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:
본 발명은 분자 크기가 큰 디시클로펜타디엔다이머를 과산화수소의 존재 하에 액상 산화에 의한 에폭시화 반응으로 디시클로펜타디엔다이머 에폭시 화합물을 제조하는 과정에서 사용되어 디시클로펜타디엔다이머에 대한 고선택도 및 높은 전환율을 나타냄으로써 디시클로펜타디엔다이머 에폭시 화합물을 고수율로 수득할 수 있는 고활성 불균일계 촉매 및 이의 제조방법에 관한 것이다.
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.
Abstract:
본 발명은 하기 화학식 1로 표시되는 알킬 싸이아다이아졸 싸이아에스테르 화합물, 그의 제조 방법 및 그를 포함하는 내마모제에 관한 것이다. [화학식 1]
상기 화학식 1에서, R 1 은 탄소수 1 내지 10의 알킬기이고 R 2 는 탄소수 8 내지 20의 알킬기 또는 알케닐기이다. 본 발명의 알킬 싸이아다이아졸 싸아아에스테르 내마모제는 종래와 동등이상의 내마모성을 가지면서, 생분해성이 우수하고, 특히 몰리브데늄 및 아연 등의 중금속과 인 등의 피독성 물질을 함유하지 않아 종래의 내마모제에 비해 친환경적이라는 장점이 있다.
Abstract:
PURPOSE: An alkyl thiadiazole thioester compound and an anti-abrasive including the same are provided to have anti-abrasiveness and to enhance biodegradation property. CONSTITUTION: An alkyl thiadiazole thioester compound is represented by chemical formula 1. In the chemical formula 1, R1 indicates alkyl group having 1-10 carbons and R2 indicates alkyl or alkenyl group having 8-20 carbons. The alkyl thiadiazole thiaester compound of the chemical formula 1 is methyl-1,3,4-thiadiazole thianonanoyl ester, methyl-1,3,4-thiadiazole thia oleyl ester, methyl-1,3,4-thiadiazole thia undecyl ester or methyl-1,3,4-thiadiazole thia dodecyl ester. A manufacturing method of the alkyl thiadiazole thiaester compound comprises the following step: reacting the alkyl 1,3,4-thiadiazole thiol represented by chemical formula 2 with fatty acid or fatty acid halogen compound represented by chemical formula 3.