Copolyester compositions for the production of fibers having hig

Details Copolyester compositions for the production of fibers having hig Copolyester compositions for the production of fibers having hig

1976-09-30

1979-03-06

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4575F, 260 4575K, 528166, 528177, 528180, 528181, 528190, 528191, 528194, 528201, 528202, C08G 6318, C08G 6366, C08G 6376

Patent

active

041430310

ABSTRACT:
There is described a family of copolyester compositions for producing heat nd flame resistant fibers, said compositions being prepared by polycondensating (A) an aromatic diacid, (B) a diol, (C) a tetrabrominated diol, (D) a derivative of a polyvalent metal, all said components being hereinbelow defined, the polycondensation process being carried out in several successive stages of copolycondensation of components (A), (B) and (C) until reaching a stable viscosity, then adding component (D), and stopping the reaction before the intrinsic viscosity of the composition decreases below a value proper for subsequent spinning.

REFERENCES:
patent: 3794617 (1974-02-01), Mains et al.
patent: 3935166 (1976-01-01), Kanai et al.

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