Patent ID: 6197223
Filing Date: 2001-03-06
Classification: C09B

Abstract:
A method comprising reactinga) at least one diacidic monomer having the formula H--A--H, comprising about 1 to 100 mole % of at least one light-absorbing monomer having a light absorption maximum between about 300 nm and about 1200 nm and 99-0 mole % of a non-light absorbing monomer which does not absorb significant light at wavelengths above 300 nm or has a light absorption maximum below 300 nm, withb) an organic compound having the formulaX--B--X.sub.1wherein B is a divalent organic radical selected from the group consisting of C.sub.2 -C.sub.12 alkylene, C.sub.3 -C.sub.8 cycloalkylene, C.sub.1 -C.sub.4 alkylene-C.sub.3 -C.sub.8 -cycloalkylene-C.sub.1 -C.sub.4 alkylene, C.sub.1 -C.sub.4 alkylene-arylene-C.sub.1 -C.sub.4 alkylene, C.sub.2 -C.sub.4 -alkylene-L-arylene-L--C.sub.2 -C.sub.4 alkylene and C.sub.2 -C.sub.4 alkylene-(L--C.sub.2 -C.sub.4 alkylene).sub.1-4, wherein L is a linking group selected from the group consisting of --O--, --S--, --SO.sub.2 --, --NH--, --N(C.sub.1 -C.sub.6 alkyl)--, --N(aryl)--, --N(SO.sub.2 C.sub.1 -C.sub.6 alkyl)--, --N(SO.sub.2 aryl)--, --SO.sub.2 N(C.sub.1 -C.sub.6 alkyl)-- and combinations thereof; X and X.sub.1 are reactive groups and are independently selected from the group consisting of bromine, iodine and R--SO.sub.2 O; wherein R is selected from the group consisting of C.sub.1 -C.sub.6 alkyl; C.sub.1 -C.sub.6 alkyl substituted with chlorine, fluorine, C.sub.1 -C.sub.6 alkoxy, aryl, aryloxy, arylthio or C.sub.3 -C.sub.8 cycloalkyl; C.sub.3 -C.sub.8 cycloalkyl or aryl,wherein said reaction is carried out in a solvent in the presence of a base to form a light absorbing composition comprising a mixture of a polymer having the formula ##STR584##and a cyclic compound having the general formula ##STR585##wherein B is as defined above, n is at least 2, m is 1, 2, 3 or 4 and A comprises the residue of said diacidic monomer.