DIFFICULTLY COMBUSTIBLE POLYPROPYLENE COMPOSITION Russian patent published in 1997 - IPC

FIELD: manufacture of electronic, home appliances, and television sets. SUBSTANCE: composition comprises, wt.-%: polypropylene, 37.8-38.6; naphthane agent based on N-(2,4,6-tribromophenyl-β-(bromonaphthylamine), 10-15; aluminium hydroxide, 15-24; antimony trioxide, 3-5; talc, 13-17; oleic acid or polymethylsiloxane liquid, 0.3-1.0; oligomer diallyl phthalate having molecular weight of 250-10,000, 0.08-1.00. Properties of the composition: flow index at 230 C, P=2.16 kgf/10 min is 8.4-15; shrinkage is 0.08- 1.3%; rapture strength is at least 22-27 Mpa; electrical resistance is at least 36-40 kV/mm; when ignited for 10 and 20 s according to specifications 6.05-1968-84 in gas butane flame with burner located vertically. The test specimens in the chamber burn for not longer than 30 s after ignition. EFFECT: improved properties of the difficultly combustible polypropylene composition. 2 tbl