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A kind of preparation method of the uv resin of surface rapid solidification
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A fast-curing, resin-based technology, applied in the field of patented UV curing, can solve problems such as strong odor and unstable storage, and achieve the effects of low odor, reduced dosage, and high conversion rate
Active Publication Date: 2021-03-30
武汉长盈鑫科技有限公司
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Problems solved by technology
The UV resin prepared by the present invention can realize the rapid curing effect on the surface, and can also solve the problem of large odor and unstable storage caused by direct addition of mercaptan
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Embodiment 1
[0042] A kind of preparation method of the UV resin of surface fast solidification, concrete steps are as follows:
[0043] S1-1: Add 236.98 (2mol) of hydroxyethyl acrylate (HEA, purity 98%) and 444.48g (2mol) of diisocyanate IPDI into the reactor, stir well, add 0.32g of dibutyltin diacetylacetonate, 0.32 gCC-01 catalyst, 0.4g p-hydroxybenzoic acid, 0.1g 3,5-di-tert-butyl-4-hydroxybenzoic acid, 0.5g p-hydroxyanisole, use a low-temperature thermostat to control the internal temperature at 10-15°C for 3h Obtain a semi-capped prepolymer;
[0044] S1-2: Then add 800g (0.8mol) of macromolecular polyol PTMG1000 (f=2, Mn=1000, polytetrahydrofuran ether glycol, and maintain 70-80°C for 3h;
[0045] S1-3: Then add 108.96g (0.2mol) of multi-functional mercaptan Karenz MT PE1 and maintain the reaction at 80-85°C for 4h to obtain the UV resin, numbered PUA-1000-PE1-20, and its NCO residue was detected Less than 0.1%.
Embodiment 2
[0047] A kind of preparation method of the UV resin of surface fast solidification, concrete steps are as follows:
[0048] S2-1: Add 450g (1mol) of macromolecular polyol Dow CP450 (f=3, Mn=450, polypropylene glycol) and 522.48g (3mol) of diisocyanate TDI into the reactor, stir well and add 0.22g Dibutyltin diacetylacetonate, 0.4g CC-01 catalyst, 0.4g p-hydroxybenzoic acid, 0.3g 3,5-di-tert-butyl-4-hydroxybenzoic acid, 0.8g p-hydroxyanisole, controlled by low temperature thermostat React at an internal temperature of 15-20°C for 3.5 hours;
[0049] S2-2: Add 227.58g (2mol) of hydroxyethyl acrylate (HEA, purity 98%), and keep the reaction at 70-75°C for 2.5h;
[0050] S2-3: Add 199.28g (0.5mol) of trimethylolpropane tris(3-mercaptopropionate), and maintain the reaction at 75-80°C for 2h;
[0051] S2-4: Add 155.48g HDDA, stir evenly, and discharge to obtain PUA-PPG-3, whose NCO residue is less than 0.1% after testing.
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Abstract
The invention provides a preparation method of UV resin with a quickly cured surface, which comprises the steps of uniformly mixing hydroxy acrylate with diisocyanate, adding a special catalyst and apolymerization inhibitor, and reacting at the temperature of 10-30 DEG C for 2-4 hours to obtain a semi-terminated prepolymer; then adding macromolecular polyol with the functionality of f, and maintaining the temperature at 70-80 DEG C to react for 2-3 hours; and adding multifunctional mercaptan, and maintaining the temperature at 70-85 DEG C to react for 2-4 hours so as to obtain the UV resin with the rapidly cured surface. The prepared UV resin can be used for a traditional UV curing system and can also be used for a UV-LED curing system, the dosage of a photoinitiator can be reduced, the effect in a colored system is particularly obvious, the effect is superior to that of directly adding free amine and sulfhydryl compounds, the storage stability is good, and the smell is lower.
Description
technical field [0001] The invention patents the field of ultraviolet light curing, and specifically relates to a UV resin with rapid surface curing and a manufacturing method. Background technique [0002] The vast majority of photocuring processes for UV-curable materials are carried out in an air environment, and the main applications are thin coating materials such as coatings and inks with a large surface-to-volume ratio, so coatings are often caused by oxygen inhibition. When the bottom layer is cured and the surface is uncured and sticky, especially in the colored system due to the competitive absorption of ultraviolet light by pigments or dyes, the phenomenon of oxygen inhibition is more obvious. Oxygen inhibition can eventually lead to a large number of oxidative structures such as hydroxyl groups, carbonyl groups, and peroxyl groups on the surface of the coating, thereby affecting the long-term stability of the coating, and may even affect the hardness, gloss, solv...
Claims
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