FIRE RETARDANT THERMOPLASTIC POLYMER COMPOSITIONS OF A METHYL METHACRYLATE POLYMER WITH A COPOLYMER OF A HALOGENATED ETHYLENICALLY UNSATURATED MONOMER AND A PHOSPHOROUS CONTAINING VINYL MONOMER

摘要

Self-extinguishing, thermoplastic polymer compositions are prepared by the intimate admixture of a thermoplastic polymer with a copolymer of a halogen containing ethylenically unsaturated monomer and a phosphorus containing vinyl monomer, particularly a bis(hydrocarbyl)vinylphosphonate. The thus modified thermoplastic polymers display a high degree of flame retardance without any substantial changes in their physical properties including, for example, their clarity and hardness and the resulting compositions may be safely employed in any application requiring their possible exposure to fire or high temperatures.