| 摘要 |
<p>A flame retardant composition which includes (A) 100 parts by weight of a flame retardant resin mixture of from 30 to 80 weight percent of a styrene series (A1) wherein the reduced viscosity of a methyl ethyl ketone-soluble component is from 0.2 to 0.55 dl/g in an N,N-dimethylformamide solution at 30 DEG C and a concentration of 0.3 g/dl, and from about 70 to about 20 weight percent of a vinyl chloride resin (A2) having an average polymerization degree of from 400 to 800, (B) from about 0.5 to about 6 parts by weight of a heat stabilizer, the volatile loss of which after the heating to 240 DEG C for one hour in air is not more than 50% by weight, and (C) from about 0.1 to about 5 parts by weight of a lubricant, the volatile loss of which after heating to 240 DEG C for one hour in air is not more than 50% by weight. The composition is particularly suitable for production of impact resistant, flame retardant molded articles by injection molding, since articles molded therefrom do not suffer from flash or appearance problems such as black stripes. The composition has excellent hot runner moldability and does not attach to the mold.</p> |
