Thermally stable polyphosphonates as flame retardants

Details Thermally stable polyphosphonates as flame retardants Thermally stable polyphosphonates as flame retardants

1973-05-29

1977-08-09

Schofer, Joseph L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 2P, 260885, 260DIG24, 526275, C08F25900, C08F27500

Patent

active

040411079

ABSTRACT:
A thermally stable flame-resistant phosphonate polymer of the structure ##STR1## WHEREIN R.sup.1 is methyl or ethyl, R.sup.2 is hydrogen or methyl and n is 3 to 100, is formed by the reaction of acrylic or methacrylic acid with an alkyl bicyclic phosphite of the structure ##STR2## wherein R.sup.1 is as above. The phosphonate polymer is useful in forming flame-resistant acrylic compositions such as molding powders and sheets from mixtures comprising the polymer and methyl methacrylate.

REFERENCES:
patent: 3155630 (1964-11-01), Emmons et al.
patent: 3155705 (1964-11-01), Emmons et al.

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