发明名称 |
Binder for ink-jet printing ink, ink-jet printing ink containing the same, and printed matter |
摘要 |
It is an object of the present invention to provide a binder for ink-jet printing ink that can form printed images having excellent scratch resistance and good alcohol resistance without impairing good discharge stability of ink. The present invention relates to a binder for ink-jet printing ink including a polyurethane (A) that has a hydroxyl group at a molecular terminal, has a weight-average molecular weight of 30,000 to 70,000, and is obtained by causing a reaction of a polyisocyanate and a polyol (a2) containing a particular polyether polyol so that the equivalent ratio [isocyanate group [X]/hydroxyl group [Y]] of an isocyanate group [X] in the polyisocyanate (a1) to a hydroxyl group [Y] in the polyol (a2) is in the range of 0.930 to 0.995 and an aqueous medium (B). The hydroxyl group present at the molecular terminal of the polyurethane (A) is a hydroxyl group derived from the polyether polyol. |
申请公布号 |
US8841357(B2) |
申请公布日期 |
2014.09.23 |
申请号 |
US201214009235 |
申请日期 |
2012.01.31 |
申请人 |
DIC Corporation |
发明人 |
Nagahama Sadamu;Kitada Mitsuru |
分类号 |
C09D11/30;C09D11/00;C08G18/75;C08G18/08;C08G18/12;C09D11/322;B41J2/01;C08G18/48;C09D175/04 |
主分类号 |
C09D11/30 |
代理机构 |
McDermott Will & Emery LLP |
代理人 |
McDermott Will & Emery LLP |
主权项 |
1. A binder for ink-jet printing ink, comprising:
a polyurethane (A) that has a hydroxyl group at a molecular terminal, has a weight-average molecular weight of 30,000 to 70,000, and is obtained by preparing a urethane prepolymer having an isocyanate group at a molecular terminal through a reaction of a polyisocyanate (a1) and part of a polyol (a2) and then causing a reaction of the urethane prepolymer and the polyether polyol (a2-1); and an aqueous medium (B),wherein:
the hydroxyl group present at the molecular terminal of the polyurethane (A) is a hydroxyl group derived from the polyether polyol (a2-1); the equivalent ratio of an isocyanate group [X] in the polyisocyanate (a1) to a hydroxyl group [Y] in the polyol (a2), isocyanate group [X]/hydroxyl group [Y], is in the range of 0.930 to 0.995; and the polyol (a2) contains the polyether polyol (a2-1), which is represented by general formula [I]:where R represents an alkylene group having 3 to 8 carbon atoms, and n is an average number of addition moles of a structural unit RO, n being in the range of 8 to 55. |
地址 |
Tokyo JP |