NOVEL POLYMERS OF3,4-SUBSTITUTED PYRROLE COMPOUND AND PROCESSFOR THEIR PREPARATION

摘要

PCT No. PCT/JP86/00399 Sec. 371 Date Apr. 27, 1987 Sec. 102(e) Date Apr. 27, 1987 PCT Filed Aug. 4, 1986 PCT Pub. No. WO87/00843 PCT Pub. Date Feb. 12, 1987.Polymers of a 3,4-substituted pyrrole compound substituted by an electron-attractive group having a Hammett's substituent constant ( sigma p) of 0.30 to 0.80 in at least one of the 3- and 4- positions are disclosed. The polymers are stable in the air in a dope-free state and show distinct electrochromism. Some of them are soluble in an alkaline aqueous solvent. Therefore, they are useful as electrochromic elements, etc.