CN115247013A - Aqueous coating composition with high storage stability - Google Patents
Aqueous coating composition with high storage stability Download PDFInfo
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- CN115247013A CN115247013A CN202110459656.XA CN202110459656A CN115247013A CN 115247013 A CN115247013 A CN 115247013A CN 202110459656 A CN202110459656 A CN 202110459656A CN 115247013 A CN115247013 A CN 115247013A
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- coating composition
- aqueous coating
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- 239000008199 coating composition Substances 0.000 title claims abstract description 115
- 239000002562 thickening agent Substances 0.000 claims abstract description 120
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical compound CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000004952 Polyamide Substances 0.000 claims abstract description 28
- 239000003513 alkali Substances 0.000 claims abstract description 28
- 229920002647 polyamide Polymers 0.000 claims abstract description 28
- 239000004814 polyurethane Substances 0.000 claims abstract description 27
- 229920002635 polyurethane Polymers 0.000 claims abstract description 27
- 239000002904 solvent Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 230000008961 swelling Effects 0.000 claims abstract description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 40
- 239000000839 emulsion Substances 0.000 claims description 12
- JJDGTGGQXAAVQX-UHFFFAOYSA-N 6-methyl-1-(6-methylheptoxy)heptane Chemical compound CC(C)CCCCCOCCCCCC(C)C JJDGTGGQXAAVQX-UHFFFAOYSA-N 0.000 claims description 11
- 229920003180 amino resin Polymers 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 8
- 229920000178 Acrylic resin Polymers 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 229920001225 polyester resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 5
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002671 adjuvant Substances 0.000 claims description 4
- 239000002518 antifoaming agent Substances 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 238000009736 wetting Methods 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 238000000518 rheometry Methods 0.000 claims description 3
- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical compound CCOCC(C)O JOLQKTGDSGKSKJ-UHFFFAOYSA-N 0.000 claims description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 claims description 2
- GBSGXZBOFKJGMG-UHFFFAOYSA-N 3-propan-2-yloxypropan-1-ol Chemical compound CC(C)OCCCO GBSGXZBOFKJGMG-UHFFFAOYSA-N 0.000 claims description 2
- 239000003002 pH adjusting agent Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 42
- 239000003973 paint Substances 0.000 abstract description 26
- 238000000576 coating method Methods 0.000 abstract description 23
- 239000011248 coating agent Substances 0.000 abstract description 21
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 description 70
- 229920003270 Cymel® Polymers 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 24
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 24
- 238000009472 formulation Methods 0.000 description 22
- 238000002360 preparation method Methods 0.000 description 18
- NECRQCBKTGZNMH-UHFFFAOYSA-N 3,5-dimethylhex-1-yn-3-ol Chemical compound CC(C)CC(C)(O)C#C NECRQCBKTGZNMH-UHFFFAOYSA-N 0.000 description 13
- 239000006185 dispersion Substances 0.000 description 12
- 229940093476 ethylene glycol Drugs 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 9
- 239000012972 dimethylethanolamine Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 6
- 239000008346 aqueous phase Substances 0.000 description 6
- 239000008213 purified water Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 229920006310 Asahi-Kasei Polymers 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229920002125 Sokalan® Polymers 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical group 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- -1 but not limited to Chemical compound 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 238000012029 structural testing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920003275 CYMEL® 325 Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000010797 grey water Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
- C09D7/20—Diluents or solvents
-
- 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
- C09D7/43—Thickening agents
- C09D7/44—Combinations of two or more thickening agents
-
- 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
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a high-storage-stability water-based paint composition, which comprises a film-forming resin (A), a curing agent (B), a solvent (C) and an auxiliary agent (D), wherein the solvent (C) contains isooctanol, the auxiliary agent (D) contains a rheological auxiliary agent, the rheological auxiliary agent contains a thickening agent, and the thickening agent is selected from the combination of at least two of polyurethane thickening agent, polyamide thickening agent and alkali swelling thickening agent. In the aqueous coating composition of the present invention, by selecting a specific combination of thickeners and adjusting the amounts of various thickeners and isooctyl alcohol, the storage stability of the aqueous coating composition can be effectively controlled and the appearance of the system can be effectively improved, thereby enabling the aqueous coating composition of the present invention to solve the problem of viscosity increase or viscosity reduction of an aqueous coating for automobiles during storage.
Description
Technical Field
The invention relates to the field of coatings. More particularly, it relates to a water-based coating composition having high storage stability.
Background
At present, each automobile coating manufacturer has a respective water-based coating system to be matched with an automobile body of a finished automobile, although different manufacturers have respective formula systems, the technical problem of viscosity increasing or reducing during the use process is faced due to the complexity of the water-based colored paint formula.
Although the idea of designing the formula is different from one manufacturer to another, the storage stability of the formula is a certain problem.
In view of the above, there is a need to provide a new water-based coating composition with high storage stability to overcome the above technical problems.
Disclosure of Invention
The invention aims to provide a water-based paint composition with high storage stability, which solves the problem of thickening or viscosity reduction of a water-based paint for an automobile during storage.
To achieve the above object, according to one aspect of the present invention, there is provided a high storage stability aqueous coating composition comprising a film-forming resin (a), a curing agent (B), a solvent (C), and an auxiliary (D); wherein the solvent (C) comprises isooctanol and the adjuvant (D) comprises a rheology adjuvant comprising a thickener selected from the group consisting of polyurethane thickeners, polyamide thickeners, and alkali swellable thickeners.
Preferably, in the water-based coating composition, the mass percentage of the isooctyl alcohol is in the range of 0.10% to 4.00%.
Preferably, in the aqueous coating composition, the thickener is present in an amount of 2.00 to 3.04% by mass.
Preferably, the thickener is selected from the group consisting of polyamide thickeners and alkali swellable thickeners. More preferably, in the aqueous coating composition, the mass percent of the polyamide thickener is in a range of 2.00% -2.60%, and the mass percent of the alkali-swellable thickener is in a range of 0.15% -0.25%.
Preferably, the thickener is selected from the group consisting of polyurethane thickeners, polyamide thickeners, and alkali swellable thickeners. More preferably, in the aqueous coating composition, the mass percentage of the polyurethane thickener is in the range of 0.02-0.04%, the mass percentage of the polyamide thickener is in the range of 2.05-2.50%, and the mass percentage of the alkali-swellable thickener is in the range of 0.15-0.5%.
In some embodiments, the polyurethane thickener is selected from, for example, the rheology aid ADEKANOL UH-814N available from ADEKA corporation, rheovis PU1251, PU1191 available from new materials basf limited.
In some embodiments, the polyamide thickener is selected from, for example, DISPARLON AQ-630, DISPARLON AQ-600, AQ-607, DISPARLON AQ-610, DISPARLON AQ-870, and the like, available from Nangen Chemicals.
In some embodiments, the alkali swellable thickener is selected from Rheovis AS1130, rheovis AS1125 available from Pasteur New materials, inc., or Malachi available from Town Corp TM (ACRYSOL TM )ASE-60。
In some embodiments, the film-forming resin (a) is 30 to 40% by mass in the aqueous coating composition.
In some embodiments, the mass percentage of the curing agent (B) in the aqueous coating composition is 10 to 15%.
In some embodiments, the mass percentage of the auxiliary (D) in the aqueous coating composition is 8 to 12%.
In some embodiments, in the aqueous coating composition, the solvent (C) is present in an amount to complement the mass percent to 100%.
In some embodiments, the aqueous coating composition further comprises a pigment filler (E). Preferably, in the aqueous coating composition, the pigment and filler (E) is 8 to 12% by mass. Particularly preferably, the pigment and filler (E) is related powder products such as barium sulfate, kaolin, titanium dioxide and the like which are suitable for water-based paint, or emulsion prepared after processing, such as but not limited to products of Noroo automobile coating company under the trade names AR 2000 (T) BF-21 PASTE, AR 2000 (T) BF-20PASTE, AR-2000 (T) EMPERROR BLACK KAI UDP and the like.
In some embodiments, the pigment fillers (E) may also include aluminum flake pearlescence such as, but not limited to, one or more of the Merck XIRALLIC series, PYRISMA series, iriodin series, or pearlescence products with equivalent glitter.
In some embodiments, the pigment filler (E) may also include aluminum powder, such as, but not limited to, aluminum PASTE 06-0672N from Toyo and ASAHI-KASEI PASTE CP-315 from Asahi Kasei Corporation or other substitute aluminum powder companies having the same level.
In some embodiments, in the aqueous coating composition, the film-forming resin (a) comprises: at least one water-soluble acrylic resin (A1), at least one acrylic resin emulsion (A2) and at least one polyester resin emulsion (A3). Preferably, the mass ratio of the water-soluble acrylic resin (A1), the acrylic resin emulsion (A2) and the polyester resin emulsion (A3) is: 1, (5-12) and (1.5-2.5).
Preferably, the water-soluble acrylic resin (A1) is, for example, but not limited to, at least one of ACW-1011, ACW-1024, and the like, of Noroo automotive coatings Co., ltd, ACS-1016, ACS-1213, and the like, or ACW-1011, ACW-1024, and the like, of Dieser synthetic resins (Zhongshan) Co., ltd.
Preferably, the acrylic RESIN emulsion (A2) is, for example, but not limited to, at least one of products of trade names such as EMA-1036RESIN, EMA-1032RESIN, EMA-1015RESIN, etc. from Japan paint Kabushiki Kaisha, or products of PZW-1001, etc. from Noroo automobile paint Co.
Preferably, the polyester resin emulsion (A3) is an aqueous polyurethane emulsion suitable for aqueous systems and having a filling effect on paint films, such as but not limited to: products of grade No. such as NEOREZ R-9603, NEOREZ R-960, NEOREZ R-1000, NEOREZ R-2150 of Disumann Pratent Co., ltd, products of grade No. such as PRS-1045RESIN, PRS-1025RESIN, PRS-1015RESIN, PRS-1035RESIN of Japan paint Kabushiki Kaisha, or at least one of aqueous polyurethane UCOAT N-800 of Shanghai Kazakhstan trading Co., ltd.
In some embodiments, the curing agent (B) comprises at least one amino resin. Preferably, the amino resin is at least one of CYMEL 370N, CYMEL 303, CYMEL 325, CYMEL 250, etc. brand products of cyanogen specialization chemical (shanghai) ltd.
In some embodiments, the solvent (C) further comprises pure water having an electric conductivity of 2 μ s/cm or less, and the pure water is 20 to 30% by mass in the aqueous coating composition.
In some embodiments, the solvent (C) further comprises at least one component selected from the group consisting of ethylene glycol isooctyl ether, ethylene glycol butyl ether, isopropyl alcohol, diethylene glycol butyl ether, ethylene glycol monoethyl ether acetate, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol isopropyl ether, isoparaffin. Preferably, the isoparaffin is such as, but not limited to, shell brand TK brand product.
In some embodiments, the auxiliary (D) further comprises at least one of a leveling agent, an antifoaming agent, a wetting dispersant, a surfactant, and a pH adjuster.
Preferably, the leveling agent is a silicon-containing or silicone-free auxiliary agent or a polyether product suitable for water-based coatings. Such as, but not limited to, at least one of BYK-345, BYK-307, BYK-333, BYK-346, and the like, available from BYK-assistant (shanghai), inc.
Preferably, the defoaming agent is a defoaming agent suitable for the waterborne system coating or an auxiliary agent with a foam inhibiting effect, an auxiliary agent containing silicon or no organic silicon, or a polyether product. Such as, but not limited to, at least one of BYK-011, BYK-012, BYK-014, BYK-016, BYK-017, BYK-018, BYKETOL-WS, BYKETOL-WA, etc. brand products of Pico-co (Shanghai) Ltd.
Preferably, the wetting and dispersing agent is a wetting and dispersing assistant suitable for water-based paint or water-oil universal type. Such as, but not limited to, at least one of DISPERBYK-2055, DISPERBYK-171DISPERBYK-174, DISPERBYK-180, DISPERBYK-181, DISPERBYK-182, and the like, manufactured by Biako co (Shanghai) Co., ltd.
Preferably, the surfactant is a surfactant capable of passivating and coating the surface of the effect pigment and filler (such as aluminum powder and the like) in the water-based paint, such as but not limited to at least one of SURFYNOL 440, SURFYNOL 420, SURFYNOL 465, SURFYNOL 485 and other brands of air products of chemical products ltd.
Preferably, the pH regulator is an amine product for adjusting the pH of the water-based paint, and includes organic amine, organic ammonium salt and various solutions prepared by using the same. Such as but not limited to a10% dimethylethanolamine solution (DMEA 10% solution).
In some embodiments, the aqueous coating composition has a pH of 8.0 to 8.5; and has a viscosity of 2000 to 4000 at 25 ℃ and 6rpm as measured with a B-type viscometer. The viscosity of the aqueous coating composition at 25 ℃ and 60rpm as measured by a B-type viscometer is 500 to 700.
In the aqueous coating composition of the present invention, by selecting a specific combination of thickeners and adjusting the amounts of various thickeners and isooctyl alcohol therein, the storage stability of the aqueous coating composition can be effectively controlled and the appearance of the system can be effectively improved. Therefore, the water-based coating composition can solve the problem of viscosity increasing or viscosity reducing of the water-based coating for the automobile in storage.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Example 1 aqueous coating composition 1
In this example, an aqueous coating composition 1 is provided comprising, in mass percent:
specifically, in this example, the specific formulation of the aqueous coating composition 1 is shown in table 1.
TABLE 1 formulation of aqueous coating composition 1
| Reagent | Parts by weight (parts) |
| ACS-1016 | 4.00 |
| ACW-1011 | 7.00 |
| AR-2000(T)BF-20PASTE(W/O RESIN)UDP | 11.67 |
| AR-2000(T)EMPEROR BLACK KAI UDP | 37.60 |
| BYK-345 | 1.00 |
| BYKETOL–WS | 10.00 |
| CTMEL 370N | 24.68 |
| CYMEL 250 | 26.20 |
| Disparlon AQ-630 | 9.36 |
| DMEA10% solution | 11.77 |
| EMA-1015S | 82.00 |
| EMA-1032RESIN | 16.66 |
| PRS-1045RESIN | 18.72 |
| PZW-1001 | 33.30 |
| Rheovis AS 1130 | 1.06 |
| SURFYNOL 440 | 15.00 |
| UCOAT N-800 | 5.96 |
| XIRALLIC F60-51WNT RADIANT RED | 1.50 |
| Pure water | 108.09 |
| Ethylene glycol isooctaneEther compounds | 30.00 |
| Isooctyl alcohol | 2.00 |
The specific preparation method of the water-based coating composition 1 comprises the following steps:
step 1: preparation of the Dispersion
With stirring, 23 parts by weight of purified water was added, 0.5 parts by weight of DMEA10% solution was added, 11 parts by weight of Disparlon AQ-630 were added, and stirring was carried out at high speed for 1-2 hours until Disparlon AQ-630 was completely premixed in the aqueous phase. Then, 7 parts by weight of UCOAT N-800 was added, 29 parts by weight of CYMEL 370N was added after 5 minutes, 0.6 part by weight of Rheovis AS1130 was added after 5 minutes of stirring, 10 parts by weight of pure water and 0.4 part by weight of DMEA10% solution were added after twenty minutes of stirring, 22 parts by weight of PRS-1045RESIN and 14 parts by weight of CYMEL 250 (amino RESIN) from Cyanites chemical (Shanghai) Co., ltd were added after 5 minutes of stirring, and the mixture was left to stand for use after 30 minutes of stirring.
And 2, step: preparation of an aqueous coating composition 1
Adding 100 parts by weight of the dispersion liquid obtained in the step 1 into a tank A, stirring for 5 minutes, then sequentially adding 14.29 parts by weight of CYMEL 250, 11 parts by weight of DMEA10% solution, 16.66 parts by weight of EMA-1032RESIN, 82 parts by weight of EMA-1015S, 7 parts by weight of ACW-1011, 11.67 parts by weight of AR-2000 (T) BF-20PASTE (W/O RESIN) UDP and 37.6 parts by weight of AR-2000 (T) EMPER BLACK KAI UDP, stirring for 5 minutes after each material is added, then carrying out the next feeding, and stirring for 30 minutes after the feeding is finished.
Using a pot B, 20 parts by weight of ethylene glycol isooctyl ether, 1.5 parts by weight of XIRALLIC F60-51WNT RADIANT RED, 4 parts by weight of ACS-1016, 15 parts by weight of SURFYNOL 440, and 1 part by weight of BYK-345 were sequentially added, and after stirring uniformly, the mixture was added to a pot A and stirred for 30 minutes. Then, 80 parts by weight of pure water, 33.3 parts by weight of PZW-1001, 10 parts by weight of BYKETOL-WS, 10 parts by weight of ethylene glycol isooctyl ether, and 2 parts by weight of isooctanol were added in this order, and after stirring for 10 minutes, 0.55 part of Rheovis AS1130 was added to tank A, and after stirring for 8 hours, the pH and viscosity were adjusted using pure water and a10% DMEA solution so that the pH of the aqueous coating composition 1 was 8.0 to 8.5, the viscosity at 25 ℃, 6rpm was 2000 to 3000, and the viscosity at 60rpm was 500 to 700 AS measured with a spindle 3 type viscometer B.
It should be noted that: the formulation of the present aqueous coating composition 1 includes isooctanol as a solvent and also contains the compounded thickener of the present invention, which includes polyamide thickener and alkali swellable thickener.
Example 2 aqueous coating composition 2
In this example, an aqueous coating composition 2 is provided comprising, in mass percent:
specifically, in this example, the specific formulation of the aqueous coating composition 2 is shown in table 2.
TABLE 2 formulation of aqueous coating composition 2
| Reagent | Parts by weight (parts) |
| ACS-1016 | 4.00 |
| ACW-1011 | 7.00 |
| ADEKANOL UH-814N | 0.20 |
| AR-2000(T)BF-20PASTE(W/O RESIN)UDP | 11.67 |
| AR-2000(T)EMPEROR BLACK KAI UDP | 37.60 |
| BYK-345 | 1.00 |
| BYKETOL–WS | 10.00 |
| CTMEL 370N | 24.68 |
| CYMEL 250 | 26.20 |
| Disparlon AQ-630 | 9.36 |
| DMEA10% solution | 11.77 |
| EMA-1015S | 82.00 |
| EMA-1032RESIN | 16.66 |
| PRS-1045RESIN | 18.72 |
| PZW-1001 | 33.30 |
| Rheovis AS 1130 | 0.81 |
| SURFYNOL 440 | 15.00 |
| UCOAT N-800 | 5.96 |
| XIRALLIC F60-51WNT RADIANT RED | 1.50 |
| Pure water | 108.09 |
| Ethylene glycol isooctyl ether | 20.00 |
| Isooctyl alcohol | 2.00 |
The specific preparation method of the water-based paint composition 2 comprises the following steps:
step 1: preparation of the Dispersion
With stirring, 23 parts by weight of purified water was added, 0.5 parts by weight of DMEA10% solution was added, 11 parts by weight of Disparlon AQ-630 was added and stirred at high speed for 1-2 hours until Disparlon AQ-630 was completely premixed in the aqueous phase. Then, 7 parts by weight of UCOAT N-800 was added, 29 parts by weight of CYMEL 370N was added after 5 minutes, 0.6 part by weight of Rheovis AS1130 was added after 5 minutes of stirring, 10 parts by weight of pure water and 0.4 part by weight of DMEA10% solution were added after twenty minutes of stirring, 22 parts by weight of PRS-1045RESIN and 14 parts by weight of CYMEL 250 (amino RESIN) from Cyanites chemical (Shanghai) Co., ltd were added after 5 minutes of stirring, and the mixture was left to stand for use after 30 minutes of stirring.
Step 2: preparation of an aqueous coating composition 2
Adding 100 parts by weight of the dispersion liquid obtained in the step 1 into a tank A, stirring for 5 minutes, then sequentially adding 14.29 parts by weight of CYMEL 250, 11 parts by weight of DMEA10% solution, 16.66 parts by weight of EMA-1032RESIN, 82 parts by weight of EMA-1015S, 7 parts by weight of ACW-1011, 11.67 parts by weight of AR-2000 (T) BF-20PASTE (W/O RESIN) UDP and 37.6 parts by weight of AR-2000 (T) EMPER BLACK KAI UDP, stirring for 5 minutes after each material is added, then carrying out the next feeding, and stirring for 30 minutes after the feeding is finished.
Using a pot B, 20 parts by weight of ethylene glycol isooctyl ether, 1.5 parts by weight of XIRALLIC F60-51WNT RADIANT RED, 4 parts by weight of ACS-1016, 15 parts by weight of SURFYNOL 440, and 1 part by weight of BYK-345 were sequentially added, and after stirring uniformly, the mixture was added to a pot A and stirred for 30 minutes. Then, 80 parts by weight of pure water, 33.3 parts by weight of PZW-1001, 10 parts by weight of BYKETOL-WS and 2 parts by weight of isooctanol were added in this order, and after stirring for 10 minutes, 0.3 part by weight of Rheovis AS1130 was added to tank A, and after stirring for 30 minutes, 0.2 part by weight of ADEKANOL UH-814N was added, and after stirring for 8 hours, the pH and viscosity were adjusted using pure water and a10% solution of DMEA so that the pH of the aqueous coating composition 2 became 8.0 to 8.5, and the viscosity at 25 ℃, 6rpm and 60rpm, measured with a spindle No. 3 viscometer of type B, was 2000 to 3000, and the viscosity at 60rpm became 500 to 700.
It should be noted that: the formulation of the aqueous coating composition 2 includes both isooctanol as a solvent and the compounded thickener of the present invention, which includes a polyurethane thickener, a polyamide thickener, and an alkali swellable thickener.
Example 3 aqueous coating composition 3
In this example, an aqueous coating composition 3 is provided comprising, in mass percent:
specifically, in this example, the specific formulation of the aqueous coating composition 3 is shown in table 3.
TABLE 3 formulation of waterborne coating composition 3
| Reagent | Parts by weight (parts) |
| ACS-1016 | 4.00 |
| ACW-1011 | 7.00 |
| ADEKANOL UH-814N | 0.20 |
| AR-2000(T)BF-20PASTE(W/O RESIN)UDP | 11.67 |
| AR-2000(T)EMPEROR BLACK KAI UDP | 37.60 |
| BYK-345 | 1.00 |
| BYKETOL–WS | 10.00 |
| CTMEL 370N | 24.68 |
| CYMEL 250 | 26.20 |
| Disparlon AQ-630 | 9.36 |
| DMEA10% solution | 11.77 |
| EMA-1015S | 82.00 |
| EMA-1032RESIN | 16.66 |
| PRS-1045RESIN | 18.72 |
| PZW-1001 | 33.30 |
| Rheovis AS 1130 | 0.81 |
| SURFYNOL 440 | 15.00 |
| UCOAT N-800 | 5.96 |
| XIRALLIC F60-51WNT RADIANT RED | 1.50 |
| Pure water | 108.09 |
| Ethylene glycol isooctyl ether | 20.00 |
| Isooctyl alcohol | 4.00 |
The specific preparation method of the water-based coating composition 3 comprises the following steps:
step 1: preparation of the Dispersion
With stirring, 23 parts by weight of purified water was added, 0.5 parts by weight of DMEA10% solution was added, 11 parts by weight of Disparlon AQ-630 was added and stirred at high speed for 1-2 hours until Disparlon AQ-630 was completely premixed in the aqueous phase. Then, 7 parts by weight of UCOAT N-800 was added, 29 parts by weight of CYMEL 370N was added after 5 minutes, 0.6 part by weight of Rheovis AS1130 was added after 5 minutes of stirring, 10 parts by weight of pure water and 0.4 part by weight of DMEA10% solution were added after twenty minutes of stirring, 22 parts by weight of PRS-1045RESIN and 14 parts by weight of CYMEL 250 (amino RESIN) from Cyanites chemical (Shanghai) Co., ltd were added after 5 minutes of stirring, and the mixture was left to stand for use after 30 minutes of stirring.
And 2, step: preparation of an aqueous coating composition 3
Adding 100 parts by weight of the dispersion obtained in the step 1 into a tank A, stirring for 5 minutes, then sequentially adding 14.29 parts by weight of CYMEL 250, 11 parts by weight of DMEA10% solution, 16.66 parts by weight of EMA-1032RESIN, 82 parts by weight of EMA-1015S, 7 parts by weight of ACW-1011, 11.67 parts by weight of AR-2000 (T) BF-20PASTE (W/O RESIN) UDP and 37.6 parts by weight of AR-2000 (T) EMPERORACK KAI UDP, stirring for 5 minutes after adding one material, then carrying out next feeding, and stirring for 30 minutes after feeding.
Using tank B, 20 parts by weight of isooctyl ether glycol, 1.5 parts by weight of XIRALLIC F60-51WNT RADIATION RED, 4 parts by weight of ACS-1016, 15 parts by weight of SURFYNOL 440, and 1 part by weight of BYK-345 were added in this order, and after stirring uniformly, they were added to tank A and stirred for 30 minutes. Then, 80 parts by weight of pure water, 33.3 parts by weight of PZW-1001, 10 parts by weight of BYKETOL-WS and 4 parts by weight of isooctanol were added in this order, and after stirring for 10 minutes, 0.3 part by weight of Rheovis AS1130 was added to tank A, and after stirring for 30 minutes, 0.2 part by weight of ADEKANOL UH-814N was added, and after stirring for 8 hours, the pH and viscosity were adjusted using pure water and a10% solution of DMEA so that the pH of the aqueous coating composition 2 became 8.0 to 8.5, and the viscosity at 25 ℃, 6rpm and 60rpm AS measured with a model B viscometer No. 3 spindle was 2000 to 3000, and the viscosity at 60rpm was 500 to 700.
It should be noted that: the formulation of the aqueous coating composition 3 includes both isooctanol as a solvent and the compounded thickener of the present invention, which includes a polyurethane thickener, a polyamide thickener, and an alkali swellable thickener.
Example 4 waterborne coating composition 4
In this example, an aqueous coating composition 4 is provided comprising, in mass percent:
specifically, in this example, the specific formulation of the aqueous coating composition 4 is shown in table 4.
TABLE 4 formulation of waterborne coating composition 4
The specific preparation method of the water-based paint composition 4 comprises the following steps:
step 1: preparation of the Dispersion
With stirring, 23 parts by weight of purified water was added, 0.5 parts by weight of DMEA10% solution was added, 11 parts by weight of Disparlon AQ-630 was added and stirred at high speed for 1-2 hours until Disparlon AQ-630 was completely premixed in the aqueous phase. Then, 7 parts by weight of UCOAT N-800 was added, 29 parts by weight of CYMEL 370N was added after 5 minutes, 0.6 part by weight of Rheovis AS1130 was added after 5 minutes of stirring, 10 parts by weight of pure water and 0.4 part by weight of DMEA10% solution were added after twenty minutes of stirring, 22 parts by weight of PRS-1045RESIN and 14 parts by weight of CYMEL 250 (amino RESIN) from Cyanites chemical (Shanghai) Co., ltd were added after 5 minutes of stirring, and the mixture was left to stand for use after 30 minutes of stirring.
And 2, step: preparation of an aqueous coating composition 4
Adding 120 parts by weight of the dispersion liquid obtained in the step 1 into a tank A, stirring for 5 minutes, then sequentially adding 17 parts by weight of CYMEL 250, 11 parts by weight of DMEA10% solution, 35 parts by weight of EMA-1036RESIN, 20 parts by weight of EMA-1032RESIN, 50 parts by weight of EMA-1015S, 10 parts by weight of ACW-1011, 11.4 parts by weight of AR-2000 (T) BF-20PASTE (W/O RESIN) UDP, 5.2 parts by weight of AR-2000 (T) EMPER BLACK KAI UDP and 3.11 parts by weight of AR-2000 (T) RED 400, stirring for 5 minutes after each material is added, then feeding in the next step, and stirring for 30 minutes after feeding is finished.
Using pot B, 25 parts by weight of ethylene glycol isooctyl ether, 9.11 parts by weight of ASAHI-KASEI ALUMINIUM PASTE CP-315, 10 parts by weight of ALUMINIUM PASTE 06-0672N, 7.91 parts by weight of ACS-1212, 15 parts by weight of SURFYNOL 440, and 1 part by weight of BYK-347 were added in this order, and after stirring uniformly, they were stirred in pot A for 30 minutes. Then, 100 parts by weight of pure water, 10 parts by weight of SHELLSOL TK, 10 parts by weight of ethyleneglycol isooctanol, and 2 parts by weight of isooctanol were added in this order, and after stirring for 10 minutes, 0.5 part of (ACRYSOL) was added TM ) ASE-60, stirring for 8 hours, and then adjusting the pH and viscosity of the aqueous coating composition 4 using pure water and a10% DMEA solution so that the pH is 8.0 to 8.5, the viscosity at 25 ℃, 6rpm is 3000 to 4000, and the viscosity at 60rpm is 500 to 700 as measured by a B-type viscometer, spindle No. 3.
It should be noted that: the formulation of the aqueous coating composition 4 includes both isooctanol as a solvent and the compounded thickener of the present invention, which includes an alkali swellable thickener and a polyamide thickener.
Example 5 aqueous coating composition 5
In this example, an aqueous coating composition 5 is provided comprising, in mass percent:
specifically, in this example, the specific formulation of the aqueous coating composition 4 is shown in table 5.
TABLE 5 formulation of aqueous coating composition 5
The specific preparation method of the water-based coating composition 5 comprises the following steps:
step 1: preparation of the Dispersion
With stirring, 23 parts by weight of purified water was added, 0.5 parts by weight of DMEA10% solution was added, 11 parts by weight of Disparlon AQ-630 was added and stirred at high speed for 1-2 hours until Disparlon AQ-630 was completely premixed in the aqueous phase. Then, 7 parts by weight of UCOAT N-800 was added, 29 parts by weight of CYMEL 370N was added after 5 minutes of stirring, 0.6 part by weight of Rheovis AS1130 was added after twenty minutes of stirring, 10 parts by weight of pure water and 0.4 part by weight of a10% solution of DMEA were added, 22 parts by weight of PRS-1045RESIN and 14 parts by weight of CYMEL 250 (amino RESIN) from CyanoTechnology (Shanghai) Co., ltd were added after 5 minutes of stirring, and left to stand for use after 30 minutes of stirring.
Step 2: preparation of an aqueous coating composition 5
Adding 120 parts by weight of the dispersion liquid obtained in the step 1 into a tank A, stirring for 5 minutes, then sequentially adding 17 parts by weight of CYMEL 250, 11 parts by weight of DMEA10% solution, 35 parts by weight of EMA-1036RESIN, 20 parts by weight of EMA-1032RESIN, 50 parts by weight of EMA-1015S, 10 parts by weight of ACW-1011, 11.4 parts by weight of AR-2000 (T) BF-20PASTE (W/O RESIN) UDP, 5.2 parts by weight of AR-2000 (T) EMPER BLACK KAI UDP and 3.11 parts by weight of AR-2000 (T) RED 400, stirring for 5 minutes after each material is added, then feeding in the next step, and stirring for 30 minutes after feeding is finished.
Using a pot B, 25 parts by weight of ethylene glycol isooctyl ether, 9.11 parts by weight of ASAHI-KASEI ALUMINIUM PASTE CP-315, 10 parts by weight of ALUMINIUM PASTE 06-0672N, 7.91 parts by weight of ACS-1212, 15 parts by weight of SURFYNOL 440, and 1 part by weight of BYK-347 were added in this order, and after stirring uniformly, the mixture was stirred in a pot A for 30 minutes. Then, 100 parts by weight of pure water, 10 parts by weight of SHELLSOL TK, 10 parts by weight of ethyleneglycol isooctanol, and 4 parts by weight of isooctanol were added in this order, and after stirring for 10 minutes, 0.5 part of (ACRYSOL) was added TM ) ASE-60, stirring for 8 hours, and then adjusting the pH and viscosity using pure water and a10% DMEA solution such that the pH of the aqueous coating composition 5 is 8.0 to 8.5, the viscosity at 25 ℃, 6rpm is 3000 to 4000, and the viscosity at 60rpm is 500 to 700 as measured with a B-type viscometer, spindle No. 3.
It should be noted that: the formulation of the aqueous coating composition 5 includes both isooctanol as a solvent and the compounded thickener of the present invention, which includes an alkali swellable thickener and a polyamide thickener.
Example 6 aqueous coating composition 6
In this example, an aqueous coating composition 6 is provided comprising, in mass percent:
specifically, in this example, the specific formulation of the aqueous coating composition 6 is shown in table 6.
TABLE 6 formulation of waterborne coating composition 6
The specific preparation method of the water-based coating composition 6 comprises the following steps:
step 1: preparation of the Dispersion
With stirring, 23 parts by weight of purified water was added, 0.5 parts by weight of DMEA10% solution was added, 11 parts by weight of Disparlon AQ-630 was added and stirred at high speed for 1-2 hours until Disparlon AQ-630 was completely premixed in the aqueous phase. Then, 7 parts by weight of UCOAT N-800 was added, 29 parts by weight of CYMEL 370N was added after 5 minutes, 0.6 part by weight of Rheovis AS1130 was added after 5 minutes of stirring, 10 parts by weight of pure water and 0.4 part by weight of DMEA10% solution were added after twenty minutes of stirring, 22 parts by weight of PRS-1045RESIN and 14 parts by weight of CYMEL 250 (amino RESIN) from Cyanites chemical (Shanghai) Co., ltd were added after 5 minutes of stirring, and the mixture was left to stand for use after 30 minutes of stirring.
And 2, step: preparation of an aqueous coating composition 6
Adding 120 parts by weight of the dispersion liquid obtained in the step 1 into a tank A, stirring for 5 minutes, then sequentially adding 17 parts by weight of CYMEL 250, 11 parts by weight of DMEA10% solution, 35 parts by weight of EMA-1036RESIN, 20 parts by weight of EMA-1032RESIN, 50 parts by weight of EMA-1015S, 10 parts by weight of ACW-1011, 11.4 parts by weight of AR-2000 (T) BF-20PASTE (W/O RESIN) UDP, 5.2 parts by weight of AR-2000 (T) EMPER BLACK KAI UDP and 3.11 parts by weight of AR-2000 (T) RED 400, stirring for 5 minutes after each material is added, then feeding in the next step, and stirring for 30 minutes after feeding is finished.
Using a pot B, 25 parts by weight of ethylene glycol isooctyl ether, 9.11 parts by weight of ASAHI-KASEI ALUMINIUM PASTE CP-315, 10 parts by weight of ALUMINIUM PASTE 06-0672N, 7.91 parts by weight of ACS-1212, 15 parts by weight of SURFYNOL 440, and 1 part by weight of BYK-347 were added in this order, and after stirring uniformly, the mixture was stirred in a pot A for 30 minutes. Then, 100 parts by weight of pure water, 10 parts by weight of SHELLSOL TK, and 2 parts by weight of isooctanol were added in this order, and after stirring for 10 minutes, 0.3 part by weight of Rheovis AS1130 was added, followed by stirring for 30 minutes, then 0.2 part by weight of ADEKANOL UH-814N was added, and after stirring for 8 hours, pH and viscosity were adjusted using pure water and a10% DMEA solution so that the pH of the aqueous coating composition 6 became 8.0 to 8.5, and the viscosity at 25 ℃, 6rpm and 60rpm, measured with a spindle of a B-type viscometer No. 3, became 3000 to 4000, and became 500 to 700.
It should be noted that: the formulation of the aqueous coating composition 6 includes both isooctanol as a solvent and the compounded thickener of the present invention, which includes a polyurethane thickener, a polyamide thickener, and an alkali swellable thickener.
Comparative examples 1 to 4
Comparative example 1 was prepared by removing 2 parts by weight of isooctanol from the formulation of the aqueous coating composition 1 of example 1 without any change in other components;
comparative example 2 was prepared by removing 2 parts by weight of isooctanol from the formulation of the aqueous coating composition 2 of example 2, without any change in the other components;
comparative example 3 was a formulation of the aqueous coating composition 4 of example 4 in which 2 parts by weight of isooctanol was removed and the other components were not changed at all;
comparative example 4 was conducted by removing 2 parts by weight of isooctanol from the formulation of the aqueous coating composition 6 of example 6 without any change of other components.
Verification example
Viscosity testing of aqueous coating compositions
To test the performance of the aqueous coating compositions of the present invention, the viscosities of the aqueous coating compositions of examples 1-6 and comparative examples 1-4 above were measured with a Brookfield viscometer and an Anton paar rheometer, respectively.
Full coating structural testing of black waterborne paint compositions
In addition, in order to test the application performance of the aqueous coating composition in the coating, toyota field electrophoresis plates (roughness Ra = 0.3-0.35) are used as a substrate, an intermediate coating is formed by using AR-620 8110 black aqueous intermediate coating manufactured by Nippon, a black colored coating is formed by using the aqueous coating compositions of the above-mentioned examples 1-3 and comparative examples 1-2, a clear coating is formed by using MAC O-1860 finishing varnish manufactured by Nippon, and then the leveling property and the constant-short wave of the full coating are measured by using a BYK Mini orange peel AW-4840.
Full coating structural testing of silver waterborne paint compositions
The Toyota field electrophoresis plate (roughness Ra = 0.3-0.35) is used as a substrate, an AR-620 8115 gray water-based intermediate coating self-made by Nippon is used for forming an intermediate coating, a silver paint layer is formed by the water-based paint composition of the above examples 4-6 and the comparative examples 3-4, a clear paint layer is formed by MAC O-1860 finishing varnish self-made by Nippon for obtaining a full coating structure, and then the leveling property and the constant-short wave of the full coating are measured by a BYK mini orange peel instrument AW-4840.
The results of testing the aqueous colored paint compositions of examples 1 to 3 and comparative examples 1 to 2 are shown in Table 7-1.
TABLE 7-1 test results of the aqueous colored paint compositions of examples 1 to 3 and comparative examples 1 to 2
The aqueous coating composition of comparative example 1 contained only formulated two-component thickeners (polyamide thickeners and alkali swellable thickeners) but no 2 parts of isooctanol.
The aqueous coating composition described in comparative example 2 contained only formulated three-component thickeners (polyurethane thickener, polyamide thickener, and alkali swellable thickener) but no 2 parts of isooctanol.
The aqueous coating composition described in example 1 contained 2 parts of isooctanol and also a built two-component thickener (polyurethane thickener and alkali swellable thickener).
The aqueous coating composition described in example 2 contained 2 parts of isooctanol and also a built three-component thickener (polyurethane thickener, polyamide thickener, and alkali swellable thickener).
The aqueous coating composition described in example 3 contained 4 parts of isooctanol and also a built three-component thickener (polyurethane thickener, polyamide thickener, and alkali swellable thickener).
As can be seen from the above Table 7-1, the storage stability of the aqueous coating compositions of the present invention (examples 1-3) and the corresponding full-coating appearance are preferred. Among these, the storage stability of the aqueous coating compositions described in examples 2 to 3 and the corresponding full-coat appearance are optimal.
In addition, as can be seen from Table 7-1, by comparing comparative example 1 with example 1: the addition of isooctanol can delay the increase of viscosity to a certain extent, and the addition of isooctanol can effectively prevent the crosslinking effect of amino resin in the storage process on the one hand, and on the other hand, in the storage process, isooctanol is similar to the effect of an emulsifier, and the hydrophilic and lipophilic effects at two ends are used for disentangling a part of molecular chain winding to cause viscosity reduction. However, the addition of isooctanol alone is not optimal.
As can be seen by comparing comparative example 1 with comparative example 2: after the compounded thickening agent (polyurethane thickening agent, polyamide thickening agent and alkali swelling thickening agent) is simply added, the storage viscosity is basically not influenced, even more serious, but the appearance is obviously improved. This is because in comparative example 2, the thickening mechanism is different in that part of the alkali-swellable thickener Rheovis AS1130 is replaced with the polyurethane thickener ADEKANOL UH-814N, the alkali-swellable thickener Rheovis AS1130 is the viscosity increase caused by entanglement of the molecular chain, and the polyurethane thickener ADEKANOL UH-814N is the viscosity increase caused by association. Therefore, after a paint film is sprayed and prebaked at the temperature of 80 ℃, the association of the polyurethane thickener ADEKANOL UH-814N is broken along with the rise of temperature, so that the viscosity rises more slowly than that of the alkali swelling thickener Rheovis AS1130, and the leveling property is better and the appearance is better. However, the effect of adding the thickener alone (even if the added thickener is compounded) is not optimal.
As can be seen by comparing comparative example 1, comparative example 2 and example 2, the simultaneous addition of the formulated thickener (particularly the polyurethane thickener ADEKANOL UH-814N therein) and isooctanol had a significant inhibitory effect on the storage adhesion of the aqueous coating composition, because: in addition to the action of isooctanol, when added to the polyurethane thickener ADEKANOL UH-814N, isooctanol also disrupts the point of association of the polyurethane thickener ADEKANOL UH-814N in part during storage of the aqueous coating composition, and the apparent viscosity is substantially unchanged or even reduced.
Further, as described above, the aqueous coating composition according to comparative example 2 does not contain isooctanol. The aqueous coating compositions described in examples 2 and 3 contained 2 parts and 4 parts of isooctanol, respectively. Accordingly, as can be seen by comparing comparative example 2, example 2 and example 3, the thickening effect of isooctanol on the system is not linear, and the effect is more obvious at the beginning, but is less obvious with the increase of the addition amount. From this, it can be further explained that the effect of adding isooctanol alone is not optimal.
The results of testing the aqueous colored paint compositions of examples 4 to 6 and comparative examples 3 to 4 are shown in Table 7-2.
TABLE 7-2 test results of the aqueous colored paint compositions of examples 4 to 6 and comparative examples 3 to 4
The aqueous coating composition described in comparative example 3 contains only formulated two-component thickeners (polyamide thickener and alkali swellable thickener) but no 2 parts of isooctanol.
The aqueous coating composition of comparative example 4 contained only three-component built thickeners (polyurethane thickener, polyamide thickener, and alkali swellable thickener) but did not contain 2 parts of isooctanol.
The aqueous coating composition described in example 4 contains 2 parts of isooctanol and also a two-component built thickener (polyamide thickener and alkali swellable thickener).
The aqueous coating composition described in example 5 contained 4 parts of isooctanol and also a two-component built thickener (polyamide thickener and alkali swellable thickener).
The aqueous coating composition described in example 6 contained 2 parts of isooctanol and also a three-component built thickener (polyurethane thickener, polyamide thickener, and alkali swellable thickener).
Similarly, from the above Table 7-2, it can be seen that the storage stability of the aqueous coating compositions of the present invention (examples 4-6) and the corresponding full coating appearance are optimal. Among these, the storage stability of the aqueous coating composition described in example 6 and the corresponding full-coat appearance are optimal.
Furthermore, from a longitudinal comparison of Table 7-1 with Table 7-2, it can be seen that: the experimental results in the silver paint are substantially identical to those in the black paint. Accordingly, it can be seen that the aqueous coating composition of the present invention can be applied to different paint systems.
In summary, the following steps: the aqueous coating composition of the present invention can effectively control the storage stability of the coating composition and can effectively improve the appearance of the system by using the alkali-swellable thickener together with isooctyl alcohol and adjusting the amount thereof.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and not exhaustive enumeration of all embodiments, and obvious variations and modifications can be made without departing from the scope of the present invention.
Claims (10)
1. A high storage stability aqueous coating composition comprising a film-forming resin (A), a curing agent (B), a solvent (C) and an auxiliary agent (D), characterized in that:
the solvent (C) comprises isooctanol and the adjuvant (D) comprises a rheology adjuvant comprising a thickener, wherein the thickener is selected from the group consisting of polyurethane thickeners, polyamide thickeners, and alkali swellable thickeners in combination of at least two thereof.
2. The aqueous coating composition according to claim 1, wherein the mass percentage of isooctyl alcohol in the aqueous coating composition is in the range of 0.10% to 4.00%; the mass percentage of the thickening agent is 2.00-3.04%.
3. The aqueous coating composition of claim 1, wherein the thickener is selected from the group consisting of polyamide thickeners and alkali swellable thickeners; preferably, the mass percent of the polyamide thickening agent ranges from 2.00% to 2.60%, and the mass percent of the alkali swelling thickening agent ranges from 0.15% to 0.25%.
4. The aqueous coating composition of claim 1, wherein the thickener is selected from the group consisting of polyurethane thickeners, polyamide thickeners, and alkali swellable thickeners; preferably, in the aqueous coating composition, the weight percentage of the polyurethane thickener is in the range of 0.02% -0.04%, the weight percentage of the polyamide thickener is in the range of 2.05% -2.50%, and the weight percentage of the alkali swelling thickener is in the range of 0.15-0.5%.
5. An aqueous coating composition according to claim 1, characterized in that in the aqueous coating composition the film-forming resin (a) comprises: at least one water-soluble acrylic resin (A1), at least one acrylic resin emulsion (A2) and at least one polyester resin emulsion (A3); preferably, the polyester resin emulsion (A3) is an aqueous polyurethane emulsion.
6. The aqueous coating composition of claim 1, wherein the curing agent (B) comprises at least one amino resin.
7. The aqueous coating composition according to claim 1, wherein the solvent (C) further comprises pure water and at least one component selected from the group consisting of ethylene glycol isooctyl ether, ethylene glycol butyl ether, isopropyl alcohol, diethylene glycol butyl ether, ethylene glycol monoethyl ether acetate, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol isopropyl ether, isoparaffin.
8. The aqueous coating composition according to claim 1, wherein the auxiliary (D) further comprises at least one of a leveling agent, an antifoaming agent, a wetting dispersant, a surfactant, and a pH adjuster.
9. The aqueous coating composition of claim 1, further comprising a pigment filler (E).
10. The aqueous coating composition according to any one of claims 1 to 10, wherein the aqueous coating composition has a pH of 8.0 to 8.5; and has a viscosity at 25 ℃ and 6rpm of 2000 to 4000 as measured with a B-type viscometer.
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