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    • 46. 发明申请
    • NON-LINEAR OPTICALLY ACTIVE POLYURETHANES HAVING HIGH GLASS TRANSITION TEMPERATURES
    • 具有高玻璃化转变温度的非线性光学活性聚氨酯
    • WO1994001480A1
    • 1994-01-20
    • PCT/EP1993001587
    • 1993-06-21
    • AKZO N.V.HAMS, Bernardus, Henrikus, MariaVAN VEGGEL, Franciscus, Cornelis, Jacobus, MariaVAN DER VORST, Cornelis, Petrus, Jacobus, Maria
    • AKZO N.V.
    • C08G18/67
    • C08G18/3819C08G18/3836C08G18/384C08G18/678G02F1/3617
    • The invention relates to a non-linear optically active polyurethane comprising a polymeric main chain and a donor-(pi)-acceptor sidegroup, with the sidegroup comprising a rigid donor group which is also part of the polymeric main chain. By incorporating rigid donor groups into the non-linear optically active polyurethane a high glass transition temperature (Tg above 170 C) is obtained, and hence increased thermal stability. The invention further relates to non-linear optically active polyurethanes having a Tg above 170 C, and to non-linear optically active waveguides comprising non-linear optically active polyurethanes according to the invention. Suitable rigid donor groups include nitrogen- or sulphur-containing alicyclic groups. In particular, dihydroxy pyrrolidine groups in which the nitrogen atom is directly coupled to the (pi)-acceptor group and dithiafulvene groups were found to be highly suitable for obtaining non-linear optically active polyurethanes of good thermal stability and polarizability.
    • 本发明涉及包含聚合主链和供体 - (pi) - 受体侧基的非线性光学活性聚氨酯,其侧链包括也是聚合主链的一部分的刚性供体基团。 通过将刚性供体基团并入非线性光学活性聚氨酯中,获得高玻璃化转变温度(Tg高于170℃),因此增加了热稳定性。 本发明还涉及Tg高于170℃的非线性光学活性聚氨酯和包含根据本发明的非线性光学活性聚氨酯的非线性光学活性波导。 合适的刚性给体基团包括含氮或含硫的脂环族基团。 特别地,发现其中氮原子直接连接到(pi)受体基团和二硫富维烯基团的二羟基吡咯烷基团非常适合于获得具有良好热稳定性和极化性的非线性光学活性聚氨酯。