- Solvent-based green 5 isomer of the solvent-based dye
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The invention discloses a solvent dye composition for solving the problems of poor high-temperature resistance and limited application range of solvent green 5 in the prior art. The solvent dye composition is composed of the following components in percentage by mass: 85-88% of 3, 9-perylenedicarboxylic acid bis(2-methylpropyl) ester and 12-15% of 3, 10-perylenedicarboxylic acid bis(2-methylpropyl) ester. The solvent dye composition disclosed by the invention is simple and reasonable in component ratio, good in high-temperature resistance and capable of completely replacing a solvent green 5; the melting point of the solvent dye composition can be up to 328-330 DEG C. The invention also discloses a preparation method of the solvent dye composition. The preparation method comprises the following steps: (1) preparing 3, 9-perylenedicarboxylic acid and 3, 10-perylenedicarboxylic acid; (2) preparing 3, 9-perylenedicarboxylic acid bis(2-methylpropyl) ester and 3, 10-perylenedicarboxylic acid bis(2-methylpropyl) ester; (3) compounding. The preparation method disclosed by the invention is simple in process step, strong in operability, low in cost and suitable for industrial production.
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Paragraph 0015; 0016; 0021-0025
(2017/04/03)
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- NEW YELLOW DYES FOR GUEST-HOST APPLICATIONS
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A study is presented of the optical order parameters and spectroscopic properties of 3'-hydroxyquinophthalone and 3,9-disubstituted perylene dyes in nematic liquid crystalline mixtures.The results of this study are discussed in terms of the effects of the dye structure on the order parameters.From the systematic variation in structure, it is found that a thioester group and a short flexible chain such as an n-butyl group play a significant role in increasing the order parameters.In addition, preliminary data on the solubility and photostability of the dyes are reported.Keywords: guest-host, dichroic dye, liquid crystal, quinophthalone, perylene, order parameter
- Imazeki, Shuji,Mukoh, Akio,Yoneyama, Tomio,Kaneko, Masaharu
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