Precoating composition, uv curing product and preparation method thereof
A composition and coating technology, used in polyester coatings, epoxy resin coatings, polycarbonate coatings, etc., can solve the problem of UV coatings being difficult to adhere to the surface of the substrate, and achieve increased density, improved adhesion, and improved The effect of cohesion and water resistance
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[0036] According to another aspect of the present invention, there is also provided a method for preparing a UV curable product, comprising the following steps: diluting the above-mentioned pre-coating composition and placing it on the plastic substrate layer, and the solid content in the diluted solution is preferably 5% to 10%; dry the pre-coating composition to obtain a composite layer structure, wherein the pre-coating composition forms a pre-coating; the UV coating is placed on the surface of the pre-coating to form a UV coating; the pre-coating The layer and the UV coating are subjected to UV curing treatment, the pre-coat forms the UV-cured bottom layer, and the UV coating forms the UV-cured surface layer. Among them, the diluent for diluting the pre-coating composition is preferably deionized water, and the thickness of the UV-cured bottom layer is preferably 0.05-0.3 μm.
[0037] In this preparation method, the above-mentioned pre-coating composition is arranged on th...
Embodiment 1
[0045] The weight percent of each component in the precoat composition of the present embodiment is shown in Table 1, and the preparation method of UV curing product comprises the following steps:
[0046] 1. Provide the pre-coating composition with components and weight percentages as shown in Table 1, wherein the particle diameter of the water-based thermosetting resin emulsion is 80nm, the particle diameter of the water-based UV resin emulsion is 120nm, and the number-average molecular weight of the water-based thermosetting resin It is 30000, the weight average molecular weight is 70000, the glass transition temperature is 150 ℃, the number average molecular weight of the water-based UV resin is 35000, the glass transition temperature is 50 ℃, and the content of the water-based thermosetting resin in the water-based thermosetting resin emulsion is 30%. When the acid value of the water-based thermosetting resin emulsion was 12mgKOH / g, the content of the water-based UV resin ...
Embodiment 2
[0051] The weight percent of each component in the precoat composition of the present embodiment is shown in Table 1, and the preparation method of UV curing product comprises the following steps:
[0052] 1. Provide the pre-coating composition with components and weight percentages as shown in Table 1, wherein the particle diameter of the water-based thermosetting resin emulsion is 80nm, the particle diameter of the water-based UV resin emulsion is 120nm, and the number-average molecular weight of the water-based thermosetting resin 25,000, the weight average molecular weight is 55,000, the glass transition temperature is 150°C, the number average molecular weight of the water-based UV resin is 30,000, the glass transition temperature is 70°C, and the content of the water-based thermosetting resin in the water-based thermosetting resin emulsion is 30%. At this time, the acid value of the water-based thermosetting resin emulsion is 12mgKOH / g, and the content of the water-based ...
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Abstract
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