摘要:
The invention provides a black pigment composition capable of overcoming the drawbacks of carbon black pigments, which, when used as a toner colorant in particular, is able to reduce color shading over time and improve image qualities through an improvement in charging performances such as charge leakage and the like. The invention also provides a chromatic pigment composition able to reduce and correct the tinge of a carbon black pigment while improving fading stability, when the composition is added to a carbon black composition for electrophotographic toners. The black pigment composition contains, as essential pigments, a pigment P1 having a maximum absorption wavelength λ max (nm) within the range of 460 ≤λ max ≤ 530 and a half-value wavelength (long wavelength side) of the absorption spectrum of 550 nm or more, and a pigment P2 having a maximum absorption wavelength λ max (nm) within the range of 600 ≤ λ max ≤ 700, as measured in the form of a dispersion in a solvent (methyl ethyl ketone).
摘要:
Provided are a method of producing a compound having a colorant structure suitable for a pigment dispersant, and a pigment dispersant, a pigment composition, a pigment dispersion, and a toner each containing the compound. The production method is a method of producing a compound in which a polymer portion and a colorant portion are bonded to each other through a linking group, the method including the steps of: (a) polymerizing a vinyl-based polymerizable monomer represented by the formula (A) with a radical initiator having a protective group by living radical polymerization to provide a polymer having the protective group at a terminal thereof; (b) hydrolyzing the protective group of the polymer having the protective group at a terminal thereof obtained by the step (a) to deprotect the polymer; and (c) bonding the deprotected polymer obtained by the step (b) and a colorant to each other through a covalent bond.
摘要:
To provide a method for producing a compound that enhances dispersibility of a pigment of respective colors in a water-insoluble solvent, as well as a pigment dispersant, and a pigment composition, a pigment dispersion and a toner having a good tinting power. A method for producing a compound, including the following: (i): subjecting a polymerizable monomer forming a monomer unit represented by formula (1) to radical polymerization in the presence of a radical polymerization initiator and an iodine molecule to provide a polymer; and (ii) : binding a colorant to a terminal of a main chain of the polymer:
wherein R 1 represents a hydrogen atom and an alkyl group, and R 2 represents a phenyl group, a carboxyl group, an alkoxycarbonyl group or a carboxamide group.
摘要翻译:一种用于制造化合物的方法做的respectivement颜色在水不溶性溶剂中的颜料,以及作为颜料分散剂和颜料组合物,颜料分散体和具有良好的着色力的调色剂的增强的分散性。 一种生产化合物,其中包括下列方法:(i)使可聚合的单体形成由下式表示的单体单元(1)在自由基聚合引发剂的和碘分子的存在自由基聚合以提供聚合物; 和(ii):着色剂结合到聚合物的主链的末端:worin R 1表示与烷基的氢原子,和R 2表示苯基,羧基,在烷氧基羰基或羧酰胺基 ,
摘要:
An object of the invention is to provide a novel compound having a multimer structure of a specific xanthene derivative which is capable of providing a printed matter having further improved in performances concerning image fastness such as ozone resistance, light fastness and the like. A compound represented by formula (1): in formula (1), L represents a divalent to tetravalent linking group; D represents a residue obtained by removing 1 to 5 hydrogen atoms from a compound represented by formula (2); m represents an integer of 1 to 10, however, each L may be the same with or different from every other L; n represents an integer of 2 to 10, however, each D may be the same with or different from every other D; and in formula (2), each of R 4 to R 24 independently represents a hydrogen atom or a substituent, provided that formula (2) has at least one or more ionic hydrophilic groups.
摘要:
A toner, including: a binder resin; and a colorant, wherein the toner has a storage modulus of 1.0 x 10 7 Pa or more at 50°C, a loss modulus of 8.0 x 10 4 Pa to 2.0 x 10 5 Pa at 80°C, and a loss modulus of 2.0 x 10 2 Pa to 1.0 x 10 3 Pa at 160°C.