Abstract:
PURPOSE: Nitratoethyl oxirane, poly(2-nitratoethyl oxirane) and a preparation method thereof are provided, which compounds have similar energy to PGN(polyglycidylnitrate) and improved storage stability. Therefore, they can be useful as energetic prepolymers. CONSTITUTION: The 2-nitratoethyl oxirane is represented by the formula (III). The poly(2-nitratoethyl oxirane) is represented by the formula (IV). The method for preparing the poly(2-nitratoethyl oxirane) of the formula (IV) comprises the steps of: preparing 1,4-dinitrato-2-butanol of the formula (II) from 1,2,4-butanetriol of the formula (I); preparing 2-nitratoethyl oxyran of the formula (III) from 1,4-dinitrato-2-butanol of the formula (II); and polymerizing the 2-nitratoethyl oxyran of the formula (III).
Abstract:
Disclosed is a preparation method of 2,2'-bi-1H-imidazole using glyoxal and an ammonium salt as starting materials through a safe, simple and easily controlled synthetic process with a high yield.
Abstract:
PURPOSE: Glycidyl dinitropropyl formal, poly(glycidyl dinitropropyl formal) and a preparation method thereof are provided, which compounds have improved thermal stability and improved storage stability. Therefore, they can be useful as energetic prepolymers. CONSTITUTION: The glycidyl dinitropropyl formal represented by formula (IV). The poly(glycidyl dinitropropyl formal) is represented by the formula (V) . The method for preparing the poly(glycidyl dinitropropyl formal) of the formula (V) comprises the steps of: reacting 2,2-dinitropropyl alcohol of the formula (I) with allyl alcohol of the formula (II) to prepare allyl dinitropropyl formal of the formula (III); preparing glycidyl dinitropropyl formal of the formula (IV) from the allyl dinitropropyl formal of the formula (III); and polymerizing the glycidyl dinitropropyl formal of the formula (IV).
Abstract:
PURPOSE: A preparation method of 2,2'-bi-1H-imidazole using an ammonium salt and glyoxal is provided, thereby simply and stably preparing 2,2'-bi-1H-imidazole in higher yield. CONSTITUTION: A preparation method of 2,2'-bi-1H-imidazole comprises the steps of: dissolving an ammonium salt in water to prepare slurry; slowly dropping 20 wt.% of glyoxal into the slurry at 30 to 60 deg. C for 2 to 4 hours; and stirring the mixture at room temperature for 0 to 5 hours, wherein the ammonium salt is selected from the group consisting of ammonium acetate, ammonium benzoate, ammonium bromide, ammonium carbonate, ammonium chloride, ammonium chromate, ammonium dichromate, ammonium formate, ammonium nitrate, ammonium oxalate, ammonium sulfamate, ammonium sulfate, ammonium sulfite, ammonium tartrate, ammonium tetrafluoroborate, ammonium thiocyanate and ammonium thiosulfate.
Abstract translation:目的:提供使用铵盐和乙二醛的2,2'-双-1H-咪唑的制备方法,从而以更高的收率简单稳定地制备2,2'-双-1H-咪唑。 构成:2,2'-双-1H-咪唑的制备方法包括以下步骤:将铵盐溶解在水中以制备浆料; 在30至60℃下将20重量%的乙二醛缓慢滴入浆料中。 C 2〜4小时; 并在室温下搅拌混合物0至5小时,其中铵盐选自乙酸铵,苯甲酸铵,溴化铵,碳酸铵,氯化铵,铬酸铵,重铬酸铵,甲酸铵,硝酸铵 草酸铵,氨基磺酸铵,硫酸铵,亚硫酸铵,酒石酸铵,四氟硼酸铵,硫氰酸铵和硫代硫酸铵。
Abstract:
본 발명은 글라이시딜 디나이트로프로필 카보네이트 및 폴리(글라이시딜 디나이트로프로필 카보네이트)에 관한 것이다. 본 발명은 고성능 둔감 화약용 고에너지 결합제로 사용되는 예비중합체(prepolymer)인 폴리(글라이시딜 디나이트로프로필 카보네이트)를 제공한다. 본 발명에서는 나이트레이트기 대신 나이트로기를 에너지기로 도입함으로써 기존의 에너지 결합제에 비하여 열적 안정성이 월등히 개선된 예비중합체를 제공한다.
Abstract:
PURPOSE: Provided is a copolymer of 2,2-dinitropropyl acrylate and 2,2-dinitrobutyl acrylate, which is excellent in mechanical properties and can make composite gunpowder insensible compared to conventional energy-containing binders. CONSTITUTION: The copolymer(formula 1) of 2,2-dinitropropyl acrylate and 2,2-dinitrobutyl acrylate is produced by a process comprising the steps of: injecting the 2,2-dinitropropyl acrylate and the 2,2-dinitrobutyl acrylate into a reactor and mixing with a solvent in the presence of a radical initiator and injecting nitrogen into the reactor; stirring at 60-100deg.C for 3-8 hours; adding the resultant to methanol and stirring at ordinary temperature; drying produced precipitates. In the formula, X+Y=1.
Abstract:
PURPOSE: An energetic formal plasticizer for explosive formulations comprises bis(2,2-dinitropropyl)formal(BDNPF), and especially comprises bis(2,2-dinitropropyl)diformal(BDNPDF) as anti-crystalline agent. The energetic formal plasticizer exhibits superior thermal/chemical properties with less production cost. CONSTITUTION: The mole ratio of BDNPDF is desirable controlled to be 8-44mol.% of a mixture of BDNPF and BDNPDF. The preparation method of this plasticizer comprises the steps of (i) dissolving 2,2-dinitropropanol and formaldehyde source such as paraformaldehyde and s-trioxane in an organic solvent like methylene chloride; (ii) adding sulfuric acid solution while controlling the temperature of a reactor in the range of -30 to 20deg.C (iii) refining obtained mixture.
Abstract:
PURPOSE: A method for preparing 2,4-dinitroimidazole is provided to minimize allergy site and to simplify a process. CONSTITUTION: A method for preparing 2,4-dinitroimidazole comprises: a step of reacting acetic acid and nitric acid to 4-nitroimidazole to prepare 1,4-dinitroimidazole; a step of removing moisture to prepare a methylene chloride solution; and a step of adding chlorobenzene to the methylene chloride solution of 1,4-dinitroimidazole and reacting at 120-140°C for four to five hours to prepare 2,4-dinitroimidazole. A moisture drier for removing moisture is magnesium sulfate, calcium sulfate, calcium chloride, or sodium sulfate.
Abstract:
본 발명은 고폭 화약의 성능 증대 및 물성 개선을 위하여 사용되는 에너지화 결합제로서 사용될 수 있는 신규한 물질 및 그 제조방법에 관한 것이다. 보다 상세하게, 본 발명은 에너지기로서 니트로기(-NO 2 )를 가지며 니트로기가 결합된 탄소에 결합하는 수소를 갖지 않는 화학식 IV로 표현되는 신규한 화합물 글리시딜 디니트로프로필 포름알(glycidyl dinitropropyl formal), 이를 단량체로 사용하여 중합된 화학식 V로 표현되는 신규한 화합물 폴리(글리시딜 디니트로프로필 포름알) 및 그 제조방법에 관한 것이다. [화학식 IV]
Abstract:
본 발명은 고성능 둔감 화약용 고에너지 결합제로 사용되는 에너지화 예비 중합체(prepolymer)의 합성에 관한 것으로, 더욱 상세하게는, 화학식 III으로 표현되는 신규한 화합물 2-니트레이토에틸 옥시란(2-nitratoethyl oxirane), 이를 단량체로 사용하여 중합되어 얻어지는 화학식 IV로 표현되는 신규한 화합물 폴리(2-니트레이토에틸 옥시란)[poly(2-nitratoethyl oxirane)] 및 그 제조방법에 관한 것이다. 본 발명의 화합물을 에너지화 예비중합체 및 이를 위한 단량체로서 사용함으로써, 지금까지의 에너지화 예비중합체 중에서 가장 성능이 뛰어나고 유망한 것으로 알려져 있으나 폴리우레탄 탄성체를 합성한 후 자기 분해되는 특성을 갖는 기존의 폴리(글리시딜 니트레이트)의 문제점을 해결할 수 있다. [화학식 III]