Novel hindered amine group-contained benzotriazole light stabilizer
A technology of benzotriazole and hindered amine, applied in the field of benzotriazole light stabilizer, can solve the problems of unsatisfactory ultraviolet absorption intensity and the like
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0064]Add 10.0g (0.03195mol) 2-[2-hydroxy-4-ethoxycarbonylmethoxyphenyl]-2H-benzotriazole, 10.0 g (0.0637mol) 2,2,6,6-tetramethylpiperidinol, 0.2g dibutyltin oxide and 50mL xylene were reacted at 140°C for 6 hours. After the reaction was completed, the temperature was lowered, filtered, dried, and then recrystallized with ethyl acetate to obtain a white solid, namely 2-[2-hydroxyl-4-(2,2,6,6-tetramethylpiperidine-4-oxyl) Carbonylmethoxyphenyl]-2H-benzotriazole (compound II) 8.1g, yield 59.3%, high performance liquid chromatography (HPLC) purity 99.2%, melting point 160.8-161.0°C.
[0065] Elemental Analysis Results:
[0066]
Embodiment 2
[0068] Add 10.0 g (0.0288 mol) of 5-chloro-2-[2-hydroxy-4-ethoxycarbonylmethoxyphenyl]-2H-benzo Triazole, 10.0 g (0.0637 mol) of 2,2,6,6-tetramethylpiperidinol, 0.2 g of dibutyltin oxide and 50 mL of solvent oil were reacted at 140° C. for 7 hours. After the reaction was completed, the temperature was lowered, filtered, dried, and recrystallized from ethyl acetate to obtain a white solid, namely 5-chloro-2-[2-hydroxyl-4-(2,2,6,6-tetramethylpiperidine-4 -Oxy)carbonylmethoxyphenyl]-2H-benzotriazole (compound III) 7.7g, yield 57.8%, HPLC purity 99.1%, melting point 167.1-167.4°C.
[0069] Elemental Analysis Results:
[0070]
Embodiment 3
[0072] Add 10.0g (0.03195mol) 2-[2-hydroxy-4-ethoxycarbonylmethoxyphenyl]-2H-benzotriazole, 10.0 g (0.0585 mol) of 1,2,2,6,6-pentamethylpiperidinol, 0.2 g of tetrabutyl titanate and 50 mL of xylene were reacted at 140° C. for 6 hours. After the reaction was completed, the temperature was lowered, filtered, dried, and then recrystallized with ethyl acetate to obtain a white solid, namely 2-[2-hydroxyl-4-(1,2,2,6,6-pentamethylpiperidine-4-oxo yl)carbonylmethoxyphenyl]-2H-benzotriazole (compound IV) 7.8g, yield 55.4%, HPLC purity 99.3%, melting point 114.3-114.8°C.
[0073] Elemental Analysis Results:
[0074]
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More 
PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.
