Abstract: A flame and smolder resistant cellulosic insulation material, method of tting loose-fill cellulosic material, and composition for imparting flame and smolder resistance to such materials are disclosed with the combination of from about 2 to 9% sulfur and from about 10 to 25% flame retardant uniformly distributed in the cellulosic insulation material based on the weight of cellulosic material.

Abstract: A flame resistant cellulosic insulation material, method of treating loosll cellulosic material and compositions for imparting flame resistance and flame and smolder resistance to such materials are disclosed utilizing thiocyanate compounds interstitially distributed throughout the cellulosic insulation material as a flame retardant. Sodium and potassium thiocyanate are used in extremely small quantities in insulation materials and impart flame resistance due to the hygroscopic migration of the compounds into the insulation material. The effectiveness of such small quantities of thiocyanate make possible the addition and retention of effective amounts of powdered smolder inhibitors such as boric acid, and sulfur.

Abstract: Disclosed is a smolder resistant upholstered furniture or mattress assembly nd a method for rendering the composite materials of such assembly smolder resistant. Placement of a layer of sulphur immediately adjacent a normally smolder-prone material in the composite effectively prohibits the advances of smoldering combustion to a dangerous stage. The sulphur layer is advantageously applied by backcoating the fabric overlay, coating or impregnating the fibrous or polyurethane foam materials or separating layers of such materials with sulphur-containing films, fabrics and the like. An advantageously effective amount of sulphur is from about 25-50 g/m.sup.2 to about 250-300 g/m.sup.2 in a layer having a depth of about 1 to 3 mm.