Abstract:
PURPOSE: Glycidyl dinitropropyl carbonate and poly(glycidyl dinitropropyl carbonate) are provided. Prepolymer having improved thermal stability is cheaply prepared by substituting a nitrate group by a nitro group as an energy group. CONSTITUTION: Glycidyl dinitropropyl carbonate represented by the formula(I) is provided. Poly(glycidyl dinitropropyl carbonate) represented by the formula(II) and having molecular weight of 2,000 to 3,500 is provided. A process for preparing the glycidyl dinitropropyl carbonate of the formula(I) comprises the steps of: dissolving 2,2-dinitropropanol in methylenechloride; adding pyridine into the mixture; adding allylchloroformate in methylene chloride to the mixture and reacting them; adding methylenechloride and distilled water into the mixture; dehydrating the methylenechloride extract with anhydrous magnesium sulfate; filtering the dehydrated solution to prepare allyl dinitropropyl carbonate; dissolving allyl dinitropropyl carbonate in methanol; adding hydrogen peroxide and NaOH into the mixture and reacting them; adding methylenechloride and distilled water into the mixture; dehydrating the methylenechloride extract with anhydrous magnesium sulfate; and filtering the dehydrated solution. A process for preparing the poly(glycidyl dinitropropyl carbonate) of the formula(II) comprises the steps of: mixing boron trifluoride etherate with 1,4-butanediol and removing ether under reduced pressure; dissolving the glycidyl dinitropropyl carbonate of the formula(I) in the boron trifluoride etherate solution; adding methylenechloride and distilled water into the mixture; dehydrating the mixture with anhydrous magnesium sulfate; adding ethanol into the dehydrated solution; and removing volatile compounds under reduced pressure.
Abstract:
PURPOSE: An energetic nitro-formal plasticizer for explosive formulations comprises eutectic mixture mixed with bis(2,2-dinitropropyl)formal(BDNPF), 2,2-dinitropropyl 2,2-dibutyl formal(DNPBF) and bis(2,2-dinitrobutyl)formal(BDNPF). The energetic nitro-formal plasticizer exhibits superior thermal/chemical properties with less production cost. CONSTITUTION: The molecular ratio of BDNPF/DNPBF/BDNPF in formulation of this plasticizer is in the range 20-68%/28-50%/4-30%. The plasticizer is allowed to contain diformal, however its content is desirable controlled to be not more than 3%. The preparation method of this plasticizer comprises the steps of (i) dissolving 2,2-dinitropropanol and 2,2-dinitrobutanol in the mole ratio of 3 to 6:1 at 0 to 30deg.C in an organic solvent like methylene chloride; (ii) at 20deg.C or lower, adding sulfuric acid solution in which formaldehyde sources such as paraformaldehyde and s-trioxane is dissolved; (iii) refining obtained mixture.
Abstract:
The present invention provides a method for preparing 2,4-dinitroimidazole, wherein separation of 1,4-donitroimidazole in powder form is avoided so that it is possible to eliminate allergy problems in workers and simplify the process, thereby improving process economy.
Abstract:
Provided is a nitrification method of 4,6-dihydroxy-2-methylpyrimidine used as a precursor of 1,1-diamino-2,2-dinitro ethylene which is a kind of gunpowder by using an organic solvent to secure a high yield. A nitrification method of 4,6-dihydroxy-2-methylpyrimidine comprises the following steps of: melting the 4,6-dihydroxy-2-methylpyrimidine in concentrated sulfuric acid in a first step; adding dichloromethane to a solution of the first step in a second step; and adding concentrated nitric acid to the solution of the second step and stirring the obtained solution in a third step.
Abstract:
본 발명은 신규물질인 2,2-디나이트로프로필 아크릴레이트와 2,2-디나이트로부틸 아크릴레이트의 공중합체를 제공한다. 상기 공중합체는 기존의 에너지 함유 결합제보다 기계적 강도가 우수할 뿐 아니라, 상기 공중합체를 복합 화약에 적용하는 경우 기존의 에너지 함유 결합제에 비하여 복합 화약을 둔감시키는 효과가 있다.
Abstract:
An energetic plascitizer comprising bis(2,2-dinitropropyl) formal, 2,2-dinitropropyl 2,2-dinitrobutyl formal and bis 2,2-dinitrobutyl) formal in a molar ratio of 20~68%/28~50%/4~30% is, described. It is also provided a method for synthesizing the plasticizer comprising: dissolving 2,2-dinitropropanol and 2,2-dinitrobutanol into an organic solvent to form an organic solution, in which the molar ratio of 2,2-dinitropropanol to 2,2-dinitrobutanol is 3:1-6:1; adding to the organic solution a sulfuric acid solution where formaldehyde source was dissolved, wherein the temperature of reaction medium is maintained below 20° C.; and separating and purifying the product from the reaction mixture.The plascitizer according to the present invention has an excellent thermal and chemical properties while incurring a low production cost. Especially, the energy content of the plasticizer of the present invention is heightened by minimizing the content of the diformal generated as a side product, so that it is favorably adapted for use in an insensitive high performance explosive and a propellant.
Abstract:
본 발명은 비스(2,2-디니트로프로필)포름알(BDNPF)과 결정화 방지제를 함유하는 고에너지 가소제에 있어서, 상기 결정화 방지제가 비스(2,2-디니트로프로필)디포름알(BDNPDF)인 것을 특징으로 하는 가소제 및 그 제조 방법에 관한 것이다. BDNPF의 결정화 방지를 위해 BDNPDF를 사용할 경우, -20℃의 온도에서 6개월 이상 방치하더라도 결정화되지 아니하며, 열적/화학적 특성도 우수한 것으로 밝혀졌다. 그리고 반응 부산물로 간주되어온 BDNPDF를 결정화 방지제로 사용함에 의해 BDNPDF를 제거하기 위한 부차적 공정이 불필요하고, 생산비가 저렴하다는 이점이 있다.
Abstract:
복합화약에서 고분자 결합제로 사용되는 폴리글리시딜 나이트레이트 합성용 모노머인 글리시딜 나이트레이트의 개선된 제조방법 및 이를 중합함으로써 폴리글리시딜 나이트레이트를 제조하는 방법이 제공된다. 본 발명의 방법에 따라 글리시딜 나이트레이트 제조시 질산염 존재하에 반응을 시키고 폴리글리시딜 나이트레이트 제조시 활성화 모노머 중합법을 사용함으로써 종래방법보다 더 높은 수율로 부생성물 없이 목적생성물을 얻을 수 있다.
Abstract:
복합화약에서 고분자 결합제로 사용되는 폴리글리시딜 나이트레이트 합성용 모노머인 글리시딜 나이트레이트의 개선된 제조방법 및 이를 중합함으로써 폴리글리시딜 나이트레이트를 제조하는 방법이 제공된다. 본 발명의 방법에 따라 글리시딜 나이트레이트 제조시 질산염 존재하에 반응을 시키고 폴리글리시딜 나이트레이트 제조시 활성화 모노머 중합법을 사용함으로써 종래방법보다 더 높은 수율로 부생성물 없이 목적생성물을 얻을 수 있다.