| 摘要 |
PURPOSE:To provide an expandable fireproofing compsn. for covering cables, which has excellent resistance to fire and weather, etc., by blending low-pressure linear polyethylene and a halogen compd. 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. mono-pentaerythritol or dipentaerythritol), a nitrogen-contg. blowing agent (B) (e.g. dicyandiamide or melamine) and a flame-retardant dehydrating agent (C) (e.g. polyammonium phosphate) are mixed together in a weight ratio of A:B:C of 1:1:1 or 1:1:2, thus obtaining an expandable flame retarder, 35-65wt% said expandable flame retarder, 30- 50wt% low-pressure linear polyethylene and 1-10wt% halogen compd. (e.g. chlorinated paraffin or chlorinated naphthalene) are mixed together to obtain the desired expandable fireproofing compsn.
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