Process for reducing black specks in a thermotropic liquid cryst

Details Process for reducing black specks in a thermotropic liquid cryst Process for reducing black specks in a thermotropic liquid cryst

1996-12-10

1998-06-09

Warden, Jill

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

134 2219, 134 26, B08B 302, B08B 308

Patent

active

057627185

ABSTRACT:
A process for reducing black specks in anisotropic melt-phase forming liquid crystal polymer which comprises the steps of subjecting a reactor in which an anisotropic melt-forming polymer was formed to successive washes of triethylene glycol, ethylene glycol and at least one water wash, draining the reactor between washes, and drying the reactor after the water wash.

REFERENCES:
patent: 2917418 (1959-12-01), Cathcart
patent: 3475218 (1969-10-01), Torrenzano et al.
patent: 3485670 (1969-12-01), Fisher
patent: 3740267 (1973-06-01), Haylock
patent: 3928253 (1975-12-01), Thornton et al.
patent: 4371485 (1983-02-01), Mathes et al.
patent: 5041525 (1991-08-01), Jackson
patent: 5328982 (1994-07-01), Tindall

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