Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – With charge transferring layer of specified composition
Patent
1992-03-13
1993-12-28
Krass, Frederick
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
With charge transferring layer of specified composition
525481, 525482, 525483, 525484, 525523, 525526, 525534, 528 89, 528 90, 528 93, 528 94, 528102, 528103, 528104, 528107, 528108, 528109, 528111, 528113, 528114, 528117, 528118, 528120, 528123, 528124, 528250, 528341, C08G 5900, C08G 5940, G02F 100
Patent
active
052737926
ABSTRACT:
The present invention is directed to a novel epoxy polymeric composition resulting from reacting (A) at least one compound containing an average of more than one epoxide group per molecule with (B) at least one curing agent for component (A). At least a portion of the curing agent (B) is at least a first curing agent compound which contains (a) an average of more than one active amine hydrogen atom per molecule and (b) an average of at least one aromatic ring which contains at least one pendant monovalent electron withdrawing group. The present invention also includes a process for preparing the above polymeric materials. The polymeric materials of the present invention also exhibit nonlinear optical capabilities when formed into an optically transparent medium with a noncentrosymmetric alignment of molecules. The nonlinear optical materials of the present invention are useful in electrooptic devices for use in communications and data-processing. Nonlinear optical films produced from the polymeric material show a reduced tendency to reorient due to thermal motion.
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patent: 5093471 (1992-03-01), West
Chemical Abstracts, vol. 84, No. 12, Mar. 22, 1976, Columbus, Ohio, U.S., abstract No. 751505, A. A. Voronin: "Epoxide Composition", p. 41.
D. R. Ulrich: "Polymers for Nonlinear Optical Applications", vol. 189, Oct. 1990, pp. 3-38.
DE-A-1, 129,281 (Bayer).
M. Eich et al, J. Appl. Phys., 66(7):3241-3247 (1989).
B. Reck et al, SPIE, 1147: 74-83 (1989).
Krass Frederick
The Dow Chemical Company
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