High tenacity and high toughness acrylic sulfide fibers, a proce

Details High tenacity and high toughness acrylic sulfide fibers, a proce High tenacity and high toughness acrylic sulfide fibers, a proce

1989-09-25

1996-03-26

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

5230917, 428463, 523152, 523157, 524 3, C08J 712, C08J 514

Patent

active

055020909

ABSTRACT:
The present invention relates to acrylic sulfide fibers whose tensile strength is at least 3.5 g/d, toughness expressed by TE.sup.1/2 product of tensile strength (T g/d) and a square root of tensile elongation (E %), is higher than 10 and sulfur content is higher than 0.5 weight %, a process for producing acrylic sulfide fibers characterized by heating acrylic fibers whose tensile strength is at least higher than 7 g/d in sulfur-containing atmosphere, and composite materials being reinforced with above described acrylic sulfide fibers.
Acrylic sulfide fibers obtained have high tenacity and high toughness as well as excellent heat resistance, anti-flammability and alkali resistance.
Therefore, above described acrylic sulfide fibers are useful for such applications as heat resistant and flame resistant spun-woven products, reinforcing cement cured in an autoclave and abrasive materials as asbestos substituting fibers.

REFERENCES:
patent: 2563662 (1951-06-01), Rothrock
patent: 3369008 (1968-02-01), Hurwitz
patent: 3748301 (1973-07-01), Kuhar
patent: 4113847 (1978-09-01), Fukushima et al.
patent: 4265628 (1981-05-01), Rossi
patent: 4306911 (1981-12-01), Gordon
patent: 4414031 (1983-11-01), Studinka
patent: 4654381 (1987-03-01), Kang
patent: 4678818 (1987-07-01), Nakagawa
Condensed Chem Dict, Reinhold Co (NY), 1987, p. 19.
"Carbon Fiber", by Sugiro Ohtani et al., Jul. 1, 1983 (no translation provided).

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