| abstract |
PURPOSE: A composition that is prepared by adding an adduct from ammonia and a hydroacid to a composition consisting of a fluoroelastomer, an acrylic elastomer containing epoxy groups, and bisphenol AF, thus giving vulcanized products that show good compression set. n CONSTITUTION: To (I 100 parts by wt of a mixed elastomer prepared by mixing (A) 5W100 parts of an acrylic elastomer containing active halogen atoms, epoxy groups, or unsaturated bonds as crosslinking groups, with (B) 100 parts of a fluoroelastomer are added (II, as a vulcanizer, (A)' 0.1W10, preferably 0.5W3 parts of 2, 2-bis(4-hydroxy)hexafluoropropane, (B)' 0.1W10 parts of a quarternary ammonium or phosphonium salt or guanidium salt as a vulcanization accelerator, (C)' 1W40 parts of a metal oxide or hydroxide, and (D) an adduct salt of ammonia or an amine with a hydroacid, as ammonium benzoate. n COPYRIGHT: (C)1979,JPO&Japio |