Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1995-12-21
1997-09-30
Acquah, Samuel A.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
528176, 528190, 528193, 528194, 528272, 528361, 528491, 528502, 528503, 264164, 264165, 264291, 264330, 428332, B32B 2736, C08G 6300, B29C 5100
Patent
active
056724268
ABSTRACT:
A process for making a transparent film comprising a liquid crystalline polymer, and a transparent film made thereby having high barrier properties. In this process, the LCP is dissolved in an appropriate solvent, then cast into a film at ambient or near-ambient temperatures. The film optionally may be dried at elevated temperatures and/or reduced pressures to remove the solvent. The film is then annealed at a temperature between the glass transition temperature (T.sub.g) and the melting point temperature (T.sub.m) of the polymer. The result is a highly transparent film having liquid crystalline morphology and high barrier properties.
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patent: 4624872 (1986-11-01), Stuetz
patent: 4942087 (1990-07-01), Motooka et al.
patent: 5298591 (1994-03-01), Choe
Kim et al. Polym. J (Tokyo) (1991), 23(11), 1339-45.
Castrell et al. Polymer Preprints, vol. 34, #1 (1993).
Polymer Preprints, vol. 34, No. 1 (Mar. 1993) "The Effect of Thermal Annealing on the Sorption and Transport Behavior of Liquid Crystalline Polymeric Barrier Materials", By G. R. Cantrell, B. D. Freeman and H. B. Hopfenberg, Department of Chemical Engineering, North Carolina State.
Chenevey Edward C.
Haider M. Ishaq
Jaffe Michael
Makhija Subhash
Acquah Samuel A.
Hoechst Celanese Corp
McGinnis James L.
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