| 摘要 |
Phenolic polymers having 3 to 1000 repeating units of the general structural formula <IMAGE> wherein X and X1 independently are hydrogens or methyls, R is a lower alkyl of from 1 to 6 carbon atoms or an aryl, alkaryl or aralkyl of from 6 to 14 carbon atoms, and R1, R2 and R3 independently are hydrogen, lower alkyls of from 1 to 6 carbon atoms, aralkyls of from 8 to 14 carbons, or alkoxys or aralkyloxys of from 1 to about 14 carbons, are prepared in one step by contacting an R1, R2 and R3-containing phenol having two hydrogens ortho to the hydroxyl group with a low purity diolefinic hydrocarbon under ortho-alkylation conditions in the presence of an effective amount of an ortho-alkylation catalyst. These materials find use as antioxidants, especially for edibles, where their polymeric nature offers advantages.
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