Patent ID: 6180024
Filing Date: 2001-01-30
Classification: C08F,C09K

Abstract:
A method for the synthesis of a compound of general formula I: ##STR21##wherein m is from 5 to 150;X and Y are independently selected from CN, H, OH, COCH.sub.3, CO.sub.2 H or CO.sub.2 R.sub.1 where R.sub.1 is C.sub.1-12 alkyl, NCS, SCN, CF.sub.3 or CH.sub.2 Q where Q is F, Cl, Br, OH, CHF.sub.2 or formula IB: ##STR22##wherein J for each X and Y group is independently selected from CH.sub.2, single covalent bond, OOC, CO.sub.2, O, CH.sub.2 O, OCH.sub.2, CH.sub.2 CO.sub.2 or CH.sub.2 OOC;p=1 to 20;L for each X and Y group is independently selected from O, CH.sub.2, OCO, CO.sub.2, S or NH; ##STR23##is defined by formula IC: ##STR24##where rings A, B and C are independently selected from phenyl, cyclohexyl, pyridine and pyrimidine and may be independently of each other substituted with at least one of Cl or F;linking groups A and B are selected from single bond, CO.sub.2, OOC, CH.sub.2 O, OCH.sub.2, CH.sub.2 CH.sub.2 or C.tbd.C;Z is selected from CN, F, Cl, NO.sub.2, R, OR, CO.sub.2 R, CF.sub.3, OOCR, NCS or SCN, where R=straight chain or branched chain alkyl and has from 1 to 16 carbon atoms and including where one or more non-adjacent CH.sub.2 groups may be substituted by CH(CN), CH(CF.sub.3), CH(Cl) or CH(CH.sub.3) in chiral or non-chiral form;provided that at least one of X and Y is selected from IB,said method comprising polymerizing a compound of formula II: ##STR25##wherein X and Y are as defined for formula I.