Electrophotography carrier having domains dispersed in a matrix resin with a dispersion assistant interposed
AssigneeMinolta Camera Kabushiki Kaisha
InventorsSanji Inagaki, Shoichi Tsuge, Mineyuki Sako, Kenzo Toya, Takashi Akazawa
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Abstract
This invention relates to a developer for electrophotography comprising: a domain resin phase containing specified additives, a matrix resin phase containing specified additives and a dispersion assistant, the matrix resin having a low compatibility with the domain resin, and the dispersion assistant having a compatibility with both of the domain resin and matrix resin and an Izod impact value higher than the matrix resin.
Claims18
A carrier for electrophotography comprising:
- a plurality of domains comprising a domain resin and magnetic particles;
- a matrix comprising a coloring agent and a matrix resin having a low compatibility with the domain resin;
- and
- a dispersion assistant having a high compatibility with both the domain resin and the matrix resin and having an Izod impact value higher than that of the matrix resin, said domains being dispersed in the matrix resin with the dispersion assistant interposed, said dispersion assistant composed of a copolymer comprising the domain resin component and the matrix resin component;
- said carrier having a size distribution in a range of from 50 micrometers to 100 micrometers.
A carrier for electrophotography comprising:
- a plurality of domains comprising a domain resin and magnetic particles;
- a matrix comprising a coloring agent and a matrix resin having low compatibility with the domain resin;
- and
- a dispersion assistant having an Izod impact value higher than that of the matrix resin, compatibility of the dispersion assistant with the matrix resin or the domain resin being higher than that between the matrix resin and the domain resin, said domains being dispersed in the matrix resin with the dispersion assistant interposed, said dispersion assistant composed of a copolymer comprising the domain resin component and the matrix resin component;
- said carrier having a size distribution in a range of from 50 micrometers to 100 micrometers.
A carrier for electrophotography comprising:
- a plurality of domains comprising a domain resin and magnetic particles;
- a matrix comprising a coloring agent and a matrix resin having a low compatibility with the domain resin;
- and
- a dispersion assistant composed of a copolymer comprising a component of the matrix resin and a component of the domain resin, said dispersion assistant having an Izod impact value higher than that of the matrix resin, said domains being dispersed in the matrix resin with the dispersion assistant interposed,
- said carrier having a size distribution in a range of from 50 micrometers to 100 micrometers.
A carrier for charging a toner comprising:
- a matrix resin;
- a domain resin dispersed in the matrix;
- an amount from 30 percent to 90 percent by weight based on the total amount of the carrier of magnetic compound dispersed into the domain resin,
- said carrier having a size distribution in a range of from 50 micrometers to 100 micrometers;
- and
- a dispersion assistant interposed between the matrix resin and domain resin, said dispersion assistant composed of copolymer comprising the domain resin and the matrix resin component.
Dependencies are inferred from the claim text.