Priming compositions frictionators

Both 2,4-dinitrosoresorcinol (23) and 2,4-dinitroresorcinol (24) are important in the explosives industry. The lead salt of 2,4-dinitrosoresorcinol has a low ignition temperature and finds use in priming compositions and in electrical igniters. The lead salt of 2,4-dinitroresorcinol is a weak initiator but is found to exhibit high sensitivity to friction and stab action without being highly sensitive to impact, and as such, this compound has found use in primers. 

F- FRICTION WIRE PULL WIRES M- PRIMING COMPOSITION T- CLOSING COVER (BOTTOM)... 

Glass in Priming Compositions. It is known that sensitivity of expl mi its to friction (percussion) is greatly increased when a small amt of ground glass [or of other abrasive material, such as sand or carborundum (See Vol 2, p C65-L)] is mixed with (he expl... 

Abrasive. Any grinding or polishing material, such as emery, ground glass, carborundum, infusorial earth, pumice etc. Some of these materials are used in priming compositions in order to increase the sensitivity of other components (such as MF, KCIO, etc) to friction or impact. Crystalline SbaS3 used in priming compns functions not only as a fuel but also as an abrasive(See under Primers)... 

Ammonium picrate forms bright yellow scales, or orthorhombic crystals, which are insoluble in water. The crystals explode easily from heat, shock, friction, fire, and percussion. Ammonium picrate is commonly used in priming compositions for bullets and the like, initiation compositions for blasting caps and detonators, high performance rocket propellants, and fireworks and other pyrotechnic compositions. Ammonium picrate should be stored submerged in kerosene. ... 

Chem. Descrip. UHMWPE, modified CAS 9002-88-4 EINECS/ELINCS 200-815-3 Uses Surface modified particies producing cast eiastomer composites with high abrasbn resist, and iow coeff. of friction imparts improved abrasion, corrosion and chem. resist, in coatings Properties Mesh size 250 Prime 5 [Muiti-Kem]... 

The lack of adherence is a parameter of prime importance. Indeed, when compared to a perfect contact, a sliding contact with a friction coefficient p=0.5 leads to a decrease of the Young s modulus and the compressive strength of the composite material of respectively 42% and 48%. When compared to the matrix alone, the variation in the elastic modulus and the maximal strength is respectively -17% and -45.5%. It appears obvious that the addition of siliceous aggregates may decrease these two important engineering properties. 

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