Flame retardant copolycarbonates

Details Flame retardant copolycarbonates Flame retardant copolycarbonates

1978-10-13

1980-03-25

Pertilla, Theodore E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528128, 528166, 528174, 528196, 528198, 528202, C08G 6362

Patent

active

041951565

ABSTRACT:
Flame retardant, thermoplastic copolycarbonates are made from dihydric aromatic compounds and dihydroxy benzene mono or di sulfonic acids in their alkali metal salt form. The copolycarbonates of this invention are more effective as fire retardants than the alkali metal salts of sulfonated polycarbonates prepared from dihydric aromatic compounds alone.

REFERENCES:
patent: 3043800 (1962-07-01), Schnell et al.
patent: 3933734 (1976-01-01), Mark et al.
patent: 3978024 (1976-08-01), Mark

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