A lab. synthesis of a low-M epoxy resin from epichlorohydrin and bisphenol A with aq. NaOH as catalyst was studied in 3-factorial expts. using addn. temp. (x(1) =40-80 degrees C), NaOH concn. (x(2) =30-45%), and condensation temp. (x(3) =40-60 degrees C) as variates to find-the max. yield of diglycidyl ether of bisphenot A (Y-1) at a min. amt. of bisphenol A alpha-glycols (Y-2). From the resulting eqns., at x(1) = 40 degrees C, Y-1 was max. at 68% when x(2) = 26-32%, x(3) = 58-62 degrees C. At x(1) = 40 degrees C, Y-2 was min. at 1.6% when x(2) = 34-40%, x(3) = 56-60 degrees C. At x(3) = 38-48 degrees C and x(2) =45%, Y-2 = 0.5%. At x(1) = 78-85 degrees C, x(2) =36-46%, and x(3) = 38-48 degrees C, Y-2 = 0.1%. At the extremes of Y-1 and Y-2, the x(2)-regions are entirely and the x(3)-regions only partly disjunctive. As a compromise, Y-1 is max. at 81% when x(1) = 78-85 degrees C, x(2) = 45%, x(3) = 58-62 degrees C; Y-2 is then 0.2-0.45%. The low Y-2-values were presumably conducive to the good mech. properties of the resulting triethylenetetraamine-cured products.