LED dual-curing coating material and preparation method thereof

Abstract

The invention relates to the field of coatings, and particularly discloses an LED (light-emitting diode) dual-curing coating material which is prepared from the following raw materials: 50-70 parts of PE (polyethylene) resin, 2-5 parts of inorganic filler, 10-20 parts of reactive diluent, 0.05-0.2 part of defoaming agent, 0.05-0.3 part of flatting agent, 3-5 parts of photoinitiator, 0.1-0.5 part of dispersing agent, 5-10 parts of organic solvent and 0.1-0.5 part of anti-settling aid. The coating material disclosed by the invention is high in production efficiency, lower in construction and drying odor, low in harmful substance release, long in product activation period, high in hardness and toughness, low in shrinkage rate, high in fullness and high in filling property, is an ideal substitute of a PE musical instrument coating material, and is great in market potential.

Description

Technical Field

[0001] The invention relates to the field of coatings, in particular to an LED dual-curing coating material and a preparation method thereof. Background Art

[0002] With the development of furniture and musical instrument manufacturing industries, the requirements for coating materials are also increasing. PE (polyester) furniture coating and UV (LED ultraviolet curing) paint are two commonly used furniture coatings, each with different advantages and limitations.

[0003] Advantages of PE coating: PE paint performs well in furniture surface protection due to its high hardness and wear resistance. It provides a variety of colors and glossiness to meet different design requirements. Compared with other high-performance coatings, PE paint has a lower cost. Disadvantages of PE coating materials: large environmental pollution. PE paint may release harmful substances during production and use, causing pollution to the environment. It takes a long time to dry. Traditional PE paint takes a long time to completely dry, affecting production efficiency. The activation period is short, usually about 20 minutes. LED coating, also known as ultraviolet curing coating, is a cold light source coating material that is quickly cured by ultraviolet radiation. It combines the advantages of modern technology and traditional coatings. It has the characteristics of rapid curing and can be cured within a few seconds under ultraviolet radiation, which greatly improves production efficiency. No harmful substances are produced during UV curing, which is environmentally friendly. It has excellent physical properties with high hardness, wear resistance and chemical resistance, provides good surface protection, and has a long activation period.

[0004] The present invention aims to provide an LED dual-curing coating material, which combines the advantages of UV coating materials and PE coating materials, and further forms a new curing method, LED curing + PE curing. The coating material has high production efficiency, lower construction and drying odor, low release of harmful substances, and a long product activation period. It has high hardness and toughness, low shrinkage, high fullness, and high filling. It is an ideal substitute for PE musical instrument coating materials and has huge market potential. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an LED dual-curing coating material and a preparation method thereof, so as to at least achieve the effects of a long product activation period, high hardness and toughness, low shrinkage, high fullness, and high filling.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] An LED dual-curing coating material is prepared from the following raw materials: PE resin, inorganic filler, active diluent, defoamer, leveling agent, dispersant, organic solvent, and anti-settling aid.

[0008] Furthermore, the raw materials include, by weight: 50-70 parts of PE resin, 2-5 parts of inorganic filler, 10-20 parts of active diluent, 0.05-0.2 parts of defoaming agent, 0.05-0.3 parts of leveling agent, 3-5 parts of photoinitiator, 0.1-0.5 parts of dispersant, 5-10 parts of organic solvent, and 0.1-0.5 parts of anti-settling aid.

[0009] Furthermore, the PE resin is an unsaturated polyester resin;

[0010] Preferably, the unsaturated polyester resin includes propylene ether unsaturated polyester resin ETERSET2306 (Changxing Chemical), ETERSET2307 (Changxing Chemical), ETERSET2321 (Changxing Chemical) or propylene ether unsaturated polyester resin 8308 (Fangxin Resin).

[0011] Furthermore, the reactive diluent includes at least one of trimethylolpropylene triacrylate and pentaerythritol triacrylate.

[0012] Preferably, the trimethylolpropylene triacrylate is EM231 (Changxing Chemical); the pentaerythritol triacrylate is EM235 (Changxing Chemical) or EM235-1 (Changxing Chemical).

[0013] Furthermore, the defoaming agent includes at least one of polymethylalkylsiloxane and a foam-breaking polymer that does not contain silicone.

[0014] Preferably, the silicone-free foam-breaking polymer is at least one of BYK051, BYK052, BYK053 and BYK055.

[0015] Furthermore, the leveling agent includes at least one of polyacrylate and fluorocarbon modified polymer.

[0016] Preferably, the polyacrylate is BYK358N, and the fluorocarbon modified polymer is EFKA-3777.

[0017] Furthermore, the photoinitiator includes at least one of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide and 2,4,6-trimethylbenzoyl-di(p-tolyl)phosphine oxide.

[0018] Furthermore, the dispersant includes at least one of a low molecular weight unsaturated polycarboxylic acid polymer and a copolymer containing an acidic group.

[0019] Preferably, the low molecular weight unsaturated polycarboxylic acid polymer is BYK-P104 (BYK); and the copolymer containing acidic groups is BYK-110 (BYK).

[0020] Furthermore, the anti-settling aid includes at least one of fumed silica and polyamide wax.

[0021] Preferably, the fumed silica is A200 (Degussa); the polyamide wax is 229 (Deqian).

[0022] Furthermore, the organic solvent includes at least one of ethyl acetate and butyl acetate.

[0023] Furthermore, the inorganic filler includes at least one of talc and zinc stearate.

[0024] The present invention also provides a method for preparing the LED dual-curing coating material, comprising the following steps: mixing the PE resin, active diluent and photoinitiator, dispersing at a low speed, then adding the dispersant, leveling agent and defoaming agent, continuing to disperse at a low speed, then adding the anti-settling aid and inorganic filler, dispersing the obtained mixture at a high speed to a fineness of ≤50μm, adding the organic solvent, filtering, and obtaining the LED dual-curing coating material.

[0025] The beneficial effects of the present invention are:

[0026] 1. The coating material of the present invention has high production efficiency, lower odor during construction and drying, low release of harmful substances, and a long product activation period. It has high hardness and toughness, low shrinkage, high fullness, and high filling properties. It is an ideal substitute for PE musical instrument coating materials and has huge market potential.

[0027] 2. The present invention adopts propylene ether unsaturated polyester with multifunctional active diluent to solve the problems of fast curing and low shrinkage of LED. It also solves the problems that PE paint releases a lot of harmful substances during use and drying, has a long drying time, and traditional PE paint takes a long time to completely dry, has low production efficiency, and has a short activation period, usually 20 minutes of carbonization. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below, but the protection scope of the present invention is not limited to the following.

[0029] Some of the raw material models used in the following examples are as follows:

[0030] Unsaturated polyester (propylene ether): FX-8308

[0031] Unsaturated polyester (bicyclic): ETERSET2321

[0032] Modified epoxy acrylate: Hengguang 6100D-85

[0033] Modified polyester acrylate: Changxing DR-E630

[0034] Examples 1-3

[0035] Prepare the coating material according to the raw material ratios in Table 1:

[0036] Table 1

[0037]

[0038] Preparation method: Disperse PE resin, active diluent and photoinitiator in sequence at a low speed of 300-500 rpm for 5-10 minutes, disperse the dispersant, leveling agent and defoamer at 300-500 rpm for 5-10 minutes, add anti-settling aid and inorganic filler and disperse at 1000-1200 rpm for 25-30 minutes until the fineness is ≤50 microns, then add organic solvent and filter to obtain LED dual-curing coating material.

[0039] Comparative Example 1-2

[0040] Prepare the coating materials according to the raw material ratios in Table 2:

[0041] Table 2

[0042]

[0043] The preparation method is the same as that of Example 1-3. The difference between Comparative Example 1-2 and Example 1-3 is that the PE resin is replaced by UV resin and the dosage of other components is adjusted.

[0044] Experimental example

[0045] The coating materials prepared in Examples 1-3 and Comparative Examples 1-2 were tested for performance, and the test results are shown in Table 3:

[0046] Table 3

[0047]

[0048] As shown in Table 3, the combination of propylene ether unsaturated polyester and multifunctional active diluent solves the problems of fast LED curing and low shrinkage. It also solves the problems of PE paint releasing more harmful substances during use and drying, long drying time, traditional PE paint takes a long time to completely dry, low production efficiency, short activation period, usually 20 minutes of carbonization, etc.

[0049] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. An LED dual-curing coating material, characterized in that: The invention is prepared by using the following raw materials: PE resin inorganic filler, active diluent, defoamer, leveling agent, dispersant, organic solvent and anti-settling aid.

2. The LED dual-curing coating material according to claim 1, characterized in that: In parts by weight, the raw materials include: 50-70 parts of PE resin, 2-5 parts of inorganic filler, 10-20 parts of active diluent, 0.05-0.2 parts of defoamer, 0.05-0.3 parts of leveling agent, 3-5 parts of photoinitiator, 0.1-0.5 parts of dispersant, 5-10 parts of organic solvent, and 0.1-0.5 parts of anti-settling aid.

3. The LED dual-curing coating material according to claim 1, characterized in that: The reactive diluent includes at least one of trimethylolpropylene triacrylate and pentaerythritol triacrylate.

4. The LED dual-curing coating material according to claim 1, characterized in that: The defoaming agent includes at least one of polymethylalkylsiloxane and a foam-breaking polymer containing no silicone.

5. The LED dual-curing coating material according to claim 1, characterized in that: The leveling agent comprises at least one of a polyacrylate solution and a fluorocarbon modified polymer.

6. The LED dual-curing coating material according to claim 1, characterized in that: The photoinitiator includes at least one of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide and 2,4,6-trimethylbenzoyl-di(p-tolyl)phosphine oxide.

7. The LED dual-curing coating material according to claim 1, characterized in that: The dispersant includes at least one of a low molecular weight unsaturated polycarboxylic acid polymer and an acid group-containing copolymer.

8. The LED dual-curing coating material according to claim 1, characterized in that: The anti-settling aid includes at least one of fumed silica and polyamide wax.

9. The LED dual-curing coating material according to claim 1, characterized in that: The organic solvent includes at least one of ethyl acetate and butyl acetate.

10. The method for preparing the LED dual-curing coating material according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing the PE resin, the active diluent and the photoinitiator, dispersing at a low speed, then adding the dispersant, the leveling agent and the defoamer, continuing to disperse at a low speed, then adding the anti-settling aid and the inorganic filler, dispersing at a high speed until the fineness of the obtained mixture is ≤50 μm, adding the organic solvent, filtering, and obtaining the LED dual-curing coating material.

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