Process for preparing film of poly{[benzo(1,2-d:4,5-d')bisthiazo

Details Process for preparing film of poly{[benzo(1,2-d:4,5-d')bisthiazo Process for preparing film of poly{[benzo(1,2-d:4,5-d')bisthiazo

1983-04-11

1984-12-11

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Utilizing special inert gaseous atmosphere or flushing mold...

264184, 2642104, 264216, 264233, 2642356, 26433112, 528183, 528185, 528337, 528351, B29D 720

Patent

active

044877358

ABSTRACT:
A film of poly{[benzo(1,2-d:4,5-d')bisthiazole-2,6-diyl]-1,4-phenylene}, its cis isomer or mixtures thereof is formed by extruding a solution of the polymer on a casting roll which is rotating to yield a surface speed slightly greater than the rate of extrusion. The solution of the polymer may be prepared by dissolving the polymer in an appropriate solvent or by reacting the monomers in a selected reaction medium. The cast film is washed, subjected to an elevated temperature, preferably heat treated under tension, and recovered.

REFERENCES:
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patent: 3574170 (1971-04-01), Chenevey
patent: 4051108 (1977-09-01), Helminiak et al.
patent: 4148774 (1979-04-01), Silver
patent: 4225700 (1980-09-01), Wolfe et al.
patent: 4359567 (1982-11-01), Evers
patent: 4377546 (1983-03-01), Helminiak et al.
patent: 4405550 (1983-09-01), Hungerford
patent: 4423202 (1983-12-01), Choe

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