Patent ID: 8211610

Claim:
A carrier comprising: a particulate core material having magnetism; and a resin layer located on a surface of the particulate core material, wherein the resin layer is prepared by forming a layer including a copolymer on the surface of the particulate core material and then subjecting the layer to a heat treatment to crosslink the layer, wherein the copolymer has the following formula (I): wherein R 1 represents a hydrogen atom or a methyl group; (CH 2 ) m represents an alkylene group having 1 to 8 carbon atoms; R 2 represents an alkyl group having 1 to 4 carbon atoms; R 3 represents an alkyl group having 1 to 8 carbon atoms or an alkoxyl group having 1 to 4 carbon atoms; X represents a content of a first unit and ranges from 10% by mole to 40% by mole; Y represents a content of a second unit and ranges from 10% by mole to 40% by mole; and Z represents a content of a third unit and ranges from 30% by mole to 80% by mole, wherein 60% by mole <Y+Z<90% by mole.