CN115141535A - Water-based polyester coil aluminum coating and preparation method thereof - Google Patents
Water-based polyester coil aluminum coating and preparation method thereof Download PDFInfo
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- CN115141535A CN115141535A CN202210708720.8A CN202210708720A CN115141535A CN 115141535 A CN115141535 A CN 115141535A CN 202210708720 A CN202210708720 A CN 202210708720A CN 115141535 A CN115141535 A CN 115141535A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 229920000728 polyester Polymers 0.000 title claims abstract description 52
- 238000000576 coating method Methods 0.000 title claims abstract description 36
- 239000011248 coating agent Substances 0.000 title claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003973 paint Substances 0.000 claims abstract description 34
- 229920003180 amino resin Polymers 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- 239000000080 wetting agent Substances 0.000 claims abstract description 20
- 239000003377 acid catalyst Substances 0.000 claims abstract description 19
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 19
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 18
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 16
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 15
- 239000004593 Epoxy Substances 0.000 claims abstract description 12
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 12
- 239000010452 phosphate Substances 0.000 claims abstract description 12
- 239000008367 deionised water Substances 0.000 claims abstract description 11
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 18
- 230000003678 scratch resistant effect Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 9
- 239000004408 titanium dioxide Substances 0.000 claims description 9
- 239000000049 pigment Substances 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 6
- 239000013530 defoamer Substances 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical group CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims 1
- 229920003274 CYMEL® 303 LF Polymers 0.000 claims 1
- 230000002378 acidificating effect Effects 0.000 claims 1
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 239000003054 catalyst Substances 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002023 wood Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 238000004383 yellowing 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of water-based paint, and provides a water-based polyester aluminum coil paint and a preparation method thereof, which solve the defects of non-scratch resistance, poor hardness, poor adhesion, non-MEK resistance and the like of the existing water-based polyester paint, and further limit the practical application of the existing water-based polyester paint in certain specific fields, and specifically discloses a water-based polyester aluminum coil paint and a preparation method thereof, wherein the water-based polyester aluminum coil paint comprises the following raw materials, by weight, 20-30 parts of water-based polyester, 2-5 parts of high methylated amino resin, 5-15 parts of deionized water, 1-3 parts of PH regulator, 2-5 parts of epoxy phosphate, 10-20 parts of film forming auxiliary agent, 0.3-0.5 part of wetting agent, 0.2-0.5 part of defoaming agent, 0.3-0.5 part of flatting agent, 0.5-1 part of dispersing agent, 0.5-1 part of scratch resistance auxiliary agent, 2-5 parts of polytetrafluoroethylene wax slurry, 2-5 parts of matting powder and 0.1-0.5 part of acid catalyst; ensures the characteristics of scratch resistance, flexibility, impact resistance, adhesive force, MEK resistance and the like of the water-based polyester coating.
Description
Technical Field
The invention relates to the technical field of water-based paint, in particular to water-based polyester aluminum coil paint and a preparation method thereof.
Background
In the 21 st century, water-based paint mainly uses water to replace organic solvent to dilute resin pigment, filler and auxiliary agent, and has the advantages of low content of toxic substances such as xylene, styrene and the like, no pungent smell, no flammability and no environmental pollution [1]. The research on the water paint with low Volatile Organic Compound (VOC) emission is carried out with the aim of reducing negative earth negative drugs. Is becoming the focus and hot spot of the development of water-based paint in the future. However, the aqueous coating has many disadvantages due to its late appearance. As the performance of the water-based wood coating is partially inferior to that of the solvent-based wood coating, the performance of the water-based wood coating still needs to be continuously researched and developed by wood coating enterprises at home and abroad to overcome the problem and promote the environmental protection of the wood coating. The water-based paint is changed to be used, the treatment of a coating line is carried out, but the water-based paint is used for modifying the original coating production line of furniture enterprises, so that the cost is huge, the pressure of the production and operation environment of domestic furniture enterprises is high, and the transformation with high cost cannot be borne in a short period.
Some practitioners of furniture reflect concerns about the cost of the technical transformation, and put many people hesitant to take the first step of "oil to water". On the one hand, the unit price of the water-based paint is higher than that of the oil-based paint, so that the production cost is increased; on the other hand, the lack of reference of authoritative industry data, the cost of equipment replacement, technical adjustment and manpower training also hinders the practice of 'changing oil and changing water' of some small enterprises. In recent years, the water-based paint in China has been developed greatly, the use ratio of the water-based paint is gradually improved, in the face of strict environmental protection requirements, the country strengthens the control of solvent-based furniture paint, provides developed fertile soil for the water-based furniture paint, can further improve the performance of the water-based paint in the future, and especially is a novel high-performance environment-friendly paint
Coatings using water as a solvent or as a dispersion medium can be referred to as water-based coatings, which are classified into two main categories according to the category of binders in the coatings: natural water-based paints of natural substances or minerals (such as potassium silicate) and petrochemical water-based paints of synthetic resins (such as acrylic resins). The water paint is a paint which takes water as a diluent and does not contain an organic solvent, does not contain benzene, toluene, xylene, formaldehyde and free TDI toxic heavy metals, is nontoxic, has no pungent smell, is harmless to a human body, does not pollute the environment, is full of paint films, is glittering and translucent, has good flexibility, and has the characteristics of water resistance, wear resistance, aging resistance, yellowing resistance, quick drying, convenient use and the like.
With the continuous development of times, various performances of the water-based paint are continuously perfected to meet the use requirements in different application scenes, and the water-based paint such as the water-based polyester paint is provided, but the water-based polyester paint disclosed at present has the defects of non-chemical resistance, poor flexibility of unsaturated polyester paint, easy brittle fracture under stress, poor flexibility, poor adhesive force and the like, so that the practical application of the water-based polyester paint in certain specific fields is limited, and therefore, the water-based polyester coiled aluminum paint and the preparation method thereof are provided.
Disclosure of Invention
The invention provides the following technical scheme: the water-based polyester coiled aluminum coating comprises the following raw materials in parts by weight; 20-30 parts of water-based polyester, 2-5 parts of high methylated amino resin, 5-15 parts of deionized water, 1-3 parts of pH regulator, 2-5 parts of epoxy phosphate, 10-20 parts of film forming assistant, 0.3-0.5 part of wetting agent, 0.2-0.5 part of defoaming agent, 0.3-0.5 part of flatting agent, 0.5-1 part of dispersing agent, 0.5-1 part of scratch-resistant assistant, 2-5 parts of polytetrafluoroethylene wax slurry, 2-5 parts of matting powder and 0.1-0.5 part of acid catalyst.
The preparation method of the water-based polyester coating comprises the following steps;
s1, weighing 20-30 parts of water-based polyester, 2-5 parts of high methylated amino resin, 5-15 parts of deionized water, 1-3 parts of pH regulator, 2-5 parts of epoxy phosphate, 10-20 parts of film forming additive, 0.3-0.5 part of wetting agent, 0.2-0.5 part of defoaming agent, 0.3-0.5 part of flatting agent, 0.5-1 part of dispersing agent, 2-5 parts of anti-scratch additive, 2-5 parts of polytetrafluoroethylene wax slurry, 2-5 parts of matting powder and 0.1-0.5 part of acid catalyst for later use;
s2: adding water-based polyester into a cleaned mixing kettle, adding a film-forming assistant, starting a stirrer, slowly stirring at a low speed of not more than 30/min, and uniformly dispersing. Obtaining the filling material;
s3, adding the wetting agent, the dispersing agent and the defoaming agent into the S2 in sequence, stirring for 5min respectively, and fully mixing.
S4: putting titanium dioxide, matting powder, polytetrafluoroethylene wax and water into an S2 mixer for full mixing, and performing ultrasonic dispersion for 30-60min after mixing to obtain pigment; it is noted that too much water is not stirred for a long time.
S5: then regulating the pH value to 7-9 by using a pH regulator. Then sequentially adding the high methylated amino resin, the scratch-resistant auxiliary agent, the flatting agent, the film forming auxiliary agent and the acid catalyst, stirring for 5-0min respectively, and fully stirring and mixing; obtaining the water-based polyester coating.
The preparation method of the water-based polyester coil aluminum coating is characterized in that the ultrasonic power in the step S4 is 150-350W, the mixing and stirring speed in the steps S1, S2, S4, S5 and S6 is 1300-1500r/min, and the mixing time is 5-10min respectively.
Compared with the prior art, the invention provides the water-based polyester coil aluminum coating and the preparation method thereof, and the water-based polyester coil aluminum coating has the following beneficial effects:
according to the invention, the waterborne ester coating is prepared by mixing the raw materials such as the waterborne polyester resin and the high methylated amino resin, so that the characteristics of the waterborne polyester coating, such as flexibility, impact resistance and adhesive force, are ensured.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The first embodiment; s1, 25.4 parts of water-based polyester, 3.4 parts of high methyl etherified amino resin, 20.65 parts of deionized water, 1.5 parts of pH regulator, 3 parts of epoxy phosphate, 10 parts of film forming assistant, 0.4 part of wetting agent, 0.25 part of defoaming agent, 0.4 part of flatting agent, 0.85 part of dispersing agent, 0.65 part of scratch-resistant assistant, 3.4 parts of polytetrafluoroethylene wax, 1.7 parts of matting powder and 0.25 part of acid catalyst;
s2: adding water-based polyester into a cleaned mixing kettle, adding a film-forming assistant, starting a stirrer, slowly stirring at a low speed of not more than 30/min, and uniformly dispersing. Obtaining the filling material;
s3, adding the wetting agent, the dispersing agent and the defoaming agent into the S2 in sequence, stirring for 5min respectively, and fully mixing.
S4: putting titanium dioxide, matting powder, polytetrafluoroethylene wax and water into an S2 mixer for full mixing, and performing ultrasonic dispersion for 30-60min after mixing to obtain pigment; the water is not stirred for a long time when the dosage of the water is too much and too little.
S5: then regulating the pH value to 7-9 by using a pH regulator. Then sequentially adding the high methyl-etherified amino resin, the scratch-resistant assistant, the flatting agent, the film-forming assistant and the acid catalyst, stirring for 5-0min respectively, and fully stirring and mixing; obtaining the water-based polyester coating.
Example two;
s1: weighing 20.4 parts of water-based polyester, 2.9 parts of high methylated amino resin, 16.65 parts of deionized water, 1 part of pH regulator, 2.5 parts of epoxy phosphate, 8.5 parts of film-forming assistant, 0.35 part of wetting agent, 0.20 part of defoaming agent, 0.32 part of flatting agent, 0.65 part of dispersing agent, 0.5 part of scratch-resistant assistant, 2.8 parts of polytetrafluoroethylene wax, 1.4 parts of matting powder and 0.2 part of acid catalyst for later use;
s2: adding water-based polyester into a clean mixing kettle, adding a film-forming assistant, starting a stirrer, slowly stirring at a low speed of not more than 30/min, and uniformly dispersing. Obtaining the filling material;
s3, adding the wetting agent, the dispersing agent and the defoaming agent into the S2 in sequence, stirring for 5min respectively, and fully mixing.
S4: putting titanium dioxide, matting powder, polytetrafluoroethylene wax and water into an S2 mixer for full mixing, and performing ultrasonic dispersion for 30-60min after mixing to obtain pigment; the water is not stirred for a long time when the dosage of the water is too much and too little.
S5: then regulating the pH value to 7-9 by using a pH regulator. Then sequentially adding the high methylated amino resin, the scratch-resistant auxiliary agent, the flatting agent, the film forming auxiliary agent and the acid catalyst, stirring for 5-0min respectively, and fully stirring and mixing; obtaining the water-based polyester coating.
Example three;
s1: weighing 30.4 parts of water-based polyester, 4 parts of high methylated amino resin, 24.65 parts of deionized water, 1.8 parts of pH regulator, 3.6 parts of epoxy phosphate, 12 parts of film-forming assistant, 0.48 part of wetting agent, 0.3 part of defoaming agent, 0.48 part of flatting agent, 1 part of dispersant, 0.76 part of scratch-resistant assistant, 4 parts of polytetrafluoroethylene wax, 2 parts of matting powder and 0.3 part of acid catalyst for later use;
s2: adding water-based polyester into a cleaned mixing kettle, adding a film-forming assistant, starting a stirrer, slowly stirring at a low speed of not more than 30/min, and uniformly dispersing. Obtaining the filling material;
s3, adding the wetting agent, the dispersing agent and the defoaming agent into the S2 in sequence, stirring for 5min respectively, and fully mixing.
S4: putting titanium dioxide, matting powder, polytetrafluoroethylene wax and water into an S2 mixer for full mixing, and performing ultrasonic dispersion for 30-60min after mixing to obtain pigment; the water is not stirred for a long time when the dosage of the water is too much and too little.
S5: then regulating the pH value to 7-9 by using a pH regulator. Then sequentially adding the high methylated amino resin, the scratch-resistant auxiliary agent, the flatting agent, the film forming auxiliary agent and the acid catalyst, stirring for 5-0min respectively, and fully stirring and mixing; obtaining the water-based polyester coating.
Comparative example one;
s1: weighing 25.4 parts of water-based polyester, 3.4 parts of high methylated amino resin, 20.65 parts of deionized water, 1.5 parts of pH regulator, 3 parts of epoxy phosphate, 10 parts of film-forming assistant, 0.4 part of wetting agent, 0.25 part of defoaming agent, 0.4 part of flatting agent, 0.85 part of dispersing agent, 1.7 parts of matting powder and 0.25 part of acid catalyst for later use;
s2: adding water-based polyester into a cleaned mixing kettle, adding a film-forming assistant, starting a stirrer, slowly stirring at a low speed of not more than 30/min, and uniformly dispersing. Obtaining the filling material;
s3, adding the wetting agent, the dispersing agent and the defoaming agent into the S2 in sequence, stirring for 5min respectively, and fully mixing.
S4: putting titanium dioxide, matting powder, polytetrafluoroethylene wax and water into an S2 mixer for full mixing, and performing ultrasonic dispersion for 30-60min after mixing to obtain pigment; the water is not stirred for a long time when the dosage of the water is too much and too little.
S5: then regulating the pH value to 7-9 by using a pH regulator. Then sequentially adding the high methylated amino resin, the scratch-resistant auxiliary agent, the flatting agent, the film forming auxiliary agent and the acid catalyst, stirring for 5-0min respectively, and fully stirring and mixing; obtaining the water-based polyester coating.
Comparative example No. two
S1: weighing 25.4 parts of water-based polyester, 3.4 parts of high methylated amino resin, 20.65 parts of deionized water, 1.5 parts of pH regulator, 10 parts of film-forming assistant, 0.4 part of wetting agent, 0.25 part of defoamer, 0.4 part of flatting agent, 0.85 part of dispersant, 0.65 part of scratch-resistant assistant, 3.4 parts of polytetrafluoroethylene wax, 1.7 parts of matting powder and 0.25 part of acid catalyst for later use;
s2: adding water-based polyester into a cleaned mixing kettle, adding a film-forming assistant, starting a stirrer, slowly stirring at a low speed of not more than 30/min, and uniformly dispersing. Obtaining the filling material;
s3, adding the wetting agent, the dispersing agent and the defoaming agent into the S2 in sequence, stirring for 5min respectively, and fully mixing.
S4: putting titanium dioxide, matting powder, polytetrafluoroethylene wax and water into an S2 mixer for full mixing, and performing ultrasonic dispersion for 30-60min after mixing to obtain a pigment; it is noted that too much water is not stirred for a long time.
S5: then regulating the pH value to 7-9 by using a pH regulator. Then sequentially adding the high methylated amino resin, the scratch-resistant auxiliary agent, the flatting agent, the film forming auxiliary agent and the acid catalyst, stirring for 5-0min respectively, and fully stirring and mixing; obtaining the water-based polyester coating.
Respectively detecting the performances of the waterborne silicon modified polyester coatings prepared by the first to third embodiments and the first to second embodiments of the invention to obtain the following parameters;
in summary, the research parameters of the first to third examples and the first to second comparative examples show that the data parameters of the first example are better, the experimental data parameters of the second example and the third example are general, the poor MEK resistance of the experimental parameters of the second comparative example can indicate that the epoxy phosphate has an influence on MEK and hardness, and the poor scratch resistance of the experimental parameters of the first comparative example can indicate that the scratch resistance assistant and the polytetrafluoroethylene wax improve the scratch resistance of the coating.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. The water-based polyester coiled aluminum coating is characterized by comprising the following raw materials in parts by weight; 20-30 parts of water-based polyester, 2-5 parts of high methylated amino resin, 5-15 parts of deionized water, 1-3 parts of pH regulator, 2-5 parts of epoxy phosphate, 10-20 parts of film-forming assistant, 0.3-0.5 part of wetting agent, 0.2-0.5 part of defoaming agent, 0.3-0.5 part of flatting agent, 0.5-1 part of dispersing agent, 0.5-1 part of scratch-resistant assistant, 2-5 parts of polytetrafluoroethylene wax slurry, 2-5 parts of matting powder and 0.1-0.5 part of acid catalyst.
2. The waterborne polyester aluminum coil coating of claim 1, wherein the substrate is an aluminum plate.
3. The water-based polyester coiled aluminum coating as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight; 25.4 parts of water-based polyester, 3.4 parts of high-methyl-etherified amino resin, 20.65 parts of deionized water, 1.5 parts of pH regulator, 3 parts of epoxy phosphate, 10 parts of film-forming assistant, 0.4 part of wetting agent, 0.25 part of defoaming agent, 0.4 part of flatting agent, 0.85 part of dispersing agent, 0.65 part of scratch-resistant assistant, 3.4 parts of polytetrafluoroethylene wax, 1.7 parts of matting powder and 0.25 part of acid catalyst.
4. The water-based polyester coiled aluminum paint as claimed in claim 1, wherein the leveling agent is BYK-381 leveling agent, the defoamer is BYK-024 defoamer, the dispersant is TEGO760W dispersant, the wetting agent is TEGO Wet 270 wetting agent, the film-forming assistant is ethylene glycol butyl ether and ethanol, the epoxy phosphate ester is E44-epoxy resin, the high methyl etherified amino resin is CYMEL 303LF high methyl etherified amino resin, the pH regulator is ammonia, the acidic catalyst is CYCAT 4040 acid catalyst, the titanium dioxide is R-902+ titanium dioxide, and the scratch-resistant assistant is DC51.
5. The water-based polyester coiled aluminum coating material as claimed in claim 1, wherein the preparation method of the water-based polyester coiled aluminum coating material comprises the following steps;
s1: weighing 25.4 parts of water-based polyester, 3.4 parts of high methylated amino resin, 20.65 parts of deionized water, 1.5 parts of pH regulator, 3 parts of epoxy phosphate, 10 parts of film-forming assistant, 0.4 part of wetting agent, 0.25 part of defoamer, 0.4 part of flatting agent, 0.85 part of dispersant, 0.65 part of scratch-resistant assistant, 3.4 parts of polytetrafluoroethylene wax, 1.7 parts of matting powder and 0.25 part of acid catalyst for later use;
s2: adding water-based polyester into a cleaned mixing kettle, adding a film-forming assistant, starting a stirrer, slowly stirring at a low speed of not more than 30/min, and uniformly dispersing. Obtaining the filling material;
s3, adding the wetting agent, the dispersing agent and the defoaming agent into the S2 in sequence, stirring for 5min respectively, and fully mixing;
s4: putting titanium dioxide, matting powder, polytetrafluoroethylene wax and water into an S2 mixer for full mixing, and performing ultrasonic dispersion for 30-60min after mixing to obtain a pigment; the water is not stirred for a long time when the consumption of the water is too much and too little;
s5: then regulating the pH value to 7-9 by using a pH regulator. Then sequentially adding the high methylated amino resin, the scratch-resistant auxiliary agent, the flatting agent, the film forming auxiliary agent and the acid catalyst, stirring for 5-0min respectively, and fully stirring and mixing; obtaining the water-based polyester coating.
6. The method for preparing the water-based polyester coil aluminum coating according to claim 1, wherein the ultrasonic power in the step S4 is 150-350W, the mixing and stirring speed in the steps S1, S2, S4, S5 and S6 is 1300-1500r/min, and the mixing time is 5-10min respectively.
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