Abstract: A method of making a dry, solid, powdered flame retardant composition is disclosed. Polyvinyl chloride is mixed with about 20 to about 150 phr of a liquid flame retardant having the general formula at a temperature of about 50 to about 100° C., where R1 and R2 are independently selected from aliphatic from C2 to C20. Also disclosed are a dry, solid, powdered flame retardant composition made by this method, a method of making a flame retardant polymer by compounding that dry, solid, powdered flame retardant composition with a polymer, and a flame retardant polymer made by that method.

Abstract: A dehydrated mixture of hydrated sodium antimonate and ionomer polymer flame retard a polymer or resin composition such as film, fiber, electrical connection and molded part. From 10 to 90 parts sodium antimonate containing 3% moisture mixed with 10 to 90 parts ionomer polymer or polyethylene or ethylene vinyl acetate are added to a single screw vented extruder to produce pellet concentrate with a 0.1% moisture content for flame proofing PET. A composition may be prepared in a single or twin screw extruder or in a high shear blender in the presence of glass fiber by adding a dehydrated mixture of an alkyl tertabromophtalate and sodium antimonate and brominated polystyrene to polyethylene terephthalate or polybutylene terephthalate. A preferred temperature range for dehydration of hydrated sodium antimonate in the presence of a polymer is between 150° C. and 250° C.

Abstract: A colloidal dispersion of hydrous antimony pentoxide particles is made by a process which comprises introducing a particulate antimony component selected from the group consisting of antimony metal and antimony trioxide into an essentially aqueous medium and contacting said antimony component with hydrogen peroxide at a temperature of from about 0.degree. C. to about the decomposition temperature of the reaction mixture for a length of time sufficient to convert at least a portion of the antimony component to colloidal particles of hydrous antimony pentoxide.