Sb2O3 is one of the most important antimony compounds which has a large number of industrial applications.
Temperature 120[degrees]C in all reactions Catalyst 0.2% [Sb.sub.2][O.sub.3] (Antimony trioxide
) Total reaction time 10 h Pressure Gradual fall up to absolute vacuum Solvent Distilled water Stirring speed 300 rpm TABLE 2.
It has been shown that adding the antimony trioxide
of 7 wt% results in a slight increase in toxicity, whereas in case of the sample consisting of 14 wt%, toxicity drops reaching the best result from all studied materials.
Incorporated in 1988, CCPL is engaged in the manufacture of antimony trioxide
, an inorganic compound used as a flame retardant and catalyst in the manufacture of polyester.
Key flame retardants and material groups considered in the study include Alumina Trihydrate (ATH), brominated, chlorinated, phosphorus-based, Antimony Trioxide
, and others (melamine-based, zinc-based, and magnesium hydroxide).
"Dry blends" were first prepared, by absorbing the plasticizer composition in PVC powder, as follows: (a) mixed all ingredients except plasticizer, clay and antimony trioxide
in a container using a spatula; (b) warmed up a 40 [cm.sup.3] Brabender mixing bowl with sigma blades at 90[degrees]C and 40 rpm for 2 min; (c) added the hand-mixed ingredients to the mixing bowl and mixed for 30 sec; (d) added the plasticizer to the mixing bowl, mixed for 6 min (with 50 phr or 52 phr plasticizer) or 10 min (with 83 phr plasticizer), and recorded time for complete plasticizer absorption by visual observation (i.e., dry blend time); (e) for filled compositions, added clay and/or antimony trioxide
and mixed for 60 sec; and (f) stopped and removed the dry blend.
As regards the modification of epoxy material by antimony trioxide
, time to ignition is much longer at a heat exposure of 30 kW/[m.sup.2] as compared to unmodified Epidian 561.
is the product of choice in masterbatch formulations, although others such as zinc borate and zinc molybdate can be used as well.
is a suspected carcinogen and is considered a priority pollutant by the U.S.
(a) Chemical NOAEL Quantal end point Antimony trioxide
(b) 0.51 ([0.42.sub.HEC]) (U.S.
is a Belgian producer of high-grade antimony trioxide