Smoke and flame retarded styrene polymers
AssigneeThe Firestone Tire & Rubber Company
InventorsDavid Francis Lawson, Edward Leo Kay
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Abstract
The evolution of smoke and the development of flame are retarded by the incorporation of hydrated magnesium oxychloride into organic polymers which contain aromatic components, particularly polymers and copolymers of styrene. The hydrated magnesium oxychloride has the added advantage that it has low tinting strength, i.e., does not greatly change the color or appearance of the polymers.
Claims4
A smoke and flame inhibited composition containing (a) 100 parts by weight of a polymeric material selected from butadiene-styrene elastomer, high impact polystyrene, polystyrene and copolymers of styrene with a monoethylenically unsaturated nitrile, (b) 30-200 parts hydrated magnesium oxychloride per 100 parts said polymer, said copolymer containing at least 10% by weight aromatic groups derived from styrene.
Dependencies are inferred from the claim text.