会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 23. 发明专利
    • DE69519713T2
    • 2001-05-31
    • DE69519713
    • 1995-10-05
    • CHISSO CORP
    • SAWAI TOSHIYAOIKAWA SEIJIYAZAWA MASAAKIMURATA SHIZUOHAYAKAWA MASAHARUNAKAGAWA ETSUOSAWADA SHINICHI
    • C07C211/50C08G73/10G02F1/1337C09K19/56
    • An object of the invention is to propose diamino compounds expressed by the following general formula (1) which are suitable to obtain a raw material, a polyimide resin, for a liquid crystal aligning film without any image sticking and with a high voltage holding ratio at from a low temperature to a high temperature as well as the preparation thereof: wherein, (a) when R being a hydrogen atom and D being , all of R , R , R and R denote a hydrogen atom, and R , R , R , R , R , R , R , R , R , R , R and R denote independently each other a hydrogen atom or an alkyl group with 1 to 8 carbon atoms, (b) when R being a hydrogen atom and D being , all of R , R , R and R denote a hydrogen atom, and R and R , R and R , R and R , as well as R and R are respectively the same atoms or groups and denote independently each other hydrogen atoms or straight-chain or branched alkyl groups with 1 to 8 carbon atoms, and R , R , R , R , R , R , R and R denote independently each other a hydrogen atom or an alkyl group with 1 to 8 carbon atoms, (c) when R being a hydrogen atom and D being a divalent straight-chain or branched hydrocarbon group with 2 to 30 carbon atoms, R , R , R and R denote independently a hydrogen atom or a straight-chain or branched alkyl group with 1 to 8 carbon atoms, and R and R , R and R , R and R as well as R and R are respectively the same atoms or groups and denote independently each other hydrogen atoms or straight-chain or branched alkyl groups with 1 to 8 carbon atoms, (d) when R being a straight-chain or branched alkyl group with 1 to 12 carbon atoms, D denotes a direct bond, an aliphatic group with 1 to 30 carbon atoms, an aromatic group with 6 to 30 carbon atoms, or a divalent hydrocarbon group with 7 to 30 carbon atoms having both an aliphatic group and an aromatic group, R , R , R and R denote independently a hydrogen atom or a straight-chain or branched alkyl group with 1 to 8 carbon atoms, and R and R , R and R , R and R as well as R and R are respectively the same atoms or groups and denote independently each other hydrogen atoms or straight-chain or branched alkyl groups with 1 to 8 carbon atoms.