Flame-retarted transparent plastics
AssigneeBromine Compounds Ltd.
InventorsIta Finberg, Lev Utevski
Life of this patent
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Abstract
Flame-retarded transparent plastic compositions comprising polyhalgenated trimethylphenyl indan. The polyhalogenated trimethylphenyl indan is a mixture of polyhalogenated trimethylphenyl indanes having each 3 to 9 halogen atoms. The halogen may be bromine or a mixture of bromine and chlorine. The transparent plastic is selected from polycarbonate, polymethylmethacrylate, and polystyrene. The polyhalogenated trimethylphenyl indan is present in an amount of up to about 40% by weight. The transparent plastic flame-retarded material is prepared by mixing the plastic matrix with a flame-retardant effective amount of a polyhalogenated trimethylphenyl indan.
Claims15
A transparent plastic composition consisting essentially of a plastic matrix selected from the group consisting of polycarbonate, polymethylmethacrylate and polystyrene, and a flame retardant comprising at least one polybrominated trimethylphenyl indane.
A method for the production of a transparent plastic composition comprising the steps of:
- providing pellets of a plastic matrix selected from the group consisting essentially of polycarbonate, polymethylmethacrylate and polystyrene, mixing said pellets with a powder of a polybrominated trimethylphenyl indane, and compounding said mixture in an extruder.
A method for the production of a transparent plastic composition comprising the steps of:
- mixing a polymeric matrix selected from the group consisting of polycarbonate, polymethlymethacrylate and polystyrene, with an amount of polybrominated trimethylphenyl indane effective to render said transparent plastic material flame retarded.
Dependencies are inferred from the claim text.