Hindered phenolic antioxidant having stellate molecular structure, and synthesis method and application thereof
A technology of molecular structure and hindered phenols, which is applied in the field of polyamide resin, can solve the problems of high thermal stability and compatibility of antioxidants, and it is difficult for antioxidants to achieve the desired effect, so as to inhibit the yellowing phenomenon , good compatibility and easy access to raw materials
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Embodiment 1
[0030] Synthetic compound MPCP (n=0)
[0031] Add 100G of methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and 200G of ethylene glycol into the reaction flask. The temperature was raised to 40° C., stirring was started, and 0.45 g of tetraisopropyl titanate was added. The reaction temperature was raised to 75°C and distillate methanol began to collect. The reaction temperature was raised up to 95°C until there was no methanol distillate, and the reaction lasted for 5 hours. After the reaction was stopped, 200 mL of toluene was added to the reaction mixture, and the organic phase was washed three times with 300 mL of saturated brine, and once with 150 mL of pure water. The collected organic phase was concentrated by vacuum distillation to remove all volatile substances to obtain light yellow viscous liquid (ie compound MPCP) 110G.
[0032] Synthesis of Compound I (n=0)
[0033] 150 mL of dichloromethane, 13 G of TEA and 31 G of trimesoyl chloride were added to the rea...
Embodiment 2
[0035] Synthetic compound MPCP(n=1)
[0036] Add 100G of methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and 265G of diethylene glycol into the reaction flask. The temperature was raised to 40° C., stirring was started, and 0.45 g of tetrabutyl titanate was added. The reaction temperature was raised to 75°C and distillate methanol began to collect. The reaction temperature was raised up to 105°C until there was no methanol distillate, and the reaction lasted for 5 hours. After the reaction was stopped, 200 mL of toluene was added to the reaction mixture, and the organic phase was washed three times with 300 mL of saturated brine, and once with 150 mL of pure water. The collected organic phase was concentrated by vacuum distillation to remove all volatile substances to obtain light yellow viscous liquid (ie compound MPCP) 126G.
[0037] Synthesis of Compound I (n=1)
[0038] 150 mL of dichloromethane, 13 G of TEA and 31 G of trimesoyl chloride were added to the react...
Embodiment 3
[0040] Synthetic compound MPCP(n=2)
[0041] Add 100G of methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and 450G of triethylene glycol into the reaction flask. The temperature was raised to 40° C., stirring was started, and 0.75 g of tetraisopropyl titanate was added. The reaction temperature was raised to 75°C and distillate methanol began to collect. The reaction temperature was raised up to 110°C until no methanol distillate was present, and the reaction was carried out for a total of 6 hours. After the reaction stopped, 350 mL of toluene was added to the reaction mixture, and the excess triethylene glycol in the lower layer was separated under heating conditions (temperature 50° C.). The organic phase was washed once with 50 mL of pure water, and the collected organic phase was concentrated by vacuum distillation to remove all volatile substances to obtain a light yellow viscous substance (ie compound MPCP) 145G.
[0042] Synthesis of Compound I (n=2)
[0043] 15...
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