UV skin-feeling wood coating as well as preparation method and application thereof
A wood coating and skin-feeling technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of high one-time investment cost, high operating cost and insufficient flatness of excimer lamp curing technology, and improve the delicate hand feeling. , Improve the curing speed, the effect of high activity
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Embodiment 1
[0066] In a 1000mL four-necked flask, 750 grams of polycaprolactone diol (Perstorp CAPA2302, molecular weight 3000), 70.5 grams (0.5mol) of ethyl isocyanate acrylate, 0.12 grams of dibutyltin dilaurate as a catalyst, and parahydroxyl Take 0.8 g of anisole, slowly heat up to 80°C-85°C for 0.5-4 hours, heat-retain, stir and react for 3-5 hours, and discharge the material to obtain a bifunctional polycaprolactone urethane acrylate with the structure shown in the following formula.
[0067]
[0068] R is: 1,4-butylene (-CH 2 CH 2 CH 2 CH 2 -), that is, the glycol initiator in the polycaprolactone diol is 1,4-butanediol;
[0069] a+b=(3000-90) / 114=25.5263.
Embodiment 2
[0071] In the 6L autoclave, drop into 1340 grams of 2,2-dimethylol propionic acid (C 5 h 10 o 4 , molecular weight 134), 40 grams of sodium formate, warming up to 155 ° C, began to drop ethylene oxide ( Molecular weight 44) 2200 grams for reaction, temperature control 155 ℃ ~ 165 ℃, pressure 0.10 ~ 0.40MPa, dropwise for 3 to 4 hours, after the drop is completed, 155 ℃ ~ 165 ℃ for 2 to 3 hours, and then cooled to below 80 ℃ , discharging to get the crude product; the crude product was added 40 grams of activated clay and stirred for 30 minutes, and filtered to obtain clear and transparent trihydroxy polyether ester (C 15 h 30 o 9 , molecular weight 354) 3469.2 grams, reaction formula, structure as shown in the following formula, wherein: n=2, a+b+c=5.
[0072]
[0073] In the 3000mL four-necked flask, drop into trihydroxy polyether ester (C 15 h 30 o 9 , molecular weight 354) 177 grams, IPDI 333 grams (1.5mol), catalyst dibutyltin dilaurate 0.2 grams, be warming up ...
Embodiment 3
[0082] In a 2000mL four-necked flask, 1000 grams of polyether modified polysiloxane (Zhejiang Xin'an Chemical Industry Group Co., Ltd., a special organic silicon product for UV resin modification, model: 7520, molecular weight 2000), and 141 grams of isocyanate ethyl acrylate ( 1mol), catalyst dibutyltin dilaurate 0.12 grams, polymerization inhibitor p-hydroxyanisole 0.9 grams, 0.5 ~ 4 hours slowly warming up to 80 ℃ ~ 85 ℃ stirring reaction for 3 ~ 5 hours, discharging, obtained 2 functional Polysiloxane type urethane acrylate.
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