Toner for developing electrostatic latent image
AssigneeMinolta Co., Ltd.
InventorsMasahiro Anno, Yoahihiro Mikuriya, Masahide Inoue
Life of this patent
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Abstract
The present invention relates to a toner for developing an electrostatic latent image comprising a colorant, a binder resin having a number-average molecular weight of 2000 to 5000 and a ratio of weight-average molecular weight/number-average molecular weight of 5 to 30, a polymer having a weight-average molecular weight of 1000 to 3000 and a ratio of weight-average molecular weight/number-average molecular weight of 2.0 or less, and a release agent.
Claims20
A toner for developing an electrostatic latent image comprising:
- a colorant;
- a binder resin having a number-average molecular weight of 2000 to 5000 and a ratio of weight-average molecular weight/number-average molecular weight of 5 to 30;
- a polymer having a weight-average molecular weight of 1000 to 3000 and a ratio of weight-average molecular weight/number-average molecular weight of 2.0 or less;
- and
- a release agent.
A toner for developing an electrostatic latent image comprising:
- a colorant;
- a binder resin having a number-average molecular weight of 2000 to 5000, a ratio of weight-average molecular weight/number-average molecular weight of 5 to 30, a glass transition point of 50 to 70° C. and a softening point of 95 to 160° C., the binder resin comprising a first polyester resin having a softening point of 80 to 125° C. and a second polyester resin having a softening point of 130 to 160° C.;
- a polymer having a weight-average molecular weight of 1000 to 3000, a ratio of weight-average molecular weight/number-average molecular weight of 2.0 or less, a glass transition point of 50 to 85° C. and a softening point of 100 to 160° C.;
- and
- a release agent.
A toner for developing an electrostatic latent image comprising:
- a colorant;
- a binder resin having a number-average molecular weight of 2000 to 5000 and a ratio of weight-average molecular weight/number-average molecular weight of 5 to 30;
- a polymer having a weight-average molecular weight of 1000 to 3000 and a ratio of weight-average molecular weight/number-average molecular weight of 2.0 or less;
- and
- a release agent, wherein the polymer and the release agent are dispersed in the binder resin, an average particle size of the polymer being 1.5 μm or less and an average particle size of the release agent being 1.5 μm or less.
A toner for developing an electrostatic latent image comprising:
- a colorant;
- a binder resin having a number-average molecular weight of 2000 to 5000, a ratio of weight-average molecular weight/number-average molecular weight of 5 to 30, a glass transition point of 50 to 70° C. and a softening point of 95 to 160° C., the binder resin comprising a first polyester resin having a softening point of 80 to 125° C. and a second polyester resin having a softening point of 130 to 160° C.;
- a polymer having a weight-average molecular weight of 1000 to 3000, a ratio of weight-average molecular weight/number-average molecular weight of 2.0 or less, a glass transition point of 50 to 85° C. and a softening point of 100 to 160° C.;
- and
- a release agent, wherein the polymer and the release agent are dispersed in the binder resin, an average particle size of the polymer being 1.5 μm or less and an average particle size of the release agent being 1.5 μm or less, the average particle size of the polymer being smaller than that of the release agent.
Dependencies are inferred from the claim text.