Patent ID: 8071268

Claim:
A toner for electrophotography comprising a resin binder, a colorant, and a clay-organic complex obtained by intercalating into a smectite clay a quaternary ammonium salt represented by the formula (A): [(R 1 ) 3 (R 2 )N] + .X âˆ’ (A) wherein R 1 and R 2 are not identical; R 1 is an alkyl group, alkenyl group, or alkynyl group, each having 4 to 24 carbon atoms; R 2 is an alkyl group, alkenyl group, or alkynyl group, each having 1 to 10 carbon atoms; and X âˆ’ is an anion, wherein the resin binder comprises a crystalline polyester and an amorphous polyester, and wherein the crystalline polyester resin is a resin obtained by polycondensing an alcohol component comprising an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component comprising fumaric acid.