Crosslinking of TSP with epichlorohydrin
Partial crosslinking of TSP with epichlorohydrin was done by the method reported earlier with
some modifications (vide ref. 8). Briefly 10g of TSP powder was soaked in water. To this 50ml
of 1 N sodium hydroxide was added and the temperature was maintained at 54°C and
homogenized for 15 minutes. Then 0.5ml epichlorohydrin was slowly added with continuous
homogenization for 15 minutes resulting in a gel. The gel was then neutralized with acetic acid
and washed 3 times with a solution of water/acetone (60:40 v/v). The resulting solid gel was
washed with pure acetone over a filter. The obtained mass was air dried at room temperature for
72 hours, grounded and passed through BSS#85 and stored in airtight container.