Stabilized carriers with .beta. phase poly(vinylidenefluoride)

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

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430108, G03G 9107, G03G 9113

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active

055166156

ABSTRACT:
A method for converting .alpha.-phase poly(vinylidene fluoride) to .beta.-phase poly(vinylidene fluoride), for preparing electrostatographic carrier and, electrostatographic developer and carrier. In the method for preparing electrostatographic carrier, uncoated electrostatographic carrier particles are coated with .alpha.-phase poly(vinylidene fluoride) to provide .alpha.-phase poly(vinylidene fluoride) coated carrier particles. A measurable portion of the .alpha.-phase poly(vinylidene fluoride) is then converted to .beta.-phase poly(vinylidene fluoride) by subjecting the .alpha.-phase poly(vinylidene fluoride) to a series of viscoelastic collisions having a total energy of from about 5.times.10.sup.4 to about 5.times.10.sup.5 Joules/kilogram of poly(vinylidene fluoride).

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