Nomenclature
Polysulfide rubber; thiorubber. Description and references
Polysulfide polymers prepd from dihaloalkanes
and sodium polysulfide. Reviews of prepn, chemistry and applications:
Berenbaum in High Polymers, H.
Mark et al., Eds., vol. 13 entitled Polyethers part 3, N. G. Gaylord,
Ed. (Interscience, New York, 1962) pp 43-114; Panek, ibid. pp 115-224; Berenbaum in Encyclopedia of
Polymer Science and Technology vol. 11 (Interscience,
New York, 1969) pp 425-447.
Derivative
Thiokol A.
Nomenclature
Ethanite; Perduren. Properties
The first commercial polysulfide polymer, prepd
from ethylene dichloride and sodium polysulfide. Sulfur content 84%; d about 1.6. Mixes with
natural rubber. Cured polymer retains unpleasant odor; irritating
fumes evolve during manuf. Stable to the usual organic solvents and
dil mineral acids. Unstable to alkalies and oxidizing substances.
Of low tensile strength and abrasion resistance. Not recommended
where tropic or arctic climates prevail.Derivative
Thiokol FA.
Properties
Prepd from ethylene dichloride, dichlorodiethyl
formal and sodium polysulfide. Sulfur content 47%; d 1.34. No odor. Excellent solvent
resistant characteristics but not as good as Thiokol A. Low temperature
flexibility to 50°F.Use
In rubber and resin manuf. As lining for flexible
oil pipes and self-sealing gasoline tanks.