Flame resistant linear polyesters

Details Flame resistant linear polyesters Flame resistant linear polyesters

1975-07-07

1976-06-01

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4575B, 260 4595G, 260 75H, C08J 320, C08G 6346

Patent

active

039608069

ABSTRACT:
Flame-retardant polyester filaments of excellent whiteness are prepared from dimethyl terephthalate, ethylene glycol and 2,2-bis-[4-(2-hydroxyethoxy)-3,5-dibromophenyl] propane by a continuous process as illustrated in the drawing. Conducting the polymerization within a holdup time of 2.5 hours at temperatures from about 273.degree. to about 290.degree. C. is shown to provide flame-retardant filaments having excellent whiteness. Addition of 7-naphtha-triazinyl-3-phenylcoumarin and a blue toner further improve the whiteness value and the inclusion of antimony oxide provides even greater flame retardance.

REFERENCES:
patent: 2902518 (1959-09-01), Hurdis et al.
patent: 3400174 (1968-09-01), Heidel et al.
patent: 3651017 (1972-03-01), Tanabe et al.
patent: 3712904 (1973-01-01), Bode et al.
patent: 3749600 (1973-07-01), Bergman et al.

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