| 摘要 |
PROBLEM TO BE SOLVED: To obtain a poly(halogen-substituted-4-hydroxystyrene) by reacting 4-hydroxyacetophenone with a halogenated reagent to give a corresponding 3-mono or 3,5-dihalogen-substituted derivative, esterifying the derivative, reducing the ester to give an ethanol compound, dehydrating the ethanol compound to give a styrene compound, subjecting the styrene compound to radical polymerization to give a polymer, and hydrolyzing the polymer. SOLUTION: 4-Hydroxyacetophenone represented by the formula (wherein R1 is H or a 1-10C alkyl; and R2 and R3 are each H, alkyl, alkoxy or halogeno) is reacted with a halogenated reagent to give a corresponding 3-mono or 3,5- dihalogen-substituted-4-hydroxyacetophenone, which is esterified to form 4- acetoxyacetophenone. This ester is reduced with a sufficient amount of a reducing agent to give acetoxyphenyl ethanol, which is dehydrated to give 4- acetoxystyrene. The 4-acetoxystyrene is subjected to free-radical polymerization to give a polymer having a molecular weight of 1,000 to 800,000, and this polymer is hydrolyzed to give an objective material. |
