| 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, a specified copolymer and a halogen-contg. flame retarder with an expandable flame retarder consisting of a polyhydric alcohol, a blowing agent and a dehydrating agent. CONSTITUTION:A polyhydric alcohol (A) (e.g. monopentaerythritol), a nitrogen- contg. blowing agent (B) (e.g. dicyandiamide) and a flame-retardant dehydrating agent (C) (e.g. polyammonium phosphate) 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, 5-15wt% ethylene/vinyl acetate copolymer of ethylene/acrylate copolymer and 1-10wt% halogen-contg. flame retarder (e.g. chlorinated paraffin) are mixed together to obtain the desired expandable fireproofing compsn.
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