A process for the preparation of a primary hydroxyl group containing epoxy resin having from 1.5 to 2.5 epoxy groups per molecule by reacting at a temperature of from 100 to 235 °C in the presence of an etherification catalyst
a) an epoxy resin having more than 1.5 and at most 2 epoxy groups per molecule and an epoxy group concentration (EGC) of from 1 to 7 eq.kg⁻¹ with
b) an aliphatic trihydric primary alcohol having from 5 to 12 carbon atoms, under the proviso that the ratio (R) of epoxy equivalents of reactant a) to hydroxyl equivalents of reactant b) is selected within the range of from (1.2-0.11 EGC) to (1.3+0.12 EGC).
一种制备每分子具有 1.5 至 2.5 个环氧基团的含一级羟基的环氧
树脂的工艺,其方法是在醚化催化剂存在下,在 100 至 235 °C 的温度下,将 a) 每分子具有 1.5 个以上但至多 2 个环氧基团且环氧基团浓度(
EGC)为 1 至 7 eq.kg-¹ 的环氧
树脂与 b) 具有 5 至 12 个碳原子的脂肪族三
水伯醇反应,条件是反应物 a) 的环氧当量与反应物 b) 的羟基当量之比(R)在(1.2-0.11
EGC)至(1.3+0.12
EGC)的范围内选择。