Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Patent
1993-08-30
1996-03-05
Acquah, Samuel A.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
528185, 528210, 528272, 528288, 528289, 528291, 430 20, 430322, 430363, 430945, G03G 1500
Patent
active
054966701
ABSTRACT:
A macroscopically isotropic side chain liquid crystal polymer is described containing photochromic mesogenic groups and which through irradiation with light is capable of being permanently or substantially permanently converted into an optically anisotropic phase without having been pre-oriented. The polymer is preferably a polyester between on the one hand either an aliphatic, optionally substituted, .alpha.,.omega.-dicarboxylic acid having a total chain length of up to 24 carbon atoms, or an aryl-, in particular phenyl-, carboxylic acid, and on the other hand an optionally substituted 1,3-propanediol containing the mesogenic group, or a group containing the mesogenic group, attached to the carbon in the 2-position. Furthermore, an optical storage device comprising a film of the polymer.
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Gibbons et al., Nature, vol. 351, pp. 49-50 (May 2, 1991).
Chen et al., Optics Letters, vol. 17, No. 6, pp. 441-443 (Mar. 15, 1992).
Rochon et al., Appl. Phys. Lett. 60, (1) pp. 4-5 (1992).
Natansohn et al., Macromolecules 25, 2268-2273 (1992).
Natansohn et al., Macromolecules 25, 5531-5532 (1992).
Xie et al., Chem. Mater. 5, 403-411 (1993).
Andruzzi Fulvio
Hvilsted Soren
Ramanujam P. S.
Acquah Samuel A.
Consiglio Nazionale della Richerche
Riso National Laboratory
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