| 发明名称 | Ink, ink cartridge and ink jet recording method | ||
| 摘要 | The invention provides an ink containing a polyurethane polymer which has units respectively derived from a polyisocyanate, a polyether polyol having no acid group and a diol having an acid group and has an acid value of 40 mg KOH/g or more and 140 mg KOH/g or less, a carbon black and at least one antioxidant selected from compounds represented by the general formulae (1) to (3). | ||
| 申请公布号 | US9452608(B2) | 申请公布日期 | 2016.09.27 |
| 申请号 | US201313860940 | 申请日期 | 2013.04.11 |
| 申请人 | Canon Kabushiki Kaisha | 发明人 | Okamura Daiji;Yamasaki Kousuke;Shiiba Kenichi |
| 分类号 | C09D175/00;B41J2/175;C09D11/324;C09D11/38;B41J2/05 | 主分类号 | C09D175/00 |
| 代理机构 | Fitzpatrick, Cella, Harper & Scinto | 代理人 | Fitzpatrick, Cella, Harper & Scinto |
| 主权项 | 1. An ink comprising: a polyurethane polymer that has units respectively derived from a polyisocyanate, a polyether polyol having no acid group, and a diol having an acid group, and has an acid value of from 40 mg KOH/g to 140 mg KOH/g, the polyurethane polymer having a non-crosslinked structure; a carbon black; and at least one antioxidant selected from the group consisting of a compound represented by the following general formula (1), a compound represented by the following general formula (2) and a compound represented by the following general formula (3):wherein R1 is an alkyl group having 1 to 20 carbon atoms;wherein R2 is a methylene group or an ethylene group; andwherein R3 is an alkyl group having 1 to 16 carbon atoms. | ||
| 地址 | Tokyo JP | ||