发明名称 |
Resin composition for toner, toner, developer and image forming apparatus |
摘要 |
A resin composition for a toner including a polyester resin and a colorant, wherein the polyester resin has A(10)-A(180) of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture of 20 parts by mass of the polyester resin added to 80 parts by mass of ethyl acetate and stirred at 25° C. for 10 minutes, and A(180) (%) is the transmittance after the mixture is left to stand for 3 hours. |
申请公布号 |
US9606464(B2) |
申请公布日期 |
2017.03.28 |
申请号 |
US201314409267 |
申请日期 |
2013.06.13 |
申请人 |
Ricoh Company, Ltd. |
发明人 |
Yamauchi Yoshitaka;Suzuki Kazumi;Morita Tatsuya;Yamashita Hiroshi;Sugimoto Tsuyoshi;Asahina Daisuke |
分类号 |
G03G9/00;G03G9/087 |
主分类号 |
G03G9/00 |
代理机构 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
代理人 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
主权项 |
1. A resin composition, comprising:
a polyester resin prepared from monomers comprising an aliphatic alcohol and an aromatic carboxylic acid; and a colorant, wherein the aliphatic alcohol comprises propylene glycol and 1,3-propanediol, where a molar ratio of propylene glycol with respect to a total of propylene glycol and 1,3-propanediol is from 65% to 85%, the aromatic carboxylic acid comprises terephthalic acid, and the polyester resin has a A(10)-A(180) value of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture obtained by adding 20 parts by mass of the polyester resin to 80 parts by mass of ethyl acetate and stirring at 25° C. for 10 minutes, and A(180) (%) is the transmittance after the mixture is left to stand for 3 hours. |
地址 |
Tokyo JP |