| 摘要 |
<p>PURPOSE:To improve spectral reflecting characteristic, spectral transmitting characteristic and charging characteristic by using specified polyester resin and polymer containing an acrylamide monomer as a binder resin and a negative charge control agent, respectively. CONSTITUTION:A binder resin containing, as a main component, a polyester resin obtained by co-condensation polymerization of a diol component represented by a formula I, a divalent carboxylic acid or its acid anhydride or lower alkyl ester, and a trivalent or more polyhydric carboxylic acid or its acid anhydride or lower alkyl ester or a trivalent or more polyhydric alcohol, in which the value of OHV/AV is 1.2 or more when the acid value of the polyester resin is AV and the hydroxy group value is OHV, a polymer containing an acrylamide monomer represented by the formula II as a negative charge control agent, and a coloring agent are contained. In the formtulae I, II, R represents a lower alkylene group, (x) and (y) each represent an integral number of 1 or more, wherein the average valve of x+y is 2-7, R<1> represents hydrogen atom, R<20> is a divalent hydrocarbon group.</p> |
