Definite amount of CMC was dissolved in 1% NaOH solution with
continuous mechanical stirring until a homogeneous viscous mixture
was obtained then different concentrations of epichlorohydrin
(1–10% based on weight of bath) was added drop wise with continuous
stirring. The formed paste, was transferred to Petri dish, dried
in an oven at 80 ◦C for 5 min then cured for 3–7 min at different
temperature (120–140 ◦C).