CN111117469A - Solvent-free UV spraying white finish and preparation method thereof - Google Patents
Solvent-free UV spraying white finish and preparation method thereof Download PDFInfo
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- CN111117469A CN111117469A CN201911301738.0A CN201911301738A CN111117469A CN 111117469 A CN111117469 A CN 111117469A CN 201911301738 A CN201911301738 A CN 201911301738A CN 111117469 A CN111117469 A CN 111117469A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention relates to the field of coatings, and discloses a solvent-free UV spraying white finish, which comprises 8-15 parts by weight of ultraviolet curing resin, 3-8 parts by weight of urethane acrylate oligomer, 4-10 parts by weight of polyurethane acrylic resin, 20-35 parts by weight of acrylic polyurethane, 20-40 parts by weight of functional monomer, 12-24 parts by weight of pigment, 2.5-5.2 parts by weight of photoinitiator, 0.5-1 part by weight of dispersant, 0.1-0.5 part by weight of defoaming agent and 0.1-0.5 part by weight of crosslinkable leveling agent; the invention also discloses a preparation method of the UV spraying white finish; according to the invention, the self-reaction UV prepolymer and the high-functionality UV resin are introduced to ensure the overall reaction activity, improve the construction compatibility and reduce the odor; meanwhile, through the matching of other various resins and reactive diluents, the high reactivity is maintained, the overall shrinkage is reduced, certain flexibility is maintained, and the effect of avoiding later-stage cracking is achieved.
Description
Technical Field
The invention relates to the field of coatings, in particular to a solvent-free UV spraying white finish and a preparation method thereof.
Background
Ultraviolet light curing (UV curing) paint is environment-friendly and energy-saving paint developed in the 60 s of the 20 th century, China began to involve the technical field in the 70 s, and the paint has been developed for a long time after the 90 s. The ultraviolet curing coating can be cured quickly under the irradiation of ultraviolet light, not only has high curing speed, but also can save energy compared with the thermal curing coating. In recent years, with the national investment in environmental protection and some mandatory policies, the applications of environmental protection coatings such as high-solid UV coatings and low-VOC aqueous coatings are increasing. At present, the composite material is not only widely applied to wood, metal, plastic, paper and leather, but also successfully applied to materials such as optical fibers, printed circuit boards, electronic component packaging and the like.
However, the conventional uv curable coating has the following disadvantages:
1. the coating has poor hardness, is not friction-resistant and is easy to scratch;
2. in order to meet the construction requirements, a large amount of reactive diluent is required to be added into the solvent-free UV spraying white finish on the market;
3. deep curing is difficult due to the strong reflection of white light;
4. factors such as fluctuation of paint film thickness, curing degree of matched primer, light curing energy and the like easily cause adverse effects such as poor adhesion, poor paint film surface effect and the like.
Chinese patent document CN201610050591.2, application date 20160413, entitled: an anti-fouling UV curing resin coating for LCD display screens discloses a UV curing resin coating, which comprises an ultraviolet curing resin, a solvent, a photoinitiator, polytetrafluoroethylene wax modified white carbon black, an antistatic auxiliary agent, a defoaming agent and a flatting agent; the ultraviolet curing resin comprises high-functionality polyurethane acrylic resin, medium-functionality polyurethane acrylic resin and organic silicon modified acrylate resin; the solvent adopts a mixed solution of toluene and propylene glycol methyl ether; the photoinitiator adopts 1-hydroxycyclohexyl phenyl ketone.
The above patent documents preferably improve the hardness of the coating formed by the UV curable resin coating by optimizing the blending ratio of the UV curable resin, and optimize the blending ratio of each component, so that the coating formed after UV curing has strong scratch resistance, high hardness and good wear resistance. However, no solvent-free UV spray white top coat paint has been proposed which can reduce the overall shrinkage and odor while maintaining high reactivity and flexibility and has excellent scratch resistance.
Therefore, a need exists for a solvent-free UV spray white finish that reduces overall shrinkage and odor while maintaining high reactivity and flexibility, and that is excellent in scratch resistance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a solvent-free UV spraying white finish paint, so that the effects of reducing the whole contractibility and smell and having excellent scratch resistance effect are achieved while high reaction activity and flexibility are maintained.
The purpose of the invention is realized by the following technical scheme: the solvent-free UV spraying white finish comprises, by weight, 8-15 parts of ultraviolet curing resin, 3-8 parts of urethane acrylate oligomer, 4-10 parts of polyurethane acrylic resin, 20-35 parts of acrylic polyurethane, 20-40 parts of functional monomer, 12-24 parts of pigment, 2.5-5.2 parts of photoinitiator, 0.5-1 part of dispersant, 0.1-0.5 part of defoamer and 0.1-0.5 part of crosslinkable leveling agent.
By adopting the technical scheme, the ultraviolet curing resin and the high-functionality UV resin are introduced, so that the effects of improving construction compatibility and reducing odor are achieved while the integral reaction activity is ensured; meanwhile, the proportion of various resins and reactive diluents is limited, so that the high reactivity is maintained, the overall shrinkage is reduced, the flexibility is maintained, and the cracking phenomenon in the later period is avoided.
Further, the urethane acrylate oligomer includes a ten-functional aliphatic urethane acrylate oligomer.
Further, the urethane acrylic resin includes an aliphatic urethane acrylic resin.
Further, the acrylic urethane includes difunctional aliphatic acrylic urethane.
Further, the functional monomer includes isobornyl acrylate, 1, 6-hexanediol diacrylate, and dipropylene glycol diacrylate.
Further, the weight ratio of the isobornyl acrylate to the 1, 6-hexanediol diacrylate to the dipropylene glycol diacrylate is 1-2: 2-4.
Further, the pigment comprises titanium dioxide.
Further, the photoinitiator includes phenylbis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-propanone.
Further, the weight ratio of the phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide to the 2-hydroxy-2-methyl-1-phenyl-1-acetone is 0.5-1.2: 2-4.
A preparation method of solvent-free UV spraying white finish paint comprises the steps of sequentially adding the ultraviolet curing resin, the urethane acrylate oligomer, the polyurethane acrylic resin, the acrylic polyurethane, the functional monomer, the pigment, the photoinitiator, the dispersing agent, the defoaming agent and the crosslinkable leveling agent, and uniformly mixing and stirring to obtain the solvent-free UV spraying white finish paint.
The invention has the beneficial effects that:
1. according to the solvent-free UV spraying white finish, the effects of improving construction compatibility and reducing odor while ensuring the whole reaction activity are achieved by introducing the ultraviolet curing resin and the high-functionality UV resin.
2. According to the solvent-free UV spraying white finish, the high reactivity is maintained, the overall shrinkage is reduced, the flexibility is maintained, and the cracking phenomenon in the later period is avoided.
3. The solvent-free UV spraying white finish disclosed by the invention is green and environment-friendly with 100% solid content, has good balance between adhesive force and covering power, and has the advantages of low smell, good leveling property of the surface of a paint film, strong mirror effect, high gloss, excellent scratch resistance effect and the like.
Detailed Description
The technical solutions of the present invention are described in further detail below, but the scope of the present invention is not limited to the following.
In the following examples, the UV curable resin is a double bond chemical Co., Ltd
9300 the ten-functional group aliphatic urethane acrylate oligomer is available from double bond chemical Co., Ltd
588, aliphatic polyurethane acrylic resin is double bond chemical Co., Ltd
554, the difunctional aliphatic acrylic polyurethane is GENOMER 4247 of RahnAG chemistry, the functional monomer is purchased from Tianjin Tianjiao chemistry, the titanium dioxide is R-706 of DuPont chemistry, the photoinitiator is purchased from double bond chemical industry Co., Ltd, the dispersant is BYK-1790 of BYK chemistry, the antifoaming agent is DISPERBYK-2055 of BYK chemistry, and the crosslinkable leveling agent is Rad 2500 of TEGO chemistry.
Example 1
1. A solvent-free UV spraying white finish comprises, by weight, 8 parts of ultraviolet curing resin, 4.8 parts of ten-functional-group aliphatic urethane acrylate oligomer, 5 parts of aliphatic polyurethane acrylic resin, 35 parts of difunctional aliphatic acrylic polyurethane, 30 parts of functional monomer, 13 parts of titanium dioxide, 3.3 parts of photoinitiator, 0.5 part of dispersant, 0.2 part of defoaming agent and 0.2 part of cross-linkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate in a weight ratio of 1:1:4, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a weight ratio of 0.8: 2.5.
2. A preparation method of solvent-free UV spraying white finish comprises the following steps:
s1, weighing the raw materials according to a ratio;
s2, sequentially adding ultraviolet curing resin, a ten-functional-group aliphatic urethane acrylate oligomer, aliphatic polyurethane acrylic resin and difunctional aliphatic acrylic polyurethane, adding isobornyl acrylate, and uniformly stirring at a low speed to obtain an intermediate product A;
s3, sequentially adding phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide, a dispersing agent and a defoaming agent into the intermediate product A, and dispersing at a high speed for 5min to obtain an intermediate product B;
s4, slowly adding titanium dioxide into the intermediate product B under a low-speed stirring state, and dispersing at a high speed for 20min until the fineness is less than or equal to 25 mu m to obtain an intermediate product C;
and S5, sequentially adding 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, a cross-linkable leveling agent and 2-hydroxy-2-methyl-1-phenyl-1-acetone into the intermediate product C under a low-speed stirring state, and uniformly stirring at a medium speed to obtain a white viscous liquid (the white finish obtained in the embodiment has good tolerance, the wet film thickness of 200 microns does not lose adhesive force, the covering power is moderate, the surface mirror effect is good, and the fullness is excellent).
Example 2
1. A solvent-free UV spraying white finish comprises, by weight, 10 parts of ultraviolet curing resin, 6.5 parts of ten-functional-group aliphatic urethane acrylate oligomer, 5 parts of aliphatic polyurethane acrylic resin, 27.3 parts of difunctional aliphatic acrylic polyurethane, 26 parts of functional monomer, 20 parts of titanium dioxide, 4 parts of photoinitiator, 0.8 part of dispersant, 0.2 part of defoaming agent and 0.2 part of cross-linkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate in a weight ratio of 3:5:5, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a weight ratio of 1: 3.
2. A preparation method of solvent-free UV spraying white finish comprises the following steps:
s1, weighing the raw materials according to a ratio;
s2, sequentially adding ultraviolet curing resin, a ten-functional-group aliphatic urethane acrylate oligomer, aliphatic polyurethane acrylic resin and difunctional aliphatic acrylic polyurethane, adding isobornyl acrylate, and uniformly stirring at a low speed to obtain an intermediate product A;
s3, sequentially adding phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide, a dispersing agent and a defoaming agent into the intermediate product A, and dispersing at a high speed for 5min to obtain an intermediate product B;
s4, slowly adding titanium dioxide into the intermediate product B under a low-speed stirring state, and dispersing at a high speed for 20min until the fineness is less than or equal to 25 mu m to obtain an intermediate product C;
s5, under the low-speed stirring state, sequentially adding 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, a cross-linkable leveling agent and 2-hydroxy-2-methyl-1-phenyl-1-acetone into the intermediate product C, and uniformly stirring at a medium speed to obtain a white viscous liquid (compared with the example 1, the white finish obtained in the embodiment has the advantages that the covering power is increased, the dryness and the adhesive force of the paint film are well balanced, the adhesive force of the wet film is not lost even when the wet film is 150 mu m, the surface mirror effect is good, and the fullness is excellent).
Example 3
1. A solvent-free UV spraying white finish comprises, by weight, 15 parts of ultraviolet curing resin, 8 parts of ten-functional group aliphatic urethane acrylate oligomer, 6.5 parts of aliphatic polyurethane acrylic resin, 24.3 parts of difunctional aliphatic acrylic polyurethane, 23.1 parts of functional monomer, 18 parts of titanium dioxide, 3.9 parts of photoinitiator, 0.7 part of dispersant, 0.3 part of defoamer and 0.5 part of crosslinkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate in a weight ratio of 7:8:8.1, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a weight ratio of 0.3: 1.
2. A preparation method of solvent-free UV spraying white finish comprises the following steps:
s1, weighing the raw materials according to a ratio;
s2, sequentially adding ultraviolet curing resin, a ten-functional-group aliphatic urethane acrylate oligomer, aliphatic polyurethane acrylic resin and difunctional aliphatic acrylic polyurethane, adding isobornyl acrylate, and uniformly stirring at a low speed to obtain an intermediate product A;
s3, sequentially adding phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide, a dispersing agent and a defoaming agent into the intermediate product A, and dispersing at a high speed for 5min to obtain an intermediate product B;
s4, slowly adding titanium dioxide into the intermediate product B under a low-speed stirring state, and dispersing at a high speed for 20min until the fineness is less than or equal to 25 mu m to obtain an intermediate product C;
and S5, sequentially adding 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, a cross-linkable leveling agent and 2-hydroxy-2-methyl-1-phenyl-1-acetone into the intermediate product C under a low-speed stirring state, and uniformly stirring at a medium speed to obtain a white viscous liquid (compared with the examples 1 and 2, the obtained white finish has the advantages of strengthened curing energy, weakened smell, strengthened flexibility, adhesive force and surface scratch resistance, improved construction latitude, good surface mirror effect and excellent fullness).
Example 4
1. A solvent-free UV spraying white finish comprises 8 parts by weight of ultraviolet curing resin, 3 parts by weight of ten-functional group aliphatic urethane acrylate oligomer, 4 parts by weight of aliphatic polyurethane acrylic resin, 20 parts by weight of difunctional aliphatic acrylic polyurethane, 20 parts by weight of functional monomer, 12 parts by weight of titanium dioxide, 2.5 parts by weight of photoinitiator, 0.5 part by weight of dispersant, 0.1 part by weight of defoaming agent and 0.1 part by weight of cross-linkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate in a weight ratio of 1:1:2, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a weight ratio of 1: 4.
2. A preparation method of solvent-free UV spraying white finish comprises the following steps:
s1, weighing the raw materials according to a ratio;
s2, sequentially adding ultraviolet curing resin, a ten-functional-group aliphatic urethane acrylate oligomer, aliphatic polyurethane acrylic resin and difunctional aliphatic acrylic polyurethane, adding isobornyl acrylate, and uniformly stirring at a low speed to obtain an intermediate product A;
s3, sequentially adding phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide, a dispersing agent and a defoaming agent into the intermediate product A, and dispersing at a high speed for 5min to obtain an intermediate product B;
s4, slowly adding titanium dioxide into the intermediate product B under a low-speed stirring state, and dispersing at a high speed for 20min until the fineness is less than or equal to 25 mu m to obtain an intermediate product C;
and S5, sequentially adding 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, a crosslinkable leveling agent and 2-hydroxy-2-methyl-1-phenyl-1-acetone into the intermediate product C under a low-speed stirring state, and uniformly stirring at a medium speed to obtain the composite material.
Example 5
1. A solvent-free UV spraying white finish comprises, by weight, 15 parts of ultraviolet curing resin, 8 parts of a ten-functional group aliphatic urethane acrylate oligomer, 10 parts of aliphatic polyurethane acrylic resin, 35 parts of difunctional aliphatic acrylic polyurethane, 40 parts of a functional monomer, 24 parts of titanium dioxide, 5.2 parts of a photoinitiator, 1 part of a dispersing agent, 0.5 part of a defoaming agent and 0.5 part of a cross-linkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate in a weight ratio of 1:1:2, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a weight ratio of 0.3: 1.
2. A preparation method of solvent-free UV spraying white finish comprises the following steps:
s1, weighing the raw materials according to a ratio;
s2, sequentially adding ultraviolet curing resin, a ten-functional-group aliphatic urethane acrylate oligomer, aliphatic polyurethane acrylic resin and difunctional aliphatic acrylic polyurethane, adding isobornyl acrylate, and uniformly stirring at a low speed to obtain an intermediate product A;
s3, sequentially adding phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide, a dispersing agent and a defoaming agent into the intermediate product A, and dispersing at a high speed for 5min to obtain an intermediate product B;
s4, slowly adding titanium dioxide into the intermediate product B under a low-speed stirring state, and dispersing at a high speed for 20min until the fineness is less than or equal to 25 mu m to obtain an intermediate product C;
and S5, sequentially adding 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, a crosslinkable leveling agent and 2-hydroxy-2-methyl-1-phenyl-1-acetone into the intermediate product C under a low-speed stirring state, and uniformly stirring at a medium speed to obtain the composite material.
Comparative example 1
Comparing the UV spraying white finish paint in the embodiment 2 of the invention with the comparison example 1, wherein the UV spraying white finish paint in the comparison example 1 comprises aliphatic polyurethane acrylic resin, difunctional aliphatic acrylic polyurethane, a functional monomer, titanium dioxide, a photoinitiator, a dispersing agent, a defoaming agent and a cross-linkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-acetone;
other conditions such as the amount of the ultraviolet curable resin and the ten-functional aliphatic urethane acrylate oligomer were the same as those in example 2 of the present invention (the UV spray white paint of the present comparative example did not contain the ultraviolet curable resin and the ten-functional aliphatic urethane acrylate oligomer, and was used to prove that the UV spray white paint of the present invention has better curing energy and paint film properties).
Comparative example 2
Comparing the UV spraying white finish paint in the embodiment 2 of the invention with the comparison example 2, wherein the UV spraying white finish paint in the comparison example 2 comprises a ten-functional-group aliphatic urethane acrylate oligomer, aliphatic polyurethane acrylic resin, difunctional aliphatic acrylic polyurethane, a functional monomer, titanium dioxide, a photoinitiator, a dispersing agent, a defoaming agent and a cross-linkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-acetone;
other conditions such as the amount of the used ultraviolet curing resin, the preparation method and the like are the same as those of the example 2 (the UV spraying white finish paint of the comparative example does not contain the ultraviolet curing resin and is used for proving that the curing energy and the paint film performance of the UV spraying white finish paint of the invention are better).
Comparative example 3
Comparing the UV spraying white finish paint in the embodiment 2 of the invention with a comparison example 3, wherein the UV spraying white finish paint in the comparison example 3 comprises ultraviolet curing resin, aliphatic polyurethane acrylic resin, difunctional aliphatic acrylic polyurethane, a functional monomer, titanium dioxide, a photoinitiator, a dispersing agent, a defoaming agent and a cross-linkable leveling agent; wherein the functional monomer comprises isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate, and the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-acetone;
other conditions such as the amount of use, the method of preparation, etc. were the same as in inventive example 2 (the UV spray white top coat of this comparative example did not contain the decafunctional aliphatic urethane acrylate oligomer to demonstrate better curing energy and paint film properties of the UV spray white top coat of the present invention).
Test effects
In order to verify the performance of the aqueous woodware coating, product performance tests were performed on the UV spray white finishes prepared in examples 1 to 5 and comparative examples 1 to 3, and five aspects of UV photocuring, hardness, adhesion, toughness and cold-hot cycle were evaluated respectively. Wherein, before testing, the corresponding UV substrate is polished to be flat in advance, and oil stains and dust on the surface are removed; during testing, the UV substrate is heated to 45-60 ℃ for spraying, and finally the substrate is heated to be horizontal and placed for 4-5 min. The test results are shown in the following table:
as can be seen from the above table, compared with the comparative examples 1 to 3, the UV spraying white finish prepared in the examples 1 to 5 has significantly improved photocuring, hardness, adhesion, toughness and crack resistance.
Therefore, the solvent-free UV spraying white finish paint can reduce the whole shrinkage and smell while keeping high reaction activity and flexibility, and has excellent scratch resistance.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The solvent-free UV spraying white finish is characterized by comprising 8-15 parts by weight of ultraviolet curing resin, 3-8 parts by weight of urethane acrylate oligomer, 4-10 parts by weight of polyurethane acrylic resin, 20-35 parts by weight of acrylic polyurethane, 20-40 parts by weight of functional monomer, 12-24 parts by weight of pigment, 2.5-5.2 parts by weight of photoinitiator, 0.5-1 part by weight of dispersant, 0.1-0.5 part by weight of defoaming agent and 0.1-0.5 part by weight of cross-linkable leveling agent.
2. The solventless UV spray white finish of claim 1 wherein the urethane acrylate oligomer comprises a ten functional aliphatic urethane acrylate oligomer.
3. The solventless UV spray white finish of claim 1 wherein the polyurethane acrylic comprises an aliphatic polyurethane acrylic.
4. The solventless UV spray white finish of claim 1 wherein the acrylic polyurethane comprises a difunctional aliphatic acrylic polyurethane.
5. The solventless UV spray white top coat according to claim 1 wherein the functional monomers comprise isobornyl acrylate, 1, 6-hexanediol diacrylate, and dipropylene glycol diacrylate.
6. The solvent-free UV spray white finish according to claim 5, characterized in that the weight ratio of isobornyl acrylate, 1, 6-hexanediol diacrylate and dipropylene glycol diacrylate is 1-2: 2-4.
7. The solventless UV spray white paint of claim 1 wherein the pigment comprises titanium dioxide.
8. The solventless UV spray white top coat according to claim 1 wherein the photoinitiator comprises phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide and 2-hydroxy-2-methyl-1-phenyl-1-propanone.
9. The solventless UV spray white paint according to claim 8, wherein the weight ratio of the phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide to the 2-hydroxy-2-methyl-1-phenyl-1-propanone is 0.5-1.2: 2-4.
10. The method for preparing the UV spraying white finish paint as claimed in any one of claims 1 to 9, characterized by sequentially adding the ultraviolet light curing resin, the urethane acrylate oligomer, the polyurethane acrylic resin, the acrylic polyurethane, the functional monomer, the pigment, the photoinitiator, the dispersant, the defoamer and the cross-linkable leveling agent according to the mixture ratio, and uniformly mixing and stirring to obtain the UV spraying white finish paint.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114456701A (en) * | 2021-12-22 | 2022-05-10 | 成都展辰涂料有限公司 | Spray-coating bright UV coating material and preparation method thereof |
| CN115322690A (en) * | 2022-09-20 | 2022-11-11 | 深圳市金泰科环保线缆有限公司 | TPU glue for drag chain binding line, drag chain binding line and manufacturing method thereof |
| CN115558403A (en) * | 2022-09-19 | 2023-01-03 | 广东希贵光固化材料有限公司 | Ultraviolet photocureable coating for stainless steel condenser tube |
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| CN1796478A (en) * | 2004-12-20 | 2006-07-05 | 比亚迪股份有限公司 | Coating material solidified by ultraviolet light and prepartion method |
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