| 摘要 |
PURPOSE:To reduce the amount of bromine used and obtain the titled polymer without increasing viscosity at a low cost, by reacting a brominated novolak type polymer having a specific structure with an epihalohydrin in the presence of an alkali and using aqueous hydrogen peroxide. CONSTITUTION:(A) (i) A novolak polymer expressed by formula I (R is H or methyl; n is an average value of 0-10) is reacted with (iii) bromine in (ii) an organic solvent in the presence of (iv) hydrogen peroxide and the resultant product is then treated with (v) a reducing agent to provide a brominated novolak type polymer expressed by formula II (x and y are respectively 0-2, but are not 0 at the same time), which is then reacted with (C) an epihalohydrin in the presence of (B) an alkali to afford the aimed polymer.
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