| 摘要 |
PURPOSE: An anionic electrodepositing paint composition is provided, which shortens the manufacturing time and improves yield without affecting high permeability, heat-proof property, chemical-resistance and liquid crystal pixel. And a using method thereof is also provided. CONSTITUTION: The anionic electrodepositing paint composition comprises: (i) 10-15 wt.% of an acrylate copolymer which has a number average molecular weight of 3,000-300,000 and a dielectric constant of 3.0-6.0 in a dried film of paint thickness of 1-2.5 micrometer; (ii) 1-5 wt.% of a paint which is selected from anthraquinone paint and phthalocyanine paint and has an average particle diameter of 20-150 nanometers; (iii) 1-3 wt.% of a melamine typed hardening agent for electrodeposition; (iv) 1-5 wt.% of an organic solvent; (v) 0.5-1 mol of amine per 1 mol of carboxyl group; and (vi) the remaining amount of distilled water. In the composition, the acrylate copolymer is prepared by reacting: (a) 0.5-30 wt.% of a carboxylic acid which is selected from the group consisting of acrylic acid, methacrylic acid and maleic acid; (b) 0.5-30 wt.% of a reaction product which is represented by the formula (1) and prepared by reacting a glycidyl acrylate or a glycidyl methacylate with a quaternary ammonium salt; (c) 10-40 wt.% of a monomer which has at least one hydroxy group and is selected from the group consisting of C2-5 hydroxy alkyl acrylate and C2-5 hydroxy alkyl methacrylate; and (d) 10-70 wt.% of at least one unsaturated monomer which is selected from the group consisting of C2-5 alkyl acrylate and C2-5 alkyl methacrylate. In the formula (1), each R1 and R2 is hydrogen or C1-2 alkyl group; R3 is C1-2 alkyl group or hydroxy alkyl group, and R4 is C1-3 alkanoate. The cationic electrodepositing paint composition is used for directly forming pixels on a transparent electrode layer of a thin film transistor base plate by using an electrodeposition method of impressing 3-100 direct current voltage for 3-300 seconds thereon. |
