CN113583563B - Ultraviolet-curing outer seam coating for metal can and preparation method thereof - Google Patents
Ultraviolet-curing outer seam coating for metal can and preparation method thereof Download PDFInfo
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- CN113583563B CN113583563B CN202110820095.1A CN202110820095A CN113583563B CN 113583563 B CN113583563 B CN 113583563B CN 202110820095 A CN202110820095 A CN 202110820095A CN 113583563 B CN113583563 B CN 113583563B
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- 238000000576 coating method Methods 0.000 title claims abstract description 55
- 239000011248 coating agent Substances 0.000 title claims abstract description 52
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 39
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 39
- 229920002635 polyurethane Polymers 0.000 claims abstract description 39
- 239000004814 polyurethane Substances 0.000 claims abstract description 39
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 38
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 34
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 32
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 22
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000001588 bifunctional effect Effects 0.000 claims abstract description 19
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 239000003973 paint Substances 0.000 claims abstract 3
- 238000003756 stirring Methods 0.000 claims description 21
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 19
- 239000002318 adhesion promoter Substances 0.000 claims description 19
- 239000011259 mixed solution Substances 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 18
- 239000004698 Polyethylene Substances 0.000 claims description 16
- -1 polyethylene Polymers 0.000 claims description 16
- 229920000573 polyethylene Polymers 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 238000007639 printing Methods 0.000 abstract description 8
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000009512 pharmaceutical packaging Methods 0.000 description 1
- 125000001997 phenyl group Chemical class [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
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Abstract
The invention belongs to the technical field of coatings, and particularly relates to an ultraviolet-cured coating for an outer seam of a metal can and a preparation method thereof. The ultraviolet-curing outer seam coating for the metal can comprises the following components in parts by weight: 30-40 parts of bifunctional aliphatic polyurethane acrylic resin, 10-25 parts of trifunctional aliphatic polyurethane acrylic resin, 20-25 parts of isobornyl acrylate, 20-30 parts of 1, 6-hexanediol diacrylate, 0.1-0.2 part of silicon dioxide, 0.1-0.2 part of silicon carbide, 5-9 parts of photoinitiator and 2.5-5 parts of auxiliary agent. The curing film formed by the ultraviolet curing outside seam repair coating paint for the metal can has excellent adhesive force with printing ink, gloss oil and plain iron, better chemical resistance and better impact resistance.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to an ultraviolet-cured coating for repairing and coating an outer seam of a metal can and a preparation method thereof.
Background
The metal packaging container has flexibility and variability, can be made into various shapes to meet the packaging requirements of different products, has the advantages of bright color, rich layers, good visual effect and the like by metal printing, can realize the unique shape and the exquisite printing effect of the product by exquisite shape design, not only improves the durability and the retainability of the commodity, but also meets the requirements of people on the art of the printed matter of the packaging container. At present, metal packaging becomes an important component of the Chinese packaging industry, the output value of the metal packaging accounts for about 10 percent of the total output value of the Chinese packaging industry, and the metal packaging is widely applied to the fields of food packaging, pharmaceutical packaging, daily necessities packaging, instrument and meter packaging, industrial product packaging and the like.
After the metal printing stock is coated and printed, in order to prevent the welding position from rusting in the process of manufacturing the tank, the welding position needs to be coated with edge seam coating so as to meet the shelf life requirement of a client. At present, the coating for repairing and coating the outer seam of the metal can is mainly prepared by the traditional thermosetting process, the production energy consumption is high, the time is relatively long, the occupied area is large, and a large amount of solvent volatilizes in the production process to pollute the environment. The ultraviolet light curing (UV) process has low energy consumption and high efficiency, does not generate volatile solvent, and is an excellent process with energy saving, high efficiency and environmental protection.
In addition, the coating for repairing the outer seam of the metal can needs to have certain glossiness and good leveling property; the product does not turn yellow or change color in shelf life; has sufficient friction resistance and corrosion resistance; has good flexibility, impact resistance and other properties.
Therefore, there is a need in the art to develop a UV-curable exterior seam coating with comprehensive performance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an ultraviolet-curing outer seam coating for a metal can and a preparation method thereof.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight: 30-40 parts of bifunctional aliphatic polyurethane acrylic resin, 10-25 parts of trifunctional aliphatic polyurethane acrylic resin, 20-25 parts of isobornyl acrylate, 20-30 parts of 1, 6-hexanediol diacrylate, 0.1-0.2 part of silicon dioxide, 0.1-0.2 part of silicon carbide, 5-9 parts of photoinitiator and 2.5-5 parts of auxiliary agent.
Aiming at the characteristics of high processing resistance, high adhesive force requirement and the like of metal packaging, the invention adopts the aliphatic polyurethane acrylic resin which has excellent flexibility and chemical solvent resistance. In addition, the compounding of the bifunctional aliphatic polyurethane acrylic resin and the trifunctional aliphatic polyurethane acrylic resin can greatly improve the adhesive force of the coating, a printing surface and plain iron.
The isobornyl acrylate and the 1, 6-hexanediol diacrylate are mixed for use, so that the crosslinking degree and the curing efficiency of the coating can be improved, and the coating has more excellent processing resistance.
The silicon dioxide and the silicon carbide are added into the external seam coating, so that the defects of the coating can be reduced, and the corrosion resistance and the scratch resistance of the coating are obviously improved.
Preferably, the particle size of the silicon dioxide is 30-150 nm; more preferably, the silica has a particle size of 40 to 60 nm.
Preferably, the granularity of the silicon carbide is 30-150 nm; more preferably, the silicon carbide has a particle size of 40 to 60 nm.
Preferably, the photoinitiator is a mixture of three of photoinitiator-TPO, photoinitiator-907 and photoinitiator-1173. The absorption wavelength range of the photoinitiator TPO is 350-400nm, the absorption wavelength range of 907 is 260-320nm, the absorption wavelength range of 1173 is 240-260nm, the defect that the absorption wavelength of a single initiator is narrow can be overcome by compounding the three photoinitiators, all the wavelengths of 360-405 are covered, the utilization rate of ultraviolet light and the like of a production line is greatly improved, the curing efficiency is greatly improved, and the outer seam coating is not easy to yellow.
Preferably, the weight ratio of the photoinitiator-TPO, the photoinitiator-907 and the photoinitiator-1173 is 1: (0.1-0.2): 0.2-0.5.
Preferably, the auxiliary agent comprises a silane coupling agent, an adhesion promoter and wax.
Preferably, the weight ratio of the silane coupling agent to the adhesion promoter to the wax is 1-2: 1-2: 0.5 to 1; more preferably, the weight ratio of the silane coupling agent to the adhesion promoter to the wax is 1: 1: 0.5.
preferably, the wax is polyethylene wax.
The invention also provides a preparation method of the ultraviolet-curing outer seam coating for the metal can, which comprises the following steps:
mixing and stirring difunctional aliphatic polyurethane acrylic resin, trifunctional polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate, and stirring for 30-40 min to obtain a resin mixed solution;
adding silicon dioxide, silicon carbide, a photoinitiator and an auxiliary agent into the resin mixed solution, and continuously stirring until the mixture is uniformly mixed to prepare the ultraviolet curing outer seam coating of the metal can.
Preferably, the temperature is controlled to be 25-35 ℃ in the stirring process.
Compared with the prior art, the invention has the beneficial effects that:
the viscosity of the ultraviolet light cured outer seam coating is 20-30s (coating-4 cups, 125 ℃), and the coating has good adhesive force with plain iron, gloss oil and printing ink after forming a film, and the adhesive force reaches grade 1 through a Baige method.
According to the invention, the ultraviolet curing form is used for replacing the traditional thermosetting coating, and the selection of the active monomer and the photoinitiator can greatly improve the curing speed and reduce the process energy consumption, and the formed cured film has excellent wear resistance and flexibility, high chemical resistance and excellent impact resistance.
The photoinitiator and the oligomer adopted by the invention contain lower benzene series solvent. The cured product has no odor, is more environment-friendly, and meets the requirements of food packaging on sense.
Detailed Description
The technical solution of the present invention is further described below by means of specific examples.
Example 1:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight:
35 parts of bifunctional aliphatic polyurethane acrylic resin,
15 parts of trifunctional aliphatic polyurethane acrylic resin,
20 parts of isobornyl acrylate, 20 parts of,
20 parts of 1, 6-hexanediol diacrylate,
0.1 part of silicon dioxide, the particle size of the silicon dioxide is 100-150nm,
0.1 portion of silicon carbide, the granularity of the silicon dioxide is 100-150nm,
1.0 part of photoinitiator-TPO,
9070.2 parts of a photoinitiator,
11730.5 parts of a photoinitiator,
2 parts of a silane coupling agent, namely,
2 parts of an adhesion promoter, namely 2 parts of,
0.5 part of polyethylene wax.
Correspondingly, the preparation method of the ultraviolet-curable outer seam coating for the metal can comprises the following steps:
adding bifunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate into a reaction kettle according to the weight ratio, and stirring at 25-35 ℃ for 30-40 min to obtain a resin mixed solution;
and then adding silicon dioxide, silicon carbide, a photoinitiator, a silane coupling agent, an adhesion promoter and polyethylene wax into the resin mixed solution according to the proportion, and continuously stirring at 25-35 ℃ until the mixture is uniform to prepare the ultraviolet curing outer seam coating of the metal can.
Example 2:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight:
35 parts of bifunctional aliphatic polyurethane acrylic resin,
15 parts of trifunctional aliphatic polyurethane acrylic resin,
20 parts of isobornyl acrylate, 20 parts of,
20 parts of 1, 6-hexanediol diacrylate,
0.1 part of silicon dioxide, the particle size of the silicon dioxide is 40-60nm,
0.1 part of silicon carbide, the granularity of the silicon dioxide is 40-60nm,
1.0 part of photoinitiator-TPO,
9070.2 parts of a photoinitiator,
11730.5 parts of a photoinitiator,
2 parts of a silane coupling agent, namely,
2 parts of an adhesion promoter, namely 2 parts of,
0.5 part of polyethylene wax.
Correspondingly, the preparation method of the ultraviolet-curable outer seam coating for the metal can comprises the following steps:
adding bifunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate into a reaction kettle according to the weight ratio, and stirring at 25-35 ℃ for 30-40 min to obtain a resin mixed solution;
and then adding silicon dioxide, silicon carbide, a photoinitiator, a silane coupling agent, an adhesion promoter and polyethylene wax into the resin mixed solution according to the proportion, and continuously stirring at 25-35 ℃ until the mixture is uniform to prepare the ultraviolet curing outer seam coating of the metal can.
Example 3:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight:
35 parts of bifunctional aliphatic polyurethane acrylic resin,
15 parts of trifunctional aliphatic polyurethane acrylic resin,
20 parts of isobornyl acrylate, 20 parts of,
20 parts of 1, 6-hexanediol diacrylate,
0.1 part of silicon dioxide, the particle size of the silicon dioxide is 40-60nm,
0.1 part of silicon carbide, the granularity of the silicon dioxide is 40-60nm,
1.0 part of photoinitiator-TPO,
9070.2 parts of a photoinitiator,
11730.5 parts of a photoinitiator,
1.0 part of silane coupling agent,
1.0 part of an adhesion promoter, namely,
0.5 part of polyethylene wax.
Correspondingly, the preparation method of the ultraviolet-curable outer seam coating for the metal can comprises the following steps:
adding bifunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate into a reaction kettle according to the weight ratio, and stirring at 25-35 ℃ for 30-40 min to obtain a resin mixed solution;
and then adding silicon dioxide, silicon carbide, a photoinitiator, a silane coupling agent, an adhesion promoter and polyethylene wax into the resin mixed solution according to the proportion, and continuously stirring at 25-35 ℃ until the mixture is uniform to prepare the ultraviolet curing outer seam coating of the metal can.
Comparative example 1:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight:
50 parts of bifunctional aliphatic polyurethane acrylic resin,
20 parts of isobornyl acrylate, 20 parts of,
20 parts of 1, 6-hexanediol diacrylate,
0.1 part of silicon dioxide, the particle size of the silicon dioxide is 40-60nm,
0.1 part of silicon carbide, the granularity of the silicon dioxide is 40-60nm,
1.0 part of photoinitiator-TPO,
9070.2 parts of a photoinitiator,
11730.5 parts of a photoinitiator,
1.0 part of silane coupling agent,
1.0 part of an adhesion promoter,
0.5 part of polyethylene wax.
Correspondingly, the preparation method of the ultraviolet-curable outer seam coating for the metal can comprises the following steps:
adding bifunctional aliphatic polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate into a reaction kettle according to the weight ratio, and stirring at 25-35 ℃ for 30-40 min to obtain a resin mixed solution;
and then adding silicon dioxide, silicon carbide, a photoinitiator, a silane coupling agent, an adhesion promoter and polyethylene wax into the resin mixed solution according to the proportion, and continuously stirring at 25-35 ℃ until the mixture is uniform to prepare the ultraviolet curing outer seam coating of the metal can.
Comparative example 2:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight:
35 parts of bifunctional aliphatic polyurethane acrylic resin,
15 parts of trifunctional aliphatic polyurethane acrylic resin,
40 parts of isobornyl acrylate, 40 parts of,
0.1 part of silicon dioxide, the particle size of the silicon dioxide is 40-60nm,
0.1 part of silicon carbide, the granularity of the silicon dioxide is 40-60nm,
1.0 part of photoinitiator-TPO,
9070.2 parts of a photoinitiator,
11730.5 parts of a photoinitiator,
1.0 part of silane coupling agent,
1.0 part of an adhesion promoter,
0.5 part of polyethylene wax.
Correspondingly, the preparation method of the ultraviolet-curable outer seam coating for the metal can comprises the following steps:
adding bifunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin and isobornyl acrylate into a reaction kettle according to the weight ratio, and stirring at 25-35 ℃ for 30-40 min to obtain a resin mixed solution;
and then adding silicon dioxide, silicon carbide, a photoinitiator, a silane coupling agent, an adhesion promoter and polyethylene wax into the resin mixed solution according to the proportion, and continuously stirring at 25-35 ℃ until the mixture is uniform to prepare the ultraviolet curing outer seam coating of the metal can.
Comparative example 3:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight:
35 parts of bifunctional aliphatic polyurethane acrylic resin,
15 parts of trifunctional aliphatic polyurethane acrylic resin,
20 parts of isobornyl acrylate, 20 parts of,
20 parts of 1, 6-hexanediol diacrylate,
1.0 part of photoinitiator-TPO,
9070.2 parts of a photoinitiator,
11730.5 parts of a photoinitiator,
1.0 part of silane coupling agent,
1.0 part of an adhesion promoter,
0.5 part of polyethylene wax.
Correspondingly, the preparation method of the ultraviolet-curable outer seam coating for the metal can comprises the following steps:
adding bifunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate into a reaction kettle according to the weight ratio, and stirring at 25-35 ℃ for 30-40 min to obtain a resin mixed solution;
and then adding the photoinitiator, the silane coupling agent, the adhesion promoter and the polyethylene wax into the resin mixed solution according to the proportion, and continuously stirring at 25-35 ℃ until the mixture is uniform to prepare the ultraviolet curing outer seam coating of the metal can.
Comparative example 4:
the ultraviolet curing outer seam coating for the metal can comprises the following components in parts by weight:
35 parts of bifunctional aliphatic polyurethane acrylic resin,
15 parts of trifunctional aliphatic polyurethane acrylic resin,
20 parts of isobornyl acrylate, 20 parts of,
20 parts of 1, 6-hexanediol diacrylate,
0.1 part of silicon dioxide, the particle size of the silicon dioxide is 40-60nm,
0.1 part of silicon carbide, the granularity of the silicon dioxide is 40-60nm,
2.0 parts of photoinitiator-TPO,
1.0 part of silane coupling agent, namely,
1.0 part of an adhesion promoter,
0.5 part of polyethylene wax.
Correspondingly, the preparation method of the ultraviolet-curable outer seam coating for the metal can comprises the following steps:
adding bifunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate into a reaction kettle according to the weight ratio, and stirring at 25-35 ℃ for 30-40 min to obtain a resin mixed solution;
and then adding silicon dioxide, silicon carbide, a photoinitiator, a silane coupling agent, an adhesion promoter and polyethylene wax into the resin mixed solution according to the proportion, and continuously stirring at 25-35 ℃ until the mixture is uniform to prepare the ultraviolet curing outer seam coating of the metal can.
The metallic printing coatings of examples 1-3 and comparative examples 1-4 were compared in terms of their properties, and the results are shown in the following table:
therefore, the ultraviolet light curing exterior seam coating can meet the requirements of construction and products, and a formed curing film has excellent adhesive force with printing ink, gloss oil and plain iron, better chemical resistance and better impact resistance.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims. While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (5)
1. The ultraviolet-curing exterior seam coating for the metal can is characterized by comprising the following components in parts by weight: 30-40 parts of bifunctional aliphatic polyurethane acrylic resin, 10-25 parts of trifunctional aliphatic polyurethane acrylic resin, 20-25 parts of isobornyl acrylate, 20-30 parts of 1, 6-hexanediol diacrylate, 0.1-0.2 part of silicon dioxide, 0.1-0.2 part of silicon carbide, 5-9 parts of photoinitiator and 2.5-5 parts of auxiliary agent;
the photoinitiator is a mixture of three photoinitiators, namely photoinitiator-TPO, photoinitiator-907 and photoinitiator-1173, and the weight ratio of the photoinitiator-TPO, the photoinitiator-907 and the photoinitiator-1173 is 1: (0.1-0.2): 0.2-0.5;
the auxiliary agent comprises a silane coupling agent, an adhesion promoter and wax;
the weight ratio of the silane coupling agent to the adhesion promoter to the wax is 1-2: 1-2: 0.5-1.
2. The ultraviolet light-curable exterior seam coating for metal cans according to claim 1, wherein the silica has a particle size of 30-150 nm; the granularity of the silicon carbide is 30-150 nm.
3. The ultraviolet-curable paint for the outer edge seam of the metal can as claimed in claim 2, wherein the particle size of the silicon dioxide is 40-60nm, and the particle size of the silicon carbide is 40-60 nm.
4. The uv-curable bead filler coating for metal cans of claim 1, wherein said wax is polyethylene wax.
5. A method for preparing the ultraviolet-curable outer seam paint for the metal cans according to any one of claims 1 to 4, which comprises the following steps:
mixing and stirring bifunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin, isobornyl acrylate and 1, 6-hexanediol diacrylate, and stirring for 30-40 min to obtain a resin mixed solution;
adding silicon dioxide, silicon carbide, a photoinitiator and an auxiliary agent into the resin mixed solution, and continuously stirring until the mixture is uniformly mixed to prepare the ultraviolet curing outer seam coating of the metal can.
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| CN1772820A (en) * | 2004-11-10 | 2006-05-17 | 比亚迪股份有限公司 | Ultraviolet cured paint for plastics and its production process |
| US20150056412A1 (en) * | 2012-03-26 | 2015-02-26 | 3M Innovative Properties Company | Article and method of making the same |
| CN106905731B (en) * | 2017-04-11 | 2019-01-15 | 江苏雅恩新材料科技有限公司 | The dedicated weld seam oil of the efficient curing metal tin graphed sheet of multiband, preparation method and application |
| CN109679488A (en) * | 2018-12-28 | 2019-04-26 | 上海维凯光电新材料有限公司 | A kind of high-temperature resistant, cracking resistance ultraviolet cured paint composition and preparation method thereof |
| CN112063290A (en) * | 2020-08-03 | 2020-12-11 | 珠海展辰新材料股份有限公司 | Ultraviolet-curing matte clear-surface woodenware coating and preparation method thereof |
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