UV (ultraviolet) excimer skin-touch paint for relief melamine base material and application of UV excimer skin-touch paint

Abstract

The invention discloses a UV (ultraviolet) excimer skin-touch paint for a relief melamine base material and application of the UV excimer skin-touch paint, and relates to the technical field of paints.The UV excimer skin-touch paint comprises the following components in percentage by weight: 15-50% of UV adhesion promoting resin; 5-10% of modified epoxy acrylate resin; 20 to 50% of special modified polyurethane acrylate resin; 5-20% of amino acrylate resin; 1-5% of phosphoric acid modified acrylate resin; 0.1-1% of a surface tension control agent A; 0.1-1% of a surface tension control agent B; 0.1-1% of a defoaming agent; 0.2-2% of an organosilicon hand feeling auxiliary agent; 0.1 to 0.5 percent of organic silicon leveling agent; 2-8% of a photoinitiator C; 0.3-1% of a wetting dispersant; 1-5% of polyethylene wax powder; and 10-30% of a UV active monomer. According to the invention, the relief melamine base material can realize open coating of the excimer skin-touch paint, and the coated paint film has good surface effect, uniform plate surface gloss without floating, no dust and no white exposure of the guide pipe, and good open effect.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, in particular to a UV excimer skin-feel paint for a relief melamine substrate and application thereof. Background Art

[0002] UV coatings are becoming more and more popular due to their advantages such as environmental protection, high efficiency and economy. Their application fields are constantly expanding and they are widely used in industries such as flooring, furniture, electronics, hardware and building materials. With the improvement of people's requirements for UV paint decoration and paint film protection, different curing processes will make the surface effects of the paint film vary greatly, which has led to the increasing diversification of its construction and curing processes. The main curing methods at present are mercury lamp curing, gallium lamp and mercury lamp synergistic curing, LED curing, excimer nitrogen curing, C lamp curing, etc. Excimer skin-feel paint adopts physical extinction and does not require a matting agent. The polymerization and cross-linking reaction under a 172-nanometer light source can provide high surface hardness and coating density, making it more resistant to physical and chemical properties, and the paint film has good fineness and fullness, and the gloss is extremely low. Based on these advantages, the application scenarios of excimer skin-feel paint continue to expand, and the market has a strong demand for its open coating. Nowadays, the market demand for the open effect of the paint film is growing, and "open texture" has become a market development trend. Many manufacturers require the use of UV excimer skin-feel paint on embossed melamine substrates to achieve an open effect.

[0003] Embossed melamine substrate is also called open melamine substrate. With the continuous development of embossing technology, the surface of melamine board can present a concave and convex texture that perfectly matches the wood grain, thus bringing a very realistic embossed touch. However, due to the requirement for texture demoulding, this substrate will contain more release agent, which makes it relatively more difficult for paint to achieve adhesion on this substrate. In addition, the texture of embossed melamine substrate is hard, and paint can neither penetrate it nor explode the duct, which ultimately leads to poor open effect of paint.

[0004] At present, there are several problems with the UV excimer skin-feel paint on the market.

[0005] 1. UV excimer skin-feel paint has poor adhesion on melamine substrates. Melamine substrate is a very difficult substrate to adhere to. Since the embossed melamine substrate requires an excellent opening effect, more release agent needs to be used in the pressing process, otherwise it will affect the release effect of the catheter. Therefore, the embossed melamine substrate contains a higher amount of release agent than the ordinary melamine substrate, making it more difficult for the paint to adhere.

[0006] 2. The opening effect of UV excimer skin-feel paint on the embossed melamine substrate is poor, and the board surface is bloated.

[0007] 3. After UV excimer skin-feel paint is applied and cured on the embossed melamine substrate, the paint film has a flowery phenomenon, and the gloss of the duct is inconsistent with the gloss of the plane. Summary of the invention

[0008] The purpose of the present invention is to provide a UV excimer skin-feel paint for an embossed melamine substrate and its application, aiming to solve the problems encountered in the open coating of the UV excimer skin-feel paint on the embossed melamine substrate; the embossed melamine substrate can realize the open coating of the excimer skin-feel paint, and the paint film after coating has a good surface effect, the board surface is evenly glossy and not mottled, the duct is dust-free and not white, and the open effect is good. At the same time, the UV excimer skin-feel paint of the present invention can solve the problem of adhesion of the topcoat directly coated on the embossed melamine substrate.

[0009] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0010] A UV excimer skin-feel paint for embossed melamine substrate, comprising the following components in percentage by weight:

[0011]

[0012] Preferably, the UV adhesion promoting resin is a polyether type aromatic difunctional polyurethane acrylate resin.

[0013] Preferably, the UV adhesion promoting resin is LT-4031 resin from Guangxin New Materials Technology.

[0014] Preferably, the special modified polyurethane acrylate resin is HP6217 from Haohui New Materials.

[0015] Preferably, the modified epoxy acrylate resin is ZC8801A from Zicai Chemical

[0016] Preferably, the surface tension control agent A is TEGO Wet 270 produced by Evonik Degussa.

[0017] Preferably, the surface tension control agent B is an acetylenic diol surfactant.

[0018] Preferably, the photoinitiator C is ethyl 2,4,6-trimethylbenzoylphenylphosphinate.

[0019] An application of UV excimer skin-feel paint for embossed melamine substrates, comprising any of the above-mentioned UV excimer skin-feel paint for embossed melamine substrates, and further comprising the following steps:

[0020] Step 1, open melamine sheets such as embossed melamine sheets are fed to the production line;

[0021] Step 2, chamfering the melamine board described in step 1;

[0022] Step 3: Dust and clean the surface of the plate treated in step 2;

[0023] Step 4, on the basis of step 3, a single roller is used to apply the UV excimer skin-feel paint;

[0024] Step 5: Continuously and uninterruptedly apply the UV excimer skin-feel paint to the plate after roller coating in step 4 with a laser roller. The combined coating amount of step 4 and step 5 is 12-16g / m 2 ;

[0025] Step 6: Perform infrared leveling on the plate after roller coating in step 5, with the infrared temperature at 40-50°C and the infrared time at 15-30S;

[0026] Step 7, pre-curing the LED microgel on the board processed in step 6;

[0027] Step eight, performing nitrogen protection UV excimer curing on the basis of step seven;

[0028] Step nine, using two gallium lamps and two mercury lamps to perform ultraviolet curing on the board cured in step eight;

[0029] Step 10: Test the board surface effect of step 9 and store it for later use.

[0030] Preferably, the hardness range of the rubber roller of the single roller is 10-15 degrees; the hardness range of the rubber roller of the laser roller is 30-35 degrees.

[0031] The UV excimer skin-feel paint for embossed melamine substrate of the present invention and its application have the following beneficial effects:

[0032] 1. The UV excimer skin-feel paint for the relief melamine substrate of the present invention has good adhesion when directly coated on the relief melamine substrate, and the adhesion is ≤ level 1;

[0033] 2. The UV excimer skin-feel paint of the present invention has a good surface effect when applied to the open coating of the embossed melamine substrate. The paint film has a uniform gloss without blooming, the gloss between the ducts is uniform without blooming, the gloss between the ducts is uniform without blooming, and the gloss between the ducts and the plane is uniform without blooming. There is no difference between the gloss of the duct and the gloss of the plane.

[0034] 3. The UV excimer skin-feel paint of the present invention has good penetration into the embossed melamine substrate, good opening effect, no bloated board surface, and clear and natural texture;

[0035] 4. The present invention can realize open coating of UV excimer skin-feel paint on the embossed melamine substrate, and the paint film surface effect is good. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the product of the present invention is further described in detail below in conjunction with embodiments.

[0037] It should be noted that all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] A UV excimer skin-feel paint for embossed melamine substrate, comprising the following components in percentage by weight:

[0039]

[0040] The UV adhesion promoting resin is a polyether type aromatic difunctional polyurethane acrylate resin. The UV adhesion promoting resin is LT-4031 resin of Guangxin New Materials Technology. The special modified polyurethane acrylate resin is HP6217 of Haohui New Materials. The modified epoxy acrylate resin is ZC8801A of Zicai Chemical. The surface tension control agent A is TEGO Wet 270 of Evonik Degussa. The surface tension control agent B is an acetylene glycol surfactant. The silicone feel aid is a mixture of one or more of BYK354 leveling agent, Lencolo 3002 fast leveling agent, water-based fluff feel liquid F-12, solvent-based coating feel agent DH-4560, and water-based elastic feel agent LY-806; the silicone leveling aid is a mixture of one or more of Digo TEGO 2100 leveling agent, Dow Corning DC-57 water-based silicone leveling agent, and Dow DOWSIL 57UV leveling agent. The photoinitiator C is ethyl 2,4,6-trimethylbenzoylphenyl phosphinate. The wetting and dispersing agent is TEGO-688 wetting and dispersing agent, BYK-2159 wetting and dispersing agent, Walker The wetting dispersant is a mixture of one or more of PZ1108 matte powder wetting dispersant, wetting dispersant 2158 and Lencol 1108 matte powder wetting dispersant. The polyethylene wax powder is a mixture of one or more of Additive HS-516, Clariant polyethylene wax powder 3620, Lubrizol TF1778, 613pe wax powder and 622 polypropylene wax powder. The UV active monomer is one of 2-phenoxyethyl acrylate (PHEA), bisphenol A diacrylate, tripropylene glycol diacrylate (TPGDA), lauric acid acrylate, isobornyl methacrylate (IBOMA), vinyl ether monomer, 1,6-hexanediol diacrylate (HDDA), trimethylolpropane triacrylate (TMPTA), 2-hydroxyethyl methacrylate (HEMA), hydroxypropyl acrylate (HPA) and glycerol acrylate (GMA).

[0041] It should be noted that the viscosity of the UV excimer skin-feel paint in the present invention is 300-500 CPS / 25°C, and the final curing energy of the gallium lamp and mercury lamp during construction is required to be greater than 800 mJ / cm 2 The polyether aromatic difunctional polyurethane acrylate resin used in the formula for UV adhesion promotion resin is specifically LT-4031 resin from Guangxin New Materials Technology, which has the characteristics of fast curing speed, good surface drying, good flexibility, low shrinkage, good adhesion, etc. In addition, the molecular structure of the polyether aromatic difunctional polyurethane acrylate resin contains two functional groups, isocyanate and acrylate, which makes it have good crosslinking and plasticity during the curing process, which helps to reduce stress concentration; the ether bond (-COC-) and ester bond (-COO-) in the molecular structure of the polyether aromatic difunctional polyurethane acrylate resin can adapt to the change of the paint film volume by rotating and sliding, thereby reducing stress concentration. The presence of ether bonds and ester bonds allows the molecular chain segments to move freely during the curing process, thereby alleviating shrinkage stress. In addition, the molecular chain segments of the polyether aromatic difunctional polyurethane acrylate resin can be rearranged and adjusted during the curing process, further reducing stress concentration and improving the stability and durability of the paint film. This resin has low shrinkage stress, which can solve the problem of poor adhesion caused by shrinkage stress during UV curing of the paint film; at the same time, the paint film is soft, which provides a large adjustable space for formula design of paint film flexibility. The best effect is achieved when the usage ratio in the present invention is 32%-45%.

[0042] The modified epoxy acrylate resin is ZC8801A from Zicai Chemical, which has good adhesion and flexibility, and can make the paint film have certain flexibility and material chemical properties without affecting the adhesion of the paint film.

[0043] The special modified polyurethane acrylate resin uses HP6217 from Haohui New Materials. HP62717 is a difunctional polyurethane acrylate resin and also a polycarbonate modified aliphatic polyurethane acrylate resin. It has special high temperature resistance, excellent adhesion and high hardness, and strong scratch resistance. It can well balance the adhesion and scratch resistance of the paint film, and can make the paint film have a certain hardness and excellent scratch resistance, effectively improving the physical and chemical properties of the paint film.

[0044] As shown in Table 1

[0045]

[0046] The texture of the relief melamine substrate is hard and the content of release agent is relatively high, so it is difficult to solve the adhesion between the paint and the substrate. The adhesion of the paint film is in conflict with the hardness and scratch resistance. Because the better the hardness and scratch resistance of the paint film, the greater the shrinkage stress of the paint. The greater the stress, the worse the adhesion of the paint film. In this case, it is necessary to balance the adhesion of the paint film, the cross-linking density, etc. Through experiments, it was found that the special modified polyurethane acrylate resin can both ensure adhesion and provide good scratch resistance.

[0047] The aminoacrylate resin is a resin formed by free radical polymerization of acrylate monomers and other olefin monomers in an organic solvent by an initiator. Its molecular structure contains amino and acrylate groups. This structure enables the resin to form a three-dimensional network structure during the curing process. This structure not only improves the viscosity of the paint, but also enhances its physical properties, such as hardness, wear resistance and chemical corrosion resistance. The amino and acrylate groups in the aminoacrylate resin molecular structure form a large number of chemical bonds during the curing process. These chemical bonds increase the interaction force between molecules, thereby increasing the viscosity of the paint. Under heating or ultraviolet irradiation, the double bonds in the resin undergo cross-linking reactions to form a stable chemical structure. This process not only increases the viscosity of the paint, but also makes it have better physical and chemical properties. Therefore, by controlling the content of the aminoacrylate resin in the present invention, the viscosity of the paint can be adjusted, and the hardness and scratch resistance of the paint can be improved, as well as the surface curing speed and surface curing performance of the paint can be improved.

[0048] The phosphoric acid modified acrylate resin is Haohui HC5110, which is a monofunctional phosphoric acid acrylate resin containing compounds of phosphate groups and acrylate groups. During the curing process of the coating, the phosphate group of the acrylic phosphate can chemically react with the metal surface to form a chemical bond, thereby enhancing the bonding force between the coating and the metal surface, thereby enabling this resin to have good adhesion on the melamine substrate. It is the most important resin for providing adhesion. When used in combination with a UV adhesion-promoting resin, the paint can have good adhesion on the melamine substrate.

[0049] The surface tension control agent A is TEGO Wet 270 of Evonik Degussa, which is a low static surface tension additive that can significantly reduce the real surface tension of the paint, making the surface tension of the paint system lower than the surface tension of the substrate, and can improve the final wettability of the paint to the substrate, so that the paint can finally stably and thoroughly wet all substrates successfully; surface tension control agent B can improve the wettability of the paint to the substrate at the moment of construction, improve the rapid spreading fluidity of the paint to the substrate, significantly improve the pore penetration of the paint, and facilitate the realization of the opening effect; the combination of the two additives can make the paint evenly wet and spread on the substrate conduit and plane. As shown in Table 2

[0050]

[0051] The combination of low static surface tension additives and low dynamic surface tension additives can make the paint quickly and finally wet the substrate, which can overcome the problem that when the low static surface tension additive is used alone, the paint wetting the substrate is not fast enough, and part of the substrate is missed, that is, part of the substrate is not wetted; it can also overcome the problem that when the low dynamic surface tension additive is used alone, the paint surface tension is not low enough, the paint cannot wet the substrate, that is, the paint cannot finally spread and wet on the substrate.

[0052] The organic silicon hand feeling additive is a mixture of one or more of Deqian Levaslip 435 leveling agent, Lencolo 3002 fast leveling agent, water-based fluffy feel liquid F-12, solvent-based paint feel agent DH-4560, and water-based elastic feel agent LY-806; BYK354 leveling agent is an organic silicon leveling agent with the characteristics of scratch resistance and smooth feel; Lencolo 3002 fast leveling agent is an organic silicon baking paint feel agent that can provide a good leveling effect; water-based fluffy feel liquid F-12 is an elastic and smooth feel agent containing organic silicon micron particles; solvent-based paint feel agent DH-4560 is an organic silicon leveling agent used for leather feel agent, and has anti-graffiti and anti-adhesion properties; water-based elastic feel agent LY-806 is a water-based fleshy feel agent with good elasticity and smoothness.

[0053] The organosilicon leveling agent is a mixture of one or more of TEGO 2100 leveling agent, Dow Corning DC-57 organosilicon leveling agent, and Dow DOWSIL 57UV leveling agent. TEGO 2100 leveling agent is a reactive organosilicon leveling agent with good hydrophobic, smooth and anti-cratering effects; Dow Corning DC-57 organosilicon leveling agent and Dow DOWSIL 57UV leveling agent have a smooth effect, are high-quality leveling agents, and have good recoating performance; these organosilicon leveling agents have significant application effects in UV-curing coatings and can improve the leveling, scratch resistance and anti-cratering effects of the coating film.

[0054] The photoinitiator C is ethyl 2,4,6-trimethylbenzoylphenylphosphinate, which plays a role in curing the paint film. As shown in Table 3:

[0055]

[0056]

[0057] The surface of the embossed melamine substrate is uneven, the distance between the plane and the conduit and the lamp is different, the plane is close to the lamp, the conduit is far from the lamp, and during the excimer pre-curing, the same paint receives different curing energies and different pre-curing states, which results in different paint film glosses during excimer curing. The photoinitiator C used in the present invention is 2,4,6-trimethylbenzoylphenyl phosphinate, which is an alkyl ester of a liquid phosphine oxide compound. The oxygen phosphine radical is very sensitive to oxygen. When used alone, the surface curing is very poor, but in the present invention, its disadvantages are turned into advantages, and this initiator is innovatively used alone. The principle of its poor surface curing is utilized to make the paint form a microgel state in a wide energy range. In addition, the ultraviolet wavelength absorbed by this initiator is relatively long, and the absorption wavelength can reach 350-420nm, which is conducive to the curing of the paint in the conduit, so that the pre-curing of the conduit paint and the plane paint can be consistent, and a paint film in a microgel state can be formed, and a paint film with uniform gloss can be obtained during excimer curing. Other conventional photoinitiators cannot pre-cure the paint well in the paint system of the present invention, the paint film formed in the excimer curing stage cannot float well on the paint liquid, and the gloss of the paint film is too high during the final curing by the mercury lamp, so that a matte paint film is not obtained.

[0058] The wetting and dispersing agent is TEGO-688 wetting and dispersing agent, BYK-2159 wetting and dispersing agent, Walker Wetting dispersant, Sago-9860 wetting dispersant, PZ1108 matte powder wetting dispersant, wetting dispersant 2158 and Lencol 1108 matte powder wetting dispersant. The wetting dispersant of TEGO-688 wetting dispersant can stabilize matte powder and have a positive effect on the rheological properties of UV coatings; BYK-2159 wetting dispersant has a good viscosity reduction effect and improves matte properties; Walker The wetting and dispersing agent is based on German technology background. It can disperse and stabilize untreated and treated silica type matting powder, and has a strong viscosity reduction effect and improves matting performance; PZ1108 matting powder wetting and dispersing agent has a good viscosity reduction effect; wetting and dispersing agent 2158 is suitable for wetting and dispersing silica, and has a significant viscosity reduction effect; Lencolo 1108 matting powder wetting and dispersing agent has good wetting and dispersing properties.

[0059] The polyethylene wax powder is mixed with one or more of Additive HS-516, Clariant polyethylene wax powder 3620, Lubrizol TF1778, 613pe wax powder and 622 polypropylene wax powder. Additive HS-516 is a modified polyethylene wax powder with excellent transparency, smoothness and scratch resistance; Clariant polyethylene wax powder 3620 has lubrication and dispersion functions, which can improve the wear resistance, scratch resistance and anti-sticking properties of the coating; Lubrizol TF1778 is a polytetrafluoroethylene modified polyethylene wax powder, which can provide excellent wear resistance and scratch resistance; 613pe wax powder has the characteristics of scratch resistance, wear resistance and high transparency; 622 polypropylene wax powder has the characteristics of hardening, scratch resistance and high hardness; these wax powders perform well in UV-curing coatings and can provide excellent transparency, smoothness and scratch resistance.

[0060] The UV active monomer is one of 2-phenoxyethyl acrylate (PHEA), bisphenol A diacrylate, tripropylene glycol diacrylate (TPGDA), lauric acid acrylate, isobornyl methacrylate (IBOMA), vinyl ether monomers, 1,6-hexanediol diacrylate (HDDA), trimethylolpropane triacrylate (TMPTA), 2-hydroxyethyl methacrylate (HEMA), hydroxypropyl acrylate (HPA) and glycerol acrylate (GMA); 2-phenoxyethyl acrylate (PHEA) is a commonly used UV active monomer, which has the characteristics of low odor, low irritation, low viscosity, good dilution, etc. It is suitable for water-based UV systems and can be matched with multifunctional oligomers to formulate products with high hardness and flexibility, and have low shrinkage, so it has good adhesion, heat resistance and hydrolysis resistance, and does not corrode metal substrates; bisphenol A diacrylate is a kind of active monomer, which has good curing performance and chemical stability; Tripropylene glycol diacrylate (TPGDA) is a commonly used UV-active monomer with good photocuring properties and chemical stability; lauric acid acrylate has high flexibility and is suitable for UV-curing coatings that require high flexibility; isobornyl methacrylate (IBOMA) provides hardness and chemical resistance and is suitable for UV-curing coatings that require chemical resistance and weather resistance; vinyl ether monomers can sometimes also be used as oligomers and are suitable for certain specific UV-curing coating systems; 1,6-hexanediol diacrylate (HDDA) has low viscosity and good flexibility and is suitable for occasions that require high hardness and water resistance; trimethylolpropane triacrylate (TMPTA) enhances crosslinking density, provides hardness and chemical resistance; 2-hydroxyethyl methacrylate (HEMA) improves adhesion and flexibility; hydroxypropyl acrylate (HPA) has excellent adhesion and flexibility; glycerol acrylate (GMA) enhances the chemical resistance and adhesion of coatings and adhesives.

[0061] An application of UV excimer skin-feel paint for relief melamine substrates, comprising the above-mentioned UV excimer skin-feel paint for relief melamine substrates, and further comprising the following steps:

[0062] Step 1, open melamine sheets such as embossed melamine sheets are fed to the production line;

[0063] Step 2, chamfering the melamine board described in step 1;

[0064] Step 3: Dust and clean the surface of the plate treated in step 2;

[0065] Step 4: Based on step 3, a single roller is used to apply the UV excimer skin-feel paint, and the hardness of the single roller is in the range of 10-15 degrees;

[0066] Step 5: continuously and uninterruptedly apply the UV excimer skin-feel paint to the plate after the roller coating in step 4 with a laser roller. The hardness of the rubber roller of the laser roller is in the range of 30-35 degrees. The combined coating amount of step 4 and step 5 is 12-16g / m 2 ;

[0067] Step 6: Perform infrared leveling on the plate after roller coating in step 5, with the infrared temperature at 40-50°C and the infrared time at 15-30S;

[0068] Step 7, pre-curing the LED microgel on the board processed in step 6;

[0069] Step eight, performing nitrogen protection UV excimer curing on the basis of step seven;

[0070] Step nine, using two gallium lamps and two mercury lamps to perform ultraviolet curing on the board cured in step eight;

[0071] Step 10: Test the board surface effect of step 9 and store it for later use.

[0072] It should be noted that: in the present invention, the embossed melamine board used for open painting is preferably a embossed melamine board with a high-density fiberboard substrate and a embossed melamine board with an LSB substrate in particleboard. Such substrates have high density and high flatness, and the embossed melamine board formed by pressing has better flatness and better deformation resistance, and is relatively easier to fill and level during the painting process. In order to better realize the above technical scheme, the rubber roller of the roller coater used in the process of the present invention has different requirements for hardness. The hardness of the rubber roller of the single-roll coater is required to be between 10-15 degrees. Under the condition of relatively heavy pressure on the plate, the low hardness rubber roller can make the paint enter the duct evenly, so that the paint coating on the duct is evenly applied; the hardness of the rubber roller of the laser roller coater is between 30-35 degrees. Under relatively light pressure, the rubber roller of general hardness can apply the paint on the flat surface of the substrate evenly. Compared with the conventional process, the present invention can save a bridging process of adhesion primer; the construction process is reduced, the paint coating amount is reduced, and the paint film opening effect is better; the viscosity and surface tension of the topcoat are lower, the paint penetration is better during construction, the duct and flat paint liquid are coated more evenly, and the paint film gloss is more uniform.

[0073] The application of UV excimer skin-feel paint for embossed melamine substrate provided by the present invention can solve the problem of paint film blooming caused by the shiny catheter during open coating of melamine substrate, and can also solve the problem of paint film bloated due to improper coating amount and uneven paint on the catheter causing exposed substrate points in the paint film. At the same time, the process is relatively simple, more efficient, lower energy consumption, less space, and the total coating amount of the paint is reduced, and the opening effect is better. At present, the embossed melamine substrate excimer opening process is currently generally adopted: the substrate is coated with UV adhesion primer bridge, and the process of applying topcoat after curing or the process of coating adhesion primer and bridge, applying transparent primer after curing, curing sanding, and then applying topcoat. The existing process has relatively more processes, high energy consumption, and large space occupation. At the same time, because there are many processes and the paint coating amount is large, the filling property of the paint to the substrate is increased, and the opening effect of the paint is reduced. In the process of the present invention, the melamine substrate can be exempted from pre-treatment, that is, the embossed melamine substrate is directly roller-coated with excimer skin-feel topcoat.

[0074] Example 1

[0075] The invention provides a UV excimer skin-feel paint for an embossed melamine substrate, comprising the following components in percentage by weight: 15% of a UV adhesion-promoting resin; 5% of a modified epoxy acrylate resin; 33% of a special modified polyurethane acrylate resin; 10% of an amino acrylate resin; 2% of a phosphoric acid-modified acrylate resin; 0.5% of a surface tension controller A; 0.5% of a surface tension controller B; 0.4% of a defoamer; 1.1% of an organosilicon feel aid; 0.3% of an organosilicon leveling aid; 4% of a photoinitiator C; 0.6% of a wetting dispersant; 2.6% of a polyethylene wax powder; and 25% of a UV active monomer.

[0076] Example 2

[0077] The invention provides a UV excimer skin-feel paint for an embossed melamine substrate, comprising the following components in percentage by weight: 26% of a UV adhesion-promoting resin; 6% of a modified epoxy acrylate resin; 29% of a special modified polyurethane acrylate resin; 8% of an amino acrylate resin; 2% of a phosphoric acid-modified acrylate resin; 0.5% of a surface tension controller A; 0.5% of a surface tension controller B; 0.4% of a defoamer; 1.1% of an organosilicon feel aid; 0.3% of an organosilicon leveling aid; 4% of a photoinitiator C; 0.6% of a wetting dispersant; 2.6% of a polyethylene wax powder; and 19% of a UV active monomer.

[0078] Example 3

[0079] The invention provides a UV excimer skin-feel paint for an embossed melamine substrate, comprising the following components in percentage by weight: 33% of a UV adhesion-promoting resin; 7% of a modified epoxy acrylate resin; 20% of a special modified polyurethane acrylate resin; 12% of an amino acrylate resin; 3% of a phosphoric acid-modified acrylate resin; 0.5% of a surface tension controller A; 0.5% of a surface tension controller B; 0.4% of a defoamer; 1.1% of an organosilicon feel aid; 0.3% of an organosilicon leveling aid; 5% of a photoinitiator C; 0.7% of a wetting dispersant; 3.5% of a polyethylene wax powder; and 13% of a UV active monomer.

[0080] Example 4

[0081] The invention provides a UV excimer skin-feel paint for an embossed melamine substrate, comprising the following components in percentage by weight: 44% of a UV adhesion-promoting resin; 6% of a modified epoxy acrylate resin; 20% of a special modified polyurethane acrylate resin; 6% of an amino acrylate resin; 3% of a phosphoric acid-modified acrylate resin; 0.5% of a surface tension controller A; 0.5% of a surface tension controller B; 0.4% of a defoamer; 1.1% of an organosilicon feel aid; 0.3% of an organosilicon leveling aid; 5% of a photoinitiator C; 0.7% of a wetting dispersant; 3.5% of a polyethylene wax powder; and 10% of a UV active monomer.

[0082] Example 5

[0083] The invention provides a UV excimer skin-feel paint for an embossed melamine substrate, comprising the following components in percentage by weight: 52% of a UV adhesion-promoting resin; 5% of a modified epoxy acrylate resin; 16% of a special modified polyurethane acrylate resin; 4% of an amino acrylate resin; 3% of a phosphoric acid-modified acrylate resin; 0.5% of a surface tension controller A; 0.5% of a surface tension controller B; 0.4% of a defoamer; 1.1% of an organosilicon feel aid; 0.3% of an organosilicon leveling aid; 1% of a photoinitiator C; 0.7% of a wetting dispersant; 3.5% of a polyethylene wax powder; and 9% of a UV active monomer.

[0084] The UV excimer skin-feel paint prepared in Examples 1-5 was subjected to a performance test. It was used on an embossed melamine substrate through the above application steps and tested and compared. The specific test methods are shown in Table 4, and the results are shown in Table 5.

[0085] Table 4

[0086]

[0087]

[0088] Table 5

[0089]

[0090]

[0091] The UV excimer skin-feel paint of the present invention has the following advantages in comparison with other UV excimer skin-feel paints on embossed melamine substrates:

[0092]

[0093] Compared with the existing technology, the process of the present invention has the following advantages:

[0094]

[0095]

[0096] In summary, the present invention provides a UV excimer skin-feel paint for an embossed melamine substrate, which can be directly applied on the embossed melamine substrate, so that the embossed melamine substrate can realize open coating of the excimer skin-feel paint, and the surface effect of the paint film after coating is good, the gloss of the board surface is uniform and not flowery, the duct is dust-free and not white, and the open effect is good; at the same time, the UV excimer skin-feel paint of the present invention can solve the problem of adhesion of the topcoat directly applied on the embossed melamine substrate; an application process of the UV excimer skin-feel paint for an embossed melamine substrate is also provided, and the one-glue-one-radium process of the closed coating process is applied to the open coating process, which significantly improves the flatness of the paint film, simplifies the construction process, improves production efficiency, and reduces energy consumption and cost.

[0097] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention still belong to the present invention.

Claims

1. A UV excimer skin-feel paint for embossed melamine substrate, characterized in that: The composition comprises the following weight percentages:

2. The UV excimer skin-feel paint for embossed melamine substrate according to claim 1, characterized in that: The UV adhesion promoting resin is a polyether type aromatic difunctional polyurethane acrylate resin.

3. The UV excimer skin-feel paint for embossed melamine substrate according to claim 1, characterized in that: The UV adhesion promoting resin is LT-4031 resin from Guangxin New Materials Technology.

4. The UV excimer skin-feel paint for embossed melamine substrate according to claim 1, characterized in that: The special modified polyurethane acrylate resin is HP6217 from Haohui New Materials.

5. The UV excimer skin-feel paint for embossed melamine substrate according to claim 1, characterized in that: The modified epoxy acrylate resin is ZC8801A from Zicai Chemical.

6. The UV excimer skin-feel paint for relief melamine substrate according to claim 1, characterized in that: The surface tension control agent A is TEGO Wet 270 produced by Evonik Degussa.

7. The UV excimer skin-feel paint for relief melamine substrate according to claim 1, characterized in that: The surface tension control agent B is an acetylene glycol surfactant.

8. The UV excimer skin-feel paint for relief melamine substrate according to claim 1, characterized in that: The photoinitiator C is ethyl 2,4,6-trimethylbenzoylphenylphosphinate.

9. An application of UV excimer skin-feel paint for embossed melamine substrate, characterized in that: The UV excimer skin-feel paint for embossed melamine substrate according to any one of claims 1 to 8 further comprises the following steps: Step 1, open melamine sheets such as embossed melamine sheets are fed to the production line; Step 2, chamfering the melamine board described in step 1; Step 3: Dust and clean the surface of the plate treated in step 2; Step 4, on the basis of step 3, a single roller is used to apply the UV excimer skin-feel paint; Step 5: Continuously and uninterruptedly apply the UV excimer skin-feel paint to the plate after roller coating in step 4 with a laser roller. The combined coating amount of step 4 and step 5 is 12-16g / m 2 ; Step 6: Perform infrared leveling on the plate after roller coating in step 5, with the infrared temperature at 40-50°C and the infrared time at 15-30S; Step 7, pre-curing the LED microgel on the board processed in step 6; Step eight, performing nitrogen protection UV excimer curing on the basis of step seven; Step nine, using two gallium lamps and two mercury lamps to perform ultraviolet curing on the board cured in step eight; Step 10: Test the board surface effect of step 9 and store it for later use.

10. The use of the UV excimer skin-feel paint for relief melamine substrate according to claim 9, characterized in that: The hardness range of the rubber roll of the single roller is 10-15 degrees; the hardness range of the rubber roll of the laser roller is 30-35 degrees.

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