Flame-retardant uv coating and method for producing the same

Abstract

The application discloses a kind of fire-retardant UV coating and preparation method thereof, the fire-retardant UV coating includes: 30~70% of UV prepolymer resin by mass percentage, 5~40% of active diluent by mass percentage, 1~10% of high acid value adhesion promoter by mass percentage, 2~8% of photoinitiator by mass percentage, 0~20% of filler by mass percentage, 5~30% of fire retardant by mass percentage, 0.1~5% of wetting dispersant by mass percentage, 0.1~2% of antifoam by mass percentage, 0.1~2% of leveling agent by mass percentage, 0~10% of matting powder by mass percentage and 0.1~2% of anti-settling agent by mass percentage;The acid value of the high acid value adhesion promoter is ≥100mgKOH / g;The fire retardant is halogen-free fire retardant.The beneficial effects of the application are that the fire-retardant UV coating and preparation method thereof can improve the fire-retardant performance and stability of the coating, and improve the adhesion of the paint film.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical materials, and relates to a UV coating, in particular to a flame-retardant UV coating and a preparation method thereof. BACKGROUND

[0002] As one of important types of coating subfields, the UV coating has been widely applied in many fields at present due to the advantages such as environmental protection, rapid curing and drying, high production efficiency, and good physical properties of the paint film after curing.

[0003] As a synthetic ground decoration material, the PVC floor has been applied in the fields of residential home decoration and commercial decoration for many years due to the characteristics of realistic decoration effect, rich product types and simple paving process, but the market application expansion has entered a bottleneck period, and the reason is that the main resin component of the floor is PVC resin, the halogen content in the molecular chain is high, the product environmental protection is poor, and the product recycling is difficult, so in recent years, manufacturers have developed alternative environmentally friendly floor products such as PP floor and PET floor.

[0004] As a ground decoration material, the flame-retardant performance directly affects the safety of actual use of the product, and the traditional PVC floor has excellent flame-retardant performance due to the halogen structure, but the flame-retardant performance of the floor product prepared from the conventional carbon-hydrogen-oxygen polymer resin such as PP and PET is weak, and the risk of life and property loss caused by fire will be significantly increased, so the flame-retardant modification of the environmentally friendly floor with weak flame-retardant performance is particularly important.

[0005] The UV coating is an important component of the floor material surface layer, and the function thereof can not only realize the surface decoration of the floor, but also significantly improve the protection of the floor surface layer and the resistance of the floor to external environment such as acid and alkali corrosion, scratching, scratching, staining and burning.

[0006] The UV coating applied to the substrate such as PP and PET often needs to add a high-acid-value adhesion promoter monomer or adhesion promoter resin to improve the adhesion and bonding performance of the coating to the floor substrate, so as to better realize the firm adhesion of the coating to the floor substrate and play the performance of the coating.

[0007] Therefore, it is urgent to design a new UV coating to overcome at least part of the above-mentioned defects of the existing UV coating. SUMMARY

[0008] The application provides a fire-retardant UV coating and a preparation method thereof, which can improve the fire-retardant property of the coating and the adhesion of the paint film.

[0009] To solve the above technical problems, according to one aspect of the application, the following technical solution is adopted:

[0010] The fire-retardant UV coating comprises 30-70% of UV prepolymer resin, 5-40% of active diluent, 1-10% of high-acid-value adhesion promoter, 2-8% of photoinitiator, 0-20% of filler, 5-30% of fire retardant, 0.1-5% of wetting dispersant, 0.1-2% of defoaming agent, 0.1-2% of leveling agent, 0-10% of matting powder and 0.1-2% of anti-settling agent.

[0011] The high-acid-value adhesion promoter has an acid value of ≥100 mgKOH / g; and the fire retardant comprises a combination of one or more products of coated modified halogen-free fire retardant or microcapsule type halogen-free fire retardant.

[0012] As an embodiment of the application, the high-acid-value adhesion promoter is a high-acid-value monomer or oligomer, and the acid value is >100 mgKOH / g.

[0013] As an embodiment of the application, the high-acid-value adhesion promoter comprises at least one of hydroxyethyl methacrylate phosphate (HEMAP, acid value 270-310 mgKOH / g), methacrylate phosphate (acid value 270 mgKOH / g), Zannan Additol XL 180 phosphate adhesion promoter (acid value 260-340 mgKOH / g), Guangzhou Lijun modified methacrylic acid phosphate PM-2 (acid value 270 mgKOH / g) and Solvay SIPOMER PAM-200 phosphate functional monomer (acid value 131.5 mgKOH / g).

[0014] As an embodiment of the application, the fire retardant comprises melamine-coated modified ammonium polyphosphate, melamine-coated modified aluminum hydroxide, melamine-coated modified magnesium hydroxide, melamine microcapsulated ammonium polyphosphate-pentaerythritol-melamine, and a combination of one or more of the above fire retardants; the average particle size of the fire retardant is less than 15 μm, and the oil absorption value is less than 150 g / 100 g.

[0015] As an embodiment of the present application, the photoinitiator includes one or a combination of 2,4,6 (trimethylbenzoyl) diphenyl phosphine oxide, 2,4,6-trimethylbenzoyl ethyl phosphinate, 2-methyl-1-[4-methylthiophenyl]-2-morpholinyl-1-propanone, 2-isopropylthioxanthone, 4-dimethylamino-benzoic acid ethyl ester, 1-hydroxy-cyclohexyl-phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin dimethyl ether, methyl o-benzoylbenzoate, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone, 2,4-diethylthioxanthone, benzophenone, 2-hydroxy-1-[4-[4-(2-hydroxy-2-methylpropionyl)phenoxy]phenyl]-2-methylpropanone.

[0016] As an embodiment of the present application, the wetting dispersant, defoaming agent, leveling agent, and anti-settling agent are a combination of one or more products having the functional effects.

[0017] As an embodiment of the present application, the composition of each raw material of the coating formula does not contain halogen.

[0018] According to an aspect of the present application, the following technical solution is adopted: a preparation method of the above-mentioned flame-retardant UV coating, the preparation method comprising:

[0019] The UV prepolymer resin with a mass percentage of 30-70%, the active diluent with a mass percentage of 5-40%, the high-acid-value adhesion promoter with a mass percentage of 1-10%, the photoinitiator with a mass percentage of 2-8%, and the wetting dispersant with a mass percentage of 0.1-5%, the defoaming agent with a mass percentage of 0.1-2%, and the leveling agent with a mass percentage of 0.1-2% are sequentially added into the stirring cylinder, the stirrer is turned on at a speed of 500-600 rpm, and the mixture is stirred for 5-30 min;

[0020] The wetting dispersant with a mass percentage of 0.1-5%, the defoaming agent with a mass percentage of 0.1-2%, and the leveling agent with a mass percentage of 0.1-2% are sequentially added into the stirring cylinder, and the mixture is dispersed at a speed of 1000-1200 rpm for 5-30 min;

[0021] The matting powder with a mass percentage of 0-10%, the filler with a mass percentage of 0-20%, and the flame retardant with a mass percentage of 5-30% are sequentially added into the dispersion container, and the mixture is dispersed at a speed of 1200-1500 rpm for 10-120 min; the speed is reduced to 800-1000 rpm, the anti-settling agent with a mass percentage of 0.1-2% is added, and the mixture is continuously stirred and mixed for 10-60 min, to obtain the above-mentioned flame-retardant UV coating.

[0022] The beneficial effects of the present application are that the flame-retardant UV coating and the preparation method thereof can improve the flame-retardant performance and stability of the coating and enhance the adhesion of the paint film. The present application can meet the stability of halogen-free flame retardant in a high-acid-value coating system, and solve the balance problem of the adhesion and the stability of the flame-retardant performance of the current halogen-free flame-retardant coating for PP and PET floor.

[0023] In one use scenario of the present application, the present application solves the halogen-free flame-retardant demand of UV coating for environmentally friendly floor such as PP floor and PET floor by compounding a special modified halogen-free flame retardant in a high-acid-value UV coating formula, and comprehensively realizes a UV coating product with stable flame-retardant performance and excellent paint film adhesion.

[0024] The flame-retardant UV coating of the present application solves the balance problem of the adhesion and the stability of the flame-retardant performance of the current PP and PET floor, and through the coating modification or microencapsulation modification of the halogen-free flame retardant, the stability of the halogen-free flame retardant in the high-acid-value coating system can be significantly improved, and the problems of flame retardant failure or flame-retardant performance decline with the prolongation of the storage time of the coating will not occur. In addition, through the coating modification or microencapsulation modification, the compatibility stability and dispersibility of the flame retardant in the coating can be realized, and the flame-retardant efficiency of the flame retardant is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The flowchart of the preparation method of the flame-retardant UV coating in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] In order to further understand the present application, the preferred embodiments of the present application will be described below in conjunction with the embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, and are not limitations on the claims of the present application.

[0028] The description in this part is only for a few typical embodiments, and the present application is not limited to the scope described in the embodiments. The same or similar prior art means and some technical features in the embodiments can be replaced with each other, which is within the description and protection scope of the present application.

[0029] The description of the steps in each embodiment in the specification is only for convenience, and the implementation mode of the present application is not limited by the order of the steps.

[0030] The application discloses a fire-retardant UV coating, which comprises 30-70% of UV prepolymer resin by mass percentage, 5-40% of active diluent by mass percentage, 1-10% of high-acid-value adhesion promoter by mass percentage, 2-8% of photoinitiator by mass percentage, 0-20% of filler by mass percentage, 5-30% of fire retardant by mass percentage, 0.1-5% of wetting dispersant by mass percentage, 0.1-2% of defoaming agent by mass percentage, 0.1-2% of leveling agent by mass percentage, 0-10% of matting powder by mass percentage and 0.1-2% of anti-settling agent by mass percentage.

[0031] In an embodiment of the application, the high-acid-value adhesion promoter is a high-acid-value monomer or oligomer, with an acid value >100 mg KOH / g.

[0032] In an embodiment of the application, the high-acid-value adhesion promoter comprises at least one of hydroxyethyl methacrylate phosphate (HEMAP, acid value 270-310 mg KOH / g), methacrylate phosphate (acid value 270 mg KOH / g), Zannan Add itol XL 180 phosphate adhesion promoter (acid value 260-340 mg KOH / g), Guangzhou Likun modified methacrylic acid phosphate PM-2 (acid value 270 mg KOH / g) and Solvay SIPOMER PAM-200 phosphate functional monomer (acid value 131.5 mg KOH / g).

[0033] In an embodiment of the application, the fire retardant comprises melamine-coated modified ammonium polyphosphate, melamine-coated modified aluminum hydroxide, melamine-coated modified magnesium hydroxide, melamine microencapsulated ammonium polyphosphate-pentaerythritol-melamine, or a combination of one or more of the above fire retardants; the average particle size of the fire retardant is less than 15 μm, and the oil absorption value is less than 150 g / 100 g.

[0034] In an embodiment of the present application, the photoinitiator comprises one or a combination of 2,4,6 (trimethylbenzoyl) diphenyl phosphine oxide, 2,4,6-trimethylbenzoyl phosphinic acid ethyl ester, 2-methyl-1-[4-methylthiophenyl]-2-morpholinyl-1-propanone, 2-isopropylthioxanthone, 4-dimethylamino-benzoic acid ethyl ester, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin dimethyl ether, methyl o-benzoylbenzoate, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone, 2,4-diethylthioxanthone, benzophenone, 2-hydroxy-1-[4-[4-(2-hydroxy-2-methylpropionyl)phenoxy]phenyl]-2-methylpropanone; the photoinitiator can have a low odor or odorless effect.

[0035] In an embodiment of the present application, the wetting dispersant, defoaming agent, leveling agent, and anti-settling agent are a combination of one or more products with such functional effects. In an embodiment, the wetting dispersant also has good viscosity-reducing effect; the defoaming agent and leveling agent do not affect the recoatability.

[0036] In an embodiment of the present application, the raw materials of the coating formula do not contain halogen.

[0037] The present application further discloses a preparation method of the above-mentioned flame-retardant UV coating, Figure 1 The present application further discloses a preparation method of the above-mentioned flame-retardant UV coating, Figure 1 The present application further discloses a preparation method of the above-mentioned flame-retardant UV coating,

[0038]

Step S1

[0039]

Step S2

[0040]

Step S3

[0041] In an embodiment of the present application, the preparation method comprises: putting the UV prepolymer resin, active diluent, high-acid-value adhesion promoter, and photoinitiator into the stirring cylinder according to the metering fraction, starting the stirrer at a speed of 500-600 rpm, mixing for 15 min, then putting the wetting dispersant, defoaming agent, and leveling agent into the dispersion cylinder in turn at a speed of 1000-1200 rpm for 15 min, then putting the matting powder, filler, and flame retardant into the dispersion cylinder in turn at a speed of 1200-1500 rpm for 60 min, reducing the speed to 800-1000 rpm, adding the anti-settling agent, and continuing to mix for 30 min, to obtain the flame-retardant UV coating of the present application.

[0042] The preparation process of the UV matte coating is carried out according to the above-mentioned implementation steps, and the material matching ratio of each component is shown in Table 1.

[0043] Table 1: Material matching ratio of the formulation implementation

[0044]

[0045]

[0046] The application performance of the above-mentioned embodiments is shown in Table 2.

[0047] Table 2: Comparison of performance test results of the formulation implementation

[0048]

[0049]

[0050] Note: Test process description:

[0051] a: Viscosity test: 25℃ / 3# rotor / 60 rpm;

[0052] b: Acid value test according to GBT 6743 2008;

[0053] c. Adhesion test according to GBT 9286-2021, 0 level is the best, and 5 level is the worst;

[0054] d: Flame-retardant CHF test according to GBT 11785 2005;

[0055] e: Scratch resistance test according to ISO 1518, needle 0.5 mm;

[0056] f: Hot storage test at 50°C / week;

[0057] g: Test film thickness 20 pm;

[0058] h. Test substrate PP floor.

[0059] In summary, the flame-retardant UV coating and the preparation method thereof can improve the flame-retardant performance and stability of the coating and enhance the adhesion of the paint film. The present application can meet the stability of halogen-free flame retardant in high-acid-value coating system, and solve the balance problem of the adhesion and the stability of the flame-retardant performance of the current halogen-free flame-retardant coating for PP and PET floor.

[0060] In one use scenario of the present application, the present application solves the halogen-free flame-retardant demand of UV coating for environmentally friendly floor such as PP floor and PET floor by compounding special modified halogen-free flame retardant in high-acid-value UV coating formula, and comprehensively realizes the UV coating product with stable flame-retardant performance and excellent paint film adhesion.

[0061] The flame-retardant UV coating solves the balance problem of the adhesion and the stability of the flame-retardant performance of the current PP and PET floor, and can significantly improve the stability of the halogen-free flame retardant in the high-acid-value coating system through the coating modification or microencapsulation modification of the halogen-free flame retardant, so that the problem of flame retardant failure or flame-retardant performance decline does not occur with the prolongation of the storage time of the coating. In addition, the coating modification or microencapsulation modification can realize the compatibility stability and dispersibility of the flame retardant in the coating, and further improve the flame-retardant efficiency of the flame retardant.

[0062] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0063] The description and application of the present application herein are illustrative, and are not intended to limit the scope of the present application to the above-described embodiments. The effects or advantages involved in the embodiments can be interfered by various factors and can not be embodied in the embodiments, and the description of the effects or advantages is not used to limit the embodiments. Variations and changes of the disclosed embodiments are possible, and various components of the embodiments are known to those skilled in the art. It should be clear to those skilled in the art that the present application can be realized in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential characteristics of the present application. Other variations and changes of the disclosed embodiments can be made without departing from the scope and spirit of the present application.

Claims

1. A flame-retardant UV coating, characterized in that, The flame-retardant UV coating comprises: 30-70% of UV prepolymer resin, 5-40% of active diluent, 1-10% of high-acid-value adhesion promoter, 2-8% of photoinitiator, 0-20% of filler, 5-30% of flame retardant, 0.1-5% of wetting dispersant, 0.1-2% of defoaming agent, 0.1-2% of leveling agent, 0-10% of matting powder, and 0.1-2% of anti-settling agent; The acid value of the high-acid-value adhesion promoter is greater than or equal to 100 mgKOH / g; the flame retardant comprises a combination of one or more products of coated modified halogen-free flame retardant or microcapsule type halogen-free flame retardant; The high-acid-value adhesion promoter comprises at least one of hydroxyethyl methacrylate phosphate, methacrylate phosphate, and modified methacrylic acid phosphate PM-2; The flame retardant comprises a combination of one or more of melamine-coated modified ammonium polyphosphate, melamine-coated modified aluminum hydroxide, melamine-coated modified magnesium hydroxide, and melamine microcapsulated ammonium polyphosphate-pentaerythritol-melamine; the average particle size of the flame retardant is less than 15 μm, and the oil absorption value is less than 150 g / 100 g; The photoinitiator comprises a combination of one or more of 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, 2,4,6-trimethylbenzoyl ethyl phosphonate, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, 2-isopropylthioxanthone, 4-dimethylamino-benzoic acid ethyl ester, 1-hydroxy-cyclohexyl-phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin dimethyl ether, o-benzoylbenzoic acid methyl ester, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone, 2,4-diethylthioxanthone, benzophenone, and 2-hydroxy-1-[4-[4-(2-hydroxy-2-methylpropanoyl)phenoxy]phenyl]-2-methylpropanone.

2. The flame-retardant UV coating according to claim 1, wherein: The wetting dispersant, defoaming agent, leveling agent, and anti-settling agent are a combination of one or more products having the corresponding functions.

3. The flame-retardant UV coating according to claim 1, wherein: The composition of each raw material of the coating formula does not contain halogen.

4. A process for the preparation of a flame-retardant UV coating according to any one of claims 1 to 3, characterized in that The preparation method comprises: The UV prepolymer resin, active diluent, high-acid-value adhesion promoter, and photoinitiator are put into a stirring cylinder in the proportions of 30-70%, 5-40%, 1-10%, and 2-8% respectively, the stirrer is turned on at a speed of 500-600 rpm, and the mixture is stirred for 5-30 min; The wetting dispersant, defoaming agent, and leveling agent are put in in the proportions of 0.1-5%, 0.1-2%, and 0.1-2% respectively, and dispersed at a speed of 1000-1200 rpm for 5-30 min. The mass percentage of 0-10% of the light extinction powder, the mass percentage of 0-20% of the filler, the mass percentage of 5-30% of the flame retardant are sequentially put into a dispersion container and dispersed at a rotating speed of 1200-1500 rpm for 10-120 min; the rotating speed is reduced to 800-1000 rpm, the mass percentage of 0.1-2% of the anti-settling agent is added, and the stirring and mixing are continuously carried out for 10-60 min, so that the above flame-retardant UV coating is obtained.

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