Abstract:
The present invention relates to an antioxidant composition for biodiesel, and to an antioxidant composition having improved oxidation efficiency. The antioxidant composition for biodiesel includes a hydroquinone-base antioxidant, one or more base additive selected from triethylene tetra amine and triethylene pentamine. The antioxidant composition according to the present invention has an excellent effect of extremely increasing oxidation stability compared with independently using of an oxidation stabilizer.
Abstract:
본 발명은 바이오디젤용 하이드로퀴논계 산화방지제 화합물로 사용되는 2-tert-부틸 하이드로퀴논과 부틸 하이드록시아니솔의 제조방법에 관한 것으로 본 발명에 따른 제조방법은 반응온도와 시간을 조절하여 미반응된 하이드로퀴논과 용매를 재사용하여 부틸 하이드로퀴논과 부틸 하이드록시아니솔의 순도가 높고 간단하고 경제적이며 효율적인 방법이다.
Abstract:
PURPOSE: A non-aqueous fluid marker containing N-benzyl-N-ethylaniline and a preparation method of the same are provided to improve the dissolution of the marker to non-aqueous fluid products. CONSTITUTION: A non-aqueous fluid marker contains N-benzyl-N-ethylaniline represented by chemical formula 1. In chemical formula 1, R is a C1 to C12 alkyl group, a C1 to C12 alkoxy group, a C1 to C12 hydroxyalkyl group, a C1 to C12 hydroxylalkoxyalkyl group, a C1 to C12 alkylphenyl group, a C1 to C12 alkoxyphenyl group, a nitro group, a cyan group, or a halogen atom. A preparation method of the non-aqueous fluid marker includes the following: an aniline derivative represented by chemical formula 3 is diazotized; and the diazotized aniline derivative is reacted with N-benzyl-N-ethylaniline represented by chemical formula 4.
Abstract:
본 발명은 광흡수제, 특히 근적외선 흡수 색소로 유용하게 사용할 수 있는 헵타메틴계 시아닌 화합물 및 이의 제조방법에 관한 것으로서, 더욱 상세하게는 2-클로로-3-(히드록시메틸렌)-5-(4-니트로페닐)시클로헥산카바알데히드를 중심으로, 양쪽에 인돌 유도체를 축합하여, 특정 치환기로 치환된 신규 화합물 및 이의 제조방법에 관한 것이다. 본 발명의 상기 화합물은 근적외선 흡수용 색소 및 고밀도 광기록용 매체의 성분으로 사용하기에 매우 적합하다. 근적외선, 헵타메틴계 시아닌, 인돌 유도체, 비스 포밀알데히드 유도체
Abstract:
PURPOSE: A spirobifluorene-based compound and a preparation method thereof are provided to improve luminous efficiency and processability due to good solubility in organic solvent. The compound is suitably applied as a blue light-emitting element with improved adhesiveness to a substrate, stability and service life. An organic light-emitting device using the novel spirobifluorene compound is also provided to improve the luminous efficiency, brightness and the purity and stability of colors. CONSTITUTION: The spirobifluorene-based compound has a structure of formula 1, wherein each R1 and R2 is a hydrogen atom, an alkoxy group having C1-20 or an alkyl group having C1-20; X is a fluorine atom, a cyano group or an amine group (-NRR, in which R is a hydrogen atom or an alkyl group having C1-20). The light-emitting device comprises a cathode, an anode and a light-emitting layer containing the spirobifluorene-based compound between the cathode and the anode.
Abstract:
PURPOSE: Provided is a water-insoluble dispersion-reactive dye having an acetoxy ethyl sulfone reactive group, which reduces pollution, dose not contain hazardous amine and metals, can be used in acidic and neutral condition, and is excellent in washing-fastness and properties. CONSTITUTION: The dispersion-reactive dye(formula 2) having the 4-aminophenyl-beta-acetoxy ethyl sulfone reactive group(formula 1) is produced by a process comprising the steps of: diazotizing the 4-aminophenyl-beta-acetoxy ethyl sulfone(formula 1); making a coupling solution by dissolving a coupler in water and concentrated hydrochloric acid; mixing the diazotized 4-aminophenyl-beta-acetoxy ethyl sulfone with the coupling solution at 0-5deg.C; adding a base to keep pH neutral condition and separating the produced dye. In the formula, R, R1, R2, and R3 are identically or differently hydrogen, alkyl, alkoxy, cyanoalkyl, amino acetyl, and amino ester.
Abstract:
PURPOSE: Provided are benzimidazolone-based yellow pigments which are excellent in solvent resistance and colorfastness to light and provides a high yield, and a method for preparing the same. CONSTITUTION: The benzimidazolone-based yellow pigments represented by formula 1 are characterized in that it is prepared by using amino benzimidazolone represented by formula 9, as a diazotized compound. In the formulas, R, R1 and R2 which are the same or different, are hydrogen, C1-C4 alkyl group, nitro(-NO2) group, C1-C2 alkoxy group, C1-C18 heterocycle, methyl ester(COOCH3) or halogen group such as chloro or bromo. The yellow pigments are prepared by the steps of (i) diazotizing amino benzimidazolone compound represented by formula 9; (ii) dissolving a coupler represented by formula 11 into a solvent; (iii) mixing two solutions obtained from the steps (i) and (ii) at 0-5 deg.C; and (iv) adding base to the solution mixed in the step(iii) to adjust pH to 6-7 with stirring. In the formula 11, R, R1 and R2 are the same as the above.
Abstract:
PURPOSE: Provided are pigment yellow based on quinoxaline which is ecofriendly and has excellent solvent resistance and colorfastness to light, and a method for preparing the same. CONSTITUTION: The pigment yellow based on quinoxaline represented by formula 1 is characterized in that it is prepared using aminoquinoxaline represented by formula 9, as a diazotized compound. In the formulas, R, R1 and R2 are the same or different, and hydrogen, C1-C4 alkyl group, nitro(-NO2), C1-C2 alkoxy group, C1-C18 heterocycle, methyl ester(COOCH3) or halogen group such as chloro or bromo. The pigment yellow is prepared by the steps of (i) diazotizing amino quinoxaline compound represented by formula 9; (ii) dissolving coupler represented by formula 11 into solvent; (iii) mixing two reaction solution obtained from the steps (i) and (ii) at 0-5 deg.C; and (iv) adding base to the solution mixed in the step(iii) to adjust pH to 6-7 with stirring. In the formula 11, R, R1 and R2 are the same as the above.