Toner for developing electrostatically charged image and process for producing the same
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United States of America Patent
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Issued Date -
Nov 12, 2009
app pub date -
May 5, 2009
filing date -
May 6, 2008
priority date (Note) -
Abandoned
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Abstract
Provided as toners for developing electrostatically charged images capable of preventing a sticking and curling phenomenon even with an increase in number of printed sheets and processes for producing the same, with the use of a cyclic polyolefinic resin, are a toner for developing electrostatically charged images contains a cyclic polyolefinic resin and a polar resin wherein 10 to 50 parts by weight of the polar resin is present in relation to 100 parts by weight of the cyclic polyolefinic resin, and a process for producing a toner for developing electrostatically charged images comprises a step of melt-kneading at least a cyclic polyolefinic resin and a coloring agent to obtain a kneaded product, a step of grinding the kneaded product to obtain colored particles, and a step of melt-kneading, grinding and classifying the colored particles and a polar resin to obtain the toner.
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