| 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)NHNHR 2 , wherein R 1 is alkyl, aryl, benzyl, heterocycle, fluoroalkyl, or H; R 2 is H, alkyl, aryl, heterocycle, CO 2 R 3 , C(O)H, or CH 2 R 4 ?; R 3 ? is alkyl, CH 2 R 4 , aryl, benzyl, or heterocycle; and R 4 is a fluoroalkyl group. |