Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
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.
Ciaperoni Aldemaro
Dall'Asta Gino
Quaglia Giuseppe
Lee Lester L.
SNIA Viscosa Societa Nazionale Industria Applicazioni Viscosa S.
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