Patent ID: 7361612

Claim:
A barrier coating composition comprising: a polymer having a weight average molecular weight (Mw) of 5,000 to 200,000 daltons; and an organic solvent, wherein the polymer corresponds to formula I: wherein each of the expressions (1+m+n)=1; 0.1≦(1/(1+m+n))≦0.7; 0.3≦(m/(1+m+n))≦0.9; and 0.0≦(n/(1+m+n))≦0.6 is satisfied; wherein R 1 , R 2 and R 3 are independently selected from a group consisting of C 1 to C 5 alkyls, C 1 to C 5 alkoxy and hydroxyl groups and mixtures thereof; and wherein Z is an alkene monomer that includes a hydrophilic group.