6 results about "ETHYL PYRROLIDONE" patented technology

A method for producing a maleimide resin, the maleimide resin being a maleimide resin obtained by reacting a tetracarboxylic dianhydride (a1), an amine (a2), and maleic anhydride (a3), the method for producing the maleimide resin comprising the steps of: obtaining a polyimide resin by adding the amine (a2) to the tetracarboxylic dianhydride (a1) in the presence of an organic solvent; and obtaining the maleimide resin by adding the maleic anhydride (a3) to the polyimide resin, the organic solvent containing at least one of gamma-butyrolactone and N-ethyl-2-pyrrolidone, the amine (a2) containing a dimer diamine and a second amine other than the dimer diamine.

The purpose of the present invention is to provide a photosensitive resin composition, a method for producing a cured film, and a method for producing a cured relief pattern, the photosensitive resin composition having excellent resolution even when a polymer having high absorbance such as a high glass transition temperature (Tg) is imparted thereto, and having reduced copper voids when in contact with copper. [Solution] A photosensitive resin composition comprising: (A) a polymer which is (A1) a soluble polyimide or (A2) a polyimide precursor; (B) a photopolymerization initiator; the solvent is N-ethyl-2-pyrrolidone; (E) a photopolymerizable unsaturated monomer; and (X) at least one substance selected from the group consisting of toluene, xylene, tetrahydrofuran, gamma-butyrolactone, and gamma-valerolactone, the content of the (X) being 1 ppm or more and 10000 ppm or less relative to the total mass of the photosensitive resin composition.

The invention belongs to the technical field of printing, and particularly relates to water-based pigment ink for a TIJ type ink-jet printer, and the water-based pigment ink comprises the following components: pigment color paste, N-ethyl pyrrolidone, a water-soluble organic solvent, an alkyne diol surfactant, a wetting agent consisting of acetylene ethanol and acetylene diol, and the balance of water. Compared with the prior art, the water-based pigment black ink keeps a long-time standby state in a printer nozzle without drying the nozzle, the cover opening time of an ink-jet printer is 2 hours or more, the ink can continuously print without blocking the nozzle, meanwhile, the ink is good in fluency and compatibility, and the service life of the ink-jet printer nozzle is longer than that of common ink.

The invention relates to a photosensitive resin composition and a method for manufacturing a cured relief pattern. [Problem] The purpose of the present invention is to provide: a photosensitive resin composition which has excellent chemical resistance, exhibits good elongation even when the curing temperature is low, and is capable of producing a cured relief pattern having good adhesion to copper wiring; and a method for producing a cured relief pattern using the photosensitive resin composition. [Solution] The present invention provides a photosensitive resin composition containing (A) a soluble polyimide, (B) a photopolymerization initiator, and (C) an organic solvent, in which N-ethyl-2-pyrrolidone is contained in an amount of 40% by mass or more based on the total mass of the (C) organic solvent, and an organic solvent having a boiling point of less than 140 DEG C is contained in an amount of 20% by mass or less.

The invention relates to a liquid crystal aligning agent, a liquid crystal alignment film, and a liquid crystal display element. Provided are a liquid crystal aligning agent, a liquid crystal aligning film, and a liquid crystal display element which are capable of suppressing poor coating of an aligning film and non-uniformity of display of a liquid crystal display element due to the influence of a wiring structure or C / H, and which are capable of reducing viscosity while maintaining a resin component and a molecular weight. A liquid crystal aligning agent containing: at least one polymer selected from the group consisting of polyimide precursors and polyimides that are imides thereof; and a solvent containing a solvent A, a solvent B, and a solvent C. Solvent A: is selected from the group consisting of N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, [gamma]-butyrolactone, and dimethylimidazolinone. The solvent B is dipropylene glycol dimethyl ether. Solvent C: selected from the group consisting of diethylene glycol diethyl ether and diacetone alcohol.