CN112322158A

CN112322158A - Flame-retardant UV oxidation dual-curing three-proofing paint and preparation method thereof

Info

Publication number: CN112322158A
Application number: CN202011335575.0A
Authority: CN
Inventors: 周练
Original assignee: Shanghai Kufu New Material Co ltd
Current assignee: Shanghai Kufu New Material Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-02-05

Abstract

The invention belongs to the technical field of three-proofing paint, and particularly relates to flame-retardant UV oxidation dual-curing three-proofing paint and a preparation method thereof. The invention provides a flame-retardant UV oxidation dual-curing three-proofing paint, which comprises the following preparation raw materials in parts by weight: 30-60 parts of isocyanate acrylate modified alkyd resin, 0-20 parts of acrylic resin, 0.1-1.8 parts of oximino compound, 0.01-0.5 part of fluorescent indicator, 0.5-8 parts of initiator, 0.5-5 parts of silane coupling agent, 0.1-3 parts of defoaming agent and 0.3-3 parts of drier. The three-proofing paint prepared by the method has better high and low temperature resistance and has bearing capacity on heat generated by a circuit board; and a large number of experiments of the applicant prove that the three-proofing paint prepared by the method has better adhesive force and flame retardant property. The three-proofing paint prepared by the synergistic effect of the three-proofing paint, a drier, an oxime compound and modified resin has better flame retardant performance, and shows a 94-V0 result in a flammability UL94 grade test.

Description

Flame-retardant UV oxidation dual-curing three-proofing paint and preparation method thereof

Technical Field

The invention belongs to the technical field of three-proofing paint, and particularly relates to flame-retardant UV oxidation dual-curing three-proofing paint and a preparation method thereof.

Background

The three-proofing paint is also called PCB electronic circuit board protection oil, coating oil, damp-proof paint, three-proofing coating, waterproof glue, insulating paint, anti-corrosion paint, salt fog-proof paint, dustproof paint, protection paint, coating paint, three-proofing glue and the like.

While the presence of contaminants on the printed circuit board has a significant impact on the circuit board. Can lead to electronic decay of the circuit board, corrosion of the conductor and even irreparable short circuit. Contaminants most commonly found in electrical systems may be residual chemicals from the process. Such contaminants include fluxing agents, solvent release agents, metal particles, marking inks, and the like. Also, the main contamination groups are caused by carelessness during manual work, such as human body grease, fingerprints, cosmetics and food debris. There are also many contaminants in the operating environment, such as salt sprays, sand, fuel, acids, and other corrosive vapors and mold.

In addition, the circuit board generates heat during the use process, which causes over-high local temperature and even causes the danger of circuit board burning.

Disclosure of Invention

In order to solve the technical problems, the first aspect of the invention provides a flame-retardant UV oxidation dual-curing three-proofing paint, which comprises the following preparation raw materials in parts by weight:

30-60 parts of isocyanate acrylate modified alkyd resin,

0 to 20 parts of an acrylic resin,

0.1 to 1.8 parts of an oximino compound,

0.01 to 0.5 parts of a fluorescent indicator,

0.5 to 8 parts of an initiator,

0.5 to 5 parts of a silane coupling agent,

0.1 to 3 portions of defoaming agent,

0.3-3 parts of drier.

As a preferred technical scheme, the preparation raw materials of the isocyanate acrylate modified alkyd resin comprise the following components in percentage by weight: 15-17 wt% of vegetable oleic acid, 9-11 wt% of monopentaerythritol, 3-5 wt% of trihydric alcohol, 12-14 wt% of phthalic anhydride, 8-10 wt% of benzoic acid, 0.05-0.15 wt% of color reducing agent, 4-10 wt% of isocyanate acrylate, 0.03-0.05 wt% of dibutyltin dilaurate and the balance of propylene monomers to 100 wt%.

As a preferred technical scheme, the isocyanate acrylate is selected from isocyanate ethyl acrylate and/or isocyano ethyl methacrylate.

As a preferable technical scheme, the propylene monomer is selected from one or more of isobornyl acrylate, ethoxy ethyl acrylate and acryloyl morpholine.

5. The flame-retardant UV-oxidation dual-curing tri-proof paint according to claim 2, wherein the vegetable oleic acid is selected from dry vegetable oleic acid and/or semi-dry vegetable oleic acid.

As a preferable technical solution, the acrylate resin is at least one selected from urethane acrylate resin, epoxy acrylate resin, and polyester acrylate resin.

As a preferable technical scheme, the oxime compound is selected from at least one of methyl ethyl ketoxime, cyclohexanone oxime and butyraldehyde oxime.

As a preferable technical scheme, the drier is selected from at least one of cobalt isooctanoate, manganese isooctanoate, calcium isooctanoate, zinc isooctanoate and rare earth isooctanoate.

As a preferred technical scheme, the silane coupling agent is selected from at least one of 3-methacryloxypropylmethyldimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, methacryloxypropyltriisopropoxysilane, vinyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane and vinyltriacetoxysilane.

The invention provides a preparation method of a flame-retardant UV oxidation dual-curing three-proofing paint, which comprises the following steps:

adding isocyanate acrylate modified alkyd resin, acrylate, an initiator, an oxime compound, a silane coupling agent, a defoaming agent and a fluorescent indicator into the reaction kettle in sequence, and stirring uniformly to obtain the product.

Has the advantages that: the three-proofing paint prepared by the method has better high and low temperature resistance and has bearing capacity on heat generated by a circuit board; and a large number of experiments of the applicant prove that the three-proofing paint prepared by the method has better adhesive force and flame retardant property. The three-proofing paint prepared by the synergistic effect of the three-proofing paint, a drier, an oxime compound and modified resin has better flame retardant performance, and shows a 94-V0 result in a flammability UL94 grade test.

Detailed Description

The invention will be further understood by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definitions provided herein, the definition of the term provided herein controls.

As used herein, a feature that does not define a singular or plural form is also intended to include a plural form of the feature unless the context clearly indicates otherwise. It will be further understood that the term "prepared from …" is synonymous with "comprising," including, "comprising," "having," "including," and/or "containing," when used in this specification, means that the recited composition, step, method, article, or device is present, but does not preclude the presence or addition of one or more other compositions, steps, methods, articles, or devices. Furthermore, the use of "preferred," "preferably," "more preferred," etc., when describing embodiments of the present application, is meant to refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

30-60 parts of isocyanate acrylate modified alkyd resin,

0 to 20 parts of an acrylic resin,

0.1 to 1.8 parts of an oximino compound,

0.01 to 0.5 parts of a fluorescent indicator,

0.5 to 8 parts of an initiator,

0.5 to 5 parts of a silane coupling agent,

0.1 to 3 portions of defoaming agent,

0.3-3 parts of drier.

In some preferred embodiments, the isocyanate acrylate modified alkyd resin is prepared from the following raw materials in percentage by weight: 15-17 wt% of vegetable oleic acid, 9-11 wt% of monopentaerythritol, 3-5 wt% of trihydric alcohol, 12-14 wt% of phthalic anhydride, 8-10 wt% of benzoic acid, 0.05-0.15 wt% of color reducing agent, 4-10 wt% of isocyanate acrylate, 0.03-0.05 wt% of dibutyltin dilaurate and the balance of propylene monomers to 100 wt%.

The preparation method of the isocyanate acrylate modified alkyd resin refers to the following steps:

(1) putting 15-17 wt% of vegetable oleic acid, 9-11 wt% of monopentaerythritol, 3-5 wt% of trihydric alcohol, 12-14 wt% of phthalic anhydride, 8-10 wt% of benzoic acid and 0.05-0.15 wt% of color reducing agent into a reaction kettle, heating to 180-190 ℃, preserving heat for 3-5 hours, then heating to 220 ℃ for 2-3 hours, and heating, refluxing and esterifying at 220-230 ℃;

(2) heating and refluxing, after esterification reaction is carried out for 1-3 hours, sampling and measuring the acid value, cooling when the acid value is less than or equal to 10mgKOH/g, and adding propylene monomers when the temperature is reduced to 80 ℃;

(4) when the temperature of the autoclave is reduced to 60-70 ℃, adding 4-10 wt% of isocyanate acrylate, preserving heat for 1-3 hours at 70-80 ℃, adding 0.03-0.05 wt% of dibutyltin dilaurate, then heating to 80-90 ℃, preserving heat for 1-3 hours, detecting a reaction end point by using infrared spectroscopy, and detecting that NCO (NCO group absorption peak is 2226 cm) cannot be detected^-1) When the reaction is completed, the reaction is terminated. Cooling to below 40 deg.C to obtain isocyanate acrylateA alkyd resin.

In some preferred embodiments, the vegetable oil is selected from the group consisting of dry and/or semi-dry vegetable oleic acid.

In some preferred embodiments, the drying and semi-drying vegetable oil acids are selected from at least one of soybean oil fatty acids, linseed oil fatty acids, sunflower oil acids, rapeseed oil acids, cotton oil fatty acids.

In some preferred embodiments, the drying vegetable oil is selected from the group consisting of linseed oil fatty acids.

Fatty acid of flax oil

The linseed oil fatty acid has an acid value of 195-205 mgKOH/g and is purchased from inner Mongolia Weiyu Biotechnology GmbH.

In some preferred embodiments, the triol is selected from at least one of glycerol, trimethylolpropane, trimethylolethane.

In some preferred embodiments, the triol is selected from trimethylolpropane.

Trimethylolpropane

Trimethylolpropane (TMP for short), white flaky crystal. Is easily soluble in water, lower alcohol, glycerol, N-dimethylformamide, partially soluble in acetone and ethyl acetate, and slightly soluble in carbon tetrachloride, diethyl ether and chloroform. The modified polyvinyl chloride resin is mainly used in the fields of alkyd resin, polyurethane, unsaturated resin, polyester resin, paint and the like, can be used for synthesizing aviation lubricating oil, printing ink and the like, and can also be used as a textile auxiliary agent and a heat stabilizer of polyvinyl chloride resin.

In some preferred embodiments, the color-reducing agent is selected from P-66, available from Yixing, Star pharmaceutical chemical Co.

It should be noted that the color reducing agent in the present application is selected from, but not limited to, the color reducing agent P-66, and all that is required for this function is within the scope of the choice in the present application.

In some preferred embodiments, the isocyanate acrylate is selected from isocyanate ethyl acrylate and/or isocyanatoethyl methacrylate.

Preferably, the isocyanate acrylate is selected from isocyanate ethyl acrylate.

Isocyanate Ethyl acrylate

Isocyanate ethyl acrylate, CAS number 13641-96-8.

In some preferred embodiments, the acrylate resin is selected from at least one of a urethane acrylate resin, an epoxy acrylate resin, and a polyester acrylate resin.

Preferably, the acrylate resin is selected from urethane acrylate resins.

Acrylic resin and isocyanate acrylic acid modified alkyd resin combined action are selected in the application, on the one hand, an acrylate chain segment grafted on an isocyanate acrylic acid modified alkyd resin chain is added in the curing process, the problem that the curing speed of UV (ultraviolet) curing acrylic resin used alone is slow is solved, and on the other hand, the production cost of the three-proofing paint is reduced. However, the applicant unexpectedly finds that the salt spray resistance of the three-proofing paint obtained by the formula is greatly improved, and supposes that: the C-C double bond in the acrylic resin can generate a crosslinking effect with isocyanate acrylic acid modified alkyd resin in a system to form a network structure, and the intermolecular interaction force between the network structures can form a compact barrier to prevent substances in the external environment from corroding the circuit board, so that the salt spray resistance of the three-proofing paint is improved.

However, the applicant has found that the shrinkage of the paint layer formed by this arrangement is correspondingly reduced.

In some preferred embodiments, the propylene monomer is selected from one or more of isobornyl acrylate, ethoxyethoxyethyl acrylate, and acryloyl morpholine.

Preferably, the propylene monomer is selected from isobornyl acrylate and ethoxyethoxyethyl acrylate.

Preferably, the weight ratio of isobornyl acrylate to ethoxyethoxyethyl acrylate is 1: 0.5-1.

In order to solve the problem of shrinkage reduction caused by acrylic resin and isocyanate acrylic modified alkyd resin, the acrylic resin is obtained through a large number of creative experiments, and when the isocyanate acrylic modified alkyd resin is prepared, the acrylic monomer is isobornyl acrylate and ethoxy ethyl acrylate, so that the problem of shrinkage reduction of a paint layer can be solved. However, applicants have unexpectedly found that in the isocyanate acrylic-modified alkyd resin prepared, the weight ratio of isobornyl acrylate to ethoxyethoxyethoxyethyl acrylate is selected to be 1: when the adhesive force is 0.5-1, the three-proofing paint with good adhesive force can be obtained. The applicant speculates that possible reasons are: isobornyl acrylate and ethoxy ethyl acrylate are used as monomers, strong steric hindrance protection can be formed between polymers due to the bicycloalkyl group in isobornyl acrylate, the formed nonpolar side group on a polymer chain can weaken the interaction between molecules, the thickness of a hydration layer formed by a solution is reduced, and therefore the tri-proof paint is better compatible with the ethoxy ethyl acrylate, the coating effect of the tri-proof paint is improved, the defects of orange peel and pinholes in the coating process are reduced, and the adhesion capacity of the paint layer on a circuit board is improved. Meanwhile, the stability of the three-proofing paint in a viscosity change test is also ensured, the three-proofing paint is placed in a sealed and light-proof manner for 6 months under the conditions that the temperature is 23 ℃ and the humidity is 25%, and the viscosity change is within 20%.

In some preferred embodiments, the oxime-based compound is selected from at least one of methyl ethyl ketoxime, cyclohexanone oxime, butyraldehyde oxime.

In some preferred embodiments, the drier is selected from at least one of cobalt isooctanoate, manganese isooctanoate, calcium isooctanoate, zinc isooctanoate, rare earth isooctanoate.

Preferably, the drier is selected from cobalt isooctanoate, calcium isooctanoate and rare earth isooctanoate.

Preferably, the weight ratio of the cobalt isooctanoate, the calcium isooctanoate and the rare earth isooctanoate is 1-2.5: 1: 0.5-1.5.

The applicant finds that the cobalt isooctanoate selected in the application can generate chemical complexation with methyl ethyl ketoxime, cyclohexanone oxime and butyraldehyde oxime in a system, so that the cobalt isooctanoate temporarily loses the drying action. However, when the weight ratio of the cobalt isooctanoate, the calcium isooctanoate and the rare earth isooctanoate is 1-2.5: 1: 0.5-1.5 of the compatibility to form a drier, the paint coating defect prevention and paint coating drying effects can be simultaneously generated on the surface of the paint coating, wherein one part of cobalt iso-octoate is used for generating the effect with an oxime group compound, and the other part of cobalt iso-octoate is used for generating the synergistic effect with calcium iso-octoate and rare earth iso-octoate, so that the damage of hydrogenated and oxidized bonds formed by oxygen absorption of the paint coating can be effectively accelerated, a stable chemical bond is formed, the quick oxidation of the paint coating is promoted, and the stability of the paint coating is also ensured. The applicant unexpectedly found that the weight ratio of cobalt isooctanoate, calcium isooctanoate and rare earth isooctanoate is 1-2.5: 1: the high and low temperature resistance of the three-proofing paint prepared at 0.5-1.5 is improved. However, when this option is chosen, the dispersibility of the siccative in the system is an important issue to be solved.

In some preferred embodiments, the silane coupling agent is selected from at least one of 3-methacryloxypropylmethyldimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, methacryloxypropyltriisopropoxysilane, vinyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, vinyltriacetoxysilane.

In some preferred embodiments, the silane coupling agent is selected from the group consisting of gamma-methacryloxypropyltrimethoxysilane, vinyltrimethoxysilane.

In some preferred embodiments, the weight ratio of gamma-methacryloxypropyltrimethoxysilane to vinyltrimethoxysilane is from 2 to 5: 1.

a great deal of experiments show that the gamma-methacryloxypropyltrimethoxysilane and the vinyl trimethoxysilane are selected based on the UV and oxidation curing system selected from the system, so that the dispersibility among all the substances can be improved, and the micro-crosslinking effect among reactants can be improved. However, the applicant has found that gamma-methacryloxypropyltrimethoxysilane and vinyltrimethoxysilane are present in a weight ratio of 2-5: 1, the silane coupling agent can promote the drier to ensure that the surface energy of the paint layer is reduced on the surface of the formed paint layer. The composite material is used on the surface of a circuit board, so that the infiltration of organic solvents, water vapor impurities in the air and the like can be reduced, and the use safety of the circuit board is improved.

Meanwhile, the three-proofing paint prepared by the synergistic effect of the silane coupling agent, the drier, the oximino compound and the isocyanate acrylate modified alkyd resin has better flame retardant performance, and shows a 94-V0 result in a flammability UL94 grade test.

In some preferred embodiments, the initiator is selected from photoinitiators.

In some preferred embodiments, the photoinitiator is selected from at least one of (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 1-hydroxycyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, methyl benzoylformate.

In some preferred embodiments, the photoinitiator is selected from (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide.

(2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, CAS number 75980-60-8.

The fluorescent indicator described in this application, trade name FA-207LF, product name: japanese phosphor was obtained from Bofeng chemical Co., Ltd, Dongguan.

The defoaming agent described herein is selected from BYK-A535.

Further, the defoaming agent used in this application is selected from BYK-A535 but not limited to BYK-A535, and BYK model defoaming agent of Bikk Germany can be selected.

The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.

In addition, the starting materials used are all commercially available, unless otherwise specified.

Examples

Example 1

The flame-retardant UV oxidation dual-curing three-proofing paint comprises the following preparation raw materials in parts by weight:

50 parts of isocyanate acrylate modified alkyd resin,

10 parts of an acrylic resin, and (C),

0.9 part of an oximino compound,

0.05 part of a fluorescent indicator,

3.5 parts of (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide,

4 parts of a silane coupling agent, namely,

0.5 part of a defoaming agent,

1.4 parts of drier.

The acrylic resin is selected from polyurethane acrylic resin.

The oxime compound is cyclohexanone oxime.

The silane coupling agent is selected from gamma-methacryloxypropyltrimethoxysilane and vinyl trimethoxysilane, and the weight ratio is 3: 1.

the drier is selected from cobalt isooctanoate, calcium isooctanoate and rare earth isooctanoate, and the weight ratio is 2: 1: 0.5.

the isocyanate acrylate modified alkyd resin comprises the following raw materials in percentage by weight: 15 wt% of linseed oil fatty acid, 10 wt% of monopentaerythritol, 4 wt% of trimethylolpropane, 12 wt% of phthalic anhydride, 10 wt% of benzoic acid, 0.05 wt% of color reducing agent, 8 wt% of isocyanate ethyl acrylate, 0.03 wt% of dibutyltin dilaurate and the balance of propylene monomer to 100 wt%.

Polyurethane acrylic, model CN8004, available from sandoma corporation, usa; the color reducing agent is P-66, which is purchased from Xingxing Xingyi pharmaceutical chemical industry Co., Ltd; linseed oil fatty acid with an acid value of 195-205 mgKOH/g, which is purchased from inner Mongolia Weiyu Biotechnology GmbH; 2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, CAS No. 75980-60-8; defoamer, model BYK-a535, purchased from BYK chemical reagent net, germany; fluorescent indicator, designation FA-207LF, product name: japanese phosphor was obtained from Bofeng chemical Co., Ltd, Dongguan.

(1) adding linseed fatty acid, monopentaerythritol, trimethylolpropane, phthalic anhydride, benzoic acid and a color reducing agent into a reaction kettle, heating to 180 ℃, keeping the temperature for 4 hours, then heating to 220 ℃ for 2 hours, and heating, refluxing and esterifying at 220 ℃;

(2) heating and refluxing, after esterification reaction for 2 hours, sampling and measuring the acid value, when the acid value is less than or equal to 10mgKOH/g, cooling, and when the temperature is reduced to 80 ℃, adding propylene monomer;

(4) when the temperature of the kettle is reduced to 60 ℃, adding isocyanate ethyl acrylate, keeping the temperature at 60 ℃ for 3 hours, adding dibutyltin dilaurate, then heating to 80 ℃, keeping the temperature for 2 hours, detecting the reaction end point by using infrared spectroscopy, and detecting NCO (the absorption peak of NCO group is 2226 cm)^-1) When the reaction is completed, the reaction is terminated. And cooling to 30 ℃ to obtain the isocyanate acrylate modified alkyd resin.

The propylene monomer in the step (2) is selected from isobornyl acrylate and ethoxy ethyl acrylate, and the weight ratio is 1: 1.

a preparation method of flame-retardant UV oxidation dual-curing three-proofing paint comprises the following steps:

adding isocyanate acrylate modified alkyd resin, acrylate, (2,4, 6-trimethylbenzoyl chloride) diphenyl phosphine oxide, an oximino compound, a silane coupling agent, a defoaming agent and a fluorescent indicator into a reaction kettle in sequence, and stirring uniformly to obtain the product.

Comparative example 1

A flame retardant UV oxidation dual cure tri-proof paint, differing from example 1 in that the drier is selected from cobalt iso-octoate.

Comparative example 2

A UV-curable three-proofing paint is different from the paint in example 1 in that isocyanate group-containing polyurethane acrylic resin (model PRO 31073, available from Saedoma, USA) is replaced by isocyanate acrylate modified alkyd resin and drier.

Comparative example 3

A flame-retardant UV oxidation dual-curing three-proofing paint, which does not contain a drier, unlike example 1.

And (3) performance testing:

the three-proofing paints prepared in the example 1 and the comparative examples 1 to 3 are subjected to performance measurement, samples are sprayed and prepared by a selective automatic spraying machine, the thickness of a dry film is 100 mu m, and the thickness of the dry film is 5J/cm under a 365nm LED lamp²After UV curing under the conditions, the test pieces were left at room temperature for 7 days, and then the performance test was started, and the specific test data are shown in Table 1.

(1) Salt spray resistance test

Continuously spraying 5% NaCl solution on the PCB for 168h, and observing whether the surface of the PCB is whitish, foamed and peeled. The test PASS was considered to be NO if NO blush, blistering and shedding were specified.

(2) High and low temperature testing

Treating the PCB for 1h at-40 ℃ in a constant temperature and humidity chamber, then treating for 1h at 80 ℃, wherein the treatment process is used as a cycle, and after 36 cycles, observing whether the surface of the PCB is whitened, foamed and peeled. The test PASS was considered to be NO if NO blush, blistering and shedding were specified.

(3) Double 85 test

Placing the PCB in a constant temperature and humidity box at 85 ℃ and 85% humidity for 144h, and observing whether the surface of the PCB is whitish, foamed and peeled. The test PASS was considered to be NO if NO blush, blistering and shedding were specified.

(4) Adhesion test

Tested according to GB/T9286-1998.

(5) Flame retardancy test

Tested according to flammability UL94 rating.

(6) Viscosity Change test

The viscosity test is carried out after the mixture is sealed and protected from light for 6 months under the conditions that the temperature is 23 ℃ and the humidity is 25 percent. The viscosity change is specified to be within 20%, the test PASS is considered, otherwise it is NO.

(7) Determination of paint film surface

And judging according to the condition of the three-proofing paint film after coating, and counting the judgment result in the following table.

In the experimental process, the surface of the paint film is not dried after the three-proofing paint prepared in the comparative example 3 is coated.

Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The flame-retardant UV oxidation dual-curing three-proofing paint is characterized by comprising the following preparation raw materials in parts by weight:

30-60 parts of isocyanate acrylate modified alkyd resin,

0 to 20 parts of an acrylic resin,

0.1 to 1.8 parts of an oximino compound,

0.01 to 0.5 parts of a fluorescent indicator,

0.5 to 8 parts of an initiator,

0.5 to 5 parts of a silane coupling agent,

0.1 to 3 portions of defoaming agent,

0.3-3 parts of drier.

2. The flame-retardant UV-oxidation dual-curing three-proofing paint according to claim 1, wherein the isocyanate acrylate modified alkyd resin is prepared from the following raw materials in percentage by weight: 15-17 wt% of vegetable oleic acid, 9-11 wt% of monopentaerythritol, 3-5 wt% of trihydric alcohol, 12-14 wt% of phthalic anhydride, 8-10 wt% of benzoic acid, 0.05-0.15 wt% of color reducing agent, 4-10 wt% of isocyanate acrylate, 0.03-0.05 wt% of dibutyltin dilaurate and the balance of propylene monomers to 100 wt%.

3. The flame-retardant UV-oxidation dual-curing conformal coating of claim 2, wherein the isocyanate acrylate is selected from isocyanate ethyl acrylate and/or isocyano ethyl methacrylate.

4. The flame-retardant UV oxidation dual-curing conformal coating of claim 2, wherein the propylene monomer is selected from one or more of isobornyl acrylate, ethoxyethoxyethyl acrylate and acryloyl morpholine.

6. The flame-retardant UV-oxidation dual-curing conformal coating according to claim 1, wherein the acrylate resin is at least one selected from a group consisting of a urethane acrylate resin, an epoxy acrylate resin and a polyester acrylate resin.

7. The flame-retardant UV oxidation dual-curing conformal coating according to claim 1, wherein the oxime-based compound is at least one selected from methyl ethyl ketoxime, cyclohexanone oxime and butyraldehyde oxime.

8. The flame retardant UV oxidation dual-cure tri-proof paint according to claim 1, wherein the drier is selected from at least one of cobalt iso-octoate, manganese iso-octoate, calcium iso-octoate, zinc iso-octoate, and rare earth iso-octoate.

9. The flame-retardant UV oxidation dual-curing tri-proof paint according to claim 1, wherein the silane coupling agent is at least one selected from the group consisting of 3-methacryloxypropylmethyldimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, methacryloxypropyltriisopropoxysilane, vinyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, and vinyltriacetoxysilane.

10. The preparation method of the flame-retardant UV oxidation dual-curing tri-proof paint according to any one of claims 1 to 9, characterized by comprising the following steps: