Fire retardant concentrate

US4496681A · kind A · utility

Assignee

• Atlantic Richfield Company · US

Inventor

• Frank E. Lordi · West Chester, US

Key dates

• Filing date: Dec 31, 1980
• Grant date: Jan 29, 1985
• Expiry date: Dec 31, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L53/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Pellets of a concentrated composition suitable for blending with pellets of styrene-maleic anhydride resins in an extruder are prepared by dispersing an ether having two brominated phenyl groups and a lesser amount of antimony trioxide in a radial block copolymer of about 50% to about 80% vinyl aromatic compound and about 20 to 50% alkadiene, there being from about 10 to about 25% antimony trioxide, from about 30 to about 45% brominated phenyl ether having two brominated phenyl groups and from about 45% to about 55% radial block copolymer, said concentrated composition containing from about 0.05% to about 5% modifiers comprising an antioxidant phenol having sterically hindering alkyl substituents.