14 14 34 true 34 tack 53 39 60 57 48 21 9 22 17__________________________________________________________________________ table xvii__________________________________________________________________________ stocks 29 30 31 32 33 34 35 36 37__________________________________________________________________________masterbatchce 185 0 cf 185 75 cg 186 0 ch 187 0 ci 188 0 cj 190 0 ck 190 75 cl 191 0 cm 190 3curativessulfur 2 0 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 mbts 0 8 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 n t butyl 2 benzothiazyl 0 5 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 sulfenamidecure time min 153 u00b0 c 35 25 40 45 45 60 40 60 60shore a hardness 68 67 68 70 70 68 70 68 71stress strain propertiesstress at indicated strain mpa100 3 42 3 79 3 85 4 09 4 10 3 12 3 38 3 48 4 00200 9 29 10 51 10 43 10 99 11 11 8 27 9 42 9 69 10 62300 15 34 17 13 16 62 17 40 17 94 13 92 15 85 15 67 17 33break stress 20 75 20 24 20 22 20 28 18 73 18 63 19 65 20 29 20 13break strain 425 358 377 347 313 414 384 400 352__________________________________________________________________________ to evaluate the effectiveness of mercaptans as component a a series of compounds is prepared containing 2 mercaptobenzothiazole and thiophenol compared with mbts as component a the rubber compounds based on synthetic polyisoprene are prepared and tested as before using.