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|  MIL-E-82886(OS)
materials, this chemical analysis must be conducted at least every 6 months on lots of materials being
used. The weight percent of each ingredient shall be to two significant figures.
TABLE I. PBXN-109 formulation.
Percent (by weight)
Ingredients
Specification
Nominal
Minimum
Maximum
Sym-Cyclotrimethylene trinitramine (RDX) 1
Type II Class 1
64.00
56.5
65.5
MIL-R-398
Type II Class 5
0.00
0.0
7.0
MIL-R-398
Aluminum Powder, Spherical, Type IV
20.00
18.00
22.00
WS 23150
Polybutadiene, Liquid, Hydroxyl-Terminated,
7.346
7.0
7.5
WS 23148
Type II (PolyBD) 2
Di (2-ethylhexyl) adipate (DOA)
7.346
7.0
7.5
DOD-D-23443
2,2'-methylenebis (4-methyl-6-tertiarybutyl
0.10
0.09
0.11
WS 23151
Phenol) antioxidant
N, N 2-Hydroxyethyl dimethyl-hydantoin (DHE)2
0.26
0.25
0.27
WS 23149
Triphenylbismuth (TPB) 3 (Dibutyltin dilaurate
0.02
0.015
0.045
MIL-T-82825
(DBTL)) 4
(DOD-D-82727)
Isophorone Diisocyanate (IPDI) 2
0.9465
--
--
WS 16305
1
A maximum of 7 percent Class 5 RDX may be used in the formulation to improve processing characteristics.
Addition of Class 5 RDX shall be made at the expense of Class 1 RDX. The total RDX weight shall be between 62
and 66 percent, with a nominal weight of 64 percent.
2
Typical equivalent analyses of binder components used to establish nominal composition are as follows:
PolyBD = 0.82 milliequivalent weight per gram (meq/g) (hydroxyl value) or 1219.5 g/eq (equivalent weight),
IPDI = 113.47 meq/g (equivalent weight),
DHE = 500 mg KOH/g (hydroxyl number) or 112.2 g/eq (equivalent weight),
NCO/OH Ratio = 1.0/1 (nominal).
3
Triphenylbismuth (TPB) is the recommended catalyst. Recommended nominal value is 0.02%.
4
Dibutyltin dilaurate (DBTL) may be substituted for TPB using between 0.002% and 0.02%. However, TPB is the
recommended catalyst.
3.4 Cured explosive requirements (M102). The cured explosive shall meet the requirements specified in Table
II.
TABLE II. Cured explosive requirements.
4
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