Patent ID: 7786057

Claim:
Compounds of the formula: wherein: each Ar independently represents an aromatic moiety having 0 to 3 substituents selected from the group consisting of alkyl, alkoxy, alkoxyalkyl, hydroxy, hydroxyalkyl, acyloxy, acyloxyalkyl, acyloxyalkoxy, aryloxy, aryloxyalkyl, aryloxyalkoxy, halo and combinations thereof; each L is independently a linking moiety comprising a carbon-carbon single bond or a linking group; from about 98% to 2% of Y′ units are independently a moiety of the formula Z′O— and from about 2% to 98% of Y′ units are independently a moiety of the formula Z(O(CR 2 ) n ) y X—, wherein X is selected from the group consisting of (CR′ 2 ) z , O and S; R and R′ are each independently selected from H, C 1 to C 6 alkyl and aryl; z is 1 to 10; n is 0 to 10 when X is (CR′ 2 ) z , and 2 to 10 when X is O or S; y is 1 to 30; Z is H, an acyl group, a polyacyl group, a lactone ester group, and acid ester group, an alkyl group or an aryl group; Z′ is selected from C 1 to C 100 alkyl and aryl; each a is independently 0 to 3, with the proviso that at least one Ar moiety bears at least one group Z(O(CR 2 ) n ) y X— in which Z is not H; and m is 2 to 100.