water-based two-component top-coat paint with low VOC (volatile organic compound) emission, and preparation method and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113943526A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746643A (en) * | 2022-10-13 | 2023-03-07 | 河南立邦长润发科技材料有限公司 | High-permeability double-component primer and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0562282A1 (en) * | 1992-03-23 | 1993-09-29 | OECE Industrie Chimiche Spa | Two-component water-based varnishes containing acrylic-urethane polymers |
| CN104877107A (en) * | 2014-02-28 | 2015-09-02 | 拜耳材料科技(中国)有限公司 | Aqueous dual-component polyurethane paint system |
| CN105505165A (en) * | 2015-12-25 | 2016-04-20 | 澳达树熊涂料(惠州)有限公司 | Scratch-resistant double-component waterborne glossy varnish and preparation method thereof |
| CN112048237A (en) * | 2020-07-25 | 2020-12-08 | 上海立邦长润发涂料有限公司 | Water-based double-component matte clear finish paint and preparation method thereof |
| CN113248999A (en) * | 2021-05-22 | 2021-08-13 | 上海立邦长润发涂料有限公司 | Recyclable water-based double-component white finish suitable for mechanical spraying and preparation method thereof |
-
2021
- 2021-10-28 CN CN202111266948.8A patent/CN113943526A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0562282A1 (en) * | 1992-03-23 | 1993-09-29 | OECE Industrie Chimiche Spa | Two-component water-based varnishes containing acrylic-urethane polymers |
| CN104877107A (en) * | 2014-02-28 | 2015-09-02 | 拜耳材料科技(中国)有限公司 | Aqueous dual-component polyurethane paint system |
| CN105505165A (en) * | 2015-12-25 | 2016-04-20 | 澳达树熊涂料(惠州)有限公司 | Scratch-resistant double-component waterborne glossy varnish and preparation method thereof |
| CN112048237A (en) * | 2020-07-25 | 2020-12-08 | 上海立邦长润发涂料有限公司 | Water-based double-component matte clear finish paint and preparation method thereof |
| CN113248999A (en) * | 2021-05-22 | 2021-08-13 | 上海立邦长润发涂料有限公司 | Recyclable water-based double-component white finish suitable for mechanical spraying and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 李广宇等: "《胶黏剂原材料手册》", 31 August 2004, 国防工业出版社 * |
| 武利民等: "《现代涂料配方设计》", 30 June 2001, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746643A (en) * | 2022-10-13 | 2023-03-07 | 河南立邦长润发科技材料有限公司 | High-permeability double-component primer and preparation method thereof |
| CN115746643B (en) * | 2022-10-13 | 2024-03-26 | 河南立邦长润发科技材料有限公司 | High-permeability double-component primer and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110922874B (en) | Water-based acrylic polyurethane amino baking pearlescent paint and preparation method thereof | |
| CN111019504B (en) | Waterborne polyurethane coating composition and application thereof | |
| CN113248999A (en) | Recyclable water-based double-component white finish suitable for mechanical spraying and preparation method thereof | |
| CN115746643B (en) | High-permeability double-component primer and preparation method thereof | |
| CN105949983A (en) | Quick-drying scratch-resistant varnish composition with high solid content as well as preparation method and application of quick-drying scratch-resistant varnish composition | |
| CN110669419A (en) | Water-based acrylic polyurethane coating and preparation method thereof | |
| CN107418277B (en) | A kind of water nano long-effective corrosion finishing coat and preparation method thereof | |
| CN109337547B (en) | High-performance polyurethane composite material and preparation method thereof | |
| CN110669422A (en) | Double-component exterior wall coating and preparation method thereof | |
| CN110698963A (en) | High-wear-resistance water-based acrylic acid-polyurethane two-component finish paint | |
| CN110845921A (en) | Water-based high-performance coating for plastic | |
| CN112812670A (en) | Bi-component PU coating and application thereof | |
| CN107936814A (en) | The net taste woodcare paint of high hardness polyurethane that a kind of POSS is modified | |
| CN112852273A (en) | Water-based matte scratch-resistant paint and application thereof | |
| CN114292575A (en) | Boiling-resistant sunscreen cream-resistant waterborne polyurethane coating for automotive interior and preparation method and use method thereof | |
| CN111777933A (en) | Aqueous two-component white elastic wood finish and preparation method thereof | |
| CN115286986A (en) | Skin-feel matte clear finish paint for woodware, and preparation method and application thereof | |
| CN113943526A (en) | Water-based two-component top-coat paint with low VOC (volatile organic compound) emission, and preparation method and application method thereof | |
| CN114316738A (en) | Epoxy transparent primer coating for water-based carbon fiber substrate fishing rod | |
| CN111995940B (en) | Super-matte PU odor-free clear finishing coat and preparation method thereof | |
| CN114045074A (en) | Water-based pencil draw-coating matte varnish and preparation method thereof | |
| CN114539895A (en) | Water-based PU (polyurethane) coating and coating process | |
| CN111978811A (en) | Water-based single-component top-coat paint and preparation method thereof | |
| CN112251123B (en) | Ultraviolet-resistant color modifier and preparation method thereof | |
| CN113045977A (en) | Water-based acrylic polyurethane coating for assembly type building steel structure 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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220118 |