Abstract: The present invention is a magnetic carrier that has a magnetic carrier core and a resin coat layer, wherein the resin coat layer contains a coat resin A and a coat resin B, the coat resin A is a polymer obtained by polymerization of a (meth)acrylate ester monomer that has an alicyclic hydrocarbon group, the coat resin B is a polymer obtained by polymerization of (meth)acrylic monomer and has a polar group and an acid value of 4.0 to 50.0 mg KOH/g, the content of the coat resin A is 10 to 90 mass %, the content of the coat resin B is 10 to 90 mass %, and an acid value of the resin component in the resin coat layer is 1.0 to 10.0 mg KOH/g.

Abstract: A magnetic carrier includes resin-filled magnetic core particles including porous magnetic particles whose pores are filled with a resin, and resin coating layers on the surfaces of the resin-filled magnetic core particles. The porous magnetic particles have specific electrical properties.

Abstract: Provided is a magnetic carrier, including: a ferrite core particle; and a coating resin, in which: the coating resin has a surface resin layer and a resin composition in the stated order from a surface side thereof; the resin composition contains a resin, and an inorganic particle or carbon black that is subjected to a hydrophilic treatment; the surface resin layer contains a resin, is free of the inorganic particle or the carbon black, and has a thickness of from 0.01 ?m or more to 4.00 ?m or less; and a moisture percentage change between a moisture percentage when the magnetic carrier is left to stand under an environment of 30° C. and 80% RH for 24 hours, and a moisture percentage when the magnetic carrier is left to stand under an environment of 23° C. and 5% RH for 24 hours after the standing is 0.030 mass % or less.

Abstract: A magnetic carrier contains a resin-filled magnetic core particle and a resin covering layer provided on a surface of the resin-filled magnetic core particle. The resin-filled magnetic core particle is a porous magnetic particle containing a resin in pores thereof. The magnetic carrier has a 50% particle diameter (D50) of 30.0 ?m or more and 80.0 ?m or less on a volume basis. An electric current flowing through the magnetic carrier at a voltage of 500 V ranges from 8.0 to 50.0 ?A. A proportion JR1 of a composition that is made up of the resin in a magnetic carrier portion of a region R1 and a proportion JR2 of the composition in a magnetic carrier portion of a region R2 satisfy the following relationship. The region R1 and the region R2 are illustrated in FIG. 1. 1.20?JR2/JR1?2.00.

Abstract: Provided is a magnetic carrier, including magnetic carrier particles each including: a magnetic carrier core including a magnetic material and a resin; and a resin coating layer formed on a surface of the magnetic carrier core, in which: the resin included in the magnetic carrier core has a hydroxy group; a surface portion of the magnetic carrier core includes a specific compound; and the magnetic carrier has an adsorbed moisture amount of 0.40 mass % or less when the magnetic carrier is left to stand in an environment of a temperature of 30° C. and a humidity of 80% RH for 72 hours.

Abstract: A magnetic carrier according to the present invention includes a magnetic carrier core and a resin covering layer formed on a surface of the magnetic carrier core, wherein the resin covering layer contains a resin component and an inorganic fine particle, the inorganic fine particle contains an oxide of a typical metal element or a carbonate of a typical metal element, a moisture adsorption rate of the inorganic fine particle when allowed to stand in an environment of a temperature of 30° C. and a humidity of 80% for 72 hours is 25.0% by mass or less, an electrical conductivity of the inorganic fine particle is 2.0×10?9 ?S/m or more and 2.5×10?5 ?S/m or less, and a degree of crystallinity of the inorganic fine particle is 60% or less.

Abstract: There is provided a magnetic carrier having a resin coating layer formed on the surface of each of particles prepared by putting resin in the pores of porous magnetic particles, wherein (i) the surface roughness Ra of the porous magnetic particles ranges from 0.180 ?m to 0.250 ?m, (ii) the pore size ranges from 0.40 ?m to 1.00 ?m, (iii) the amount of the resin held in the pores ranges from 3.0 parts by mass to 5.5 parts by mass relative to 100 parts by mass of the porous magnetic particles, (iv) the amount of resin used for forming the coating resin layer ranges from 1.0 parts by mass to 3.0 parts by mass relative to 100 parts by mass of the porous magnetic particles, and (v) the surface roughness Ra of the magnetic carrier ranges from 0.160 ?m to 0.220 ?m.

Abstract: The present invention is a magnetic carrier that has a magnetic carrier core and a resin coat layer, wherein the resin coat layer contains a coat resin A and a coat resin B, the coat resin A is a polymer obtained by polymerization of a (meth)acrylate ester monomer that has an alicyclic hydrocarbon group, the coat resin B is a polymer obtained by polymerization of (meth)acrylic monomer and has a polar group and an acid value of 4.0 to 50.0 mg KOH/g, the content of the coat resin A is 10 to 90 mass %, the content of the coat resin B is 10 to 90 mass %, and an acid value of the resin component in the resin coat layer is 1.0 to 10.0 mg KOH/g.

Abstract: Provided is a magnetic carrier, including magnetic carrier particles each including: a magnetic carrier core including a magnetic material and a resin; and a resin coating layer formed on a surface of the magnetic carrier core, in which: the resin included in the magnetic carrier core has a hydroxy group; a surface portion of the magnetic carrier core includes a specific compound; and the magnetic carrier has an adsorbed moisture amount of 0.40 mass % or less when the magnetic carrier is left to stand in an environment of a temperature of 30° C. and a humidity of 80% RH for 72 hours.

Abstract: A magnetic carrier contains a resin-filled magnetic core particle and a resin covering layer provided on a surface of the resin-filled magnetic core particle. The resin-filled magnetic core particle is a porous magnetic particle containing a resin in pores thereof. The magnetic carrier has a 50% particle diameter (D50) of 30.0 ?m or more and 80.0 ?m or less on a volume basis. An electric current flowing through the magnetic carrier at a voltage of 500 V ranges from 8.0 to 50.0 ?A. A proportion JR1 of a composition that is made up of the resin in a magnetic carrier portion of a region R1 and a proportion JR2 of the composition in a magnetic carrier portion of a region R2 satisfy the following relationship. The region R1 and the region R2 are illustrated in FIG. 1. 1.20?JR2/JR1?2.

Abstract: There is provided a magnetic carrier having a resin coating layer formed on the surface of each of particles prepared by putting resin in the pores of porous magnetic particles, wherein (i) the surface roughness Ra of the porous magnetic particles ranges from 0.180 ?m to 0.250 ?m, (ii) the pore size ranges from 0.40 ?m to 1.00 ?m, (iii) the amount of the resin held in the pores ranges from 3.0 parts by mass to 5.5 parts by mass relative to 100 parts by mass of the porous magnetic particles, (iv) the amount of resin used for forming the coating resin layer ranges from 1.0 parts by mass to 3.0 parts by mass relative to 100 parts by mass of the porous magnetic particles, and (v) the surface roughness Ra of the magnetic carrier ranges from 0.160 ?m to 0.220 ?m.

Abstract: A magnetic carrier includes resin-filled magnetic core particles including porous magnetic particles whose pores are filled with a resin, and resin coating layers on the surfaces of the resin-filled magnetic core particles. The porous magnetic particles have specific electrical properties.