Patent ID: 7253236
Filing Date: 2007-08-07
Classification: C08F,C08K

Abstract:
1. A process for making a grafted fluoroelastomer, said process comprising: a) mixing in the bulk i) a polyhydroxy curable fluoroelastomer gum, said fluoroelastomer being substantially free of nucleophilic endgroups with ii) a monophenol having a pendant group, iii) an accelerator and iv) an acid acceptor to form a graftable fluoroelastomer composition; and b) heating said graftable composition at a temperature between 80° C. and 250° C., thereby producing a grafted fluoroelastomer having a plurality of pendant groups bonded to carbon atoms on said grafted fluoroelastomer through monophenols, said grafted fluoroelastomer being substantially free of nucleophilic endgroups and having a Mooney viscosity, ML(1+18) at 135° C., of less than 160.