Fluoroelastomer composition with low tendency to foul molds

A composition that exhibits low tendency to foul mold cavities comprising a fluoroelastomer of vinylidene fluoride units and units of at least one other fluorine-containing monomer copolymerizable with vinylidene fluoride; a bisphenol or a polyhydroxy phenol crosslinking agent of the formula where R...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SCHMIEGEL, WALTER WERNER, CARLSON, DANA PETER
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:A composition that exhibits low tendency to foul mold cavities comprising a fluoroelastomer of vinylidene fluoride units and units of at least one other fluorine-containing monomer copolymerizable with vinylidene fluoride; a bisphenol or a polyhydroxy phenol crosslinking agent of the formula where R is H, alkyl or aryl and R min is alkyl or aryl; a divalent metal oxide or hydroxide; and 0.2-4 parts by weight per 100 parts by weight fluoroelastomer of a crosslinking accelerator which is a quaternary ammonium salt of the formula R @NX wherein each R sec is independently an alkyl group of 2-10 carbon atoms or an aralkyl group of 7-10 carbon atoms and X is selected from the group consisting of fluoride, dihydrogen phosphate, periodate, acetate, hydrogen sulfate, methane sulfonate, toluene sulfonate, or an anion of a bisphenol or a polyhydroxy phenol.