Non-linear optically active polycarbonate

Details Non-linear optically active polycarbonate Non-linear optically active polycarbonate

C - Chemistry, Metallurgy

08

G

C08G 64/08 (2006.01) C08G 18/67 (2006.01) C08G 18/77 (2006.01) C08G 18/83 (2006.01) C08G 63/68 (2006.01) C08G 63/682 (2006.01) G02F 1/35 (2006.01) G02F 1/361 (2006.01)

Patent

CA 2133142

NON-LINEAR OPTICALLY ACTIVE POLYCARBONATE Abstract of the Disclosure The invention pertains to a non-linear optically active (NLO) side chain polycarbonate and to NLO active waveguides containing said polycarbonate. Waveguides containing this NLO polycarbonate have a low loss of signal. Polycarbonates based on bischloroformates of hexafluorobisphenol A , hexafluorotetrabromobisphenol A and bisphenol S or deuterated bisphenol A or sulphonylbiphenol are especially preferred within the framework of the invention: they were found to give an exceptionally low loss of signal. The invention further pertains to cross-linkable and already cross-linked polycarbonates. Especially preferred polycarbonates according to the invention are those where the diol comprises a rigid donor group. These polycarbonates have a high Tg, which renders them thermally stable.

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