Agency for Defense Development

Samsung Display Co., Ltd.

Agency for Defense Development a Non Profit Korean Organization

Agency for Defense a Korean Non-profit Organization

Agency for Defence a Korean Non-profit Org.

Jin Seuk Kim

Jin Rai Cho

Keun Deuk Lee

Seung Hee Kim

Bum Jae Lee

In Joo Bae

Eun Mee Goh

Bang Sam Park

Young Hwan Kwon

Jae Kyoung Kim

Chul Huh

Sun-Young Chang

Yui-Ku Lee

Young Gyu Kim

Hyoun-Soo Kim

Tae Hwan Ha

Hyoun Soo Kim

Kyoo Hyun Chung

Hye Ryoung Lee

Moon Yong Shin

Myeong Hak Kim

Jin Rae Cho

Jeong-Kook Kim

Young Gu Cheun

Disclosed is an energetic reactive plasticizer for a plastic bonded explosive (PBX), and specifically an energetic reactive plasticizer for PBX which has high performance and insensitiveness without a plasticizer migration by being bonded with a polymer binder for a plastic bonded explosive.

Ester-based reactive plasticizer for plastic bonded explosives

Provided is a method for a poly(GAP-co-THF)diol prepolymer in which THF monomer units are copolymerized to GAP, having high difunctionality, a reduced amount of cyclic oligomer side products having a small molecular weight, a wide copolymer composition and controlled molecular weight. The resulted poly(GAP-co-THF)diol prepolymer according to the present invention is used as a binder for a high-energy PBX or composite propellant, specifically used as a binder in the preparation of polyurethane having excellent mechanical properties.

Method for preparing a difunctional poly(GAP-co-THF)diol for preparation of polyurethane having excellent mechanical properties

Disclosed is an energetic reactive plasticizer for a plastic bonded explosive (PBX), and specifically an energetic reactive plasticizer for PBX which has high performance and insensitiveness without a plasticizer leak by being bonded with a polymer binder for a plastic bonded explosive.

Ether-based reactive plasticizer for plastic bonded explosives

According to the present invention, unstable hydrogen of 4,4',5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, which is a promising material for insensitive high-performance molecular explosives, may be stabilized by aminoguanidium to provide di(aminoguanidium) 4,4&#x2032;,5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, thereby solving the hygroscopicity of 4,4&#x2032;,5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, and enhancing performance and insensitivity thereof.

Di(aminoguanidium) 4,4',5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, and preparation method thereof

Provided are hexaaza[3.3.3]propellane compounds represented by the following formula (I), which can be used as a main skeleton structure for novel molecular explosives and method for preparing the same: 

Hexaaza [3.3.3] propellane compounds as key intermediates for new molecular explosives and a method for preparing the same

A liquid crystal display includes a color filter including a dye and a pigment, and the color filter is formed from a compound represented by the following Formula 1. wherein R1 is hydrogen or a substituted or unsubstituted C-Calkyl group, X, X, and Xare independently a NRRgroup, OR, a RC&#x2550;CRRgroup, or a OC(&#x2550;O)RC&#x2550;CRRgroup, and Rto Rare independently hydrogen or a substituted or unsubstituted C-Calkyl group.

Liquid crystal display and method of manufacturing the same

Disclosed is a method for preparation of 1,1-diamino-2,2-dinitroethylene (DADNE) through the hydrolysis of 4,6-dihydroxy-5,5-dinitro-2-(dinitromethylene)-2,5-dihydropyrimidine (DHDNDP) obtained by the nitration of 4,6-dihydroxy-2-methylpyrimidine (DHMP), which can avoid eruption or sudden frothing of a reaction solution on a lab scale and even a large scale preparation as well as reduce the reaction time.

Method for preparation of 1,1-diamino-2,2-dinitroethylene

Disclosed is a method for the nitration of 4,6-dihydroxy-2-methylpyrimidine for the synthesis of 4,6-dihydroxy-5,5-dinitro-2-(dinitromethylene)-2,5-dihydropyrimidine which is used as a precursor of 1,1-diamino-2,2-dinitroethylene, one type of explosives. The present invention provides an improved method for the nitration of 4,6-dihydroxy-2-methylpyrimidine, wherein organic solvent is applied in the nitration process of 4,6-dihydroxy-2-methylpyrimidine thereby solving the safety problem while improving the yield of nitration.

Method for the nitration of 4,6-dihydroxy-2-methylpyrimidine

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.

Method for preparation of 2,4-dinitroimidazole which is an intermediate for insensitive meltcastable molecular explosive

A synthesis of an energetic prepolymer used as a high-energy binder for an insensitive and high performance explosive is disclosed. More specifically, provided are a novel compound 2-nitratoethyl oxirane expressed by formula III, a novel compound poly(2-nitratoethyl oxirane) expressed by formula IV, obtained by polymerization of 2-nitratoethyl oxirane used as a monomer and a preparation method thereof. The compound, used as an energetic prepolymer and a monomer for preparation thereof can substitute for existing poly(glycidyl nitrate) (PGN) which has been known to be a promising one having the best performance among existing energetic prepolymers, but which has a problem to be self-decomposed after synthesis of polyurethane elastomer, to solve this problem. 

2-Nitratoethyl oxirane, poly (2-nitratoethyl oxirane) and preparation method thereof

Disclosed are novel compounds that can be used as an energetic binder used for improving the performance and the properties of a high explosive, and a preparation method thereof. More specifically, provided are glycidyl dinitropropyl formal of chemical formula IV having a nitro group (&#x2014;NO) as an energy group and having no hydrogen bonding to carbon to which the nitro group is binding, poly(glycidyl dinitropropyl formal) of chemical formula V polymerized using the glycidyl dinitropropyl formal as a monomer, and a preparation method thereof. 

Glycidyl dinitropropyl formal poly (glycidyl dinitropropyl formal) and preparation method thereof

A synthesis of an energetic prepolymer used as a high-energy binder for an insensitive and high performance explosive is disclosed. More specifically, provided are a novel compound 2-nitratoethyl oxirane expressed by formula III, a novel compound poly(2-nitratoethyl oxirane) expressed by formula IV, obtained by polymerization of 2-nitratoethyl oxirane used as a monomer and a preparation method thereof. The compound, used as an energetic prepolymer and a monomer for preparation thereof can substitute for existing poly(glycidyl nitrate) (PGN) which has been known to be a promising one having the best performance among existing energetic prepolymers, but which has a problem to be self-decomposed after synthesis of polyurethane elastomer, to solve this problem 

2-nitratoethyl oxirane, poly(2-nitratoethyl oxirane) and preparation method thereof

Disclosed are novel compounds that can be used as an energetic binder used for improving the performance and the properties of a high explosive, and a preparation method thereof. More specifically, provided are glycidyl dinitropropyl formal of chemical formula IV having a nitro group (&#x2014;NO) as an energy group and having no hydrogen bonding to carbon to which the nitro group is binding, poly(glycidyl dinitropropyl formal) of chemical formula V polymerized using the glycidyl dinitropropyl formal as a monomer, and a preparation method thereof 

Glycidyl dinitropropyl formal, poly(glycidyl dinitropropyl formal) and preparation method thereof

Disclosed are glycidyl di-nitropropyl carbonate and poly(glycidyl di-nitropropyl carbonate) which is prepolymer used as an energetic binder for an insensitive and high performance explosive. The present invention introduces the nitro group instead of the nitrate group, thereby enabling to provide the prepolymer having the high thermal stability (thermal decomposition initiating temperature of at least 200&deg; C. or higher) more excellent than that of the conventional energy binder.

Growing community of inventors

Daejeon, South Korea

Jin Seuk Kim