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公开(公告)号:US3856714A
公开(公告)日:1974-12-24
申请号:US39525573
申请日:1973-09-07
Applicant: POLAROID CORP
CPC classification number: C08G73/0273 , C08G69/26 , Y10S526/923
Abstract: Novel polyviologen compounds useful in variable density lightfiltering devices are provided which have repeating units (in oxidized dicationic form) represented by the formula: WHEREIN R1 is propylene or a straight-chain alkylene group having from six to 12 carbon atoms; R2 is -H or a hydrocarbon group having from one to six carbon atoms; Z is a bivalent radical resulting from the removal of both active halogen atoms from an aromatic dihalide or from an aliphatic dicarboxylic acid dihalide having a straight four to eight carbon alkylene chain between terminal carboxylic acid halide groups; and X is an anion.
Abstract translation: 提供了可用于可变密度光过滤装置的新型聚变体化合物,其具有由下式表示的重复单元(以氧化的阳离子形式):