are prepared in examples 10 17 and then spun into fibers therewith with poorly swelling cellulose derivatives wrv less than 200 water and with strongly swelling cellulose derivatives wrv greater than 200 ethanol are employed as coagulation agents table 2__________________________________________________________________________ cellulose monoester of maleic acid reaction temperature 40 50 u00b0 c reaction period 5 h rt 15 h fiber fibermol ratio catalyst relative to wrv surv wsv strength elongationexamplecellulose acid anhydride the acid anhydride ds dp cn tex __________________________________________________________________________10 1 1 0 10 ch sub 3 cook 0 25 450 120 110 320 14 5 8 511 1 1 5 5 ch sub 3 so sub 3 h 0 32 320 160 150 370 6 3 4 612 1 1 5 6 8 ch sub 3 cook 0 57 390 390 280 520 12 1 9 313 1 2 0 5 ch sub 3 cook 0 67 385 1000 850 10 7 10 114 1 2 5 5 ch sub 3 cook 0 83 380 840 690 11 3 9 615 1 3 0 10 ch sub 3 cook 1 18 300 270 350 8 5 6 016 1 3 5 10 ch sub 3 cook 1 23 200 190 260 17 1 4 0 10 ch sub 3 cook 1 35 180 170 240 __________________________________________________________________________ example 18 500 g 3 08 mol cellulose are suspended in 8600 g 98 85.