Polybenzazole fibers having improved tensile strength retention

Details Polybenzazole fibers having improved tensile strength retention Polybenzazole fibers having improved tensile strength retention

1994-12-29

1996-09-03

Dodson, Shelley A.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

528322, 528327, 528331, 528340, B32B 502, C08G 7322

Patent

active

055522211

ABSTRACT:
Described is a method for preparing a polybenzazole filament which comprises extruding a polybenzazole dope filament, drawing the filament across an air gap, coagulating and washing the filament, and drying the filament, characterized in that a solution of a compound selected from the group consisting of ferrocenes, ruthocene, iodide-, cobalt-, and copper-containing compounds, dyes, and mixtures thereof is contacted with a filament subsequent to the washing step and prior to the drying step. This method provides a means to improve the tensile strength retention of damaged polybenzazole filaments following exposure to sunlight.

REFERENCES:
patent: 3942950 (1976-03-01), Powers et al.
patent: 4048139 (1977-09-01), Calundann et al.
patent: 4112016 (1978-09-01), Moulds
patent: 4525384 (1985-06-01), Aoki et al.
patent: 4680221 (1987-07-01), Murayama et al.
patent: 4707231 (1987-11-01), Berger
patent: 4857244 (1989-08-01), Berger
patent: 4913938 (1990-04-01), Kawakami et al.
patent: 4961971 (1990-10-01), Pike
patent: 5017420 (1991-05-01), Marikar et al.
patent: 5021258 (1991-06-01), McGarry
patent: 5296185 (1994-03-01), Chau et al.
Chemical Abstract 81:122715e (1974).
Chemical Abstract 84:152122 (1976).
Chemical Abstract 84:152123 (1976).
Chemical Abstract 90:122950 (1978).
Chemical Abstract 109:192065p (1988).
Chemical Abstract 110:136646 (1988).
Chemical Abstract 111:234961 (1989).
Chemical Abstract 112:22285 (1989).
Chemical Abstract 114:63308z (1990).
Derwent 82079W/50 (1975).
Derwent 86-039623/06 (1985).
Derwent 86-321415/49 (1986).
Derwent 89-073458/10 (1989).
Derwent 89-140892/19 (1989).
Derwent 91-234174/32 (1991).
Research Disclosure 19528 (1980).
McGarry et al., Ceramic Coated Rigid Rod Polymer Fibers, Sampe Quarterly, 23(4), pp. 35-38 (1992).
Rabek, Jan F., Mechanisms of Photphysical Processes and Photochemical Reactions in Polymers, pp. 329-330 (1987).
Schmitt et al., Investigation of the Protective Ultraviolet Absorber in a Space Environment, Journal of Applied Polymer Science, vol. 7, pp. 1565-1580 (1963).

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