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Preparation method and application of polycarbonate photoinitiator
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A technology of photoinitiator and polycarbonate, applied in the field of coatings, can solve the problems of high molecular mobility, limited application range, volatilization, etc., and achieve the effects of good storage stability, low mobility and good yellowing resistance
Active Publication Date: 2022-05-13
QINGDAO ZHANCHEN NEW MATERIAL
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[0004] Although the first type of initiators has many types, initiators with different structures can impart properties such as clean odor, yellowing resistance, fast initiation efficiency, and deep curing, but because they are all small molecular weights, they still have volatility, toxicity, and high molecular mobility. Disadvantages, which limit the scope of application
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Embodiment 4
[0042] A light-curing coating, according to mass percentage, the coating components are composed of:
[0043] Epoxy acrylate 25% (Miki Chemical SM6105-80), polyurethane acrylate 30% (Eternal Chemical 61438), leveling agent 0.3% (BYK358N), defoamer 0.2% (Tego920), dispersant 1% (BYK2009) , filler 20%, polycarbonate photoinitiator prepared in Example 2 5%, monomer dipropylene glycol diacrylate (DPGDA) consumption 18.5%.
[0044] The coating prepared by this formula is sprayed on the surface of Fraxinus mandshurica wood according to the mechanical spraying method, and is quickly cured by ultraviolet light, which can greatly improve the production efficiency. The performance test results are shown in Table 1.
Embodiment 5
[0046] A light-curing coating, according to mass percentage, the coating components are composed of:
[0047] Polyester acrylate 25% (Ketian Chemical 2202), polyurethane acrylate 30% (Changxing Chemical 61438), leveling agent 0.3% (BYK358N), defoamer 0.2% (Tego920), dispersant 1% (BYK2009), Filler 20%, polycarbonate photoinitiator prepared in Example 3 5%, monomer tripropylene glycol diacrylate (TPGDA) consumption 18.5%.
[0048] The coating prepared by this formula is sprayed on the surface of Fraxinus mandshurica wood according to the mechanical spraying method, and is quickly cured by ultraviolet light, which can greatly improve the production efficiency. The performance test results are shown in Table 1.
Embodiment 6
[0050] A light-curing coating, according to mass percentage, the coating components are composed of:
[0052] The coating prepared by this formula is sprayed on the surface of Fraxinus mandshurica wood according to the vacuum spraying method, and is quickly cured by ultraviolet light, which can greatly improve the production efficiency. The performance test results are shown in Table 1.
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Abstract
The invention belongs to the technical field of coatings. Aiming at the problems of high volatility, toxicity and high molecular mobility of small molecule initiators used in existing photocurable coatings, the present invention provides a preparation method of a polycarbonate photoinitiator and a photocurable coating. A kind of preparation method of polycarbonate photoinitiator, comprises the following steps: small molecular photoinitiator 2-hydroxyl-4-(2-hydroxyethoxy)-2-methylpropiophenone is dissolved in organic solvent, in Under the condition of ice bath, slowly add triphosgene dissolved in organic solvent dropwise, then add the catalyst, after the dropwise addition, remove the ice bath, and react at 10-80°C for 0.5-36h; stop the reaction, and reverse-precipitate the product in In the solvent, the precipitated product is obtained, and the dissolution-reverse precipitation washing is repeated for 3 times, and the final product is dried. The initiator activity is higher than that of the existing small molecule initiator, and the mobility in the cured coating is low, and the volatility Low, little toxicity.
Description
technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a preparation method and application of a polycarbonate photoinitiator. Background technique [0002] UV photopolymerization technology is a technology that has developed rapidly in recent years. Its main components include: photocurable resin, UV monomer, and UV initiator. performance. As a new material and new technology, it has the remarkable characteristics of high efficiency, economy, energy saving, environmental friendliness, and wide adaptability. It has been widely used in 3C, wood paint, packaging and other fields. [0003] Among them, the UV initiator is the key to polymerization. The irradiation of ultraviolet rays can excite active free radicals to promote the crosslinking between molecules to form a film. The different action principles of photoinitiators can be divided into two types: the first type is cracking type Photoinitiators, the current mainst...
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