阅读说明：本技术 一种高耐候性反光涂层及其制备方法 (High-weather-resistance reflective coating and preparation method thereof ) 是由 潘彬 于 2020-09-21 设计创作，主要内容包括：本发明提供一种高耐候性反光涂层及其制备方法,涉及反光涂层领域,采用光固化打印得到,包括以下步骤：S1、取有机硅光固化低聚物、聚碳酸酯、热固性树脂、偶联剂和活性稀释剂混合均匀得溶液A；取可聚合抗静电剂和改性石墨烯混合均匀得溶液B；S2、将溶液A和溶液B混合均匀,选取波长为385-400nm的光波为光源,在温度30-45℃下进行光固化打印,最终得到所述高耐候性反光涂层。该方法简单,过程环保无污染,制备得到的反光涂层兼顾耐候性和优异的塑性。该方法能够利用生物质能源连续化制备一氧化硅,生产方法简单,适合大规模生产。(The invention provides a high-weather-resistance reflective coating and a preparation method thereof, relates to the field of reflective coatings, is obtained by photocuring printing, and comprises the following steps: s1, uniformly mixing the organic silicon light-cured oligomer, the polycarbonate, the thermosetting resin, the coupling agent and the reactive diluent to obtain a solution A; uniformly mixing a polymerizable antistatic agent and the modified graphene to obtain a solution B; s2, uniformly mixing the solution A and the solution B, selecting light waves with the wavelength of 385-400nm as a light source, and carrying out photocuring printing at the temperature of 30-45 ℃ to finally obtain the high-weather-resistance reflective coating. The method is simple, the process is environment-friendly and pollution-free, and the prepared reflective coating has both weather resistance and excellent plasticity. The method can continuously prepare the silicon monoxide by using biomass energy, has simple production method and is suitable for large-scale production.)

1. The high-weather-resistance reflective coating is characterized by comprising the following components in parts by weight:

2. the highly weatherable reflective coating according to claim 1, wherein said silicone light-curable oligomer is one or more of silicone epoxy resin, silicone urethane, silicone polymethyl methacrylate; the modified graphene is COP-64 loaded nano graphene.

3. The highly weatherable reflective coating according to claim 2, wherein said modified graphene is prepared by the following steps: mixing COP-64 and the nano-graphene solution, and ultrasonically shaking at 10-15 ℃ for 30-60min, wherein the mass ratio of COP-64 to nano-graphene is 0.001-1.

4. A method for preparing the highly weatherable reflective coating according to claim 3, wherein the method is obtained by photo-curing printing.

5. The method for preparing the highly weatherable reflective coating according to claim 4, comprising the steps of:

s1, uniformly mixing the organic silicon light-cured oligomer, the polycarbonate, the thermosetting resin, the coupling agent and the reactive diluent to obtain a solution A; uniformly mixing a polymerizable antistatic agent and the modified graphene to obtain a solution B;

s2, uniformly mixing the solution A and the solution B, selecting light waves with the wavelength of 385-400nm as a light source, and carrying out photocuring printing at the temperature of 30-45 ℃ to finally obtain the high-weather-resistance reflective coating.

6. The method for preparing a highly weatherable reflective coating according to claim 5, wherein the solution A is mixed at a temperature of 10-20 ℃ and left for 20-40min in step S1.

7. The method for preparing the reflective coating with high weatherability as claimed in claim 5, wherein in step S2, the solution A and the solution B are dried at 10-20 deg.C and 0.08-0.1MPa for 60-80min after being mixed uniformly.

8. The method for preparing a highly weatherable reflective coating according to claim 5, 6 or 7, wherein the highly weatherable reflective coating has a thickness of 0.01 to 2 mm.

Technical Field

The invention relates to the field of reflective coatings, in particular to a high-weather-resistance reflective coating and a preparation method thereof.

Background

The weather-resistant reflective coating used in the field of reflective material production generally requires that its properties meet the following conditions: good light transmittance, good resistance to contusion, no cracking, good weather resistance, no yellowing and the like. The materials in the market are prepared by tape casting or film blowing, the preparation process is complex and trivial, the prepared materials can only ensure weather resistance, cannot give consideration to excellent plasticity, cannot meet higher use requirements, and limit the application effect and range of the reflective coating.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides the high-weather-resistance reflective coating and the preparation method thereof, the method is simple, the process is environment-friendly and pollution-free, and the prepared reflective coating has both weather resistance and excellent plasticity.

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

a high-weather-resistance reflective coating comprises the following components in parts by weight:

preferably, the organic silicon light-cured oligomer is any one or more of organic silicon epoxy resin, organic silicon polyurethane and organic silicon polymethyl methacrylate; the modified graphene is COP-64 loaded nano graphene.

Preferably, the preparation method of the modified graphene is as follows: mixing COP-64 and the nano-graphene solution, and ultrasonically shaking at 10-15 ℃ for 30-60min, wherein the mass ratio of COP-64 to nano-graphene is 0.001-1. COP-64 has fluorescence and strong absorption to ultraviolet light. According to the invention, ultrasonic oscillation is carried out at the temperature of 10-15 ℃, the weight ratio of COP-64 to nano graphene is selected to be 0.001-1, so that COP-64 can be uniformly dispersed on the surface of nano graphene, and stable C ═ O bonds can be formed with hydroxyl on the graphene, and the prepared modified graphene not only has excellent dispersibility and flexibility, but also has an ultraviolet response characteristic, and is beneficial to coupling combination with each component in a weather-resistant reflective coating, so that a reflective coating with high weather resistance and plasticity is formed.

A preparation method of a high-weather-resistance reflective coating is obtained by adopting photocuring printing.

Preferably, the method comprises the following steps:

s1, uniformly mixing the organic silicon light-cured oligomer, the polycarbonate, the thermosetting resin, the coupling agent and the reactive diluent to obtain a solution A; uniformly mixing a polymerizable antistatic agent and the modified graphene to obtain a solution B;

s2, uniformly mixing the solution A and the solution B, selecting light waves with the wavelength of 385-400nm as a light source, and carrying out photocuring printing at the temperature of 30-45 ℃ to finally obtain the high-weather-resistance reflective coating.

Preferably, in step S1, the solution A is obtained by mixing at the temperature of 10-20 ℃ and standing for 20-40 min. Firstly, uniformly mixing the organic silicon light-cured oligomer, the polycarbonate, the thermosetting resin, the coupling agent and the reactive diluent, and standing at 10-20 ℃ to ensure that all components in the solution A are fully contacted and coupled to form a stable organic polymer, thereby increasing the crosslinking density and hardness of all components in the coating.

Preferably, in step S2, the solution A and the solution B are uniformly mixed and dried for 60-80min at the temperature of 10-20 ℃ and the vacuum degree of 0.08-0.1 MPa. The modified graphene is favorably and fully contacted with all components, is uniformly dispersed, and is dried to discharge redundant moisture to form a ground-state raw material favorable for photocuring printing.

Preferably, the highly weatherable reflective coating has a thickness of 0.01 to 2 mm.

According to the invention, the COP-64 modified nano-graphene is adopted, the COP-64 is applied to the reflective coating for the first time by taking the nano-graphene as a carrier, and the light-cured 3D printing technology is combined to prepare the reflective coating, under the ultraviolet response effect of the COP-64, the light-cured printing can be carried out without adding a photoinitiator, and meanwhile, the electronic transition is initiated to generate certain heat and fluorescence after the COP-64 absorbs ultraviolet light. In addition, the preparation method adopted by the invention is simple, the photocuring reaction is formed in one step, no by-product or pollutant is generated, the thickness and the size of the reflective coating can be flexibly prepared according to the requirement by adopting the photocuring printing technology, and the obtained reflective coating has excellent plasticity.

The reflective coating prepared by adopting the components such as the organic silicon light-cured oligomer, the polycarbonate, the thermosetting resin, the modified graphene and the like under the mutual coupling synergistic effect under the action of the polymerizable antistatic agent, the coupling agent, the reactive diluent and other auxiliaries has excellent weather resistance and plasticity. Therefore, the invention has the following beneficial effects:

the crosslinking density and hardness of each component in the coating are increased, and the mechanical strength and weather resistance of the coating are improved;

the photocuring printing technology is adopted, the preparation method is simple, the one-step forming is realized, and the preparation process is environment-friendly and pollution-free;

under the synergistic effect of the components, the thickness and the size of the coating can be flexibly printed according to the requirement by the preparation method, and the prepared reflective coating has excellent plasticity.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the methods provided by the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Example 1:

a high-weather-resistance reflective coating comprises the following components in parts by weight:

the preparation method of the modified graphene comprises the following steps: mixing COP-64 and the nano-graphene solution, and ultrasonically shaking at the temperature of 15 ℃ for 60min, wherein the mass ratio of COP-64 to nano-graphene is 1.

The preparation method of the high-weather-resistance reflective coating is obtained by adopting photocuring printing and comprises the following steps:

s1, uniformly mixing organic silicon epoxy resin, polycarbonate, thermosetting resin, a coupling agent and an active diluent at the temperature of 20 ℃, and standing for 40min to obtain a solution A; uniformly mixing a polymerizable antistatic agent and the modified graphene to obtain a solution B;

s2, uniformly mixing the solution A and the solution B, drying for 80min at the temperature of 20 ℃ and the vacuum degree of 0.1MPa, selecting light waves with the wavelength of 400nm as a light source, and carrying out photocuring printing at the temperature of 45 ℃ to finally obtain the high-weather-resistance reflective coating, wherein the thickness of the high-weather-resistance reflective coating is 2 mm.

The prepared high-weatherability reflecting coating is subjected to performance test, and the light transmittance is 31 percent, the breaking strength is 3.8kg/inch, and the elongation is 220 percent.

Example 2:

a high-weather-resistance reflective coating comprises the following components in parts by weight:

the preparation method of the modified graphene comprises the following steps: mixing COP-64 and the nano-graphene solution, and ultrasonically shaking at 10 ℃ for 30min, wherein the mass ratio of COP-64 to nano-graphene is 0.001.

The preparation method of the high-weather-resistance reflective coating is obtained by adopting photocuring printing and comprises the following steps:

s1, uniformly mixing the organic silicon polyurethane, the polycarbonate, the thermosetting resin, the coupling agent and the active diluent at the temperature of 10 ℃, and standing for 20min to obtain a solution A; uniformly mixing a polymerizable antistatic agent and the modified graphene to obtain a solution B;

s2, uniformly mixing the solution A and the solution B, drying for 60min at the temperature of 10 ℃ and the vacuum degree of 0.08MPa, selecting light waves with the wavelength of 385nm as a light source, and carrying out photocuring printing at the temperature of 30 ℃ to finally obtain the high-weather-resistance reflective coating, wherein the thickness of the high-weather-resistance reflective coating is 0.01 mm.

The high weather resistance reflective coating is subjected to performance test, and the light transmittance is 43 percent, the breaking strength is 3.6kg/inch, and the elongation is 235 percent.

Example 3:

a high-weather-resistance reflective coating comprises the following components in parts by weight:

the preparation method of the modified graphene comprises the following steps: mixing COP-64 with the nano-graphene solution, and ultrasonically oscillating for 40min at the temperature of 13 ℃, wherein the mass ratio of COP-64 to nano-graphene is 0.01.

The preparation method of the high-weather-resistance reflective coating is obtained by adopting photocuring printing and comprises the following steps:

s1, uniformly mixing organic silicon polymethyl methacrylate, polycarbonate, thermosetting resin, a coupling agent and an active diluent at the temperature of 14 ℃, and standing for 30min to obtain a solution A; uniformly mixing a polymerizable antistatic agent and the modified graphene to obtain a solution B;

s2, uniformly mixing the solution A and the solution B, drying for 70min at the temperature of 15 ℃ and the vacuum degree of 0.09MPa, selecting light wave with the wavelength of 390nm as a light source, and carrying out photocuring printing at the temperature of 35 ℃ to finally obtain the high-weather-resistance reflective coating, wherein the thickness of the high-weather-resistance reflective coating is 0.09 mm.

The prepared high-weatherability reflecting coating is subjected to performance test, and the light transmittance is 29 percent, the breaking strength is 3.5kg/inch, and the elongation is 190 percent.

Comparative example:

a commercially available UV coating was applied and sprayed on the same substrate as in example by a conventional spraying method to obtain a coating layer of comparative example 1 having a thickness of 2mm, a coating layer of comparative example 2 having a thickness of 0.01mm and a coating layer of comparative example 3 having a thickness of 0.09mm, respectively. The coatings in comparative examples 1, 2 and 3 were tested for performance using the same test method as in the examples, and the test results were as follows:

the coating in comparative example 1 measured a light transmittance of 50%, a breaking strength of 2.1kg/inch, and an elongation of 90%.

The coating in comparative example 2 measured a light transmission of 56%, a breaking strength of 1.9kg/inch and an elongation of 120%.

The coating in comparative example 3 measured a light transmittance of 62%, a breaking strength of 2.5kg/inch, and an elongation of 88%.

From the above embodiments, the high weather resistance reflective coating prepared by the invention has high weather resistance, excellent plasticity and reflective performance, simple preparation method, one-step molding of photocuring reaction, and no by-product and pollutant.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.