| 摘要 |
Polyhydrioxy-diaryl-alkanes, -cycloalkanes and aralkanes are prepared by adding a mono- or polyhydric phenol to an alkenyl phenol of the formula: <FORM:0963294/C1/1> wherein R1, R2 and R3, which are the same or different, are hydrogen atoms or alkyl, cycloalkyl or aryl hydrocarbon radicals or R1 and R2 can be joined to form a 6-membered cycloaliphatic ring, in the presence of 0.001 to 20% by weight of an anhydrous acidic catalyst or of 0.01 to 20% by weight of an alkaline catalyst, said percentages being based on the total weight of the phenolic reaction components. The reaction is preferably carried out under anhydrous conditions, at between 0 DEG and 40 DEG C. in the case of acidic catalysts, and at from 50 DEG to 200 DEG C. in the case of alkaline catalysts. Inert solvents such as aromatic hydrocarbons, chlorinated hydrocarbons, ethers or alcohols may be used if desired. Phenols and alkenyl phenols used in the examples are: phenol, o-, m- and p-cresols, o-chlorophenol, o-cyclohexylphenol, 2, 6-diethylphenol, resorcinol, 2, 6-dichlorophenol and a -naphthol; and p-isopropenylphenol, p-(1-phenyl vinyl)-phenol and p-(1-methyl -2- methylvinyl)-phenol. Other starting materials mentioned include octyl- and decyl-phenols, bromophenols, guaiacol and pyrogallol; 2-methyl -4- (1-methyl-vinyl)-phenol and p-(1, 2-cyclohexenyl)-phenol. Specification 905,994 is referred to. |
