Use of fluorinated aromatic polyamides as orientation layer...

Details Use of fluorinated aromatic polyamides as orientation layer... Use of fluorinated aromatic polyamides as orientation layer...

C - Chemistry, Metallurgy

09

K

C09K 19/10 (2006.01) C08G 69/32 (2006.01) G02F 1/1337 (2006.01)

Patent

CA 2068885

- 15 - HOE 89/F367 Abstract of the disclosure Use of fluorinated aromatic polyamides as orientation layer for liquid crystal switching and display devices Use of substituted aromatic polyamides as orientation layer in liquid crystal switching and display elements is described, in which the polyamides contain structural units of the formula (I) Image (I) in which in formula I the symbols have the following meaning: -X- = Image , Image , Image , -Y- = Image in which R1 and R2 are identical or different and are perfluorinated alkyl having 1 to 4 carbon atoms, R3 and R4 are identical or different and are H or CF3, and in which -W- is, for example, -O-, -C(CH3)2-, -C(CF3)2-. Orientation layers made of these polyamides can be cured at low temperatures, have good adhesion and high trans- mittance and allow for a high surface tilt angle.

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