| 摘要 |
Perfluoroalkyl substituted alcohols can be reacted with substituted hydroxyphenylalkanoic esters to form perfluoroalkyl containing hydroxyphenylalkanoic ester antioxidants of the formula I, II or III <CHEM> <CHEM> <CHEM> wherein R1 and R2 are independently e.g. alkyl of 1 to 4 carbon atoms, R3 is e.g. hydrogen, A is e.g. ethylene, m is e.g. 2 or 3, n is 1 or 0, Rf is e.g. perfluoroalkyl of 6 to 12 carbon atoms, E is e.g. alkylene of 2 to 6 carbon atoms and X is e.g. -S-. These perfluoroalkyl substituted hindered hydroxyphenyl alkanoates are stabilizers which confer superior processing stability to polymers processed at elevated temperatures such as polypropylene, as well as protecting said polymers from thermal and oxidative degradation. |
