A yellow toner for developing an electrostatic image contains yellow color toner particles having at least a binder resin and a yellow colorant, and an external additive. The binder resin has a polyester resin having an acid value of from 2 mg KOH/g to 25 mg KOH/g and a glass transition temperature of from 52° C. to 65° C. The yellow colorant is a compound represented by the following Formula (I): ##STR1## The external additive is composed of a fine titanium oxide powder or fine aluminum oxide powder subjected to hydrophobic treatment. The powder has an average primary particle diameter of from 0.01 μm to 2 μm. The yellow toner has a weight average particle diameter of from 3.0 μm to 15.0 μm.

Yellow toner for developing electrostatic image, two component developer, image sheet

Provided is an infrared light-reflecting black isoindolinone pigment which has a novel skeleton and has a high degree of blackness (coloring power) and excellent durabilities such as heat resistance. A black isoindolinone pigment which is represented by general formula (1) (wherein each X independently represents a chlorine atom, a bromine atom or an alkyl group and 8 ≥ n + m ≥ 0).

Black isoindolinone pigment and coloring agent

흑색도(착색력)가 높고, 내열성 등의 내구성이 우수한, 신규 골격을 갖는 적외선 반사성의 흑색 이소인돌리논 안료를 제공한다. 하기 일반식 (1)(X는 각각 독립적으로 염소 원자, 브롬 원자, 또는 알킬기를 나타내고, 8≥n+m≥0임)로 표시되는 흑색 이소인돌리논 안료이다.

흑색 이소인돌리논 안료 및 착색제

Provided is an infrared-reflecting black isoindolinone pigment having a novel skeleton, the black isoindolinone pigment having a high blackness (coloring power) and excellent durability such as heat resistance. The black isoindolinone pigment is represented by the following formula (1), wherein each X independently represents a chlorine atom, a bromine atom, or an alkyl group, and 8≥n+m≥0.

Composition of matter containing (a) a compound of the formula I (I) in which A is one of the groups of the formulae +TR in which B is -O-, -S-, -SO2-, -N=N-, -CH2-, -CH=CH-, -CONH-, -NHCONH-, or -CONHNHCO-, Q is -O- or -NH- and Z is -O- or -S- and R and R' are independently of each other hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy or phenoxy, and (b) a compound of the formula II (II) in which A' is as defined above for A, D is hydrogen, amino or a group of the formula III (III) E is -O- or -S-, T1, T2 and T3 independently of one another are chlorine or a group -ET', T' is a group of the formulae X(+) is H(+) or a group of the formulae Mn(+)/n or N beta (R1)(R2)(R3)(R4), Mhu n(+) is an n-valent metal cation, n is 1, 2 or 3, R1, R2, R3 and R4 are independently of one another hydrogen, C1-C18-alkyl, C5-C6-cycloalkyl, unsubstituted or C1-C18-alkyl-substituted phenyl or R3 and R4 together with the N atom form a pyrrolidine, imidazolidine, piperidine, piperazine or morpholine radical, or R2, R3 and R4 together with the N atom form a pyrrole, pyridine, picoline, pyrazine, quinoline or isoquinoline radical and Y is hydrogen, halogen, methyl, methoxy or amino Pigment mixtures of this type, in particular when used in paints, are distinguished in particular by increased tinctorial strength and high luster and especially by improved rheology

Yosuto Fuon Dea Kuroon

Papers

Novel composition based on tetrachloroisoindolinone pigment

Novel composition based on isoindoline pigment