A printing formulation, an electronic device comprising a function layer prepared from the printing formulation and a preparation method for obtaining a functional material thin film by utilizing the printing formulation. The printing formulation comprises at least one functional material and at least one inorganic ester solvent, and the inorganic ester solvent can be selected from alkyl borate or alkyl phosphate.

The present invention relates to a water-based ink that contains pigment-containing polyester-based resin particles A, pigment-free polyester-based resin particles B, an organic solvent and water, in which a content of an organic solvent C having a boiling point of not higher than 235 C. in a whole amount of the organic solvent is not less than 90% by mass. The water-based ink of the present invention can be improved in rub fastness, solvent resistance and adhesion to a non-water absorbing printing medium with good balance therebetween, even when printed on the non-water absorbing printing medium.

An object of the present invention is to provide a composition for sintering capable of suppressing a crack from occurring in a wiring after sintering. Provided is the composition for sintering including silver nanoparticles, an organic dispersant for coating the silver nanoparticles, and a solvent. When the composition for sintering is heated, a weight loss rate in a range of 260 C. to 600 C. is 2.92% or less.

An ink composition includes water, a resin, a coloring material, an alcohol (A) and a solvent (B). The alcohol (A) has a vapor pressure at 25 C. of 0.050 mmHg or greater and a solubility at 25 C. in 100 g of water of less than 3 g. The solvent (B) includes at least one selected from the group consisting of glycol ethers having a vapor pressure at 25 C. of less than 0.050 mmHg and a solubility at 25 C. in 100 g of water of 3 g or greater and alkanediols having a vapor pressure at 25 C. of less than 0.050 mmHg and a solubility at 25 C. in 100 g of water of 3 g or greater.

An ink composition includes water, a resin, a coloring material, an alcohol (A) and a solvent (B). The alcohol (A) has a vapor pressure at 25 C. of 0.050 mmHg or greater and a solubility at 25 C. in 100 g of water of less than 3 g. The solvent (B) includes at least one selected from the group consisting of glycol ethers having a vapor pressure at 25 C. of less than 0.050 mmHg and a solubility at 25 C. in 100 g of water of 3 g or greater and alkanediols having a vapor pressure at 25 C. of less than 0.050 mmHg and a solubility at 25 C. in 100 g of water of 3 g or greater.

Aqueous particle-free fluids can be used in inkjet printing methods including continuous inkjet printing processes. Each of these fluids has a dynamic viscosity of less than or equal to 5 centipoise (5 mPa-sec) at 25 C., and each consists essentially of: a composition consisting of one or more compounds represented by the following Structure (I):

HOCH.sub.2CH.sub.2R(I)

wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, in a total amount of at least 0.5 weight % and up to and including 2 weight %, based on the total weight of the aqueous inkjet ink composition. Such aqueous particle-free fluids can be used as replenishment or printhead maintenance fluids. Two or more of such aqueous particle-free fluids can be packaged, sold, and use as part of fluid sets.

Aqueous particle-free fluids can be used in inkjet printing methods including continuous inkjet printing processes. Each of these fluids has a dynamic viscosity of less than or equal to 5 centipoise (5 mPa-sec) at 25 C., and each consists essentially of: a composition consisting of one or more compounds represented by the following Structure (I):

HOCH.sub.2CH.sub.2R(I)

wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, in a total amount of at least 0.5 weight % and up to and including 2 weight %, based on the total weight of the aqueous inkjet ink composition. Such aqueous particle-free fluids can be used as replenishment or printhead maintenance fluids. Two or more of such aqueous particle-free fluids can be packaged, sold, and use as part of fluid sets.

An ink jet ink includes water, a water-soluble organic solvent, a resin, and an anionic heptamethine cyanine dye including a substituted or unsubstituted five or six membered ring in the heptamethine chain, the dye having a maximum absorption between 800 and 1200 nm to increase drying speed and improve image quality when dried with NIR or CIR dryers.

An ink jet ink includes water, a water-soluble organic solvent, a resin, and an anionic heptamethine cyanine dye including a substituted or unsubstituted five or six membered ring in the heptamethine chain, the dye having a maximum absorption between 800 and 1200 nm to increase drying speed and improve image quality when dried with NIR or CIR dryers.

Provided is an ABA block copolymer that can offer a pigment dispersion composition having excellent dispersion stability when used as a pigment dispersant in an aqueous medium. An ABA block copolymer including: an A block containing a structural unit represented by a general formula (1) below and a structural unit derived from a vinyl monomer with an acid group; and a B block containing a structural unit derived from a vinyl monomer with an aromatic ring group or an alicyclic alkyl group, the ABA block copolymer having an acid value of 30 to 250 mgKOH/g. ##STR00001##
In the general formula (1), R.sup.1 is a hydrogen atom or a methyl group and R.sup.2 is an alkyl group having 2 to 10 carbon atoms.