Thermotropic copolyesters of 4,4'-biphenyldicarboxylic acid

Details Thermotropic copolyesters of 4,4'-biphenyldicarboxylic acid Thermotropic copolyesters of 4,4'-biphenyldicarboxylic acid

C - Chemistry, Metallurgy

08

G

402/186

C08G 63/00 (2006.01) C08G 63/60 (2006.01)

Patent

CA 2017423

ABSTRACT Disclosed is a copolymer oapable of forming an optically anisotropic melt comprising recurring structural units of formulas I, II III; and IV and optionally V: Image I, Image II, Image III, Image IV, Image V , 37,907-F wherein each R is independently hydrogen, halogen, lower alkyl, methoxy or phenyl; R1 is lower alkyl; R2 is independently hydrogen, halogen, methoxy or phenyl. The present invention also relates to a process for preparing the copolymer. The copolymers of the present invention usually have a low melting point below 350°C and can be readily melt extruded into fibers, films or the like. 37,907-F

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