Process for stabilization of polymer compositions
OwnerHayder Zahalka, Marshall Mooreinventors
Life of this patent
Estimating the term…
Abstract
Stabilized flame retardant polymer compositions containing a hydrated metal compound, e.g., a metal hydroxide, as a flame retardant, when added an effective stabilizing amount of an amine oxide, a hydroxyl amine or mixtures thereof, exhibit desirable physical characteristics of pure polymers due to the stabilizer additives, including excellent color stability, while attaining desirable fire-retardance standards.
Claims19
A stabilized flame retardant composition comprising:
- at least one of a polymer resin;
- about 5 to 300 parts by weight of a hydrated metal compound per 100 parts by weight of said polymer resin;
- an effective stabilizing amount of a synergistic mixture of:
- a) a first stabilizer comprising at least one compound selected from the group consisting of:
- amine oxide stabilizers, hydroxylamine stabilizers, nitrone stabilizers, nitroxyl stabilizers, benzofuranone stabilizers;
- quinone methide stabilizers, and monoacrylate esters of 2,2′-alkylidenebisphenol stabilizers;
- and
- b) a second stabilizer comprising at least one compound selected from the group consisting of phosphite and phosphonite stabilizers.
A process for the stabilization of a composition comprising at least a polymer resin and about 1 to 100 parts by weight of a hydrated metal compound per 100 parts by weight of said polymer resin, said process comprising adding to a polymer resin composition an effective stabilizing amount of a stabilizer additive selected from one of an amine oxide or a hydroxyl amine.
A process for forming articles having improved melt stability and color stability, said process comprising the steps of:
- a) melt blending a composition comprising:
- at least one of a polymeric resin;
- about 1 to 100 parts by weight of a hydrated metal compound per 100 parts by weight of said polymeric resin;
- and
- an effective stabilizing amount of a synergistic mixture of a first stabilizer additive selected from one of an amine oxide or a hydroxyl amine and a second stabilizer additive selected from one of a phosphite or phosphonite stabilizer;
- b) forming shaped articles thereof from said blend.
Dependencies are inferred from the claim text.