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Fluorine containing diaminobenzene derivatives and its use
| Details |
Inventors: Nagase, Yu; Takamura, Yuriko; Kohtoh, Noriaki; Fukuro, Hiroyoshi; Abe, Toyohiko;
Assignee: Sagami Chemical Research Center (Tokyo, JP); Nissan Chemical Industries, Ltd. (Tokyo, JP)
Primary Examiner: Kight, III.; John
Assistant Examiner: Wright; Shelley A.
Attorney, Agent or Firm: Oliff & Berridge
The present invention relates to a novel fluorine-containing diaminobenzene derivatives having a perfluoroalkyl group and to a novel fluorine-containing polyimide which is produced from the said diaminobenzene as a starting material and to a novel polyimide having both a fluorine-containing group and/or a siloxane chain in the side chain thereof, the polyimide being produced from the said fluorine-containing diaminobenzene and fluorine-containing polyimide and to a liquid crystal-aligning agent with an elevated tilt angle, which contains a polyimide having a fluorine-containing group and a siloxane chain. |
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DETAILED DESCRIPTION What is claimed is: 1.
A fluorine-containing diaminobenzene derivative of a general formula (I): ##STR49## where n represents an integer of 1 to 6, p represents an integer of 1 to 12.
Description:
FIELD OF THE INVENTION The present invention relates to a novel fluorine-containing diaminobenzene derivative having a perfluoroalkyl group and to a novel fluorine-containing polyimide and a novel polyimide having both a fluorine-containing group and a siloxane chain in the side chain thereof, both of which are produced from a starting material of the said diaminobenzene derivative and have excellent heat-resistance and solvent-resistance and also an excellent surface characteristc.
It also relates to a liquid crystal-aligning agent, which contains a polyimide having a fluorine-containing group and/or a siloxane chain in the side chain thereof, the polyimide being produced from a starting material of a fluorine-containing diaminobenzene derivative having a perfluoroalkyl group and/or a siloxane-containing diaminobenzene derivative having a siloxane chain and having excellent heat-resistance and solvent-resistance and also an excellent surface characteristic.
Where a substrate for a liquid crystal is treated with the liquid crystal-treating agent, liquid crystal molecules as provided on the substrate may well be aligned to the substrate with an elevated tilt angle.
In particular, the polyimide of the present invention, which has both a fluorine-containing group and a siloxane chain in the side chain thereof, may be formed into a film which displays excellent heat-resistance, permeability and separatability when used in separation of a gaseous mixture or a liquid mixture.
It may well be thinned with ease to give a thin film having a sufficient film strength and a high separating capacity.
The film is therefore useful as a separation film.
BACKGROUND OF THE INVENTION Hitherto, aromatic polyimides have widely been used as protecting materials, insulating materials and adhesives in the filed of electronic appliances and also as films or construction materials in other various fields, because of their high mechanical strength, heat-resistance and solvent-resistance
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