13.
    发明专利
    未知

    公开(公告)号:DE69700925D1

    公开(公告)日:2000-01-20

    申请号:DE69700925

    申请日:1997-02-06

    Applicant: JSR CORP

    Abstract: There are provided a polyamic acid obtainable by reacting a diamine compound of the formula (1) wherein R is an alkyl group having 1 to 12 carbon atoms, a haloalkyl group having 1 to 12 carbon atoms or a halogen atom, each of X and Y is independently a divalent linking group, with a tetracarboxylic acid dianhydride; a polyimide obtainable by dehydrating and ring-closing the above polyamic acid; and a liquid crystal aligning agent containing the above polyamic acid and/or the above polyimide.

    15.
    发明专利
    未知

    公开(公告)号:DE69732949T2

    公开(公告)日:2006-02-23

    申请号:DE69732949

    申请日:1997-05-15

    Applicant: JSR CORP

    Abstract: A liquid crystal alignment agent containing at least two kinds of polymers selected from the group consisting of polyamic acids and imidized polymers and having a structure obtained by dehydration and ring closure of polyamic acid. In the at least two kinds of polymers contained in the liquid crystal alignment agent, the polymer of higher imidization degree has a smaller surface free energy. The liquid crystal alignment agent gives a liquid crystal display device having less stuck image and high pretilt angle.

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