PROCESS FOR DEVULCANIZING VULCANIZED FLUOROELASTOMERS, FLUOROELASTOMERS THEREOF AND THEIR USE

摘要

A process for devulcanizing fluoroelastomers having a fluorine content between 62% and 74% by weight vulcanized by ionic systems, preferably selected from bisphenol A and bisphenol AF, i.e. 2,2-bis(4-hydroxyphenyl)hexafluoropropane, said process being characterized in that it comprises a step of heating said vulcanized fluoroelastomers in the presence of a hydrolysis composition consisting of one or more chemical selected from water, water soluble alcohols, water soluble glycols and mixtures thereof, at a temperature from 350°C to 430°C. Fluoroelastomers obtainable by said process and their use for the preparation of compounds and vulcanized compositions are also described.