4.
    发明专利
    未知

    公开(公告)号:AT492585T

    公开(公告)日:2011-01-15

    申请号:AT04716343

    申请日:2004-03-02

    Abstract: A method for producing an aromatic polymer containing aromatic polyamide structural units and aromatic carbohydrazide structural units at a specific ratio is disclosed. A film having a high Young's modulus, high elongation at break and low moisture absorption can be formed from such an aromatic polymer. Dehydration cyclization of a compound having a carbohydrazide structure can be conducted under mild conditions at low cost by causing the chemical reaction using a chemical which is selected from the acids and bases.

Patent Agency Ranking