Compositions having reduced smoke emission
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United States of America Patent
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-
Sep 20, 1988
Grant Date -
N/A
app pub date -
Dec 22, 1987
filing date -
Dec 23, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A smoke suppressant for reducing smoke emission when a flammable organic material is heated above its decomposition temperature or ignited comprises a liquid heterocyclic polysulphide compound having the formula R--S.sub.x --Z--S.sub.x' --R' (I) where R is an organic group containing 1 to 12 carbon atoms, R' is hydrogen or an organic group containing 1 to 12 carbon atoms, x is at least 2, x' is 1 or more when R' is hydrogen and is at least 2 when R' is an organic group and Z is a divalent radical derived from a heterocyclic compound, preferably a sulphur-containing heterocyclic compound such as thiadiazole. The compound (I) may contain dissolved or dispersed elemental sulphur. The smoke suppressant is particularly suitable for use in polyurethane foams.
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