1. A moiety according to the formula 3 wherein each R is individually selected from the group consisting of —OH, —CH 2 OH, —O—R 1 —O—X, and —CH 2 —O—R 1 —O—X, with at least one of said R's being —O—R 1 —O—X or —CH 2 —O—R 1 —O—X, and wherein each R 1 is individually selected from the group consisting of branched and unbranched alkyl groups, and each X is individually selected from the group consisting of substituted and unsubstituted aryl isocyanates.