| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition which can give a molded product having highly excellent flame retardancy, a low specific gravity, and excellent mechanical properties, electrical characteristics (tracking resistance), and wet-heat resistance by mixing a polyamide resin with a polycarbonate resin, and red phosphorus having a specified conductivity in a specified ratio. SOLUTION: This composition comprises 100 pts.wt. polyamide resin, 0.1-50 pts.wt. polycarbonate resin, 0-50 pts.wt. polyethylene terephthalate and 0.1-30 pts.wt. red phosphorus having a conductivity of 0.1-1,000μS/cm. The conductivity of the red phosphorus is the conductivity of the aqueous extract obtained by adding 5 g of red phosphorus to 100 ml of deionized water, extraction-treating the red phosphorus at 121 deg.C for 100 hr and diluting the filtrate left after the filtration of red phosphorus to 250 ml. The red phosphorus used is desirably one coated with a thermosetting resin, especially, a thermoplastic phenolic resin. It is desirable that the composition additionally contains 5-140 pts.wt. per 100 pts.wt. polyamide resin. |
