Abstract: A polyester resin composition having improved transparency, flame retardancy and hardness, and a method for preparation thereof are provided. The composition includes organo-modified nanoclay and a phosphorous-based flame retardant added to a polyester resin. The nanoclay is homogeneously dispersed in the polyester by melt compounding.

Abstract: A multi-color inkjet ink set includes a first ink composition including a first colorant and a heterocyclic amine compound, and a second ink composition include a second colorant having an, in which the acid moiety of the second colorant within the second ink composition reacts with the heterocyclic amine compound within the first ink composition to form a precipitate to prevent the second colorant from moving on a printing medium.

Abstract: A self-dispersible metal complex colorant is represented by formula 1, which has improved storage stability, may embody various colors and has improved fastness, such as light resistance, water resistance and the like: wherein each of A1 and A2 is independently a moiety which includes a substituted or unsubstituted C2-C30 alkenylene group having at least one double bond and is conjugated with an azo group; each of X1 and X2 is selected from the group consisting of a hydroxy group, a C1-C4 alkoxy group, a carboxyl group, and a substituted or unsubstituted amino group; M is a polyvalent transition metal; L is a neutral or anionic ligand; T is a mono- or poly-substituted hydrophilic functional group; n is an integer between 1 and 3; and J is a linker. The self-dispersible metal complex colorant may be used in various fields employing colors, such as fibers, foods, drugs, cosmetics, coatings, inks or ceramics.

Abstract: An ink composition having a high optical density, can implement a clear color image and improve the durability of printed images, such as waterproofness, lightfastness, gasfastness, environmental resistance, etc., having excellent storage stability, and does not cause clogging of nozzles of a cartridge of an inkjet printer even after being stored for a long-term. An inkjet printer cartridge including the ink composition, and an inkjet recording apparatus including the cartridge.

Abstract: An inkjet ink composition includes a colorant, water, and a dicyanobenzene-based compound, and an ink set including the same.

Abstract: An inkjet ink composition including about 100 parts by weight of a liquid vehicle (such as water), about 1 to about 35 parts by weight of a colorant including first and second dyes, and about 0.1 to about 130 parts by weight of an organic solvent, and a weight of the first dye soluble in 100 parts by weight of water under standard state conditions is more than 1.5 times an initial weight of the first dye contained in 100 parts by weight of the inkjet ink composition and a weight of the second dye soluble in 100 parts by weight of water under the standard state conditions is less than 1.5 times an initial weight of the second dye contained in 100 parts by weight of the inkjet ink composition; and a multi-color inkjet ink set including the inkjet ink composition.

Abstract: An ink set, an inkjet recording apparatus including the ink set, and a method of forming an image using the ink set include a black ink composition comprising a first colorant, water, and a first alkyl ether and a color ink composition comprising a second colorant, water, and a second alkyl ether, wherein an amount of the first alkyl ether based on 100 parts by weight of the black ink composition is at most twice an amount of the second alkyl ether based on 100 parts by weight of the color ink composition. When using the ink set, an image of effective quality may be formed which has a reduced bleeding without decreasing an image density.

Abstract: A metal complex colorant represented by formula 1 may embody various colors and has improved fastness, such as light resistance, water resistance and the like: wherein each of A1 and A2 is independently a moiety which includes a substituted or unsubstituted C2-C30 alkenylene group having at least one double bond and is conjugated with an azo group; each of X1 and X2 is selected from the group consisting of a hydroxy group, a C1-C4 alkoxy group, a carboxyl group, and a substituted or unsubstituted amino group; M is a polyvalent transition metal; L is a neutral or anionic ligand; n is an integer from 1 to 3; and J is a linker. The metal complex colorant may be used in various fields employing colors, such as fibers, foods, drugs, cosmetics, coatings, inks or ceramics.

Abstract: A 2-methoxyphenol derivative and an ink composition containing the 2-methoxyphenol derivative, an aqueous medium, and a colorant enhance light resistance by absorbing ultraviolet (UV) light, provide wettability and stabilize a colorant. The ink composition prepared using the 2-methoxyphenol derivative also has improved light resistance, wettability and stabilizes a colorant and does not require an additional light-resistant agent.

Abstract: A 2-methoxyphenol derivative may be used as an ultraviolet (UV) light absorbing dispersant and, an ink composition may include the 2-methoxyphenol derivative as a light-resistant dispersant. The 2-methoxyphenol derivative absorbs UV light and thus provides light resistance to outputs. The 2-methooxyphenol derivative also improves dispersibility. When the 2-methoxyphenol derivative is used to prepare an ink composition, the ink composition has improved dispersibility and light resistance, and there is no need to add a light-resistant additive.

Abstract: An inkjet ink composition including about 100 parts by weight of a liquid vehicle (such as water), about 1 to about 35 parts by weight of a colorant including first and second dyes, and about 0.1 to about 130 parts by weight of an organic solvent, and a weight of the first dye soluble in 100 parts by weight of water under standard state conditions is more than 1.5 times an initial weight of the first dye contained in 100 parts by weight of the inkjet ink composition and a weight of the second dye soluble in 100 parts by weight of water under the standard state conditions is less than 1.5 times an initial weight of the second dye contained in 100 parts by weight of the inkjet ink composition; and a multi-color inkjet ink set including the inkjet ink composition.

Abstract: A multi-color inkjet ink set includes a first ink composition including a first colorant and a heterocyclic amine compound, and a second ink composition include a second colorant having an, in which the acid moiety of the second colorant within the second ink composition reacts with the heterocyclic amine compound within the first ink composition to form a precipitate to prevent the second colorant from moving on a printing medium.

Abstract: An inkjet ink composition, an inkjet printer cartridge including the ink composition and an inkjet recording apparatus including the ink cartridge including the ink composition, the inkjet ink composition including a colorant, water, and an additive, the additive including at least one media-philic additive in an amount in a range of about 0.1 to about 35 parts by weight based on 100 parts by weight of the ink composition, and an amount of the media-phobic additive is in a range of about 1 to about 25 parts by weight based on 100 parts by weight of the ink composition.

Abstract: A lightfast colorant and a lightfast ink composition including the lightfast colorant utilize a lightfast colorant that is derived by covalently binding a cinnamate derivative and a conventional colorant. The lightfast colorant improves storage stability as well as lightfastness when added to an ink composition.

Abstract: A benzophenone compound, and an ink composition that includes the benzophenone compound can absorb UV light, and thus improve lightfastness of images produced with the ink composition containing the compound. Due to the function of the benzophenone compound as a lightfast dispersant, the dispersibility and the lightfastness of an ink composition are improved with the benzophenone compound, without requiring an additional lightfastness enhancer.

Abstract: An ink composition having a high optical density, can implement a clear color image and improve the durability of printed images, such as waterproofness, lighffastness, gasfastness, environmental resistance, etc., having excellent storage stability, and does not cause clogging of nozzles of a cartridge of an inkjet printer even after being stored for a long-term. An inkjet printer cartridge including the ink composition, and an inkjet recording apparatus including the cartridge.

Abstract: A lightfast additive and an ink composition including the same include a benzophenone moiety for lightfastness and a moiety for wettability and the ability to stabilize a colorant, wherein the two moieties are covalently bonded. The lightfast additive may exhibit effective ultraviolet (UV) light absorption capacity, effective wettability, and an ability to stabilize a colorant. The ink composition utilizing the light fast additive thus has an improved lightfastness and long-term storage stability.

Abstract: A lightfast colorant and a lightfast ink composition include a lightfast colorant that is derived by covalently binding a benzophenone derivative and a conventional colorant and that imparts effective lightfastness and long-term storage stability to an ink composition that is prepared with the same.

Abstract: A water-soluble, antimicrobial active polymer and an ink composition are prepared by coupling an antimicrobial active compound to a branch of polyvinylalcohol. An excellent antimicrobial effect is provided without affecting the properties of the ink composition that includes the polymer. The polymer is added to the ink composition in an amount of 1 to 10 parts by weight based on 100 parts by weight of the ink composition. The ink composition provides extended storage stability due to no coagulation, effective antimicrobial effect even in a printed picture, and no irritation to human skin.

Abstract: An ink composition comprising a coloring agent, a surfactant, a liquid vehicle, and a co-solvent comprising a hetero atom having at least one unshared electron pair; an ink jet printing apparatus containing the ink composition, and a printing process using the ink composition.