Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Patent
1988-02-22
1990-04-10
Doll, John
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
4234472, 4234474, 4234476, 4234478, 423448, 264292, D01F 912
Patent
active
049159267
ABSTRACT:
Carbon fibers having balanced properties comprising an ultra-high modulus greater than 100 Mpsi and a high tensile strength of greater than 500 kpsi. The carbon fibers are derived from a solvent fractionated pitch having a mesophase content of greater than 90% by weight and a quinoline insolubles content of less than 1% by weight. A crude pitch feed is sequentially heat soaked, solvent fractionated, and extruded to form as-spun fibers. The latter are stabilized or infusibilized and then carbonized by multistage heat treatments involving separate precarbonization, carbonization, and graphitization steps with an intermediate cooling step.
REFERENCES:
patent: 3304148 (1967-02-01), Gallagher
patent: 3454362 (1969-07-01), Spry
patent: 3503708 (1970-03-01), Spry
patent: 3634035 (1972-01-01), Stuetz et al.
patent: 3673035 (1972-06-01), Whitney
patent: 3869429 (1975-03-01), Blades
patent: 3899574 (1975-08-01), Sliva et al.
patent: 4005183 (1977-01-01), Singer
patent: 4016247 (1977-04-01), Otani et al.
patent: 4138525 (1979-02-01), Schulz
patent: 4184942 (1978-05-01), Angieu et al.
patent: 4208267 (1980-06-01), Diefendorf et al.
patent: 4277324 (1981-07-01), Greenwood
patent: 4301136 (1981-11-01), Yamamoto et al.
patent: 4351816 (1982-09-01), Schulz
patent: 4402928 (1983-09-01), Lewis et al.
patent: 4431623 (1984-02-01), Fug
patent: 4504454 (1985-03-01), Riggs
patent: 4516811 (1986-03-01), Riggs et al.
patent: 4526770 (1985-07-01), Pepper et al.
patent: 4527754 (1985-07-01), Flynn
patent: 4529498 (1985-07-01), Watanabe
patent: 4533535 (1985-08-01), Uemura et al.
patent: 4574077 (1986-03-01), Uemura
patent: 4576810 (1986-03-01), Redeck
patent: 4608402 (1986-08-01), Redick et al.
patent: 4624102 (1986-11-01), Bell, Jr.
patent: 4628001 (1986-12-01), Sasaki et al.
patent: 4639347 (1986-01-01), Hancock et al.
patent: 4670129 (1987-06-01), Tate et al.
patent: 4681911 (1987-07-01), Chang
patent: 4689947 (1987-09-01), Winckler
patent: 4705618 (1987-11-01), Tsuchitani et al.
Guigon et al., "Prel. Studies of Mesophase Pitch-Based Carbon Fibers", Composites Science and Technology 25 (1986) 231-224, Amoco Technical Bulletin F 7007, Rev. 1.
Leonard S. Singer, "Carbon Fibers from Mesophase Pitch", Fuel, 1981, vol. 60, Sep., pp. 839-847.
David A. Schulz, "Advances in UHM Carbon Fibers", Sampe Journal, Mar./Apr., 1987, pp. 27-31.
L. Fischer et al., "The Influence of Graphetization . . . ", Colloid & Polymer Science, 258, 917-922 (1980).
Smith et al, "Laser Generation of Ultrasound . . . ", Polymer Communications, 1987, vol. 28, Jan.
J. D. H. Hughes, "Strength and Modulus of Current . . . ", Carlson, vol. 24, No. 5, pp. 551-556 (1986).
Doll John
E. I. DuPont de Nemours and Company
Kunemund Robert M.
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