Water-based UV (ultraviolet) excimer skin-touch coating with negative ion effect and preparation method thereof

Abstract

The invention relates to the technical field of coatings, and particularly discloses a water-based UV excimer skin-touch coating with a negative ion effect and a preparation method of the water-based UV excimer skin-touch coating. The water-based UV excimer skin-touch coating is prepared from the following raw materials: water-based polyurethane acrylate, aliphatic modified polyurethane acrylate, nanoscale silicon dioxide, negative ion composite powder, a photoinitiator, a dispersing agent, a defoaming agent, a flatting agent and water. The coating is a full-water-based environment-friendly system and is excellent in environment-friendly performance, the VOC content is smaller than or equal to 25 g / L, the super-matte skin feeling can be efficiently kept through molecular design and process optimization by applying water-based polyurethane acrylate to be matched with nanoscale silicon dioxide, the stain resistance is excellent, and a coating film is good in wear resistance and scratch resistance; the effect of lasting release of negative ions can be achieved with the assistance of negative ion composite powder, and the initial release amount of the negative ions is larger than or equal to 3000 / cm < 3 >.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to a water-based UV excimer skin-feel coating with a negative ion effect and a preparation method thereof. Background Art

[0002] In recent years, with the upgrading of consumption, high-end customized home furnishings, automotive interiors, consumer electronics and other fields have put forward dual requirements for the "texture experience" and "health and environmental protection" of materials.

[0003] Currently, traditional UV excimer skin-feel coatings on the market contain monomers that release irritating odors during use, posing a health risk. These coatings struggle to balance health benefits with a superior skin feel, failing to meet the stringent dual demands for both "texture" and "health and environmental protection" in high-value-added sectors such as high-end custom home furnishings, automotive interiors, and consumer electronics. While some water-based skin-feel coatings can alleviate health issues during construction to some extent, they still fall short in achieving the desired skin-feel effect. Furthermore, their poor long-term stability and incompatibility with other materials and processes limit their application in high-value-added markets.

[0004] In response to the above-mentioned technical pain points, the present invention provides a water-based UV excimer skin-feel coating with a negative ion effect and a preparation method thereof. The prepared coating has the characteristics of "environmentally friendly low VOC + long-lasting skin feel + efficient negative ion release", and breaks through the environmental limitations of traditional solvent-based products and the functional bottlenecks of water-based products. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a water-based UV excimer skin-feel coating with a negative ion effect and a preparation method thereof. The prepared coating has the characteristics of "environmentally friendly low VOC + long-lasting skin feel + efficient negative ion release", and breaks through the environmental limitations of traditional solvent-based products and the functional bottlenecks of water-based products.

[0006] A first aspect of the present invention provides a water-based UV excimer skin-feel coating with a negative ion effect.

[0007] Specifically, the water-based UV excimer skin-feel coating with negative ion effect, the raw materials of the water-based UV excimer skin-feel coating include water-based polyurethane acrylate, aliphatic modified polyurethane acrylate, nano-scale silica, negative ion composite powder, photoinitiator, dispersant, defoaming agent, leveling agent and water.

[0008] Preferably, the raw materials of the water-based UV excimer skin-feel coating include, by weight, 25 to 35 parts of water-based polyurethane acrylate, 15 to 20 parts of aliphatic modified polyurethane acrylate, 3 to 5 parts of nano-silica, 10 to 20 parts of negative ion composite powder, 2 to 3 parts of photoinitiator, 0.5 to 1 part of dispersant, 0.1 to 0.5 part of defoaming agent, 0.1 to 0.5 part of leveling agent and 25 to 35 parts of water.

[0009] Further preferably, the raw materials of the water-based UV excimer skin-feel coating include, by weight, 25-35 parts of water-based polyurethane acrylate, 15-20 parts of aliphatic modified polyurethane acrylate, 3-5 parts of nano-silica, 10-18 parts of negative ion composite powder, 2-3 parts of photoinitiator, 0.5-1 part of dispersant, 0.1-0.5 part of defoaming agent, 0.1-0.5 part of leveling agent and 25-35 parts of water.

[0010] More preferably, the raw materials of the water-based UV excimer skin-feel coating include, by weight, 25-35 parts of water-based polyurethane acrylate, 15-20 parts of aliphatic modified polyurethane acrylate, 3-5 parts of nano-silica, 10-15 parts of negative ion composite powder, 2-3 parts of photoinitiator, 0.5-1 part of dispersant, 0.1-0.5 part of defoaming agent, 0.1-0.5 part of leveling agent and 25-35 parts of water.

[0011] Preferably, the particle size of the nano-scale silicon dioxide is 1 to 500 nm.

[0012] More preferably, the particle size of the nano-scale silicon dioxide is 1 to 100 nm.

[0013] More preferably, the particle size of the nano-scale silicon dioxide is 10 to 100 nm.

[0014] Preferably, the waterborne polyurethane acrylate includes waterborne polyurethane acrylate of model BASF UA 8983Aqua, and the waterborne polyurethane acrylate is the main resin.

[0015] Preferably, the aliphatic modified polyurethane acrylate includes aliphatic modified polyurethane acrylate with the model number of Covestro UC-177. The aliphatic modified polyurethane acrylate is an auxiliary resin and can be chemically bonded with the negative ion composite powder.

[0016] Preferably, the photoinitiator includes TPO and photoinitiator 1173, and the photoinitiator can initiate efficient polymerization of resin and monomer under the irradiation conditions of LED 395nm, excimer 172nm and mercury lamp.

[0017] Preferably, the dispersant includes a dispersant of BYK-190 manufactured by BYK Chemicals, which can prevent the coating from agglomerating and make it uniformly dispersed.

[0018] Preferably, the defoaming agent includes a defoaming agent of model number Defom 535, which can reduce bubbles in the coating.

[0019] Preferably, the leveling agent includes a leveling agent of model BASF EFKA-3777, which can increase wettability and coating leveling and improve scratch resistance.

[0020] Preferably, the nano-silica includes nano-silica of model Aerosil 200 and Haiborui HBS-20, which can enhance the delicateness of the skin and have high wear resistance and high permeability.

[0021] Preferably, the negative ion composite powder includes Dow Corning Z-6030 and Huanzheng Chemical HZ-570 negative ion composite powder, which can provide efficient release of negative ions.

[0022] Preferably, the water comprises deionized water, and the viscosity can be adjusted.

[0023] The second aspect of the present invention provides a method for preparing a water-based UV excimer skin-feel coating with a negative ion effect.

[0024] Specifically, the preparation method of the water-based UV excimer skin-feel coating with negative ion effect comprises the following steps:

[0025] First, the dispersant, nano-silica, negative ion composite powder and water are pre-dispersed, and then water-based polyurethane acrylate and aliphatic modified polyurethane acrylate are added for the first mixing. Finally, a defoamer, a leveling agent, a photoinitiator and water are added for the second mixing to prepare a water-based UV excimer skin-feel coating with a negative ion effect.

[0026] Preferably, the pre-dispersion speed is 750-850 rpm.

[0027] More preferably, the pre-dispersion speed is 800-850 rpm.

[0028] More preferably, the pre-dispersion speed is 800 rpm.

[0029] Preferably, the pre-dispersion time is 20 to 40 minutes.

[0030] More preferably, the pre-dispersion time is 25 to 35 minutes.

[0031] More preferably, the pre-dispersion time is 30 minutes.

[0032] Preferably, the rotation speed of the first mixing is 550-650 rpm.

[0033] More preferably, the rotation speed of the first mixing is 600-650 rpm.

[0034] More preferably, the rotation speed of the first mixing is 600 rpm.

[0035] Preferably, the first mixing time is 15 to 30 minutes.

[0036] More preferably, the first mixing time is 20 to 30 minutes.

[0037] More preferably, the first mixing time is 20 minutes.

[0038] Preferably, the second mixing speed is 550-650 rpm.

[0039] More preferably, the second mixing speed is 550-600 rpm.

[0040] More preferably, the second mixing speed is 600 rpm.

[0041] Preferably, the second mixing time is 10 to 20 minutes.

[0042] More preferably, the second mixing time is 15 to 20 minutes.

[0043] More preferably, the second mixing time is 15 minutes.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] This invention is a fully water-based environmentally friendly system with excellent environmental performance and a VOC content of ≤25g / L. It uses water-based polyurethane acrylate with nano-silica through molecular design and process optimization to achieve "super matte skin feel and high efficiency maintenance", and has excellent stain resistance, good coating wear resistance and scratch resistance. The addition of negative ion composite powder can achieve the effect of "long-lasting negative ion release", with an initial negative ion release of ≥3000 / cm 3 . DETAILED DESCRIPTION

[0046] In order to make the technical solution of the present invention more clearly understood by those skilled in the art, the following examples are given for illustration. It should be noted that the following examples do not limit the scope of protection claimed by the present invention.

[0047] Unless otherwise specified, the raw materials, reagents, or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0048] Example 1

[0049] A water-based UV excimer skin-feel coating with negative ion effect and a preparation method thereof.

[0050] Water-based UV excimer skin-feel coating with negative ion effect, calculated by weight, its raw materials are

[0051] 35 parts of waterborne polyurethane acrylate, 20 parts of aliphatic modified polyurethane acrylate, 5 parts of nano-silica, 10 parts of negative ion composite powder, 3 parts of photoinitiator, 1 part of dispersant, 0.5 parts of defoaming agent, 0.5 parts of leveling agent and 35 parts of deionized water.

[0052] The preparation method of water-based UV excimer skin-feel coating comprises the following steps:

[0053] First, 1 part of dispersant, 5 parts of nano-silica, 10 parts of negative ion composite powder and 20 parts of deionized water are pre-dispersed at a pre-dispersion speed of 800 rpm for 30 minutes; then, 35 parts of waterborne polyurethane acrylate and 20 parts of aliphatic modified polyurethane acrylate are added for a first mixing at a speed of 600 rpm for 20 minutes; finally, 0.5 parts of defoamer, 0.5 parts of leveling agent, 3 parts of photoinitiator and 15 parts of deionized water are added for a second mixing at a speed of 600 rpm for 15 minutes to prepare a waterborne UV excimer skin-feel coating with a negative ion effect.

[0054] Example 2

[0055] A water-based UV excimer skin-feel coating with negative ion effect and a preparation method thereof.

[0056] The difference from Example 1 is that the negative ion composite powder in Example 2 is 15 parts, and the types and addition amounts of other raw materials and the steps of the coating preparation method are the same as those in Example 1.

[0057] Comparative Example 1

[0058] A water-based UV excimer skin-feel coating with negative ion effect and a preparation method thereof.

[0059] The difference from Example 1 is that the negative ion composite powder in Comparative Example 1 is 3 parts, and the types and addition amounts of the remaining raw materials and the steps of the coating preparation method are the same as those in Example 1.

[0060] Comparative Example 2

[0061] A water-based UV excimer skin-feel coating with negative ion effect and a preparation method thereof.

[0062] The difference from Example 1 is that the negative ion composite powder in Comparative Example 2 is 6 parts, and the types and addition amounts of the remaining raw materials and the steps of the coating preparation method are the same as those in Example 1.

[0063] Performance testing:

[0064] Table 1 Test results of coatings obtained in various embodiments and comparative examples

[0065]

[0066]

[0067] The present invention is a fully water-based environmentally friendly system with excellent environmental performance. The VOC content is ≤25g / L. The use of water-based polyurethane acrylate combined with nano-silica can achieve "super matte skin feel and high efficiency maintenance" through molecular design and process optimization. It also has excellent stain resistance, good wear resistance and scratch resistance of the coating. The addition of negative ion composite powder can achieve the effect of "long-lasting negative ion release", with an initial negative ion release of ≥3000 / cm 3 .

[0068] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions derived from modifications, equivalent substitutions, improvements, etc. made by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims

1. A water-based UV excimer skin-feel coating with a negative ion effect, characterized in that: The raw materials of the water-based UV excimer skin-feel coating include water-based polyurethane acrylate, aliphatic modified polyurethane acrylate, nano-scale silicon dioxide, negative ion composite powder, photoinitiator, dispersant, defoamer, leveling agent and water.

2. The water-based UV excimer skin-feel coating according to claim 1, characterized in that: The raw materials of the water-based UV excimer skin-feel coating include, by weight, 25 to 35 parts of water-based polyurethane acrylate, 15 to 20 parts of aliphatic modified polyurethane acrylate, 3 to 5 parts of nano-silica, 10 to 20 parts of negative ion composite powder, 2 to 3 parts of photoinitiator, 0.5 to 1 part of dispersant, 0.1 to 0.5 part of defoaming agent, 0.1 to 0.5 part of leveling agent and 25 to 35 parts of water.

3. The water-based UV excimer skin-feel coating according to claim 1, characterized in that: The particle size of the nano-scale silicon dioxide is 1 to 500 nm.

4. The method for preparing the water-based UV excimer skin-feel coating with negative ion effect according to any one of claims 1 to 3, characterized in that: The following steps are involved: First, the dispersant, nano-silica, negative ion composite powder and water are pre-dispersed, and then water-based polyurethane acrylate and aliphatic modified polyurethane acrylate are added for the first mixing. Finally, a defoamer, a leveling agent, a photoinitiator and water are added for the second mixing to prepare a water-based UV excimer skin-feel coating with a negative ion effect.

5. The preparation method according to claim 4, characterized in that The rotation speed of the pre-dispersion is 750-850 rpm.

6. The preparation method according to claim 4, characterized in that The pre-dispersion time is 20 to 40 minutes.

7. The preparation method according to claim 4, characterized in that The rotation speed of the first mixing is 550-650 rpm.

8. The preparation method according to claim 4, characterized in that The first mixing time is 15 to 30 minutes.

9. The preparation method according to claim 4, characterized in that The rotation speed of the second mixing is 550-650 rpm.

10. The preparation method according to claim 4, characterized in that The second mixing time is 10 to 20 minutes.

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