Preceramic additives as fire retardants for plastics
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsJOSEPH D. LICHTENHAN, JEFFREY W. GILMAN
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Abstract
An ecological fire retardant blend of thermoplastics is provided. That is, to one or more organic polymers is added one or more preceramic oligomers or preceramic polymers to provide a blend of polymers of reduced flammability which do not significantly increase the levels of smoke, carbon monoxide or other toxics during combustion. In one example a preceramic polymer, eg. a polysilane resin is added to a polyolefin to provide an ecological fire retardant blend per the invention.
Claims13
A method for enhancing the fire resistivity of plastics comprising adding at least one preceramic polymer to at least one organic plastic to reduce the flammability thereof and form a polymer-plastic blend, wherein said preceramic polymer is selected from the group of polycarbosilanes (PCS), polysilanes (PS), polysilsesquioxane (PSS) resins and polyhedral oligomeric silsesquioxane (POSS) monomers, polymers and copolymers.
A method for enhancing the fire resistivity of plastics comprising adding preceramic polymers to organic plastics and mixing same to obtain a blend of reduced flammability.
Dependencies are inferred from the claim text.