CN113698830A - Coating composition and application thereof - Google Patents
Coating composition and application thereof Download PDFInfo
- Publication number
- CN113698830A CN113698830A CN202110962749.4A CN202110962749A CN113698830A CN 113698830 A CN113698830 A CN 113698830A CN 202110962749 A CN202110962749 A CN 202110962749A CN 113698830 A CN113698830 A CN 113698830A
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- primer
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- functionality
- water
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- 239000008199 coating composition Substances 0.000 title claims abstract description 37
- 239000002987 primer (paints) Substances 0.000 claims abstract description 84
- 239000000839 emulsion Substances 0.000 claims abstract description 79
- 239000003973 paint Substances 0.000 claims abstract description 70
- 239000002994 raw material Substances 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000000576 coating method Methods 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 32
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 28
- 239000000178 monomer 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 18
- 229920002635 polyurethane Polymers 0.000 claims abstract description 16
- 239000004814 polyurethane Substances 0.000 claims abstract description 16
- 239000004593 Epoxy Substances 0.000 claims abstract description 13
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 12
- -1 anionic carboxylic acid modified acrylate Chemical class 0.000 claims abstract description 12
- 238000001771 vacuum deposition Methods 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000006184 cosolvent Substances 0.000 claims description 13
- 239000013008 thixotropic agent Substances 0.000 claims description 13
- 239000000080 wetting agent Substances 0.000 claims description 13
- 239000012948 isocyanate Substances 0.000 claims description 10
- 150000002513 isocyanates Chemical class 0.000 claims description 10
- 239000011247 coating layer Substances 0.000 claims description 9
- 239000013530 defoamer Substances 0.000 claims description 7
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000007747 plating Methods 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 238000009472 formulation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003002 pH adjusting agent Substances 0.000 description 3
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 description 2
- JMWGZSWSTCGVLX-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;2-methylprop-2-enoic acid Chemical class CC(=C)C(O)=O.CC(=C)C(O)=O.CC(=C)C(O)=O.CCC(CO)(CO)CO JMWGZSWSTCGVLX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 239000012972 dimethylethanolamine Substances 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- FTALTLPZDVFJSS-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl prop-2-enoate Chemical compound CCOCCOCCOC(=O)C=C FTALTLPZDVFJSS-UHFFFAOYSA-N 0.000 description 1
- 241000406799 Deto Species 0.000 description 1
- 241001553290 Euphorbia antisyphilitica Species 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 241000544076 Whipplea modesta Species 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004178 amaranth Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000004386 diacrylate group Chemical group 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000002087 whitening effect Effects 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
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- 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
- C09D7/63—Additives non-macromolecular organic
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 coating composition and application thereof. A coating composition comprising: primer and finish; the preparation raw materials of the primer comprise: 6-8 functionality acrylate emulsion, 2-4 functionality acrylate emulsion and water-based alkoxylated UV monomer; the preparation raw materials of the finish paint comprise: the adhesive comprises 8-12 functionality aliphatic acrylic emulsion, 2-4 functionality epoxy modified polyurethane acrylic emulsion, anionic carboxylic acid modified acrylate emulsion and an adhesion promoter. The coating combination provided by the invention can meet the requirements of vacuum coating by adjusting the composition of the primer and the finish in the coating combination.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a coating composition and application thereof.
Background
In order to make the plastic surface have metallic luster and brightness, a vacuum coating process is generally adopted. At present, vacuum coating ultraviolet curing paint is generally realized by adopting a process of oily primer → coating → coloring medium paint → oily finish paint, but the oily paint has the defects of overproof VOC, no environmental protection, large skin irritation and the like, and can not meet the requirements of related laws; the existing water-based paint is difficult to meet the performance requirements of vacuum coating such as glossiness and the like.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art described above. Therefore, the invention provides a coating combination, and the water-based coating can meet the requirements of vacuum coating by adjusting the composition of the primer and the finish in the coating combination.
The invention also provides a coating comprising the paint combination to form a combined paint film.
The invention also provides an electronic product comprising the coating.
According to one aspect of the present invention, there is provided a coating composition comprising: primer and finish;
the preparation raw materials of the primer comprise: 6-8 functionality acrylate emulsion, 2-4 functionality acrylate emulsion and water-based alkoxylated UV monomer;
the preparation raw materials of the finish paint comprise: the adhesive comprises 8-12 functionality aliphatic acrylic emulsion, 2-4 functionality epoxy modified polyurethane acrylic emulsion, anionic carboxylic acid modified acrylate emulsion and an adhesion promoter.
According to a preferred embodiment of the present invention, at least the following advantages are provided:
(1) in the coating composition provided by the invention, the primer comprises film forming substances consisting of 6-8 functionality acrylate emulsion, 2-4 functionality acrylate emulsion and water-based alkoxylated UV monomer, the film forming substances are matched with each other, the advantages of good leveling property, good fullness and good construction property are achieved, and the obtained primer film can be ensured to have better curing effect and flexibility, so that the phenomena of whitening, coloring and no metal feeling caused by incomplete curing of the surface of the primer film are avoided, and the phenomenon that a coating layer cannot be attached due to overhigh hardness of the primer film is avoided.
(2) In the coating composition provided by the invention, the water-based alkoxylated UV monomer in the primer overcomes the defect that the common UV monomer is not dissolved in the water-based emulsion, and can better keep a homogeneous state with the water-based emulsion; meanwhile, more oxygen atoms in the alkane oxidation monomer can form hydrogen bonds with the metal coating and the finish paint film, so that the binding force of the metal coating, the finish paint film and the metal coating is improved; the water-based alkoxylated UV monomer can also adjust the hardness of a paint film, and more mainly can improve the leveling effect of a primer paint film and improve the fullness of the primer paint film, so that the metal texture of the metal coating is stronger and the fullness is better.
(3) In the coating combination provided by the invention, film-forming substances of the finish paint are 8-12 functionality aliphatic acrylic emulsion, 2-4 functionality epoxy modified polyurethane acrylic emulsion and anionic carboxylic acid modified acrylate emulsion, and the combination can ensure that a finish paint film has good adhesive force and excellent appearance metal effect on a metal coating, and simultaneously the obtained finish paint film has certain hardness and cannot collapse due to overhigh hardness; specifically, the method comprises the following steps: the aliphatic acrylic emulsion with the functionality of 8-12 can improve the leveling property of a paint film, and improve the performances of hardness, wear resistance, chemical resistance and the like of the paint film; the 2-4 functionality epoxy modified polyurethane acrylic emulsion is matched with the anionic carboxylic acid modified acrylate emulsion, and due to the fact that epoxy groups and hydroxyl groups in the acrylic emulsion have high polarity, the acrylic emulsion is easy to combine with metal atoms such as indium/tin/aluminum in a metal coating, besides Van der Waals force, a chelate can be formed with the metal atoms, and adhesion of a finish paint film on the metal coating is facilitated; in addition, the adhesion promoter can also improve the adhesion between a finish paint film and a plating layer.
(4) The finish paint provided by the invention also has excellent weather resistance, is very weak in corrosion to a plating layer, and cannot influence the metal feeling of the plating layer; after the primer and the finish paint are matched, the metal texture of the surface of the primer and the finish paint is not obviously different from that of metal, the metal appearance effect can be completely the same as that of metal, the wear resistance, scratch resistance, hand feeling and the like of the primer and the finish paint are all superior to those of metal, but the cost of the primer and the finish paint is far lower than that of metal, and the total weight of the primer and the finish paint is also far lower than that of metal.
(5) In the coating combination provided by the invention, both the primer and the finish are water-based coatings, so that the material is extremely low in corrosivity and cannot be bitten, the material shielding performance of the coating is improved, and the production yield is ensured.
In some embodiments of the invention, the 6-8 functionality acrylate emulsion in the primer is an anionic waterborne aliphatic polyurethane acrylic emulsion.
In some embodiments of the invention, the 6-8 functionality acrylate emulsion in the primer is selected from at least one of Happy DR-W486 and Bayer 2720.
In some embodiments of the invention, the 6-8 functionality acrylate emulsion in the primer has an average molecular weight of 30000-50000.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 10-18 parts of 6-8 functionality acrylate emulsion.
In some preferred embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 15 parts of 6-8 functionality acrylate emulsion.
The 6-8 functionality acrylic ester emulsion has the advantages of good wettability to materials, good leveling property, good fullness, high gloss, high curing speed, excellent weather resistance and the like.
In some embodiments of the invention, the 2-4 functional acrylate emulsion is a hydroxyl-containing water-based aromatic polyurethane acrylic emulsion, and has the advantages of good material wettability, good leveling property, high gloss, good fullness, excellent water resistance, good platability on a plating layer and the like.
In some embodiments of the invention, the 2-4 functionality acrylate emulsion in the primer is selected from the group consisting of ALBERDINGK BOLEY LUX560,
UV XP 2690 and BayhAt least one of the ydrol UV XP 2689.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 40-60 parts of 2-4 functionality acrylate emulsion.
In some preferred embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 55 parts of 2-3 functional acrylate emulsion.
In some embodiments of the present invention, the 6-8 functionality acrylate emulsion and the 2-4 functionality acrylate emulsion are present in a mass ratio of 1.7-4.5: 10.
In some embodiments of the present invention, the 6-8 functionality acrylate emulsion and the 2-4 functionality acrylate emulsion are in a mass ratio of one of 2:10, 3:10, and 4: 10.
In some embodiments of the invention, the aqueous alkoxylated UV monomer is selected from at least one of ethoxylated trimethylolpropane trimethacrylate, polyethylene glycol diacrylate and ethoxyethoxyethyl acrylate.
In some embodiments of the invention, the aqueous alkoxylated UV monomer is selected from at least one of the johns EM2411, EM265, EM2386, EM211 and sartomer SR 344.
The water-based alkoxylated UV monomer contains both alkoxy and hydroxyl, so that the water-based emulsion has the advantages of good miscibility, capability of effectively improving the leveling property and the plating property of the coating, and the like.
In some embodiments of the present invention, the aqueous alkoxylated UV monomer is a 1-3 functional aqueous alkoxylated UV monomer.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 10-20 parts of water-based alkoxylated UV monomer.
In some embodiments of the invention, the amount of the aqueous alkoxylated UV monomer added in the primer is independently selected from one of 10 parts, 12 parts, 14 parts, 15 parts, 16 parts, 18 parts and 20 parts by weight.
In some embodiments of the present invention, the raw materials for preparing the primer further include: at least one of a photoinitiator, a pH regulator, a cosolvent, an aqueous wetting agent, an aqueous leveling agent, an aqueous defoamer and an aqueous thixotropic agent.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 2-6 parts of a photoinitiator.
In some embodiments of the present invention, the photoinitiator is added in an amount of about 4 parts by weight in the primer.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 0.05-0.2 part of pH regulator.
In some embodiments of the present invention, the pH adjusting agent is added in an amount of about 0.1 parts by weight in the primer.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: and 1-3 parts of a cosolvent.
In some embodiments of the present invention, the co-solvent is added to the primer in an amount of about 2 parts by weight.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 0.5-2 parts of a water-based wetting agent.
In some embodiments of the present invention, the aqueous wetting agent is added to the primer in an amount of about 1 part by weight.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 0.5-2 parts of a water-based leveling agent.
In some embodiments of the present invention, the aqueous leveling agent is added in an amount of about 1 part by weight in the primer.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 0.1-0.4 part of water-based defoaming agent.
In some embodiments of the present invention, the water-based defoamer is added to the primer in an amount of about 2 parts by weight.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 0.5-2 parts of water-based thixotropic agent.
In some embodiments of the present invention, the aqueous thixotropic agent is added to the primer in an amount of about 1 part by weight.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: 4-10 parts of deionized water.
In some embodiments of the present invention, the primer is prepared from the following raw materials in parts by weight: about 5.7 parts deionized water.
In some embodiments of the invention, the 8-12 functionality aliphatic acrylic emulsion is an anionic aqueous aliphatic polyurethane acrylic emulsion.
In some embodiments of the invention, the 8-12 functionality aliphatic acrylic emulsion in the topcoat is selected from at least one of the group consisting of Happy DR-W470 and Zhanxin 7200.
In some embodiments of the invention, the 8-12 functionality aliphatic acrylic emulsion has an average molecular weight of 40000-80000.
The 8-12 functionality aliphatic acrylic emulsion has the advantages of good fullness, high curing speed, good wear resistance, excellent weather resistance and the like.
In some embodiments of the present invention, the finishing paint is prepared from the following raw materials in parts by weight: 20-60 parts of 8-12 functionality aliphatic acrylic emulsion.
In some embodiments of the present invention, the 8-12 functionality aliphatic acrylic emulsion is added to the topcoat in an amount independently selected from one of 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, and 60 parts by weight.
In some embodiments of the invention, the 2-4 functionality epoxy modified polyurethane acrylic emulsion in the topcoat is selected from at least one of ALBERDINGK BOLEY LUX484 and candelilla 7210.
In some embodiments of the present invention, the finishing paint is prepared from the following raw materials in parts by weight: 20-40 parts of 2-4 functionality epoxy modified polyurethane acrylic emulsion.
In the finish paint, the 2-4 functionality epoxy modified polyurethane acrylic emulsion has the advantages of good adhesion to metal, high curing speed, high hardness, good wear resistance and the like, and can improve the adhesion between a metal coating and a finish paint film and improve the wear resistance.
In some embodiments of the invention, the addition amount of the 2-4 functional epoxy modified polyurethane acrylic emulsion in the finishing paint is independently selected from one of 20 parts, 25 parts, 30 parts, 35 parts and 40 parts by weight.
In some embodiments of the invention, the anionic carboxylic acid modified acrylate emulsion in the topcoat is selected from at least one of Imperial E-123, Opabdy SC48, and Opabdy AC 2403.
In some embodiments of the invention, in the finish paint, the anionic carboxylic acid modified acrylate emulsion contains hydroxyl, and the emulsion has high film-forming temperature, very good adhesion to a metal coating layer and certain water resistance and weather resistance.
In some embodiments of the present invention, the finishing paint is prepared from the following raw materials in parts by weight: 2-6 parts of anionic carboxylic acid modified acrylate emulsion.
In some embodiments of the present invention, the anionic carboxylic acid-modified acrylate emulsion is added to the topcoat in an amount independently selected from one of 2 parts, 4 parts, and 6 parts by weight.
In some embodiments of the invention, the adhesion promoter in the topcoat is an alkyd adhesion promoter.
In some embodiments of the invention, the adhesion promoter in the topcoat is selected from at least one of DEGO DS50, BYK4510, anatase RS8101, and DEGO DS 1300.
The alkyd adhesion promoter has good carboxyl penetrability and large polarity, and can form hydrogen bonds with nitrogen and oxygen atoms in the primer through the metal coating; thereby improving the adhesive force among the primer paint film, the plating layer and the finish paint film.
In some embodiments of the present invention, the finishing paint is prepared from the following raw materials in parts by weight: 2-8 parts of an adhesion promoter.
In some embodiments of the present invention, the adhesion promoter is added in the topcoat in an amount independently selected from one of 2 parts, 4 parts, 5 parts, 6 parts, and 8 parts by weight.
In some embodiments of the present invention, the raw materials for preparing the topcoat further comprise an isocyanate.
In some embodiments of the present invention, the isocyanate is added in the topcoat in an amount of 4 to 8 parts by weight.
In some embodiments of the present invention, the isocyanate is added in the topcoat in an amount of about 6 parts by weight.
The isocyanate is used as a curing agent and has the advantages of small shrinkage, good yellowing resistance, good adhesion to metal and the like.
The isocyanate can react with hydroxyl and carboxyl in the primer and the finish paint, so that the binding force between the primer and the finish paint is increased; the epoxy group, the carboxyl group, the hydroxyl group and the isocyanate in the emulsion are mutually cooperated and act together, so that the binding force among the primer, the coating and the finish paint is greatly improved, and the integral adhesive force, high temperature and high humidity and other performances of the paint film are ensured.
In some embodiments of the present invention, the raw materials for preparing the top-coat further comprise: at least one of a photoinitiator, a pH regulator, a cosolvent, an aqueous wetting agent, an aqueous leveling agent, an aqueous defoamer and an aqueous thixotropic agent.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: 2-8 parts of a photoinitiator.
In some embodiments of the present invention, the photoinitiator is added to the topcoat in an amount of about 5 parts by weight.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: 0.05-0.2 part of pH regulator.
In some embodiments of the present invention, the pH adjusting agent is added to the topcoat in an amount of about 0.1 parts by weight.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: and 1-5 parts of a cosolvent.
In some embodiments of the present invention, the co-solvent is added to the topcoat in an amount of about 3 parts by weight.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: 0.5-2 parts of a water-based wetting agent.
In some embodiments of the present invention, the aqueous wetting agent is added to the topcoat in an amount of about 1 part by weight.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: 0.5-2 parts of a water-based leveling agent.
In some embodiments of the present invention, the aqueous leveling agent is added in an amount of about 1 part by weight in the topcoat.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: 0.1-0.4 part of water-based defoaming agent.
In some embodiments of the present invention, the aqueous defoamer is added to the topcoat in an amount of about 0.2 parts by weight.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: 0.5-2 parts of water-based thixotropic agent.
In some embodiments of the present invention, the aqueous thixotropic agent is added to the topcoat in an amount of about 1 part by weight.
In some embodiments of the present invention, the raw materials for preparing the finish paint further comprise, by weight: 1-5 parts of deionized water.
In some embodiments of the present invention, the deionized water is added to the topcoat in an amount of about 3.7 parts by weight.
In some embodiments of the present invention, the topcoat is a two-component topcoat, wherein the component B is isocyanate and all other components are mixed and reacted to obtain the component a.
The isocyanate in the component B can continuously generate slow crosslinking reaction in the finish paint film in the baking stage, the ultraviolet curing stage and the subsequent placing process of the finish paint film, so that the defects of extremely high single ultraviolet curing reaction speed, large paint film shrinkage and the like are overcome, the stress release of the finish paint film is relieved, and the adhesive force of the finish paint to a metal coating is improved.
In some embodiments of the invention, the aqueous wetting agent in the coating composition is selected from at least one of BYK346 and DEGO chemical deto WET 280.
In some embodiments of the invention, the photoinitiator in the coating composition is selected from at least one of IRGACURE 500 from BASF, BASF TPO-L, and IRGACURE 1173.
In some embodiments of the invention, the co-solvent in the coating composition is dipropylene glycol butyl ether.
In some embodiments of the invention, the pH adjusting agent in the coating composition is DMEA of mitsubishi.
In some embodiments of the invention, the aqueous defoamer in the coating composition is selected from at least one of BYK019 and dikao chemical DEGO 810.
In some embodiments of the invention, the aqueous leveling agent in the coating composition is selected from at least one of BYK333, BYK381, and modesty 457
In some embodiments of the invention, the aqueous thixotropic agent in the coating composition is selected from at least one of Luborun SOLTHIX A-200 and Haimax FX 1010.
In some embodiments of the invention, the deionized water is self-made in the coating composition.
According to another aspect of the invention, an electronic product is provided, the surface of which is provided with a vacuum coating layer, and the preparation raw materials of the vacuum coating layer comprise the coating composition.
According to the electronic product of a preferred embodiment of the invention, at least the following beneficial effects are achieved:
due to the matching of the components in the coating composition, the obtained coating has metal texture and lower price, and the experience of consumers is improved.
In some embodiments of the present invention, the vacuum coating layer comprises:
the primer film is prepared from the primer as a raw material and is attached to the surface of the electronic product;
the metal coating is arranged on the surface of the primer paint film;
the finishing paint film is prepared from the finishing paint which is arranged on the surface of the metal coating.
In some embodiments of the invention, the electronic product includes a mobile phone, a camera, a notebook computer, a desktop computer, and a tablet computer.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Unless otherwise specified, the description of the embodiments section,
primer coating:
the acrylate emulsion with the functionality of 6-8 is Changxing DR-W486;
the 2-4 functionality acrylate emulsion is Eupatori LUX 560;
the waterborne alkoxylated UV monomer is ethoxylated trimethylolpropane trimethacrylate;
finishing paint:
the aliphatic acrylic emulsion with the functionality of 8-12 is Happy DR-W470;
the epoxy modified polyurethane acrylic emulsion with the functionality of 2-4 is Zhanxin 7210;
the anionic carboxylic acid modified acrylate emulsion is European Teddy SC 48;
the adhesion promoter is DEGO DS 50;
together:
the photoinitiator is IRGACURE 500 of BASF;
the pH regulator is DMEA of Mitsubishi;
the cosolvent is dipropylene glycol butyl ether;
the water-based wetting agent is DEGO WET 280;
the aqueous flatting agent is BYK 333;
the aqueous antifoaming agent is digao chemical DEGO 810;
the deionized water is self-made;
the aqueous thixotropic agent is Haimax FX 1010.
Example 1
The embodiment provides a coating combination, which comprises a primer 1 and a finish coat 1, wherein the specific formulation is shown in tables 1-2.
TABLE 1 primer ratio
| Primer 1 | Primer 2 | Primer 3 | Primer 4 | |
| Parts by mass | Parts by mass | Parts by mass | Parts by mass | |
| 6-8 functionality acrylic ester emulsion | 15 | 5 | 10 | 20 |
| 2-4 functionality acrylate emulsion | 55 | 75 | 65 | 45 |
| Aqueous alkoxylated UV monomer | 15 | 5 | 10 | 20 |
| Photoinitiator | 4 | 4 | 4 | 4 |
| pH regulator | 0.1 | 0.1 | 0.1 | 0.1 |
| Cosolvent | 2 | 2 | 2 | 2 |
| Aqueous wetting agent | 1 | 1 | 1 | 1 |
| Aqueous leveling agent | 1 | 1 | 1 | 1 |
| Aqueous defoaming agent | 0.2 | 0.2 | 0.2 | 0.2 |
| Deionized water | 5.7 | 5.7 | 5.7 | 5.7 |
| Aqueous thixotropic agent | 1 | 1 | 1 | 1 |
TABLE 2 proportion of top coat
Example 2
This example produces a coating composition comprising primer 1 and topcoat 2, wherein the formulation of primer 1 is shown in table 1 and the formulation of topcoat 2 is shown in table 2.
Example 3
This example produces a coating composition comprising primer 1 and topcoat 3, wherein the formulation of primer 1 is shown in table 1 and the formulation of topcoat 3 is shown in table 2.
Comparative example 1
The comparative example prepares a coating composition, and is different from the example 1 in that the finishing coat adopts a finishing coat 4, the composition of the finishing coat is shown in the table 2, and the dosage of the 2-4 functionality epoxy modified polyurethane acrylic emulsion is out of the range.
Comparative example 2
The comparative example prepares a coating composition, and is different from the example 1 in that the finishing coat adopts a finishing coat 5, the composition of the finishing coat is shown in the table 2, and the dosage of the 2-4 functionality epoxy modified polyurethane acrylic emulsion is out of the range.
Comparative example 3
This comparative example prepared a coating composition which differed from example 1 in that the topcoat used was topcoat 6, the composition of which is shown in table 2.
Comparative example 4
This comparative example prepared a coating composition which differed from example 1 in that the topcoat used was topcoat 7, the composition of which is shown in table 2.
Test examples
In the first aspect of the test example, the performance of the primer was tested by the following specific method:
firstly, the primers 1-4 in Table 1 are respectively sprayed on the surface of a substrate and cured, and the thickness of the sprayed film is 14 +/-2 μm (in the process of coating, the thickness of different positions may be tinyDeviation, no influence on test), the curing mode is 60 ℃ baking for 8-10 min (instrument control error, actual set value is 9min), and the curing energy is 800-1000 mj/cm2(instrument control error, actual set value 900 mj/cm)2)；
Then plating a metal film layer on the surface of the metal film layer;
spraying finish paint with the model of PET00013A to the surface of the metal film layer to form a finish paint with the size of 12 microns, and then curing in a mode of baking at 60 ℃ for 8-10 min (instrument control error, actual set value is 9min), wherein the curing energy is 1000-1200 mj/cm2(instrument control error, actual set value is 1100mj/cm2)；
The appearance was tested by visual contrast: the water boiling and adhesive force performance is tested by referring to a method provided by GB/T9286-1998 grid test of paint films of colored paint and varnish; the test results are shown in table 3.
TABLE 3 primer Performance test
From the results in table 3, it is clear that if the 6-8 functionality acrylate emulsion, the 2-4 functionality acrylate emulsion and the aqueous alkoxylated UV monomer are out of the ranges specified in the present invention, the primer provided by the present invention has a serious appearance problem, and the boiling resistance is lowered and the adhesion is lowered.
In order to test the effect of the coating composition of the present invention when applied simultaneously, the effect of the coating compositions obtained in examples 1 to 3 and comparative examples 1 to 4 was tested, specifically, the test method was to form a composite coating of a primer, a metal plating layer and a top coat, the forming method was referred to the first aspect of this test example, and then the appearance was tested by visual contrast: the method provided by GB/T9286-1998 grid test of paint films of colored paint and varnish is referred to for testing water boiling, high temperature and high humidity and adhesion force: the hardness is tested by referring to a GB/T6739-; the shock abrasion resistance was tested in a germany ROSLER shock abrasion tester.
TABLE 4 Performance results for the coating compositions obtained in examples 1-3 and comparative examples 1-4.
The results in table 4 show that when the primer and topcoat combination of the coating composition provided by the present invention is applied, a coating layer with excellent appearance, medium resistance, wear resistance and adhesion can be obtained. When the proportion of the emulsion or other components is changed, the performance of the emulsion is obviously reduced.
In addition, compared with the test of the primer 1 in table 3, the effect of the obtained coating is equivalent to the result of the matching of the primer and the commercial finish (actually, the effect is more excellent, specifically, the vibration wear resistance effect and the medium resistance are improved after the primer and the finish provided by the invention are matched). The paint composition provided by the invention has synergistic effect of the primer and the top coat.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A coating composition, comprising: primer and finish;
the preparation raw materials of the primer comprise: 6-8 functionality acrylate emulsion, 2-4 functionality acrylate emulsion and water-based alkoxylated UV monomer;
the preparation raw materials of the finish paint comprise: the adhesive comprises 8-12 functionality aliphatic acrylic emulsion, 2-4 functionality epoxy modified polyurethane acrylic emulsion, anionic carboxylic acid modified acrylate emulsion and an adhesion promoter.
2. The coating composition of claim 1, wherein the primer is prepared from the following raw materials in parts by weight:
10-18 parts of 6-8 functionality acrylate emulsion; preferably, 40-60 parts of 2-4 functionality acrylate emulsion; preferably, 10-20 parts of the water-based alkoxylated UV monomer.
3. The coating composition of claim 1 or 2, wherein the primer is prepared from raw materials further comprising: at least one of a photoinitiator, a pH regulator, a cosolvent, an aqueous wetting agent, an aqueous leveling agent, an aqueous defoamer and an aqueous thixotropic agent.
4. The coating composition of claim 3, wherein the primer is prepared from the following raw materials in parts by weight: 2-6 parts of a photoinitiator; preferably, 0.05-0.2 part of pH regulator; preferably, 1-3 parts of cosolvent; preferably, 0.5-2 parts of water-based wetting agent; preferably, 0.5-2 parts of a water-based leveling agent; preferably, 0.1-0.4 part of water-based defoaming agent; preferably, 0.5-2 parts of water-based thixotropic agent.
5. The coating composition of claim 1, wherein the topcoat is prepared from the following raw materials in parts by weight:
20-60 parts of 8-12 functionality aliphatic acrylic emulsion; preferably, 20-40 parts of 2-4 functionality epoxy modified polyurethane acrylic emulsion; preferably, 2-6 parts of anionic carboxylic acid modified acrylate emulsion; preferably, the adhesion promoter accounts for 2-8 parts.
6. The coating composition of claim 1 or 5, wherein the raw materials for preparing the topcoat further comprise an isocyanate; preferably, the addition amount of the isocyanate is 4-8 parts by weight.
7. The coating composition as claimed in claim 1 or 5, wherein the raw materials for preparing the top coat further comprise: at least one of a photoinitiator, a pH regulator, a cosolvent, an aqueous wetting agent, an aqueous leveling agent, an aqueous defoamer and an aqueous thixotropic agent.
8. The coating composition of claim 7, wherein the topcoat is prepared from raw materials comprising, in parts by weight: 2-8 parts of a photoinitiator; preferably, 0.05-0.2 part of pH regulator; preferably, 1-5 parts of cosolvent; preferably, 0.5-2 parts of water-based wetting agent; preferably, 0.5-2 parts of a water-based leveling agent; preferably, 0.1-0.4 part of water-based defoaming agent; preferably, 0.5-2 parts of water-based thixotropic agent.
9. An electronic product characterized in that the surface is provided with a vacuum coating layer, and the raw materials for preparing the vacuum coating layer comprise the coating composition of any one of claims 1 to 8.
10. The electronic product of claim 9, wherein the vacuum coating layer comprises:
the primer film is prepared from the primer as a raw material and is attached to the surface of the electronic product;
the metal coating is arranged on the surface of the primer paint film;
the preparation raw material of the finish paint film is the finish paint, and the finish paint film is arranged on the surface of the metal coating;
preferably, the electronic products include mobile phones, cameras, notebook computers, desktop computers and tablet computers.
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| CN116410659A (en) * | 2021-12-31 | 2023-07-11 | 上海飞凯材料科技股份有限公司 | Coating composition, coating and application |
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