TWO-COMPONENT DEVELOPER
First Claim
1. A two-component developer containing a magnetic carrier and a toner,wherein the magnetic carrier comprises magnetic carrier particles each of which comprises a filled core particle and a silicone resin B, the surface of the filled core particle being coated with the silicone resin B,wherein the filled core particle comprises a porous magnetic core particle and a silicone resin A, pores of the porous magnetic core particle being filled with a silicone resin A,wherein the silicone resin A is a silicone resin cured in the presence of a non-metal catalyst or without a catalyst, while the silicone resin B is a silicone resin cured in the presence of a metal catalyst having titanium or zirconium,and wherein the toner contains a binder resin, a release agent and a colorant, and has an average circularity of 0.940 or more.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a two-component developer having excellent developing performance and little change in image concentration, and achieving long-term suppression of image defects such as transfer failure and fogging.
Provided is a two-component developer containing a magnetic carrier and a toner, wherein the magnetic carrier has magnetic carrier particles comprising a silicone resin B coated on the surfaces of filled core particles in which pores of porous magnetic core particles are filled with a silicone resin A, the silicone resin A is a silicone resin cured in the presence of a non-metal catalyst or without a catalyst, while the silicone resin B is a silicone resin cured in the presence of a metal catalyst having titanium or zirconium, and the toner contains a binder resin, a release agent and a colorant, and has an average circularity of 0.940 or more.
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Citations
3 Claims
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1. A two-component developer containing a magnetic carrier and a toner,
wherein the magnetic carrier comprises magnetic carrier particles each of which comprises a filled core particle and a silicone resin B, the surface of the filled core particle being coated with the silicone resin B, wherein the filled core particle comprises a porous magnetic core particle and a silicone resin A, pores of the porous magnetic core particle being filled with a silicone resin A, wherein the silicone resin A is a silicone resin cured in the presence of a non-metal catalyst or without a catalyst, while the silicone resin B is a silicone resin cured in the presence of a metal catalyst having titanium or zirconium, and wherein the toner contains a binder resin, a release agent and a colorant, and has an average circularity of 0.940 or more.
Specification