Abstract: A high optical density, i.e., .gtoreq.3.0, at 1 micron or less film thickness, black matrix is disclosed having improved stability and shelf life as a consequence of admixing Pigment Black 7 and organic dye or dye mixtures on a polyimide polymer vehicle.

Abstract: A product obtained by reacting a sulfonated amino resin and an amino group-containing substance in a weight ratio of from 1:0.05 to 1:3.

Abstract: A process for producing a stable acidic aqueous alumina sol containing 50 to 300 nm of elongate secondary particles which are elongated in only one plane and formed by edge-to-edge coagulation of rectangular plate-like primary particles having a length of one side of 10 to 30 nm when observed through an electron microscope, the process comprises the steps of:(A) adding an alkali to an aqueous alumina sol containing fibrous colloidal particles of an amorphous alumina hydrate to produce a reaction mixture having a pH of 9 to 12,(B) subjecting the reaction mixture obtained in the step (A) to a hydrothermal treatment at a temperature of 110 to 250.degree. C. to produce an aqueous suspension containing an alumina hydrate having a boehmite structure, and(C) desalting the aqueous suspension obtained in the step (B) by adding water and an acid by ultrafiltration to form an acidic aqueous alumina sol having a pH of 3 to 6.

Abstract: An organic black matrix having high resistivity (.gtoreq.10.sup.11 ohm/square), high optical density (.gtoreq.2.0) at ultra thin film thicknesses (.ltoreq.1.0 microns) for improved STN and TFT pixel display applications is made possible by combining polyimide/dye solutions and mixed metal oxide pigment dispersions at a weight/weight ratio of dye to pigment of 1:15 to 3:15. The need for low resistivity carbon black, as a replacement for sputtered chrome, is negated.

Abstract: Disclosed is an inorganic adhesive composition comprising (a) an aqueous silica sol and (b) an inorganic refractory powder along with one or more materials selected from (c) a fine powdery silica, (d) an aqueous alkali silicate solution and (e) a silane coupling agent. After hardening, the hardened product of the composition displays noticeably improved adhesion strength and electric insulating property.

Abstract: Disclosed is an inorganic adhesive composition comprising (a) an aqueous silica sol and (b) an inorganic refractory powder along with one or more material selected from (c) a fine powdery silica, (d) an aqueous alkali silicate solution and (e) a silane coupling agent. After hardening, the hardened product of the composition displays noticeably improved adhesion strength and electric insulating property.