Patent ID: 8481239
Filing Date: 2013-07-09
Classification: G03G

Abstract:
1. A carrier, comprising: a magnetic particulate core material; and a resin layer overlying the magnetic particulate core material, wherein the resin layer comprises a resin obtained by heat treatment of a copolymer comprising a site derived from a monomer component having the following formula (1) and a site derived from a monomer component having the following formula (2), and wherein the resin layer comprises a cross-linked material obtained by hydrolysis of the copolymer to produce a silanol group and condensation using an organotitanium compound: wherein R 1 represents a hydrogen atom or a methyl group; m is an integer of 1 to 8; 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 alkoxy group having 1 to 4 carbon atoms; X represents 10 to 90 mol %; and Y represents 10 to 90 mol %.