| abstract |
Thermoplastic compsns. consisting of a mixt. of (A) polyolefins, (B) 2-10 parts Sb2O3 or Sb2S3, (C) 2-20 parts post-chlorinated PVC with Cl content of 65-68 wt.% and mol. wt. over 50,000, and (D) a synergistic redox system of 1-4 parts metal cpds. and 0.5-2.5 parts organic cpds. as stabiliser. Permanent flame-retardant props. are obtd. without problems of toxicity, bloom, etc. Pref. (D) consists of (1) inorganic lead salts, lead salicylate and organic lubricant, (2) organic tin cpds., low-molecular PE and a UV-absorber, or (3) organic salts of Ca/Mg, epoxidised soya oil, natural hard wax and a UV-absorber. |