TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE, AND IMAGING DEVICE USING THE SAME
申请人:Ricoh Company, Ltd.
公开号:EP1995639A1
公开(公告)日:2008-11-26
Provided is an electrostatic image developing toner excellent in blocking resistance at high temperature and humidity, as well as in low temperature-fixing property, having a polyester resin toner binder. Provided is the electrostatic image developing toner containing at least one noncrystalline polyester resin and a crystalline polyester resin, wherein the polyester resins are formed in the presence of at least one titanium-containing catalyst expressed in the following Formulas:
Ti(-X)m(-OH)n
O=Ti(-X)p(-OR)q
where X is a residue resulting from removing an H atom in one hydroxyl group from (poly)alkanolamine having 2 to 12 carbon atoms, R represents an H atom or an alkyl group that has 1 to 8 carbon atoms and may contain 1 to 3 ether bonds, m, n, p, and q are integers; m, n, p, and q are 1-4, 0-3, 1-2, 0-1,respectively; and the sum of m and n, and p and q are 4 and 2, respectively.
本发明提供了一种具有聚酯树脂墨粉粘合剂的静电图像显影墨粉,该墨粉在高温和高湿条件下具有优异的抗阻塞性能和低温固着性能。本发明提供的静电图像显影调色剂含有至少一种非结晶聚酯树脂和一种结晶聚酯树脂,其中聚酯树脂是在至少一种含钛催化剂存在下形成的,其表达式如下:
Ti(-X)m(-OH)n
O=Ti(-X)p(-OR)q
其中,X 为从具有 2 至 12 个碳原子的(多)烷醇胺中去掉一个羟基中的一个 H 原子后的残余物,R 代表 H 原子或具有 1 至 8 个碳原子并可含有 1 至 3 个醚键的烷基,m、n、p 和 q 为整数;m、n、p 和 q 分别为 1-4、0-3、1-2、0-1;m 和 n 以及 p 和 q 的和分别为 4 和 2。