temperature a solution containing 1 67 gm of 1 5 pentanediol basf 1 35 gm of polypropylene oxide molecular weight 725 from aldrich 2 47 gm of mek and 0 32 gm of a 2 dibutyltin dilaurate aldrich solution in mek was added and further homogenized for 2 minutes in the final step 0 9 gm of r f amine 4900 prepared from preparation 1 in 40 0 gm of ht 200 solvay solexis was added and homogenized for 2 minutes followed by addition of additional 0 9 gm of r f amine 4900 in 33 0 gm of ht 200 and homogenization for 2 minutes a low viscosity microcapsule dispersion was obtained the microcapsule dispersion obtained was heated at 80 u00b0 c overnight and stirred under low shear to post cure the particles the resultant microcapsule dispersion was filtered through a 400 mesh 38 micrometer screen the particle and the solid content of the filtered dispersion was measured to be 29 wt by weight with an ir 200 moisture analyzer denver instrument company the average particle size of the filtered dispersion was measured with a beckman coulter ls230 particle analyzer to be about 2 u03bcm an epd fluid containing 1 0 wt by weight of cupc u2014 c 8 f 17 structure given below and prepared according to u s pat.