Process for coagulation and washing of polybenzazole fibers

Details Process for coagulation and washing of polybenzazole fibers Process for coagulation and washing of polybenzazole fibers

1993-08-20

1995-02-28

Kight, III, John

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26433111, 264341, 264343, 264344, 264345, 528293, D01F 600

Patent

active

053934784

ABSTRACT:
Fibers spun from polybenzazole dopes can quickly be washed to remove polyphosphoric acid by a combination of initially washing with an acidic liquid and second washing with a hot leaching fluid at at least about 60. The process can reach acceptable residual phosphorous levels (1500-2000 ppm) in as little as about 2 or 3 minutes.

REFERENCES:
patent: 3760054 (1973-09-01), Moulds
patent: 4263245 (1981-04-01), Tan
patent: 4377546 (1983-03-01), Helminiak et al.
patent: 4487735 (1984-12-01), Chenevey et al.
patent: 4533693 (1985-08-01), Wolfe et al.
patent: 4581437 (1986-04-01), Mammone
patent: 4606875 (1986-08-01), Chenevey et al.
patent: 4772678 (1988-09-01), Sybert et al.
patent: 4845150 (1989-07-01), Kovak et al.
patent: 4876077 (1989-10-01), Murakami
patent: 4915984 (1990-04-01), Murakami
patent: 4973442 (1990-11-01), Harvey et al.
patent: 4977223 (1990-12-01), Arnold et al.
patent: 4985193 (1991-01-01), Allen
patent: 5288445 (1994-02-01), Tani et al.
patent: 5288452 (1994-02-01), Yabuki
patent: 5292469 (1994-03-01), Bowman et al.
patent: 5292470 (1994-03-01), Reddy et al.
Chemical Abstract 111: 196226f (p. 59).
W. W. Adams et al., AFWAL-TR-864011, Processing, Properties, Structure, and Morphology of PBO and ABPBO Polymer Fibers, Aug. 1986.

Affiliated with

Also associated with

Rating

Process for coagulation and washing of polybenzazole fibers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for coagulation and washing of polybenzazole fibers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for coagulation and washing of polybenzazole fibers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-846700