| abstract |
Liquid non-brominated perfluoropolyethers in amounts of 0 to 1 part by weight for 100 parts by weight of elastomer and derivatives thereof having brominated end groups in amounts of 0.01 to 5 parts by weight for 100 parts by weight of elastomer, having a molecular weight ranging from 500 to 10 000, are used as additives in rubber blends vulcanizable with peroxides in order to improve the processability during the extrusion and the release of the vulcanized article from the molding dies. |