Negative-chargeability control resin
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United States of America Patent
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Jul 20, 2004
Grant Date -
Oct 9, 2003
app pub date -
Mar 10, 2003
filing date -
Mar 11, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A negative-chargeability control resin containing a specific vinyl copolymer imparts stable chargeability to toner. The vinyl copolymer is obtainable by copolymerizing a monomer composition which contains at least i) a vinyl monomer (A) as exemplified by N-acryloylmorpholine, N-isopropylacrylamide, N-methylmethacrylamide, N-butoxymethylacrylamide or N-t-butylacrylamide, or a vinyl monomer (B) as exemplified by vinyl butyrate, vinyl 2-ethylhexanoate, vinyl benzoate, vinyl monochloroacetate pivarate, and ii) a vinyl monomer (C) having as a functional group a carboxyl group or a carboxyl group made into salt structure.
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