CN111087918A - High-heat-resistance UV aluminum-plated coating composition and preparation method thereof - Google Patents
High-heat-resistance UV aluminum-plated coating composition and preparation method thereof Download PDFInfo
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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
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J2463/10—Epoxy resins modified by unsaturated compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention provides a high heat-resistant UV aluminized coating composition and a preparation method thereof; the composition comprises the following components in parts by weight: prepolymer: 30-55 parts of a binder; monomer reactive diluent: 40-65 parts; photoinitiator (2): 3-8 parts; silane coupling agent: 1-2 parts; an adhesion promoter: 0 to 2 parts. Compared with the prior art, the UV coating has excellent aluminizing fastness and good flexibility, does not stick to a plate in the imprinting and curing process of a metal mold with a deep groove, is easy to demould, and can be used for preparing a film with a pattern; and secondly, the UV coating has excellent heat resistance, is not easy to deform, has long timeliness, and can meet the requirement of further high-temperature composite processing occasions.
Description
Technical Field
The invention belongs to the technical field of UV (ultraviolet) coatings, and particularly relates to a high-heat-resistance UV aluminized coating composition and a preparation method thereof.
Background
The aluminizer is a composite flexible packaging material formed by plating a layer of extremely thin metal aluminum on the surface of a plastic film by adopting a special process, and has metallic luster. Because the aluminum foil packaging material has the characteristics of a plastic film and a metal, the aluminum foil packaging material is a packaging material which is cheap, attractive, excellent in performance and strong in practicability, and replaces an aluminum foil to a certain extent.
In the household appliance industry, the aluminum-plated film is compounded on the surface of the steel plate to replace a metal plate with special decorative appearance characteristics. Such as a wire drawing pattern, has good appearance effect. Compared with the traditional method for processing the patterns on the metal plate, the method simplifies the production process, obviously reduces the cost and the waste of raw materials, unfortunately, the aluminizer can cover the metal luster while manufacturing various colors and patterns on the thin film layer, and loses the special texture of the metal material.
In order to prepare the aluminized composite plate with the metallic luster, the aluminized composite steel plate with the pattern on the coating layer can be used to realize the good metallic luster effect from the gradual development of a multi-layer film material composite technology to the present. In actual production, the coating layer is usually first patterned by using an imprinting process, and then the coated surface is vacuum aluminized, so as to obtain an aluminized film with high metallic luster and a certain pattern. And finally, attaching the aluminized layer of the base film to the plate through glue under a high-temperature condition to obtain the high-metallic-luster aluminized film composite plate with the specific pattern. Here, a PET film is generally used as the base film, and a steel plate is generally used as the plate. To achieve the above production process, the coatings that need to be used have the following characteristics: 1. the adhesive force to the PET basal membrane is good, and the flexibility is good; 2. the high-gloss aluminum plating film has excellent conventional aluminum plating fastness and high-temperature resistance, namely, the high-gloss aluminum plating film still maintains high gloss and high aluminum plating fastness after high-temperature treatment. 3. Since the patterned mold is often a metal mold (e.g., nickel plate, steel plate, etc.), the coating material should have good releasability. 4. The coating is solvent-free UV curing coating and has no pollution to the environment. The existing UV coating is difficult to take the above points into consideration. Coatings, while having high aluminum plating fastness, tend to result in post-cure release difficulties. And under the high temperature condition, the fastness of the coating to the aluminum plating layer can be reduced violently, so that the coating and the aluminum plating layer are easy to separate after high-temperature compounding, and the glossiness of the film is obviously reduced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a high-heat-resistance UV aluminizing coating composition and a preparation method thereof.
In particular to a high heat-resistant UV aluminizing coating composition of a PET (polyethylene terephthalate) base film for steel plate compounding and a preparation method thereof, aiming at solving the problems that the fastness of an aluminized layer of the existing aluminized coating is sharply reduced in a high-temperature compounding process, and the high aluminized fastness and the good demoulding property are difficult to be considered.
The invention is realized by the following technical scheme:
in a first aspect, the present invention provides a high heat resistant UV aluminized coating composition, which includes the following components in parts by weight:
prepolymer: 30-55 parts of a binder;
monomer reactive diluent: 40-65 parts;
photoinitiator (2): 3-8 parts;
silane coupling agent: 1-2 parts;
an adhesion promoter: 0 to 2 parts.
Preferably, the high heat-resistant UV aluminized coating composition comprises the following components in parts by weight:
prepolymer: 43 parts of a mixture;
monomer reactive diluent: 50 parts of a mixture;
photoinitiator (2): 5 parts of a mixture;
silane coupling agent: 1.5 parts;
an adhesion promoter: 0.5 part.
Optionally, the prepolymer is at least one of aliphatic urethane acrylate and epoxy acrylate.
More preferably, the aliphatic polyurethane acrylate is at least one of high-official aliphatic polyurethane (functionality is more than or equal to 6) and low-official aliphatic polyurethane (functionality is less than or equal to 3). Wherein the high functionality aliphatic polyurethane acrylate is characterized by high temperature resistance, good weather resistance and good wear resistance. The low functionality aliphatic polyurethane acrylate is characterized by good adhesion, good flexibility, low shrinkage and high curing rate.
Preferably, the aliphatic polyurethane acrylate is a compound of high-official aliphatic polyurethane acrylate with functionality more than or equal to 6 and low-official aliphatic polyurethane acrylate with functionality less than or equal to 3 in a mass ratio of 0.45-1.41: 1; the advantages of high-official aliphatic urethane acrylate high temperature resistance and good adhesion of low-official aliphatic urethane acrylate are combined. It is to be noted that above this range tends to result in poor coating flexibility and low adhesion; if the amount is less than this range, the heat resistance of the coating layer tends to be poor and the releasability tends to be poor.
Optionally, the epoxy acrylate is at least one of bisphenol epoxy acrylate, novolac epoxy acrylate and modified epoxy acrylate.
Preferably, the prepolymer is compounded by aliphatic polyurethane acrylate and epoxy acrylate in a mass ratio of 1.45-5: 1; the characteristics of good flexibility of polyurethane, high adhesion to metal, high curing rate of epoxy acrylate and good adhesion to a base film are combined. It is to be noted that when it is higher than this range, poor fastness to the base film and poor releasability tend to result. Below this range, poor coating flexibility is likely to result.
Optionally, the monomer reactive diluent is one or a mixture of more of hydroxyethyl methacrylate, ethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate, hydroxypropyl acrylate, lauryl acrylate, butyl acrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, isoborneol acrylate, 1, 6-hexanediol diacrylate, ethoxylated 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, phenylacetyl morpholine, pentaerythritol triacrylate, and dipentaerythritol pentaacrylate.
Optionally, the silane coupling agent is at least one of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane and gamma-mercaptopropyltrimethoxysilane.
Optionally, the adhesion promoter is at least one of a phosphate ester acrylate compound or an acrylate compound with a carboxyl group. Wherein, the phosphate ester adhesion promoter mainly increases the adhesion force through the action of acid bonds and the metal surface, and has larger action due to lower addition amount; such as 2-hydroxyethyl methacrylate phosphate.
Optionally, the photoinitiator is one or more of dialkoxyacetophenone, dimethylbenzyl ketal, 2-hydroxy-2-methyl-1-propylphenone, 1-hydroxy-cyclohexylphenone, 2,4,6, -trimethylbenzoyl diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide, and benzophenone.
The heat-resistant UV aluminized coating composition can be prepared by the following method:
firstly, heating 30-55 parts of prepolymer to 60-65 ℃, preserving heat for 20-40 minutes, adding the prepolymer into 40-65 parts of monomer reactive diluent, stirring at medium speed for uniform dispersion (dispersing for 30-50 minutes), and adding a photoinitiator; and (3) uniformly stirring at medium speed (dispersing for 20-30 minutes), adding the silane coupling agent and the adhesion promoter, and uniformly stirring at medium speed (dispersing for 10-20 minutes).
Preferably, the rotation speed of the medium-speed stirring is 500-700 rpm.
The invention also provides a preparation method of the high heat-resistant aluminized film with the pattern, which comprises the following steps: the high heat-resistant UV aluminized coating composition is coated on a metal mold with a grain groove and covered with a base film, and then is subjected to imprinting and curing, and further is subjected to vacuum aluminizing to obtain a high heat-resistant aluminized film with a pattern.
Preferably, the curing is UV curing, and the curing energy is 100-300 mJ/cm2。
Compared with the prior art, the invention has the following beneficial effects:
1. by adopting the UV formula and the curing process, the production efficiency is high, the energy consumption is low, no solvent is volatilized, and no pollution is caused to the environment;
2. the coating has excellent aluminizing fastness and demolding performance, does not adhere to a plate in the impressing and curing process of a metal mold with deep grooves, is easy to demold, can be used for preparing a film with patterns, and has high film forming flexibility;
3. the aluminizer prepared by the coating has excellent heat resistance, is not easy to deform in patterns and long in timeliness, and can meet the requirements of further high-temperature (>200 ℃) composite processing occasions.
Detailed Description
The present invention will be described in detail with reference to examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be apparent to those skilled in the art that several modifications and improvements can be made without departing from the inventive concept. All falling within the scope of the present invention.
In the following examples and comparative examples, high-official aliphatic polyurethane was sandoman CN9110, low-official aliphatic polyurethane was sandoman SD1173, modified epoxy acrylate was sandoman CN151, bisphenol a-type epoxy acrylate was sandoman CN104, and phosphate adhesion promoter was PM-2. In the present invention, the high-molecular aliphatic polyurethane, the low-molecular aliphatic polyurethane, the modified epoxy acrylate, the bisphenol a type epoxy acrylate, and the phosphate type adhesion promoter are not limited to the specific manufacturers and types listed above.
Example 1
The embodiment relates to a heat-resistant UV aluminized coating composition and a preparation method thereof, and the heat-resistant UV aluminized coating composition comprises the following process steps:
(1) putting 23 parts of 1, 6-hexanediol diacrylate, 15 parts of ethoxylated trimethylolpropane triacrylate and 27 parts of isoborneol acrylate into a reaction kettle, and stirring and dispersing at a low speed of 200rpm for 15 minutes;
(2) heating 10 parts of high-official aliphatic polyurethane, 15 parts of low-official aliphatic polyurethane and 5 parts of modified epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the mixture into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at a rotating speed of 500rpm for 60 minutes;
(3) adding 4 parts of 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, and stirring and dispersing at a rotating speed of 500rpm for 40 minutes;
(4) 1 part of gamma-aminopropyltrimethoxysilane was added and dispersed at a rotation speed of 500rpm with moderate stirring for 30 minutes to obtain a clear mixture.
Example 2
The embodiment relates to a preparation method of a heat-resistant UV aluminized coating composition, which comprises the following process steps:
(1) putting 16 parts of hydroxyethyl methacrylate, 20 parts of ethoxylated 1, 6-hexanediol diacrylate and 10 parts of isoborneol acrylate into a reaction kettle, and stirring and dispersing at a low speed of 300rpm for 8 minutes;
(2) heating 25 parts of high-official aliphatic polyurethane, 5 parts of modified epoxy acrylate and 5 parts of bisphenol A epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the mixture into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at a rotating speed of 700rpm for 40 minutes;
(3) adding 4 parts of 2-hydroxy-2-methyl-1-propyl benzophenone and 1 part of benzophenone, and stirring and dispersing at a rotating speed of 700rpm for 30 minutes;
(4) adding 2 parts of 3-glycidyl ether oxypropyltrimethoxysilane and 2 parts of phosphate adhesion promoter, and stirring and dispersing at a rotating speed of 700rpm for 20 minutes to obtain a clear mixture;
example 3
The embodiment relates to a preparation method of a heat-resistant UV aluminized coating composition, which comprises the following process steps:
(1) 20 parts of 1, 6-hexanediol diacrylate, 7 parts of ethoxylated trimethylolpropane triacrylate and 23 parts of isoborneol acrylate are put into a reaction kettle and stirred and dispersed at a low speed of 250rpm for 10 minutes;
(2) heating 10 parts of high-official aliphatic polyurethane, 22 parts of low-official aliphatic polyurethane and 11 parts of bisphenol A epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the mixture into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at a rotating speed of 600rpm for 50 minutes;
(3) adding 3 parts of 2-hydroxy-2-methyl-1-propylbenzophenone and 2 parts of 2,4, 6-trimethylbenzoyldiphenylphosphine oxide, and stirring at the rotating speed of 600rpm for dispersing for 35 minutes;
(4) adding 1.5 parts of gamma-aminopropyltrimethoxysilane and 0.5 part of phosphate adhesion promoter, and stirring and dispersing at the rotating speed of 600rpm for 25 minutes to obtain a clear mixture;
example 4
The embodiment relates to a preparation method of a heat-resistant UV aluminized coating composition, which comprises the following process steps:
(1) putting 12 parts of hydroxypropyl acrylate, 25 parts of phenylacetyl morpholine and 8 parts of pentaerythritol triacrylate into a reaction kettle, and stirring and dispersing at a low speed of 220rpm for 10 minutes;
(2) heating 17 parts of high-official aliphatic polyurethane, 12 parts of low-official aliphatic polyurethane and 20 parts of modified epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the mixture into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at the rotation speed of 550rpm for 55 minutes at a medium speed;
(3) adding 3 parts of 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, and stirring and dispersing at the rotating speed of 600rpm for 35 minutes;
(4) adding 1.5 parts of gamma-aminopropyltriethoxysilane and 1.5 parts of phosphate adhesion promoter, and stirring and dispersing at a rotating speed of 650rpm for 20 minutes to obtain a clear mixture;
example 5
The embodiment relates to a preparation method of a heat-resistant UV aluminized coating composition, which comprises the following process steps:
(1) putting 25 parts of phenylacetyl morpholine, 5 parts of pentaerythritol triacrylate and 10 parts of 1, 6-hexanediol diacrylate into a reaction kettle, and stirring and dispersing at a low speed of 260rpm for 10 minutes;
(2) heating 15 parts of high-official aliphatic polyurethane, 22 parts of low-official aliphatic polyurethane and 18 parts of modified epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the mixture into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at a rotating speed of 650rpm for 45 minutes;
(3) adding 4 parts of 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, and stirring and dispersing at a rotating speed of 650rpm for 30 minutes;
(4) 1 part of gamma-aminopropyltriethoxysilane was added and dispersed at 550rpm with moderate stirring for 28 minutes to give a clear mixture.
Comparative example 1
The comparative example is used for comparing and explaining the aqueous laser aluminizing transfer coating and the preparation method thereof, only epoxy acrylic resin is used, and the preparation method comprises the following process steps:
(1) putting 10 parts of 1, 6-hexanediol diacrylate, 7 parts of ethoxylated trimethylolpropane triacrylate and 33 parts of isoborneol acrylate into a reaction kettle, and stirring and dispersing at a low speed of 250rpm for 10 minutes;
(2) heating 43 parts of bisphenol A epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the bisphenol A epoxy acrylate into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at a rotating speed of 600rpm for 50 minutes;
(3) adding 3 parts of 2-hydroxy-2-methyl-1-propylbenzophenone and 2 parts of 2,4, 6-trimethylbenzoyldiphenylphosphine oxide, and stirring at the rotating speed of 600rpm for dispersing for 35 minutes;
(4) adding 1.5 parts of 3-glycidyl ether oxypropyltrimethoxysilane and 0.5 part of phosphate adhesion promoter, and stirring and dispersing at a rotating speed of 600rpm for 25 minutes to obtain a clear mixture;
comparative example 2
This comparative example provides a commercially available UV gloss oil 800 from Cheng beauty industries, Inc.
Comparative example 3
(1) Putting 23 parts of 1, 6-hexanediol diacrylate, 15 parts of ethoxylated trimethylolpropane triacrylate and 27 parts of isoborneol acrylate into a reaction kettle, and stirring and dispersing at a low speed of 200rpm for 15 minutes;
(2) heating 15 parts of high-official aliphatic polyurethane and 15 parts of low-official aliphatic polyurethane to 60 ℃, preserving heat for 30 minutes, then adding the heated high-official aliphatic polyurethane and 15 parts of low-official aliphatic polyurethane into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at a rotating speed of 500rpm for 60 minutes;
(3) adding 4 parts of 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, and stirring and dispersing at a rotating speed of 500rpm for 40 minutes;
(4) 1 part of gamma-aminopropyltrimethoxysilane was added and dispersed at a rotation speed of 500rpm with moderate stirring for 30 minutes to obtain a clear mixture.
Comparative example 4
(1) Putting 16 parts of hydroxyethyl methacrylate, 20 parts of ethoxylated 1, 6-hexanediol diacrylate and 10 parts of isoborneol acrylate into a reaction kettle, and stirring and dispersing at a low speed of 300rpm for 8 minutes;
(2) heating 25 parts of tetra-official aliphatic polyurethane (sartomer CN8007 NS), 5 parts of modified epoxy acrylate and 5 parts of bisphenol A epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the mixture into the stirred monomer reactive diluent in the step (1), and stirring and dispersing at a rotating speed of 700rpm for 40 minutes;
(3) adding 4 parts of 2-hydroxy-2-methyl-1-propyl benzophenone and 1 part of benzophenone, and stirring and dispersing at a rotating speed of 700rpm for 30 minutes;
(4) 2 parts of 3-glycidyl ether oxypropyltrimethoxysilane and 2 parts of phosphate adhesion promoter are added, and the mixture is stirred and dispersed at a rotation speed of 700rpm for 20 minutes to obtain a clear mixture.
Comparative example 5
(1) Putting 23 parts of 1, 6-hexanediol diacrylate, 15 parts of ethoxylated trimethylolpropane triacrylate and 27 parts of isoborneol acrylate into a reaction kettle, and stirring and dispersing at a low speed of 200rpm for 15 minutes;
(2) heating 10 parts of high-official aliphatic polyurethane, 15 parts of low-official aliphatic polyurethane and 5 parts of modified epoxy acrylate to 60 ℃, preserving heat for 30 minutes, then adding the mixture into the monomer reactive diluent stirred in the step (1), and stirring and dispersing at a rotating speed of 500rpm for 60 minutes;
(3) 4 parts of 2,4, 6-trimethylbenzoyldiphenylphosphine oxide were added and dispersed at a rotation speed of 500rpm for 40 minutes with moderate stirring to obtain a clear mixture.
The performance ratios of the above examples and comparative examples are shown in table 1 below:
the test method comprises the following steps:
1. demolding property: respectively coating the coating composition on a PET film, embossing, and UV curing with a curing energy of 200mJ/cm2(ii) a It was observed whether the coating separated well from the mold.
2. Flexibility: respectively coating the coating composition on a PET film, embossing, and UV curing with a curing energy of 200mJ/cm2(ii) a And (5) folding the film with the coating surface facing outwards, and observing whether the coating is cracked or not.
3. Adhesion of a base film: respectively coating the coating composition on a PET film, embossing, and UV curing with a curing energy of 200mJ/cm2(ii) a The adhesion of the base film was tested by the "Baige method".
4. Aluminum plating fastness: respectively coating the coating composition on a metal mold with grain grooves and covering a PET film, impressing, and UV curing with curing energy of 200mJ/cm2Further vacuum aluminizing to obtain a high heat-resistant aluminized film with patterns; the aluminium plating fastness was tested by the "check method".
5. Heat resistance: respectively coating the coating composition on a metal mold with grain grooves and covering a PET film, impressing, and UV curing with curing energy of 200mJ/cm2Further vacuum aluminizing to obtain a high heat-resistant aluminized film with patterns; after a period of time in an oven at 200 ℃, the coating appearance was observed.
6. Peeling force: respectively coating the coating composition on a metal mold with grain grooves and covering a PET film, impressing, and UV curing with curing energy of 200mJ/cm2Further vacuum aluminizing to obtain a high heat-resistant aluminized film with patterns; and (3) further attaching the aluminum-plated film with the pattern to a steel plate through a hot melt adhesive, and measuring the stripping force by using a universal tensile testing machine.
7. Cupping value: respectively coating the coating composition on a metal mold with grain grooves and covering a PET film, impressing, and UV curing with curing energy of 200mJ/cm2Further vacuum aluminizing to obtain a high heat-resistant aluminized film with patterns; and (3) further laminating the aluminum-plated film with the pattern with a steel plate through hot melt adhesive, and measuring the cupping value by using a cupping instrument.
TABLE 1
The test results of the comparative examples 1-5 and the comparative examples 1-5 show that the UV aluminized coating prepared by the technical scheme provided by the invention has high base film adhesion and flexibility, and meanwhile, the aluminized fastness and the heat resistance are excellent. And the cupping value of the aluminized film compounded by the high-temperature hot-pressing process is superior to the market demand.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. The high-heat-resistance UV aluminized coating composition is characterized by comprising the following components in parts by weight:
prepolymer: 30-55 parts of a binder;
monomer reactive diluent: 40-65 parts;
photoinitiator (2): 3-8 parts;
silane coupling agent: 1-2 parts;
an adhesion promoter: 0 to 2 parts.
2. The high heat UV aluminized coating composition according to claim 1, wherein the prepolymer is at least one of an aliphatic urethane acrylate and an epoxy acrylate.
3. The high heat resistant UV aluminized coating composition according to claim 2, characterized in that the aliphatic urethane acrylate is at least one of a high-official aliphatic urethane acrylate having a functionality of not less than 6 and a low-official aliphatic urethane acrylate having a functionality of not more than 3.
4. The high-heat-resistance UV aluminized coating composition according to claim 3, wherein the aliphatic polyurethane acrylate is a compound of high-official aliphatic polyurethane acrylate with functionality not less than 6 and low-official aliphatic polyurethane acrylate with functionality not more than 3 in a mass ratio of 0.45-1.41: 1.
5. The high heat resistant UV aluminized coating composition according to claim 2, wherein the epoxy acrylate is at least one of a bisphenol epoxy acrylate, a novolac epoxy acrylate, and a modified epoxy acrylate.
6. The high-heat-resistance UV aluminized coating composition according to claim 4 or 5, characterized in that the prepolymer is a compound of aliphatic polyurethane acrylate and epoxy acrylate in a mass ratio of 1.45-5: 1.
7. A high heat resistant UV aluminized coating composition according to claim 1, characterized in that the monomer reactive diluent is at least one of hydroxyethyl methacrylate, ethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate, hydroxypropyl acrylate, lauryl acrylate, butyl acrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, isobornyl acrylate, 1, 6-hexanediol diacrylate, ethoxylated 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, phenylacetyl morpholine, pentaerythritol triacrylate, dipentaerythritol pentaacrylate.
8. The highly heat resistant UV aluminum plating coating composition according to claim 1, wherein the silane coupling agent is at least one of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane; the adhesion promoter is at least one of phosphate acrylate compounds or acrylate compounds with carboxyl groups; the photoinitiator is at least one of dialkoxyacetophenone, dimethylbenzyl ketal, 2-hydroxy-2-methyl-1-propylphenone, 1-hydroxy-cyclohexylphenone, 2,4, 6-trimethylbenzoyl diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide and benzophenone.
9. A method for preparing a high heat resistant UV aluminized coating composition according to claim 1, comprising the steps of:
heating the prepolymer to 60-65 ℃, preserving heat for 20-40 minutes, adding the prepolymer into a monomer reactive diluent, dispersing at a medium speed for 30-50 minutes, adding a photoinitiator, dispersing at a medium speed for 20-30 minutes, adding a silane coupling agent and an adhesion promoter, and dispersing at a medium speed for 10-20 minutes; and stirring uniformly to obtain the high heat-resistant UV aluminized coating composition.
10. A method for preparing a high heat-resistant aluminized film with a pattern is characterized by comprising the following steps: coating the high heat-resistant UV aluminized coating composition according to claim 1 on a metal mold with a grain groove and covering a base film, imprinting and curing, and further carrying out vacuum aluminizing to obtain a high heat-resistant aluminized film with a pattern; the curing is UV curing, and the curing energy is 100-300 mJ/cm2。
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