Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2003-01-10
2004-03-16
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C149S019100, C528S198000
Reexamination Certificate
active
06706849
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to glycidyl di-nitropropyl carbonate and poly(glycidyl di-nitropropyl carbonate), and more particularly, to poly(glycidyl di-nitropropyl carbonate) which is prepolymer used as an energetic binder for an insensitive and high performance explosive.
2. Background of the Related Art
There is a prepolymer of hydroxyl-terminated polybutadiene(HTPB) used widely as a binder of a plastic-bonded explosive(PBX) according to a related art. The binder is included in about 15% of PBX so as to improve a mechanical property. Yet, the binder is an inert material, thereby reducing energy of PBX. Hence, many efforts are made to develop an energetic binder for increasing the energy of PBX. As a result of such efforts, various energetic binders have been developed such as {poly(glycidyl nitrate)}(PGN), {poly(3-nitratomethyl-3-methyloxetane)}(PNMMO), and the like. However, they show poor thermal stability since the thermal decomposition initiating temperature by each prepolymer containing a nitrate group(—ONO
2
) as an energy group appears at about 180° C.
Therefore, the inventors of the present invention has made many efforts to improve the thermal stability of the energetic binder in a manner that a nitro group(—NO
2
) is introduced instead of the nitrate group as well as hydrogen is removed so as not to resolve the nitro group by considering the fact that the hydrogen adjacent to the nitrate group accelerates the chain scission reaction of polyurethane elastomers in PGN.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to glycidyl di-nitropropyl carbonate and poly(glycidyl di-nitropropyl carbonate) that substantially obviate one or more problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide glycidyl di-nitropropyl carbonate used as a monomer of an energy binder and poly(glycidyl di-nitropropyl carbonate) used as a prepolymer by introducing a nitro group and removing hydrogen accelerating a resolution reaction.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, glycidyl di-nitropropyl carbonate according to the present invention is represented by the following chemical formula 1:
[Chemical Formula 1]
In another aspect of the present invention, poly(glycidyl di-nitropropyl carbonate) is represented by the following chemical formula 2:
[Chemical Formula 2]
wherein a molecular weight is 2,000-3,500.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
REFERENCES:
patent: 4139403 (1979-02-01), Baum et al.
Kim Jin Seuk
Lee Keun Deuk
Park Bang Sam
Boykin Terressa
Scully Scott Murphy & Presser
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