Abstract:
A polymeric bonding agent for composite solid propellent is provided to increase mutual bonding between filler and binder and to improve mechanical properties of the propellent by comprising terpolymer based on acrylonitrile or methacrylonitrile, 2-hydroxyethylacrylate or 2-hydroxyethylmethacrylate, acrylic acid or methacrylic acid, and carboxylic functional group hydrogen bonded to nitramine oxidant. The polymeric bonding agent includes polymer having carboxylic acid functional group capable of hydrogen bonding to nitramine oxidant and, comprises terpolymer containing: 0.3-15.0wt.% of acrylic acid or methacrylic acid; 10.0-30.0wt.% of 2-hydroxyacrylate or 2-hydroxymethacrylate; and 45.0-89.7wt.% of acrylonitrile or methacrylonitrile. The bonding agent has number average molecular weight ranging from 3,0000 to 100,000. The solid propellent includes nitramine oxidant and uses the polymeric bonding agent.
Abstract:
본 발명은 철 화합물을 연소 촉매로 사용하는 추진제에 경화 반응 억제제로서 N,N'-비스(살리실리덴)-2,2'-(에틸렌디옥시)비스(에틸아민), N,N'-비스(살리실리덴)에틸렌디아민, N-살리실리덴-2-아미노페놀 또는 이들의 혼합물이 첨가된 HTPB/AP 추진제 조성물 및 그 제조방법에 관한 것이다.
Abstract:
PURPOSE: Provided is a purification method of high purity HNIW(hexanitrohexaazaisowurtzitane) used as an oxidant of solid propellants for various rockets, by re-crystallization, thereby eliminating impurities and moisture effectively to allow easy the phase transfer of HNIW and to control the particle sizes easily. CONSTITUTION: The purification method of HNIW characteristically comprises the step of recrystallization by using di(C1-3 alkyl) carbonate, preferably dimethyl carbonate, as a recrystallization solvent. Therefore, HNIW compounds having a purity of 99% are obtained.
Abstract:
PURPOSE: Provided is a purification method of high purity HNIW(hexanitrohexaazaisowurtzitane) used as an oxidant of solid propellants for various rockets, by re-crystallization, thereby eliminating impurities and moisture effectively to allow easy the phase transfer of HNIW and to control the particle sizes easily. CONSTITUTION: The purification method of HNIW characteristically comprises the step of recrystallization by using di(C1-3 alkyl) carbonate, preferably dimethyl carbonate, as a recrystallization solvent. Therefore, HNIW compounds having a purity of 99% are obtained.
Abstract:
PURPOSE: A method for controlling the size of an ε type HNIW (hexanitrohexaazaisowurtzitane) crystal is provided to easily manufacture a crystal having a desirable size not including fine crystals by injecting a material to be crystallized as a seed so that only the growing of the crystal is enabled to have a required crystal size while restraining the generation of nuclei in the crystallization process where the nuclei generation coexists with the growing phenomena of crystals. CONSTITUTION: The method comprises the process of crystallizing HNIW in a batch type crystallizer using a solvent having a high solubility on HNIW selected from the group consisting of esters, ketones, hydrocarbon cyanides and ethers as a solvent and using a solvent having a low solubility on HNIW selected from the group consisting of hydrocarbons, hydrocarbon halides, aromatic compounds and alcohols as a precipitant, wherein an ε type HNIW used as a seed is added so that the HNIW is transformed into the ε type HNIW on the solution, thereby growing the ε type HNIW seed so as to control a size of the crystal of the ε type HNIW.
Abstract:
본 발명의 추진제 조성물은 사슬 말단에 수산기를 가지고, 곁가지로 아지드기를 포함하는 프리폴리머, 트리아졸 경화제 및 우레탄 경화제를 포함하는 경화제, 그리고 산화제를 포함한다. 본 발명의 추진제 조성물은 고 에너지를 가지고 있으면서도 인장특성을 향상시켜 기계적 특성이 우수하며, 수분에 덜 민감한 경화시스템을 사용하여서 기존에 수분에 취약한 특성을 가진 산화제를 적용할 수 있고, 추진제 제조시의 공정성을 향상시켰으며, 무연 추진제로도 응용할 수 있다.
Abstract:
본 발명은 연소 특성 개선제로서 비스무스 서브살리실레이트(bismuth subsalicylate)를 포함하는 나이트레이트 에스테르 폴리에테르계 열경화성 고체 추진제 조성물에 있어서, 3차 아민을 추가적으로 포함하는 것을 특징으로 하는 조성물에 관한 것이다.
Abstract:
A manufacturing method of 1,1'-dimethyl-5,5'-bitetrazole is provided to shorten a reaction time, to improve yield and to be manufactured inexpensively. A manufacturing method of 1,1'-dimethyl-5,5'-bitetrazole comprises steps of: forming intermediate by reacting N,N'-dimethyl oxamide and acetonitrile in a solvent including acetonitrile; and cyclizing it by adding sodium azide to the intermediate. The first step and the second step are performed at a temperature of 20~30°C and a same reactor.
Abstract:
본 명세서는 입사 신호를 수신하기 위해 반향음을 제어하는 음향 반향음 제어 장치에 관한 것으로, 입사 신호의 수신 여부를 판단한 결과에 따라 제어 신호를 생성 및 방사하고, 반사부, 방사부 및 수신부를 하나의 모듈로 구비함으로써, 불필요한 제어 신호를 발생시키지 않고 반향음을 제어할 수 있는 음향 반향음 제어 장치에 관한 것이다.