Patent ID: 7351510

Claim:
A toner for electrophotography, comprising: a low-softening point polyester-based resin having a softening point of from 80° to 120° C.; and a high-softening point polyester-based resin having a softening point of higher than 120° C. and 160° C. or lower, wherein (i) the low-softening point polyester-based resin is a linear polyester-based resin comprising from 1 to 30% by mol of reacted units of a dodecenyl substituted succinic acid compound, (ii) the low-softening point polyester-based resin has a viscosity at 160° C. of from 500 to 10000 Pa·s, and a ratio of viscosity at 140° C. to viscosity at 180° C. is 10 or less, and wherein a weight ratio of the low-softening point polyester-based resin to the high-softening point polyester-based resin is from 20/80 to 90/10, wherein the low-softening point polyester-based resin comprises reacted units of dodecenyl succinic anhydride. terephthalic acid, polyoxypropylene(2.2)-2,2-bis(4-hydroxyphenyl)propane and polyoxyethylene(2.2)-2,2-bis(4-hydroxyphenyl)propane.