Abstract: An improved process is disclosed for preparing flame retardant polyamide molding resins containing melamine cyanurate as a flame retarding agent which results in products with improved mechanical properties and good flame retarding properties. It comprises the addition of a glycol and a phthalate ester to the process wherein a polyamide, melamine or derivatives thereof and cyanuric acid are melt-blended in the presence of water.

Abstract: The present invention relates to a foamable alloy composition comprising, a styrenic polymer including its copolymers and rubber reinforced styrenic polymers in combination with a styrene maleic anhydride interpolymer and a gas liberating compound wherein said interpolymer is present in said polyblend in amounts of 15 to 50% by weight providing a superior structural foam molding composition having fast molding cycles and fine cell structure.

Abstract: Disclosed herein is a method for preparing fire retardant styrenic polymer molding compositions with improved impact strength which compositions contain a metal oxide and a halogenated fire retardant additive. The method comprises dispersing the metal oxide into a minor portion of the styrene polymer component using high intensity mixing and temperatures at or above the fusion temperature of the styrene polymer in order to obtain a uniform dispersion. The metal oxide-polystyrene dispersion is then blended with the other ingredients of the polyblend. The resulting blend is compounded at temperatures greater than 255.degree. C. and then comminuted to form a molding composition.