| 摘要 |
A composition generating an IR-opaque smoke in the form of a compact which has a density in the range from 0.9 to 1.5 g/cm3 is described, comprising from 10 to 25 percent by weight of magnesium powder, from 5 to 35 percent by weight of a fluorinated organic poller, from 5 to 15 percent by weight of chloroparaffin and from 35 to 65 percent by weight of an aromatic compound of the formula I <IMAGE> (I) wherein A and B are independently selected from <IMAGE> R1 and R2 are independently selected from OH, X or alkyl having one to four carbon atoms, m and n is an integer from 0 to 2, and X is halogen, or an aromatic compound of formula II defined as above and D and E are independently selected from <IMAGE> or phtalic anhydride, 2-benzoyl pyridine, fluorene, dibenzosuberenone or diphenylenesulphide or the derivatives thereof substituted by R1m and/or R2m.
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