| 摘要 |
1475973 Production of 2,2<SP>1</SP>-Methylenebis- (4,6-dialkylphenols) N I INST REZINOVYKH I LATEXNYKH IZDELY and STERLITAMAX OPYT PROMYSH ZAVOD PO PROIZVOD IZOPRENOV KAUCHUKA 16 Dec 1975 51407/75 Heading C2C A 2,2 - methylenebis(4,6 - dialkylphenol) is obtained by reacting a 2,4-dialkylphenol with an acetal in the presence of an acid catalyst at a temperature from 30‹ to 140‹ C., initially the acetal being present in an amount in the range of from 1 to 10 moles per mole of the 2,4-dialkylphenol. The acetal is preferably a methylal, dimethylformal, diethylformal, dimethylacetal or di-isopropyl acetal. |
