| 摘要 |
1,138,629. Polycarbonate complexes. RANK XEROX Ltd. 17 Jan., 1966 [18 Jan., 1965], No. 2198/66. Heading C3R. [Also in Division H1] The Specification discloses charge-transfer complexes of a Lewis acid and a polycarbonate resin. Preferably the resin has the formula wherein R is phenylene substituted with halogen or alkyl groups or unsubstituted, and X and Y are H, hydrocarbon radicals free from aliphatic unsaturation or together with the adjoining carbon atom form a cyclo alkane group, X and Y together having up to 12 C atoms. In the examples the resins used are the polyester of carbonic acid and bis-(4-hydroxyphenyl)-2,2- propane, and phosgene and tetrachloro-bisphenol A whilst the Lewis acids used are benzophenone tetracarboxylic acid, 2,4,7-trinitrofluorenone, and 2,3-dichloro-1,4-naphthaquinone. Sensitizing dyestuffs such as martius yellow, fluorol 7GA and rhodamine B may also be used. Numerous other Lewis acids both of the organic and inorganic type are specified together with various reactants for forming polycarbonates.
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