Process for preparing phenolic filaments

Details Process for preparing phenolic filaments Process for preparing phenolic filaments

1974-10-22

1976-08-03

Bleutge, John C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

81155, 260 54, 260 55, 260 56, 260 59R, 260843, 260847, 260848, 264176F, 264236, 264347, D06M 1312, D06M 1316, D06M 1320

Patent

active

039729591

ABSTRACT:
A process for producing melt-spun and cured phenolic filaments having improved tenacity and whiteness which comprises treating cured phenolic filaments with an alcohol having 1 to 6 carbon atoms or acetone and reacting the thus-treated phenolic filaments with an esterifying solution containing acetic anhydride in the presence of an inorganic acid of phosphorus as an esterifying catalyst.

REFERENCES:
patent: 3716521 (1973-02-01), Economy et al.
patent: 3808289 (1974-04-01), Okuhashi et al.
patent: 3848044 (1974-11-01), Hagiwara et al.

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