| 摘要 |
PURPOSE:To provide the titled compsn. for covering cables, which has excellent resistance to fire and weather, etc., by blending low-pressure linear polyethylene and a chlorinated polyethylene with an expandable flame retarder consisting of a polyhydric alcohol, a nitrogen-contg. blowing agent and a flame-retardant dehydrating agent. CONSTITUTION:A polyhydric alcohol (A) (e.g. monopentaerythritol or dipentaerythritol), a nitrogen-contg. blowing agent (B) (e.g. dicyandiamide or melamine) and a flame-retardant dehydrating agent (C) (e.g. polyammonium phosphate or melamine photphate) are mixed together in a weight ratio of A:B:C of pref. 1:1:1 or 1:1:2, thus obtaining an expandable flame retarder. 35-60wt% said expandable flame retarder, 20-40wt% low-pressure linear polyethylene and 1-15wt% chlorinated polyethylene are mixed together to obtain the desired expandable fireproofing compsn.
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