Tetrametaphosphimic acid and derivatives as flame retardants
AssigneeThe Firestone Tire & Rubber Company
InventorDavid F. Lawson
Life of this patent
Estimating the term…
Abstract
Tetrametaphosphimic acid [HNPO(OH)].sub.4.XH.sub.2 O and its salts are useful as flame retardants, for synthetic resins and natural materials.
Claims9
A process for preparing a burn-resistant composition which comprises admixing between 0.2 and 20 parts by weight of tetrametaphosphimic acid or its salts with each 100 parts by weight of a burnable synthetic resin or natural material, the burn resistance of which is to be improved.
Silica filled polybutadiene articles rendered burn resistant by the incorporation therein of tetrametaphosphimic acid or its salts.
A burn-resistant article comprising between 0.2 to 20 parts by weight of tetrametaphosphimic acid or its salts and 100 parts by weight of a burnable synthetic resin or natural material.
Dependencies are inferred from the claim text.