6 good 51 62 584 5 5 1 8 fair 93 68 625 5 1 2 5 good 71 53 506 4 10 1 5 good 102 56 477 4 5 2 2 good 90 59 588 4 1 2 5 good 81 52 449 3 7 3 2 5 good 54 56 4210 3 5 3 3 good 89 53 4811 3 1 3 0 good 65 56 5112 8 6 7 5 good 53 16 1313 8 5 7 good 64 24 1514 10 10 5 2 good 57 24 1215 11 10 5 7 good 74 23 1516 16 10 3 5 good 46 40 2317 17 10 2 2 good 96 40 2818 10 10 6 good 54 20 1119 10 10 5 good 55 63 1820 10 10 4 good 53 35 2221 10 5 3 good 72 41 33__________________________________________________________________________ fav is relative formic acid viscosity obtained by measuring the viscosit at 25 u00b0 c of a 11 solution of the polymer in formic acid astm 78962t cooh indicates carboxyl groups per 10 sup 6 g polymer and nh sub 2 indicates amine groups per 10 sup 6 g polymer measured as in u s pat no 4 356 280 col.