Abstract:
The present invention relates to a method for preparing 4,4′-bis(2-benzoxazolyl)stilbene and, more specifically, to a method for economically preparing fluorescent 4,4′-bis(2-benzoxazolyl)stilbene with high purity, which is used as a fluorescent whitening agent useful for almost all plastics and films, such as polyester, polyamide, polyethylene, polycarbonate, acryl, polypropylene, polystyrene, polyvinyl chloride, and acrylonitrile-butadiene-styrene, synthetic fibers, and synthetic rubbers.
Abstract:
PURPOSE: A polyurethane microcapsule rust inhibitor containing a triazole-based compound, a manufacturing method thereof, and a multi-layered membrane with the same are provided to maintain initial performances by restoring product functions from environmental, physical, and chemical attacks itself. CONSTITUTION: A polyurethane microcapsule rust inhibitor (10) containing a triazole-based compound comprises a core material which is the triazole-based compound; and a polyurethane microcapsule containing the core material. The core material and the polyurethane microcapsule are formed of a core-shell structure. The membrane thickness of the polyurethane microcapsule is 5 nm-100 um. The size of the microcapsule is 50 nm-500 um.
Abstract:
PURPOSE: A separator is provided to reduce the ventilation time along with improvement of balanced dispersion and adhesion by preventing tally of coating layer without having no coated area during the coating. CONSTITUTION: A separator comprises porous base material having multiple pores, a porous coating layer including fixing binder, and polyvinylidene fluoride group copolymer and acrylic copolymer. Moreover, the electrochemical device comprises a cathode, an anode, and an interposed separator.