UV-curable elastic polyurethane acrylate emulsion and synthesis method thereof
A polyurethane acrylic and ultraviolet light technology, applied in polyurea/polyurethane coatings, applications, coatings, etc., can solve the problems of reaction failure, system gelation, and high viscosity of the reaction system, and achieve easy control, fast curing speed, and polymerization reaction. smooth effect
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Embodiment 1
[0024] Mix 1510g polytetrahydrofuran diol (number-average molecular weight: 2000), 150g dimethylol propionic acid, 102.3g 1,4-cyclohexanediol and 574.4g toluene diisocyanate, react at 80°C for 2.5h to form polyurethane prepolymer body. Add 120g hydroxyethyl acrylate, 0.32g dibutyltin dilaurate and 0.65g p-methoxyphenol at 85°C, mix uniformly and react for 2 hours to form polyurethane acrylate. After cooling down to 60°C, add 500mL of acetone to dilute, then add 101g of triethylamine to neutralize and form a salt, and finally add 4173g of deionized water to form a water-based polyurethane emulsion after hydration for 0.5h, and perform vacuum desolventization under reduced pressure. Finally, 331 g of photoinitiator was added, and after mixing evenly, a UV-curable aqueous polyurethane acrylate elastic emulsion was prepared, and its solid content and viscosity were tested. The prepared emulsion was coated on a polytetrafluoroethylene board, dried or dried, then cured by ultraviol...
Embodiment 2
[0026] Mix 1510g polytetrahydrofuran diol (number average molecular weight 2000), 150g dimethylol propionic acid, 53.9g 1,4-cyclohexanediol and 622.8g isophorone diisocyanate, react at 80°C for 2.5h to form Polyurethane prepolymers. Add 120g hydroxyethyl acrylate, 0.32g triphenylbismuth and 0.65g p-methoxyphenol at 85°C, mix well and react for 2 hours to form polyurethane acrylate. After cooling down to 60°C, add 500mL of acetone to dilute, then add 101g of triethylamine to neutralize and form a salt, and finally add 4173g of deionized water to form a water-based polyurethane emulsion after hydration for 0.5h, and perform vacuum desolventization under reduced pressure. Finally, 331 g of photoinitiator was added, and after mixing evenly, a UV-curable aqueous polyurethane acrylate elastic emulsion was prepared, and its solid content and viscosity were tested. The prepared emulsion was coated on a polytetrafluoroethylene board, dried or dried, then cured by ultraviolet light, an...
Embodiment 3
[0028] Mix 1510g polytetrahydrofuran diol (number-average molecular weight: 2000), 150g dimethylol propionic acid, 45g 1,4-butanediol and 631.8g isophorone diisocyanate, and react at 80°C for 2.5h to form polyurethane pre- Polymer. Add 120g of hydroxyethyl acrylate, 0.32g of dibutyltin dilaurate and 0.65g of hydroquinone at 85°C, mix uniformly and react for 2 hours to form polyurethane acrylate. After cooling down to 60°C, add 500mL of acetone to dilute, then add 101g of triethylamine to neutralize and form a salt, and finally add 4173g of deionized water to form a water-based polyurethane emulsion after hydration for 0.5h, and perform vacuum desolventization under reduced pressure. Finally, 331 g of photoinitiator was added, and after mixing evenly, a UV-curable aqueous polyurethane acrylate elastic emulsion was prepared, and its solid content and viscosity were tested. The prepared emulsion was coated on a polytetrafluoroethylene board, dried or dried, then cured by ultravi...
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