| abstract |
Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with certain hydrazide curatives. The hydrazide is of the general formula R 1 (C(O)) n NHNHR 2 , wherein n is 1 or 2; R 1 is NH 2 , NHNH 2 , NHR 3 , NR 3 n 2 , NHNHC(O)NH 2 , NHNHC(O)NHNH 2 , NHNHR 2 , or NHC(O)NHNH 2 ; R 2 is H, alkyl, aryl, heterocycle, CO 2 R 3 , C(O)R 3 , CH 2 R 4 , or C(O)R 4 ; R 3 is alkyl, aryl, heterocycle, or CH 2 R 4 ; and R 4 is a fluoroalkyl group. |