Patent ID: 6320020
Filing Date: 2001-11-20
Classification: C08G,G02B

Abstract:
A sulfur-containing (thio)ether (co)polymer comprising repetitive structural units represented by general formulas 1 and 2: ##STR297##where A and B, which may be the same or different, are bivalent organic group; R.sup.1 and R.sup.2 are independently hydrogen or alkyl; X.sup.1 to X.sup.4, which may be the same or different, are independently oxygen or sulfur; Y.sup.1 and Y.sup.2, which may be the same or different, are independently halogen, hydroxy, --OR.sup.3 or --SR.sup.4, in which R.sup.3 is sulfur-containing alkyl, aryl, heterocycle or acyl optionally having a substituent other than SH and R.sup.4 is non-substituted or substituted alkyl, aryl, heterocycle or acyl although when at least one of X.sup.1 to X.sup.4 is sulfur, R.sup.3 may not contain a sulfur atom; provided that --OR.sup.3 and/or --SR.sup.4 constitute 10 to 100% of the total of Y.sup.1 +Y.sup.2.