CN121203462A

CN121203462A - A flexible, bendable UV excimer skin-feel colorant and its application

Info

Publication number: CN121203462A
Application number: CN202511533086.9A
Authority: CN
Inventors: 付见亮
Original assignee: Guangdong Libang Changrunfa Science And Technology Material Co ltd
Current assignee: Guangdong Libang Changrunfa Science And Technology Material Co ltd
Priority date: 2025-10-24
Filing date: 2025-10-24
Publication date: 2025-12-26

Abstract

The invention discloses an elastic bending UV excimer skin-feel color matching paint and application thereof, and relates to the technical field of paint, the color matching paint comprises a color matching base material A and a color matching base material B, wherein the color matching base material A comprises, by weight, 15-60% of functional acrylate resin, 5-10% of multifunctional polyurethane acrylate resin, 20-50% of polyurethane acrylate resin, 0.1-1% of leveling agent, 0.1-1% of defoaming agent, 0.1-2% of organosilicon handfeel auxiliary agent, 0.1-3% of photoinitiator A, 0.3-3% of photoinitiator B, 0.3-1% of wetting dispersant, 2-5% of UV anti-settling slurry, 2-8% of photoinitiator C, 5-20% of vinyl ether monomer and 0.5-3% of thiol initiator, the color matching base material B adopts aliphatic polyurethane acrylate resin, and the components of the color matching base material A and the color matching base material B are uniformly mixed and stirred according to a ratio of 10:1-2 in a roll coating construction. According to the invention, the elastic bending UV excimer skin-feel solid color paint with various colors is prepared by adding the high-concentration UV color paste, and the excimer skin-feel paint film has good yellowing resistance, good adhesive force, good bending property, good skin-feel effect and good vividness.

Description

Elastic bending UV excimer skin-feel color-mixing base material and application thereof

Technical Field

The invention relates to the technical field of paint, in particular to elastic bending UV excimer skin-feel color matching paint and application thereof.

Background

UV-sensitive paint as a high-end surface treatment material is in constant worldwide demand. In the domestic market, along with the promotion of consumer upgrading and environmental protection policy, the application of UV skin-feel paint in fields such as furniture, household appliances, buildings, electronic products, automotive interiors and the like is rapidly expanded. UV skin-feel paint is an important development direction for modern industrial paints and coatings because it can provide both a visually vivid color effect and a tactilely pleasant skin feel experience. World economies are down-going, resulting in enterprise competition for incandescence. Cost and efficiency are important issues in the development strategy of each enterprise. The coating application enterprises can directly add the UV color paste into the elastic bending UV excimer skin-feel color-mixing base material according to the self requirements, so that the elastic bending UV excimer skin-feel color-mixing paint with various colors can be prepared simply and conveniently. Is very flexible and convenient. The paint prepared by the elastic bending excimer color matching base material can be suitable for the whole automatic and intelligent coating of a large plate. High production efficiency and low production cost. The coated plate paint film can be bent and shaped according to the needs, so that the manufacturing process of paint application enterprises is simplified. The manufacturing cost of an application enterprise is reduced and the production efficiency is improved in terms of technology. For paint manufacturing enterprises, the elastic bending UV skin-feel color-mixing base material can be directly added with UV color paste to be prepared into skin-feel color-mixing paints with various colors according to the needs of customers. Is also very convenient and simple.

The elastic bending UV excimer skin-feel color-mixing base material can be prepared into elastic bending UV excimer skin-feel color-mixing paint with various colors by directly adding UV color paste. After the color paste is added, special dispersing equipment is not needed for dispersing, and only uniform stirring is needed, at the moment, the stirring can be carried out by using equipment for automatic stirring or manual stirring, and the elastic bending UV excimer skin-feel solid color paint with various colors can be prepared very simply. The production flexibility and the production efficiency are improved, and the cost is reduced. The elastic bending UV excimer skin-feel color-mixing base material can meet the cost-reducing and synergy requirements of paint manufacturing enterprises and the cost-reducing and synergy requirements of paint using enterprises. The market prospect is very wide. There is no relevant product on the market at present.

At present, a plate processing plant or a furniture plant in the market aims at a real-color excimer skin feel effect plate of a man-made fiber substrate veneer. The process generally adopted is melamine base material-roller coating UV adhesion primer-UV semi-curing-roller coating UV color primer-semi-curing-forward and reverse roller coating UV transparent primer-full curing-sanding-roller coating UV excimer skin-feel clear finish-excimer curing and UV curing. The plate paint film of the process paint cannot be bent, is only suitable for a plane, and is not suitable for a special-shaped surface. Some paint engineers make modulation improvements to the above problems, developing elastic adhesion primers, elastic UV color primers, elastic transparent primers, and elastic UV excimer skin feel topcoats. The artificial fiber base material veneer matched with the paint can be folded and modeled after the base material veneer is grooved. However, the paint can only be constructed by adopting the oil mixing process of color base and excimer surface cleaning. The color of the UV color primer reaches the color requirement, and then the UV excimer skin-feel clear surface reaches the surface effect requirement. Although the skin feel effect and the bending effect can be achieved, the color vividness of a paint film is poor and the decorative effect is poor due to the fact that the paint film is matched with a clear finish paint. And the process review cost is high. The following problems exist in the elastic bending UV excimer skin-friendly paint in the current market:

1. The UV excimer skin-feel color paint with high hiding power and high tinting strength is poor in adhesion. Pigments can severely block light penetration, compete with photoinitiators for ultraviolet absorption and scatter light. Pigments can hinder and reduce the initiation efficiency of paints, especially deep paint solutions. The higher the pigment concentration, the poorer the adhesion of the paint of the same initiating system. The more complex the composite color, i.e. the more pigment species, the poorer the paint adhesion. Because each pigment will block and absorb ultraviolet light, the narrower the pigment transmission window will be. To meet the UV paint adhesion, UV paint engineers typically employ a light pigment system, i.e., to minimize the paint pigment concentration level, and to reduce paint hiding power and tinting strength. Thus paint hiding power and tinting strength are relatively poor. Paint cannot meet hiding power and tinting strength effect requirements by one pass of coating.

2. The elastic bending UV excimer skin-feel color paint film has higher gloss and does not have good skin-feel effect. In order to enable the pigment-containing UV paint to cure well, a large amount of deep initiator such as TPO or XBPO is usually added. The higher the level of such initiator, the more excessive the pre-cure prior to excimer cure, resulting in the inability of the excimer to form a skin-feel film upon cure. High gloss paint films are often obtained.

3. The elastic bending UV excimer skin-feel color paint film is bent and has a cracking phenomenon. To enable the pigment-containing elastic bending UV excimer skin-feel paints to cure thoroughly, engineers typically use high functional resins and monomers in the formulation. The paint film formed by the high-functional resin and the monomer has high crosslinking density and high hardness. The dosage is controlled improperly, the formed paint film is brittle and can crack after bending. Meanwhile, the elasticity of a paint film can be influenced to a certain extent due to pigment and other powder. Because pigments are equivalent to skeletal structures, the strength of the paint film can be increased, and the paint film can be harder and more brittle.

The elastic bending UV excimer skin-feel paint has the problems of high hiding power and poor adhesion of high tinting strength, namely the elastic bending UV excimer skin-feel paint can only be made into light color paint and single color paint, and has poor effect of high gloss and poor skin-feel effect of a paint film, and the bending has the problems of cracking and the like. There are few elastic bending UV excimer skin-feel paints on the market.

Disclosure of Invention

The invention aims to provide an elastic bending UV excimer skin-feel color-mixing paint and application thereof, which aim to solve the problems, the invention prepares the elastic bending UV excimer skin-feel color-mixing paint with high hiding power and high tinting strength of various colors by adding UV color paste, the high-tinting-strength composite-color elastic bending UV excimer skin-feel paint can be prepared, the prepared paint has good adhesion, good skin-feel effect, good color vividness and good elastic bending property, and a paint film can be shaped according to requirements.

In order to achieve the above purpose, the present invention is realized by the following technical scheme:

the elastic bending UV excimer skin-feel color-mixing paint comprises a color-mixing base material A, wherein the color-mixing base material A comprises the following components in percentage by weight:

15-60% of functional acrylic resin

5-10% Of multifunctional polyurethane acrylate resin

20-50% Of polyurethane acrylic resin

0.1 To 1 percent of leveling agent

0.1 To 1 percent of defoaming agent

Organosilicon handfeel auxiliary agent 0.1-2%

0.1 To 3 percent of photoinitiator A

0.3 To 3 percent of photoinitiator B

Wetting dispersant 0.3-1%

UV anti-settling slurry 2-5%

Photoinitiator C2-8%

Vinyl ether monomer 5-20%

0.5-3% Of mercaptan initiator.

In the invention, the viscosity of the toning base material A is 600-1200CPS/25 ℃, the organosilicon of the leveling auxiliary agent is directionally arranged on the surface of a paint film, so that orange peel and brush marks are reduced, surface tension is reduced, paint liquid is quickly leveled after being coated to form a uniform film layer, mainly, leveling and shrinkage resistance are improved, and the leveling agent selected in the invention also has shrinkage resistance, cooperates with the organosilicon handfeel auxiliary agent, prevents surface defects caused by pigment addition, and ensures uniformity of skin touch feeling; the defoaming agent reduces local surface tension through air hydrophobic particles, so that bubbles are broken and escape, bubbles are prevented from being formed in the stirring and coating processes through destroying a bubble film layer, pinholes of a paint film are avoided, and a defoaming effect is mainly achieved. The organosilicon handfeel auxiliary agent is characterized in that polysiloxane chain segments are enriched to the surface in the curing process, the friction coefficient is reduced, the auxiliary agent migrates to the surface of a paint film to form a layer of low surface energy layer, the paint film is endowed with silky skin feel touch, the auxiliary agent also has wetting and dispersing functions, the pigment is uniformly distributed, and the scattering of curing light is reduced, so that the deep curing efficiency is indirectly improved, and the auxiliary agent can play roles of improving the handfeel, the smoothness of the paint film, the scratch resistance of the paint film, the defoaming property of the paint and the like.

Preferably, the functional acrylate is M151 resin of Kai flat market color chemical Co., ltd. The M151 resin is low-odor, strong in dilution capability, high in curing speed, excellent in yellowing resistance and low in shrinkage, is mainly used for low-odor and elastic UV paint, a formed paint film has a certain stretching length, the stretching length can reach 100%, the formed paint film can be folded back and forth for 100 times without breaking, the molecular structure of the M151 resin contains a large number of-OH functional groups, the adhesive force of the paint film is favorably improved, the matching color base material B component materials can be subjected to NCO-OH reaction, the paint film obtained after the UV free radical curing is subjected to NCO-OH curing synergy is good in toughness and elasticity, and meanwhile NCO-OH crosslinking can solve the problem that the photo-curing reaction of the deep-layer paint liquid of the UV color paint with high pigment concentration is insufficient, so that the paint liquid crosslinking is perfected, and the adhesive force is improved.

Preferably, the multifunctional urethane acrylate resin employs a nine-functional aliphatic urethane acrylate. According to the invention, HW-9008 resin of Hunan Xin Yu New Material Co is adopted as the nine-functional group aliphatic polyurethane acrylate, a high-crosslinking density network is formed by the nine-functional group aliphatic polyurethane acrylate when the UV is cured, so that the hardness and the wear resistance of a paint film are improved, but the polyurethane chain segments provide flexibility, stress is dispersed through a microphase separation structure, brittleness caused by high crosslinking is avoided, the working principle is that the nine-functional group aliphatic polyurethane acrylate is used as a crosslinking point in free radical polymerization, and is cooperated with the monofunctional resin, so that the rigidity and the elasticity of the paint film are balanced, and therefore, the paint prepared by the nine-functional group aliphatic polyurethane acrylate has the wear resistance and the stain resistance of super performance, the scratch resistance, the high fullness, the low irritation, the excellent adhesive force, the water resistance and the excellent chemical resistance, and the excellent surface hardness and the curing speed, and the hardness are hard but not brittle compared with other high-functional group resins in the market, the hardness and the toughness are very good, the influence on the elastic bending performance of the paint film is not great, the tensile strength of the paint film can be improved, the tensile strength of the paint film is great, and the paint film can resist bending stress from a substrate when the paint film is prevented from bending the substrate from being damaged by bending the substrate; because the resin has high functional group content, the resin can be quickly cured in the presence of pigment, and the dosage of a photoinitiator is reduced, so that the competing influence of the pigment on UV absorption is reduced, and the resin is mainly used for improving the hardness, scratch resistance and curing speed of paint, especially deep curing performance and adhesive force after color mixing.

Preferably, the polyurethane acrylate resin is ZC6482 resin of Kai flat market color chemical Co., ltd. In the invention, the ZC6482 resin has the advantages of high drying speed, good stretching rebound resilience, good stretching length of a formed paint film, 300% of stretching elongation and elastic bending function of the paint film, physical crosslinking points formed by polyurethane chain segments of the ZC6482 resin through hydrogen bonds and Van der Waals force, reversible deformation under stress, and capability of allowing the paint film to bend without cracking, low modulus and high elongation characteristic, interpenetrating network structure formed by the ZC6482 resin and functional acrylate resin, capability of enhancing the toughness of the whole paint film, aliphatic structure, excellent yellowing resistance, suitability for outdoor or high-requirement environments, good compatibility with vinyl ether monomers, and contribution to improving leveling property and curing efficiency.

Preferably, the photoinitiator A adopts phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, the photoinitiator B adopts (2, 4, 6-trimethylbenzoyl) bis (p-tolyl) phosphine oxide, and the photoinitiator C adopts methyl benzoate. In the invention, the photoinitiator A is JRCure1819 of a new material in a long time, the phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide is an acyl phosphine oxide photoinitiator with an absorption wavelength range of 300-400nm, can penetrate through a pigment layer to initiate deep curing, is uniformly cracked to generate benzoyl and phosphono free radicals under UV irradiation to initiate polymerization of acrylic ester double bonds, and the phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide absorbs peak blue shift in the curing process, reduces the obstruction to subsequent curing, is particularly suitable for high hiding power color paint, mainly plays a role of deep curing, and ensures that the deep curing of the paint is good after color matching and the adhesive force is good. The photoinitiator B is PhiCure 1301 of an Feiki material, the (2, 4, 6-trimethylbenzoyl) di (p-tolyl) phosphine oxide is a novel TMO type initiator, is used as a solid initiator, has good solubility with an oligomer and a reactive diluent, does not contain benzene, has good deep initiation effect, can greatly improve deep curability after paint is toned, improves adhesive force after paint is toned, has small gloss influence on UV (ultraviolet) sub-color skin-feel paint, is complementary to the photoinitiator A, absorbs short-wave UV of 350-380nm, improves surface curing efficiency, generates free radicals by decomposition under UV, preferentially initiates surface polymerization, prevents oxygen inhibition, enhances compatibility with resin by the toluene groups in a molecular structure of the photoinitiator B, reduces migration problems, ensures curing uniformity, is combined with a thiol initiator, and accelerates polymerization through hydrogen transfer reaction. The photoinitiator C is methyl benzoate which is an initiator with good yellowing resistance and mainly plays a role in curing an integral paint film, is an alpha-hydroxyketone photoinitiator which mainly absorbs medium wave UV (ultraviolet) of 300-350nm, is decomposed to generate benzoyl and methyl formate free radicals under the UV to initiate the surface to rapidly gel and is used for surface curing and pre-curing steps, and is matched with a gallium lamp in pre-curing to form a microgel structure, so that an ideal base surface is provided for subsequent excimer curing, and the decomposition product of the photoinitiator C has low volatility and cannot cause yellowing or odor problems of the paint film.

Preferably, the wetting dispersant is AIOX-UV3031 hyper-dispersant of novel Hunan Eddie new material, and the UV anti-settling slurry adopts hydrophobic fumed silica slurry. The wetting dispersant is favorable for wetting dispersion and viscosity reduction of wax powder, can improve the flow leveling property of paint, is adsorbed on the surface of pigment through an anchoring group and provides steric hindrance through a polymer chain to prevent pigment flocculation and sedimentation, the amphiphilic structure of the wetting dispersant forms a stable layer at a pigment-resin interface to ensure uniform pigment dispersion and improve tinting strength and hiding power, the AIOX-UV3031 hyper-dispersant belongs to hyper-dispersant with a hyperbranched high molecular structure, and the hyper-dispersant shows excellent color development property on carbon black and organic pigment in solvent type paint and ink systems, can improve the compatibility of color paste, has anti-flooding property and anti-flowering property, has excellent fluidity and long-time storage stability, improves the tinting strength, and the AIOX-UV3031 hyper-dispersant also contains a reactive group to participate in crosslinking in UV curing to chemically bond the pigment into a paint film, thereby reducing negative effects of pigment on adhesive force and elasticity. The UV anti-settling slurry is hydrophobic fumed silica slurry prepared by using the Vigorboom long hair-moistening grinding, the silica particles form a hydrogen bond network, the silica particles thicken when standing, become thin under shearing, ensure storage stability and coating fluidity, increase system thixotropy, prevent pigment settling, and the hydrophobic fumed silica also has UV transparency, does not interfere curing light penetration, has good compatibility with resin after surface modification, and does not introduce moisture or impurities.

Preferably, the vinyl ether monomer is divinyl glycol divinyl ether, and the mercaptan initiator is 2-ethyl-2- (((3-mercaptobutyryl) oxy) methyl) propane-1, 3-diylbis (3-mercaptobutyrate). The vinyl ether monomer is used as a reactive diluent and a cross-linking agent to participate in free radical and cationic polymerization, the vinyl ether group has high reactivity and can react with mercaptan to form a flexible chain segment, a multi-functional group vinyl ether structure of the vinyl ether monomer can be used for increasing a cross-linking point through a multi-functional group structure of the vinyl ether monomer, but the flexibility is not caused by ether bond, in the invention, the vinyl ether monomer adopts VM-3520 of the Shenzhen super-cationic technology, the monomer has low viscosity, low odor, low yellowing, low toxicity, high adhesive force and high flexibility, the monomer can promote paint film adhesive force, the vinyl ether monomer can react with free radical cross-linking reaction and mercaptan initiator to react with mercaptan-olefin, the multi-functional group vinyl ether structure of the vinyl ether monomer can react with mercaptan to form a network structure with extremely high cross-linking density, the high cross-linking density is favorable for curing UV color paint with high pigment concentration, the deep layer of the paint is favorable for improving the adhesive force of the paint, and meanwhile, the connecting section in the network structure is an ether flexible connecting section, so that the paint film is hard and the adhesive force is not favorable for improving the brittleness rate of the paint. In the invention, the thiol initiator is KarenzMT TPMB of Showa electric Co, the thiol initiator initiates a polyfunctional vinyl ether monomer, a plurality of reaction points can form a highly crosslinked network, the curing speed is high, the highly crosslinked network and the high curing speed are favorable for curing the UV colored paint with high pigment concentration and deep curing of the paint, and meanwhile, the thiol initiator has good antioxidant polymerization inhibition effect.

Preferably, the color matching base material B is further included, and comprises the following components in percentage by weight of 100% of aliphatic polyurethane acrylate resin. The described tinting binders B employ aliphatic urethane acrylate resins whose acrylate end groups participate in UV crosslinking, while the urethane backbone provides flexibility, forms a complementary network with tinting binders a, provides additional elasticity and color acceptance when mixed with tinting binders a, and whose aliphatic structure imparts excellent weatherability and resistance to yellowing to the paint film. The resin also has low viscosity, is convenient to mix with UV color paste, does not need additional dilution, and ensures stable paint film performance after color mixing. The bending property and the skin feel effect are optimized by the cooperation of the resin in the color-mixing base material A.

Preferably, the aliphatic urethane acrylate resin is a basf LR 9000 resin. In the invention, the molecular structure of the LR 9000 resin contains 14-15% of NCO groups, when the photo-curing reaction is finished, the NCO groups in the molecular structure can continuously react with-0H groups of the system under the condition of no illumination, so that the crosslinking density of a paint film is further improved, the problem of insufficient deep reaction of the high-pigment-concentration UV colored paint can be solved, and the paint adhesive force is improved; the adhesive force between the elastic bending UV excimer surface and the primer is enhanced, and the adhesive force can obviously improve the bending performance of the paint film.

The application of the elastic bending UV excimer skin-feel color-changing paint is applied to any one of the elastic bending UV excimer skin-feel color-changing paint, and comprises the following steps:

Step one, loading the homochromatic melamine plate to a production line;

Step two, sanding and chamfering the melamine board in the step one and lightly polishing the melamine board;

step three, carrying out primary dust removal on the surface of the plate processed in the step two;

Step four, a UV adhesive primer is coated on the basis of the step three in a roll coating way, wherein the coating amount is 8-10g/m ²;

In the invention, the semi-curing uses the mercury lamp, which can output the wave length of 365nm and 405nm, so that the primer is partially crosslinked to form a porous structure, thereby facilitating the penetration and anchoring of the finish paint;

Step six, roll-coating the color-mixing base material A of the color-mixing elastic bending UV excimer skin-feel color-mixing paint and the matched color-mixing base material B on the basis of the step five, wherein the color-mixing base material A and the color-mixing base material B are mixed according to the proportion of 10:1-2 before roll-coating, are manually and evenly stirred, and the coating weight is 10-30g/m ² during roll-coating.

In the invention, the gallium lamp is used for pre-curing, and the wavelength is output to 405-420nm, so that the paint liquid forms microgel, and sagging is avoided;

In the invention, an excimer lamp (with the output wavelength of 172 nm) is used for excimer curing, and high-energy ultraviolet rays directly crack C=C bonds on the surface of a paint film to form a crosslinked structure, so that a low-gloss skin feel effect is generated, and the excimer curing is independent of a photoinitiator, so that the effect of pigment shielding is avoided, and the curing problem of the high-hiding-power color paint is solved;

And step nine, adopting four iron lamps to align the molecular film for curing on the basis of step eight, so as to fully cure the paint, wherein the output main peak wavelength of the iron lamps is 358-404 nanometers, and the temperature of the panel surface reaches 60-70 ℃, and the spectrum of the iron lamps is very wide and complex and comprises ultraviolet light, visible light and partial infrared light, wherein the ultraviolet light can be used for photo-curing, the infrared light can be used for heating a panel, and the panel heating has a catalytic acceleration effect on the subsequent dark curing of mercaptan-olefin and NCO crosslinking curing of a paint film. Compared with an iron lamp and other curing lamps, the temperature of the surface of the cured iron lamp is 20-25 ℃ higher than that of the surface of the cured iron lamp, the temperature can reach 60-70 ℃, the higher the surface temperature is, the faster and more thorough the subsequent dark curing and NCO crosslinking curing speeds of a paint film are, the more favorable improvement of the adhesive force of the paint film is achieved, and the output main peak wavelengths of the iron lamp are 358 nm, 372 nm and 404nm, so that the cured iron lamp is very suitable for curing deep-color paint and deep-layer curing. The process of the invention not only utilizes the ultraviolet rays of the iron lamp, but also utilizes the main peak wavelength 358-404nm of the iron lamp to finish deep curing, and assists in improving the adhesive force of a paint film, and the output spectrum of the iron lamp is matched with a photoinitiator A, B, C, so that thorough curing is ensured, excessive crosslinking is avoided, brittleness is avoided, the temperature of the panel surface is 60-70 ℃ to facilitate stress release, and further bending cracking is prevented.

Step ten, carrying out preliminary online detection on the plate surface in the step nine, detecting whether bubbles and particles exist on the plate surface, and marking unqualified plates;

And eleventh, protecting and taking off the plate processed in the tenth step by sticking a protective film, and simultaneously immediately laminating, stacking and stacking the plates when taking off the wire, so that the plate surface temperature is recovered to the normal temperature for 4-6 hours. In the invention, the temperature of the plate surface after the iron lamp is solidified is higher, the plate surface heat dissipation speed can be reduced by immediately laminating, piling and stacking plates, the plate surface keeps high temperature for a long time, 4-6 hours are generally required for returning the plate surface temperature to normal temperature after lamination, if the plate is not laminated for half an hour, the plate surface temperature is returned to normal temperature, the dark solidification and NCO crosslinking solidification are not facilitated, and the high temperature of 4-6 hours can fully promote the dark reaction and NCO crosslinking reaction of paint, so that the paint film which is insufficient in deep photocuring due to high pigment concentration is further solidified and crosslinked, and a high-strength paint film is formed.

According to the invention, the application of the elastic bending UV excimer skin-feel color-changing paint can solve the problem that the paint film has poor adhesive force caused by insufficient irradiation energy in the lower deep layer of the paint due to the fact that the UV excimer skin-feel color-changing paint contains high-concentration composite pigment, and also can solve the problem that the paint film has poor skin-feel effect caused by higher gloss due to the fact that the paint uses more initiator absorbing long-wave ultraviolet.

The elastic bending UV excimer skin-feel color matching paint and the application thereof have the following beneficial effects:

1. And the paint film hiding power and the paint film adhesion are balanced. The invention realizes deep curing of various composite colors with high hiding power and high tinting strength by using UV free radical curing, thiol-ene system curing, dark curing and NCO group cross-linking curing triple hybrid curing, so that the paint has good adhesive force at high pigment concentration content, and the main realization method is that; firstly, using UV free radical to cure, basically shaping the paint liquid, ensuring that a paint film has certain physical and chemical properties, and fully converting and curing the deep paint liquid through the synergistic curing of dark curing and NCO group crosslinking curing, wherein the conversion efficiency of the lower paint liquid is low, the conversion is not complete, the lower paint liquid is not completely converted, the lower paint liquid is further converted through the dark curing of a thiol-ene system, and the crosslinking reaction is further carried out through-NCO bonds contained in resin molecules;

2. The invention discloses a full-matte paint film, which is prepared by compounding deep layer photoinitiators with various different absorption wavelengths and pre-curing by using gallium lamps of an electronic light source to control energy, wherein the pre-curing degree of paint before the excimer curing is more thorough, and because even a small amount of ultraviolet energy can completely cure the paint, the excimer paint film is difficult to obtain when the paint excimer is cured.

3. In order to reduce the influence of the monomer on the flexibility of the paint film, the invention does not use a conventional UV active monomer, and meanwhile, in order to counteract the influence of balanced powder on the bending performance of the paint film, the invention uses a part of flexible polyurethane resin with rebound resilience of the paint film to improve the bending performance;

4. The invention can obtain the elastic bending UV excimer skin-feel color-mixing base material, the base material can be prepared into UV excimer skin-feel color-mixing paint with various colors after color paste is added, the paint film has good surface effect, good adhesive force and good paint film elasticity, the paint film can be bent to make various shapes, the cost of paint manufacturing enterprises and paint using enterprises is reduced, and the paint production efficiency is improved.

Detailed Description

In order to better understand the technical solution of the present invention, the following describes the product of the present invention in further detail with reference to examples.

It is noted that 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Examples

The elastic bending UV excimer skin-feel color matching paint comprises a color matching base material A and a color matching base material B, wherein the color matching base material A comprises the following components in percentage by weight, namely 40% of functional acrylate resin, namely M151 resin of Kai flat market color chemical industry Co-Ltd; 7% of multifunctional polyurethane acrylate resin, 35% of HW-9008 resin of Hunan Xin Yu New material Co, 35% of polyurethane acrylate resin, ZC6482 resin of Hunan color chemical Co, 0.5% of flatting agent, 0.5% of defoamer, 0.5% of organosilicon handfeel aid, 1% of photoinitiator A, JRCure1819 of longday new material, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1% of photoinitiator B, phiCure 1301 of FeKai material, AIOX-UV3031 super-dispersant of (2, 4, 6-trimethylbenzoyl) bis (p-tolyl) phosphine oxide of Hunan Eddie special material, 1% of UV anti-settling slurry, 2% of photoinitiator C, 10% of benzoyl methyl formate, 10% of vinyl ether monomer, VM-3520 of Zhen's preferred technology, triethylene glycol divinyl ether, 1% of thiol and 3-2- (-2-ethyl butyl acrylate) of the following aliphatic group (3-3% of butyl acrylate) of the following aliphatic group, the LR 9000 resin of basf was used.

Examples

An elastic bending UV excimer skin-feel color matching paint comprises a color matching base material A and a color matching base material B, wherein the color matching base material A comprises the following components in percentage by weight of functional acrylic resin 55%, and M151 resin of Kai flat market color chemical Co-Ltd is adopted; 5% of multifunctional polyurethane acrylate resin, 20% of HW-9008 resin of Hunan Xin Yu New material Co., ltd, 20% of polyurethane acrylate resin, AIOX-UV3031 super-dispersant of Kaisha Eddie special material, 2% of UV anti-sedimentation slurry, 2% of hydrophobic gas phase silicon dioxide slurry, 1% of photo-initiator C2%, 1% of photo-initiator A, JRCure1819 of longday new material, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1% of photo-initiator B, phiCure 1301 of FeKai material, (2, 4, 6-trimethylbenzoyl) bis (p-tolyl) phosphine oxide, 0.5% of wetting dispersant, AIOX-UV3031 super-dispersant of Hunan Eddie special material, 10% of vinyl ether monomer, VM-3520 of super-cationic vinyl ethylene glycol ether, 1% of thiol and 3-2-ethyl butyrate (3% of ethyl butyl acrylate) of the following formula 1- (-3-2% of butyl acrylate resin, the LR 9000 resin of basf was used.

Examples

The elastic bending UV excimer skin-feel color matching paint comprises a color matching base material A and a color matching base material B, wherein the color matching base material A comprises the following components in percentage by weight, namely, functional acrylic resin 30%, and M151 resin of Kai flat market color chemical Co-efficient; 10% of multifunctional polyurethane acrylate resin, 40% of HW-9008 resin of Hunan Xin Yu New material Co., ltd, 40% of polyurethane acrylate resin, AIOX-UV3031 super-dispersant of Hunan Eddie special new material, 2% of UV anti-sedimentation slurry, 2% of hydrophobic gas phase silicon dioxide slurry, 2% of photoinitiator C, 1% of methyl benzoate, 10% of vinyl ether monomer, JRCure1819 of Kaolin, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1% of photoinitiator B, phiCure 1301 of FeKaiki material, AIOX-UV3031 super-dispersant of Hunan Eddie special material, 2% of hydrophobic gas phase silicon dioxide slurry, 1% of photoinitiator C, 1% of vinyl ether monomer, VM-3520 of super-cationic vinyl ethylene glycol, 1% of thiol and 3-2-ethyl butyrate (3-3% of butyl acrylate) of the following formula 1- (-3-2% of butyl acrylate resin, the LR 9000 resin of basf was used.

Examples

An elastic bending UV excimer skin-sensitive color matching paint comprises a color matching base material A and a color matching base material B, wherein the color matching base material A comprises, by weight, 35% of functional acrylate resin, 7% of multifunctional polyurethane acrylate resin, 7% of HW-9008 resin of Hunan Xinyu New material Co., ltd., 30% of polyurethane acrylate resin, 30% of ZC6482 resin of Hunan Xinyu New material Co., ltd., 0.5% of flatting agent, 0.5% of defoaming agent, 1.5% of organosilicon handfeel aid, 1% of photoinitiator A, JRCure1819 of a long-day new material, JRCure1819 of phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1% of photoinitiator B, 351301 of a Kai Fei material, karenzMT TPMB of (2, 4, 6-trimethylbenzoyl) bis (p-tolyl) phosphine oxide, 0.5% of wetting dispersant, AIOX-30354% of a special new material of Hunan Xinyu Chen, 1% of dispersant, 3-2-vinyl butyl alcohol, 3-vinyl butyl alcohol (2-vinyl butyl alcohol) of ethylene glycol (3% of ethyl vinyl alcohol) of which the weight is 2, 3% of ethyl vinyl butyl alcohol (3-vinyl alcohol) of ethyl methacrylate) of ethylene glycol (3-vinyl ether) of ethylene glycol (3), the LR 9000 resin of basf was used.

Examples

The elastic bending UV excimer skin-feel color matching paint comprises a color matching base material A and a color matching base material B, wherein the color matching base material A comprises the following components in percentage by weight, namely, functional acrylic resin 45% and M151 resin of flat market pose color chemical industry Co., ltd; 5% of multifunctional polyurethane acrylate resin, namely HW-9008 resin of Hunan Xinyu New Material Co., ltd; 32% of polyurethane acrylate resin, which is ZC6482 resin of Kai flat market color chemical Co., ltd; 0.5% of leveling agent, 0.5% of defoamer, 0.5% of organosilicon handfeel aid, 0.5% of photoinitiator A, JRCure1819 of new material in long time, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 0.5% of photoinitiator B, phiCure 1301 of Fekka material, (2, 4, 6-trimethylbenzoyl) di (p-tolyl) phosphine oxide, 0.5% of wetting dispersant, AIOX-UV3031 super dispersant of new material in Hunan Eddie, 2% of UV anti-settling slurry, hydrophobic fumed silica slurry, 2% of photoinitiator C, methyl benzoate, 10% of vinyl ether monomer, VM-3520 of Shenzhi's Uyang, 1% of thiol initiator B, karenzMT TPMB of Zhaoand electrical engineering Co., ltd, 2-ethyl-2- (((3-yl butyryl) oxy) methyl) propane-1, 3-diylbis (3-mercapto) butyrate) as follows, the following polyurethane base comprises 100% of aliphatic color-mixing resin, the LR 9000 resin of basf was used.

Examples 1 to 5 carrying out the procedure

An application of elastic bending UV excimer skin-feel color-mixing paint comprises the following steps:

Step one, loading the homochromatic melamine plate to a production line;

Step four, coating UV adhesive force primer on the basis of the step three, wherein the coating weight is 8-10g/m < 2 >;

Step five, carrying out ultraviolet curing by using 2 mercury lamps on the basis of the step four, wherein the energy is 200-300mJ/cm < 2 >, so that the paint is semi-cured;

Step six, adding 10% of UV color paste to the color-mixing base material A for color mixing on the basis of the step five, and then rolling the color-mixing base material A of the color-mixing elastic bending UV excimer skin-feel color-mixing paint and the matched color-mixing base material B, wherein the color-mixing base material A is mixed with the color-mixing base material B according to the ratio of 10:1 before rolling, the mixture is manually stirred uniformly, and the coating weight is 15-20g/m < 2 > during rolling;

Step seven, pre-curing the paint by using a gallium lamp on the basis of the step six, and strictly controlling the energy to be 50-100mJ/cm < 2 >, so that the paint liquid forms microgel, and the paint liquid is sticky but not transferred;

step eight, performing excimer curing on the basis of the microgel obtained in the step seven, wherein the output main peak wavelength of an excimer lamp is 172nm, and the energy is 500-800mJ/cm < 2 >, so as to form a matte skin-feel surface;

Step nine, adopting 4 iron lamps to align the molecular films for curing on the basis of the step eight, and raising the temperature of the plate surface to 60-70 ℃ to fully cure the paint, wherein the total energy is 800-1200 mJ/cm <2 >;

And eleventh, sticking a protective film on the plate processed in the tenth step, protecting and taking off the plate, and immediately laminating, stacking and stacking the plate when taking off the plate, standing for 4-6 hours in a heat-preserving state, and slowly cooling the plate surface to room temperature.

Comparative example 1

An elastic bending UV excimer skin-feel color matching paint comprises 41% of a functional acrylic resin, 7% of a multifunctional polyurethane acrylic resin, 7% of HW-9008 resin of Hunan Xin Yu New material Co, 35% of a polyurethane acrylic resin, 35% of ZC6482 resin of Hunan Xin Yu New material Co, 0.5% of a leveling agent, 0.5% of a defoaming agent, 0.5% of an organosilicon handfeel aid, 1% of a photoinitiator A, JRCure1819 of a Sunday new material, 1% of a phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide, phiCure% of a Kai material, 0.5% of a wetting dispersant, AIOX-30324% of a Hunan Eddie special new material, 1% of a hydrophobic silica super-initiator, and 35% of a vinyl alcohol, wherein the UV is a silicone resin is a vinyl alcohol, and the UV resin is a UV light-absorbing resin, wherein the UV light-absorbing resin comprises 35% of a light-absorbing resin, the UV light absorbing resin is a light absorbing resin, the UV light absorbing resin is a UV light absorbing resin, the UV light absorbing ultraviolet light, the UV light absorbing ultraviolet light absorbing color matching paint, the UV light absorbing color matching paint comprises the UV light absorbing color matching paint, the UV light.

Comparative example 1 Process

Step one, loading the homochromatic melamine plate to a production line;

step nine, adopting 4 iron lamps to align the molecular films for curing on the basis of the step eight, and improving the total energy to be more than 1500 mJ/cm < 2 >, so that the paint is fully cured;

Comparative example 2

The elastic bending UV excimer skin-feel color matching paint comprises a color matching base material A, wherein the color matching base material A comprises the following components in percentage by weight, namely 40% of functional acrylate resin, namely M151 resin of Kai flat market color chemical industry Co., ltd; 7% of multifunctional polyurethane acrylate resin, 35% of HW-9008 resin of Hunan Xin Yu New material Co., ltd, 35% of polyurethane acrylate resin, AIOX-UV3031 super-dispersant of Hunan Eddie special material, 1% of UV anti-sedimentation slurry, 0.5% of foam killer, 0.5% of organosilicon handfeel aid, 1% of photoinitiator A, JRCure1819 of Jiujia new material, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1% of photoinitiator B, phiCure 1301 of Feiki material, AIOX-UV3031 super-dispersant of (2, 4, 6-trimethylbenzoyl) bis (p-tolyl) phosphine oxide, 0.5% of wetting dispersant, AIOX-UV anti-sedimentation slurry, 1% of hydrophobic gas phase silica slurry, 2% of photoinitiator C, 10% of benzoyl methyl formate, 10% of vinyl ether monomer, VM-3520 of Zhen's preferred technology, triethylene glycol divinyl ether, 1% of thiol and thiovinyl 3- (-2-ethyl butyrate) of the formula (3, 3-thiobutyl) of thiovinyl alcohol.

Comparative example 2 Process

Step one, loading the homochromatic melamine plate to a production line;

Step six, adding 10% of UV color paste to the color-mixing base material A for color mixing on the basis of the step five, and then rolling the color-mixing base material A of the color-mixing elastic bending UV excimer skin-feel color-mixing paint, wherein the color-mixing base material A is stirred uniformly manually, and the coating amount is 15-20g/m < 2 > during the rolling;

Comparative example 3

The elastic bending UV excimer skin-feel color matching paint comprises a color matching base material A and a color matching base material B, wherein the color matching base material A comprises the following components in percentage by weight, namely, functional acrylic resin 30%, and M151 resin of Kai flat market color matching chemical Co., ltd; the multifunctional polyurethane acrylate resin comprises 40% of HW-9008 resin of Hunan New material, 0.5% of leveling agent, 0.5% of defoaming agent, 1% of organosilicon handfeel aid, 1% of photoinitiator A, JRCure1819 of new material in long term, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1% of photoinitiator B, phiCure 1301 of Fekka material, (2, 4, 6-trimethylbenzoyl) bis (p-tolyl) phosphine oxide, 0.5% of wetting dispersant, AIOX-UV3031 hyperdispersant of Hunan Eddie new material, 2% of UV anti-settling slurry, 2% of hydrophobic fumed silica slurry, 2% of photoinitiator C, 10% of benzoyl methyl formate, 1% of vinyl ether monomer, 3520 of VM-3520 of Shengzhi's super sun technology, karenzMT TPMB of thiol initiator B, 2-ethyl-2 ([ 3-mercapto ] 3-butyl ] mercapto ] propane, and 100% of butyl acrylate resin, wherein the resin comprises the following aliphatic polyester resin of the following group of percentage by weight.

Comparative example 3 Process

Step one, loading the homochromatic melamine plate to a production line;

step seven, pre-curing the paint by using a gallium lamp on the basis of the step six, and strictly controlling the energy to be 30-50mJ/cm <2 >, so that the paint liquid forms microgel, and the paint liquid is sticky but not transferred;

Step nine, adopting 4 iron lamps to align the molecular films for curing on the basis of the step eight, wherein the total energy is 500-800 mJ/cm < 2 >, so that the paint is fully cured;

Performance testing

Technical index tests and evaluations were performed on the paint coatings prepared in the above examples 1 to 5 and comparative examples 1 to 3 according to the national standard of the people's republic of China GB/T23999-2009 "solvent type polyurethane woodware paint for interior decoration", and the results are shown in Table 1 below

Table 1:

Test item

Technical index requirements

Example 1

Example 2

Example 3

Example 4

Example 5

Comparative example 1

Comparative example 2

Comparative example 3

Adhesive force (dividing lattice spacing 1 mm)

≤1

0

2

1

Pencil hardness (scratch)

≥H

2H

3H

2H

H

2H

4H

Dry heat resistance (70 ℃ C.)

≤2

1

2

3

Wear resistance (750 g, 500 r)

≤50mg

45

48

42

46

44

65

60

55

Liquid resistance (30% ethanol, 24 h)

No abnormality

Slightly light-lost

No abnormality

Liquid resistance (5% acetic acid, 24 h)

No abnormality

Obvious light loss

Slightly light-lost

No abnormality

Liquid resistance (Green tea water, 24 h)

No abnormality

Slight discoloration

No abnormality

Yellowing resistance

1.5

1.6

1.4

1.7

1.5

2.0

3.5

1.3

Gloss (60 degree)

5

4

5

6

5

4

Flexibility/impact resistance

Excellent in

Good quality

Excellent in

Difference of difference

In general

Difference of difference

Surface defects

Without any means for

Slight

Without any means for

Obvious and obvious

Slight

Obvious and obvious

For the above table, the result analysis was performed:

adhesion force according to GB/T9286 standard (cross-cut) test, the 0 grade is the best, the 5 grade is the worst, the lower the grade, the better the adhesion force, all the examples 1-5 reach the best 0 grade, which shows that the coating is extremely firm to the substrate, mainly because the functional acrylate resin (M151) and the polyurethane acrylate resin (ZC 6482) in the examples 1-5 provide good film forming property and cohesive force, the color matching base B (LR 9000) is used as a high-elasticity aliphatic polyurethane acrylate, the adhesion force and flexibility between the coating and the substrate are greatly enhanced, and the thiol initiator (KarenzMT TPMB) and the vinyl ether monomer (VM-3520) in the formula generate efficient 'thiol-ene' click chemical reaction under the photoinitiation. The reaction conversion rate is high, the reaction speed is high, a compact and smaller crosslinking network can be formed, the internal stress generated by volume shrinkage is reduced, the coating is prevented from being stripped from a substrate, and the adhesive force is obviously improved, the result of comparative example 1 is grade 2, the adhesive force is obviously reduced mainly because a mercaptan initiator is absent in the formula of comparative example 1, no mercaptan-alkene reaction exists, the curing process mainly depends on free radical polymerization of acrylate double bonds, the reaction volume shrinkage is larger, higher internal stress is generated, the coating is caused to be locally lifted from the substrate, the adhesive force is poor, the result of comparative example 2 is grade 1, the adhesive force is inferior to that of examples 1-5, mainly because a color-mixing base material B (LR 9000) is absent in the formula of comparative example 2, the LR 9000 resin plays a key role in improving the adhesive force of the whole coating to a melamine board, and the defect of the resin directly leads to degradation of the adhesive force.

Pencil hardness the higher the hardness, the better the scratch resistance, the higher the grade from soft to hard, of 6B to 6H, measured according to the standard of GB/T6739 "paint film hardness measured by the colour paint and varnish pencil method", the test results of examples 1-5 are between 2H-3H, which are excellent and moderate in hardness, mainly because the functional acrylate resin (M151) in examples 1-5 provides the basic hardness and rigidity, the multifunctional urethane acrylate resin (HW-9008) provides the high crosslinking density to increase the hardness, while the urethane acrylate resin (ZC 6482) and the aliphatic urethane acrylate resin (LR 9000) impart toughness and elasticity to prevent the excessive hardness from becoming brittle. The result of comparative example 3 is 4H, which is the highest hardness in examples 1-5 and comparative examples 1-3, but at the expense of flexibility, where the formulation is up to 40% of the multifunctional urethane acrylate resin (HW-9008) and the urethane acrylate (ZC 6482) is missing, the multifunctional resin means more reactive sites per molecule, resulting in a very high density of three-dimensional crosslinked network, resulting in very hard but extremely brittle coatings.

Abrasion resistance according to the GB/T1768 abrasion resistance test of the rotating rubber grinding wheel method for determination of abrasion resistance of paints and varnishes, the weight loss is smaller, the abrasion resistance is better, the results of examples 1-5 are between 42 and 48mg, the abrasion resistance is excellent, in the formulations of examples 1-5, the polyfunctional urethane acrylate resin (HW-9008) provides crosslinking density, the thiol-ene reaction ensures the integrity of the network, the aliphatic urethane acrylate resin (LR 9000) resists abrasion by absorbing and dispersing stress, the result of comparative example 1 is 65mg, the abrasion resistance is poor mainly because the lack of thiol initiator in the formulation of comparative example 1 may cause defects in the crosslinked network, the coating is more easily abraded under friction, the result of comparative example 2 is 60mg, the abrasion resistance is poor mainly because the lack of aliphatic urethane acrylate resin (LR 9000) in the formulation of comparative example 2, and the toughness and durability of the coating are reduced, resulting in the abrasion resistance being inferior to that of examples 1-5.

The liquid resistance is determined to be the best according to GB/T4893.1 standard test of liquid resistance measurement method of paint film on furniture surface, wherein the standard is no abnormality, no light loss, no color change, no bubbling and the like, and the results of the examples 1-5 are all abnormal, and have excellent liquid resistance, mainly because the paint of the examples 1-5 can form a paint film surface with high crosslinking density and compactness, so that chemicals are difficult to penetrate into the whole network, the high conversion rate of thiol-ene reaction in the formula reduces unreacted monomers, the monomers are weak points of chemical attack, and the surface layer is highly crosslinked by irradiation of an excimer lamp 172nm, so that a very durable paint film surface is formed. The result of comparative example 1 is slight to significant loss of gloss, mainly due to lack of thiol initiator, insufficient densification of the crosslinked network, and the presence of more unreacted polar groups, more penetration of polar solvents such as ethanol and acetic acid into the paint film, causing swelling or extraction, manifesting as loss of gloss.

The yellowing resistance is determined according to GB/T23987 standard test of artificial weathering exposure to fluorescent ultraviolet rays and water of color paint and varnish coatings, the smaller the delta E value is, the smaller the color change is, the better the yellowing resistance is, and the results of examples 1-5 and comparative examples 1 and 3 are that delta E is less than 2.1, and all the examples show good yellowing resistance, mainly because the formula contains a large amount of polyurethane acrylate resin (ZC 6482) and aliphatic polyurethane acrylate resin (LR 9000), the aliphatic structure does not contain benzene rings, and ultraviolet rays are not easy to absorb to generate chromophores, so that the yellowing resistance is excellent. The result of comparative example 2 is Δe=3.5, and yellowing is remarkable mainly because the color matching base B aliphatic urethane acrylate resin (LR 9000) is completely absent from the formulation of comparative example 2, and the aliphatic urethane acrylate resin (LR 9000) is also aliphatic, but the absence of the aliphatic urethane acrylate resin (LR 9000) is a high-performance aliphatic urethane acrylate, and the coating layer has a short plate against ultraviolet rays, so that yellowing is aggravated.

The gloss (60 DEG) is measured according to GB/T9754 standard test of 20 DEG, 60 DEG and 85 DEG specular gloss measurement of paint films of paint and varnish containing no metal pigment, the lower the gloss (closer to 0 GU) is for the "skin feel" effect, the stronger the matte effect and the skin feel are, the excellent low gloss is realized in the results of examples 1-5 and comparative examples 1-3, which are all 4-6 GU, mainly realized by an excimer curing process, the absorption of 172nm wavelength excimer light energy by oxygen in the air generates ozone, and the surface of the coating generates a micron-sized coarse structure, and the diffuse reflection of light is generated on the micro uneven surface, so that a strong matte skin feel effect is formed, and each formula can be applied to the process.

Flexibility/impact resistance the criteria were judged to be better by elastic bending test or GB/T1732 "paint film impact resistance test" that can withstand smaller diameter bending or larger energy impact without cracking, examples 1-5 were excellent or good, and exhibited excellent flexibility, mainly because of the formulation of examples 1-5 having aliphatic urethane acrylate resin (LR 9000) with an aliphatic long chain structure imparting excellent stretchability and resilience to the coating, and the network formed by thiol-ene reaction was more uniform and tough than that of pure acrylate radical polymerization, further enhancing the cracking resistance. The result of comparative example 1 is poor, mainly because of the lack of thiol initiator in the formulation of comparative example 1, the brittleness of the cured network is large and the flexibility is poor. The result of comparative example 3 is poor, mainly because the formulation of comparative example 3 has too high a content of polyfunctional resin, resulting in a crosslinked network that is too stiff and lacks the necessary segment movement capability and is therefore very brittle at bending or impact.

From the above analysis, the elastic bending UV excimer skin-feel color-changing paint prepared in examples 1-5 can reach or far exceed the reference technical indexes on the key performances such as adhesive force, hardness, heat resistance, wear resistance, liquid resistance, yellowing resistance, flexibility and the like, and shows comprehensive and excellent comprehensive performances. Comparative examples 1-3, however, further demonstrate the necessity and superiority of the formulations and processes of the present invention in that they exhibit significant deficiencies in one or more properties due to the lack of thiol initiator or tinting base B in their formulations or the inadequacies in process parameters.

The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the invention in any way, and it is apparent to those of ordinary skill in the art that the invention may be practiced without resorting to the details, or with the details, of the invention, or with the equivalents of the various modifications and alterations of the invention, which fall within the scope of the invention.

Claims

1. The elastic bending UV excimer skin-feel color-mixing paint is characterized by comprising a color-mixing base material A, wherein the color-mixing base material A comprises the following components in percentage by weight:

15-60% of functional acrylic resin

5-10% Of multifunctional polyurethane acrylate resin

20-50% Of polyurethane acrylic resin

0.1 To 1 percent of leveling agent

0.1 To 1 percent of defoaming agent

Organosilicon handfeel auxiliary agent 0.1-2%

0.1 To 3 percent of photoinitiator A

0.3 To 3 percent of photoinitiator B

Wetting dispersant 0.3-1%

UV anti-settling slurry 2-5%

Photoinitiator C2-8%

Vinyl ether monomer 5-20%

0.5-3% Of mercaptan initiator.

2. The elastic bending UV excimer skin-feel color-changing paint of claim 1, wherein the functional acrylic ester is M151 resin of Kai flat market color chemical Co., ltd.

3. The elastic bending UV excimer skin-feel color-changing paint of claim 1, wherein the multifunctional polyurethane acrylate resin is nine-functional aliphatic polyurethane acrylate.

4. The elastic bending UV excimer skin-friendly color-changing paint of claim 1, wherein the polyurethane acrylate resin is ZC6482 resin of Kai flat market color chemical Co., ltd.

5. The elastic bending UV excimer skin-feel color-changing paint of claim 1, wherein the photoinitiator A is phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, the photoinitiator B is (2, 4, 6-trimethylbenzoyl) bis (p-tolyl) phosphine oxide, and the photoinitiator C is methyl benzoate.

6. The elastic bending UV excimer skin-friendly color-changing paint of claim 1, wherein the wetting dispersant is AIOX-UV3031 super-dispersant of novel Hunan Eddie special material, and the UV anti-settling slurry is hydrophobic fumed silica slurry.

7. The elastic bending UV excimer skin-feel color-changing paint of claim 1, wherein the vinyl ether monomer is trivinyl ethylene glycol divinyl ether, and the thiol initiator is 2-ethyl-2- (((3-mercaptobutyryl) oxy) methyl) propane-1, 3-diylbis (3-mercaptobutyrate).

8. The elastic bending UV excimer skin-feel color-changing paint of claim 1, further comprising a color-changing base material B, wherein the color-changing base material B comprises the following components in percentage by weight:

100% of aliphatic polyurethane acrylate resin.

9. The elastic bending UV-excimer skin-feel color-changing paint of claim 8, wherein the aliphatic urethane acrylate resin is provided with a Pasteur LR 9000 resin.

10. The application of the elastic bending UV excimer skin-feel color-changing paint is characterized in that the application of the elastic bending UV excimer skin-feel color-changing paint in any one of the claims 1 to 9 comprises the following steps:

Step one, loading the homochromatic melamine plate to a production line;

Step four, coating a UV adhesive force primer on the basis of the step three, wherein the coating weight is 8-10g/m ²;

step five, adopting two mercury lamps to carry out ultraviolet curing on the basis of the step four so as to semi-cure the paint;

Step six, rolling the color-adjusting base material A of the color-adjusting elastic bending UV excimer skin-feel color-adjusting paint and the matched color-adjusting base material B on the basis of the step five, mixing the color-adjusting base material A and the color-adjusting base material B before rolling according to the proportion of 10:1-2, manually and uniformly stirring, wherein the coating amount is 10-30g/m ² during rolling;

Step seven, pre-curing the paint by using a gallium lamp on the basis of the step six to form microgel in the paint liquid;

step eight, performing excimer curing on the basis of the microgel obtained in the step seven;

step nine, curing the molecular film by adopting four iron lamps on the basis of the step eight to fully cure the paint, wherein the main peak wavelength output by the iron lamps is 358-404 nanometers, and the temperature of the plate surface is 60-70 ℃;

And eleventh, protecting and taking off the plate processed in the tenth step by sticking a protective film, and simultaneously immediately laminating, stacking and stacking the plates when taking off the wire, so that the plate surface temperature is recovered to the normal temperature for 4-6 hours.